gecko-dev/gfx/2d/DrawTargetCairo.h
Joe Drew 9371772113 Bug 707848 - Implement paths in the 2D API's Cairo backend. r=jrmuizel
--HG--
extra : rebase_source : a127cd96d48077c02f32d64b89984995c02fc38b
2012-01-09 17:15:10 -05:00

198 lines
7.5 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Corporation code.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#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)
{
for (uint32_t i = 0; i < aNumStops; ++i) {
mStops.push_back(aStops[i]);
}
}
virtual ~GradientStopsCairo() {}
const std::vector<GradientStop>& GetStops() const
{
return mStops;
}
virtual BackendType GetBackendType() const { return BACKEND_CAIRO; }
private:
std::vector<GradientStop> mStops;
};
class DrawTargetCairo : public DrawTarget
{
public:
DrawTargetCairo();
virtual ~DrawTargetCairo();
virtual BackendType GetType() const { return BACKEND_CAIRO; }
virtual TemporaryRef<SourceSurface> Snapshot();
virtual IntSize GetSize();
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);
virtual void Mask(const Pattern &aSource,
const Pattern &aMask,
const DrawOptions &aOptions = DrawOptions());
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<GradientStops>
CreateGradientStops(GradientStop *aStops,
uint32_t aNumStops,
ExtendMode aExtendMode = EXTEND_CLAMP) const;
virtual void *GetNativeSurface(NativeSurfaceType aType);
bool Init(cairo_surface_t* aSurface);
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 = NULL);
private: // methods
enum DrawPatternType { DRAW_FILL, DRAW_STROKE };
void DrawPattern(const Pattern& aPattern,
const StrokeOptions& aStrokeOptions,
const DrawOptions& aOptions,
DrawPatternType aDrawType);
// Copy-on-write support for snapshot surfaces.
friend class SourceSurfaceCairo;
void AppendSnapshot(SourceSurfaceCairo* aSnapshot);
void RemoveSnapshot(SourceSurfaceCairo* aSnapshot);
// 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 = NULL);
// Call if there is any reason to disassociate all snapshots from this draw
// target; for example, because we're going to be destroyed.
void MarkSnapshotsIndependent();
private: // data
cairo_t* mContext;
std::vector<SourceSurfaceCairo*> mSnapshots;
mutable RefPtr<CairoPathContext> mPathObserver;
};
}
}
#endif // _MOZILLA_GFX_DRAWTARGET_CAIRO_H_