зеркало из https://github.com/mozilla/gecko-dev.git
312 строки
11 KiB
C++
312 строки
11 KiB
C++
/* 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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#include "SVGContextPaint.h"
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#include "gfxContext.h"
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#include "gfxUtils.h"
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#include "mozilla/gfx/2D.h"
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#include "nsIDocument.h"
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#include "nsSVGPaintServerFrame.h"
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#include "nsSVGEffects.h"
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#include "nsSVGPaintServerFrame.h"
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using namespace mozilla::gfx;
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namespace mozilla {
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/**
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* Stores in |aTargetPaint| information on how to reconstruct the current
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* fill or stroke pattern. Will also set the paint opacity to transparent if
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* the paint is set to "none".
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* @param aOuterContextPaint pattern information from the outer text context
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* @param aTargetPaint where to store the current pattern information
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* @param aFillOrStroke member pointer to the paint we are setting up
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* @param aProperty the frame property descriptor of the fill or stroke paint
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* server frame
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*/
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static void
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SetupInheritablePaint(const DrawTarget* aDrawTarget,
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const gfxMatrix& aContextMatrix,
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nsIFrame* aFrame,
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float& aOpacity,
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SVGContextPaint* aOuterContextPaint,
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SVGContextPaintImpl::Paint& aTargetPaint,
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nsStyleSVGPaint nsStyleSVG::*aFillOrStroke,
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nsSVGEffects::PaintingPropertyDescriptor aProperty)
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{
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const nsStyleSVG *style = aFrame->StyleSVG();
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nsSVGPaintServerFrame *ps =
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nsSVGEffects::GetPaintServer(aFrame, aFillOrStroke, aProperty);
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if (ps) {
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RefPtr<gfxPattern> pattern =
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ps->GetPaintServerPattern(aFrame, aDrawTarget, aContextMatrix,
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aFillOrStroke, aOpacity);
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if (pattern) {
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aTargetPaint.SetPaintServer(aFrame, aContextMatrix, ps);
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return;
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}
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}
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if (aOuterContextPaint) {
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RefPtr<gfxPattern> pattern;
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switch ((style->*aFillOrStroke).Type()) {
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case eStyleSVGPaintType_ContextFill:
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pattern = aOuterContextPaint->GetFillPattern(aDrawTarget, aOpacity,
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aContextMatrix);
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break;
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case eStyleSVGPaintType_ContextStroke:
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pattern = aOuterContextPaint->GetStrokePattern(aDrawTarget, aOpacity,
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aContextMatrix);
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break;
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default:
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;
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}
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if (pattern) {
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aTargetPaint.SetContextPaint(aOuterContextPaint, (style->*aFillOrStroke).Type());
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return;
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}
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}
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nscolor color =
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nsSVGUtils::GetFallbackOrPaintColor(aFrame->StyleContext(), aFillOrStroke);
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aTargetPaint.SetColor(color);
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}
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DrawMode
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SVGContextPaintImpl::Init(const DrawTarget* aDrawTarget,
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const gfxMatrix& aContextMatrix,
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nsIFrame* aFrame,
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SVGContextPaint* aOuterContextPaint)
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{
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DrawMode toDraw = DrawMode(0);
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const nsStyleSVG *style = aFrame->StyleSVG();
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// fill:
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if (style->mFill.Type() == eStyleSVGPaintType_None) {
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SetFillOpacity(0.0f);
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} else {
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float opacity = nsSVGUtils::GetOpacity(style->FillOpacitySource(),
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style->mFillOpacity,
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aOuterContextPaint);
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SetupInheritablePaint(aDrawTarget, aContextMatrix, aFrame,
