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

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23 KiB
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/* -*- 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/. */
#include "DrawTargetSkia.h"
#include "SourceSurfaceSkia.h"
#include "ScaledFontBase.h"
#include "skia/SkDevice.h"
#include "skia/SkTypeface.h"
#include "skia/SkGradientShader.h"
#include "skia/SkBlurDrawLooper.h"
#include "skia/SkBlurMaskFilter.h"
#include "skia/SkColorFilter.h"
#include "skia/SkLayerRasterizer.h"
#include "skia/SkLayerDrawLooper.h"
#include "skia/SkDashPathEffect.h"
#include "Logging.h"
#include "HelpersSkia.h"
#include "Tools.h"
#include <algorithm>
#ifdef ANDROID
# define USE_SOFT_CLIPPING false
#else
# define USE_SOFT_CLIPPING true
#endif
namespace mozilla {
namespace gfx {
SkColor ColorToSkColor(const Color &color, Float aAlpha)
{
//XXX: do a better job converting to int
return SkColorSetARGB(color.a*aAlpha*255.0, color.r*255.0, color.g*255.0, color.b*255.0);
}
class GradientStopsSkia : public GradientStops
{
public:
GradientStopsSkia(const std::vector<GradientStop>& aStops, uint32_t aNumStops, ExtendMode aExtendMode)
: mCount(aNumStops)
, mExtendMode(aExtendMode)
{
if (mCount == 0) {
return;
}
// Skia gradients always require a stop at 0.0 and 1.0, insert these if
// we don't have them.
uint32_t shift = 0;
if (aStops[0].offset != 0) {
mCount++;
shift = 1;
}
if (aStops[aNumStops-1].offset != 1) {
mCount++;
}
mColors.resize(mCount);
mPositions.resize(mCount);
if (aStops[0].offset != 0) {
mColors[0] = ColorToSkColor(aStops[0].color, 1.0);
mPositions[0] = 0;
}
for (uint32_t i = 0; i < aNumStops; i++) {
mColors[i + shift] = ColorToSkColor(aStops[i].color, 1.0);
mPositions[i + shift] = SkFloatToScalar(aStops[i].offset);
}
if (aStops[aNumStops-1].offset != 1) {
mColors[mCount-1] = ColorToSkColor(aStops[aNumStops-1].color, 1.0);
mPositions[mCount-1] = SK_Scalar1;
}
}
BackendType GetBackendType() const { return BACKEND_SKIA; }
std::vector<SkColor> mColors;
std::vector<SkScalar> mPositions;
int mCount;
ExtendMode mExtendMode;
};
SkXfermode::Mode
GfxOpToSkiaOp(CompositionOp op)
{
switch (op)
{
case OP_OVER:
return SkXfermode::kSrcOver_Mode;
case OP_ADD:
return SkXfermode::kPlus_Mode;
case OP_ATOP:
return SkXfermode::kSrcATop_Mode;
case OP_OUT:
return SkXfermode::kSrcOut_Mode;
case OP_IN:
return SkXfermode::kSrcIn_Mode;
case OP_SOURCE:
return SkXfermode::kSrc_Mode;
case OP_DEST_IN:
return SkXfermode::kDstIn_Mode;
case OP_DEST_OUT:
return SkXfermode::kDstOut_Mode;
case OP_DEST_OVER:
return SkXfermode::kDstOver_Mode;
case OP_DEST_ATOP:
return SkXfermode::kDstATop_Mode;
case OP_XOR:
return SkXfermode::kXor_Mode;
case OP_COUNT:
return SkXfermode::kSrcOver_Mode;
}
return SkXfermode::kSrcOver_Mode;
}
SkRect
RectToSkRect(const Rect& aRect)
{
return SkRect::MakeXYWH(SkFloatToScalar(aRect.x), SkFloatToScalar(aRect.y),
SkFloatToScalar(aRect.width), SkFloatToScalar(aRect.height));
}
SkRect
IntRectToSkRect(const IntRect& aRect)
{
return SkRect::MakeXYWH(SkIntToScalar(aRect.x), SkIntToScalar(aRect.y),
SkIntToScalar(aRect.width), SkIntToScalar(aRect.height));
}
SkIRect
RectToSkIRect(const Rect& aRect)
{
return SkIRect::MakeXYWH(aRect.x, aRect.y, aRect.width, aRect.height);
}
SkIRect
IntRectToSkIRect(const IntRect& aRect)
{
return SkIRect::MakeXYWH(aRect.x, aRect.y, aRect.width, aRect.height);
}
DrawTargetSkia::DrawTargetSkia()
{
}
DrawTargetSkia::~DrawTargetSkia()
{
if (mSnapshots.size()) {
for (std::vector<SourceSurfaceSkia*>::iterator iter = mSnapshots.begin();
iter != mSnapshots.end(); iter++) {
(*iter)->DrawTargetDestroyed();
}
// All snapshots will now have copied data.
