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/*
* Copyright 2010 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkGpuDevice_DEFINED
#define SkGpuDevice_DEFINED
#include "SkGr.h"
#include "SkBitmap.h"
#include "SkDevice.h"
#include "SkRegion.h"
#include "GrContext.h"
struct SkDrawProcs;
struct GrSkDrawProcs;
class GrTextContext;
/**
* Subclass of SkDevice, which directs all drawing to the GrGpu owned by the
* canvas.
*/
class SK_API SkGpuDevice : public SkDevice {
public:
/**
* New device that will create an offscreen renderTarget based on the
* config, width, height. The device's storage will not count against
* the GrContext's texture cache budget. The device's pixels will be
* uninitialized.
*/
SkGpuDevice(GrContext*, SkBitmap::Config, int width, int height);
/**
* New device that will render to the specified renderTarget.
*/
SkGpuDevice(GrContext*, GrRenderTarget*);
/**
* New device that will render to the texture (as a rendertarget).
* The GrTexture's asRenderTarget() must be non-NULL or device will not
* function.
*/
SkGpuDevice(GrContext*, GrTexture*);
virtual ~SkGpuDevice();
GrContext* context() const { return fContext; }
/**
* Override from SkGpuDevice, so we can set our FBO to be the render target
* The canvas parameter must be a SkGpuCanvas
*/
virtual void gainFocus(SkCanvas*, const SkMatrix&, const SkRegion&,
const SkClipStack& clipStack) SK_OVERRIDE;
virtual SkGpuRenderTarget* accessRenderTarget() SK_OVERRIDE;
// overrides from SkDevice
virtual void clear(SkColor color) SK_OVERRIDE;
virtual void writePixels(const SkBitmap& bitmap, int x, int y,
SkCanvas::Config8888 config8888) SK_OVERRIDE;
virtual void setMatrixClip(const SkMatrix& matrix, const SkRegion& clip,
const SkClipStack&) SK_OVERRIDE;
virtual void drawPaint(const SkDraw&, const SkPaint& paint) SK_OVERRIDE;
virtual void drawPoints(const SkDraw&, SkCanvas::PointMode mode, size_t count,
const SkPoint[], const SkPaint& paint) SK_OVERRIDE;
virtual void drawRect(const SkDraw&, const SkRect& r,
const SkPaint& paint) SK_OVERRIDE;
virtual void drawPath(const SkDraw&, const SkPath& path,
const SkPaint& paint, const SkMatrix* prePathMatrix,
bool pathIsMutable) SK_OVERRIDE;
virtual void drawBitmap(const SkDraw&, const SkBitmap& bitmap,
const SkIRect* srcRectOrNull,
const SkMatrix&, const SkPaint&) SK_OVERRIDE;
virtual void drawSprite(const SkDraw&, const SkBitmap& bitmap,
int x, int y, const SkPaint& paint);
virtual void drawText(const SkDraw&, const void* text, size_t len,
SkScalar x, SkScalar y, const SkPaint&) SK_OVERRIDE;
virtual void drawPosText(const SkDraw&, const void* text, size_t len,
const SkScalar pos[], SkScalar constY,
int scalarsPerPos, const SkPaint&) SK_OVERRIDE;
virtual void drawTextOnPath(const SkDraw&, const void* text, size_t len,
const SkPath& path, const SkMatrix* matrix,
const SkPaint&) SK_OVERRIDE;
virtual void drawVertices(const SkDraw&, SkCanvas::VertexMode, int vertexCount,
const SkPoint verts[], const SkPoint texs[],
const SkColor colors[], SkXfermode* xmode,
const uint16_t indices[], int indexCount,
const SkPaint&) SK_OVERRIDE;
virtual void drawDevice(const SkDraw&, SkDevice*, int x, int y,
const SkPaint&) SK_OVERRIDE;
virtual bool filterTextFlags(const SkPaint&, TextFlags*) SK_OVERRIDE;
virtual void flush();
/**
* Make's this device's rendertarget current in the underlying 3D API.
* Also implicitly flushes.
*/
virtual void makeRenderTargetCurrent();
virtual bool canHandleImageFilter(SkImageFilter*) SK_OVERRIDE;
virtual bool filterImage(SkImageFilter*, const SkBitmap&, const SkMatrix&,
SkBitmap*, SkIPoint*) SK_OVERRIDE;
class SkAutoCachedTexture; // used internally
protected:
typedef GrContext::TextureCacheEntry TexCache;
TexCache lockCachedTexture(const SkBitmap& bitmap,
const GrSamplerState* sampler);
bool isBitmapInTextureCache(const SkBitmap& bitmap,
const GrSamplerState& sampler) const;
void unlockCachedTexture(TexCache);
// overrides from SkDevice
virtual bool onReadPixels(const SkBitmap& bitmap,
int x, int y,
SkCanvas::Config8888 config8888) SK_OVERRIDE;
private:
GrContext* fContext;
GrSkDrawProcs* fDrawProcs;
// state for our offscreen render-target
TexCache fCache;
GrTexture* fTexture;
GrRenderTarget* fRenderTarget;
bool fNeedClear;
bool fNeedPrepareRenderTarget;
// called from rt and tex cons
void initFromRenderTarget(GrContext*, GrRenderTarget*);
// used by createCompatibleDevice
SkGpuDevice(GrContext*, GrTexture* texture, TexCache, bool needClear);
// override from SkDevice
virtual SkDevice* onCreateCompatibleDevice(SkBitmap::Config config,
int width, int height,
bool isOpaque,
Usage usage) SK_OVERRIDE;
SkDrawProcs* initDrawForText(GrTextContext*);
bool bindDeviceAsTexture(GrPaint* paint);
void prepareRenderTarget(const SkDraw&);
bool shouldTileBitmap(const SkBitmap& bitmap,
const GrSamplerState& sampler,
const SkIRect* srcRectPtr,
int* tileSize) const;
void internalDrawBitmap(const SkDraw&, const SkBitmap&,
const SkIRect&, const SkMatrix&, GrPaint* grPaint);
/**
* Returns non-initialized instance.
*/
GrTextContext* getTextContext();
typedef SkDevice INHERITED;
};
#endif
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