gecko-dev/gfx/2d/DrawTargetCG.h
2016-06-28 20:28:23 +02:00

227 lines
7.9 KiB
Objective-C

/* -*- 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_DrawTargetCG_h
#define mozilla_gfx_DrawTargetCG_h
#ifdef MOZ_WIDGET_COCOA
#include <ApplicationServices/ApplicationServices.h>
#import <OpenGL/OpenGL.h>
#else
#include <CoreGraphics/CoreGraphics.h>
#include <OpenGLES/ES2/gl.h>
#include <OpenGLES/ES2/glext.h>
#endif
#include "2D.h"
#include "Rect.h"
#include "PathCG.h"
#include "SourceSurfaceCG.h"
#include "GLDefs.h"
#include "Tools.h"
namespace mozilla {
namespace gfx {
static inline CGAffineTransform
GfxMatrixToCGAffineTransform(const Matrix &m)
{
CGAffineTransform t;
t.a = m._11;
t.b = m._12;
t.c = m._21;
t.d = m._22;
t.tx = m._31;
t.ty = m._32;
return t;
}
static inline Rect
CGRectToRect(CGRect rect)
{
return Rect(rect.origin.x,
rect.origin.y,
rect.size.width,
rect.size.height);
}
static inline Point
CGPointToPoint(CGPoint point)
{
return Point(point.x, point.y);
}
static inline void
SetStrokeOptions(CGContextRef cg, const StrokeOptions &aStrokeOptions)
{
switch (aStrokeOptions.mLineCap)
{
case CapStyle::BUTT:
CGContextSetLineCap(cg, kCGLineCapButt);
break;
case CapStyle::ROUND:
CGContextSetLineCap(cg, kCGLineCapRound);
break;
case CapStyle::SQUARE:
CGContextSetLineCap(cg, kCGLineCapSquare);
break;
}
switch (aStrokeOptions.mLineJoin)
{
case JoinStyle::BEVEL:
CGContextSetLineJoin(cg, kCGLineJoinBevel);
break;
case JoinStyle::ROUND:
CGContextSetLineJoin(cg, kCGLineJoinRound);
break;
case JoinStyle::MITER:
case JoinStyle::MITER_OR_BEVEL:
CGContextSetLineJoin(cg, kCGLineJoinMiter);
break;
}
CGContextSetLineWidth(cg, aStrokeOptions.mLineWidth);
CGContextSetMiterLimit(cg, aStrokeOptions.mMiterLimit);
// XXX: rename mDashLength to dashLength
if (aStrokeOptions.mDashLength > 0) {
// we use a regular array instead of a std::vector here because we don't want to leak the <vector> include
CGFloat *dashes = new CGFloat[aStrokeOptions.mDashLength];
for (size_t i=0; i<aStrokeOptions.mDashLength; i++) {
dashes[i] = aStrokeOptions.mDashPattern[i];
}
CGContextSetLineDash(cg, aStrokeOptions.mDashOffset, dashes, aStrokeOptions.mDashLength);
delete[] dashes;
}
}
class GlyphRenderingOptionsCG : public GlyphRenderingOptions
{
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(GlyphRenderingOptionsCG, override)
explicit GlyphRenderingOptionsCG(const Color &aFontSmoothingBackgroundColor)
: mFontSmoothingBackgroundColor(aFontSmoothingBackgroundColor)
{}
const Color &FontSmoothingBackgroundColor() const { return mFontSmoothingBackgroundColor; }
virtual FontType GetType() const override { return FontType::MAC; }
private:
Color mFontSmoothingBackgroundColor;
};
class DrawTargetCG : public DrawTarget
{
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawTargetCG, override)
friend class BorrowedCGContext;
friend class UnboundnessFixer;
friend class SourceSurfaceCGBitmapContext;
DrawTargetCG();
virtual ~DrawTargetCG();
virtual DrawTargetType GetType() const override;
virtual BackendType GetBackendType() const override;
virtual already_AddRefed<SourceSurface> Snapshot() 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 MaskSurface(const Pattern &aSource,
SourceSurface *aMask,
Point aOffset,
const DrawOptions &aOptions = DrawOptions()) override;
virtual void FillRect(const Rect &aRect,
const Pattern &aPattern,
const DrawOptions &aOptions = DrawOptions()) override;
//XXX: why do we take a reference to SurfaceFormat?
bool Init(BackendType aType, const IntSize &aSize, SurfaceFormat&);
bool Init(BackendType aType, unsigned char* aData, const IntSize &aSize, int32_t aStride, SurfaceFormat aFormat);
bool Init(CGContextRef cgContext, const IntSize &aSize);
// Flush if using IOSurface context
virtual void Flush() override;
virtual void DrawSurfaceWithShadow(SourceSurface *, const Point &, const Color &, const Point &, Float, CompositionOp) override;
virtual void ClearRect(const Rect &) override;
virtual void CopySurface(SourceSurface *, const IntRect&, const IntPoint&) override;
virtual void StrokeRect(const Rect &, const Pattern &, const StrokeOptions&, const DrawOptions&) override;
virtual void StrokeLine(const Point &, const Point &, const Pattern &, const StrokeOptions &, const DrawOptions &) override;
virtual void Stroke(const Path *, const Pattern &, const StrokeOptions &, const DrawOptions &) override;
virtual void Fill(const Path *, const Pattern &, const DrawOptions &) override;
virtual void FillGlyphs(ScaledFont *, const GlyphBuffer&, const Pattern &, const DrawOptions &, const GlyphRenderingOptions *) override;
virtual void Mask(const Pattern &aSource,
const Pattern &aMask,
const DrawOptions &aOptions = DrawOptions()) override;
virtual void PushClip(const Path *) override;
virtual void PushClipRect(const Rect &aRect) override;
virtual void PopClip() override;
virtual already_AddRefed<SourceSurface> CreateSourceSurfaceFromNativeSurface(const NativeSurface&) const override { return nullptr;}
virtual already_AddRefed<DrawTarget> CreateSimilarDrawTarget(const IntSize &, SurfaceFormat) const override;
virtual already_AddRefed<PathBuilder> CreatePathBuilder(FillRule) const override;
virtual already_AddRefed<GradientStops> CreateGradientStops(GradientStop *, uint32_t,
ExtendMode aExtendMode = ExtendMode::CLAMP) const override;
virtual already_AddRefed<FilterNode> CreateFilter(FilterType aType) override;
virtual void *GetNativeSurface(NativeSurfaceType) override;
virtual IntSize GetSize() override { return mSize; }
virtual void SetTransform(const Matrix &aTransform) override;
/* This is for creating good compatible surfaces */
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;
CGContextRef GetCGContext() {
return mCg;
}
// 32767 is the maximum size supported by cairo. We clamp to that to make it
// easier to interoperate.
static size_t GetMaxSurfaceSize() {
return 32767;
}
private:
void MarkChanged();
IntSize mSize;
CGColorSpaceRef mColorSpace;
CGContextRef mCg;
CGAffineTransform mOriginalTransform;
/**
* The image buffer, if the buffer is owned by this class.
* If the DrawTarget was created for a pre-existing buffer or if the buffer's
* lifetime is managed by CoreGraphics, mData will be null.
* Data owned by DrawTargetCG will be deallocated in the destructor.
*/
AlignedArray<uint8_t> mData;
RefPtr<SourceSurfaceCGContext> mSnapshot;
bool mMayContainInvalidPremultipliedData;
};
} // namespace gfx
} // namespace mozilla
#endif