mSnapshots.clear();
}
}
TemporaryRef<SourceSurface>
DrawTargetSkia::Snapshot()
{
RefPtr<SourceSurfaceSkia> source = new SourceSurfaceSkia();
if (!source->InitWithBitmap(mBitmap, mFormat, this)) {
return nullptr;
}
AppendSnapshot(source);
return source;
}
SkShader::TileMode
ExtendModeToTileMode(ExtendMode aMode)
{
switch (aMode)
{
case EXTEND_CLAMP:
return SkShader::kClamp_TileMode;
case EXTEND_REPEAT:
return SkShader::kRepeat_TileMode;
case EXTEND_REFLECT:
return SkShader::kMirror_TileMode;
}
return SkShader::kClamp_TileMode;
}
void SetPaintPattern(SkPaint& aPaint, const Pattern& aPattern, Float aAlpha = 1.0)
{
switch (aPattern.GetType()) {
case PATTERN_COLOR: {
Color color = static_cast<const ColorPattern&>(aPattern).mColor;
aPaint.setColor(ColorToSkColor(color, aAlpha));
break;
}
case PATTERN_LINEAR_GRADIENT: {
const LinearGradientPattern& pat = static_cast<const LinearGradientPattern&>(aPattern);
GradientStopsSkia *stops = static_cast<GradientStopsSkia*>(pat.mStops.get());
SkShader::TileMode mode = ExtendModeToTileMode(stops->mExtendMode);
if (stops->mCount >= 2) {
SkPoint points[2];
points[0] = SkPoint::Make(SkFloatToScalar(pat.mBegin.x), SkFloatToScalar(pat.mBegin.y));
points[1] = SkPoint::Make(SkFloatToScalar(pat.mEnd.x), SkFloatToScalar(pat.mEnd.y));
SkShader* shader = SkGradientShader::CreateLinear(points,
&stops->mColors.front(),
&stops->mPositions.front(),
stops->mCount,
mode);
if (shader) {
SkMatrix mat;
GfxMatrixToSkiaMatrix(pat.mMatrix, mat);
shader->setLocalMatrix(mat);
SkSafeUnref(aPaint.setShader(shader));
}
} else {
aPaint.setColor(SkColorSetARGB(0, 0, 0, 0));
}
break;
}
case PATTERN_RADIAL_GRADIENT: {
const RadialGradientPattern& pat = static_cast<const RadialGradientPattern&>(aPattern);
GradientStopsSkia *stops = static_cast<GradientStopsSkia*>(pat.mStops.get());
SkShader::TileMode mode = ExtendModeToTileMode(stops->mExtendMode);
if (stops->mCount >= 2) {
SkPoint points[2];
points[0] = SkPoint::Make(SkFloatToScalar(pat.mCenter1.x), SkFloatToScalar(pat.mCenter1.y));
points[1] = SkPoint::Make(SkFloatToScalar(pat.mCenter2.x), SkFloatToScalar(pat.mCenter2.y));
SkShader* shader = SkGradientShader::CreateTwoPointRadial(points[0],
SkFloatToScalar(pat.mRadius1),
points[1],
SkFloatToScalar(pat.mRadius2),
