gecko-dev/gfx/2d/DrawTargetCapture.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#ifndef MOZILLA_GFX_DRAWTARGETCAPTURE_H_
#define MOZILLA_GFX_DRAWTARGETCAPTURE_H_
#include "2D.h"
#include "CaptureCommandList.h"
#include "Filters.h"
namespace mozilla {
namespace gfx {
class DrawingCommand;
class SourceSurfaceCapture;
class AlphaBoxBlur;
class DrawTargetCaptureImpl : public DrawTargetCapture {
friend class SourceSurfaceCapture;
public:
DrawTargetCaptureImpl(gfx::DrawTarget *aTarget, size_t aFlushBytes);
DrawTargetCaptureImpl(BackendType aBackend, const IntSize &aSize,
SurfaceFormat aFormat);
bool Init(const IntSize &aSize, DrawTarget *aRefDT);
void InitForData(int32_t aStride, size_t aSurfaceAllocationSize);
virtual BackendType GetBackendType() const override {
return mRefDT->GetBackendType();
}
virtual DrawTargetType GetType() const override { return mRefDT->GetType(); }
virtual bool IsCaptureDT() const override { return true; }
virtual already_AddRefed<SourceSurface> Snapshot() override;
virtual already_AddRefed<SourceSurface> IntoLuminanceSource(
LuminanceType aLuminanceType, float aOpacity) override;
virtual void SetPermitSubpixelAA(bool aPermitSubpixelAA) override;
virtual void DetachAllSnapshots() override;
virtual IntSize GetSize() const override { return mSize; }
virtual void Flush() override {}
virtual void DrawSurface(SourceSurface *aSurface, const Rect &aDest,
const Rect &aSource,
const DrawSurfaceOptions &aSurfOptions,
const DrawOptions &aOptions) override;
virtual void DrawFilter(FilterNode *aNode, const Rect &aSourceRect,
const Point &aDestPoint,
const DrawOptions &aOptions = DrawOptions()) override;
virtual void DrawSurfaceWithShadow(SourceSurface *aSurface,
const Point &aDest, const Color &aColor,
const Point &aOffset, Float aSigma,
CompositionOp aOperator) override;
virtual void ClearRect(const Rect &aRect) override;
virtual void MaskSurface(
const Pattern &aSource, SourceSurface *aMask, Point aOffset,
const DrawOptions &aOptions = DrawOptions()) override;
virtual void CopySurface(SourceSurface *aSurface, const IntRect &aSourceRect,
const IntPoint &aDestination) override;
virtual void CopyRect(const IntRect &aSourceRect,
const IntPoint &aDestination) override;
virtual void FillRect(const Rect &aRect, const Pattern &aPattern,
const DrawOptions &aOptions = DrawOptions()) override;
virtual void StrokeRect(const Rect &aRect, const Pattern &aPattern,
const StrokeOptions &aStrokeOptions = StrokeOptions(),
const DrawOptions &aOptions = DrawOptions()) override;
virtual void StrokeLine(const Point &aStart, const Point &aEnd,
const Pattern &aPattern,
const StrokeOptions &aStrokeOptions = StrokeOptions(),
const DrawOptions &aOptions = DrawOptions()) override;
virtual void Stroke(const Path *aPath, const Pattern &aPattern,
const StrokeOptions &aStrokeOptions = StrokeOptions(),
const DrawOptions &aOptions = DrawOptions()) override;
virtual void Fill(const Path *aPath, const Pattern &aPattern,
const DrawOptions &aOptions = DrawOptions()) override;
virtual void FillGlyphs(ScaledFont *aFont, const GlyphBuffer &aBuffer,
const Pattern &aPattern,
const DrawOptions &aOptions = DrawOptions()) override;
virtual void StrokeGlyphs(
ScaledFont *aFont, const GlyphBuffer &aBuffer, const Pattern &aPattern,
const StrokeOptions &aStrokeOptions = StrokeOptions(),
const DrawOptions &aOptions = DrawOptions()) override;
virtual void Mask(const Pattern &aSource, const Pattern &aMask,
