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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 "SkPicture.h"
#include "SkRegion.h"
#include "SkSurface.h"
#include "GrContext.h"
#include "GrSurfacePriv.h"
struct SkDrawProcs;
struct GrSkDrawProcs;
class GrAccelData;
struct GrCachedLayer;
class GrTextContext;
/**
* Subclass of SkBaseDevice, which directs all drawing to the GrGpu owned by the
* canvas.
*/
class SK_API SkGpuDevice : public SkBaseDevice {
public:
enum Flags {
kNeedClear_Flag = 1 << 0, //!< Surface requires an initial clear
};
/**
* Creates an SkGpuDevice from a GrRenderTarget.
*/
static SkGpuDevice* Create(GrRenderTarget* target, const SkSurfaceProps*, unsigned flags = 0);
/**
* New device that will create an offscreen renderTarget based on the ImageInfo and
* sampleCount. The Budgeted param controls whether the device's backing store counts against
* the resource cache budget. On failure, returns NULL.
*/
static SkGpuDevice* Create(GrContext*, SkSurface::Budgeted, const SkImageInfo&,
int sampleCount, const SkSurfaceProps*, unsigned flags = 0);
virtual ~SkGpuDevice();
SkGpuDevice* cloneDevice(const SkSurfaceProps& props) {
SkBaseDevice* dev = this->onCreateDevice(CreateInfo(this->imageInfo(), kPossible_TileUsage,
props.pixelGeometry()),
NULL);
return static_cast<SkGpuDevice*>(dev);
}
GrContext* context() const { return fContext; }
// set all pixels to 0
void clearAll();
void replaceRenderTarget(bool shouldRetainContent);
GrRenderTarget* accessRenderTarget() SK_OVERRIDE;
SkImageInfo imageInfo() const SK_OVERRIDE {
return fRenderTarget ? fRenderTarget->surfacePriv().info() : SkImageInfo::MakeUnknown();
}
const SkSurfaceProps& surfaceProps() const { return fSurfaceProps; }
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 drawDRRect(const SkDraw& draw, const SkRRect& outer,
const SkRRect& inner, 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) SK_OVERRIDE;
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[], int scalarsPerPos,
const SkPoint& offset, const SkPaint&) SK_OVERRIDE;
virtual void drawTextBlob(const SkDraw&, const SkTextBlob*, SkScalar x, SkScalar y,
const SkPaint& paint, SkDrawFilter* drawFilter) 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;
void flush() SK_OVERRIDE;
void onAttachToCanvas(SkCanvas* canvas) SK_OVERRIDE;
void onDetachFromCanvas() SK_OVERRIDE;
const SkBitmap& onAccessBitmap() SK_OVERRIDE;
bool canHandleImageFilter(const SkImageFilter*) SK_OVERRIDE;
virtual bool filterImage(const SkImageFilter*, const SkBitmap&,
const SkImageFilter::Context&,
SkBitmap*, SkIPoint*) SK_OVERRIDE;
bool filterTexture(GrContext*, GrTexture*, const SkImageFilter*,
const SkImageFilter::Context&,
SkBitmap* result, SkIPoint* offset);
protected:
bool onReadPixels(const SkImageInfo&, void*, size_t, int, int) SK_OVERRIDE;
bool onWritePixels(const SkImageInfo&, const void*, size_t, int, int) SK_OVERRIDE;
bool onShouldDisableLCD(const SkPaint&) const SK_OVERRIDE;
/** PRIVATE / EXPERIMENTAL -- do not call */
virtual bool EXPERIMENTAL_drawPicture(SkCanvas* canvas, const SkPicture* picture,
const SkMatrix*, const SkPaint*) SK_OVERRIDE;
private:
GrContext* fContext;
GrSkDrawProcs* fDrawProcs;
SkAutoTUnref<const SkClipStack> fClipStack;
SkIPoint fClipOrigin;
GrClip fClip;
GrTextContext* fTextContext;
SkSurfaceProps fSurfaceProps;
GrRenderTarget* fRenderTarget;
// remove when our clients don't rely on accessBitmap()
SkBitmap fLegacyBitmap;
bool fNeedClear;
SkGpuDevice(GrRenderTarget*, const SkSurfaceProps*, unsigned flags);
SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) SK_OVERRIDE;
SkSurface* newSurface(const SkImageInfo&, const SkSurfaceProps&) SK_OVERRIDE;
SkImageFilter::Cache* getImageFilterCache() SK_OVERRIDE;
bool forceConservativeRasterClip() const SK_OVERRIDE { return true; }
// sets the render target and clip on context
void prepareDraw(const SkDraw&);
/**
* Implementation for both drawBitmap and drawBitmapRect.
*/
void drawBitmapCommon(const SkDraw&,
const SkBitmap& bitmap,
const SkRect* srcRectPtr,
const SkSize* dstSizePtr, // ignored iff srcRectPtr == NULL
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 SkMatrix& viewMatrix,
const GrTextureParams& sampler,
const SkRect* srcRectPtr,
int maxTileSize,
int* tileSize,
SkIRect* clippedSrcRect) const;
void internalDrawBitmap(const SkBitmap&,
const SkMatrix& viewMatrix,
const SkRect&,
const GrTextureParams& params,
const SkPaint& paint,
SkCanvas::DrawBitmapRectFlags flags,
bool bicubic,
bool needsTextureDomain);
void drawTiledBitmap(const SkBitmap& bitmap,
const SkMatrix& viewMatrix,
const SkRect& srcRect,
const SkIRect& clippedSrcRect,
const GrTextureParams& params,
const SkPaint& paint,
SkCanvas::DrawBitmapRectFlags flags,
int tileSize,
bool bicubic);
void internalDrawPath(const SkPath& origSrcPath, const SkPaint& paint,
const SkMatrix& origViewMatrix, const SkMatrix* prePathMatrix,
const SkIRect& clipBounds, bool pathIsMutable);
bool drawDashLine(const SkPoint pts[2], const SkPaint& paint);
static SkPicture::AccelData::Key ComputeAccelDataKey();
static GrRenderTarget* CreateRenderTarget(GrContext*, SkSurface::Budgeted, const SkImageInfo&,
int sampleCount);
friend class GrTextContext;
typedef SkBaseDevice INHERITED;
};
#endif
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