зеркало из https://github.com/mozilla/gecko-dev.git
4519 строки
171 KiB
C++
4519 строки
171 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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// vim:cindent:ts=2:et:sw=2:
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* utility functions for drawing borders and backgrounds */
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#include <ctime>
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#include "gfx2DGlue.h"
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#include "gfxContext.h"
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/DebugOnly.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/Helpers.h"
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#include "mozilla/gfx/PathHelpers.h"
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#include "mozilla/HashFunctions.h"
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#include "mozilla/MathAlgorithms.h"
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#include "BorderConsts.h"
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#include "nsStyleConsts.h"
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#include "nsPresContext.h"
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#include "nsIFrame.h"
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#include "nsIFrameInlines.h"
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#include "nsPoint.h"
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#include "nsRect.h"
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#include "nsIPresShell.h"
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#include "nsFrameManager.h"
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#include "nsStyleContext.h"
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#include "nsGkAtoms.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsIContent.h"
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#include "nsIDocumentInlines.h"
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#include "nsIScrollableFrame.h"
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#include "imgIRequest.h"
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#include "imgIContainer.h"
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#include "ImageOps.h"
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#include "nsCSSRendering.h"
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#include "nsCSSColorUtils.h"
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#include "nsITheme.h"
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#include "nsThemeConstants.h"
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#include "nsLayoutUtils.h"
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#include "nsBlockFrame.h"
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#include "nsStyleStructInlines.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsCSSProps.h"
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#include "nsContentUtils.h"
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#include "nsSVGEffects.h"
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#include "nsSVGIntegrationUtils.h"
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#include "gfxDrawable.h"
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#include "GeckoProfiler.h"
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#include "nsCSSRenderingBorders.h"
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#include "mozilla/css/ImageLoader.h"
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#include "ImageContainer.h"
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#include "mozilla/Telemetry.h"
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#include "gfxUtils.h"
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#include "gfxGradientCache.h"
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#include "nsInlineFrame.h"
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#include "nsRubyTextContainerFrame.h"
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#include <algorithm>
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#include "SVGImageContext.h"
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#include "mozilla/layers/WebRenderDisplayItemLayer.h"
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using namespace mozilla;
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using namespace mozilla::css;
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using namespace mozilla::gfx;
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using namespace mozilla::image;
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using mozilla::CSSSizeOrRatio;
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static int gFrameTreeLockCount = 0;
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// To avoid storing this data on nsInlineFrame (bloat) and to avoid
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// recalculating this for each frame in a continuation (perf), hold
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// a cache of various coordinate information that we need in order
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// to paint inline backgrounds.
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struct InlineBackgroundData
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{
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InlineBackgroundData()
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: mFrame(nullptr), mLineContainer(nullptr)
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{
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}
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~InlineBackgroundData()
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{
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}
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void Reset()
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{
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mBoundingBox.SetRect(0,0,0,0);
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mContinuationPoint = mLineContinuationPoint = mUnbrokenMeasure = 0;
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mFrame = mLineContainer = nullptr;
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mPIStartBorderData.Reset();
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}
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/**
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* Return a continuous rect for (an inline) aFrame relative to the
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* continuation that draws the left-most part of the background.
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* This is used when painting backgrounds.
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*/
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nsRect GetContinuousRect(nsIFrame* aFrame)
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{
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MOZ_ASSERT(static_cast<nsInlineFrame*>(do_QueryFrame(aFrame)));
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SetFrame(aFrame);
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nscoord pos; // an x coordinate if writing-mode is horizontal;
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// y coordinate if vertical
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if (mBidiEnabled) {
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pos = mLineContinuationPoint;
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// Scan continuations on the same line as aFrame and accumulate the widths
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// of frames that are to the left (if this is an LTR block) or right
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// (if it's RTL) of the current one.
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bool isRtlBlock = (mLineContainer->StyleVisibility()->mDirection ==
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NS_STYLE_DIRECTION_RTL);
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nscoord curOffset = mVertical ? aFrame->GetOffsetTo(mLineContainer).y
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: aFrame->GetOffsetTo(mLineContainer).x;
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// If the continuation is fluid we know inlineFrame is not on the same line.
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// If it's not fluid, we need to test further to be sure.
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nsIFrame* inlineFrame = aFrame->GetPrevContinuation();
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while (inlineFrame && !inlineFrame->GetNextInFlow() &&
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AreOnSameLine(aFrame, inlineFrame)) {
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nscoord frameOffset = mVertical
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? inlineFrame->GetOffsetTo(mLineContainer).y
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: inlineFrame->GetOffsetTo(mLineContainer).x;
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if (isRtlBlock == (frameOffset >= curOffset)) {
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pos += mVertical
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? inlineFrame->GetSize().height
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: inlineFrame->GetSize().width;
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}
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inlineFrame = inlineFrame->GetPrevContinuation();
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}
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inlineFrame = aFrame->GetNextContinuation();
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while (inlineFrame && !inlineFrame->GetPrevInFlow() &&
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AreOnSameLine(aFrame, inlineFrame)) {
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nscoord frameOffset = mVertical
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? inlineFrame->GetOffsetTo(mLineContainer).y
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: inlineFrame->GetOffsetTo(mLineContainer).x;
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if (isRtlBlock == (frameOffset >= curOffset)) {
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pos += mVertical
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? inlineFrame->GetSize().height
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: inlineFrame->GetSize().width;
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}
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inlineFrame = inlineFrame->GetNextContinuation();
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}
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if (isRtlBlock) {
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// aFrame itself is also to the right of its left edge, so add its width.
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pos += mVertical ? aFrame->GetSize().height : aFrame->GetSize().width;
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// pos is now the distance from the left [top] edge of aFrame to the right [bottom] edge
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// of the unbroken content. Change it to indicate the distance from the
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// left [top] edge of the unbroken content to the left [top] edge of aFrame.
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pos = mUnbrokenMeasure - pos;
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}
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} else {
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pos = mContinuationPoint;
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}
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// Assume background-origin: border and return a rect with offsets
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// relative to (0,0). If we have a different background-origin,
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// then our rect should be deflated appropriately by our caller.
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return mVertical
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? nsRect(0, -pos, mFrame->GetSize().width, mUnbrokenMeasure)
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: nsRect(-pos, 0, mUnbrokenMeasure, mFrame->GetSize().height);
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}
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/**
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* Return a continuous rect for (an inline) aFrame relative to the
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* continuation that should draw the left[top]-border. This is used when painting
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* borders and clipping backgrounds. This may NOT be the same continuous rect
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* as for drawing backgrounds; the continuation with the left[top]-border might be
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* somewhere in the middle of that rect (e.g. BIDI), in those cases we need
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* the reverse background order starting at the left[top]-border continuation.
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*/
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nsRect GetBorderContinuousRect(nsIFrame* aFrame, nsRect aBorderArea)
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{
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// Calling GetContinuousRect(aFrame) here may lead to Reset/Init which
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// resets our mPIStartBorderData so we save it ...
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PhysicalInlineStartBorderData saved(mPIStartBorderData);
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nsRect joinedBorderArea = GetContinuousRect(aFrame);
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if (!saved.mIsValid || saved.mFrame != mPIStartBorderData.mFrame) {
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if (aFrame == mPIStartBorderData.mFrame) {
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if (mVertical) {
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mPIStartBorderData.SetCoord(joinedBorderArea.y);
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} else {
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mPIStartBorderData.SetCoord(joinedBorderArea.x);
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}
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} else if (mPIStartBorderData.mFrame) {
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if (mVertical) {
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mPIStartBorderData.SetCoord(GetContinuousRect(mPIStartBorderData.mFrame).y);
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} else {
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mPIStartBorderData.SetCoord(GetContinuousRect(mPIStartBorderData.mFrame).x);
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}
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}
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} else {
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// ... and restore it when possible.
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mPIStartBorderData.mCoord = saved.mCoord;
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}
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if (mVertical) {
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if (joinedBorderArea.y > mPIStartBorderData.mCoord) {
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joinedBorderArea.y =
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-(mUnbrokenMeasure + joinedBorderArea.y - aBorderArea.height);
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} else {
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joinedBorderArea.y -= mPIStartBorderData.mCoord;
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}
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} else {
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if (joinedBorderArea.x > mPIStartBorderData.mCoord) {
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joinedBorderArea.x =
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-(mUnbrokenMeasure + joinedBorderArea.x - aBorderArea.width);
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} else {
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joinedBorderArea.x -= mPIStartBorderData.mCoord;
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}
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}
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return joinedBorderArea;
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}
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nsRect GetBoundingRect(nsIFrame* aFrame)
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{
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SetFrame(aFrame);
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// Move the offsets relative to (0,0) which puts the bounding box into
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// our coordinate system rather than our parent's. We do this by
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// moving it the back distance from us to the bounding box.
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// This also assumes background-origin: border, so our caller will
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// need to deflate us if needed.
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nsRect boundingBox(mBoundingBox);
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nsPoint point = mFrame->GetPosition();
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boundingBox.MoveBy(-point.x, -point.y);
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return boundingBox;
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}
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protected:
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// This is a coordinate on the inline axis, but is not a true logical inline-
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// coord because it is always measured from left to right (if horizontal) or
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// from top to bottom (if vertical), ignoring any bidi RTL directionality.
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// We'll call this "physical inline start", or PIStart for short.
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struct PhysicalInlineStartBorderData {
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nsIFrame* mFrame; // the continuation that may have a left-border
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nscoord mCoord; // cached GetContinuousRect(mFrame).x or .y
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bool mIsValid; // true if mCoord is valid
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void Reset() { mFrame = nullptr; mIsValid = false; }
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void SetCoord(nscoord aCoord) { mCoord = aCoord; mIsValid = true; }
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};
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nsIFrame* mFrame;
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nsIFrame* mLineContainer;
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nsRect mBoundingBox;
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nscoord mContinuationPoint;
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nscoord mUnbrokenMeasure;
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nscoord mLineContinuationPoint;
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PhysicalInlineStartBorderData mPIStartBorderData;
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bool mBidiEnabled;
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bool mVertical;
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void SetFrame(nsIFrame* aFrame)
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{
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NS_PRECONDITION(aFrame, "Need a frame");
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NS_ASSERTION(gFrameTreeLockCount > 0,
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"Can't call this when frame tree is not locked");
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if (aFrame == mFrame) {
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return;
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}
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nsIFrame *prevContinuation = GetPrevContinuation(aFrame);
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if (!prevContinuation || mFrame != prevContinuation) {
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// Ok, we've got the wrong frame. We have to start from scratch.
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Reset();
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Init(aFrame);
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return;
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}
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// Get our last frame's size and add its width to our continuation
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// point before we cache the new frame.
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mContinuationPoint += mVertical ? mFrame->GetSize().height
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: mFrame->GetSize().width;
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// If this a new line, update mLineContinuationPoint.
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if (mBidiEnabled &&
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(aFrame->GetPrevInFlow() || !AreOnSameLine(mFrame, aFrame))) {
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mLineContinuationPoint = mContinuationPoint;
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}
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mFrame = aFrame;
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}
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nsIFrame* GetPrevContinuation(nsIFrame* aFrame)
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{
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nsIFrame* prevCont = aFrame->GetPrevContinuation();
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if (!prevCont &&
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(aFrame->GetStateBits() & NS_FRAME_PART_OF_IBSPLIT)) {
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nsIFrame* block =
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aFrame->GetProperty(nsIFrame::IBSplitPrevSibling());
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if (block) {
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// The {ib} properties are only stored on first continuations
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NS_ASSERTION(!block->GetPrevContinuation(),
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"Incorrect value for IBSplitPrevSibling");
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prevCont =
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block->GetProperty(nsIFrame::IBSplitPrevSibling());
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NS_ASSERTION(prevCont, "How did that happen?");
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}
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}
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return prevCont;
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}
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nsIFrame* GetNextContinuation(nsIFrame* aFrame)
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{
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nsIFrame* nextCont = aFrame->GetNextContinuation();
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if (!nextCont &&
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(aFrame->GetStateBits() & NS_FRAME_PART_OF_IBSPLIT)) {
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// The {ib} properties are only stored on first continuations
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aFrame = aFrame->FirstContinuation();
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nsIFrame* block = aFrame->GetProperty(nsIFrame::IBSplitSibling());
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if (block) {
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nextCont = block->GetProperty(nsIFrame::IBSplitSibling());
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NS_ASSERTION(nextCont, "How did that happen?");
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}
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}
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return nextCont;
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}
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void Init(nsIFrame* aFrame)
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{
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mPIStartBorderData.Reset();
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mBidiEnabled = aFrame->PresContext()->BidiEnabled();
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if (mBidiEnabled) {
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// Find the line container frame
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mLineContainer = aFrame;
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while (mLineContainer &&
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mLineContainer->IsFrameOfType(nsIFrame::eLineParticipant)) {
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mLineContainer = mLineContainer->GetParent();
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}
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MOZ_ASSERT(mLineContainer, "Cannot find line containing frame.");
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MOZ_ASSERT(mLineContainer != aFrame, "line container frame "
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"should be an ancestor of the target frame.");
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}
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mVertical = aFrame->GetWritingMode().IsVertical();
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// Start with the previous flow frame as our continuation point
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// is the total of the widths of the previous frames.
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nsIFrame* inlineFrame = GetPrevContinuation(aFrame);
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while (inlineFrame) {
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if (!mPIStartBorderData.mFrame &&
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!(mVertical ? inlineFrame->GetSkipSides().Top()
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: inlineFrame->GetSkipSides().Left())) {
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mPIStartBorderData.mFrame = inlineFrame;
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}
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nsRect rect = inlineFrame->GetRect();
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mContinuationPoint += mVertical ? rect.height : rect.width;
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if (mBidiEnabled && !AreOnSameLine(aFrame, inlineFrame)) {
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mLineContinuationPoint += mVertical ? rect.height : rect.width;
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}
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mUnbrokenMeasure += mVertical ? rect.height : rect.width;
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mBoundingBox.UnionRect(mBoundingBox, rect);
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inlineFrame = GetPrevContinuation(inlineFrame);
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}
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// Next add this frame and subsequent frames to the bounding box and
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// unbroken width.
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inlineFrame = aFrame;
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while (inlineFrame) {
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if (!mPIStartBorderData.mFrame &&
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!(mVertical ? inlineFrame->GetSkipSides().Top()
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: inlineFrame->GetSkipSides().Left())) {
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mPIStartBorderData.mFrame = inlineFrame;
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}
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nsRect rect = inlineFrame->GetRect();
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mUnbrokenMeasure += mVertical ? rect.height : rect.width;
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mBoundingBox.UnionRect(mBoundingBox, rect);
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inlineFrame = GetNextContinuation(inlineFrame);
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}
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mFrame = aFrame;
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}
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bool AreOnSameLine(nsIFrame* aFrame1, nsIFrame* aFrame2) {
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if (nsBlockFrame* blockFrame = do_QueryFrame(mLineContainer)) {
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bool isValid1, isValid2;
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nsBlockInFlowLineIterator it1(blockFrame, aFrame1, &isValid1);
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nsBlockInFlowLineIterator it2(blockFrame, aFrame2, &isValid2);
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return isValid1 && isValid2 &&
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// Make sure aFrame1 and aFrame2 are in the same continuation of
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// blockFrame.
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it1.GetContainer() == it2.GetContainer() &&
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// And on the same line in it
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it1.GetLine() == it2.GetLine();
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}
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if (nsRubyTextContainerFrame* rtcFrame = do_QueryFrame(mLineContainer)) {
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nsBlockFrame* block = nsLayoutUtils::FindNearestBlockAncestor(rtcFrame);
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// Ruby text container can only hold one line of text, so if they
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// are in the same continuation, they are in the same line. Since
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// ruby text containers are bidi isolate, they are never split for
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// bidi reordering, which means being in different continuation
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// indicates being in different lines.
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for (nsIFrame* frame = rtcFrame->FirstContinuation();
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frame; frame = frame->GetNextContinuation()) {
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bool isDescendant1 =
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nsLayoutUtils::IsProperAncestorFrame(frame, aFrame1, block);
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bool isDescendant2 =
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nsLayoutUtils::IsProperAncestorFrame(frame, aFrame2, block);
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if (isDescendant1 && isDescendant2) {
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return true;
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}
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if (isDescendant1 || isDescendant2) {
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return false;
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}
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}
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MOZ_ASSERT_UNREACHABLE("None of the frames is a descendant of this rtc?");
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}
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MOZ_ASSERT_UNREACHABLE("Do we have any other type of line container?");
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return false;
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}
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};
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/* Local functions */
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static nscolor MakeBevelColor(mozilla::Side whichSide, uint8_t style,
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nscolor aBackgroundColor,
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nscolor aBorderColor);
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static InlineBackgroundData* gInlineBGData = nullptr;
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// Initialize any static variables used by nsCSSRendering.
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void nsCSSRendering::Init()
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{
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NS_ASSERTION(!gInlineBGData, "Init called twice");
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gInlineBGData = new InlineBackgroundData();
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}
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// Clean up any global variables used by nsCSSRendering.
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void nsCSSRendering::Shutdown()
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{
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delete gInlineBGData;
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gInlineBGData = nullptr;
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}
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/**
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* Make a bevel color
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*/
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static nscolor
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MakeBevelColor(mozilla::Side whichSide, uint8_t style,
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nscolor aBackgroundColor, nscolor aBorderColor)
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{
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nscolor colors[2];
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nscolor theColor;
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|
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// Given a background color and a border color
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// calculate the color used for the shading
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NS_GetSpecial3DColors(colors, aBackgroundColor, aBorderColor);
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if ((style == NS_STYLE_BORDER_STYLE_OUTSET) ||
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(style == NS_STYLE_BORDER_STYLE_RIDGE)) {
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// Flip colors for these two border styles
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switch (whichSide) {
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case eSideBottom: whichSide = eSideTop; break;
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case eSideRight: whichSide = eSideLeft; break;
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case eSideTop: whichSide = eSideBottom; break;
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case eSideLeft: whichSide = eSideRight; break;
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}
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}
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switch (whichSide) {
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case eSideBottom:
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theColor = colors[1];
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break;
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case eSideRight:
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theColor = colors[1];
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break;
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case eSideTop:
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theColor = colors[0];
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break;
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case eSideLeft:
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default:
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theColor = colors[0];
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break;
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}
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return theColor;
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}
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static bool
|
||
GetRadii(nsIFrame* aForFrame, const nsStyleBorder& aBorder,
|
||
const nsRect& aOrigBorderArea, const nsRect& aBorderArea,
|
||
nscoord aRadii[8])
|
||
{
|
||
bool haveRoundedCorners;
|
||
nsSize sz = aBorderArea.Size();
|
||
nsSize frameSize = aForFrame->GetSize();
|
||
if (&aBorder == aForFrame->StyleBorder() &&
|
||
frameSize == aOrigBorderArea.Size()) {
|
||
haveRoundedCorners = aForFrame->GetBorderRadii(sz, sz, Sides(), aRadii);
|
||
} else {
|
||
haveRoundedCorners =
|
||
nsIFrame::ComputeBorderRadii(aBorder.mBorderRadius, frameSize, sz, Sides(), aRadii);
|
||
}
|
||
|
||
return haveRoundedCorners;
|
||
}
|
||
|
||
static bool
|
||
GetRadii(nsIFrame* aForFrame, const nsStyleBorder& aBorder,
|
||
const nsRect& aOrigBorderArea, const nsRect& aBorderArea,
|
||
RectCornerRadii* aBgRadii)
|
||
{
|
||
nscoord radii[8];
|
||
bool haveRoundedCorners = GetRadii(aForFrame, aBorder, aOrigBorderArea, aBorderArea, radii);
|
||
|
||
if (haveRoundedCorners) {
|
||
auto d2a = aForFrame->PresContext()->AppUnitsPerDevPixel();
|
||
nsCSSRendering::ComputePixelRadii(radii, d2a, aBgRadii);
|
||
}
|
||
return haveRoundedCorners;
|
||
}
|
||
|
||
static nsRect
|
||
JoinBoxesForBlockAxisSlice(nsIFrame* aFrame, const nsRect& aBorderArea)
|
||
{
|
||
// Inflate the block-axis size as if our continuations were laid out
|
||
// adjacent in that axis. Note that we don't touch the inline size.
|
||
nsRect borderArea = aBorderArea;
|
||
nscoord bSize = 0;
|
||
auto wm = aFrame->GetWritingMode();
|
||
nsIFrame* f = aFrame->GetNextContinuation();
|
||
for (; f; f = f->GetNextContinuation()) {
|
||
MOZ_ASSERT(!(f->GetStateBits() & NS_FRAME_PART_OF_IBSPLIT),
|
||
"anonymous ib-split block shouldn't have border/background");
|
||
bSize += f->BSize(wm);
|
||
}
|
||
(wm.IsVertical() ? borderArea.width : borderArea.height) += bSize;
|
||
bSize = 0;
|
||
f = aFrame->GetPrevContinuation();
|
||
for (; f; f = f->GetPrevContinuation()) {
|
||
MOZ_ASSERT(!(f->GetStateBits() & NS_FRAME_PART_OF_IBSPLIT),
|
||
"anonymous ib-split block shouldn't have border/background");
|
||
bSize += f->BSize(wm);
|
||
}
|
||
(wm.IsVertical() ? borderArea.x : borderArea.y) -= bSize;
|
||
(wm.IsVertical() ? borderArea.width : borderArea.height) += bSize;
|
||
return borderArea;
|
||
}
|
||
|
||
/**
|
||
* Inflate aBorderArea which is relative to aFrame's origin to calculate
|
||
* a hypothetical non-split frame area for all the continuations.
|
||
* See "Joining Boxes for 'slice'" in
|
||
* http://dev.w3.org/csswg/css-break/#break-decoration
|
||
*/
|
||
enum InlineBoxOrder { eForBorder, eForBackground };
|
||
static nsRect
|
||
JoinBoxesForSlice(nsIFrame* aFrame, const nsRect& aBorderArea,
|
||
InlineBoxOrder aOrder)
|
||
{
|
||
if (static_cast<nsInlineFrame*>(do_QueryFrame(aFrame))) {
|
||
return (aOrder == eForBorder
|
||
? gInlineBGData->GetBorderContinuousRect(aFrame, aBorderArea)
|
||
: gInlineBGData->GetContinuousRect(aFrame)) +
|
||
aBorderArea.TopLeft();
|
||
}
|
||
return JoinBoxesForBlockAxisSlice(aFrame, aBorderArea);
|
||
}
|
||
|
||
static bool
|
||
IsBoxDecorationSlice(const nsStyleBorder& aStyleBorder)
|
||
{
|
||
return aStyleBorder.mBoxDecorationBreak == StyleBoxDecorationBreak::Slice;
|
||
}
|
||
|
||
static nsRect
|
||
BoxDecorationRectForBorder(nsIFrame* aFrame, const nsRect& aBorderArea,
|
||
Sides aSkipSides,
|
||
const nsStyleBorder* aStyleBorder = nullptr)
|
||
{
|
||
if (!aStyleBorder) {
|
||
aStyleBorder = aFrame->StyleBorder();
|
||
}
|
||
// If aSkipSides.IsEmpty() then there are no continuations, or it's
|
||
// a ::first-letter that wants all border sides on the first continuation.
|
||
return ::IsBoxDecorationSlice(*aStyleBorder) && !aSkipSides.IsEmpty()
|
||
? ::JoinBoxesForSlice(aFrame, aBorderArea, eForBorder)
|
||
: aBorderArea;
|
||
}
|
||
|
||
static nsRect
|
||
BoxDecorationRectForBackground(nsIFrame* aFrame, const nsRect& aBorderArea,
|
||
Sides aSkipSides,
|
||
const nsStyleBorder* aStyleBorder = nullptr)
|
||
{
|
||
if (!aStyleBorder) {
|
||
aStyleBorder = aFrame->StyleBorder();
|
||
}
|
||
// If aSkipSides.IsEmpty() then there are no continuations, or it's
|
||
// a ::first-letter that wants all border sides on the first continuation.
|
||
return ::IsBoxDecorationSlice(*aStyleBorder) && !aSkipSides.IsEmpty()
|
||
? ::JoinBoxesForSlice(aFrame, aBorderArea, eForBackground)
|
||
: aBorderArea;
|
||
}
|
||
|
||
//----------------------------------------------------------------------
|
||
// Thebes Border Rendering Code Start
|
||
|
||
/*
|
||
* Compute the float-pixel radii that should be used for drawing
|
||
* this border/outline, given the various input bits.
|
||
*/
|
||
/* static */ void
|
||
nsCSSRendering::ComputePixelRadii(const nscoord *aAppUnitsRadii,
|
||
nscoord aAppUnitsPerPixel,
|
||
RectCornerRadii *oBorderRadii)
|
||
{
|
||
Float radii[8];
|
||
NS_FOR_CSS_HALF_CORNERS(corner)
|
||
radii[corner] = Float(aAppUnitsRadii[corner]) / aAppUnitsPerPixel;
|
||
|
||
(*oBorderRadii)[C_TL] = Size(radii[eCornerTopLeftX],
|
||
radii[eCornerTopLeftY]);
|
||
(*oBorderRadii)[C_TR] = Size(radii[eCornerTopRightX],
|
||
radii[eCornerTopRightY]);
|
||
(*oBorderRadii)[C_BR] = Size(radii[eCornerBottomRightX],
|
||
radii[eCornerBottomRightY]);
|
||
(*oBorderRadii)[C_BL] = Size(radii[eCornerBottomLeftX],
|
||
radii[eCornerBottomLeftY]);
|
||
}
|
||
|
||
DrawResult
|
||
nsCSSRendering::PaintBorder(nsPresContext* aPresContext,
|
||
gfxContext& aRenderingContext,
|
||
nsIFrame* aForFrame,
|
||
const nsRect& aDirtyRect,
|
||
const nsRect& aBorderArea,
|
||
nsStyleContext* aStyleContext,
|
||
PaintBorderFlags aFlags,
|
||
Sides aSkipSides)
|
||
{
|
||
AUTO_PROFILER_LABEL("nsCSSRendering::PaintBorder", GRAPHICS);
|
||
|
||
nsStyleContext *styleIfVisited = aStyleContext->GetStyleIfVisited();
|
||
const nsStyleBorder *styleBorder = aStyleContext->StyleBorder();
|
||
// Don't check RelevantLinkVisited here, since we want to take the
|
||
// same amount of time whether or not it's true.
