michael@0: 
michael@0: /*
michael@0:  * Copyright 2010 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: 
michael@0: 
michael@0: #ifndef SkGpuDevice_DEFINED
michael@0: #define SkGpuDevice_DEFINED
michael@0: 
michael@0: #include "SkGr.h"
michael@0: #include "SkBitmap.h"
michael@0: #include "SkBitmapDevice.h"
michael@0: #include "SkPicture.h"
michael@0: #include "SkRegion.h"
michael@0: #include "GrContext.h"
michael@0: 
michael@0: struct SkDrawProcs;
michael@0: struct GrSkDrawProcs;
michael@0: 
michael@0: class GrTextContext;
michael@0: 
michael@0: /**
michael@0:  *  Subclass of SkBitmapDevice, which directs all drawing to the GrGpu owned by the
michael@0:  *  canvas.
michael@0:  */
michael@0: class SK_API SkGpuDevice : public SkBitmapDevice {
michael@0: public:
michael@0: 
michael@0:     /**
michael@0:      * Creates an SkGpuDevice from a GrSurface. This will fail if the surface is not a render
michael@0:      * target. The caller owns a ref on the returned device.
michael@0:      */
michael@0:     static SkGpuDevice* Create(GrSurface* surface);
michael@0: 
michael@0:     /**
michael@0:      *  New device that will create an offscreen renderTarget based on the
michael@0:      *  ImageInfo and sampleCount. The device's storage will not
michael@0:      *  count against the GrContext's texture cache budget. The device's pixels
michael@0:      *  will be uninitialized. On failure, returns NULL.
michael@0:      */
michael@0:     static SkGpuDevice* Create(GrContext*, const SkImageInfo&, int sampleCount);
michael@0: 
michael@0: #ifdef SK_SUPPORT_LEGACY_COMPATIBLEDEVICE_CONFIG
michael@0:     /**
michael@0:      *  New device that will create an offscreen renderTarget based on the
michael@0:      *  config, width, height, and sampleCount. The device's storage will not
michael@0:      *  count against the GrContext's texture cache budget. The device's pixels
michael@0:      *  will be uninitialized. TODO: This can fail, replace with a factory function.
michael@0:      */
michael@0:     SkGpuDevice(GrContext*, SkBitmap::Config, int width, int height, int sampleCount = 0);
michael@0: #endif
michael@0: 
michael@0:     /**
michael@0:      *  DEPRECATED -- need to make this private, call Create(surface)
michael@0:      *  New device that will render to the specified renderTarget.
michael@0:      */
michael@0:     SkGpuDevice(GrContext*, GrRenderTarget*);
michael@0: 
michael@0:     /**
michael@0:      *  DEPRECATED -- need to make this private, call Create(surface)
michael@0:      *  New device that will render to the texture (as a rendertarget).
michael@0:      *  The GrTexture's asRenderTarget() must be non-NULL or device will not
michael@0:      *  function.
michael@0:      */
michael@0:     SkGpuDevice(GrContext*, GrTexture*);
michael@0: 
michael@0:     virtual ~SkGpuDevice();
michael@0: 
michael@0:     GrContext* context() const { return fContext; }
michael@0: 
michael@0:     virtual GrRenderTarget* accessRenderTarget() SK_OVERRIDE;
michael@0: 
michael@0:     // overrides from SkBaseDevice
michael@0:     virtual int width() const SK_OVERRIDE {
michael@0:         return NULL == fRenderTarget ? 0 : fRenderTarget->width();
michael@0:     }
michael@0:     virtual int height() const SK_OVERRIDE {
michael@0:         return NULL == fRenderTarget ? 0 : fRenderTarget->height();
michael@0:     }
michael@0:     virtual bool isOpaque() const SK_OVERRIDE {
michael@0:         return NULL == fRenderTarget ? false
michael@0:                                      : kRGB_565_GrPixelConfig == fRenderTarget->config();
michael@0:     }
michael@0:     virtual SkBitmap::Config config() const SK_OVERRIDE;
michael@0: 
michael@0:     virtual void clear(SkColor color) SK_OVERRIDE;
michael@0: #ifdef SK_SUPPORT_LEGACY_WRITEPIXELSCONFIG
michael@0:     virtual void writePixels(const SkBitmap& bitmap, int x, int y,
michael@0:                              SkCanvas::Config8888 config8888) SK_OVERRIDE;
michael@0: #endif
michael@0:     virtual void drawPaint(const SkDraw&, const SkPaint& paint) SK_OVERRIDE;
michael@0:     virtual void drawPoints(const SkDraw&, SkCanvas::PointMode mode, size_t count,
michael@0:                             const SkPoint[], const SkPaint& paint) SK_OVERRIDE;
michael@0:     virtual void drawRect(const SkDraw&, const SkRect& r,
michael@0:                           const SkPaint& paint) SK_OVERRIDE;
michael@0:     virtual void drawRRect(const SkDraw&, const SkRRect& r,
michael@0:                            const SkPaint& paint) SK_OVERRIDE;
michael@0:     virtual void drawOval(const SkDraw&, const SkRect& oval,
michael@0:                           const SkPaint& paint) SK_OVERRIDE;
michael@0:     virtual void drawPath(const SkDraw&, const SkPath& path,
michael@0:                           const SkPaint& paint, const SkMatrix* prePathMatrix,
michael@0:                           bool pathIsMutable) SK_OVERRIDE;
michael@0:     virtual void drawBitmap(const SkDraw&, const SkBitmap& bitmap,
michael@0:                             const SkMatrix&, const SkPaint&) SK_OVERRIDE;
michael@0:     virtual void drawBitmapRect(const SkDraw&, const SkBitmap&,
