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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_DRAWTARGET_CAIRO_H_
#define _MOZILLA_GFX_DRAWTARGET_CAIRO_H_
#include "2D.h"
#include "cairo.h"
#include "PathCairo.h"
#include <vector>
namespace mozilla {
namespace gfx {
class SourceSurfaceCairo;
class GradientStopsCairo : public GradientStops {
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(GradientStopsCairo, override)
GradientStopsCairo(GradientStop* aStops, uint32_t aNumStops,
ExtendMode aExtendMode)
: mExtendMode(aExtendMode) {
for (uint32_t i = 0; i < aNumStops; ++i) {
mStops.push_back(aStops[i]);
}
}
virtual ~GradientStopsCairo() = default;
const std::vector<GradientStop>& GetStops() const { return mStops; }
ExtendMode GetExtendMode() const { return mExtendMode; }
virtual BackendType GetBackendType() const override {
return BackendType::CAIRO;
}
private:
std::vector<GradientStop> mStops;
ExtendMode mExtendMode;
};
class DrawTargetCairo final : public DrawTarget {
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawTargetCairo, override)
friend class BorrowedXlibDrawable;
DrawTargetCairo();
virtual ~DrawTargetCairo();
virtual bool IsValid() const override;
virtual DrawTargetType GetType() const override;
virtual BackendType GetBackendType() const override {
return BackendType::CAIRO;
}
virtual void Link(const char* aDestination, const Rect& aRect) override;
virtual void Destination(const char* aDestination,
const Point& aPoint) override;
virtual already_AddRefed<SourceSurface> Snapshot() override;
virtual IntSize GetSize() const override;
virtual bool IsCurrentGroupOpaque() override;
virtual void SetPermitSubpixelAA(bool aPermitSubpixelAA) override;
virtual bool LockBits(uint8_t** aData, IntSize* aSize, int32_t* aStride,
SurfaceFormat* aFormat,
IntPoint* aOrigin = nullptr) override;
virtual void ReleaseBits(uint8_t* aData) override;
virtual void Flush() override;
virtual void DrawSurface(
SourceSurface* aSurface, const Rect& aDest, const Rect& aSource,
const DrawSurfaceOptions& aSurfOptions = DrawSurfaceOptions(),
const DrawOptions& aOptions = DrawOptions()) 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 ShadowOptions& aShadow,
CompositionOp aOperator) override;
virtual void ClearRect(const Rect& aRect) 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) override;
virtual void Mask(const Pattern& aSource, const Pattern& aMask,
const DrawOptions& aOptions = DrawOptions()) override;
virtual void MaskSurface(
const Pattern& aSource, SourceSurface* aMask, Point aOffset,
const DrawOptions& aOptions = DrawOptions()) override;
virtual bool Draw3DTransformedSurface(SourceSurface* aSurface,
const Matrix4x4& aMatrix) 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 = IntRect(),
bool aCopyBackground = false) override;
virtual void PushLayerWithBlend(
bool aOpaque, Float aOpacity, SourceSurface* aMask,
const Matrix& aMaskTransform, const IntRect& aBounds = IntRect(),
bool aCopyBackground = false,
CompositionOp = CompositionOp::OP_OVER) override;
virtual void PopLayer() override;
virtual already_AddRefed<PathBuilder> CreatePathBuilder(
FillRule aFillRule = FillRule::FILL_WINDING) const override {
return PathBuilderCairo::Create(aFillRule);
}
virtual already_AddRefed<SourceSurface> CreateSourceSurfaceFromData(
unsigned char* aData, const IntSize& aSize, int32_t aStride,
SurfaceFormat aFormat) const override;
virtual already_AddRefed<SourceSurface> OptimizeSourceSurface(
SourceSurface* aSurface) const override;
virtual already_AddRefed<SourceSurface> CreateSourceSurfaceFromNativeSurface(
const NativeSurface& aSurface) const override;