|
||
if (!styleIfVisited) {
|
||
return PaintBorderWithStyleBorder(aPresContext, aRenderingContext, aForFrame,
|
||
aDirtyRect, aBorderArea, *styleBorder,
|
||
aStyleContext, aFlags, aSkipSides);
|
||
}
|
||
|
||
nsStyleBorder newStyleBorder(*styleBorder);
|
||
|
||
NS_FOR_CSS_SIDES(side) {
|
||
nscolor color = aStyleContext->
|
||
GetVisitedDependentColor(nsStyleBorder::BorderColorFieldFor(side));
|
||
newStyleBorder.mBorderColor[side] = StyleComplexColor::FromColor(color);
|
||
}
|
||
return PaintBorderWithStyleBorder(aPresContext, aRenderingContext, aForFrame,
|
||
aDirtyRect, aBorderArea, newStyleBorder,
|
||
aStyleContext, aFlags, aSkipSides);
|
||
}
|
||
|
||
Maybe<nsCSSBorderRenderer>
|
||
nsCSSRendering::CreateBorderRenderer(nsPresContext* aPresContext,
|
||
DrawTarget* aDrawTarget,
|
||
nsIFrame* aForFrame,
|
||
const nsRect& aDirtyRect,
|
||
const nsRect& aBorderArea,
|
||
nsStyleContext* aStyleContext,
|
||
Sides aSkipSides)
|
||
{
|
||
nsStyleContext *styleIfVisited = aStyleContext->GetStyleIfVisited();
|
||
const nsStyleBorder *styleBorder = aStyleContext->StyleBorder();
|
||
// Don't check RelevantLinkVisited here, since we want to take the
|
||
// same amount of time whether or not it's true.
|
||
if (!styleIfVisited) {
|
||
return CreateBorderRendererWithStyleBorder(aPresContext, aDrawTarget,
|
||
aForFrame, aDirtyRect,
|
||
aBorderArea, *styleBorder,
|
||
aStyleContext, aSkipSides);
|
||
}
|
||
|
||
nsStyleBorder newStyleBorder(*styleBorder);
|
||
|
||
NS_FOR_CSS_SIDES(side) {
|
||
nscolor color = aStyleContext->
|
||
GetVisitedDependentColor(nsStyleBorder::BorderColorFieldFor(side));
|
||
newStyleBorder.mBorderColor[side] = StyleComplexColor::FromColor(color);
|
||
}
|
||
return CreateBorderRendererWithStyleBorder(aPresContext, aDrawTarget,
|
||
aForFrame, aDirtyRect, aBorderArea,
|
||
newStyleBorder, aStyleContext,
|
||
aSkipSides);
|
||
}
|
||
|
||
nsCSSBorderRenderer
|
||
ConstructBorderRenderer(nsPresContext* aPresContext,
|
||
nsStyleContext* aStyleContext,
|
||
DrawTarget* aDrawTarget,
|
||
nsIFrame* aForFrame,
|
||
const nsRect& aDirtyRect,
|
||
const nsRect& aBorderArea,
|
||
const nsStyleBorder& aStyleBorder,
|
||
Sides aSkipSides,
|
||
bool* aNeedsClip)
|
||
{
|
||
nsMargin border = aStyleBorder.GetComputedBorder();
|
||
|
||
// Get our style context's color struct.
|
||
const nsStyleColor* ourColor = aStyleContext->StyleColor();
|
||
|
||
// In NavQuirks mode we want to use the parent's context as a starting point
|
||
// for determining the background color.
|
||
bool quirks = aPresContext->CompatibilityMode() == eCompatibility_NavQuirks;
|
||
nsIFrame* bgFrame = nsCSSRendering::FindNonTransparentBackgroundFrame(aForFrame, quirks);
|
||
nsStyleContext* bgContext = bgFrame->StyleContext();
|
||
nscolor bgColor = bgContext->
|
||
GetVisitedDependentColor(&nsStyleBackground::mBackgroundColor);
|
||
|
||
// Compute the outermost boundary of the area that might be painted.
|
||
// Same coordinate space as aBorderArea & aBGClipRect.
|
||
nsRect joinedBorderArea =
|
||
::BoxDecorationRectForBorder(aForFrame, aBorderArea, aSkipSides, &aStyleBorder);
|
||
RectCornerRadii bgRadii;
|
||
::GetRadii(aForFrame, aStyleBorder, aBorderArea, joinedBorderArea, &bgRadii);
|
||
|
||
PrintAsFormatString(" joinedBorderArea: %d %d %d %d\n", joinedBorderArea.x, joinedBorderArea.y,
|
||
joinedBorderArea.width, joinedBorderArea.height);
|
||
|
||
// start drawing
|
||
if (::IsBoxDecorationSlice(aStyleBorder)) {
|
||
if (joinedBorderArea.IsEqualEdges(aBorderArea)) {
|
||
// No need for a clip, just skip the sides we don't want.
|
||
border.ApplySkipSides(aSkipSides);
|
||
} else {
|
||
// We're drawing borders around the joined continuation boxes so we need
|
||
// to clip that to the slice that we want for this frame.
|
||
*aNeedsClip = true;
|
||
}
|
||
} else {
|
||
MOZ_ASSERT(joinedBorderArea.IsEqualEdges(aBorderArea),
|
||
"Should use aBorderArea for box-decoration-break:clone");
|
||
MOZ_ASSERT(aForFrame->GetSkipSides().IsEmpty() ||
|
||
IS_TRUE_OVERFLOW_CONTAINER(aForFrame),
|
||
"Should not skip sides for box-decoration-break:clone except "
|
||
"::first-letter/line continuations or other frame types that "
|
||
"don't have borders but those shouldn't reach this point. "
|
||
"Overflow containers do reach this point though.");
|
||
border.ApplySkipSides(aSkipSides);
|
||
}
|
||
|
||
// Convert to dev pixels.
|
||
nscoord twipsPerPixel = aPresContext->DevPixelsToAppUnits(1);
|
||
Rect joinedBorderAreaPx = NSRectToRect(joinedBorderArea, twipsPerPixel);
|
||
Float borderWidths[4] = { Float(border.top) / twipsPerPixel,
|
||
Float(border.right) / twipsPerPixel,
|
||
Float(border.bottom) / twipsPerPixel,
|
||
Float(border.left) / twipsPerPixel };
|
||
Rect dirtyRect = NSRectToRect(aDirtyRect, twipsPerPixel);
|
||
|
||
uint8_t borderStyles[4];
|
||
nscolor borderColors[4];
|
||
nsBorderColors* compositeColors[4];
|
||
|
||
// pull out styles, colors, composite colors
|
||
NS_FOR_CSS_SIDES (i) {
|
||
borderStyles[i] = aStyleBorder.GetBorderStyle(i);
|
||
borderColors[i] = ourColor->CalcComplexColor(aStyleBorder.mBorderColor[i]);
|
||
aStyleBorder.GetCompositeColors(i, &compositeColors[i]);
|
||
}
|
||
|
||
PrintAsFormatString(" borderStyles: %d %d %d %d\n", borderStyles[0], borderStyles[1], borderStyles[2], borderStyles[3]);
|
||
|
||
nsIDocument* document = nullptr;
|
||
nsIContent* content = aForFrame->GetContent();
|
||
if (content) {
|
||
document = content->OwnerDoc();
|
||
}
|
||
|
||
return nsCSSBorderRenderer(aPresContext,
|
||
document,
|
||
aDrawTarget,
|
||
dirtyRect,
|
||
joinedBorderAreaPx,
|
||
borderStyles,
|
||
borderWidths,
|
||
bgRadii,
|
||
borderColors,
|
||
compositeColors,
|
||
bgColor);
|
||
}
|
||
|
||
|
||
DrawResult
|
||
nsCSSRendering::PaintBorderWithStyleBorder(nsPresContext* aPresContext,
|
||
gfxContext& aRenderingContext,
|
||
nsIFrame* aForFrame,
|
||
const nsRect& aDirtyRect,
|
||
const nsRect& aBorderArea,
|
||
const nsStyleBorder& aStyleBorder,
|
||
nsStyleContext* aStyleContext,
|
||
PaintBorderFlags aFlags,
|
||
Sides aSkipSides)
|
||
{
|
||
DrawTarget& aDrawTarget = *aRenderingContext.GetDrawTarget();
|
||
|
||
PrintAsStringNewline("++ PaintBorder");
|
||
|
||
// Check to see if we have an appearance defined. If so, we let the theme
|
||
// renderer draw the border. DO not get the data from aForFrame, since the passed in style context
|
||
// may be different! Always use |aStyleContext|!
|
||
const nsStyleDisplay* displayData = aStyleContext->StyleDisplay();
|
||
if (displayData->mAppearance) {
|
||
nsITheme *theme = aPresContext->GetTheme();
|
||
if (theme &&
|
||
theme->ThemeSupportsWidget(aPresContext, aForFrame,
|
||
displayData->mAppearance)) {
|
||
return DrawResult::SUCCESS; // Let the theme handle it.
|
||
}
|
||
}
|
||
|
||
if (!aStyleBorder.mBorderImageSource.IsEmpty()) {
|
||
DrawResult result = DrawResult::SUCCESS;
|
||
|
||
uint32_t irFlags = 0;
|
||
if (aFlags & PaintBorderFlags::SYNC_DECODE_IMAGES) {
|
||
irFlags |= nsImageRenderer::FLAG_SYNC_DECODE_IMAGES;
|
||
}
|
||
|
||
// Creating the border image renderer will request a decode, and we rely on
|
||
// that happening.
|
||
Maybe<nsCSSBorderImageRenderer> renderer =
|
||
nsCSSBorderImageRenderer::CreateBorderImageRenderer(aPresContext, aForFrame, aBorderArea,
|
||
aStyleBorder, aDirtyRect, aSkipSides,
|
||
irFlags, &result);
|
||
// renderer was created successfully, which means border image is ready to
|
||
// be used.
|
||
if (renderer) {
|
||
MOZ_ASSERT(result == DrawResult::SUCCESS);
|
||
return renderer->DrawBorderImage(aPresContext, aRenderingContext,
|
||
aForFrame, aDirtyRect);
|
||
}
|
||
}
|
||
|
||
DrawResult result = DrawResult::SUCCESS;
|
||
|
||
// If we had a border-image, but it wasn't loaded, then we should return
|
||
// DrawResult::NOT_READY; we'll want to try again if we do a paint with sync
|
||
// decoding enabled.
|
||
if (aStyleBorder.mBorderImageSource.GetType() != eStyleImageType_Null) {
|
||
result = DrawResult::NOT_READY;
|
||
}
|
||
|
||
nsMargin border = aStyleBorder.GetComputedBorder();
|
||
if (0 == border.left && 0 == border.right &&
|
||
0 == border.top && 0 == border.bottom) {
|
||
// Empty border area
|
||
return result;
|
||
}
|
||
|
||
bool needsClip = false;
|
||
nsCSSBorderRenderer br = ConstructBorderRenderer(aPresContext,
|
||
aStyleContext,
|
||
&aDrawTarget,
|
||
aForFrame,
|
||
aDirtyRect,
|
||
aBorderArea,
|
||
aStyleBorder,
|
||
aSkipSides,
|
||
&needsClip);
|
||
if (needsClip) {
|
||
aDrawTarget.PushClipRect(
|
||
NSRectToSnappedRect(aBorderArea,
|
||
aForFrame->PresContext()->AppUnitsPerDevPixel(),
|
||
aDrawTarget));
|
||
}
|
||
|
||
br.DrawBorders();
|
||
|
||
if (needsClip) {
|
||
aDrawTarget.PopClip();
|
||
}
|
||
|
||
PrintAsStringNewline();
|
||
|
||
return result;
|
||
}
|
||
|
||
Maybe<nsCSSBorderRenderer>
|
||
nsCSSRendering::CreateBorderRendererWithStyleBorder(nsPresContext* aPresContext,
|
||
DrawTarget* aDrawTarget,
|
||
nsIFrame* aForFrame,
|
||
const nsRect& aDirtyRect,
|
||
const nsRect& aBorderArea,
|
||
const nsStyleBorder& aStyleBorder,
|
||
nsStyleContext* aStyleContext,
|
||
Sides aSkipSides)
|
||
{
|
||
const nsStyleDisplay* displayData = aStyleContext->StyleDisplay();
|
||
if (displayData->mAppearance) {
|
||
nsITheme *theme = aPresContext->GetTheme();
|
||
if (theme &&
|
||
theme->ThemeSupportsWidget(aPresContext, aForFrame,
|
||
displayData->mAppearance)) {
|
||
return Nothing();
|
||
}
|
||
}
|
||
|
||
if (aStyleBorder.mBorderImageSource.GetType() != eStyleImageType_Null) {
|
||
return Nothing();
|
||
}
|
||
|
||
nsMargin border = aStyleBorder.GetComputedBorder();
|
||
if (0 == border.left && 0 == border.right &&
|
||
0 == border.top && 0 == border.bottom) {
|
||
// Empty border area
|
||
return Nothing();
|
||
}
|
||
|
||
bool needsClip = false;
|
||
nsCSSBorderRenderer br = ConstructBorderRenderer(aPresContext,
|
||
aStyleContext,
|
||
aDrawTarget,
|
||
aForFrame,
|
||
aDirtyRect,
|
||
aBorderArea,
|
||
aStyleBorder,
|
||
aSkipSides,
|
||
&needsClip);
|
||
if (needsClip) {
|
||
return Nothing();
|
||
}
|
||
return Some(br);
|
||
}
|
||
|
||
static nsRect
|
||
GetOutlineInnerRect(nsIFrame* aFrame)
|
||
{
|
||
nsRect* savedOutlineInnerRect =
|
||
aFrame->GetProperty(nsIFrame::OutlineInnerRectProperty());
|
||
if (savedOutlineInnerRect)
|
||
return *savedOutlineInnerRect;
|
||
NS_NOTREACHED("we should have saved a frame property");
|
||
return nsRect(nsPoint(0, 0), aFrame->GetSize());
|
||
}
|
||
|
||
Maybe<nsCSSBorderRenderer>
|
||
nsCSSRendering::CreateBorderRendererForOutline(nsPresContext* aPresContext,
|
||
gfxContext* aRenderingContext,
|
||
nsIFrame* aForFrame,
|
||
const nsRect& aDirtyRect,
|
||
const nsRect& aBorderArea,
|
||
nsStyleContext* aStyleContext)
|
||
{
|
||
nscoord twipsRadii[8];
|
||
|
||
// Get our style context's color struct.
|
||
const nsStyleOutline* ourOutline = aStyleContext->StyleOutline();
|
||
|
||
if (!ourOutline->ShouldPaintOutline()) {
|
||
// Empty outline
|
||
return Nothing();
|
||
}
|
||
|
||
nsIFrame* bgFrame = nsCSSRendering::FindNonTransparentBackgroundFrame
|
||
(aForFrame, false);
|
||
nsStyleContext* bgContext = bgFrame->StyleContext();
|
||
nscolor bgColor = bgContext->
|
||
GetVisitedDependentColor(&nsStyleBackground::mBackgroundColor);
|
||
|
||
nsRect innerRect;
|
||
if (
|
||
#ifdef MOZ_XUL
|
||
aStyleContext->GetPseudoType() == CSSPseudoElementType::XULTree
|
||
#else
|
||
false
|
||
#endif
|
||
) {
|
||
innerRect = aBorderArea;
|
||
} else {
|
||
innerRect = GetOutlineInnerRect(aForFrame) + aBorderArea.TopLeft();
|
||
}
|
||
nscoord offset = ourOutline->mOutlineOffset;
|
||
innerRect.Inflate(offset, offset);
|
||
// If the dirty rect is completely inside the border area (e.g., only the
|
||
// content is being painted), then we can skip out now
|
||
// XXX this isn't exactly true for rounded borders, where the inside curves may
|
||
// encroach into the content area. A safer calculation would be to
|
||
// shorten insideRect by the radius one each side before performing this test.
|
||
if (innerRect.Contains(aDirtyRect))
|
||
return Nothing();
|
||
|
||
nscoord width = ourOutline->GetOutlineWidth();
|
||
|
||
nsRect outerRect = innerRect;
|
||
outerRect.Inflate(width, width);
|
||
|
||
// get the radius for our outline
|
||
nsIFrame::ComputeBorderRadii(ourOutline->mOutlineRadius, aBorderArea.Size(),
|
||
outerRect.Size(), Sides(), twipsRadii);
|
||
|
||
// Get our conversion values
|
||
nscoord twipsPerPixel = aPresContext->DevPixelsToAppUnits(1);
|
||
|
||
// get the outer rectangles
|
||
Rect oRect(NSRectToRect(outerRect, twipsPerPixel));
|
||
|
||
// convert the radii
|
||
nsMargin outlineMargin(width, width, width, width);
|
||
RectCornerRadii outlineRadii;
|
||
ComputePixelRadii(twipsRadii, twipsPerPixel, &outlineRadii);
|
||
|
||
uint8_t outlineStyle = ourOutline->mOutlineStyle;
|
||
if (outlineStyle == NS_STYLE_BORDER_STYLE_AUTO) {
|
||
if (nsLayoutUtils::IsOutlineStyleAutoEnabled()) {
|
||
nsITheme* theme = aPresContext->GetTheme();
|
||
if (theme && theme->ThemeSupportsWidget(aPresContext, aForFrame,
|
||
NS_THEME_FOCUS_OUTLINE)) {
|
||
theme->DrawWidgetBackground(aRenderingContext, aForFrame,
|
||
NS_THEME_FOCUS_OUTLINE, innerRect,
|
||
aDirtyRect);
|
||
return Nothing();
|
||
}
|
||
}
|
||
if (width == 0) {
|
||
return Nothing(); // empty outline
|
||
}
|
||
// http://dev.w3.org/csswg/css-ui/#outline
|
||
// "User agents may treat 'auto' as 'solid'."
|
||
outlineStyle = NS_STYLE_BORDER_STYLE_SOLID;
|
||
}
|
||
|
||
uint8_t outlineStyles[4] = { outlineStyle, outlineStyle,
|
||
outlineStyle, outlineStyle };
|
||
|
||
// This handles treating the initial color as 'currentColor'; if we
|
||
// ever want 'invert' back we'll need to do a bit of work here too.
|
||
nscolor outlineColor =
|
||
aStyleContext->GetVisitedDependentColor(&nsStyleOutline::mOutlineColor);
|
||
nscolor outlineColors[4] = { outlineColor,
|
||
outlineColor,
|
||
outlineColor,
|
||
outlineColor };
|
||
|
||
// convert the border widths
|
||
Float outlineWidths[4] = { Float(width) / twipsPerPixel,
|
||
Float(width) / twipsPerPixel,
|
||
Float(width) / twipsPerPixel,
|
||
Float(width) / twipsPerPixel };
|
||
Rect dirtyRect = NSRectToRect(aDirtyRect, twipsPerPixel);
|
||
|
||
nsIDocument* document = nullptr;
|
||
nsIContent* content = aForFrame->GetContent();
|
||
if (content) {
|
||
document = content->OwnerDoc();
|
||
}
|
||
|
||
DrawTarget* dt = aRenderingContext ? aRenderingContext->GetDrawTarget() : nullptr;
|
||
nsCSSBorderRenderer br(aPresContext,
|
||
document,
|
||
dt,
|
||
dirtyRect,
|
||
oRect,
|
||
outlineStyles,
|
||
outlineWidths,
|
||
outlineRadii,
|
||
outlineColors,
|
||
nullptr,
|
||
bgColor);
|
||
|
||
return Some(br);
|
||
}
|
||
|
||
void
|
||
nsCSSRendering::PaintOutline(nsPresContext* aPresContext,
|
||
gfxContext& aRenderingContext,
|
||
nsIFrame* aForFrame,
|
||
const nsRect& aDirtyRect,
|
||
const nsRect& aBorderArea,
|
||
nsStyleContext* aStyleContext)
|
||
{
|
||
Maybe<nsCSSBorderRenderer> br = CreateBorderRendererForOutline(aPresContext,
|
||
&aRenderingContext,
|
||
aForFrame,
|
||
aDirtyRect,
|
||
aBorderArea,
|
||
aStyleContext);
|
||
if (!br) {
|
||
return;
|
||
}
|
||
|
||
// start drawing
|
||
br->DrawBorders();
|
||
|
||
PrintAsStringNewline();
|
||
}
|
||
|
||
void
|
||
nsCSSRendering::PaintFocus(nsPresContext* aPresContext,
|
||
DrawTarget* aDrawTarget,
|
||
const nsRect& aFocusRect,
|
||
nscolor aColor)
|
||
{
|
||
nscoord oneCSSPixel = nsPresContext::CSSPixelsToAppUnits(1);
|
||
nscoord oneDevPixel = aPresContext->DevPixelsToAppUnits(1);
|
||
|
||
Rect focusRect(NSRectToRect(aFocusRect, oneDevPixel));
|
||
|
||
RectCornerRadii focusRadii;
|
||
{
|
||
nscoord twipsRadii[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
|
||
ComputePixelRadii(twipsRadii, oneDevPixel, &focusRadii);
|
||
}
|
||
Float focusWidths[4] = { Float(oneCSSPixel) / oneDevPixel,
|
||
Float(oneCSSPixel) / oneDevPixel,
|
||
Float(oneCSSPixel) / oneDevPixel,
|
||
Float(oneCSSPixel) / oneDevPixel };
|
||
|
||
uint8_t focusStyles[4] = { NS_STYLE_BORDER_STYLE_DOTTED,
|
||
NS_STYLE_BORDER_STYLE_DOTTED,
|
||
NS_STYLE_BORDER_STYLE_DOTTED,
|
||
NS_STYLE_BORDER_STYLE_DOTTED };
|
||
nscolor focusColors[4] = { aColor, aColor, aColor, aColor };
|
||
|
||
// Because this renders a dotted border, the background color
|
||
// should not be used. Therefore, we provide a value that will
|
||
// be blatantly wrong if it ever does get used. (If this becomes
|
||
// something that CSS can style, this function will then have access
|
||
// to a style context and can use the same logic that PaintBorder
|
||
// and PaintOutline do.)
|
||
nsCSSBorderRenderer br(aPresContext,
|
||
nullptr,
|
||
aDrawTarget,
|
||
focusRect,
|
||
focusRect,
|
||
focusStyles,
|
||
focusWidths,
|
||
focusRadii,
|
||
focusColors,
|
||
nullptr,
|
||
NS_RGB(255, 0, 0));
|
||
br.DrawBorders();
|
||
|
||
PrintAsStringNewline();
|
||
}
|
||
|
||
// Thebes Border Rendering Code End
|
||
//----------------------------------------------------------------------
|
||
|
||
|
||
//----------------------------------------------------------------------
|
||
|
||
/**
|
||
* Helper for ComputeObjectAnchorPoint; parameters are the same as for
|
||
* that function, except they're for a single coordinate / a single size
|
||
* dimension. (so, x/width vs. y/height)
|
||
*/
|
||
static void
|
||
ComputeObjectAnchorCoord(const Position::Coord& aCoord,
|
||
const nscoord aOriginBounds,
|
||
const nscoord aImageSize,
|
||
nscoord* aTopLeftCoord,
|
||
nscoord* aAnchorPointCoord)
|
||
{
|
||
*aAnchorPointCoord = aCoord.mLength;
|
||
*aTopLeftCoord = aCoord.mLength;
|
||
|
||
if (aCoord.mHasPercent) {
|
||
// Adjust aTopLeftCoord by the specified % of the extra space.
|
||
nscoord extraSpace = aOriginBounds - aImageSize;
|
||
*aTopLeftCoord += NSToCoordRound(aCoord.mPercent * extraSpace);
|
||
|
||
// The anchor-point doesn't care about our image's size; just the size
|
||
// of the region we're rendering into.
|
||
*aAnchorPointCoord += NSToCoordRound(aCoord.mPercent * aOriginBounds);
|
||
}
|
||
}
|
||
|
||
void
|
||
nsImageRenderer::ComputeObjectAnchorPoint(
|
||
const Position& aPos,
|
||
const nsSize& aOriginBounds,
|
||
const nsSize& aImageSize,
|
||
nsPoint* aTopLeft,
|
||
nsPoint* aAnchorPoint)
|
||
{
|
||
ComputeObjectAnchorCoord(aPos.mXPosition,
|
||
aOriginBounds.width, aImageSize.width,
|
||
&aTopLeft->x, &aAnchorPoint->x);
|
||
|
||
ComputeObjectAnchorCoord(aPos.mYPosition,
|
||
aOriginBounds.height, aImageSize.height,
|
||
&aTopLeft->y, &aAnchorPoint->y);
|
||
}
|
||
|
||
nsIFrame*
|
||
nsCSSRendering::FindNonTransparentBackgroundFrame(nsIFrame* aFrame,
|
||
bool aStartAtParent /*= false*/)
|
||
{
|
||
NS_ASSERTION(aFrame, "Cannot find NonTransparentBackgroundFrame in a null frame");
|
||
|
||
nsIFrame* frame = nullptr;
|
||
if (aStartAtParent) {
|
||
frame = nsLayoutUtils::GetParentOrPlaceholderFor(aFrame);
|
||
}
|
||
if (!frame) {
|
||
frame = aFrame;
|
||
}
|
||
|
||
while (frame) {
|
||
// No need to call GetVisitedDependentColor because it always uses
|
||
// this alpha component anyway.
|
||
if (NS_GET_A(frame->StyleBackground()->BackgroundColor(frame)) > 0) {
|
||
break;
|
||
}
|
||
|
||
if (frame->IsThemed())
|
||
break;
|
||
|
||
nsIFrame* parent = nsLayoutUtils::GetParentOrPlaceholderFor(frame);
|
||
if (!parent)
|
||
break;
|
||
|
||
frame = parent;
|
||
}
|
||
return frame;
|
||
}
|
||
|
||
// Returns true if aFrame is a canvas frame.
|
||
// We need to treat the viewport as canvas because, even though
|
||
// it does not actually paint a background, we need to get the right
|
||
// background style so we correctly detect transparent documents.