&stops->mColors.front(),
&stops->mPositions.front(),
stops->mCount,
mode);
if (shader) {
SkMatrix mat;
GfxMatrixToSkiaMatrix(pat.mMatrix, mat);
shader->setLocalMatrix(mat);
SkSafeUnref(aPaint.setShader(shader));
}
} else {
aPaint.setColor(SkColorSetARGB(0, 0, 0, 0));
}
break;
}
case PATTERN_SURFACE: {
const SurfacePattern& pat = static_cast<const SurfacePattern&>(aPattern);
const SkBitmap& bitmap = static_cast<SourceSurfaceSkia*>(pat.mSurface.get())->GetBitmap();
SkShader::TileMode mode = ExtendModeToTileMode(pat.mExtendMode);
SkShader* shader = SkShader::CreateBitmapShader(bitmap, mode, mode);
SkMatrix mat;
GfxMatrixToSkiaMatrix(pat.mMatrix, mat);
shader->setLocalMatrix(mat);
SkSafeUnref(aPaint.setShader(shader));
if (pat.mFilter == FILTER_POINT) {
aPaint.setFilterBitmap(false);
}
break;
}
}
}
struct AutoPaintSetup {
AutoPaintSetup(SkCanvas *aCanvas, const DrawOptions& aOptions, const Pattern& aPattern)
: mNeedsRestore(false), mAlpha(1.0)
{
Init(aCanvas, aOptions);
SetPaintPattern(mPaint, aPattern, mAlpha);
}
AutoPaintSetup(SkCanvas *aCanvas, const DrawOptions& aOptions)
: mNeedsRestore(false), mAlpha(1.0)
{
Init(aCanvas, aOptions);
}
~AutoPaintSetup()
{
if (mNeedsRestore) {
mCanvas->restore();
}
}
void Init(SkCanvas *aCanvas, const DrawOptions& aOptions)
{
mPaint.setXfermodeMode(GfxOpToSkiaOp(aOptions.mCompositionOp));
mCanvas = aCanvas;
//TODO: Can we set greyscale somehow?
if (aOptions.mAntialiasMode != AA_NONE) {
mPaint.setAntiAlias(true);
} else {
mPaint.setAntiAlias(false);
}
MOZ_ASSERT(aOptions.mSnapping == SNAP_NONE, "Pixel snapping not supported yet!");
// TODO: We could skip the temporary for operator_source and just
// clear the clip rect. The other operators would be harder
// but could be worth it to skip pushing a group.
if (!IsOperatorBoundByMask(aOptions.mCompositionOp)) {
mPaint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
SkPaint temp;
temp.setXfermodeMode(GfxOpToSkiaOp(aOptions.mCompositionOp));
temp.setAlpha(aOptions.mAlpha*255);
//TODO: Get a rect here
mCanvas->saveLayer(nullptr, &temp);
mNeedsRestore = true;
} else {
mPaint.setAlpha(aOptions.mAlpha*255.0);
mAlpha = aOptions.mAlpha;
}
mPaint.setFilterBitmap(true);
}
// TODO: Maybe add an operator overload to access this easier?
