gecko-dev/gfx/2d/DrawTargetTiled.cpp

300 строки
10 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#define _USE_MATH_DEFINES
#include <cmath>
#include "DrawTargetTiled.h"
#include "Logging.h"
using namespace std;
namespace mozilla {
namespace gfx {
DrawTargetTiled::DrawTargetTiled()
{
}
bool
DrawTargetTiled::Init(const TileSet& aTiles)
{
if (!aTiles.mTileCount) {
return false;
}
mTiles.reserve(aTiles.mTileCount);
for (size_t i = 0; i < aTiles.mTileCount; ++i) {
mTiles.push_back(TileInternal(aTiles.mTiles[i]));
if (!aTiles.mTiles[i].mDrawTarget) {
return false;
}
if (mTiles[0].mDrawTarget->GetFormat() != mTiles.back().mDrawTarget->GetFormat() ||
mTiles[0].mDrawTarget->GetBackendType() != mTiles.back().mDrawTarget->GetBackendType()) {
return false;
}
uint32_t newXMost = max(mRect.XMost(),
mTiles[i].mTileOrigin.x + mTiles[i].mDrawTarget->GetSize().width);
uint32_t newYMost = max(mRect.YMost(),
mTiles[i].mTileOrigin.y + mTiles[i].mDrawTarget->GetSize().height);
mRect.x = min(mRect.x, mTiles[i].mTileOrigin.x);
mRect.y = min(mRect.y, mTiles[i].mTileOrigin.y);
mRect.width = newXMost - mRect.x;
mRect.height = newYMost - mRect.y;
}
mFormat = mTiles[0].mDrawTarget->GetFormat();
return true;
}
TemporaryRef<SourceSurface>
DrawTargetTiled::Snapshot()
{
return new SnapshotTiled(mTiles, mRect);
}
// Skip the mClippedOut check since this is only used for Flush() which
// should happen even if we're clipped.
#define TILED_COMMAND(command) \
void \
DrawTargetTiled::command() \
{ \
for (size_t i = 0; i < mTiles.size(); i++) { \
mTiles[i].mDrawTarget->command(); \
} \
}
#define TILED_COMMAND1(command, type1) \
void \
DrawTargetTiled::command(type1 arg1) \
{ \
for (size_t i = 0; i < mTiles.size(); i++) { \
if (!mTiles[i].mClippedOut) \
mTiles[i].mDrawTarget->command(arg1); \
} \
}
#define TILED_COMMAND3(command, type1, type2, type3) \
void \
DrawTargetTiled::command(type1 arg1, type2 arg2, type3 arg3) \
{ \
for (size_t i = 0; i < mTiles.size(); i++) { \
if (!mTiles[i].mClippedOut) \
mTiles[i].mDrawTarget->command(arg1, arg2, arg3); \
} \
}
#define TILED_COMMAND4(command, type1, type2, type3, type4) \
void \
DrawTargetTiled::command(type1 arg1, type2 arg2, type3 arg3, type4 arg4) \
{ \
for (size_t i = 0; i < mTiles.size(); i++) { \
if (!mTiles[i].mClippedOut) \
mTiles[i].mDrawTarget->command(arg1, arg2, arg3, arg4); \
} \
}
#define TILED_COMMAND5(command, type1, type2, type3, type4, type5) \
void \
DrawTargetTiled::command(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) \
