/*
* 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 "SkBitmapDevice.h"
#include "SkRegion.h"
#include "GrContext.h"
struct SkDrawProcs;
struct GrSkDrawProcs;
class GrTextContext;
/**
* Subclass of SkBitmapDevice, which directs all drawing to the GrGpu owned by the
* canvas.
*/
class SK_API SkGpuDevice : public SkBitmapDevice {
public:
/**
* Creates an SkGpuDevice from a GrSurface. This will fail if the surface is not a render
* target. The caller owns a ref on the returned device.
*/
static SkGpuDevice* Create(GrSurface* surface);
/**
* New device that will create an offscreen renderTarget based on the
* config, width, height, and sampleCount. The device's storage will not
* count against the GrContext's texture cache budget. The device's pixels
* will be uninitialized. TODO: This can fail, replace with a factory function.
*/
SkGpuDevice(GrContext*, SkBitmap::Config, int width, int height, int sampleCount = 0);
/**
* DEPRECATED -- need to make this private, call Create(surface)
* New device that will render to the specified renderTarget.
*/
SkGpuDevice(GrContext*, GrRenderTarget*);
/**
* DEPRECATED -- need to make this private, call Create(surface)
* 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; }
virtual GrRenderTarget* accessRenderTarget() SK_OVERRIDE;
// overrides from SkBaseDevice
virtual uint32_t getDeviceCapabilities() SK_OVERRIDE {
return 0;
}
virtual int width() const SK_OVERRIDE {
return NULL == fRenderTarget ? 0 : fRenderTarget->width();
}
virtual int height() const SK_OVERRIDE {
return NULL == fRenderTarget ? 0 : fRenderTarget->height();
}
virtual bool isOpaque() const SK_OVERRIDE {
return NULL == fRenderTarget ? false
: kRGB_565_GrPixelConfig == fRenderTarget->config();
}
virtual SkBitmap::Config config() const SK_OVERRIDE;
virtual void clear(SkColor color) SK_OVERRIDE;
virtual void writePixels(const SkBitmap& bitmap, int x, int y,
SkCanvas::Config8888 config8888) 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 drawRRect(const SkDraw&, const SkRRect& r,
const SkPaint& paint) SK_OVERRIDE;
virtual void drawOval(const SkDraw&, const SkRect& oval,
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 SkMatrix&, const SkPaint&) SK_OVERRIDE;
virtual void drawBitmapRect(const SkDraw&, const SkBitmap&,
const SkRect* srcOrNull, const SkRect& dst,
const SkPaint& paint,
SkCanvas::DrawBitmapRectFlags flags) 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&, SkBaseDevice*, int x, int y,
const SkPaint&) SK_OVERRIDE;
virtual bool filterTextFlags(const SkPaint&, TextFlags*) SK_OVERRIDE;
virtual void flush() SK_OVERRIDE;
virtual void onAttachToCanvas(SkCanvas* canvas) SK_OVERRIDE;
virtual void onDetachFromCanvas() SK_OVERRIDE;
/**
* 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:
// overrides from SkBaseDevice
virtual bool onReadPixels(const SkBitmap& bitmap,
int x, int y,
SkCanvas::Config8888 config8888) SK_OVERRIDE;
private:
GrContext* fContext;
GrSkDrawProcs* fDrawProcs;
GrClipData fClipData;
// state for our render-target
GrRenderTarget* fRenderTarget;
bool fNeedClear;
// called from rt and tex cons
void initFromRenderTarget(GrContext*, GrRenderTarget*, bool cached);
// used by createCompatibleDevice
SkGpuDevice(GrContext*, GrTexture* texture, bool needClear);
// override from SkBaseDevice
virtual SkBaseDevice* onCreateCompatibleDevice(SkBitmap::Config config,
int width, int height,
bool isOpaque,
Usage usage) SK_OVERRIDE;
SkDrawProcs* initDrawForText(GrTextContext*);
// sets the render target, clip, and matrix on GrContext. Use forceIdenity to override
// SkDraw's matrix and draw in device coords.
void prepareDraw(const SkDraw&, bool forceIdentity);
/**
* Implementation for both drawBitmap and drawBitmapRect.
*/
void drawBitmapCommon(const SkDraw&,
const SkBitmap& bitmap,
const SkRect* srcRectPtr,
const SkMatrix&,
const SkPaint&,
SkCanvas::DrawBitmapRectFlags flags);
/**
* Helper functions called by drawBitmapCommon. By the time these are called the SkDraw's
* matrix, clip, and the device's render target has already been set on GrContext.
*/
// The tileSize and clippedSrcRect will be valid only if true is returned.
bool shouldTileBitmap(const SkBitmap& bitmap,
const GrTextureParams& sampler,
const SkRect* srcRectPtr,
int maxTileSize,
int* tileSize,
SkIRect* clippedSrcRect) const;
void internalDrawBitmap(const SkBitmap&,
const SkRect&,
const GrTextureParams& params,
const SkPaint& paint,
SkCanvas::DrawBitmapRectFlags flags,
bool bicubic);
void drawTiledBitmap(const SkBitmap& bitmap,
const SkRect& srcRect,
const SkIRect& clippedSrcRect,
const GrTextureParams& params,
const SkPaint& paint,
SkCanvas::DrawBitmapRectFlags flags,
int tileSize,
bool bicubic);
/**
* Returns non-initialized instance.
*/
GrTextContext* getTextContext();
typedef SkBitmapDevice INHERITED;
};
#endif