|
||
bool
|
||
nsCSSRendering::IsCanvasFrame(nsIFrame* aFrame)
|
||
{
|
||
LayoutFrameType frameType = aFrame->Type();
|
||
return frameType == LayoutFrameType::Canvas ||
|
||
frameType == LayoutFrameType::Root ||
|
||
frameType == LayoutFrameType::PageContent ||
|
||
frameType == LayoutFrameType::Viewport;
|
||
}
|
||
|
||
nsIFrame*
|
||
nsCSSRendering::FindBackgroundStyleFrame(nsIFrame* aForFrame)
|
||
{
|
||
const nsStyleBackground* result = aForFrame->StyleBackground();
|
||
|
||
// Check if we need to do propagation from BODY rather than HTML.
|
||
if (!result->IsTransparent(aForFrame)) {
|
||
return aForFrame;
|
||
}
|
||
|
||
nsIContent* content = aForFrame->GetContent();
|
||
// The root element content can't be null. We wouldn't know what
|
||
// frame to create for aFrame.
|
||
// Use |OwnerDoc| so it works during destruction.
|
||
if (!content) {
|
||
return aForFrame;
|
||
}
|
||
|
||
nsIDocument* document = content->OwnerDoc();
|
||
|
||
dom::Element* bodyContent = document->GetBodyElement();
|
||
// We need to null check the body node (bug 118829) since
|
||
// there are cases, thanks to the fix for bug 5569, where we
|
||
// will reflow a document with no body. In particular, if a
|
||
// SCRIPT element in the head blocks the parser and then has a
|
||
// SCRIPT that does "document.location.href = 'foo'", then
|
||
// nsParser::Terminate will call |DidBuildModel| methods
|
||
// through to the content sink, which will call |StartLayout|
|
||
// and thus |Initialize| on the pres shell. See bug 119351
|
||
// for the ugly details.
|
||
if (!bodyContent) {
|
||
return aForFrame;
|
||
}
|
||
|
||
nsIFrame *bodyFrame = bodyContent->GetPrimaryFrame();
|
||
if (!bodyFrame) {
|
||
return aForFrame;
|
||
}
|
||
|
||
return nsLayoutUtils::GetStyleFrame(bodyFrame);
|
||
}
|
||
|
||
/**
|
||
* |FindBackground| finds the correct style data to use to paint the
|
||
* background. It is responsible for handling the following two
|
||
* statements in section 14.2 of CSS2:
|
||
*
|
||
* The background of the box generated by the root element covers the
|
||
* entire canvas.
|
||
*
|
||
* For HTML documents, however, we recommend that authors specify the
|
||
* background for the BODY element rather than the HTML element. User
|
||
* agents should observe the following precedence rules to fill in the
|
||
* background: if the value of the 'background' property for the HTML
|
||
* element is different from 'transparent' then use it, else use the
|
||
* value of the 'background' property for the BODY element. If the
|
||
* resulting value is 'transparent', the rendering is undefined.
|
||
*
|
||
* Thus, in our implementation, it is responsible for ensuring that:
|
||
* + we paint the correct background on the |nsCanvasFrame|,
|
||
* |nsRootBoxFrame|, or |nsPageFrame|,
|
||
* + we don't paint the background on the root element, and
|
||
* + we don't paint the background on the BODY element in *some* cases,
|
||
* and for SGML-based HTML documents only.
|
||
*
|
||
* |FindBackground| returns true if a background should be painted, and
|
||
* the resulting style context to use for the background information
|
||
* will be filled in to |aBackground|.
|
||
*/
|
||
nsStyleContext*
|
||
nsCSSRendering::FindRootFrameBackground(nsIFrame* aForFrame)
|
||
{
|
||
return FindBackgroundStyleFrame(aForFrame)->StyleContext();
|
||
}
|
||
|
||
inline bool
|
||
FindElementBackground(nsIFrame* aForFrame, nsIFrame* aRootElementFrame,
|
||
nsStyleContext** aBackgroundSC)
|
||
{
|
||
if (aForFrame == aRootElementFrame) {
|
||
// We must have propagated our background to the viewport or canvas. Abort.
|
||
return false;
|
||
}
|
||
|
||
*aBackgroundSC = aForFrame->StyleContext();
|
||
|
||
// Return true unless the frame is for a BODY element whose background
|
||
// was propagated to the viewport.
|
||
|
||
nsIContent* content = aForFrame->GetContent();
|
||
if (!content || content->NodeInfo()->NameAtom() != nsGkAtoms::body)
|
||
return true; // not frame for a "body" element
|
||
// It could be a non-HTML "body" element but that's OK, we'd fail the
|
||
// bodyContent check below
|
||
|
||
if (aForFrame->StyleContext()->GetPseudo())
|
||
return true; // A pseudo-element frame.
|
||
|
||
// We should only look at the <html> background if we're in an HTML document
|
||
nsIDocument* document = content->OwnerDoc();
|
||
|
||
dom::Element* bodyContent = document->GetBodyElement();
|
||
if (bodyContent != content)
|
||
return true; // this wasn't the background that was propagated
|
||
|
||
// This can be called even when there's no root element yet, during frame
|
||
// construction, via nsLayoutUtils::FrameHasTransparency and
|
||
// nsContainerFrame::SyncFrameViewProperties.
|
||
if (!aRootElementFrame)
|
||
return true;
|
||
|
||
const nsStyleBackground* htmlBG = aRootElementFrame->StyleBackground();
|
||
return !htmlBG->IsTransparent(aRootElementFrame);
|
||
}
|
||
|
||
bool
|
||
nsCSSRendering::FindBackground(nsIFrame* aForFrame,
|
||
nsStyleContext** aBackgroundSC)
|
||
{
|
||
nsIFrame* rootElementFrame =
|
||
aForFrame->PresContext()->PresShell()->FrameConstructor()->GetRootElementStyleFrame();
|
||
if (IsCanvasFrame(aForFrame)) {
|
||
*aBackgroundSC = FindCanvasBackground(aForFrame, rootElementFrame);
|
||
return true;
|
||
} else {
|
||
return FindElementBackground(aForFrame, rootElementFrame, aBackgroundSC);
|
||
}
|
||
}
|
||
|
||
void
|
||
nsCSSRendering::BeginFrameTreesLocked()
|
||
{
|
||
++gFrameTreeLockCount;
|
||
}
|
||
|
||
void
|
||
nsCSSRendering::EndFrameTreesLocked()
|
||
{
|
||
NS_ASSERTION(gFrameTreeLockCount > 0, "Unbalanced EndFrameTreeLocked");
|
||
--gFrameTreeLockCount;
|
||
if (gFrameTreeLockCount == 0) {
|
||
gInlineBGData->Reset();
|
||
}
|
||
}
|
||
|
||
bool
|
||
nsCSSRendering::HasBoxShadowNativeTheme(nsIFrame* aFrame,
|
||
bool& aMaybeHasBorderRadius)
|
||
{
|
||
const nsStyleDisplay* styleDisplay = aFrame->StyleDisplay();
|
||
nsITheme::Transparency transparency;
|
||
if (aFrame->IsThemed(styleDisplay, &transparency)) {
|
||
aMaybeHasBorderRadius = false;
|
||
// For opaque (rectangular) theme widgets we can take the generic
|
||
// border-box path with border-radius disabled.
|
||
return transparency != nsITheme::eOpaque;
|
||
}
|
||
|
||
aMaybeHasBorderRadius = true;
|
||
return false;
|
||
}
|
||
|
||
gfx::Color
|
||
nsCSSRendering::GetShadowColor(nsCSSShadowItem* aShadow,
|
||
nsIFrame* aFrame,
|
||
float aOpacity)
|
||
{
|
||
// Get the shadow color; if not specified, use the foreground color
|
||
nscolor shadowColor;
|
||
if (aShadow->mHasColor)
|
||
shadowColor = aShadow->mColor;
|
||
else
|
||
shadowColor = aFrame->StyleColor()->mColor;
|
||
|
||
Color color = Color::FromABGR(shadowColor);
|
||
color.a *= aOpacity;
|
||
return color;
|
||
}
|
||
|
||
nsRect
|
||
nsCSSRendering::GetShadowRect(const nsRect aFrameArea,
|
||
bool aNativeTheme,
|
||
nsIFrame* aForFrame)
|
||
{
|
||
nsRect frameRect = aNativeTheme ?
|
||
aForFrame->GetVisualOverflowRectRelativeToSelf() + aFrameArea.TopLeft() :
|
||
aFrameArea;
|
||
Sides skipSides = aForFrame->GetSkipSides();
|
||
frameRect = ::BoxDecorationRectForBorder(aForFrame, frameRect, skipSides);
|
||
|
||
// Explicitly do not need to account for the spread radius here
|
||
// Webrender does it for us or PaintBoxShadow will for non-WR
|
||
return frameRect;
|
||
}
|
||
|
||
bool
|
||
nsCSSRendering::GetBorderRadii(const nsRect& aFrameRect,
|
||
const nsRect& aBorderRect,
|
||
nsIFrame* aFrame,
|
||
RectCornerRadii& aOutRadii)
|
||
{
|
||
const nscoord twipsPerPixel = aFrame->PresContext()->DevPixelsToAppUnits(1);
|
||
nscoord twipsRadii[8];
|
||
NS_ASSERTION(aBorderRect.Size() == aFrame->VisualBorderRectRelativeToSelf().Size(),
|
||
"unexpected size");
|
||
nsSize sz = aFrameRect.Size();
|
||
bool hasBorderRadius = aFrame->GetBorderRadii(sz, sz, Sides(), twipsRadii);
|
||
if (hasBorderRadius) {
|
||
ComputePixelRadii(twipsRadii, twipsPerPixel, &aOutRadii);
|
||
}
|
||
|
||
return hasBorderRadius;
|
||
}
|
||
|
||
void
|
||
nsCSSRendering::PaintBoxShadowOuter(nsPresContext* aPresContext,
|
||
gfxContext& aRenderingContext,
|
||
nsIFrame* aForFrame,
|
||
const nsRect& aFrameArea,
|
||
const nsRect& aDirtyRect,
|
||
float aOpacity)
|
||
{
|
||
DrawTarget& aDrawTarget = *aRenderingContext.GetDrawTarget();
|
||
nsCSSShadowArray* shadows = aForFrame->StyleEffects()->mBoxShadow;
|
||
if (!shadows)
|
||
return;
|
||
|
||
bool hasBorderRadius;
|
||
// mutually exclusive with hasBorderRadius
|
||
bool nativeTheme = HasBoxShadowNativeTheme(aForFrame, hasBorderRadius);
|
||
const nsStyleDisplay* styleDisplay = aForFrame->StyleDisplay();
|
||
|
||
nsRect frameRect = GetShadowRect(aFrameArea, nativeTheme, aForFrame);
|
||
|
||
// Get any border radius, since box-shadow must also have rounded corners if
|
||
// the frame does.
|
||
RectCornerRadii borderRadii;
|
||
const nscoord twipsPerPixel = aPresContext->DevPixelsToAppUnits(1);
|
||
if (hasBorderRadius) {
|
||
nscoord twipsRadii[8];
|
||
NS_ASSERTION(aFrameArea.Size() == aForFrame->VisualBorderRectRelativeToSelf().Size(),
|
||
"unexpected size");
|
||
nsSize sz = frameRect.Size();
|
||
hasBorderRadius = aForFrame->GetBorderRadii(sz, sz, Sides(), twipsRadii);
|
||
if (hasBorderRadius) {
|
||
ComputePixelRadii(twipsRadii, twipsPerPixel, &borderRadii);
|
||
}
|
||
}
|
||
|
||
|
||
// We don't show anything that intersects with the frame we're blurring on. So tell the
|
||
// blurrer not to do unnecessary work there.
|
||
gfxRect skipGfxRect = ThebesRect(NSRectToRect(frameRect, twipsPerPixel));
|
||
skipGfxRect.Round();
|
||
bool useSkipGfxRect = true;
|
||
if (nativeTheme) {
|
||
// Optimize non-leaf native-themed frames by skipping computing pixels
|
||
// in the padding-box. We assume the padding-box is going to be painted
|
||
// opaquely for non-leaf frames.
|
||
// XXX this may not be a safe assumption; we should make this go away
|
||
// by optimizing box-shadow drawing more for the cases where we don't have a skip-rect.
|
||
useSkipGfxRect = !aForFrame->IsLeaf();
|
||
nsRect paddingRect =
|
||
aForFrame->GetPaddingRect() - aForFrame->GetPosition() + aFrameArea.TopLeft();
|
||
skipGfxRect = nsLayoutUtils::RectToGfxRect(paddingRect, twipsPerPixel);
|
||
} else if (hasBorderRadius) {
|
||
skipGfxRect.Deflate(gfxMargin(
|
||
std::max(borderRadii[C_TL].height, borderRadii[C_TR].height), 0,
|
||
std::max(borderRadii[C_BL].height, borderRadii[C_BR].height), 0));
|
||
}
|
||
|
||
|
||
for (uint32_t i = shadows->Length(); i > 0; --i) {
|
||
nsCSSShadowItem* shadowItem = shadows->ShadowAt(i - 1);
|
||
if (shadowItem->mInset)
|
||
continue;
|
||
|
||
nsRect shadowRect = frameRect;
|
||
shadowRect.MoveBy(shadowItem->mXOffset, shadowItem->mYOffset);
|
||
if (!nativeTheme) {
|
||
shadowRect.Inflate(shadowItem->mSpread, shadowItem->mSpread);
|
||
}
|
||
|
||
// shadowRect won't include the blur, so make an extra rect here that includes the blur
|
||
// for use in the even-odd rule below.
|
||
nsRect shadowRectPlusBlur = shadowRect;
|
||
nscoord blurRadius = shadowItem->mRadius;
|
||
shadowRectPlusBlur.Inflate(
|
||
nsContextBoxBlur::GetBlurRadiusMargin(blurRadius, twipsPerPixel));
|
||
|
||
Rect shadowGfxRectPlusBlur =
|
||
NSRectToRect(shadowRectPlusBlur, twipsPerPixel);
|
||
shadowGfxRectPlusBlur.RoundOut();
|
||
MaybeSnapToDevicePixels(shadowGfxRectPlusBlur, aDrawTarget, true);
|
||
|
||
Color gfxShadowColor = GetShadowColor(shadowItem, aForFrame, aOpacity);
|
||
|
||
if (nativeTheme) {
|
||
nsContextBoxBlur blurringArea;
|
||
|
||
// When getting the widget shape from the native theme, we're going
|
||
// to draw the widget into the shadow surface to create a mask.
|
||
// We need to ensure that there actually *is* a shadow surface
|
||
// and that we're not going to draw directly into aRenderingContext.
|
||
gfxContext* shadowContext =
|
||
blurringArea.Init(shadowRect, shadowItem->mSpread, blurRadius,
|
||
twipsPerPixel, &aRenderingContext, aDirtyRect,
|
||
useSkipGfxRect ? &skipGfxRect : nullptr,
|
||
nsContextBoxBlur::FORCE_MASK);
|
||
if (!shadowContext)
|
||
continue;
|
||
|
||
MOZ_ASSERT(shadowContext == blurringArea.GetContext());
|
||
|
||
aRenderingContext.Save();
|
||
aRenderingContext.SetColor(gfxShadowColor);
|
||
|
||
// Draw the shape of the frame so it can be blurred. Recall how nsContextBoxBlur
|
||
// doesn't make any temporary surfaces if blur is 0 and it just returns the original
|
||
// surface? If we have no blur, we're painting this fill on the actual content surface
|
||
// (aRenderingContext == shadowContext) which is why we set up the color and clip
|
||
// before doing this.
|
||
|
||
// We don't clip the border-box from the shadow, nor any other box.
|
||
// We assume that the native theme is going to paint over the shadow.
|
||
|
||
// Draw the widget shape
|
||
gfxContextMatrixAutoSaveRestore save(shadowContext);
|
||
gfxPoint devPixelOffset =
|
||
nsLayoutUtils::PointToGfxPoint(nsPoint(shadowItem->mXOffset,
|
||
shadowItem->mYOffset),
|
||
aPresContext->AppUnitsPerDevPixel());
|
||
shadowContext->SetMatrix(
|
||
shadowContext->CurrentMatrix().PreTranslate(devPixelOffset));
|
||
|
||
nsRect nativeRect = aDirtyRect;
|
||
nativeRect.MoveBy(-nsPoint(shadowItem->mXOffset, shadowItem->mYOffset));
|
||
nativeRect.IntersectRect(frameRect, nativeRect);
|
||
aPresContext->GetTheme()->DrawWidgetBackground(shadowContext, aForFrame,
|
||
styleDisplay->mAppearance, aFrameArea, nativeRect);
|
||
|
||
blurringArea.DoPaint();
|
||
aRenderingContext.Restore();
|
||
} else {
|
||
aRenderingContext.Save();
|
||
|
||
{
|
||
Rect innerClipRect = NSRectToRect(frameRect, twipsPerPixel);
|
||
if (!MaybeSnapToDevicePixels(innerClipRect, aDrawTarget, true)) {
|
||
innerClipRect.Round();
|
||
}
|
||
|
||
// Clip out the interior of the frame's border edge so that the shadow
|
||
// is only painted outside that area.
|
||
RefPtr<PathBuilder> builder =
|
||
aDrawTarget.CreatePathBuilder(FillRule::FILL_EVEN_ODD);
|
||
AppendRectToPath(builder, shadowGfxRectPlusBlur);
|
||
if (hasBorderRadius) {
|
||
AppendRoundedRectToPath(builder, innerClipRect, borderRadii);
|
||
} else {
|
||
AppendRectToPath(builder, innerClipRect);
|
||
}
|
||
RefPtr<Path> path = builder->Finish();
|
||
aRenderingContext.Clip(path);
|
||
}
|
||
|
||
// Clip the shadow so that we only get the part that applies to aForFrame.
|
||
nsRect fragmentClip = shadowRectPlusBlur;
|
||
Sides skipSides = aForFrame->GetSkipSides();
|
||
if (!skipSides.IsEmpty()) {
|
||
if (skipSides.Left()) {
|
||
nscoord xmost = fragmentClip.XMost();
|
||
fragmentClip.x = aFrameArea.x;
|
||
fragmentClip.width = xmost - fragmentClip.x;
|
||
}
|
||
if (skipSides.Right()) {
|
||
nscoord xmost = fragmentClip.XMost();
|
||
nscoord overflow = xmost - aFrameArea.XMost();
|
||
if (overflow > 0) {
|
||
fragmentClip.width -= overflow;
|
||
}
|
||
}
|
||
if (skipSides.Top()) {
|
||
nscoord ymost = fragmentClip.YMost();
|
||
fragmentClip.y = aFrameArea.y;
|
||
fragmentClip.height = ymost - fragmentClip.y;
|
||
}
|
||
if (skipSides.Bottom()) {
|
||
nscoord ymost = fragmentClip.YMost();
|
||
nscoord overflow = ymost - aFrameArea.YMost();
|
||
if (overflow > 0) {
|
||
fragmentClip.height -= overflow;
|
||
}
|
||
}
|
||
}
|
||
fragmentClip = fragmentClip.Intersect(aDirtyRect);
|
||
aRenderingContext.
|
||
Clip(NSRectToSnappedRect(fragmentClip,
|
||
aForFrame->PresContext()->AppUnitsPerDevPixel(),
|
||
aDrawTarget));
|
||
|
||
RectCornerRadii clipRectRadii;
|
||
if (hasBorderRadius) {
|
||
Float spreadDistance = Float(shadowItem->mSpread) / twipsPerPixel;
|
||
|
||
Float borderSizes[4];
|
||
|
||
borderSizes[eSideLeft] = spreadDistance;
|
||
borderSizes[eSideTop] = spreadDistance;
|
||
borderSizes[eSideRight] = spreadDistance;
|
||
borderSizes[eSideBottom] = spreadDistance;
|
||
|
||
nsCSSBorderRenderer::ComputeOuterRadii(borderRadii, borderSizes,
|
||
&clipRectRadii);
|
||
|
||
}
|
||
nsContextBoxBlur::BlurRectangle(&aRenderingContext,
|
||
shadowRect,
|
||
twipsPerPixel,
|
||
hasBorderRadius ? &clipRectRadii : nullptr,
|
||
blurRadius,
|
||
gfxShadowColor,
|
||
aDirtyRect,
|
||
skipGfxRect);
|
||
aRenderingContext.Restore();
|
||
}
|
||
|
||
}
|
||
}
|
||
|
||
nsRect
|
||
nsCSSRendering::GetBoxShadowInnerPaddingRect(nsIFrame* aFrame,
|
||
const nsRect& aFrameArea)
|
||
{
|
||
Sides skipSides = aFrame->GetSkipSides();
|
||
nsRect frameRect =
|
||
::BoxDecorationRectForBorder(aFrame, aFrameArea, skipSides);
|
||
|
||
nsRect paddingRect = frameRect;
|
||
nsMargin border = aFrame->GetUsedBorder();
|
||
paddingRect.Deflate(border);
|
||
return paddingRect;
|
||
}
|
||
|
||
bool
|
||
nsCSSRendering::ShouldPaintBoxShadowInner(nsIFrame* aFrame)
|
||
{
|
||
nsCSSShadowArray* shadows = aFrame->StyleEffects()->mBoxShadow;
|
||
if (!shadows)
|
||
return false;
|
||
|
||
if (aFrame->IsThemed() && aFrame->GetContent() &&
|
||
!nsContentUtils::IsChromeDoc(aFrame->GetContent()->GetUncomposedDoc())) {
|
||
// There's no way of getting hold of a shape corresponding to a
|
||
// "padding-box" for native-themed widgets, so just don't draw
|
||
// inner box-shadows for them. But we allow chrome to paint inner
|
||
// box shadows since chrome can be aware of the platform theme.
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
bool
|
||
nsCSSRendering::GetShadowInnerRadii(nsIFrame* aFrame,
|
||
const nsRect& aFrameArea,
|
||
RectCornerRadii& aOutInnerRadii)
|
||
{
|
||
// Get any border radius, since box-shadow must also have rounded corners
|
||
// if the frame does.
|
||
nscoord twipsRadii[8];
|
||
nsRect frameRect =
|
||
::BoxDecorationRectForBorder(aFrame, aFrameArea, aFrame->GetSkipSides());
|
||
nsSize sz = frameRect.Size();
|
||
nsMargin border = aFrame->GetUsedBorder();
|
||
bool hasBorderRadius = aFrame->GetBorderRadii(sz, sz, Sides(), twipsRadii);
|
||
const nscoord twipsPerPixel = aFrame->PresContext()->DevPixelsToAppUnits(1);
|
||
|
||
RectCornerRadii borderRadii;
|
||
|
||
hasBorderRadius = GetBorderRadii(frameRect, aFrameArea, aFrame, borderRadii);
|
||
if (hasBorderRadius) {
|
||
ComputePixelRadii(twipsRadii, twipsPerPixel, &borderRadii);
|
||
|
||
Float borderSizes[4] = {
|
||
Float(border.top) / twipsPerPixel,
|
||
Float(border.right) / twipsPerPixel,
|
||
Float(border.bottom) / twipsPerPixel,
|
||
Float(border.left) / twipsPerPixel
|
||
};
|
||
nsCSSBorderRenderer::ComputeInnerRadii(borderRadii,
|
||
borderSizes,
|
||
&aOutInnerRadii);
|
||
}
|
||
|
||
return hasBorderRadius;
|
||
}
|
||
|
||
void
|
||
nsCSSRendering::PaintBoxShadowInner(nsPresContext* aPresContext,
|
||
gfxContext& aRenderingContext,
|
||
nsIFrame* aForFrame,
|
||
const nsRect& aFrameArea)
|
||
{
|
||
if (!ShouldPaintBoxShadowInner(aForFrame)) {
|
||
return;
|
||
}
|
||
|
||
nsCSSShadowArray* shadows = aForFrame->StyleEffects()->mBoxShadow;
|
||
NS_ASSERTION(aForFrame->IsFieldSetFrame() ||
|
||
aFrameArea.Size() == aForFrame->GetSize(), "unexpected size");
|
||
|
||
nsRect paddingRect = GetBoxShadowInnerPaddingRect(aForFrame, aFrameArea);
|
||
|
||
RectCornerRadii innerRadii;
|
||
bool hasBorderRadius = GetShadowInnerRadii(aForFrame,
|
||
aFrameArea,
|
||
innerRadii);
|
||
|
||
const nscoord twipsPerPixel = aPresContext->DevPixelsToAppUnits(1);
|
||
|
||
for (uint32_t i = shadows->Length(); i > 0; --i) {
|
||
nsCSSShadowItem* shadowItem = shadows->ShadowAt(i - 1);
|
||
if (!shadowItem->mInset)
|
||
continue;
|
||
|
||
// shadowPaintRect: the area to paint on the temp surface
|
||
// shadowClipRect: the area on the temporary surface within shadowPaintRect
|
||
// that we will NOT paint in
|
||
nscoord blurRadius = shadowItem->mRadius;
|
||
nsMargin blurMargin =
|
||
nsContextBoxBlur::GetBlurRadiusMargin(blurRadius, twipsPerPixel);
|
||
nsRect shadowPaintRect = paddingRect;
|
||
shadowPaintRect.Inflate(blurMargin);
|
||
|
||
// Round the spread radius to device pixels (by truncation).
|
||
// This mostly matches what we do for borders, except that we don't round
|
||
// up values between zero and one device pixels to one device pixel.
|
||
// This way of rounding is symmetric around zero, which makes sense for
|
||
// the spread radius.
|
||
int32_t spreadDistance = shadowItem->mSpread / twipsPerPixel;
|
||
nscoord spreadDistanceAppUnits = aPresContext->DevPixelsToAppUnits(spreadDistance);
|
||
|
||
nsRect shadowClipRect = paddingRect;
|
||
shadowClipRect.MoveBy(shadowItem->mXOffset, shadowItem->mYOffset);
|
||
shadowClipRect.Deflate(spreadDistanceAppUnits, spreadDistanceAppUnits);
|
||
|
||
Rect shadowClipGfxRect = NSRectToRect(shadowClipRect, twipsPerPixel);
|
||
shadowClipGfxRect.Round();
|
||
|
||
RectCornerRadii clipRectRadii;
|
||
if (hasBorderRadius) {
|
||
// Calculate the radii the inner clipping rect will have
|
||
Float borderSizes[4] = {0, 0, 0, 0};
|
||
|
||
// See PaintBoxShadowOuter and bug 514670
|
||
if (innerRadii[C_TL].width > 0 || innerRadii[C_BL].width > 0) {
|
||
borderSizes[eSideLeft] = spreadDistance;
|
||
}
|
||
|
||
if (innerRadii[C_TL].height > 0 || innerRadii[C_TR].height > 0) {
|
||
borderSizes[eSideTop] = spreadDistance;
|
||
}
|
||
|
||
if (innerRadii[C_TR].width > 0 || innerRadii[C_BR].width > 0) {
|
||
borderSizes[eSideRight] = spreadDistance;
|
||
}
|
||
|
||
if (innerRadii[C_BL].height > 0 || innerRadii[C_BR].height > 0) {
|
||
borderSizes[eSideBottom] = spreadDistance;
|
||
}
|
||
|
||
nsCSSBorderRenderer::ComputeInnerRadii(innerRadii, borderSizes,
|
||
&clipRectRadii);
|
||
}
|
||
|
||
// Set the "skip rect" to the area within the frame that we don't paint in,
|
||
// including after blurring.