virtual already_AddRefed<DrawTarget> CreateSimilarDrawTarget(
const IntSize& aSize, SurfaceFormat aFormat) const override;
virtual already_AddRefed<DrawTarget> CreateShadowDrawTarget(
const IntSize& aSize, SurfaceFormat aFormat, float aSigma) const override;
virtual RefPtr<DrawTarget> CreateClippedDrawTarget(
const Rect& aBounds, SurfaceFormat aFormat) override;
virtual already_AddRefed<GradientStops> CreateGradientStops(
GradientStop* aStops, uint32_t aNumStops,
ExtendMode aExtendMode = ExtendMode::CLAMP) const override;
virtual already_AddRefed<FilterNode> CreateFilter(FilterType aType) override;
virtual void* GetNativeSurface(NativeSurfaceType aType) override;
bool Init(cairo_surface_t* aSurface, const IntSize& aSize,
SurfaceFormat* aFormat = nullptr);
bool Init(const IntSize& aSize, SurfaceFormat aFormat);
bool Init(unsigned char* aData, const IntSize& aSize, int32_t aStride,
SurfaceFormat aFormat);
virtual void SetTransform(const Matrix& aTransform) override;
virtual void DetachAllSnapshots() override { MarkSnapshotIndependent(); }
// Call to set up aContext for drawing (with the current transform, etc).
// Pass the path you're going to be using if you have one.
// Implicitly calls WillChange(aPath).
void PrepareForDrawing(cairo_t* aContext, const Path* aPath = nullptr);
static cairo_surface_t* GetDummySurface();
// Cairo hardcodes this as its maximum surface size.
static size_t GetMaxSurfaceSize() { return 32766; }
private: // methods
// Init cairo surface without doing a cairo_surface_reference() call.
bool InitAlreadyReferenced(cairo_surface_t* aSurface, const IntSize& aSize,
SurfaceFormat* aFormat = nullptr);
enum DrawPatternType { DRAW_FILL, DRAW_STROKE };
void DrawPattern(const Pattern& aPattern, const StrokeOptions& aStrokeOptions,
const DrawOptions& aOptions, DrawPatternType aDrawType,
bool aPathBoundsClip = false);
void CopySurfaceInternal(cairo_surface_t* aSurface, const IntRect& aSource,
const IntPoint& aDest);
Rect GetUserSpaceClip() const;
// Call before you make any changes to the backing surface with which this
// context is associated. Pass the path you're going to be using if you have
// one.
void WillChange(const Path* aPath = nullptr);
// Call if there is any reason to disassociate the snapshot from this draw
// target; for example, because we're going to be destroyed.
void MarkSnapshotIndependent();
// If the current operator is "source" then clear the destination before we
// draw into it, to simulate the effect of an unbounded source operator.
void ClearSurfaceForUnboundedSource(const CompositionOp& aOperator);
// Set the Cairo context font options according to the current draw target
// font state.
void SetFontOptions(cairo_antialias_t aAAMode = CAIRO_ANTIALIAS_DEFAULT);
private: // data
cairo_t* mContext;
cairo_surface_t* mSurface;
IntSize mSize;
bool mTransformSingular;
uint8_t* mLockedBits;
cairo_font_options_t* mFontOptions;
struct PushedLayer {
PushedLayer(Float aOpacity, CompositionOp aCompositionOp,
bool aWasPermittingSubpixelAA)
: mOpacity(aOpacity),
mCompositionOp(aCompositionOp),
mMaskPattern(nullptr),
mWasPermittingSubpixelAA(aWasPermittingSubpixelAA) {}
Float mOpacity;
CompositionOp mCompositionOp;
cairo_pattern_t* mMaskPattern;
bool mWasPermittingSubpixelAA;
};
std::vector<PushedLayer> mPushedLayers;
// The latest snapshot of this surface. This needs to be told when this
// target is modified. We keep it alive as a cache.
RefPtr<SourceSurfaceCairo> mSnapshot;
static cairo_surface_t* mDummySurface;
};
} // namespace gfx
} // namespace mozilla
#endif // _MOZILLA_GFX_DRAWTARGET_CAIRO_H_
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