SkPaint mPaint;
bool mNeedsRestore;
SkCanvas* mCanvas;
Float mAlpha;
};
void
DrawTargetSkia::Flush()
{
}
void
DrawTargetSkia::DrawSurface(SourceSurface *aSurface,
const Rect &aDest,
const Rect &aSource,
const DrawSurfaceOptions &aSurfOptions,
const DrawOptions &aOptions)
{
if (aSurface->GetType() != SURFACE_SKIA) {
return;
}
if (aSource.IsEmpty()) {
return;
}
MarkChanged();
SkRect destRect = RectToSkRect(aDest);
SkRect sourceRect = RectToSkRect(aSource);
SkMatrix matrix;
matrix.setRectToRect(sourceRect, destRect, SkMatrix::kFill_ScaleToFit);
const SkBitmap& bitmap = static_cast<SourceSurfaceSkia*>(aSurface)->GetBitmap();
AutoPaintSetup paint(mCanvas.get(), aOptions);
SkShader *shader = SkShader::CreateBitmapShader(bitmap, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
shader->setLocalMatrix(matrix);
SkSafeUnref(paint.mPaint.setShader(shader));
if (aSurfOptions.mFilter != FILTER_LINEAR) {
paint.mPaint.setFilterBitmap(false);
}
mCanvas->drawRect(destRect, paint.mPaint);
}
void
DrawTargetSkia::DrawSurfaceWithShadow(SourceSurface *aSurface,
const Point &aDest,
const Color &aColor,
const Point &aOffset,
Float aSigma,
CompositionOp aOperator)
{
MarkChanged();
mCanvas->save(SkCanvas::kMatrix_SaveFlag);
mCanvas->resetMatrix();
uint32_t blurFlags = SkBlurMaskFilter::kHighQuality_BlurFlag |
SkBlurMaskFilter::kIgnoreTransform_BlurFlag;
const SkBitmap& bitmap = static_cast<SourceSurfaceSkia*>(aSurface)->GetBitmap();
SkShader* shader = SkShader::CreateBitmapShader(bitmap, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
SkMatrix matrix;
matrix.reset();
matrix.setTranslateX(SkFloatToScalar(aDest.x));
matrix.setTranslateY(SkFloatToScalar(aDest.y));
shader->setLocalMatrix(matrix);
SkLayerDrawLooper* dl = new SkLayerDrawLooper;
SkLayerDrawLooper::LayerInfo info;
info.fPaintBits |= SkLayerDrawLooper::kShader_Bit;
SkPaint *layerPaint = dl->addLayer(info);
layerPaint->setShader(shader);
info.fPaintBits = 0;
info.fPaintBits |= SkLayerDrawLooper::kMaskFilter_Bit;
info.fPaintBits |= SkLayerDrawLooper::kColorFilter_Bit;
info.fColorMode = SkXfermode::kDst_Mode;
info.fOffset.set(SkFloatToScalar(aOffset.x), SkFloatToScalar(aOffset.y));
info.fPostTranslate = true;
SkMaskFilter* mf = SkBlurMaskFilter::Create(aSigma, SkBlurMaskFilter::kNormal_BlurStyle, blurFlags);
SkColor color = ColorToSkColor(aColor, 1);
SkColorFilter* cf = SkColorFilter::CreateModeFilter(color, SkXfermode::kSrcIn_Mode);
layerPaint = dl->addLayer(info);
SkSafeUnref(layerPaint->setMaskFilter(mf));
SkSafeUnref(layerPaint->setColorFilter(cf));
layerPaint->setColor(color);
// TODO: This is using the rasterizer to calculate an alpha mask
// on both the shadow and normal layers. We should fix this
// properly so it only happens for the shadow layer
SkLayerRasterizer *raster = new SkLayerRasterizer();
SkPaint maskPaint;
SkSafeUnref(maskPaint.setShader(shader));
raster->addLayer(maskPaint, 0, 0);
SkPaint paint;
paint.setAntiAlias(true);
SkSafeUnref(paint.setRasterizer(raster));
paint.setXfermodeMode(GfxOpToSkiaOp(aOperator));
SkSafeUnref(paint.setLooper(dl));
SkRect rect = RectToSkRect(Rect(aDest.x, aDest.y, bitmap.width(), bitmap.height()));
mCanvas->drawRect(rect, paint);
mCanvas->restore();
}
void
DrawTargetSkia::FillRect(const Rect &aRect,
const Pattern &aPattern,