{ \
for (size_t i = 0; i < mTiles.size(); i++) { \
if (!mTiles[i].mClippedOut) \
mTiles[i].mDrawTarget->command(arg1, arg2, arg3, arg4, arg5); \
} \
}
TILED_COMMAND(Flush)
TILED_COMMAND4(DrawFilter, FilterNode*, const Rect&, const Point&, const DrawOptions&)
TILED_COMMAND1(ClearRect, const Rect&)
TILED_COMMAND4(MaskSurface, const Pattern&, SourceSurface*, Point, const DrawOptions&)
TILED_COMMAND4(StrokeRect, const Rect&, const Pattern&, const StrokeOptions&, const DrawOptions&)
TILED_COMMAND5(StrokeLine, const Point&, const Point&, const Pattern&, const StrokeOptions&, const DrawOptions&)
TILED_COMMAND5(FillGlyphs, ScaledFont*, const GlyphBuffer&, const Pattern&, const DrawOptions&, const GlyphRenderingOptions*)
TILED_COMMAND3(Mask, const Pattern&, const Pattern&, const DrawOptions&)
void
DrawTargetTiled::PushClip(const Path* aPath)
{
mClippedOutTilesStack.push_back(std::vector<uint32_t>());
std::vector<uint32_t>& clippedTiles = mClippedOutTilesStack.back();
Rect deviceRect = aPath->GetBounds(mTransform);
for (size_t i = 0; i < mTiles.size(); i++) {
if (!mTiles[i].mClippedOut) {
if (deviceRect.Intersects(Rect(mTiles[i].mTileOrigin.x,
mTiles[i].mTileOrigin.y,
mTiles[i].mDrawTarget->GetSize().width,
mTiles[i].mDrawTarget->GetSize().height))) {
mTiles[i].mDrawTarget->PushClip(aPath);
} else {
mTiles[i].mClippedOut = true;
clippedTiles.push_back(i);
}
}
}
}
void
DrawTargetTiled::PushClipRect(const Rect& aRect)
{
mClippedOutTilesStack.push_back(std::vector<uint32_t>());
std::vector<uint32_t>& clippedTiles = mClippedOutTilesStack.back();
Rect deviceRect = mTransform.TransformBounds(aRect);
for (size_t i = 0; i < mTiles.size(); i++) {
if (!mTiles[i].mClippedOut) {
if (deviceRect.Intersects(Rect(mTiles[i].mTileOrigin.x,
mTiles[i].mTileOrigin.y,
mTiles[i].mDrawTarget->GetSize().width,
mTiles[i].mDrawTarget->GetSize().height))) {
mTiles[i].mDrawTarget->PushClipRect(aRect);
} else {
mTiles[i].mClippedOut = true;
clippedTiles.push_back(i);
}
}
}
}
void
DrawTargetTiled::PopClip()
{
for (size_t i = 0; i < mTiles.size(); i++) {
if (!mTiles[i].mClippedOut) {
mTiles[i].mDrawTarget->PopClip();
}
}
std::vector<uint32_t>& clippedTiles = mClippedOutTilesStack.back();
for (size_t i = 0; i < clippedTiles.size(); i++) {
mTiles[clippedTiles[i]].mClippedOut = false;
}
mClippedOutTilesStack.pop_back();
}
void
DrawTargetTiled::CopySurface(SourceSurface *aSurface,
const IntRect &aSourceRect,
const IntPoint &aDestination)
{
// CopySurface ignores the transform, account for that here.