|
||
nsRect skipRect = shadowClipRect;
|
||
skipRect.Deflate(blurMargin);
|
||
gfxRect skipGfxRect = nsLayoutUtils::RectToGfxRect(skipRect, twipsPerPixel);
|
||
if (hasBorderRadius) {
|
||
skipGfxRect.Deflate(gfxMargin(
|
||
std::max(clipRectRadii[C_TL].height, clipRectRadii[C_TR].height), 0,
|
||
std::max(clipRectRadii[C_BL].height, clipRectRadii[C_BR].height), 0));
|
||
}
|
||
|
||
// When there's a blur radius, gfxAlphaBoxBlur leaves the skiprect area
|
||
// unchanged. And by construction the gfxSkipRect is not touched by the
|
||
// rendered shadow (even after blurring), so those pixels must be completely
|
||
// transparent in the shadow, so drawing them changes nothing.
|
||
DrawTarget* drawTarget = aRenderingContext.GetDrawTarget();
|
||
|
||
// Clip the context to the area of the frame's padding rect, so no part of the
|
||
// shadow is painted outside. Also cut out anything beyond where the inset shadow
|
||
// will be.
|
||
Rect shadowGfxRect = NSRectToRect(paddingRect, twipsPerPixel);
|
||
shadowGfxRect.Round();
|
||
|
||
Color shadowColor = GetShadowColor(shadowItem, aForFrame, 1.0);
|
||
aRenderingContext.Save();
|
||
|
||
// This clips the outside border radius.
|
||
// clipRectRadii is the border radius inside the inset shadow.
|
||
if (hasBorderRadius) {
|
||
RefPtr<Path> roundedRect =
|
||
MakePathForRoundedRect(*drawTarget, shadowGfxRect, innerRadii);
|
||
aRenderingContext.Clip(roundedRect);
|
||
} else {
|
||
aRenderingContext.Clip(shadowGfxRect);
|
||
}
|
||
|
||
nsContextBoxBlur insetBoxBlur;
|
||
gfxRect destRect = nsLayoutUtils::RectToGfxRect(shadowPaintRect, twipsPerPixel);
|
||
Point shadowOffset(shadowItem->mXOffset / twipsPerPixel,
|
||
shadowItem->mYOffset / twipsPerPixel);
|
||
|
||
insetBoxBlur.InsetBoxBlur(&aRenderingContext, ToRect(destRect),
|
||
shadowClipGfxRect, shadowColor,
|
||
blurRadius, spreadDistanceAppUnits,
|
||
twipsPerPixel, hasBorderRadius,
|
||
clipRectRadii, ToRect(skipGfxRect),
|
||
shadowOffset);
|
||
aRenderingContext.Restore();
|
||
}
|
||
}
|
||
|
||
/* static */
|
||
nsCSSRendering::PaintBGParams
|
||
nsCSSRendering::PaintBGParams::ForAllLayers(nsPresContext& aPresCtx,
|
||
const nsRect& aDirtyRect,
|
||
const nsRect& aBorderArea,
|
||
nsIFrame *aFrame,
|
||
uint32_t aPaintFlags,
|
||
float aOpacity)
|
||
{
|
||
MOZ_ASSERT(aFrame);
|
||
|
||
PaintBGParams result(aPresCtx, aDirtyRect, aBorderArea,
|
||
aFrame, aPaintFlags, -1, CompositionOp::OP_OVER,
|
||
aOpacity);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* static */
|
||
nsCSSRendering::PaintBGParams
|
||
nsCSSRendering::PaintBGParams::ForSingleLayer(nsPresContext& aPresCtx,
|
||
const nsRect& aDirtyRect,
|
||
const nsRect& aBorderArea,
|
||
nsIFrame *aFrame,
|
||
uint32_t aPaintFlags,
|
||
int32_t aLayer,
|
||
CompositionOp aCompositionOp,
|
||
float aOpacity)
|
||
{
|
||
MOZ_ASSERT(aFrame && (aLayer != -1));
|
||
|
||
PaintBGParams result(aPresCtx, aDirtyRect, aBorderArea,
|
||
aFrame, aPaintFlags, aLayer, aCompositionOp,
|
||
aOpacity);
|
||
|
||
return result;
|
||
}
|
||
|
||
DrawResult
|
||
nsCSSRendering::PaintStyleImageLayer(const PaintBGParams& aParams,
|
||
gfxContext& aRenderingCtx)
|
||
{
|
||
AUTO_PROFILER_LABEL("nsCSSRendering::PaintStyleImageLayer", GRAPHICS);
|
||
|
||
NS_PRECONDITION(aParams.frame,
|
||
"Frame is expected to be provided to PaintStyleImageLayer");
|
||
|
||
nsStyleContext *sc;
|
||
if (!FindBackground(aParams.frame, &sc)) {
|
||
// We don't want to bail out if moz-appearance is set on a root
|
||
// node. If it has a parent content node, bail because it's not
|
||
// a root, otherwise keep going in order to let the theme stuff
|
||
// draw the background. The canvas really should be drawing the
|
||
// bg, but there's no way to hook that up via css.
|
||
if (!aParams.frame->StyleDisplay()->mAppearance) {
|
||
return DrawResult::SUCCESS;
|
||
}
|
||
|
||
nsIContent* content = aParams.frame->GetContent();
|
||
if (!content || content->GetParent()) {
|
||
return DrawResult::SUCCESS;
|
||
}
|
||
|
||
sc = aParams.frame->StyleContext();
|
||
}
|
||
|
||
return PaintStyleImageLayerWithSC(aParams, aRenderingCtx, sc, *aParams.frame->StyleBorder());
|
||
}
|
||
|
||
bool
|
||
nsCSSRendering::CanBuildWebRenderDisplayItemsForStyleImageLayer(LayerManager* aManager,
|
||
nsPresContext& aPresCtx,
|
||
nsIFrame *aFrame,
|
||
const nsStyleBackground* aBackgroundStyle,
|
||
int32_t aLayer)
|
||
{
|
||
if (!aBackgroundStyle) {
|
||
return false;
|
||
}
|
||
|
||
MOZ_ASSERT(aFrame &&
|
||
aLayer >= 0 &&
|
||
(uint32_t)aLayer < aBackgroundStyle->mImage.mLayers.Length());
|
||
|
||
// We cannot draw native themed backgrounds
|
||
const nsStyleDisplay* displayData = aFrame->StyleDisplay();
|
||
if (displayData->mAppearance) {
|
||
nsITheme *theme = aPresCtx.GetTheme();
|
||
if (theme && theme->ThemeSupportsWidget(&aPresCtx,
|
||
aFrame,
|
||
displayData->mAppearance)) {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
// We only support painting gradients and image for a single style image layer
|
||
const nsStyleImage* styleImage = &aBackgroundStyle->mImage.mLayers[aLayer].mImage;
|
||
if (styleImage->GetType() == eStyleImageType_Image) {
|
||
if (styleImage->GetCropRect()) {
|
||
return false;
|
||
}
|
||
|
||
imgRequestProxy* requestProxy = styleImage->GetImageData();
|
||
if (!requestProxy) {
|
||
return false;
|
||
}
|
||
|
||
nsCOMPtr<imgIContainer> srcImage;
|
||
requestProxy->GetImage(getter_AddRefs(srcImage));
|
||
if (!srcImage || !srcImage->IsImageContainerAvailable(aManager, imgIContainer::FLAG_NONE)) {
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
if (styleImage->GetType() == eStyleImageType_Gradient) {
|
||
return true;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
DrawResult
|
||
nsCSSRendering::BuildWebRenderDisplayItemsForStyleImageLayer(const PaintBGParams& aParams,
|
||
mozilla::wr::DisplayListBuilder& aBuilder,
|
||
const mozilla::layers::StackingContextHelper& aSc,
|
||
nsTArray<WebRenderParentCommand>& aParentCommands,
|
||
mozilla::layers::WebRenderDisplayItemLayer* aLayer,
|
||
mozilla::layers::WebRenderLayerManager* aManager,
|
||
nsDisplayItem* aItem)
|
||
{
|
||
NS_PRECONDITION(aParams.frame,
|
||
"Frame is expected to be provided to BuildWebRenderDisplayItemsForStyleImageLayer");
|
||
|
||
nsStyleContext *sc;
|
||
if (!FindBackground(aParams.frame, &sc)) {
|
||
// We don't want to bail out if moz-appearance is set on a root
|
||
// node. If it has a parent content node, bail because it's not
|
||
// a root, otherwise keep going in order to let the theme stuff
|
||
// draw the background. The canvas really should be drawing the
|
||
// bg, but there's no way to hook that up via css.
|
||
if (!aParams.frame->StyleDisplay()->mAppearance) {
|
||
return DrawResult::SUCCESS;
|
||
}
|
||
|
||
nsIContent* content = aParams.frame->GetContent();
|
||
if (!content || content->GetParent()) {
|
||
return DrawResult::SUCCESS;
|
||
}
|
||
|
||
sc = aParams.frame->StyleContext();
|
||
}
|
||
return BuildWebRenderDisplayItemsForStyleImageLayerWithSC(aParams, aBuilder, aSc, aParentCommands,
|
||
aLayer, aManager, aItem,
|
||
sc, *aParams.frame->StyleBorder());
|
||
}
|
||
|
||
static bool
|
||
IsOpaqueBorderEdge(const nsStyleBorder& aBorder, mozilla::Side aSide)
|
||
{
|
||
if (aBorder.GetComputedBorder().Side(aSide) == 0)
|
||
return true;
|
||
switch (aBorder.GetBorderStyle(aSide)) {
|
||
case NS_STYLE_BORDER_STYLE_SOLID:
|
||
case NS_STYLE_BORDER_STYLE_GROOVE:
|
||
case NS_STYLE_BORDER_STYLE_RIDGE:
|
||
case NS_STYLE_BORDER_STYLE_INSET:
|
||
case NS_STYLE_BORDER_STYLE_OUTSET:
|
||
break;
|
||
default:
|
||
return false;
|
||
}
|
||
|
||
// If we're using a border image, assume it's not fully opaque,
|
||
// because we may not even have the image loaded at this point, and
|
||
// even if we did, checking whether the relevant tile is fully
|
||
// opaque would be too much work.
|
||
if (aBorder.mBorderImageSource.GetType() != eStyleImageType_Null)
|
||
return false;
|
||
|
||
StyleComplexColor color = aBorder.mBorderColor[aSide];
|
||
// We don't know the foreground color here, so if it's being used
|
||
// we must assume it might be transparent.
|
||
if (!color.IsNumericColor()) {
|
||
return false;
|
||
}
|
||
return NS_GET_A(color.mColor) == 255;
|
||
}
|
||
|
||
/**
|
||
* Returns true if all border edges are either missing or opaque.
|
||
*/
|
||
static bool
|
||
IsOpaqueBorder(const nsStyleBorder& aBorder)
|
||
{
|
||
if (aBorder.mBorderColors)
|
||
return false;
|
||
NS_FOR_CSS_SIDES(i) {
|
||
if (!IsOpaqueBorderEdge(aBorder, i))
|
||
return false;
|
||
}
|
||
return true;
|
||
}
|
||
|
||
static inline void
|
||
SetupDirtyRects(const nsRect& aBGClipArea, const nsRect& aCallerDirtyRect,
|
||
nscoord aAppUnitsPerPixel,
|
||
/* OUT: */
|
||
nsRect* aDirtyRect, gfxRect* aDirtyRectGfx)
|
||
{
|
||
aDirtyRect->IntersectRect(aBGClipArea, aCallerDirtyRect);
|
||
|
||
// Compute the Thebes equivalent of the dirtyRect.
|
||
*aDirtyRectGfx = nsLayoutUtils::RectToGfxRect(*aDirtyRect, aAppUnitsPerPixel);
|
||
NS_WARNING_ASSERTION(aDirtyRect->IsEmpty() || !aDirtyRectGfx->IsEmpty(),
|
||
"converted dirty rect should not be empty");
|
||
MOZ_ASSERT(!aDirtyRect->IsEmpty() || aDirtyRectGfx->IsEmpty(),
|
||
"second should be empty if first is");
|
||
}
|
||
|
||
static bool
|
||
IsSVGStyleGeometryBox(StyleGeometryBox aBox)
|
||
{
|
||
return (aBox == StyleGeometryBox::FillBox ||
|
||
aBox == StyleGeometryBox::StrokeBox ||
|
||
aBox == StyleGeometryBox::ViewBox);
|
||
}
|
||
|
||
static bool
|
||
IsHTMLStyleGeometryBox(StyleGeometryBox aBox)
|
||
{
|
||
return (aBox == StyleGeometryBox::ContentBox ||
|
||
aBox == StyleGeometryBox::PaddingBox ||
|
||
aBox == StyleGeometryBox::BorderBox ||
|
||
aBox == StyleGeometryBox::MarginBox);
|
||
}
|
||
|
||
static StyleGeometryBox
|
||
ComputeBoxValue(nsIFrame* aForFrame, StyleGeometryBox aBox)
|
||
{
|
||
if (!(aForFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT)) {
|
||
// For elements with associated CSS layout box, the values fill-box,
|
||
// stroke-box and view-box compute to the initial value of mask-clip.
|
||
if (IsSVGStyleGeometryBox(aBox)) {
|
||
return StyleGeometryBox::BorderBox;
|
||
}
|
||
} else {
|
||
// For SVG elements without associated CSS layout box, the values
|
||
// content-box, padding-box, border-box and margin-box compute to fill-box.
|
||
if (IsHTMLStyleGeometryBox(aBox)) {
|
||
return StyleGeometryBox::FillBox;
|
||
}
|
||
}
|
||
|
||
return aBox;
|
||
}
|
||
|
||
bool
|
||
nsCSSRendering::ImageLayerClipState::IsValid() const
|
||
{
|
||
// mDirtyRectInDevPx comes from mDirtyRectInAppUnits. mDirtyRectInAppUnits
|
||
// can not be empty if mDirtyRectInDevPx is not.
|
||
if (!mDirtyRectInDevPx.IsEmpty() && mDirtyRectInAppUnits.IsEmpty()) {
|
||
return false;
|
||
}
|
||
|
||
if (mHasRoundedCorners == mClippedRadii.IsEmpty()) {
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* static */ void
|
||
nsCSSRendering::GetImageLayerClip(const nsStyleImageLayers::Layer& aLayer,
|
||
nsIFrame* aForFrame, const nsStyleBorder& aBorder,
|
||
const nsRect& aBorderArea, const nsRect& aCallerDirtyRect,
|
||
bool aWillPaintBorder, nscoord aAppUnitsPerPixel,
|
||
/* out */ ImageLayerClipState* aClipState)
|
||
{
|
||
aClipState->mHasRoundedCorners = false;
|
||
aClipState->mHasAdditionalBGClipArea = false;
|
||
aClipState->mAdditionalBGClipArea.SetEmpty();
|
||
aClipState->mCustomClip = false;
|
||
|
||
StyleGeometryBox layerClip = ComputeBoxValue(aForFrame, aLayer.mClip);
|
||
if (IsSVGStyleGeometryBox(layerClip)) {
|
||
MOZ_ASSERT(aForFrame->IsFrameOfType(nsIFrame::eSVG) &&
|
||
!aForFrame->IsSVGOuterSVGFrame());
|
||
|
||
// The coordinate space of clipArea is svg user space.
|
||
nsRect clipArea =
|
||
nsLayoutUtils::ComputeGeometryBox(aForFrame, layerClip);
|
||
|
||
nsRect strokeBox = (layerClip == StyleGeometryBox::StrokeBox)
|
||
? clipArea
|
||
: nsLayoutUtils::ComputeGeometryBox(aForFrame, StyleGeometryBox::StrokeBox);
|
||
nsRect clipAreaRelativeToStrokeBox = clipArea - strokeBox.TopLeft();
|
||
|
||
// aBorderArea is the stroke-box area in a coordinate space defined by
|
||
// the caller. This coordinate space can be svg user space of aForFrame,
|
||
// the space of aForFrame's reference-frame, or anything else.
|
||
//
|
||
// Which coordinate space chosen for aBorderArea is not matter. What
|
||
// matter is to ensure returning aClipState->mBGClipArea in the consistent
|
||
// coordiante space with aBorderArea. So we evaluate the position of clip
|
||
// area base on the position of aBorderArea here.
|
||
aClipState->mBGClipArea =
|
||
clipAreaRelativeToStrokeBox + aBorderArea.TopLeft();
|
||
|
||
SetupDirtyRects(aClipState->mBGClipArea, aCallerDirtyRect,
|
||
aAppUnitsPerPixel, &aClipState->mDirtyRectInAppUnits,
|
||
&aClipState->mDirtyRectInDevPx);
|
||
MOZ_ASSERT(aClipState->IsValid());
|
||
return;
|
||
}
|
||
|
||
if (layerClip == StyleGeometryBox::NoClip) {
|
||
aClipState->mBGClipArea = aCallerDirtyRect;
|
||
|
||
SetupDirtyRects(aClipState->mBGClipArea, aCallerDirtyRect,
|
||
aAppUnitsPerPixel, &aClipState->mDirtyRectInAppUnits,
|
||
&aClipState->mDirtyRectInDevPx);
|
||
MOZ_ASSERT(aClipState->IsValid());
|
||
return;
|
||
}
|
||
|
||
MOZ_ASSERT(!aForFrame->IsFrameOfType(nsIFrame::eSVG) ||
|
||
aForFrame->IsSVGOuterSVGFrame());
|
||
|
||
// Compute the outermost boundary of the area that might be painted.
|
||
// Same coordinate space as aBorderArea.
|
||
Sides skipSides = aForFrame->GetSkipSides();
|
||
nsRect clipBorderArea =
|
||
::BoxDecorationRectForBorder(aForFrame, aBorderArea, skipSides, &aBorder);
|
||
|
||
bool haveRoundedCorners = false;
|
||
LayoutFrameType fType = aForFrame->Type();
|
||
if (fType != LayoutFrameType::TableColGroup &&
|
||
fType != LayoutFrameType::TableCol &&
|
||
fType != LayoutFrameType::TableRow &&
|
||
fType != LayoutFrameType::TableRowGroup) {
|
||
haveRoundedCorners = GetRadii(aForFrame, aBorder, aBorderArea,
|
||
clipBorderArea, aClipState->mRadii);
|
||
}
|
||
bool isSolidBorder =
|
||
aWillPaintBorder && IsOpaqueBorder(aBorder);
|
||
if (isSolidBorder && layerClip == StyleGeometryBox::BorderBox) {
|
||
// If we have rounded corners, we need to inflate the background
|
||
// drawing area a bit to avoid seams between the border and
|
||
// background.
|
||
layerClip = haveRoundedCorners
|
||
? StyleGeometryBox::MozAlmostPadding
|
||
: StyleGeometryBox::PaddingBox;
|
||
}
|
||
|
||
aClipState->mBGClipArea = clipBorderArea;
|
||
|
||
if (aForFrame->IsScrollFrame() &&
|
||
NS_STYLE_IMAGELAYER_ATTACHMENT_LOCAL == aLayer.mAttachment) {
|
||
// As of this writing, this is still in discussion in the CSS Working Group
|
||
// http://lists.w3.org/Archives/Public/www-style/2013Jul/0250.html
|
||
|
||
// The rectangle for 'background-clip' scrolls with the content,
|
||
// but the background is also clipped at a non-scrolling 'padding-box'
|
||
// like the content. (See below.)
|
||
// Therefore, only 'content-box' makes a difference here.
|
||
if (layerClip == StyleGeometryBox::ContentBox) {
|
||
nsIScrollableFrame* scrollableFrame = do_QueryFrame(aForFrame);
|
||
// Clip at a rectangle attached to the scrolled content.
|
||
aClipState->mHasAdditionalBGClipArea = true;
|
||
aClipState->mAdditionalBGClipArea = nsRect(
|
||
aClipState->mBGClipArea.TopLeft()
|
||
+ scrollableFrame->GetScrolledFrame()->GetPosition()
|
||
// For the dir=rtl case:
|
||
+ scrollableFrame->GetScrollRange().TopLeft(),
|
||
scrollableFrame->GetScrolledRect().Size());
|
||
nsMargin padding = aForFrame->GetUsedPadding();
|
||
// padding-bottom is ignored on scrollable frames:
|
||
// https://bugzilla.mozilla.org/show_bug.cgi?id=748518
|
||
padding.bottom = 0;
|
||
padding.ApplySkipSides(skipSides);
|
||
aClipState->mAdditionalBGClipArea.Deflate(padding);
|
||
}
|
||
|
||
// Also clip at a non-scrolling, rounded-corner 'padding-box',
|
||
// same as the scrolled content because of the 'overflow' property.
|
||
layerClip = StyleGeometryBox::PaddingBox;
|
||
}
|
||
|
||
// See the comment of StyleGeometryBox::Margin.
|
||
// Hitting this assertion means we decide to turn on margin-box support for
|
||
// positioned mask from CSS parser and style system. In this case, you
|
||
// should *inflate* mBGClipArea by the margin returning from
|
||
// aForFrame->GetUsedMargin() in the code chunk bellow.
|
||
MOZ_ASSERT(layerClip != StyleGeometryBox::MarginBox,
|
||
"StyleGeometryBox::MarginBox rendering is not supported yet.\n");
|
||
|
||
if (layerClip != StyleGeometryBox::BorderBox &&
|
||
layerClip != StyleGeometryBox::Text) {
|
||
nsMargin border = aForFrame->GetUsedBorder();
|
||
if (layerClip == StyleGeometryBox::MozAlmostPadding) {
|
||
// Reduce |border| by 1px (device pixels) on all sides, if
|
||
// possible, so that we don't get antialiasing seams between the
|
||
// {background|mask} and border.
|
||
border.top = std::max(0, border.top - aAppUnitsPerPixel);
|
||
border.right = std::max(0, border.right - aAppUnitsPerPixel);
|
||
border.bottom = std::max(0, border.bottom - aAppUnitsPerPixel);
|
||
border.left = std::max(0, border.left - aAppUnitsPerPixel);
|
||
} else if (layerClip != StyleGeometryBox::PaddingBox) {
|
||
NS_ASSERTION(layerClip == StyleGeometryBox::ContentBox,
|
||
"unexpected background-clip");
|
||
border += aForFrame->GetUsedPadding();
|
||
}
|
||
border.ApplySkipSides(skipSides);
|
||
aClipState->mBGClipArea.Deflate(border);
|
||
|
||
if (haveRoundedCorners) {
|
||
nsIFrame::InsetBorderRadii(aClipState->mRadii, border);
|
||
}
|
||
}
|
||
|
||
if (haveRoundedCorners) {
|
||
auto d2a = aForFrame->PresContext()->AppUnitsPerDevPixel();
|
||
nsCSSRendering::ComputePixelRadii(aClipState->mRadii, d2a, &aClipState->mClippedRadii);
|
||
aClipState->mHasRoundedCorners = !aClipState->mClippedRadii.IsEmpty();
|
||
}
|
||
|
||
|
||
if (!haveRoundedCorners && aClipState->mHasAdditionalBGClipArea) {
|
||
// Do the intersection here to account for the fast path(?) below.
|
||
aClipState->mBGClipArea =
|
||
aClipState->mBGClipArea.Intersect(aClipState->mAdditionalBGClipArea);
|
||
aClipState->mHasAdditionalBGClipArea = false;
|
||
}
|
||
|
||
SetupDirtyRects(aClipState->mBGClipArea, aCallerDirtyRect, aAppUnitsPerPixel,
|
||
&aClipState->mDirtyRectInAppUnits,
|
||
&aClipState->mDirtyRectInDevPx);
|
||
|
||
MOZ_ASSERT(aClipState->IsValid());
|
||
}
|
||
|
||
static void
|
||
SetupImageLayerClip(nsCSSRendering::ImageLayerClipState& aClipState,
|
||
gfxContext *aCtx, nscoord aAppUnitsPerPixel,
|
||
gfxContextAutoSaveRestore* aAutoSR)
|
||
{
|
||
if (aClipState.mDirtyRectInDevPx.IsEmpty()) {
|
||
// Our caller won't draw anything under this condition, so no need
|
||
// to set more up.
|
||
return;
|
||
}
|
||
|
||
if (aClipState.mCustomClip) {
|
||
// We don't support custom clips and rounded corners, arguably a bug, but
|
||
// table painting seems to depend on it.
|
||
return;
|
||
}
|
||
|
||
// If we have rounded corners, clip all subsequent drawing to the
|
||
// rounded rectangle defined by bgArea and bgRadii (we don't know
|
||
// whether the rounded corners intrude on the dirtyRect or not).
|
||
// Do not do this if we have a caller-provided clip rect --
|
||
// as above with bgArea, arguably a bug, but table painting seems
|
||
// to depend on it.
|
||
|
||
if (aClipState.mHasAdditionalBGClipArea) {
|
||
gfxRect bgAreaGfx = nsLayoutUtils::RectToGfxRect(
|
||
aClipState.mAdditionalBGClipArea, aAppUnitsPerPixel);
|
||
bgAreaGfx.Round();
|
||
gfxUtils::ConditionRect(bgAreaGfx);
|
||
|
||
aAutoSR->EnsureSaved(aCtx);
|
||
aCtx->NewPath();
|
||
aCtx->Rectangle(bgAreaGfx, true);
|
||
aCtx->Clip();
|
||
}
|
||
|
||
if (aClipState.mHasRoundedCorners) {
|
||
Rect bgAreaGfx = NSRectToRect(aClipState.mBGClipArea, aAppUnitsPerPixel);
|
||
bgAreaGfx.Round();
|
||
|
||
if (bgAreaGfx.IsEmpty()) {
|
||
// I think it's become possible to hit this since
|
||
// https://hg.mozilla.org/mozilla-central/rev/50e934e4979b landed.
