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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/. */
#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:
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() {}
const std::vector<GradientStop>& GetStops() const
{
return mStops;
}
ExtendMode GetExtendMode() const
{
return mExtendMode;
}
virtual BackendType GetBackendType() const { return BACKEND_CAIRO; }
private:
std::vector<GradientStop> mStops;
ExtendMode mExtendMode;
};
class DrawTargetCairo : public DrawTarget
{
public:
DrawTargetCairo();
virtual ~DrawTargetCairo();
virtual BackendType GetType() const { return BACKEND_CAIRO; }
virtual TemporaryRef<SourceSurface> Snapshot();
virtual IntSize GetSize();
virtual void SetPermitSubpixelAA(bool aPermitSubpixelAA);
virtual void Flush();
virtual void DrawSurface(SourceSurface *aSurface,
const Rect &aDest,
const Rect &aSource,
const DrawSurfaceOptions &aSurfOptions = DrawSurfaceOptions(),
const DrawOptions &aOptions = DrawOptions());
virtual void DrawSurfaceWithShadow(SourceSurface *aSurface,
const Point &aDest,
const Color &aColor,
const Point &aOffset,
Float aSigma,
CompositionOp aOperator);
virtual void ClearRect(const Rect &aRect);
virtual void CopySurface(SourceSurface *aSurface,
const IntRect &aSourceRect,
const IntPoint &aDestination);
virtual void FillRect(const Rect &aRect,
const Pattern &aPattern,
const DrawOptions &aOptions = DrawOptions());
virtual void StrokeRect(const Rect &aRect,
const Pattern &aPattern,
const StrokeOptions &aStrokeOptions = StrokeOptions(),
const DrawOptions &aOptions = DrawOptions());
virtual void StrokeLine(const Point &aStart,
const Point &aEnd,
const Pattern &aPattern,
const StrokeOptions &aStrokeOptions = StrokeOptions(),
const DrawOptions &aOptions = DrawOptions());
virtual void Stroke(const Path *aPath,
const Pattern &aPattern,
const StrokeOptions &aStrokeOptions = StrokeOptions(),
const DrawOptions &aOptions = DrawOptions());
virtual void Fill(const Path *aPath,
const Pattern &aPattern,
const DrawOptions &aOptions = DrawOptions());
virtual void FillGlyphs(ScaledFont *aFont,
const GlyphBuffer &aBuffer,
const Pattern &aPattern,
const DrawOptions &aOptions,
const GlyphRenderingOptions *aRenderingOptions = nullptr);
virtual void Mask(const Pattern &aSource,
const Pattern &aMask,
const DrawOptions &aOptions = DrawOptions());
virtual void MaskSurface(const Pattern &aSource,
SourceSurface *aMask,
Point aOffset,
const DrawOptions &aOptions = DrawOptions()) { MOZ_ASSERT(0); };
virtual void PushClip(const Path *aPath);
virtual void PushClipRect(const Rect &aRect);
virtual void PopClip();
virtual TemporaryRef<PathBuilder> CreatePathBuilder(FillRule aFillRule = FILL_WINDING) const;
virtual TemporaryRef<SourceSurface> CreateSourceSurfaceFromData(unsigned char *aData,
const IntSize &aSize,
int32_t aStride,
SurfaceFormat aFormat) const;
virtual TemporaryRef<SourceSurface> OptimizeSourceSurface(SourceSurface *aSurface) const;
virtual TemporaryRef<SourceSurface>
CreateSourceSurfaceFromNativeSurface(const NativeSurface &aSurface) const;
virtual TemporaryRef<DrawTarget>
CreateSimilarDrawTarget(const IntSize &aSize, SurfaceFormat aFormat) const;
virtual TemporaryRef<DrawTarget>
CreateShadowDrawTarget(const IntSize &aSize, SurfaceFormat aFormat,
float aSigma) const;
virtual TemporaryRef<GradientStops>
CreateGradientStops(GradientStop *aStops,
uint32_t aNumStops,
ExtendMode aExtendMode = EXTEND_CLAMP) const;
virtual void *GetNativeSurface(NativeSurfaceType aType);
bool Init(cairo_surface_t* aSurface, const IntSize& aSize);
void SetPathObserver(CairoPathContext* aPathObserver);
virtual void SetTransform(const Matrix& aTransform);
// 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);
private: // methods
// Init cairo surface without doing a cairo_surface_reference() call.
bool InitAlreadyReferenced(cairo_surface_t* aSurface, const IntSize& aSize);
enum DrawPatternType { DRAW_FILL, DRAW_STROKE };
void DrawPattern(const Pattern& aPattern,
const StrokeOptions& aStrokeOptions,
const DrawOptions& aOptions,
DrawPatternType aDrawType);
// 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);
private: // data
cairo_t* mContext;
cairo_surface_t* mSurface;
IntSize mSize;
// 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;
// It is safe to use a regular pointer here because the CairoPathContext will
// deregister itself on destruction. Using a RefPtr would extend the life-
// span of the CairoPathContext. This causes a problem when
// PathBuilderCairo.Finish()
mutable CairoPathContext* mPathObserver;
};
}
}
#endif // _MOZILLA_GFX_DRAWTARGET_CAIRO_H_
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