for (size_t i = 0; i < mTiles.size(); i++) {
IntRect src = aSourceRect;
src.x += mTiles[i].mTileOrigin.x;
src.width -= mTiles[i].mTileOrigin.x;
src.y = mTiles[i].mTileOrigin.y;
src.height -= mTiles[i].mTileOrigin.y;
if (src.width <= 0 || src.height <= 0) {
continue;
}
mTiles[i].mDrawTarget->CopySurface(aSurface, src, aDestination);
}
}
void
DrawTargetTiled::SetTransform(const Matrix& aTransform)
{
for (size_t i = 0; i < mTiles.size(); i++) {
Matrix mat = aTransform;
mat.PostTranslate(Float(-mTiles[i].mTileOrigin.x), Float(-mTiles[i].mTileOrigin.y));
mTiles[i].mDrawTarget->SetTransform(mat);
}
DrawTarget::SetTransform(aTransform);
}
void
DrawTargetTiled::DrawSurface(SourceSurface* aSurface, const Rect& aDest, const Rect& aSource, const DrawSurfaceOptions& aSurfaceOptions, const DrawOptions& aDrawOptions)
{
Rect deviceRect = mTransform.TransformBounds(aDest);
for (size_t i = 0; i < mTiles.size(); i++) {
if (!mTiles[i].mClippedOut &&
deviceRect.Intersects(Rect(mTiles[i].mTileOrigin.x,
mTiles[i].mTileOrigin.y,
mTiles[i].mDrawTarget->GetSize().width,
mTiles[i].mDrawTarget->GetSize().height))) {
mTiles[i].mDrawTarget->DrawSurface(aSurface, aDest, aSource, aSurfaceOptions, aDrawOptions);
}
}
}
void
DrawTargetTiled::FillRect(const Rect& aRect, const Pattern& aPattern, const DrawOptions& aDrawOptions)
{
Rect deviceRect = mTransform.TransformBounds(aRect);
for (size_t i = 0; i < mTiles.size(); i++) {
if (!mTiles[i].mClippedOut &&
deviceRect.Intersects(Rect(mTiles[i].mTileOrigin.x,
mTiles[i].mTileOrigin.y,
mTiles[i].mDrawTarget->GetSize().width,
mTiles[i].mDrawTarget->GetSize().height))) {
mTiles[i].mDrawTarget->FillRect(aRect, aPattern, aDrawOptions);
}
}
}
// The logic for this comes from _cairo_stroke_style_max_distance_from_path
static Rect
PathExtentsToMaxStrokeExtents(const StrokeOptions &aStrokeOptions,
const Rect &aRect,
const Matrix &aTransform)
{
double styleExpansionFactor = 0.5f;
if (aStrokeOptions.mLineCap == CapStyle::SQUARE) {
styleExpansionFactor = M_SQRT1_2;
}
if (aStrokeOptions.mLineJoin == JoinStyle::MITER &&
styleExpansionFactor < M_SQRT2 * aStrokeOptions.mMiterLimit) {
styleExpansionFactor = M_SQRT2 * aStrokeOptions.mMiterLimit;
}
styleExpansionFactor *= aStrokeOptions.mLineWidth;
double dx = styleExpansionFactor * hypot(aTransform._11, aTransform._21);
double dy = styleExpansionFactor * hypot(aTransform._22, aTransform._12);
Rect result = aRect;
result.Inflate(dx, dy);
return result;
}
void
DrawTargetTiled::Stroke(const Path* aPath, const Pattern& aPattern, const StrokeOptions& aStrokeOptions, const DrawOptions& aDrawOptions)
{
// Approximate the stroke extents, since Path::GetStrokeExtents can be slow
Rect deviceRect = PathExtentsToMaxStrokeExtents(aStrokeOptions,
aPath->GetBounds(mTransform),
mTransform);
for (size_t i = 0; i < mTiles.size(); i++) {
if (!mTiles[i].mClippedOut &&
deviceRect.Intersects(Rect(mTiles[i].mTileOrigin.x,
mTiles[i].mTileOrigin.y,
mTiles[i].mDrawTarget->GetSize().width,
mTiles[i].mDrawTarget->GetSize().height))) {
mTiles[i].mDrawTarget->Stroke(aPath, aPattern, aStrokeOptions, aDrawOptions);
}
}
}
void
DrawTargetTiled::Fill(const Path* aPath, const Pattern& aPattern, const DrawOptions& aDrawOptions)
{
Rect deviceRect = aPath->GetBounds(mTransform);
for (size_t i = 0; i < mTiles.size(); i++) {
if (!mTiles[i].mClippedOut &&
deviceRect.Intersects(Rect(mTiles[i].mTileOrigin.x,
mTiles[i].mTileOrigin.y,
mTiles[i].mDrawTarget->GetSize().width,
mTiles[i].mDrawTarget->GetSize().height))) {
mTiles[i].mDrawTarget->Fill(aPath, aPattern, aDrawOptions);
}
}
}
}
}