|
||
NS_WARNING("converted background area should not be empty");
|
||
// Make our caller not do anything.
|
||
aClipState.mDirtyRectInDevPx.SizeTo(gfxSize(0.0, 0.0));
|
||
return;
|
||
}
|
||
|
||
aAutoSR->EnsureSaved(aCtx);
|
||
|
||
RefPtr<Path> roundedRect =
|
||
MakePathForRoundedRect(*aCtx->GetDrawTarget(), bgAreaGfx,
|
||
aClipState.mClippedRadii);
|
||
aCtx->Clip(roundedRect);
|
||
}
|
||
}
|
||
|
||
static void
|
||
DrawBackgroundColor(nsCSSRendering::ImageLayerClipState& aClipState,
|
||
gfxContext *aCtx, nscoord aAppUnitsPerPixel)
|
||
{
|
||
if (aClipState.mDirtyRectInDevPx.IsEmpty()) {
|
||
// Our caller won't draw anything under this condition, so no need
|
||
// to set more up.
|
||
return;
|
||
}
|
||
|
||
DrawTarget* drawTarget = aCtx->GetDrawTarget();
|
||
|
||
// We don't support custom clips and rounded corners, arguably a bug, but
|
||
// table painting seems to depend on it.
|
||
if (!aClipState.mHasRoundedCorners || aClipState.mCustomClip) {
|
||
aCtx->NewPath();
|
||
aCtx->Rectangle(aClipState.mDirtyRectInDevPx, true);
|
||
aCtx->Fill();
|
||
return;
|
||
}
|
||
|
||
Rect bgAreaGfx = NSRectToRect(aClipState.mBGClipArea, aAppUnitsPerPixel);
|
||
bgAreaGfx.Round();
|
||
|
||
if (bgAreaGfx.IsEmpty()) {
|
||
// I think it's become possible to hit this since
|
||
// https://hg.mozilla.org/mozilla-central/rev/50e934e4979b landed.
|
||
NS_WARNING("converted background area should not be empty");
|
||
// Make our caller not do anything.
|
||
aClipState.mDirtyRectInDevPx.SizeTo(gfxSize(0.0, 0.0));
|
||
return;
|
||
}
|
||
|
||
aCtx->Save();
|
||
gfxRect dirty = ThebesRect(bgAreaGfx).Intersect(aClipState.mDirtyRectInDevPx);
|
||
|
||
aCtx->NewPath();
|
||
aCtx->Rectangle(dirty, true);
|
||
aCtx->Clip();
|
||
|
||
if (aClipState.mHasAdditionalBGClipArea) {
|
||
gfxRect bgAdditionalAreaGfx = nsLayoutUtils::RectToGfxRect(
|
||
aClipState.mAdditionalBGClipArea, aAppUnitsPerPixel);
|
||
bgAdditionalAreaGfx.Round();
|
||
gfxUtils::ConditionRect(bgAdditionalAreaGfx);
|
||
aCtx->NewPath();
|
||
aCtx->Rectangle(bgAdditionalAreaGfx, true);
|
||
aCtx->Clip();
|
||
}
|
||
|
||
RefPtr<Path> roundedRect =
|
||
MakePathForRoundedRect(*drawTarget, bgAreaGfx, aClipState.mClippedRadii);
|
||
aCtx->SetPath(roundedRect);
|
||
aCtx->Fill();
|
||
aCtx->Restore();
|
||
}
|
||
|
||
nscolor
|
||
nsCSSRendering::DetermineBackgroundColor(nsPresContext* aPresContext,
|
||
nsStyleContext* aStyleContext,
|
||
nsIFrame* aFrame,
|
||
bool& aDrawBackgroundImage,
|
||
bool& aDrawBackgroundColor)
|
||
{
|
||
aDrawBackgroundImage = true;
|
||
aDrawBackgroundColor = true;
|
||
|
||
const nsStyleVisibility* visibility = aStyleContext->StyleVisibility();
|
||
|
||
if (visibility->mColorAdjust != NS_STYLE_COLOR_ADJUST_EXACT &&
|
||
aFrame->HonorPrintBackgroundSettings()) {
|
||
aDrawBackgroundImage = aPresContext->GetBackgroundImageDraw();
|
||
aDrawBackgroundColor = aPresContext->GetBackgroundColorDraw();
|
||
}
|
||
|
||
const nsStyleBackground *bg = aStyleContext->StyleBackground();
|
||
nscolor bgColor;
|
||
if (aDrawBackgroundColor) {
|
||
bgColor = aStyleContext->
|
||
GetVisitedDependentColor(&nsStyleBackground::mBackgroundColor);
|
||
if (NS_GET_A(bgColor) == 0) {
|
||
aDrawBackgroundColor = false;
|
||
}
|
||
} else {
|
||
// If GetBackgroundColorDraw() is false, we are still expected to
|
||
// draw color in the background of any frame that's not completely
|
||
// transparent, but we are expected to use white instead of whatever
|
||
// color was specified.
|
||
bgColor = NS_RGB(255, 255, 255);
|
||
if (aDrawBackgroundImage || !bg->IsTransparent(aStyleContext)) {
|
||
aDrawBackgroundColor = true;
|
||
} else {
|
||
bgColor = NS_RGBA(0,0,0,0);
|
||
}
|
||
}
|
||
|
||
// We can skip painting the background color if a background image is opaque.
|
||
nsStyleImageLayers::Repeat repeat = bg->BottomLayer().mRepeat;
|
||
bool xFullRepeat = repeat.mXRepeat == StyleImageLayerRepeat::Repeat ||
|
||
repeat.mXRepeat == StyleImageLayerRepeat::Round;
|
||
bool yFullRepeat = repeat.mYRepeat == StyleImageLayerRepeat::Repeat ||
|
||
repeat.mYRepeat == StyleImageLayerRepeat::Round;
|
||
if (aDrawBackgroundColor &&
|
||
xFullRepeat && yFullRepeat &&
|
||
bg->BottomLayer().mImage.IsOpaque() &&
|
||
bg->BottomLayer().mBlendMode == NS_STYLE_BLEND_NORMAL) {
|
||
aDrawBackgroundColor = false;
|
||
}
|
||
|
||
return bgColor;
|
||
}
|
||
|
||
static CompositionOp
|
||
DetermineCompositionOp(const nsCSSRendering::PaintBGParams& aParams,
|
||
const nsStyleImageLayers& aLayers,
|
||
uint32_t aLayerIndex)
|
||
{
|
||
if (aParams.layer >= 0) {
|
||
// When drawing a single layer, use the specified composition op.
|
||
return aParams.compositionOp;
|
||
}
|
||
|
||
const nsStyleImageLayers::Layer& layer = aLayers.mLayers[aLayerIndex];
|
||
// When drawing all layers, get the compositon op from each image layer.
|
||
if (aParams.paintFlags & nsCSSRendering::PAINTBG_MASK_IMAGE) {
|
||
// Always using OP_OVER mode while drawing the bottom mask layer.
|
||
if (aLayerIndex == (aLayers.mImageCount - 1)) {
|
||
return CompositionOp::OP_OVER;
|
||
}
|
||
|
||
return nsCSSRendering::GetGFXCompositeMode(layer.mComposite);
|
||
}
|
||
|
||
return nsCSSRendering::GetGFXBlendMode(layer.mBlendMode);
|
||
}
|
||
|
||
DrawResult
|
||
nsCSSRendering::PaintStyleImageLayerWithSC(const PaintBGParams& aParams,
|
||
gfxContext& aRenderingCtx,
|
||
nsStyleContext *aBackgroundSC,
|
||
const nsStyleBorder& aBorder)
|
||
{
|
||
NS_PRECONDITION(aParams.frame,
|
||
"Frame is expected to be provided to PaintStyleImageLayerWithSC");
|
||
|
||
// If we're drawing all layers, aCompositonOp is ignored, so make sure that
|
||
// it was left at its default value.
|
||
MOZ_ASSERT(aParams.layer != -1 ||
|
||
aParams.compositionOp == CompositionOp::OP_OVER);
|
||
|
||
// Check to see if we have an appearance defined. If so, we let the theme
|
||
// renderer draw the background and bail out.
|
||
// XXXzw this ignores aParams.bgClipRect.
|
||
const nsStyleDisplay* displayData = aParams.frame->StyleDisplay();
|
||
if (displayData->mAppearance) {
|
||
nsITheme *theme = aParams.presCtx.GetTheme();
|
||
if (theme && theme->ThemeSupportsWidget(&aParams.presCtx,
|
||
aParams.frame,
|
||
displayData->mAppearance)) {
|
||
nsRect drawing(aParams.borderArea);
|
||
theme->GetWidgetOverflow(aParams.presCtx.DeviceContext(),
|
||
aParams.frame, displayData->mAppearance,
|
||
&drawing);
|
||
drawing.IntersectRect(drawing, aParams.dirtyRect);
|
||
theme->DrawWidgetBackground(&aRenderingCtx, aParams.frame,
|
||
displayData->mAppearance, aParams.borderArea,
|
||
drawing);
|
||
return DrawResult::SUCCESS;
|
||
}
|
||
}
|
||
|
||
// For canvas frames (in the CSS sense) we draw the background color using
|
||
// a solid color item that gets added in nsLayoutUtils::PaintFrame,
|
||
// or nsSubDocumentFrame::BuildDisplayList (bug 488242). (The solid
|
||
// color may be moved into nsDisplayCanvasBackground by
|
||
// nsPresShell::AddCanvasBackgroundColorItem, and painted by
|
||
// nsDisplayCanvasBackground directly.) Either way we don't need to
|
||
// paint the background color here.
|
||
bool isCanvasFrame = IsCanvasFrame(aParams.frame);
|
||
|
||
// Determine whether we are drawing background images and/or
|
||
// background colors.
|
||
bool drawBackgroundImage;
|
||
bool drawBackgroundColor;
|
||
|
||
nscolor bgColor = DetermineBackgroundColor(&aParams.presCtx,
|
||
aBackgroundSC,
|
||
aParams.frame,
|
||
drawBackgroundImage,
|
||
drawBackgroundColor);
|
||
|
||
bool paintMask = (aParams.paintFlags & PAINTBG_MASK_IMAGE);
|
||
const nsStyleImageLayers& layers = paintMask ?
|
||
aBackgroundSC->StyleSVGReset()->mMask :
|
||
aBackgroundSC->StyleBackground()->mImage;
|
||
// If we're drawing a specific layer, we don't want to draw the
|
||
// background color.
|
||
if ((drawBackgroundColor && aParams.layer >= 0) || paintMask) {
|
||
drawBackgroundColor = false;
|
||
}
|
||
|
||
// At this point, drawBackgroundImage and drawBackgroundColor are
|
||
// true if and only if we are actually supposed to paint an image or
|
||
// color into aDirtyRect, respectively.
|
||
if (!drawBackgroundImage && !drawBackgroundColor)
|
||
return DrawResult::SUCCESS;
|
||
|
||
// The 'bgClipArea' (used only by the image tiling logic, far below)
|
||
// is the caller-provided aParams.bgClipRect if any, or else the area
|
||
// determined by the value of 'background-clip' in
|
||
// SetupCurrentBackgroundClip. (Arguably it should be the
|
||
// intersection, but that breaks the table painter -- in particular,
|
||
// taking the intersection breaks reftests/bugs/403249-1[ab].)
|
||
nscoord appUnitsPerPixel = aParams.presCtx.AppUnitsPerDevPixel();
|
||
ImageLayerClipState clipState;
|
||
if (aParams.bgClipRect) {
|
||
clipState.mBGClipArea = *aParams.bgClipRect;
|
||
clipState.mCustomClip = true;
|
||
clipState.mHasRoundedCorners = false;
|
||
SetupDirtyRects(clipState.mBGClipArea, aParams.dirtyRect, appUnitsPerPixel,
|
||
&clipState.mDirtyRectInAppUnits,
|
||
&clipState.mDirtyRectInDevPx);
|
||
} else {
|
||
GetImageLayerClip(layers.BottomLayer(),
|
||
aParams.frame, aBorder, aParams.borderArea,
|
||
aParams.dirtyRect,
|
||
(aParams.paintFlags & PAINTBG_WILL_PAINT_BORDER),
|
||
appUnitsPerPixel,
|
||
&clipState);
|
||
}
|
||
|
||
// If we might be using a background color, go ahead and set it now.
|
||
if (drawBackgroundColor && !isCanvasFrame) {
|
||
aRenderingCtx.SetColor(Color::FromABGR(bgColor));
|
||
}
|
||
|
||
// If there is no background image, draw a color. (If there is
|
||
// neither a background image nor a color, we wouldn't have gotten
|
||
// this far.)
|
||
if (!drawBackgroundImage) {
|
||
if (!isCanvasFrame) {
|
||
DrawBackgroundColor(clipState, &aRenderingCtx, appUnitsPerPixel);
|
||
}
|
||
return DrawResult::SUCCESS;
|
||
}
|
||
|
||
if (layers.mImageCount < 1) {
|
||
// Return if there are no background layers, all work from this point
|
||
// onwards happens iteratively on these.
|
||
return DrawResult::SUCCESS;
|
||
}
|
||
|
||
MOZ_ASSERT((aParams.layer < 0) ||
|
||
(layers.mImageCount > uint32_t(aParams.layer)));
|
||
bool drawAllLayers = (aParams.layer < 0);
|
||
|
||
// Ensure we get invalidated for loads of the image. We need to do
|
||
// this here because this might be the only code that knows about the
|
||
// association of the style data with the frame.
|
||
if (aBackgroundSC != aParams.frame->StyleContext()) {
|
||
uint32_t startLayer = drawAllLayers ? layers.mImageCount - 1
|
||
: aParams.layer;
|
||
uint32_t count = drawAllLayers ? layers.mImageCount : 1;
|
||
NS_FOR_VISIBLE_IMAGE_LAYERS_BACK_TO_FRONT_WITH_RANGE(i, layers, startLayer,
|
||
count) {
|
||
aParams.frame->AssociateImage(layers.mLayers[i].mImage,
|
||
&aParams.presCtx);
|
||
}
|
||
}
|
||
|
||
// The background color is rendered over the entire dirty area,
|
||
// even if the image isn't.
|
||
if (drawBackgroundColor && !isCanvasFrame) {
|
||
DrawBackgroundColor(clipState, &aRenderingCtx, appUnitsPerPixel);
|
||
}
|
||
|
||
// Compute the outermost boundary of the area that might be painted.
|
||
// Same coordinate space as aParams.borderArea & aParams.bgClipRect.
|
||
Sides skipSides = aParams.frame->GetSkipSides();
|
||
nsRect paintBorderArea =
|
||
::BoxDecorationRectForBackground(aParams.frame, aParams.borderArea,
|
||
skipSides, &aBorder);
|
||
nsRect clipBorderArea =
|
||
::BoxDecorationRectForBorder(aParams.frame, aParams.borderArea,
|
||
skipSides, &aBorder);
|
||
|
||
DrawResult result = DrawResult::SUCCESS;
|
||
StyleGeometryBox currentBackgroundClip = StyleGeometryBox::BorderBox;
|
||
uint32_t count = drawAllLayers
|
||
? layers.mImageCount // iterate all image layers.
|
||
: layers.mImageCount - aParams.layer; // iterate from the bottom layer to
|
||
// the 'aParams.layer-th' layer.
|
||
NS_FOR_VISIBLE_IMAGE_LAYERS_BACK_TO_FRONT_WITH_RANGE(i, layers,
|
||
layers.mImageCount - 1,
|
||
count) {
|
||
// NOTE: no Save() yet, we do that later by calling autoSR.EnsureSaved(ctx)
|
||
// in the cases we need it.
|
||
gfxContextAutoSaveRestore autoSR;
|
||
const nsStyleImageLayers::Layer& layer = layers.mLayers[i];
|
||
|
||
if (!aParams.bgClipRect) {
|
||
bool isBottomLayer = (i == layers.mImageCount - 1);
|
||
if (currentBackgroundClip != layer.mClip || isBottomLayer) {
|
||
currentBackgroundClip = layer.mClip;
|
||
// For the bottom layer, we already called GetImageLayerClip above
|
||
// and it stored its results in clipState.
|
||
if (!isBottomLayer) {
|
||
GetImageLayerClip(layer, aParams.frame,
|
||
aBorder, aParams.borderArea, aParams.dirtyRect,
|
||
(aParams.paintFlags & PAINTBG_WILL_PAINT_BORDER),
|
||
appUnitsPerPixel, &clipState);
|
||
}
|
||
SetupImageLayerClip(clipState, &aRenderingCtx,
|
||
appUnitsPerPixel, &autoSR);
|
||
if (!clipBorderArea.IsEqualEdges(aParams.borderArea)) {
|
||
// We're drawing the background for the joined continuation boxes
|
||
// so we need to clip that to the slice that we want for this
|
||
// frame.
|
||
gfxRect clip =
|
||
nsLayoutUtils::RectToGfxRect(aParams.borderArea, appUnitsPerPixel);
|
||
autoSR.EnsureSaved(&aRenderingCtx);
|
||
aRenderingCtx.NewPath();
|
||
aRenderingCtx.SnappedRectangle(clip);
|
||
aRenderingCtx.Clip();
|
||
}
|
||
}
|
||
}
|
||
|
||
// Skip the following layer preparing and painting code if the current
|
||
// layer is not selected for drawing.
|
||
if (aParams.layer >= 0 && i != (uint32_t)aParams.layer) {
|
||
continue;
|
||
}
|
||
nsBackgroundLayerState state =
|
||
PrepareImageLayer(&aParams.presCtx, aParams.frame,
|
||
aParams.paintFlags, paintBorderArea,
|
||
clipState.mBGClipArea, layer, nullptr);
|
||
result &= state.mImageRenderer.PrepareResult();
|
||
|
||
// Skip the layer painting code if we found the dirty region is empty.
|
||
if (clipState.mDirtyRectInDevPx.IsEmpty()) {
|
||
continue;
|
||
}
|
||
|
||
if (!state.mFillArea.IsEmpty()) {
|
||
CompositionOp co = DetermineCompositionOp(aParams, layers, i);
|
||
if (co != CompositionOp::OP_OVER) {
|
||
NS_ASSERTION(aRenderingCtx.CurrentOp() == CompositionOp::OP_OVER,
|
||
"It is assumed the initial op is OP_OVER, when it is "
|
||
"restored later");
|
||
aRenderingCtx.SetOp(co);
|
||
}
|
||
|
||
result &=
|
||
state.mImageRenderer.DrawLayer(&aParams.presCtx,
|
||
aRenderingCtx,
|
||
state.mDestArea, state.mFillArea,
|
||
state.mAnchor + paintBorderArea.TopLeft(),
|
||
clipState.mDirtyRectInAppUnits,
|
||
state.mRepeatSize, aParams.opacity);
|
||
|
||
if (co != CompositionOp::OP_OVER) {
|
||
aRenderingCtx.SetOp(CompositionOp::OP_OVER);
|
||
}
|
||
}
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
DrawResult
|
||
nsCSSRendering::BuildWebRenderDisplayItemsForStyleImageLayerWithSC(const PaintBGParams& aParams,
|
||
mozilla::wr::DisplayListBuilder& aBuilder,
|
||
const mozilla::layers::StackingContextHelper& aSc,
|
||
nsTArray<WebRenderParentCommand>& aParentCommands,
|
||
mozilla::layers::WebRenderDisplayItemLayer* aLayer,
|
||
mozilla::layers::WebRenderLayerManager* aManager,
|
||
nsDisplayItem* aItem,
|
||
nsStyleContext *aBackgroundSC,
|
||
const nsStyleBorder& aBorder)
|
||
{
|
||
MOZ_ASSERT(!(aParams.paintFlags & PAINTBG_MASK_IMAGE));
|
||
|
||
nscoord appUnitsPerPixel = aParams.presCtx.AppUnitsPerDevPixel();
|
||
ImageLayerClipState clipState;
|
||
|
||
clipState.mBGClipArea = *aParams.bgClipRect;
|
||
clipState.mCustomClip = true;
|
||
clipState.mHasRoundedCorners = false;
|
||
SetupDirtyRects(clipState.mBGClipArea, aParams.dirtyRect, appUnitsPerPixel,
|
||
&clipState.mDirtyRectInAppUnits,
|
||
&clipState.mDirtyRectInDevPx);
|
||
|
||
// Compute the outermost boundary of the area that might be painted.
|
||
// Same coordinate space as aParams.borderArea & aParams.bgClipRect.
|
||
Sides skipSides = aParams.frame->GetSkipSides();
|
||
nsRect paintBorderArea =
|
||
::BoxDecorationRectForBackground(aParams.frame, aParams.borderArea,
|
||
skipSides, &aBorder);
|
||
|
||
const nsStyleImageLayers& layers = aBackgroundSC->StyleBackground()->mImage;
|
||
const nsStyleImageLayers::Layer& layer = layers.mLayers[aParams.layer];
|
||
|
||
// Skip the following layer painting code if we found the dirty region is
|
||
// empty or the current layer is not selected for drawing.
|
||
if (clipState.mDirtyRectInDevPx.IsEmpty()) {
|
||
return DrawResult::SUCCESS;
|
||
}
|
||
|
||
DrawResult result = DrawResult::SUCCESS;
|
||
nsBackgroundLayerState state =
|
||
PrepareImageLayer(&aParams.presCtx, aParams.frame,
|
||
aParams.paintFlags, paintBorderArea,
|
||
clipState.mBGClipArea, layer, nullptr);
|
||
result &= state.mImageRenderer.PrepareResult();
|
||
if (!state.mFillArea.IsEmpty()) {
|
||
return state.mImageRenderer.BuildWebRenderDisplayItemsForLayer(&aParams.presCtx,
|
||
aBuilder, aSc, aParentCommands,
|
||
aLayer, aManager, aItem,
|
||
state.mDestArea, state.mFillArea,
|
||
state.mAnchor + paintBorderArea.TopLeft(),
|
||
clipState.mDirtyRectInAppUnits,
|
||
state.mRepeatSize, aParams.opacity);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
nsRect
|
||
nsCSSRendering::ComputeImageLayerPositioningArea(nsPresContext* aPresContext,
|
||
nsIFrame* aForFrame,
|
||
const nsRect& aBorderArea,
|
||
const nsStyleImageLayers::Layer& aLayer,
|
||
nsIFrame** aAttachedToFrame,
|
||
bool* aOutIsTransformedFixed)
|
||
{
|
||
// Compute {background|mask} origin area relative to aBorderArea now as we
|
||
// may need it to compute the effective image size for a CSS gradient.
|
||
nsRect positionArea;
|
||
|
||
StyleGeometryBox layerOrigin =
|
||
ComputeBoxValue(aForFrame, aLayer.mOrigin);
|
||
|
||
if (IsSVGStyleGeometryBox(layerOrigin)) {
|
||
MOZ_ASSERT(aForFrame->IsFrameOfType(nsIFrame::eSVG) &&
|
||
!aForFrame->IsSVGOuterSVGFrame());
|
||
*aAttachedToFrame = aForFrame;
|
||
|
||
positionArea =
|
||
nsLayoutUtils::ComputeGeometryBox(aForFrame, layerOrigin);
|
||
|
||
nsPoint toStrokeBoxOffset = nsPoint(0, 0);
|
||
if (layerOrigin != StyleGeometryBox::StrokeBox) {
|
||
nsRect strokeBox =
|
||
nsLayoutUtils::ComputeGeometryBox(aForFrame,
|
||
StyleGeometryBox::StrokeBox);
|
||
toStrokeBoxOffset = positionArea.TopLeft() - strokeBox.TopLeft();
|
||
}
|
||
|
||
// For SVG frames, the return value is relative to the stroke box
|
||
return nsRect(toStrokeBoxOffset, positionArea.Size());
|
||
}
|
||
|
||
MOZ_ASSERT(!aForFrame->IsFrameOfType(nsIFrame::eSVG) ||
|
||
aForFrame->IsSVGOuterSVGFrame());
|
||
|
||
LayoutFrameType frameType = aForFrame->Type();
|
||
nsIFrame* geometryFrame = aForFrame;
|
||
if (MOZ_UNLIKELY(frameType == LayoutFrameType::Scroll &&
|
||
NS_STYLE_IMAGELAYER_ATTACHMENT_LOCAL == aLayer.mAttachment)) {
|
||
nsIScrollableFrame* scrollableFrame = do_QueryFrame(aForFrame);
|
||
positionArea = nsRect(
|
||
scrollableFrame->GetScrolledFrame()->GetPosition()
|
||
// For the dir=rtl case:
|
||
+ scrollableFrame->GetScrollRange().TopLeft(),
|
||
scrollableFrame->GetScrolledRect().Size());
|
||
// The ScrolledRect’s size does not include the borders or scrollbars,
|
||
// reverse the handling of background-origin
|
||
// compared to the common case below.
|
||
if (layerOrigin == StyleGeometryBox::BorderBox) {
|
||
nsMargin border = geometryFrame->GetUsedBorder();
|
||
border.ApplySkipSides(geometryFrame->GetSkipSides());
|
||
positionArea.Inflate(border);
|
||
positionArea.Inflate(scrollableFrame->GetActualScrollbarSizes());
|
||
} else if (layerOrigin != StyleGeometryBox::PaddingBox) {
|
||
nsMargin padding = geometryFrame->GetUsedPadding();
|
||
padding.ApplySkipSides(geometryFrame->GetSkipSides());
|
||
positionArea.Deflate(padding);
|
||
NS_ASSERTION(layerOrigin == StyleGeometryBox::ContentBox,
|
||
"unknown background-origin value");
|
||
}
|
||
*aAttachedToFrame = aForFrame;
|
||
return positionArea;
|
||
}
|
||
|
||
if (MOZ_UNLIKELY(frameType == LayoutFrameType::Canvas)) {
|
||
geometryFrame = aForFrame->PrincipalChildList().FirstChild();
|
||
// geometryFrame might be null if this canvas is a page created
|
||
// as an overflow container (e.g. the in-flow content has already
|
||
// finished and this page only displays the continuations of
|
||
// absolutely positioned content).
