1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/2d/DrawTargetCairo.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,216 @@
1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef _MOZILLA_GFX_DRAWTARGET_CAIRO_H_
1.10 +#define _MOZILLA_GFX_DRAWTARGET_CAIRO_H_
1.11 +
1.12 +#include "2D.h"
1.13 +#include "cairo.h"
1.14 +#include "PathCairo.h"
1.15 +
1.16 +#include <vector>
1.17 +
1.18 +namespace mozilla {
1.19 +namespace gfx {
1.20 +
1.21 +class SourceSurfaceCairo;
1.22 +
1.23 +class GradientStopsCairo : public GradientStops
1.24 +{
1.25 + public:
1.26 + MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(GradientStopsCairo)
1.27 + GradientStopsCairo(GradientStop* aStops, uint32_t aNumStops,
1.28 + ExtendMode aExtendMode)
1.29 + : mExtendMode(aExtendMode)
1.30 + {
1.31 + for (uint32_t i = 0; i < aNumStops; ++i) {
1.32 + mStops.push_back(aStops[i]);
1.33 + }
1.34 + }
1.35 +
1.36 + virtual ~GradientStopsCairo() {}
1.37 +
1.38 + const std::vector<GradientStop>& GetStops() const
1.39 + {
1.40 + return mStops;
1.41 + }
1.42 +
1.43 + ExtendMode GetExtendMode() const
1.44 + {
1.45 + return mExtendMode;
1.46 + }
1.47 +
1.48 + virtual BackendType GetBackendType() const { return BackendType::CAIRO; }
1.49 +
1.50 + private:
1.51 + std::vector<GradientStop> mStops;
1.52 + ExtendMode mExtendMode;
1.53 +};
1.54 +
1.55 +class DrawTargetCairo : public DrawTarget
1.56 +{
1.57 +public:
1.58 + MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawTargetCairo)
1.59 + friend class BorrowedCairoContext;
1.60 +
1.61 + DrawTargetCairo();
1.62 + virtual ~DrawTargetCairo();
1.63 +
1.64 + virtual BackendType GetType() const { return BackendType::CAIRO; }
1.65 + virtual TemporaryRef<SourceSurface> Snapshot();
1.66 + virtual IntSize GetSize();
1.67 +
1.68 + virtual void SetPermitSubpixelAA(bool aPermitSubpixelAA);
1.69 +
1.70 + virtual bool LockBits(uint8_t** aData, IntSize* aSize,
1.71 + int32_t* aStride, SurfaceFormat* aFormat);
1.72 + virtual void ReleaseBits(uint8_t* aData);
1.73 +
1.74 + virtual void Flush();
1.75 + virtual void DrawSurface(SourceSurface *aSurface,
1.76 + const Rect &aDest,
1.77 + const Rect &aSource,
1.78 + const DrawSurfaceOptions &aSurfOptions = DrawSurfaceOptions(),
1.79 + const DrawOptions &aOptions = DrawOptions());
1.80 + virtual void DrawFilter(FilterNode *aNode,
1.81 + const Rect &aSourceRect,
1.82 + const Point &aDestPoint,
1.83 + const DrawOptions &aOptions = DrawOptions());
1.84 + virtual void DrawSurfaceWithShadow(SourceSurface *aSurface,
1.85 + const Point &aDest,
1.86 + const Color &aColor,
1.87 + const Point &aOffset,
1.88 + Float aSigma,
1.89 + CompositionOp aOperator);
1.90 +
1.91 + virtual void ClearRect(const Rect &aRect);
1.92 +
1.93 + virtual void CopySurface(SourceSurface *aSurface,
1.94 + const IntRect &aSourceRect,
1.95 + const IntPoint &aDestination);
1.96 + virtual void CopyRect(const IntRect &aSourceRect,
1.97 + const IntPoint &aDestination);
1.98 +
1.99 + virtual void FillRect(const Rect &aRect,
1.100 + const Pattern &aPattern,
1.101 + const DrawOptions &aOptions = DrawOptions());
1.102 + virtual void StrokeRect(const Rect &aRect,
1.103 + const Pattern &aPattern,
1.104 + const StrokeOptions &aStrokeOptions = StrokeOptions(),
1.105 + const DrawOptions &aOptions = DrawOptions());
1.106 + virtual void StrokeLine(const Point &aStart,
1.107 + const Point &aEnd,
1.108 + const Pattern &aPattern,
1.109 + const StrokeOptions &aStrokeOptions = StrokeOptions(),
1.110 + const DrawOptions &aOptions = DrawOptions());
1.111 +
1.112 + virtual void Stroke(const Path *aPath,
1.113 + const Pattern &aPattern,
1.114 + const StrokeOptions &aStrokeOptions = StrokeOptions(),
1.115 + const DrawOptions &aOptions = DrawOptions());
1.116 +
1.117 + virtual void Fill(const Path *aPath,
1.118 + const Pattern &aPattern,
1.119 + const DrawOptions &aOptions = DrawOptions());
1.120 +
1.121 + virtual void FillGlyphs(ScaledFont *aFont,
1.122 + const GlyphBuffer &aBuffer,
1.123 + const Pattern &aPattern,
1.124 + const DrawOptions &aOptions,
1.125 + const GlyphRenderingOptions *aRenderingOptions = nullptr);