const DrawOptions &aOptions)
{
MarkChanged();
SkRect rect = RectToSkRect(aRect);
AutoPaintSetup paint(mCanvas.get(), aOptions, aPattern);
mCanvas->drawRect(rect, paint.mPaint);
}
void
DrawTargetSkia::Stroke(const Path *aPath,
const Pattern &aPattern,
const StrokeOptions &aStrokeOptions,
const DrawOptions &aOptions)
{
MarkChanged();
MOZ_ASSERT(aPath, "Null path");
if (aPath->GetBackendType() != BACKEND_SKIA) {
return;
}
const PathSkia *skiaPath = static_cast<const PathSkia*>(aPath);
AutoPaintSetup paint(mCanvas.get(), aOptions, aPattern);
if (!StrokeOptionsToPaint(paint.mPaint, aStrokeOptions)) {
return;
}
mCanvas->drawPath(skiaPath->GetPath(), paint.mPaint);
}
void
DrawTargetSkia::StrokeRect(const Rect &aRect,
const Pattern &aPattern,
const StrokeOptions &aStrokeOptions,
const DrawOptions &aOptions)
{
MarkChanged();
AutoPaintSetup paint(mCanvas.get(), aOptions, aPattern);
if (!StrokeOptionsToPaint(paint.mPaint, aStrokeOptions)) {
return;
}
mCanvas->drawRect(RectToSkRect(aRect), paint.mPaint);
}
void
DrawTargetSkia::StrokeLine(const Point &aStart,
const Point &aEnd,
const Pattern &aPattern,
const StrokeOptions &aStrokeOptions,
const DrawOptions &aOptions)
{
MarkChanged();
AutoPaintSetup paint(mCanvas.get(), aOptions, aPattern);
if (!StrokeOptionsToPaint(paint.mPaint, aStrokeOptions)) {
return;
}
mCanvas->drawLine(SkFloatToScalar(aStart.x), SkFloatToScalar(aStart.y),
SkFloatToScalar(aEnd.x), SkFloatToScalar(aEnd.y),
paint.mPaint);
}
void
DrawTargetSkia::Fill(const Path *aPath,
const Pattern &aPattern,
const DrawOptions &aOptions)
{
MarkChanged();
if (aPath->GetBackendType() != BACKEND_SKIA) {
return;
}
const PathSkia *skiaPath = static_cast<const PathSkia*>(aPath);
AutoPaintSetup paint(mCanvas.get(), aOptions, aPattern);
mCanvas->drawPath(skiaPath->GetPath(), paint.mPaint);
}
void
DrawTargetSkia::FillGlyphs(ScaledFont *aFont,
const GlyphBuffer &aBuffer,
const Pattern &aPattern,
const DrawOptions &aOptions,
const GlyphRenderingOptions*)
{
if (aFont->GetType() != FONT_MAC &&
aFont->GetType() != FONT_SKIA &&
aFont->GetType() != FONT_GDI) {
return;
}
MarkChanged();
ScaledFontBase* skiaFont = static_cast<ScaledFontBase*>(aFont);
AutoPaintSetup paint(mCanvas.get(), aOptions, aPattern);
paint.mPaint.setTypeface(skiaFont->GetSkTypeface());
paint.mPaint.setTextSize(SkFloatToScalar(skiaFont->mSize));
paint.mPaint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
std::vector<uint16_t> indices;
std::vector<SkPoint> offsets;
indices.resize(aBuffer.mNumGlyphs);
offsets.resize(aBuffer.mNumGlyphs);
for (unsigned int i = 0; i < aBuffer.mNumGlyphs; i++) {
indices[i] = aBuffer.mGlyphs[i].mIndex;
offsets[i].fX = SkFloatToScalar(aBuffer.mGlyphs[i].mPosition.x);
offsets[i].fY = SkFloatToScalar(aBuffer.mGlyphs[i].mPosition.y);
}
mCanvas->drawPosText(&indices.front(), aBuffer.mNumGlyphs*2, &offsets.front(), paint.mPaint);
}
void
DrawTargetSkia::Mask(const Pattern &aSource,
const Pattern &aMask,
const DrawOptions &aOptions)
{
MarkChanged();
AutoPaintSetup paint(mCanvas.get(), aOptions, aSource);
SkPaint maskPaint;
SetPaintPattern(maskPaint, aMask);
SkLayerRasterizer *raster = new SkLayerRasterizer();
raster->addLayer(maskPaint);
SkSafeUnref(paint.mPaint.setRasterizer(raster));
// Skia only uses the mask rasterizer when we are drawing a path/rect.