|
||
if (geometryFrame) {
|
||
positionArea = geometryFrame->GetRect();
|
||
}
|
||
} else {
|
||
positionArea = nsRect(nsPoint(0,0), aBorderArea.Size());
|
||
}
|
||
|
||
// See the comment of StyleGeometryBox::MarginBox.
|
||
// Hitting this assertion means we decide to turn on margin-box support for
|
||
// positioned mask from CSS parser and style system. In this case, you
|
||
// should *inflate* positionArea by the margin returning from
|
||
// geometryFrame->GetUsedMargin() in the code chunk bellow.
|
||
MOZ_ASSERT(aLayer.mOrigin != StyleGeometryBox::MarginBox,
|
||
"StyleGeometryBox::MarginBox rendering is not supported yet.\n");
|
||
|
||
// {background|mask} images are tiled over the '{background|mask}-clip' area
|
||
// but the origin of the tiling is based on the '{background|mask}-origin'
|
||
// area.
|
||
if (layerOrigin != StyleGeometryBox::BorderBox && geometryFrame) {
|
||
nsMargin border = geometryFrame->GetUsedBorder();
|
||
if (layerOrigin != StyleGeometryBox::PaddingBox) {
|
||
border += geometryFrame->GetUsedPadding();
|
||
NS_ASSERTION(layerOrigin == StyleGeometryBox::ContentBox,
|
||
"unknown background-origin value");
|
||
}
|
||
positionArea.Deflate(border);
|
||
}
|
||
|
||
nsIFrame* attachedToFrame = aForFrame;
|
||
if (NS_STYLE_IMAGELAYER_ATTACHMENT_FIXED == aLayer.mAttachment) {
|
||
// If it's a fixed background attachment, then the image is placed
|
||
// relative to the viewport, which is the area of the root frame
|
||
// in a screen context or the page content frame in a print context.
|
||
attachedToFrame = aPresContext->PresShell()->FrameManager()->GetRootFrame();
|
||
NS_ASSERTION(attachedToFrame, "no root frame");
|
||
nsIFrame* pageContentFrame = nullptr;
|
||
if (aPresContext->IsPaginated()) {
|
||
pageContentFrame = nsLayoutUtils::GetClosestFrameOfType(
|
||
aForFrame, LayoutFrameType::PageContent);
|
||
if (pageContentFrame) {
|
||
attachedToFrame = pageContentFrame;
|
||
}
|
||
// else this is an embedded shell and its root frame is what we want
|
||
}
|
||
|
||
// If the background is affected by a transform, treat is as if it
|
||
// wasn't fixed.
|
||
if (nsLayoutUtils::IsTransformed(aForFrame, attachedToFrame)) {
|
||
attachedToFrame = aForFrame;
|
||
*aOutIsTransformedFixed = true;
|
||
} else {
|
||
// Set the background positioning area to the viewport's area
|
||
// (relative to aForFrame)
|
||
positionArea =
|
||
nsRect(-aForFrame->GetOffsetTo(attachedToFrame), attachedToFrame->GetSize());
|
||
|
||
if (!pageContentFrame) {
|
||
// Subtract the size of scrollbars.
|
||
nsIScrollableFrame* scrollableFrame =
|
||
aPresContext->PresShell()->GetRootScrollFrameAsScrollable();
|
||
if (scrollableFrame) {
|
||
nsMargin scrollbars = scrollableFrame->GetActualScrollbarSizes();
|
||
positionArea.Deflate(scrollbars);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
*aAttachedToFrame = attachedToFrame;
|
||
|
||
return positionArea;
|
||
}
|
||
|
||
/* static */ nscoord
|
||
nsCSSRendering::ComputeRoundedSize(nscoord aCurrentSize, nscoord aPositioningSize)
|
||
{
|
||
float repeatCount = NS_roundf(float(aPositioningSize) / float(aCurrentSize));
|
||
if (repeatCount < 1.0f) {
|
||
return aPositioningSize;
|
||
}
|
||
return nscoord(NS_lround(float(aPositioningSize) / repeatCount));
|
||
}
|
||
|
||
// Apply the CSS image sizing algorithm as it applies to background images.
|
||
// See http://www.w3.org/TR/css3-background/#the-background-size .
|
||
// aIntrinsicSize is the size that the background image 'would like to be'.
|
||
// It can be found by calling nsImageRenderer::ComputeIntrinsicSize.
|
||
static nsSize
|
||
ComputeDrawnSizeForBackground(const CSSSizeOrRatio& aIntrinsicSize,
|
||
const nsSize& aBgPositioningArea,
|
||
const nsStyleImageLayers::Size& aLayerSize,
|
||
StyleImageLayerRepeat aXRepeat,
|
||
StyleImageLayerRepeat aYRepeat)
|
||
{
|
||
nsSize imageSize;
|
||
|
||
// Size is dictated by cover or contain rules.
|
||
if (aLayerSize.mWidthType == nsStyleImageLayers::Size::eContain ||
|
||
aLayerSize.mWidthType == nsStyleImageLayers::Size::eCover) {
|
||
nsImageRenderer::FitType fitType =
|
||
aLayerSize.mWidthType == nsStyleImageLayers::Size::eCover
|
||
? nsImageRenderer::COVER
|
||
: nsImageRenderer::CONTAIN;
|
||
imageSize = nsImageRenderer::ComputeConstrainedSize(aBgPositioningArea,
|
||
aIntrinsicSize.mRatio,
|
||
fitType);
|
||
} else {
|
||
// No cover/contain constraint, use default algorithm.
|
||
CSSSizeOrRatio specifiedSize;
|
||
if (aLayerSize.mWidthType == nsStyleImageLayers::Size::eLengthPercentage) {
|
||
specifiedSize.SetWidth(
|
||
aLayerSize.ResolveWidthLengthPercentage(aBgPositioningArea));
|
||
}
|
||
if (aLayerSize.mHeightType == nsStyleImageLayers::Size::eLengthPercentage) {
|
||
specifiedSize.SetHeight(
|
||
aLayerSize.ResolveHeightLengthPercentage(aBgPositioningArea));
|
||
}
|
||
|
||
imageSize = nsImageRenderer::ComputeConcreteSize(specifiedSize,
|
||
aIntrinsicSize,
|
||
aBgPositioningArea);
|
||
}
|
||
|
||
// See https://www.w3.org/TR/css3-background/#background-size .
|
||
// "If 'background-repeat' is 'round' for one (or both) dimensions, there is a second
|
||
// step. The UA must scale the image in that dimension (or both dimensions) so that
|
||
// it fits a whole number of times in the background positioning area."
|
||
// "If 'background-repeat' is 'round' for one dimension only and if 'background-size'
|
||
// is 'auto' for the other dimension, then there is a third step: that other dimension
|
||
// is scaled so that the original aspect ratio is restored."
|
||
bool isRepeatRoundInBothDimensions = aXRepeat == StyleImageLayerRepeat::Round &&
|
||
aYRepeat == StyleImageLayerRepeat::Round;
|
||
|
||
// Calculate the rounded size only if the background-size computation
|
||
// returned a correct size for the image.
|
||
if (imageSize.width && aXRepeat == StyleImageLayerRepeat::Round) {
|
||
imageSize.width =
|
||
nsCSSRendering::ComputeRoundedSize(imageSize.width,
|
||
aBgPositioningArea.width);
|
||
if (!isRepeatRoundInBothDimensions &&
|
||
aLayerSize.mHeightType == nsStyleImageLayers::Size::DimensionType::eAuto) {
|
||
// Restore intrinsic rato
|
||
if (aIntrinsicSize.mRatio.width) {
|
||
float scale = float(aIntrinsicSize.mRatio.height) / aIntrinsicSize.mRatio.width;
|
||
imageSize.height = NSCoordSaturatingNonnegativeMultiply(imageSize.width, scale);
|
||
}
|
||
}
|
||
}
|
||
|
||
// Calculate the rounded size only if the background-size computation
|
||
// returned a correct size for the image.
|
||
if (imageSize.height && aYRepeat == StyleImageLayerRepeat::Round) {
|
||
imageSize.height =
|
||
nsCSSRendering::ComputeRoundedSize(imageSize.height,
|
||
aBgPositioningArea.height);
|
||
if (!isRepeatRoundInBothDimensions &&
|
||
aLayerSize.mWidthType == nsStyleImageLayers::Size::DimensionType::eAuto) {
|
||
// Restore intrinsic rato
|
||
if (aIntrinsicSize.mRatio.height) {
|
||
float scale = float(aIntrinsicSize.mRatio.width) / aIntrinsicSize.mRatio.height;
|
||
imageSize.width = NSCoordSaturatingNonnegativeMultiply(imageSize.height, scale);
|
||
}
|
||
}
|
||
}
|
||
|
||
return imageSize;
|
||
}
|
||
|
||
/* ComputeSpacedRepeatSize
|
||
* aImageDimension: the image width/height
|
||
* aAvailableSpace: the background positioning area width/height
|
||
* aRepeat: determine whether the image is repeated
|
||
* Returns the image size plus gap size of app units for use as spacing
|
||
*/
|
||
static nscoord
|
||
ComputeSpacedRepeatSize(nscoord aImageDimension,
|
||
nscoord aAvailableSpace,
|
||
bool& aRepeat) {
|
||
float ratio = static_cast<float>(aAvailableSpace) / aImageDimension;
|
||
|
||
if (ratio < 2.0f) { // If you can't repeat at least twice, then don't repeat.
|
||
aRepeat = false;
|
||
return aImageDimension;
|
||
} else {
|
||
aRepeat = true;
|
||
return (aAvailableSpace - aImageDimension) / (NSToIntFloor(ratio) - 1);
|
||
}
|
||
}
|
||
|
||
/* static */ nscoord
|
||
nsCSSRendering::ComputeBorderSpacedRepeatSize(nscoord aImageDimension,
|
||
nscoord aAvailableSpace,
|
||
nscoord& aSpace)
|
||
{
|
||
int32_t count = aAvailableSpace / aImageDimension;
|
||
aSpace = (aAvailableSpace - aImageDimension * count) / (count + 1);
|
||
return aSpace + aImageDimension;
|
||
}
|
||
|
||
nsBackgroundLayerState
|
||
nsCSSRendering::PrepareImageLayer(nsPresContext* aPresContext,
|
||
nsIFrame* aForFrame,
|
||
uint32_t aFlags,
|
||
const nsRect& aBorderArea,
|
||
const nsRect& aBGClipRect,
|
||
const nsStyleImageLayers::Layer& aLayer,
|
||
bool* aOutIsTransformedFixed)
|
||
{
|
||
/*
|
||
* The properties we need to keep in mind when drawing style image
|
||
* layers are:
|
||
*
|
||
* background-image/ mask-image
|
||
* background-repeat/ mask-repeat
|
||
* background-attachment
|
||
* background-position/ mask-position
|
||
* background-clip/ mask-clip
|
||
* background-origin/ mask-origin
|
||
* background-size/ mask-size
|
||
* background-blend-mode
|
||
* box-decoration-break
|
||
* mask-mode
|
||
* mask-composite
|
||
*
|
||
* (background-color applies to the entire element and not to individual
|
||
* layers, so it is irrelevant to this method.)
|
||
*
|
||
* These properties have the following dependencies upon each other when
|
||
* determining rendering:
|
||
*
|
||
* background-image/ mask-image
|
||
* no dependencies
|
||
* background-repeat/ mask-repeat
|
||
* no dependencies
|
||
* background-attachment
|
||
* no dependencies
|
||
* background-position/ mask-position
|
||
* depends upon background-size/mask-size (for the image's scaled size)
|
||
* and background-break (for the background positioning area)
|
||
* background-clip/ mask-clip
|
||
* no dependencies
|
||
* background-origin/ mask-origin
|
||
* depends upon background-attachment (only in the case where that value
|
||
* is 'fixed')
|
||
* background-size/ mask-size
|
||
* depends upon box-decoration-break (for the background positioning area
|
||
* for resolving percentages), background-image (for the image's intrinsic
|
||
* size), background-repeat (if that value is 'round'), and
|
||
* background-origin (for the background painting area, when
|
||
* background-repeat is 'round')
|
||
* background-blend-mode
|
||
* no dependencies
|
||
* mask-mode
|
||
* no dependencies
|
||
* mask-composite
|
||
* no dependencies
|
||
* box-decoration-break
|
||
* no dependencies
|
||
*
|
||
* As a result of only-if dependencies we don't strictly do a topological
|
||
* sort of the above properties when processing, but it's pretty close to one:
|
||
*
|
||
* background-clip/mask-clip (by caller)
|
||
* background-image/ mask-image
|
||
* box-decoration-break, background-origin/ mask origin
|
||
* background-attachment (postfix for background-origin if 'fixed')
|
||
* background-size/ mask-size
|
||
* background-position/ mask-position
|
||
* background-repeat/ mask-repeat
|
||
*/
|
||
|
||
uint32_t irFlags = 0;
|
||
if (aFlags & nsCSSRendering::PAINTBG_SYNC_DECODE_IMAGES) {
|
||
irFlags |= nsImageRenderer::FLAG_SYNC_DECODE_IMAGES;
|
||
}
|
||
if (aFlags & nsCSSRendering::PAINTBG_TO_WINDOW) {
|
||
irFlags |= nsImageRenderer::FLAG_PAINTING_TO_WINDOW;
|
||
}
|
||
|
||
nsBackgroundLayerState state(aForFrame, &aLayer.mImage, irFlags);
|
||
if (!state.mImageRenderer.PrepareImage()) {
|
||
// There's no image or it's not ready to be painted.
|
||
if (aOutIsTransformedFixed) {
|
||
*aOutIsTransformedFixed = false;
|
||
}
|
||
return state;
|
||
}
|
||
|
||
// The frame to which the background is attached
|
||
nsIFrame* attachedToFrame = aForFrame;
|
||
// Is the background marked 'fixed', but affected by a transform?
|
||
bool transformedFixed = false;
|
||
// Compute background origin area relative to aBorderArea now as we may need
|
||
// it to compute the effective image size for a CSS gradient.
|
||
nsRect positionArea =
|
||
ComputeImageLayerPositioningArea(aPresContext, aForFrame, aBorderArea,
|
||
aLayer, &attachedToFrame, &transformedFixed);
|
||
if (aOutIsTransformedFixed) {
|
||
*aOutIsTransformedFixed = transformedFixed;
|
||
}
|
||
|
||
// For background-attachment:fixed backgrounds, we'll override the area
|
||
// where the background can be drawn to the viewport.
|
||
nsRect bgClipRect = aBGClipRect;
|
||
|
||
if (NS_STYLE_IMAGELAYER_ATTACHMENT_FIXED == aLayer.mAttachment &&
|
||
!transformedFixed &&
|
||
(aFlags & nsCSSRendering::PAINTBG_TO_WINDOW)) {
|
||
bgClipRect = positionArea + aBorderArea.TopLeft();
|
||
}
|
||
|
||
StyleImageLayerRepeat repeatX = aLayer.mRepeat.mXRepeat;
|
||
StyleImageLayerRepeat repeatY = aLayer.mRepeat.mYRepeat;
|
||
|
||
// Scale the image as specified for background-size and background-repeat.
|
||
// Also as required for proper background positioning when background-position
|
||
// is defined with percentages.
|
||
CSSSizeOrRatio intrinsicSize = state.mImageRenderer.ComputeIntrinsicSize();
|
||
nsSize bgPositionSize = positionArea.Size();
|
||
nsSize imageSize = ComputeDrawnSizeForBackground(intrinsicSize,
|
||
bgPositionSize,
|
||
aLayer.mSize,
|
||
repeatX,
|
||
repeatY);
|
||
|
||
if (imageSize.width <= 0 || imageSize.height <= 0)
|
||
return state;
|
||
|
||
state.mImageRenderer.SetPreferredSize(intrinsicSize,
|
||
imageSize);
|
||
|
||
// Compute the anchor point.
|
||
//
|
||
// relative to aBorderArea.TopLeft() (which is where the top-left
|
||
// of aForFrame's border-box will be rendered)
|
||
nsPoint imageTopLeft;
|
||
|
||
// Compute the position of the background now that the background's size is
|
||
// determined.
|
||
nsImageRenderer::ComputeObjectAnchorPoint(aLayer.mPosition,
|
||
bgPositionSize, imageSize,
|
||
&imageTopLeft, &state.mAnchor);
|
||
state.mRepeatSize = imageSize;
|
||
if (repeatX == StyleImageLayerRepeat::Space) {
|
||
bool isRepeat;
|
||
state.mRepeatSize.width = ComputeSpacedRepeatSize(imageSize.width,
|
||
bgPositionSize.width,
|
||
isRepeat);
|
||
if (isRepeat) {
|
||
imageTopLeft.x = 0;
|
||
state.mAnchor.x = 0;
|
||
} else {
|
||
repeatX = StyleImageLayerRepeat::NoRepeat;
|
||
}
|
||
}
|
||
|
||
if (repeatY == StyleImageLayerRepeat::Space) {
|
||
bool isRepeat;
|
||
state.mRepeatSize.height = ComputeSpacedRepeatSize(imageSize.height,
|
||
bgPositionSize.height,
|
||
isRepeat);
|
||
if (isRepeat) {
|
||
imageTopLeft.y = 0;
|
||
state.mAnchor.y = 0;
|
||
} else {
|
||
repeatY = StyleImageLayerRepeat::NoRepeat;
|
||
}
|
||
}
|
||
|
||
imageTopLeft += positionArea.TopLeft();
|
||
state.mAnchor += positionArea.TopLeft();
|
||
state.mDestArea = nsRect(imageTopLeft + aBorderArea.TopLeft(), imageSize);
|
||
state.mFillArea = state.mDestArea;
|
||
|
||
ExtendMode repeatMode = ExtendMode::CLAMP;
|
||
if (repeatX == StyleImageLayerRepeat::Repeat ||
|
||
repeatX == StyleImageLayerRepeat::Round ||
|
||
repeatX == StyleImageLayerRepeat::Space) {
|
||
state.mFillArea.x = bgClipRect.x;
|
||
state.mFillArea.width = bgClipRect.width;
|
||
repeatMode = ExtendMode::REPEAT_X;
|
||
}
|
||
if (repeatY == StyleImageLayerRepeat::Repeat ||
|
||
repeatY == StyleImageLayerRepeat::Round ||
|
||
repeatY == StyleImageLayerRepeat::Space) {
|
||
state.mFillArea.y = bgClipRect.y;
|
||
state.mFillArea.height = bgClipRect.height;
|
||
|
||
/***
|
||
* We're repeating on the X axis already,
|
||
* so if we have to repeat in the Y axis,
|
||
* we really need to repeat in both directions.
|
||
*/
|
||
if (repeatMode == ExtendMode::REPEAT_X) {
|
||
repeatMode = ExtendMode::REPEAT;
|
||
} else {
|
||
repeatMode = ExtendMode::REPEAT_Y;
|
||
}
|
||
}
|
||
state.mImageRenderer.SetExtendMode(repeatMode);
|
||
state.mImageRenderer.SetMaskOp(aLayer.mMaskMode);
|
||
|
||
state.mFillArea.IntersectRect(state.mFillArea, bgClipRect);
|
||
|
||
return state;
|
||
}
|
||
|
||
nsRect
|
||
nsCSSRendering::GetBackgroundLayerRect(nsPresContext* aPresContext,
|
||
nsIFrame* aForFrame,
|
||
const nsRect& aBorderArea,
|
||
const nsRect& aClipRect,
|
||
const nsStyleImageLayers::Layer& aLayer,
|
||
uint32_t aFlags)
|
||
{
|
||
Sides skipSides = aForFrame->GetSkipSides();
|
||
nsRect borderArea =
|
||
::BoxDecorationRectForBackground(aForFrame, aBorderArea, skipSides);
|
||
nsBackgroundLayerState state =
|
||
PrepareImageLayer(aPresContext, aForFrame, aFlags, borderArea,
|
||
aClipRect, aLayer);
|
||
return state.mFillArea;
|
||
}
|
||
|
||
// Begin table border-collapsing section
|
||
// These functions were written to not disrupt the normal ones and yet satisfy some additional requirements
|
||
// At some point, all functions should be unified to include the additional functionality that these provide
|
||
|
||
static nscoord
|
||
RoundIntToPixel(nscoord aValue,
|
||
nscoord aTwipsPerPixel,
|
||
bool aRoundDown = false)
|
||
{
|
||
if (aTwipsPerPixel <= 0)
|
||
// We must be rendering to a device that has a resolution greater than Twips!
|
||
// In that case, aValue is as accurate as it's going to get.