const DrawOptions &aOptions = DrawOptions()) override;
virtual void PushClip(const Path *aPath) override;
virtual void PushClipRect(const Rect &aRect) override;
virtual void PopClip() override;
virtual void PushLayer(bool aOpaque, Float aOpacity, SourceSurface *aMask,
const Matrix &aMaskTransform, const IntRect &aBounds,
bool aCopyBackground) override;
virtual void PopLayer() override;
virtual void Blur(const AlphaBoxBlur &aBlur) override;
virtual void PadEdges(const IntRegion &aRegion) override;
virtual void SetTransform(const Matrix &aTransform) override;
virtual bool SupportsRegionClipping() const override {
return mRefDT->SupportsRegionClipping();
}
virtual already_AddRefed<SourceSurface> CreateSourceSurfaceFromData(
unsigned char *aData, const IntSize &aSize, int32_t aStride,
SurfaceFormat aFormat) const override {
return mRefDT->CreateSourceSurfaceFromData(aData, aSize, aStride, aFormat);
}
virtual already_AddRefed<SourceSurface> OptimizeSourceSurface(
SourceSurface *aSurface) const override;
virtual already_AddRefed<SourceSurface> CreateSourceSurfaceFromNativeSurface(
const NativeSurface &aSurface) const override {
return mRefDT->CreateSourceSurfaceFromNativeSurface(aSurface);
}
virtual already_AddRefed<DrawTarget> CreateSimilarDrawTarget(
const IntSize &aSize, SurfaceFormat aFormat) const override;
virtual RefPtr<DrawTarget> CreateSimilarRasterTarget(
const IntSize &aSize, SurfaceFormat aFormat) const override;
virtual already_AddRefed<PathBuilder> CreatePathBuilder(
FillRule aFillRule = FillRule::FILL_WINDING) const override {
return mRefDT->CreatePathBuilder(aFillRule);
}
virtual already_AddRefed<GradientStops> CreateGradientStops(
GradientStop *aStops, uint32_t aNumStops,
ExtendMode aExtendMode = ExtendMode::CLAMP) const override {
return mRefDT->CreateGradientStops(aStops, aNumStops, aExtendMode);
}
virtual already_AddRefed<FilterNode> CreateFilter(FilterType aType) override;
void ReplayToDrawTarget(DrawTarget *aDT, const Matrix &aTransform);
bool IsEmpty() const override;
void Dump() override;
protected:
virtual ~DrawTargetCaptureImpl();
void MarkChanged();
private:
void FlushCommandBuffer() {
ReplayToDrawTarget(mRefDT, Matrix());
mCommands.Clear();
}
// This storage system was used to minimize the amount of heap allocations
// that are required while recording. It should be noted there's no
// guarantees on the alignments of DrawingCommands allocated in this array.
template <typename T>
T *AppendToCommandList() {
if (T::AffectsSnapshot) {
MarkChanged();
}
if (mFlushBytes && mCommands.BufferWillAlloc<T>() &&
mCommands.BufferCapacity() > mFlushBytes) {
FlushCommandBuffer();
}
return mCommands.Append<T>();
}
template <typename T>
T *ReuseOrAppendToCommandList() {
if (T::AffectsSnapshot) {
MarkChanged();
}
if (mFlushBytes && mCommands.BufferWillAlloc<T>() &&
mCommands.BufferCapacity() > mFlushBytes) {
FlushCommandBuffer();
}
return mCommands.ReuseOrAppend<T>();
}
RefPtr<DrawTarget> mRefDT;
IntSize mSize;
RefPtr<SourceSurfaceCapture> mSnapshot;
// These are set if the draw target must be explicitly backed by data.
int32_t mStride;
size_t mSurfaceAllocationSize;
struct PushedLayer {
explicit PushedLayer(bool aOldPermitSubpixelAA)
: mOldPermitSubpixelAA(aOldPermitSubpixelAA) {}
bool mOldPermitSubpixelAA;
};
std::vector<PushedLayer> mPushedLayers;
CaptureCommandList mCommands;
size_t mFlushBytes;
};
} // namespace gfx
} // namespace mozilla
#endif /* MOZILLA_GFX_DRAWTARGETCAPTURE_H_ */