// Take our destination bounds and convert them into user space to use
// as the path to draw.
SkPath path;
path.addRect(SkRect::MakeWH(mSize.width, mSize.height));
Matrix temp = mTransform;
temp.Invert();
SkMatrix mat;
GfxMatrixToSkiaMatrix(temp, mat);
path.transform(mat);
mCanvas->drawPath(path, paint.mPaint);
}
TemporaryRef<SourceSurface>
DrawTargetSkia::CreateSourceSurfaceFromData(unsigned char *aData,
const IntSize &aSize,
int32_t aStride,
SurfaceFormat aFormat) const
{
RefPtr<SourceSurfaceSkia> newSurf = new SourceSurfaceSkia();
if (!newSurf->InitFromData(aData, aSize, aStride, aFormat)) {
gfxDebug() << *this << ": Failure to create source surface from data. Size: " << aSize;
return nullptr;
}
return newSurf;
}
TemporaryRef<DrawTarget>
DrawTargetSkia::CreateSimilarDrawTarget(const IntSize &aSize, SurfaceFormat aFormat) const
{
RefPtr<DrawTargetSkia> target = new DrawTargetSkia();
if (!target->Init(aSize, aFormat)) {
return nullptr;
}
return target;
}
TemporaryRef<SourceSurface>
DrawTargetSkia::OptimizeSourceSurface(SourceSurface *aSurface) const
{
return nullptr;
}
TemporaryRef<SourceSurface>
DrawTargetSkia::CreateSourceSurfaceFromNativeSurface(const NativeSurface &aSurface) const
{
return nullptr;
}
void
DrawTargetSkia::CopySurface(SourceSurface *aSurface,
const IntRect& aSourceRect,
const IntPoint &aDestination)
{
//TODO: We could just use writePixels() here if the sourceRect is the entire source
if (aSurface->GetType() != SURFACE_SKIA) {
return;
}
MarkChanged();
const SkBitmap& bitmap = static_cast<SourceSurfaceSkia*>(aSurface)->GetBitmap();
mCanvas->save();
mCanvas->resetMatrix();
SkRect dest = IntRectToSkRect(IntRect(aDestination.x, aDestination.y, aSourceRect.width, aSourceRect.height));
SkIRect source = IntRectToSkIRect(aSourceRect);
mCanvas->clipRect(dest, SkRegion::kReplace_Op);
SkPaint paint;
if (mBitmap.config() == SkBitmap::kRGB_565_Config &&
mCanvas->getDevice()->config() == SkBitmap::kRGB_565_Config) {
// Set the xfermode to SOURCE_OVER to workaround
// http://code.google.com/p/skia/issues/detail?id=628
// RGB565 is opaque so they're equivalent anyway
paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
} else {
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
}
mCanvas->drawBitmapRect(bitmap, &source, dest, &paint);
mCanvas->restore();
}
bool
DrawTargetSkia::Init(const IntSize &aSize, SurfaceFormat aFormat)
{
mBitmap.setConfig(GfxFormatToSkiaConfig(aFormat), aSize.width, aSize.height);
if (!mBitmap.allocPixels()) {
return false;
}
mBitmap.eraseARGB(0, 0, 0, 0);
SkAutoTUnref<SkDevice> device(new SkDevice(mBitmap));
SkAutoTUnref<SkCanvas> canvas(new SkCanvas(device.get()));
mSize = aSize;
mDevice = device.get();
mCanvas = canvas.get();