|
||
return aValue;
|
||
|
||
nscoord halfPixel = NSToCoordRound(aTwipsPerPixel / 2.0f);
|
||
nscoord extra = aValue % aTwipsPerPixel;
|
||
nscoord finalValue = (!aRoundDown && (extra >= halfPixel)) ? aValue + (aTwipsPerPixel - extra) : aValue - extra;
|
||
return finalValue;
|
||
}
|
||
|
||
static nscoord
|
||
RoundFloatToPixel(float aValue,
|
||
nscoord aTwipsPerPixel,
|
||
bool aRoundDown = false)
|
||
{
|
||
return RoundIntToPixel(NSToCoordRound(aValue), aTwipsPerPixel, aRoundDown);
|
||
}
|
||
|
||
static void SetPoly(const Rect& aRect, Point* poly)
|
||
{
|
||
poly[0].x = aRect.x;
|
||
poly[0].y = aRect.y;
|
||
poly[1].x = aRect.x + aRect.width;
|
||
poly[1].y = aRect.y;
|
||
poly[2].x = aRect.x + aRect.width;
|
||
poly[2].y = aRect.y + aRect.height;
|
||
poly[3].x = aRect.x;
|
||
poly[3].y = aRect.y + aRect.height;
|
||
}
|
||
|
||
static void
|
||
DrawDashedSegment(DrawTarget& aDrawTarget,
|
||
nsRect aRect,
|
||
nscoord aDashLength,
|
||
nscolor aColor,
|
||
int32_t aAppUnitsPerDevPixel,
|
||
nscoord aTwipsPerPixel,
|
||
bool aHorizontal)
|
||
{
|
||
ColorPattern color(ToDeviceColor(aColor));
|
||
DrawOptions drawOptions(1.f, CompositionOp::OP_OVER, AntialiasMode::NONE);
|
||
StrokeOptions strokeOptions;
|
||
|
||
Float dash[2];
|
||
dash[0] = Float(aDashLength) / aAppUnitsPerDevPixel;
|
||
dash[1] = dash[0];
|
||
|
||
strokeOptions.mDashPattern = dash;
|
||
strokeOptions.mDashLength = MOZ_ARRAY_LENGTH(dash);
|
||
|
||
if (aHorizontal) {
|
||
nsPoint left = (aRect.TopLeft() + aRect.BottomLeft()) / 2;
|
||
nsPoint right = (aRect.TopRight() + aRect.BottomRight()) / 2;
|
||
strokeOptions.mLineWidth = Float(aRect.height) / aAppUnitsPerDevPixel;
|
||
StrokeLineWithSnapping(left, right,
|
||
aAppUnitsPerDevPixel, aDrawTarget,
|
||
color, strokeOptions, drawOptions);
|
||
} else {
|
||
nsPoint top = (aRect.TopLeft() + aRect.TopRight()) / 2;
|
||
nsPoint bottom = (aRect.BottomLeft() + aRect.BottomRight()) / 2;
|
||
strokeOptions.mLineWidth = Float(aRect.width) / aAppUnitsPerDevPixel;
|
||
StrokeLineWithSnapping(top, bottom,
|
||
aAppUnitsPerDevPixel, aDrawTarget,
|
||
color, strokeOptions, drawOptions);
|
||
}
|
||
}
|
||
|
||
static void
|
||
DrawSolidBorderSegment(DrawTarget& aDrawTarget,
|
||
nsRect aRect,
|
||
nscolor aColor,
|
||
int32_t aAppUnitsPerDevPixel,
|
||
nscoord aTwipsPerPixel,
|
||
uint8_t aStartBevelSide = 0,
|
||
nscoord aStartBevelOffset = 0,
|
||
uint8_t aEndBevelSide = 0,
|
||
nscoord aEndBevelOffset = 0)
|
||
{
|
||
ColorPattern color(ToDeviceColor(aColor));
|
||
DrawOptions drawOptions(1.f, CompositionOp::OP_OVER, AntialiasMode::NONE);
|
||
|
||
// We don't need to bevel single pixel borders
|
||
if ((aRect.width == aTwipsPerPixel) || (aRect.height == aTwipsPerPixel) ||
|
||
((0 == aStartBevelOffset) && (0 == aEndBevelOffset))) {
|
||
// simple rectangle
|
||
aDrawTarget.FillRect(NSRectToSnappedRect(aRect, aAppUnitsPerDevPixel,
|
||
aDrawTarget),
|
||
color, drawOptions);
|
||
}
|
||
else {
|
||
// polygon with beveling
|
||
Point poly[4];
|
||
SetPoly(NSRectToSnappedRect(aRect, aAppUnitsPerDevPixel, aDrawTarget),
|
||
poly);
|
||
|
||
Float startBevelOffset =
|
||
NSAppUnitsToFloatPixels(aStartBevelOffset, aAppUnitsPerDevPixel);
|
||
switch(aStartBevelSide) {
|
||
case eSideTop:
|
||
poly[0].x += startBevelOffset;
|
||
break;
|
||
case eSideBottom:
|
||
poly[3].x += startBevelOffset;
|
||
break;
|
||
case eSideRight:
|
||
poly[1].y += startBevelOffset;
|
||
break;
|
||
case eSideLeft:
|
||
poly[0].y += startBevelOffset;
|
||
}
|
||
|
||
Float endBevelOffset =
|
||
NSAppUnitsToFloatPixels(aEndBevelOffset, aAppUnitsPerDevPixel);
|
||
switch(aEndBevelSide) {
|
||
case eSideTop:
|
||
poly[1].x -= endBevelOffset;
|
||
break;
|
||
case eSideBottom:
|
||
poly[2].x -= endBevelOffset;
|
||
break;
|
||
case eSideRight:
|
||
poly[2].y -= endBevelOffset;
|
||
break;
|
||
case eSideLeft:
|
||
poly[3].y -= endBevelOffset;
|
||
}
|
||
|
||
RefPtr<PathBuilder> builder = aDrawTarget.CreatePathBuilder();
|
||
builder->MoveTo(poly[0]);
|
||
builder->LineTo(poly[1]);
|
||
builder->LineTo(poly[2]);
|
||
builder->LineTo(poly[3]);
|
||
builder->Close();
|
||
RefPtr<Path> path = builder->Finish();
|
||
aDrawTarget.Fill(path, color, drawOptions);
|
||
}
|
||
}
|
||
|
||
static void
|
||
GetDashInfo(nscoord aBorderLength,
|
||
nscoord aDashLength,
|
||
nscoord aTwipsPerPixel,
|
||
int32_t& aNumDashSpaces,
|
||
nscoord& aStartDashLength,
|
||
nscoord& aEndDashLength)
|
||
{
|
||
aNumDashSpaces = 0;
|
||
if (aStartDashLength + aDashLength + aEndDashLength >= aBorderLength) {
|
||
aStartDashLength = aBorderLength;
|
||
aEndDashLength = 0;
|
||
}
|
||
else {
|
||
aNumDashSpaces = (aBorderLength - aDashLength)/ (2 * aDashLength); // round down
|
||
nscoord extra = aBorderLength - aStartDashLength - aEndDashLength - (((2 * aNumDashSpaces) - 1) * aDashLength);
|
||
if (extra > 0) {
|
||
nscoord half = RoundIntToPixel(extra / 2, aTwipsPerPixel);
|
||
aStartDashLength += half;
|
||
aEndDashLength += (extra - half);
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
nsCSSRendering::DrawTableBorderSegment(DrawTarget& aDrawTarget,
|
||
uint8_t aBorderStyle,
|
||
nscolor aBorderColor,
|
||
nscolor aBGColor,
|
||
const nsRect& aBorder,
|
||
int32_t aAppUnitsPerDevPixel,
|
||
int32_t aAppUnitsPerCSSPixel,
|
||
uint8_t aStartBevelSide,
|
||
nscoord aStartBevelOffset,
|
||
uint8_t aEndBevelSide,
|
||
nscoord aEndBevelOffset)
|
||
{
|
||
bool horizontal = ((eSideTop == aStartBevelSide) || (eSideBottom == aStartBevelSide));
|
||
nscoord twipsPerPixel = NSIntPixelsToAppUnits(1, aAppUnitsPerCSSPixel);
|
||
uint8_t ridgeGroove = NS_STYLE_BORDER_STYLE_RIDGE;
|
||
|
||
if ((twipsPerPixel >= aBorder.width) || (twipsPerPixel >= aBorder.height) ||
|
||
(NS_STYLE_BORDER_STYLE_DASHED == aBorderStyle) || (NS_STYLE_BORDER_STYLE_DOTTED == aBorderStyle)) {
|
||
// no beveling for 1 pixel border, dash or dot
|
||
aStartBevelOffset = 0;
|
||
aEndBevelOffset = 0;
|
||
}
|
||
|
||
switch (aBorderStyle) {
|
||
case NS_STYLE_BORDER_STYLE_NONE:
|
||
case NS_STYLE_BORDER_STYLE_HIDDEN:
|
||
//NS_ASSERTION(false, "style of none or hidden");
|
||
break;
|
||
case NS_STYLE_BORDER_STYLE_DOTTED:
|
||
case NS_STYLE_BORDER_STYLE_DASHED:
|
||
{
|
||
nscoord dashLength = (NS_STYLE_BORDER_STYLE_DASHED == aBorderStyle) ? DASH_LENGTH : DOT_LENGTH;
|
||
// make the dash length proportional to the border thickness
|
||
dashLength *= (horizontal) ? aBorder.height : aBorder.width;
|
||
// make the min dash length for the ends 1/2 the dash length
|
||
nscoord minDashLength = (NS_STYLE_BORDER_STYLE_DASHED == aBorderStyle)
|
||
? RoundFloatToPixel(((float)dashLength) / 2.0f, twipsPerPixel) : dashLength;
|
||
minDashLength = std::max(minDashLength, twipsPerPixel);
|
||
nscoord numDashSpaces = 0;
|
||
nscoord startDashLength = minDashLength;
|
||
nscoord endDashLength = minDashLength;
|
||
if (horizontal) {
|
||
GetDashInfo(aBorder.width, dashLength, twipsPerPixel, numDashSpaces,
|
||
startDashLength, endDashLength);
|
||
nsRect rect(aBorder.x, aBorder.y, startDashLength, aBorder.height);
|
||
DrawSolidBorderSegment(aDrawTarget, rect, aBorderColor,
|
||
aAppUnitsPerDevPixel, twipsPerPixel);
|
||
|
||
rect.x += startDashLength + dashLength;
|
||
rect.width = aBorder.width
|
||
- (startDashLength + endDashLength + dashLength);
|
||
DrawDashedSegment(aDrawTarget, rect, dashLength, aBorderColor,
|
||
aAppUnitsPerDevPixel, twipsPerPixel, horizontal);
|
||
|
||
rect.x += rect.width;
|
||
rect.width = endDashLength;
|
||
DrawSolidBorderSegment(aDrawTarget, rect, aBorderColor,
|
||
aAppUnitsPerDevPixel, twipsPerPixel);
|
||
}
|
||
else {
|
||
GetDashInfo(aBorder.height, dashLength, twipsPerPixel, numDashSpaces,
|
||
startDashLength, endDashLength);
|
||
nsRect rect(aBorder.x, aBorder.y, aBorder.width, startDashLength);
|
||
DrawSolidBorderSegment(aDrawTarget, rect, aBorderColor,
|
||
aAppUnitsPerDevPixel, twipsPerPixel);
|
||
|
||
rect.y += rect.height + dashLength;
|
||
rect.height = aBorder.height
|
||
- (startDashLength + endDashLength + dashLength);
|
||
DrawDashedSegment(aDrawTarget, rect, dashLength, aBorderColor,
|
||
aAppUnitsPerDevPixel, twipsPerPixel, horizontal);
|
||
|
||
rect.y += rect.height;
|
||
rect.height = endDashLength;
|
||
DrawSolidBorderSegment(aDrawTarget, rect, aBorderColor,
|
||
aAppUnitsPerDevPixel, twipsPerPixel);
|
||
}
|
||
}
|
||
break;
|
||
case NS_STYLE_BORDER_STYLE_GROOVE:
|
||
ridgeGroove = NS_STYLE_BORDER_STYLE_GROOVE; // and fall through to ridge
|
||
MOZ_FALLTHROUGH;
|
||
case NS_STYLE_BORDER_STYLE_RIDGE:
|
||
if ((horizontal && (twipsPerPixel >= aBorder.height)) ||
|
||
(!horizontal && (twipsPerPixel >= aBorder.width))) {
|
||
// a one pixel border
|
||
DrawSolidBorderSegment(aDrawTarget, aBorder, aBorderColor,
|
||
aAppUnitsPerDevPixel, twipsPerPixel,
|
||
aStartBevelSide, aStartBevelOffset,
|
||
aEndBevelSide, aEndBevelOffset);
|
||
}
|
||
else {
|
||
nscoord startBevel = (aStartBevelOffset > 0)
|
||
? RoundFloatToPixel(0.5f * (float)aStartBevelOffset, twipsPerPixel, true) : 0;
|
||
nscoord endBevel = (aEndBevelOffset > 0)
|
||
? RoundFloatToPixel(0.5f * (float)aEndBevelOffset, twipsPerPixel, true) : 0;
|
||
mozilla::Side ridgeGrooveSide = (horizontal) ? eSideTop : eSideLeft;
|
||
// FIXME: In theory, this should use the visited-dependent
|
||
// background color, but I don't care.
|
||
nscolor bevelColor = MakeBevelColor(ridgeGrooveSide, ridgeGroove,
|
||
aBGColor, aBorderColor);
|
||
nsRect rect(aBorder);
|
||
nscoord half;
|
||
if (horizontal) { // top, bottom
|
||
half = RoundFloatToPixel(0.5f * (float)aBorder.height, twipsPerPixel);
|
||
rect.height = half;
|
||
if (eSideTop == aStartBevelSide) {
|
||
rect.x += startBevel;
|
||
rect.width -= startBevel;
|
||
}
|
||
if (eSideTop == aEndBevelSide) {
|
||
rect.width -= endBevel;
|
||
}
|
||
DrawSolidBorderSegment(aDrawTarget, rect, bevelColor,
|
||
aAppUnitsPerDevPixel, twipsPerPixel,
|
||
aStartBevelSide, startBevel, aEndBevelSide,
|
||
endBevel);
|
||
}
|
||
else { // left, right
|
||
half = RoundFloatToPixel(0.5f * (float)aBorder.width, twipsPerPixel);
|
||
rect.width = half;
|
||
if (eSideLeft == aStartBevelSide) {
|
||
rect.y += startBevel;
|
||
rect.height -= startBevel;
|
||
}
|
||
if (eSideLeft == aEndBevelSide) {
|
||
rect.height -= endBevel;
|
||
}
|
||
DrawSolidBorderSegment(aDrawTarget, rect, bevelColor,
|
||
aAppUnitsPerDevPixel, twipsPerPixel,
|
||
aStartBevelSide, startBevel, aEndBevelSide,
|
||
endBevel);
|
||
}
|
||
|
||
rect = aBorder;
|
||
ridgeGrooveSide = (eSideTop == ridgeGrooveSide) ? eSideBottom : eSideRight;
|
||
// FIXME: In theory, this should use the visited-dependent
|
||
// background color, but I don't care.
|
||
bevelColor = MakeBevelColor(ridgeGrooveSide, ridgeGroove,
|
||
aBGColor, aBorderColor);
|
||
if (horizontal) {
|
||
rect.y = rect.y + half;
|
||
rect.height = aBorder.height - half;
|
||
if (eSideBottom == aStartBevelSide) {
|
||
rect.x += startBevel;
|
||
rect.width -= startBevel;
|
||
}
|
||
if (eSideBottom == aEndBevelSide) {
|
||
rect.width -= endBevel;
|
||
}
|
||
DrawSolidBorderSegment(aDrawTarget, rect, bevelColor,
|
||
aAppUnitsPerDevPixel, twipsPerPixel,
|
||
aStartBevelSide, startBevel, aEndBevelSide,
|
||
endBevel);
|
||
}
|
||
else {
|
||
rect.x = rect.x + half;
|
||
rect.width = aBorder.width - half;
|
||
if (eSideRight == aStartBevelSide) {
|
||
rect.y += aStartBevelOffset - startBevel;
|
||
rect.height -= startBevel;
|
||
}
|
||
if (eSideRight == aEndBevelSide) {
|
||
rect.height -= endBevel;
|
||
}
|
||
DrawSolidBorderSegment(aDrawTarget, rect, bevelColor,
|
||
aAppUnitsPerDevPixel, twipsPerPixel,
|
||
aStartBevelSide, startBevel, aEndBevelSide,
|
||
endBevel);
|
||
}
|
||
}
|
||
break;
|
||
case NS_STYLE_BORDER_STYLE_DOUBLE:
|
||
// We can only do "double" borders if the thickness of the border
|
||
// is more than 2px. Otherwise, we fall through to painting a
|
||
// solid border.
|
||
if ((aBorder.width > 2*twipsPerPixel || horizontal) &&
|
||
(aBorder.height > 2*twipsPerPixel || !horizontal)) {
|
||
nscoord startBevel = (aStartBevelOffset > 0)
|
||
? RoundFloatToPixel(0.333333f * (float)aStartBevelOffset, twipsPerPixel) : 0;
|
||
nscoord endBevel = (aEndBevelOffset > 0)
|
||
? RoundFloatToPixel(0.333333f * (float)aEndBevelOffset, twipsPerPixel) : 0;
|
||
if (horizontal) { // top, bottom
|
||
nscoord thirdHeight = RoundFloatToPixel(0.333333f * (float)aBorder.height, twipsPerPixel);
|
||
|
||
// draw the top line or rect
|
||
nsRect topRect(aBorder.x, aBorder.y, aBorder.width, thirdHeight);
|
||
if (eSideTop == aStartBevelSide) {
|
||
topRect.x += aStartBevelOffset - startBevel;
|
||
topRect.width -= aStartBevelOffset - startBevel;
|
||
}
|
||
if (eSideTop == aEndBevelSide) {
|
||
topRect.width -= aEndBevelOffset - endBevel;
|
||
}
|
||
DrawSolidBorderSegment(aDrawTarget, topRect, aBorderColor,
|
||
aAppUnitsPerDevPixel, twipsPerPixel,
|
||
aStartBevelSide, startBevel, aEndBevelSide,
|
||
endBevel);
|
||
|
||
// draw the botom line or rect
|
||
nscoord heightOffset = aBorder.height - thirdHeight;
|
||
nsRect bottomRect(aBorder.x, aBorder.y + heightOffset, aBorder.width, aBorder.height - heightOffset);
|
||
if (eSideBottom == aStartBevelSide) {
|
||
bottomRect.x += aStartBevelOffset - startBevel;
|
||
bottomRect.width -= aStartBevelOffset - startBevel;
|
||
}
|
||
if (eSideBottom == aEndBevelSide) {
|
||
bottomRect.width -= aEndBevelOffset - endBevel;
|
||
}
|
||
DrawSolidBorderSegment(aDrawTarget, bottomRect, aBorderColor,
|
||
aAppUnitsPerDevPixel, twipsPerPixel,
|
||
aStartBevelSide, startBevel, aEndBevelSide,
|
||
endBevel);
|
||
}
|
||
else { // left, right
|
||
nscoord thirdWidth = RoundFloatToPixel(0.333333f * (float)aBorder.width, twipsPerPixel);
|
||
|
||
nsRect leftRect(aBorder.x, aBorder.y, thirdWidth, aBorder.height);
|
||
if (eSideLeft == aStartBevelSide) {
|
||
leftRect.y += aStartBevelOffset - startBevel;
|
||
leftRect.height -= aStartBevelOffset - startBevel;
|
||
}
|
||
if (eSideLeft == aEndBevelSide) {
|
||
leftRect.height -= aEndBevelOffset - endBevel;
|
||
}
|
||
DrawSolidBorderSegment(aDrawTarget, leftRect, aBorderColor,
|
||
aAppUnitsPerDevPixel, twipsPerPixel,
|
||
aStartBevelSide, startBevel, aEndBevelSide,
|
||
endBevel);
|
||
|
||
nscoord widthOffset = aBorder.width - thirdWidth;
|
||
nsRect rightRect(aBorder.x + widthOffset, aBorder.y, aBorder.width - widthOffset, aBorder.height);
|
||
if (eSideRight == aStartBevelSide) {
|
||
rightRect.y += aStartBevelOffset - startBevel;
|
||
rightRect.height -= aStartBevelOffset - startBevel;
|
||
}
|
||
if (eSideRight == aEndBevelSide) {
|
||
rightRect.height -= aEndBevelOffset - endBevel;
|
||
}
|
||
DrawSolidBorderSegment(aDrawTarget, rightRect, aBorderColor,
|
||
aAppUnitsPerDevPixel, twipsPerPixel,
|
||
aStartBevelSide, startBevel, aEndBevelSide,
|
||
endBevel);
|
||
}
|
||
break;
|
||
}
|
||
// else fall through to solid
|
||
MOZ_FALLTHROUGH;
|
||
case NS_STYLE_BORDER_STYLE_SOLID:
|
||
DrawSolidBorderSegment(aDrawTarget, aBorder, aBorderColor,
|
||
aAppUnitsPerDevPixel, twipsPerPixel, aStartBevelSide,
|
||
aStartBevelOffset, aEndBevelSide, aEndBevelOffset);
|
||
break;
|
||
case NS_STYLE_BORDER_STYLE_OUTSET:
|
||
case NS_STYLE_BORDER_STYLE_INSET:
|
||
NS_ASSERTION(false, "inset, outset should have been converted to groove, ridge");
|
||
break;
|
||
case NS_STYLE_BORDER_STYLE_AUTO:
|
||
NS_ASSERTION(false, "Unexpected 'auto' table border");
|
||
break;
|
||
}
|
||
}
|
||
|
||
// End table border-collapsing section
|
||
|
||
Rect
|
||
nsCSSRendering::ExpandPaintingRectForDecorationLine(
|
||
nsIFrame* aFrame,
|
||
const uint8_t aStyle,
|
||
const Rect& aClippedRect,
|
||
const Float aICoordInFrame,
|
||
const Float aCycleLength,
|
||
bool aVertical)
|
||
{
|
||
switch (aStyle) {
|
||
case NS_STYLE_TEXT_DECORATION_STYLE_DOTTED:
|
||
case NS_STYLE_TEXT_DECORATION_STYLE_DASHED:
|
||
case NS_STYLE_TEXT_DECORATION_STYLE_WAVY:
|
||
break;
|
||
default:
|
||
NS_ERROR("Invalid style was specified");
|
||
return aClippedRect;
|
||
}
|
||
|
||
nsBlockFrame* block = nullptr;
|
||
// Note that when we paint the decoration lines in relative positioned
|
||
// box, we should paint them like all of the boxes are positioned as static.
|
||
nscoord framePosInBlockAppUnits = 0;
|
||
for (nsIFrame* f = aFrame; f; f = f->GetParent()) {
|
||
block = do_QueryFrame(f);
|
||
if (block) {
|
||
break;
|
||
}
|
||
framePosInBlockAppUnits += aVertical ?
|
||
f->GetNormalPosition().y : f->GetNormalPosition().x;
|
||
}
|
||
|
||
NS_ENSURE_TRUE(block, aClippedRect);
|
||
|
||
nsPresContext *pc = aFrame->PresContext();
|
||
Float framePosInBlock = Float(pc->AppUnitsToGfxUnits(framePosInBlockAppUnits));
|
||
int32_t rectPosInBlock =
|
||
int32_t(NS_round(framePosInBlock + aICoordInFrame));
|
||
int32_t extraStartEdge =
|
||
rectPosInBlock - (rectPosInBlock / int32_t(aCycleLength) * aCycleLength);
|
||
Rect rect(aClippedRect);
|
||
if (aVertical) {
|
||
rect.y -= extraStartEdge;
|
||
rect.height += extraStartEdge;
|
||
} else {
|
||
rect.x -= extraStartEdge;
|
||
rect.width += extraStartEdge;
|
||
}
|
||
return rect;
|
||
}
|
||
|
||
void
|
||
nsCSSRendering::PaintDecorationLine(nsIFrame* aFrame, DrawTarget& aDrawTarget,
|
||
const PaintDecorationLineParams& aParams)
|
||
{
|
||
NS_ASSERTION(aParams.style != NS_STYLE_TEXT_DECORATION_STYLE_NONE,
|
||
"aStyle is none");
|
||
|
||
Rect rect = ToRect(GetTextDecorationRectInternal(aParams.pt, aParams));
|
||
if (rect.IsEmpty() || !rect.Intersects(aParams.dirtyRect)) {
|
||
return;
|
||
}
|
||
|
||
if (aParams.decoration != NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE &&
|
||
aParams.decoration != NS_STYLE_TEXT_DECORATION_LINE_OVERLINE &&
|
||
aParams.decoration != NS_STYLE_TEXT_DECORATION_LINE_LINE_THROUGH) {
|
||
NS_ERROR("Invalid decoration value!");
|
||
return;
|
||
}
|
||
|
||
Float lineThickness = std::max(NS_round(aParams.lineSize.height), 1.0);
|
||
|
||
ColorPattern color(ToDeviceColor(aParams.color));
|
||
StrokeOptions strokeOptions(lineThickness);
|
||
DrawOptions drawOptions;
|
||
|
||
Float dash[2];
|
||
|
||
AutoPopClips autoPopClips(&aDrawTarget);
|
||
|
||
switch (aParams.style) {
|
||
case NS_STYLE_TEXT_DECORATION_STYLE_SOLID:
|
||
case NS_STYLE_TEXT_DECORATION_STYLE_DOUBLE:
|
||
break;
|
||
case NS_STYLE_TEXT_DECORATION_STYLE_DASHED: {
|
||
autoPopClips.PushClipRect(rect);
|
||
Float dashWidth = lineThickness * DOT_LENGTH * DASH_LENGTH;
|
||
dash[0] = dashWidth;
|
||
dash[1] = dashWidth;
|
||
strokeOptions.mDashPattern = dash;
|
||
strokeOptions.mDashLength = MOZ_ARRAY_LENGTH(dash);
|
||
strokeOptions.mLineCap = CapStyle::BUTT;
|
||
rect = ExpandPaintingRectForDecorationLine(aFrame, aParams.style,
|
||
rect, aParams.icoordInFrame,
|
||
dashWidth * 2,
|
||
aParams.vertical);
|
||
// We should continue to draw the last dash even if it is not in the rect.
|
||
rect.width += dashWidth;
|
||
break;
|
||
}
|
||
case NS_STYLE_TEXT_DECORATION_STYLE_DOTTED: {
|
||
autoPopClips.PushClipRect(rect);
|
||
Float dashWidth = lineThickness * DOT_LENGTH;
|
||
if (lineThickness > 2.0) {
|
||
dash[0] = 0.f;
|
||
dash[1] = dashWidth * 2.f;
|
||
strokeOptions.mLineCap = CapStyle::ROUND;
|
||
} else {
|
||
dash[0] = dashWidth;
|
||
dash[1] = dashWidth;
|
||
}
|
||
strokeOptions.mDashPattern = dash;
|
||
strokeOptions.mDashLength = MOZ_ARRAY_LENGTH(dash);
|
||
rect = ExpandPaintingRectForDecorationLine(aFrame, aParams.style,
|
||
rect, aParams.icoordInFrame,
|
||
dashWidth * 2,
|
||
aParams.vertical);
|
||
// We should continue to draw the last dot even if it is not in the rect.
|
||
rect.width += dashWidth;
|
||
break;
|
||
}
|
||
case NS_STYLE_TEXT_DECORATION_STYLE_WAVY:
|
||
autoPopClips.PushClipRect(rect);
|
||
if (lineThickness > 2.0) {
|
||
drawOptions.mAntialiasMode = AntialiasMode::SUBPIXEL;
|
||
} else {
|
||
// Don't use anti-aliasing here. Because looks like lighter color wavy
|
||
// line at this case. And probably, users don't think the
|
||
// non-anti-aliased wavy line is not pretty.
|
||
drawOptions.mAntialiasMode = AntialiasMode::NONE;
|
||
}
|
||
break;
|
||
default:
|
||
NS_ERROR("Invalid style value!");
|
||
return;
|
||
}
|
||
|
||
// The block-direction position should be set to the middle of the line.
|
||
if (aParams.vertical) {
|
||
rect.x += lineThickness / 2;
|
||
} else {
|
||
rect.y += lineThickness / 2;
|
||
}
|
||
|
||
switch (aParams.style) {
|
||
case NS_STYLE_TEXT_DECORATION_STYLE_SOLID:
|
||
case NS_STYLE_TEXT_DECORATION_STYLE_DOTTED:
|
||
case NS_STYLE_TEXT_DECORATION_STYLE_DASHED: {
|
||
Point p1 = rect.TopLeft();
|
||
Point p2 = aParams.vertical ? rect.BottomLeft() : rect.TopRight();
|
||
aDrawTarget.StrokeLine(p1, p2, color, strokeOptions, drawOptions);
|
||
return;
|
||
}
|
||
case NS_STYLE_TEXT_DECORATION_STYLE_DOUBLE: {
|
||
/**
|
||
* We are drawing double line as:
|
||
*
|
||
* +-------------------------------------------+
|
||
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| ^
|
||
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| | lineThickness
|
||
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| v
|
||
* | |
|
||
* | |
|
||
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| ^
|
||
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| | lineThickness
|
||
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| v
|
||
* +-------------------------------------------+
|
||
*/
|
||
Point p1 = rect.TopLeft();
|
||
Point p2 = aParams.vertical ? rect.BottomLeft() : rect.TopRight();
|
||
aDrawTarget.StrokeLine(p1, p2, color, strokeOptions, drawOptions);
|
||
|
||
if (aParams.vertical) {
|
||
rect.width -= lineThickness;
|
||
} else {
|
||
rect.height -= lineThickness;
|
||
}
|
||
|
||
p1 = aParams.vertical ? rect.TopRight() : rect.BottomLeft();
|
||
p2 = rect.BottomRight();
|
||
aDrawTarget.StrokeLine(p1, p2, color, strokeOptions, drawOptions);
|
||
return;
|
||
}
|
||
case NS_STYLE_TEXT_DECORATION_STYLE_WAVY: {
|
||
/**
|
||
* We are drawing wavy line as:
|
||
*
|
||
* P: Path, X: Painted pixel
|
||
*
|
||
* +---------------------------------------+
|
||
* XX|X XXXXXX XXXXXX |
|
||
* PP|PX XPPPPPPX XPPPPPPX | ^
|
||
* XX|XPX XPXXXXXXPX XPXXXXXXPX| |
|
||
* | XPX XPX XPX XPX XP|X |adv
|
||
* | XPXXXXXXPX XPXXXXXXPX X|PX |
|
||
* | XPPPPPPX XPPPPPPX |XPX v
|
||
* | XXXXXX XXXXXX | XX
|
||
* +---------------------------------------+
|
||
* <---><---> ^
|
||
* adv flatLengthAtVertex rightMost
|
||
*
|
||
* 1. Always starts from top-left of the drawing area, however, we need
|
||
* to draw the line from outside of the rect. Because the start
|
||
* point of the line is not good style if we draw from inside it.
|
||
* 2. First, draw horizontal line from outside the rect to top-left of
|
||
* the rect;
|
||
* 3. Goes down to bottom of the area at 45 degrees.
|
||
* 4. Slides to right horizontaly, see |flatLengthAtVertex|.
|
||
* 5. Goes up to top of the area at 45 degrees.
|
||
* 6. Slides to right horizontaly.
|
||
* 7. Repeat from 2 until reached to right-most edge of the area.
|
||
*
|
||
* In the vertical case, swap horizontal and vertical coordinates and
|
||
* directions in the above description.
|
||
*/
|
||
|
||
Float& rectICoord = aParams.vertical ? rect.y : rect.x;
|
||
Float& rectISize = aParams.vertical ? rect.height : rect.width;
|
||
const Float rectBSize = aParams.vertical ? rect.width : rect.height;
|
||
|
||
const Float adv = rectBSize - lineThickness;
|
||
const Float flatLengthAtVertex =
|
||
std::max((lineThickness - 1.0) * 2.0, 1.0);
|
||
|
||
// Align the start of wavy lines to the nearest ancestor block.