1.126 + virtual void Mask(const Pattern &aSource,
1.127 + const Pattern &aMask,
1.128 + const DrawOptions &aOptions = DrawOptions());
1.129 + virtual void MaskSurface(const Pattern &aSource,
1.130 + SourceSurface *aMask,
1.131 + Point aOffset,
1.132 + const DrawOptions &aOptions = DrawOptions());
1.133 +
1.134 + virtual void PushClip(const Path *aPath);
1.135 + virtual void PushClipRect(const Rect &aRect);
1.136 + virtual void PopClip();
1.137 +
1.138 + virtual TemporaryRef<PathBuilder> CreatePathBuilder(FillRule aFillRule = FillRule::FILL_WINDING) const;
1.139 +
1.140 + virtual TemporaryRef<SourceSurface> CreateSourceSurfaceFromData(unsigned char *aData,
1.141 + const IntSize &aSize,
1.142 + int32_t aStride,
1.143 + SurfaceFormat aFormat) const;
1.144 + virtual TemporaryRef<SourceSurface> OptimizeSourceSurface(SourceSurface *aSurface) const;
1.145 + virtual TemporaryRef<SourceSurface>
1.146 + CreateSourceSurfaceFromNativeSurface(const NativeSurface &aSurface) const;
1.147 + virtual TemporaryRef<DrawTarget>
1.148 + CreateSimilarDrawTarget(const IntSize &aSize, SurfaceFormat aFormat) const;
1.149 + virtual TemporaryRef<DrawTarget>
1.150 + CreateShadowDrawTarget(const IntSize &aSize, SurfaceFormat aFormat,
1.151 + float aSigma) const;
1.152 +
1.153 + virtual TemporaryRef<GradientStops>
1.154 + CreateGradientStops(GradientStop *aStops,
1.155 + uint32_t aNumStops,
1.156 + ExtendMode aExtendMode = ExtendMode::CLAMP) const;
1.157 +
1.158 + virtual TemporaryRef<FilterNode> CreateFilter(FilterType aType);
1.159 +
1.160 + virtual void *GetNativeSurface(NativeSurfaceType aType);
1.161 +
1.162 + bool Init(cairo_surface_t* aSurface, const IntSize& aSize, SurfaceFormat* aFormat = nullptr);
1.163 + bool Init(const IntSize& aSize, SurfaceFormat aFormat);
1.164 + bool Init(unsigned char* aData, const IntSize &aSize, int32_t aStride, SurfaceFormat aFormat);
1.165 +
1.166 + virtual void SetTransform(const Matrix& aTransform);
1.167 +
1.168 + // Call to set up aContext for drawing (with the current transform, etc).
1.169 + // Pass the path you're going to be using if you have one.
1.170 + // Implicitly calls WillChange(aPath).
1.171 + void PrepareForDrawing(cairo_t* aContext, const Path* aPath = nullptr);
1.172 +
1.173 + static cairo_surface_t *GetDummySurface();
1.174 +
1.175 +private: // methods
1.176 + // Init cairo surface without doing a cairo_surface_reference() call.
1.177 + bool InitAlreadyReferenced(cairo_surface_t* aSurface, const IntSize& aSize, SurfaceFormat* aFormat = nullptr);
1.178 + enum DrawPatternType { DRAW_FILL, DRAW_STROKE };
1.179 + void DrawPattern(const Pattern& aPattern,
1.180 + const StrokeOptions& aStrokeOptions,
1.181 + const DrawOptions& aOptions,
1.182 + DrawPatternType aDrawType,
1.183 + bool aPathBoundsClip = false);
1.184 +
1.185 + void CopySurfaceInternal(cairo_surface_t* aSurface,
1.186 + const IntRect& aSource,
1.187 + const IntPoint& aDest);
1.188 +
1.189 + Rect GetUserSpaceClip();
1.190 +
1.191 + // Call before you make any changes to the backing surface with which this
1.192 + // context is associated. Pass the path you're going to be using if you have
1.193 + // one.
1.194 + void WillChange(const Path* aPath = nullptr);
1.195 +
1.196 + // Call if there is any reason to disassociate the snapshot from this draw
1.197 + // target; for example, because we're going to be destroyed.
1.198 + void MarkSnapshotIndependent();
1.199 +
1.200 + // If the current operator is "source" then clear the destination before we
1.201 + // draw into it, to simulate the effect of an unbounded source operator.
1.202 + void ClearSurfaceForUnboundedSource(const CompositionOp &aOperator);
1.203 +private: // data
1.204 + cairo_t* mContext;
1.205 + cairo_surface_t* mSurface;
1.206 + IntSize mSize;
1.207 +
1.208 + uint8_t* mLockedBits;
1.209 +
1.210 + // The latest snapshot of this surface. This needs to be told when this
1.211 + // target is modified. We keep it alive as a cache.
1.212 + RefPtr<SourceSurfaceCairo> mSnapshot;
1.213 + static cairo_surface_t *mDummySurface;
1.214 +};
1.215 +
1.216 +}
1.217 +}
1.218 +
1.219 +#endif // _MOZILLA_GFX_DRAWTARGET_CAIRO_H_