mFormat = aFormat;
return true;
}
void
DrawTargetSkia::Init(unsigned char* aData, const IntSize &aSize, int32_t aStride, SurfaceFormat aFormat)
{
mBitmap.setConfig(GfxFormatToSkiaConfig(aFormat), aSize.width, aSize.height, aStride);
mBitmap.setPixels(aData);
SkAutoTUnref<SkDevice> device(new SkDevice(mBitmap));
SkAutoTUnref<SkCanvas> canvas(new SkCanvas(device.get()));
mSize = aSize;
mDevice = device.get();
mCanvas = canvas.get();
mFormat = aFormat;
}
void
DrawTargetSkia::SetTransform(const Matrix& aTransform)
{
SkMatrix mat;
GfxMatrixToSkiaMatrix(aTransform, mat);
mCanvas->setMatrix(mat);
mTransform = aTransform;
}
TemporaryRef<PathBuilder>
DrawTargetSkia::CreatePathBuilder(FillRule aFillRule) const
{
RefPtr<PathBuilderSkia> pb = new PathBuilderSkia(aFillRule);
return pb;
}
void
DrawTargetSkia::ClearRect(const Rect &aRect)
{
MarkChanged();
SkPaint paint;
mCanvas->save();
mCanvas->clipRect(RectToSkRect(aRect), SkRegion::kIntersect_Op, USE_SOFT_CLIPPING);
paint.setColor(SkColorSetARGB(0, 0, 0, 0));
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
mCanvas->drawPaint(paint);
mCanvas->restore();
}
void
DrawTargetSkia::PushClip(const Path *aPath)
{
if (aPath->GetBackendType() != BACKEND_SKIA) {
return;
}
const PathSkia *skiaPath = static_cast<const PathSkia*>(aPath);
mCanvas->save(SkCanvas::kClip_SaveFlag);
mCanvas->clipPath(skiaPath->GetPath(), SkRegion::kIntersect_Op, USE_SOFT_CLIPPING);
}
void
DrawTargetSkia::PushClipRect(const Rect& aRect)
{
SkRect rect = RectToSkRect(aRect);
mCanvas->save(SkCanvas::kClip_SaveFlag);
mCanvas->clipRect(rect, SkRegion::kIntersect_Op, USE_SOFT_CLIPPING);
}
void
DrawTargetSkia::PopClip()
{
mCanvas->restore();
}
TemporaryRef<GradientStops>
DrawTargetSkia::CreateGradientStops(GradientStop *aStops, uint32_t aNumStops, ExtendMode aExtendMode) const
{
std::vector<GradientStop> stops;
stops.resize(aNumStops);
for (uint32_t i = 0; i < aNumStops; i++) {
stops[i] = aStops[i];
}
std::stable_sort(stops.begin(), stops.end());
return new GradientStopsSkia(stops, aNumStops, aExtendMode);
}
void
DrawTargetSkia::AppendSnapshot(SourceSurfaceSkia* aSnapshot)
{
mSnapshots.push_back(aSnapshot);
}
void
DrawTargetSkia::RemoveSnapshot(SourceSurfaceSkia* aSnapshot)
{
std::vector<SourceSurfaceSkia*>::iterator iter = std::find(mSnapshots.begin(), mSnapshots.end(), aSnapshot);
if (iter != mSnapshots.end()) {
mSnapshots.erase(iter);
}
}
void
DrawTargetSkia::MarkChanged()
{
if (mSnapshots.size()) {
for (std::vector<SourceSurfaceSkia*>::iterator iter = mSnapshots.begin();
iter != mSnapshots.end(); iter++) {
(*iter)->DrawTargetWillChange();
}
// All snapshots will now have copied data.
mSnapshots.clear();
}
}
}
}
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