|
||
const Float cycleLength = 2 * (adv + flatLengthAtVertex);
|
||
rect = ExpandPaintingRectForDecorationLine(aFrame, aParams.style, rect,
|
||
aParams.icoordInFrame,
|
||
cycleLength, aParams.vertical);
|
||
// figure out if we can trim whole cycles from the left and right edges
|
||
// of the line, to try and avoid creating an unnecessarily long and
|
||
// complex path
|
||
const Float dirtyRectICoord = aParams.vertical ? aParams.dirtyRect.y
|
||
: aParams.dirtyRect.x;
|
||
int32_t skipCycles = floor((dirtyRectICoord - rectICoord) / cycleLength);
|
||
if (skipCycles > 0) {
|
||
rectICoord += skipCycles * cycleLength;
|
||
rectISize -= skipCycles * cycleLength;
|
||
}
|
||
|
||
rectICoord += lineThickness / 2.0;
|
||
Point pt(rect.TopLeft());
|
||
Float& ptICoord = aParams.vertical ? pt.y : pt.x;
|
||
Float& ptBCoord = aParams.vertical ? pt.x : pt.y;
|
||
if (aParams.vertical) {
|
||
ptBCoord += adv + lineThickness / 2.0;
|
||
}
|
||
Float iCoordLimit = ptICoord + rectISize + lineThickness;
|
||
|
||
const Float dirtyRectIMost = aParams.vertical ?
|
||
aParams.dirtyRect.YMost() : aParams.dirtyRect.XMost();
|
||
skipCycles = floor((iCoordLimit - dirtyRectIMost) / cycleLength);
|
||
if (skipCycles > 0) {
|
||
iCoordLimit -= skipCycles * cycleLength;
|
||
}
|
||
|
||
RefPtr<PathBuilder> builder = aDrawTarget.CreatePathBuilder();
|
||
RefPtr<Path> path;
|
||
|
||
ptICoord -= lineThickness;
|
||
builder->MoveTo(pt); // 1
|
||
|
||
ptICoord = rectICoord;
|
||
builder->LineTo(pt); // 2
|
||
|
||
// In vertical mode, to go "down" relative to the text we need to
|
||
// decrease the block coordinate, whereas in horizontal we increase
|
||
// it. So the sense of this flag is effectively inverted.
|
||
bool goDown = aParams.vertical ? false : true;
|
||
uint32_t iter = 0;
|
||
while (ptICoord < iCoordLimit) {
|
||
if (++iter > 1000) {
|
||
// stroke the current path and start again, to avoid pathological
|
||
// behavior in cairo with huge numbers of path segments
|
||
path = builder->Finish();
|
||
aDrawTarget.Stroke(path, color, strokeOptions, drawOptions);
|
||
builder = aDrawTarget.CreatePathBuilder();
|
||
builder->MoveTo(pt);
|
||
iter = 0;
|
||
}
|
||
ptICoord += adv;
|
||
ptBCoord += goDown ? adv : -adv;
|
||
|
||
builder->LineTo(pt); // 3 and 5
|
||
|
||
ptICoord += flatLengthAtVertex;
|
||
builder->LineTo(pt); // 4 and 6
|
||
|
||
goDown = !goDown;
|
||
}
|
||
path = builder->Finish();
|
||
aDrawTarget.Stroke(path, color, strokeOptions, drawOptions);
|
||
return;
|
||
}
|
||
default:
|
||
NS_ERROR("Invalid style value!");
|
||
}
|
||
}
|
||
|
||
Rect
|
||
nsCSSRendering::DecorationLineToPath(const PaintDecorationLineParams& aParams)
|
||
{
|
||
NS_ASSERTION(aParams.style != NS_STYLE_TEXT_DECORATION_STYLE_NONE,
|
||
"aStyle is none");
|
||
|
||
Rect path; // To benefit from RVO, we return this from all return points
|
||
|
||
Rect rect = ToRect(GetTextDecorationRectInternal(aParams.pt, aParams));
|
||
if (rect.IsEmpty() || !rect.Intersects(aParams.dirtyRect)) {
|
||
return path;
|
||
}
|
||
|
||
if (aParams.decoration != NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE &&
|
||
aParams.decoration != NS_STYLE_TEXT_DECORATION_LINE_OVERLINE &&
|
||
aParams.decoration != NS_STYLE_TEXT_DECORATION_LINE_LINE_THROUGH) {
|
||
NS_ERROR("Invalid decoration value!");
|
||
return path;
|
||
}
|
||
|
||
if (aParams.style != NS_STYLE_TEXT_DECORATION_STYLE_SOLID) {
|
||
// For the moment, we support only solid text decorations.
|
||
return path;
|
||
}
|
||
|
||
Float lineThickness = std::max(NS_round(aParams.lineSize.height), 1.0);
|
||
|
||
// The block-direction position should be set to the middle of the line.
|
||
if (aParams.vertical) {
|
||
rect.x += lineThickness / 2;
|
||
path = Rect(rect.TopLeft() - Point(lineThickness / 2, 0.0),
|
||
Size(lineThickness, rect.Height()));
|
||
} else {
|
||
rect.y += lineThickness / 2;
|
||
path = Rect(rect.TopLeft() - Point(0.0, lineThickness / 2),
|
||
Size(rect.Width(), lineThickness));
|
||
}
|
||
|
||
return path;
|
||
}
|
||
|
||
nsRect
|
||
nsCSSRendering::GetTextDecorationRect(nsPresContext* aPresContext,
|
||
const DecorationRectParams& aParams)
|
||
{
|
||
NS_ASSERTION(aPresContext, "aPresContext is null");
|
||
NS_ASSERTION(aParams.style != NS_STYLE_TEXT_DECORATION_STYLE_NONE,
|
||
"aStyle is none");
|
||
|
||
gfxRect rect = GetTextDecorationRectInternal(Point(0, 0), aParams);
|
||
// The rect values are already rounded to nearest device pixels.
|
||
nsRect r;
|
||
r.x = aPresContext->GfxUnitsToAppUnits(rect.X());
|
||
r.y = aPresContext->GfxUnitsToAppUnits(rect.Y());
|
||
r.width = aPresContext->GfxUnitsToAppUnits(rect.Width());
|
||
r.height = aPresContext->GfxUnitsToAppUnits(rect.Height());
|
||
return r;
|
||
}
|
||
|
||
gfxRect
|
||
nsCSSRendering::GetTextDecorationRectInternal(const Point& aPt,
|
||
const DecorationRectParams& aParams)
|
||
{
|
||
NS_ASSERTION(aParams.style <= NS_STYLE_TEXT_DECORATION_STYLE_WAVY,
|
||
"Invalid aStyle value");
|
||
|
||
if (aParams.style == NS_STYLE_TEXT_DECORATION_STYLE_NONE)
|
||
return gfxRect(0, 0, 0, 0);
|
||
|
||
bool canLiftUnderline = aParams.descentLimit >= 0.0;
|
||
|
||
gfxFloat iCoord = aParams.vertical ? aPt.y : aPt.x;
|
||
gfxFloat bCoord = aParams.vertical ? aPt.x : aPt.y;
|
||
|
||
// 'left' and 'right' are relative to the line, so for vertical writing modes
|
||
// they will actually become top and bottom of the rendered line.
|
||
// Similarly, aLineSize.width and .height are actually length and thickness
|
||
// of the line, which runs horizontally or vertically according to aVertical.
|
||
const gfxFloat left = floor(iCoord + 0.5),
|
||
right = floor(iCoord + aParams.lineSize.width + 0.5);
|
||
|
||
// We compute |r| as if for a horizontal text run, and then swap vertical
|
||
// and horizontal coordinates at the end if vertical was requested.
|
||
gfxRect r(left, 0, right - left, 0);
|
||
|
||
gfxFloat lineThickness = NS_round(aParams.lineSize.height);
|
||
lineThickness = std::max(lineThickness, 1.0);
|
||
|
||
gfxFloat ascent = NS_round(aParams.ascent);
|
||
gfxFloat descentLimit = floor(aParams.descentLimit);
|
||
|
||
gfxFloat suggestedMaxRectHeight = std::max(std::min(ascent, descentLimit), 1.0);
|
||
r.height = lineThickness;
|
||
if (aParams.style == NS_STYLE_TEXT_DECORATION_STYLE_DOUBLE) {
|
||
/**
|
||
* We will draw double line as:
|
||
*
|
||
* +-------------------------------------------+
|
||
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| ^
|
||
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| | lineThickness
|
||
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| v
|
||
* | | ^
|
||
* | | | gap
|
||
* | | v
|
||
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| ^
|
||
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| | lineThickness
|
||
* |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX| v
|
||
* +-------------------------------------------+
|
||
*/
|
||
gfxFloat gap = NS_round(lineThickness / 2.0);
|
||
gap = std::max(gap, 1.0);
|
||
r.height = lineThickness * 2.0 + gap;
|
||
if (canLiftUnderline) {
|
||
if (r.Height() > suggestedMaxRectHeight) {
|
||
// Don't shrink the line height, because the thickness has some meaning.
|
||
// We can just shrink the gap at this time.
|
||
r.height = std::max(suggestedMaxRectHeight, lineThickness * 2.0 + 1.0);
|
||
}
|
||
}
|
||
} else if (aParams.style == NS_STYLE_TEXT_DECORATION_STYLE_WAVY) {
|
||
/**
|
||
* We will draw wavy line as:
|
||
*
|
||
* +-------------------------------------------+
|
||
* |XXXXX XXXXXX XXXXXX | ^
|
||
* |XXXXXX XXXXXXXX XXXXXXXX | | lineThickness
|
||
* |XXXXXXX XXXXXXXXXX XXXXXXXXXX| v
|
||
* | XXX XXX XXX XXX XX|
|
||
* | XXXXXXXXXX XXXXXXXXXX X|
|
||
* | XXXXXXXX XXXXXXXX |
|
||
* | XXXXXX XXXXXX |
|
||
* +-------------------------------------------+
|
||
*/
|
||
r.height = lineThickness > 2.0 ? lineThickness * 4.0 : lineThickness * 3.0;
|
||
if (canLiftUnderline) {
|
||
if (r.Height() > suggestedMaxRectHeight) {
|
||
// Don't shrink the line height even if there is not enough space,
|
||
// because the thickness has some meaning. E.g., the 1px wavy line and
|
||
// 2px wavy line can be used for different meaning in IME selections
|
||
// at same time.
|
||
r.height = std::max(suggestedMaxRectHeight, lineThickness * 2.0);
|
||
}
|
||
}
|
||
}
|
||
|
||
gfxFloat baseline = floor(bCoord + aParams.ascent + 0.5);
|
||
gfxFloat offset = 0.0;
|
||
switch (aParams.decoration) {
|
||
case NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE:
|
||
offset = aParams.offset;
|
||
if (canLiftUnderline) {
|
||
if (descentLimit < -offset + r.Height()) {
|
||
// If we can ignore the offset and the decoration line is overflowing,
|
||
// we should align the bottom edge of the decoration line rect if it's
|
||
// possible. Otherwise, we should lift up the top edge of the rect as
|
||
// far as possible.
|
||
gfxFloat offsetBottomAligned = -descentLimit + r.Height();
|
||
gfxFloat offsetTopAligned = 0.0;
|
||
offset = std::min(offsetBottomAligned, offsetTopAligned);
|
||
}
|
||
}
|
||
break;
|
||
case NS_STYLE_TEXT_DECORATION_LINE_OVERLINE:
|
||
offset = aParams.offset - lineThickness + r.Height();
|
||
break;
|
||
case NS_STYLE_TEXT_DECORATION_LINE_LINE_THROUGH: {
|
||
gfxFloat extra = floor(r.Height() / 2.0 + 0.5);
|
||
extra = std::max(extra, lineThickness);
|
||
offset = aParams.offset - lineThickness + extra;
|
||
break;
|
||
}
|
||
default:
|
||
NS_ERROR("Invalid decoration value!");
|
||
}
|
||
|
||
if (aParams.vertical) {
|
||
r.y = baseline + floor(offset + 0.5);
|
||
Swap(r.x, r.y);
|
||
Swap(r.width, r.height);
|
||
} else {
|
||
r.y = baseline - floor(offset + 0.5);
|
||
}
|
||
|
||
return r;
|
||
}
|
||
|
||
#define MAX_BLUR_RADIUS 300
|
||
#define MAX_SPREAD_RADIUS 50
|
||
|
||
static inline gfxPoint ComputeBlurStdDev(nscoord aBlurRadius,
|
||
int32_t aAppUnitsPerDevPixel,
|
||
gfxFloat aScaleX,
|
||
gfxFloat aScaleY)
|
||
{
|
||
// http://dev.w3.org/csswg/css3-background/#box-shadow says that the
|
||
// standard deviation of the blur should be half the given blur value.
|
||
gfxFloat blurStdDev = gfxFloat(aBlurRadius) / gfxFloat(aAppUnitsPerDevPixel);
|
||
|
||
return gfxPoint(std::min((blurStdDev * aScaleX),
|
||
gfxFloat(MAX_BLUR_RADIUS)) / 2.0,
|
||
std::min((blurStdDev * aScaleY),
|
||
gfxFloat(MAX_BLUR_RADIUS)) / 2.0);
|
||
}
|
||
|
||
static inline IntSize
|
||
ComputeBlurRadius(nscoord aBlurRadius,
|
||
int32_t aAppUnitsPerDevPixel,
|
||
gfxFloat aScaleX = 1.0,
|
||
gfxFloat aScaleY = 1.0)
|
||
{
|
||
gfxPoint scaledBlurStdDev = ComputeBlurStdDev(aBlurRadius, aAppUnitsPerDevPixel,
|
||
aScaleX, aScaleY);
|
||
return
|
||
gfxAlphaBoxBlur::CalculateBlurRadius(scaledBlurStdDev);
|
||
}
|
||
|
||
// -----
|
||
// nsContextBoxBlur
|
||
// -----
|
||
gfxContext*
|
||
nsContextBoxBlur::Init(const nsRect& aRect, nscoord aSpreadRadius,
|
||
nscoord aBlurRadius,
|
||
int32_t aAppUnitsPerDevPixel,
|
||
gfxContext* aDestinationCtx,
|
||
const nsRect& aDirtyRect,
|
||
const gfxRect* aSkipRect,
|
||
uint32_t aFlags)
|
||
{
|
||
if (aRect.IsEmpty()) {
|
||
mContext = nullptr;
|
||
return nullptr;
|
||
}
|
||
|
||
IntSize blurRadius;
|
||
IntSize spreadRadius;
|
||
GetBlurAndSpreadRadius(aDestinationCtx->GetDrawTarget(), aAppUnitsPerDevPixel,
|
||
aBlurRadius, aSpreadRadius,
|
||
blurRadius, spreadRadius);
|
||
|
||
mDestinationCtx = aDestinationCtx;
|
||
|
||
// If not blurring, draw directly onto the destination device
|
||
if (blurRadius.width <= 0 && blurRadius.height <= 0 &&
|
||
spreadRadius.width <= 0 && spreadRadius.height <= 0 &&
|
||
!(aFlags & FORCE_MASK)) {
|
||
mContext = aDestinationCtx;
|
||
return mContext;
|
||
}
|
||
|
||
// Convert from app units to device pixels
|
||
gfxRect rect = nsLayoutUtils::RectToGfxRect(aRect, aAppUnitsPerDevPixel);
|
||
|
||
gfxRect dirtyRect =
|
||
nsLayoutUtils::RectToGfxRect(aDirtyRect, aAppUnitsPerDevPixel);
|
||
dirtyRect.RoundOut();
|
||
|
||
gfxMatrix transform = aDestinationCtx->CurrentMatrix();
|
||
rect = transform.TransformBounds(rect);
|
||
|
||
mPreTransformed = !transform.IsIdentity();
|
||
|
||
// Create the temporary surface for blurring
|
||
dirtyRect = transform.TransformBounds(dirtyRect);
|
||
bool useHardwareAccel = !(aFlags & DISABLE_HARDWARE_ACCELERATION_BLUR);
|
||
if (aSkipRect) {
|
||
gfxRect skipRect = transform.TransformBounds(*aSkipRect);
|
||
mContext = mAlphaBoxBlur.Init(aDestinationCtx, rect, spreadRadius,
|
||
blurRadius, &dirtyRect, &skipRect,
|
||
useHardwareAccel);
|
||
} else {
|
||
mContext = mAlphaBoxBlur.Init(aDestinationCtx, rect, spreadRadius,
|
||
blurRadius, &dirtyRect, nullptr,
|
||
useHardwareAccel);
|
||
}
|
||
|
||
if (mContext) {
|
||
// we don't need to blur if skipRect is equal to rect
|
||
// and mContext will be nullptr
|
||
mContext->Multiply(transform);
|
||
}
|
||
return mContext;
|
||
}
|
||
|
||
void
|
||
nsContextBoxBlur::DoPaint()
|
||
{
|
||
if (mContext == mDestinationCtx) {
|
||
return;
|
||
}
|
||
|
||
gfxContextMatrixAutoSaveRestore saveMatrix(mDestinationCtx);
|
||
|
||
if (mPreTransformed) {
|
||
mDestinationCtx->SetMatrix(gfxMatrix());
|
||
}
|
||
|
||
mAlphaBoxBlur.Paint(mDestinationCtx);
|
||
}
|
||
|
||
gfxContext*
|
||
nsContextBoxBlur::GetContext()
|
||
{
|
||
return mContext;
|
||
}
|
||
|
||
/* static */ nsMargin
|
||
nsContextBoxBlur::GetBlurRadiusMargin(nscoord aBlurRadius,
|
||
int32_t aAppUnitsPerDevPixel)
|
||
{
|
||
IntSize blurRadius = ComputeBlurRadius(aBlurRadius, aAppUnitsPerDevPixel);
|
||
|
||
nsMargin result;
|
||
result.top = result.bottom = blurRadius.height * aAppUnitsPerDevPixel;
|
||
result.left = result.right = blurRadius.width * aAppUnitsPerDevPixel;
|
||
return result;
|
||
}
|
||
|
||
/* static */ void
|
||
nsContextBoxBlur::BlurRectangle(gfxContext* aDestinationCtx,
|
||
const nsRect& aRect,
|
||
int32_t aAppUnitsPerDevPixel,
|
||
RectCornerRadii* aCornerRadii,
|
||
nscoord aBlurRadius,
|
||
const Color& aShadowColor,
|
||
const nsRect& aDirtyRect,
|
||
const gfxRect& aSkipRect)
|
||
{
|
||
DrawTarget& aDestDrawTarget = *aDestinationCtx->GetDrawTarget();
|
||
|
||
if (aRect.IsEmpty()) {
|
||
return;
|
||
}
|
||
|
||
Rect shadowGfxRect = NSRectToRect(aRect, aAppUnitsPerDevPixel);
|
||
|
||
if (aBlurRadius <= 0) {
|
||
ColorPattern color(ToDeviceColor(aShadowColor));
|
||
if (aCornerRadii) {
|
||
RefPtr<Path> roundedRect = MakePathForRoundedRect(aDestDrawTarget,
|
||
shadowGfxRect,
|
||
*aCornerRadii);
|
||
aDestDrawTarget.Fill(roundedRect, color);
|
||
} else {
|
||
aDestDrawTarget.FillRect(shadowGfxRect, color);
|
||
}
|
||
return;
|
||
}
|
||
|
||
gfxFloat scaleX = 1;
|
||
gfxFloat scaleY = 1;
|
||
|
||
// Do blurs in device space when possible.
|
||
// Chrome/Skia always does the blurs in device space
|
||
// and will sometimes get incorrect results (e.g. rotated blurs)
|
||
gfxMatrix transform = aDestinationCtx->CurrentMatrix();
|
||
// XXX: we could probably handle negative scales but for now it's easier just to fallback
|
||
if (!transform.HasNonAxisAlignedTransform() && transform._11 > 0.0 && transform._22 > 0.0) {
|
||
scaleX = transform._11;
|
||
scaleY = transform._22;
|
||
aDestinationCtx->SetMatrix(gfxMatrix());
|
||
} else {
|
||
transform = gfxMatrix();
|
||
}
|
||
|
||
gfxPoint blurStdDev = ComputeBlurStdDev(aBlurRadius, aAppUnitsPerDevPixel, scaleX, scaleY);
|
||
|
||
gfxRect dirtyRect =
|
||
nsLayoutUtils::RectToGfxRect(aDirtyRect, aAppUnitsPerDevPixel);
|
||
dirtyRect.RoundOut();
|
||
|
||
gfxRect shadowThebesRect = transform.TransformBounds(ThebesRect(shadowGfxRect));
|
||
dirtyRect = transform.TransformBounds(dirtyRect);
|
||
gfxRect skipRect = transform.TransformBounds(aSkipRect);
|
||
|
||
if (aCornerRadii) {
|
||
aCornerRadii->Scale(scaleX, scaleY);
|
||
}
|
||
|
||
gfxAlphaBoxBlur::BlurRectangle(aDestinationCtx,
|
||
shadowThebesRect,
|
||
aCornerRadii,
|
||
blurStdDev,
|
||
aShadowColor,
|
||
dirtyRect,
|
||
skipRect);
|
||
}
|
||
|
||
/* static */ void
|
||
nsContextBoxBlur::GetBlurAndSpreadRadius(DrawTarget* aDestDrawTarget,
|
||
int32_t aAppUnitsPerDevPixel,
|
||
nscoord aBlurRadius,
|
||
nscoord aSpreadRadius,
|
||
IntSize& aOutBlurRadius,
|
||
IntSize& aOutSpreadRadius,
|
||
bool aConstrainSpreadRadius)
|
||
{
|
||
// Do blurs in device space when possible.
|
||
// Chrome/Skia always does the blurs in device space
|
||
// and will sometimes get incorrect results (e.g. rotated blurs)
|
||
Matrix transform = aDestDrawTarget->GetTransform();
|
||
// XXX: we could probably handle negative scales but for now it's easier just to fallback
|
||
gfxFloat scaleX, scaleY;
|
||
if (transform.HasNonAxisAlignedTransform() || transform._11 <= 0.0 || transform._22 <= 0.0) {
|
||
scaleX = 1;
|
||
scaleY = 1;
|
||
} else {
|
||
scaleX = transform._11;
|
||
scaleY = transform._22;
|
||
}
|
||
|
||
// compute a large or smaller blur radius
|
||
aOutBlurRadius = ComputeBlurRadius(aBlurRadius, aAppUnitsPerDevPixel, scaleX, scaleY);
|
||
aOutSpreadRadius =
|
||
IntSize(int32_t(aSpreadRadius * scaleX / aAppUnitsPerDevPixel),
|
||
int32_t(aSpreadRadius * scaleY / aAppUnitsPerDevPixel));
|
||
|
||
|
||
if (aConstrainSpreadRadius) {
|
||
aOutSpreadRadius.width = std::min(aOutSpreadRadius.width, int32_t(MAX_SPREAD_RADIUS));
|
||
aOutSpreadRadius.height = std::min(aOutSpreadRadius.height, int32_t(MAX_SPREAD_RADIUS));
|
||
}
|
||
}
|
||
|
||
/* static */ bool
|
||
nsContextBoxBlur::InsetBoxBlur(gfxContext* aDestinationCtx,
|
||
Rect aDestinationRect,
|
||
Rect aShadowClipRect,
|
||
Color& aShadowColor,
|
||
nscoord aBlurRadiusAppUnits,
|
||
nscoord aSpreadDistanceAppUnits,
|
||
int32_t aAppUnitsPerDevPixel,
|
||
bool aHasBorderRadius,
|
||
RectCornerRadii& aInnerClipRectRadii,
|
||
Rect aSkipRect, Point aShadowOffset)
|
||
{
|
||
if (aDestinationRect.IsEmpty()) {
|
||
mContext = nullptr;
|
||
return false;
|
||
}
|
||
|
||
gfxContextAutoSaveRestore autoRestore(aDestinationCtx);
|
||
|
||
IntSize blurRadius;
|
||
IntSize spreadRadius;
|
||
// Convert the blur and spread radius to device pixels
|
||
bool constrainSpreadRadius = false;
|
||
GetBlurAndSpreadRadius(aDestinationCtx->GetDrawTarget(), aAppUnitsPerDevPixel,
|
||
aBlurRadiusAppUnits, aSpreadDistanceAppUnits,
|
||
blurRadius, spreadRadius, constrainSpreadRadius);
|
||
|
||
// The blur and spread radius are scaled already, so scale all
|
||
// input data to the blur. This way, we don't have to scale the min
|
||
// inset blur to the invert of the dest context, then rescale it back
|
||
// when we draw to the destination surface.
|
||
gfxSize scale = aDestinationCtx->CurrentMatrix().ScaleFactors(true);
|
||
Matrix transform = ToMatrix(aDestinationCtx->CurrentMatrix());
|
||
|
||
// XXX: we could probably handle negative scales but for now it's easier just to fallback
|
||
if (!transform.HasNonAxisAlignedTransform() && transform._11 > 0.0 && transform._22 > 0.0) {
|
||
// If we don't have a rotation, we're pre-transforming all the rects.
|
||
aDestinationCtx->SetMatrix(gfxMatrix());
|
||
} else {
|
||
// Don't touch anything, we have a rotation.
|
||
transform = Matrix();
|
||
}
|
||
|
||
Rect transformedDestRect = transform.TransformBounds(aDestinationRect);
|
||
Rect transformedShadowClipRect = transform.TransformBounds(aShadowClipRect);
|
||
Rect transformedSkipRect = transform.TransformBounds(aSkipRect);
|
||
|
||
transformedDestRect.Round();
|
||
transformedShadowClipRect.Round();
|
||
transformedSkipRect.RoundIn();
|
||
|
||
for (size_t i = 0; i < 4; i++) {
|
||
aInnerClipRectRadii[i].width = std::floor(scale.width * aInnerClipRectRadii[i].width);
|
||
aInnerClipRectRadii[i].height = std::floor(scale.height * aInnerClipRectRadii[i].height);
|
||
}
|
||
|
||
mAlphaBoxBlur.BlurInsetBox(aDestinationCtx, transformedDestRect,
|
||
transformedShadowClipRect,
|
||
blurRadius, aShadowColor,
|
||
aHasBorderRadius ? &aInnerClipRectRadii : nullptr,
|
||
transformedSkipRect, aShadowOffset);
|
||
return true;
|
||
}
|