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opacity, aOuterContextPaint,
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mFillPaint, &nsStyleSVG::mFill,
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nsSVGEffects::FillProperty());
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SetFillOpacity(opacity);
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toDraw |= DrawMode::GLYPH_FILL;
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}
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// stroke:
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if (style->mStroke.Type() == eStyleSVGPaintType_None) {
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SetStrokeOpacity(0.0f);
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} else {
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float opacity = nsSVGUtils::GetOpacity(style->StrokeOpacitySource(),
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style->mStrokeOpacity,
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aOuterContextPaint);
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SetupInheritablePaint(aDrawTarget, aContextMatrix, aFrame,
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opacity, aOuterContextPaint,
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mStrokePaint, &nsStyleSVG::mStroke,
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nsSVGEffects::StrokeProperty());
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SetStrokeOpacity(opacity);
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toDraw |= DrawMode::GLYPH_STROKE;
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}
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return toDraw;
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}
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void
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SVGContextPaint::InitStrokeGeometry(gfxContext* aContext,
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float devUnitsPerSVGUnit)
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{
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mStrokeWidth = aContext->CurrentLineWidth() / devUnitsPerSVGUnit;
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aContext->CurrentDash(mDashes, &mDashOffset);
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for (uint32_t i = 0; i < mDashes.Length(); i++) {
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mDashes[i] /= devUnitsPerSVGUnit;
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}
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mDashOffset /= devUnitsPerSVGUnit;
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}
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/* static */ SVGContextPaint*
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SVGContextPaint::GetContextPaint(nsIContent* aContent)
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{
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nsIDocument* ownerDoc = aContent->OwnerDoc();
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if (!ownerDoc->IsBeingUsedAsImage()) {
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return nullptr;
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}
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// XXX The SVGContextPaint that was passed to SetProperty was const. Ideally
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// we could and should re-apply that constness to the SVGContextPaint that
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// we get here (SVGImageContext is never changed after it is initialized).
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// Unfortunately lazy initialization of SVGContextPaint (which is a member of
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// SVGImageContext, and also conceptually never changes after construction)
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// prevents some of SVGContextPaint's conceptually const methods from being
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// const. Trying to fix SVGContextPaint (perhaps by using |mutable|) is a
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// bit of a headache so for now we punt on that, don't reapply the constness
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// to the SVGContextPaint here, and trust that no one will add code that
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// actually modifies the object.
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return static_cast<SVGContextPaint*>(
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ownerDoc->GetProperty(nsGkAtoms::svgContextPaint));
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}
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already_AddRefed<gfxPattern>
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SVGContextPaintImpl::GetFillPattern(const DrawTarget* aDrawTarget,
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float aOpacity,
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const gfxMatrix& aCTM)
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{
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return mFillPaint.GetPattern(aDrawTarget, aOpacity, &nsStyleSVG::mFill, aCTM);
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}
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already_AddRefed<gfxPattern>
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SVGContextPaintImpl::GetStrokePattern(const DrawTarget* aDrawTarget,
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float aOpacity,
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const gfxMatrix& aCTM)
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{
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return mStrokePaint.GetPattern(aDrawTarget, aOpacity, &nsStyleSVG::mStroke, aCTM);
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}
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already_AddRefed<gfxPattern>
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SVGContextPaintImpl::Paint::GetPattern(const DrawTarget* aDrawTarget,
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float aOpacity,
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nsStyleSVGPaint nsStyleSVG::*aFillOrStroke,
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const gfxMatrix& aCTM)
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{
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RefPtr<gfxPattern> pattern;
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if (mPatternCache.Get(aOpacity, getter_AddRefs(pattern))) {
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// Set the pattern matrix just in case it was messed with by a previous
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// caller. We should get the same matrix each time a pattern is constructed
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// so this should be fine.
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pattern->SetMatrix(aCTM * mPatternMatrix);
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return pattern.forget();
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}
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switch (mPaintType) {
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case eStyleSVGPaintType_None:
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pattern = new gfxPattern(Color());
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mPatternMatrix = gfxMatrix();
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break;
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case eStyleSVGPaintType_Color: {
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Color color = Color::FromABGR(mPaintDefinition.mColor);
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color.a *= aOpacity;
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pattern = new gfxPattern(color);
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mPatternMatrix = gfxMatrix();
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break;
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}
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case eStyleSVGPaintType_Server:
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pattern = mPaintDefinition.mPaintServerFrame->GetPaintServerPattern(mFrame,
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aDrawTarget,
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mContextMatrix,
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aFillOrStroke,
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aOpacity);
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{
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// m maps original-user-space to pattern space
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gfxMatrix m = pattern->GetMatrix();
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gfxMatrix deviceToOriginalUserSpace = mContextMatrix;
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if (!deviceToOriginalUserSpace.Invert()) {
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return nullptr;
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}
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// mPatternMatrix maps device space to pattern space via original user space
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mPatternMatrix = deviceToOriginalUserSpace * m;
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}
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pattern->SetMatrix(aCTM * mPatternMatrix);
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break;
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case eStyleSVGPaintType_ContextFill:
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pattern = mPaintDefinition.mContextPaint->GetFillPattern(aDrawTarget,
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aOpacity, aCTM);
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// Don't cache this. mContextPaint will have cached it anyway. If we
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// cache it, we'll have to compute mPatternMatrix, which is annoying.
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return pattern.forget();
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case eStyleSVGPaintType_ContextStroke:
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pattern = mPaintDefinition.mContextPaint->GetStrokePattern(aDrawTarget,
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aOpacity, aCTM);
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// Don't cache this. mContextPaint will have cached it anyway. If we
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// cache it, we'll have to compute mPatternMatrix, which is annoying.
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return pattern.forget();
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default:
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MOZ_ASSERT(false, "invalid paint type");
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return nullptr;
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}
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mPatternCache.Put(aOpacity, pattern);
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return pattern.forget();
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}
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AutoSetRestoreSVGContextPaint::AutoSetRestoreSVGContextPaint(
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const SVGContextPaint* aContextPaint,
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nsIDocument* aSVGDocument)
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: mSVGDocument(aSVGDocument)
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, mOuterContextPaint(aSVGDocument->GetProperty(nsGkAtoms::svgContextPaint))
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{
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// The way that we supply context paint is to temporarily set the context
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// paint on the owner document of the SVG that we're painting while it's
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// being painted.
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MOZ_ASSERT(aContextPaint);
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MOZ_ASSERT(aSVGDocument->IsBeingUsedAsImage(),
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"SVGContextPaint::GetContextPaint assumes this");
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if (mOuterContextPaint) {
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mSVGDocument->UnsetProperty(nsGkAtoms::svgContextPaint);
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}
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DebugOnly<nsresult> res =
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mSVGDocument->SetProperty(nsGkAtoms::svgContextPaint,
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const_cast<SVGContextPaint*>(aContextPaint));
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NS_WARNING_ASSERTION(NS_SUCCEEDED(res), "Failed to set context paint");
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}
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AutoSetRestoreSVGContextPaint::~AutoSetRestoreSVGContextPaint()
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{
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mSVGDocument->UnsetProperty(nsGkAtoms::svgContextPaint);
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if (mOuterContextPaint) {
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DebugOnly<nsresult> res =
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mSVGDocument->SetProperty(nsGkAtoms::svgContextPaint, mOuterContextPaint);
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NS_WARNING_ASSERTION(NS_SUCCEEDED(res), "Failed to restore context paint");
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}
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}
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// SVGEmbeddingContextPaint
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void
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SVGEmbeddingContextPaint::SetFill(nscolor aFill)
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{
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mFill = new gfxPattern(ToDeviceColor(aFill));
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}
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void
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SVGEmbeddingContextPaint::SetStroke(nscolor aStroke)
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{
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mStroke = new gfxPattern(ToDeviceColor(aStroke));
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}
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uint32_t
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SVGEmbeddingContextPaint::Hash() const
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{
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uint32_t hash = 0;
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Color color;
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if (mFill && mFill->GetSolidColor(color)) {
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hash = HashGeneric(hash, color.ToABGR());
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}
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if (mStroke && mStroke->GetSolidColor(color)) {
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hash = HashGeneric(hash, color.ToABGR());
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}
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return hash;
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}
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} // namespace mozilla
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