michael@0:                                 const SkRect* srcOrNull, const SkRect& dst,
michael@0:                                 const SkPaint& paint,
michael@0:                                 SkCanvas::DrawBitmapRectFlags flags) SK_OVERRIDE;
michael@0:     virtual void drawSprite(const SkDraw&, const SkBitmap& bitmap,
michael@0:                             int x, int y, const SkPaint& paint);
michael@0:     virtual void drawText(const SkDraw&, const void* text, size_t len,
michael@0:                           SkScalar x, SkScalar y, const SkPaint&) SK_OVERRIDE;
michael@0:     virtual void drawPosText(const SkDraw&, const void* text, size_t len,
michael@0:                              const SkScalar pos[], SkScalar constY,
michael@0:                              int scalarsPerPos, const SkPaint&) SK_OVERRIDE;
michael@0:     virtual void drawTextOnPath(const SkDraw&, const void* text, size_t len,
michael@0:                                 const SkPath& path, const SkMatrix* matrix,
michael@0:                                 const SkPaint&) SK_OVERRIDE;
michael@0:     virtual void drawVertices(const SkDraw&, SkCanvas::VertexMode, int vertexCount,
michael@0:                               const SkPoint verts[], const SkPoint texs[],
michael@0:                               const SkColor colors[], SkXfermode* xmode,
michael@0:                               const uint16_t indices[], int indexCount,
michael@0:                               const SkPaint&) SK_OVERRIDE;
michael@0:     virtual void drawDevice(const SkDraw&, SkBaseDevice*, int x, int y,
michael@0:                             const SkPaint&) SK_OVERRIDE;
michael@0:     virtual bool filterTextFlags(const SkPaint&, TextFlags*) SK_OVERRIDE;
michael@0: 
michael@0:     virtual void flush() SK_OVERRIDE;
michael@0: 
michael@0:     virtual void onAttachToCanvas(SkCanvas* canvas) SK_OVERRIDE;
michael@0:     virtual void onDetachFromCanvas() SK_OVERRIDE;
michael@0: 
michael@0:     /**
michael@0:      * Make's this device's rendertarget current in the underlying 3D API.
michael@0:      * Also implicitly flushes.
michael@0:      */
michael@0:     virtual void makeRenderTargetCurrent();
michael@0: 
michael@0:     virtual bool canHandleImageFilter(const SkImageFilter*) SK_OVERRIDE;
michael@0:     virtual bool filterImage(const SkImageFilter*, const SkBitmap&,
michael@0:                              const SkImageFilter::Context&,
michael@0:                              SkBitmap*, SkIPoint*) SK_OVERRIDE;
michael@0: 
michael@0:     class SkAutoCachedTexture; // used internally
michael@0: 
michael@0: 
michael@0: protected:
michael@0:     virtual bool onReadPixels(const SkBitmap&, int x, int y, SkCanvas::Config8888) SK_OVERRIDE;
michael@0:     virtual bool onWritePixels(const SkImageInfo&, const void*, size_t, int, int) SK_OVERRIDE;
michael@0: 
michael@0:     /**  PRIVATE / EXPERIMENTAL -- do not call */
michael@0:     virtual void EXPERIMENTAL_optimize(SkPicture* picture) SK_OVERRIDE;
michael@0:     /**  PRIVATE / EXPERIMENTAL -- do not call */
michael@0:     virtual bool EXPERIMENTAL_drawPicture(const SkPicture& picture) SK_OVERRIDE;
michael@0: 
michael@0: private:
michael@0:     GrContext*      fContext;
michael@0: 
michael@0:     GrSkDrawProcs*  fDrawProcs;
michael@0: 
michael@0:     GrClipData      fClipData;
michael@0: 
michael@0:     GrTextContext*  fMainTextContext;
michael@0:     GrTextContext*  fFallbackTextContext;
michael@0: 
michael@0:     // state for our render-target
michael@0:     GrRenderTarget*     fRenderTarget;
michael@0:     bool                fNeedClear;
michael@0: 
michael@0:     // called from rt and tex cons
michael@0:     void initFromRenderTarget(GrContext*, GrRenderTarget*, bool cached);
michael@0: 
michael@0:     // used by createCompatibleDevice
michael@0:     SkGpuDevice(GrContext*, GrTexture* texture, bool needClear);
michael@0: 
michael@0:     virtual SkBaseDevice* onCreateDevice(const SkImageInfo&, Usage) SK_OVERRIDE;
michael@0: 
michael@0:     virtual SkSurface* newSurface(const SkImageInfo&) SK_OVERRIDE;
michael@0: 
michael@0:     // sets the render target, clip, and matrix on GrContext. Use forceIdenity to override
michael@0:     // SkDraw's matrix and draw in device coords.
michael@0:     void prepareDraw(const SkDraw&, bool forceIdentity);
michael@0: 
michael@0:     /**
michael@0:      * Implementation for both drawBitmap and drawBitmapRect.
michael@0:      */
michael@0:     void drawBitmapCommon(const SkDraw&,
michael@0:                           const SkBitmap& bitmap,
michael@0:                           const SkRect* srcRectPtr,
michael@0:                           const SkSize* dstSizePtr,      // ignored iff srcRectPtr == NULL
michael@0:                           const SkPaint&,
michael@0:                           SkCanvas::DrawBitmapRectFlags flags);
michael@0: 
michael@0:     /**
michael@0:      * Helper functions called by drawBitmapCommon. By the time these are called the SkDraw's
michael@0:      * matrix, clip, and the device's render target has already been set on GrContext.
michael@0:      */
michael@0: 
michael@0:     // The tileSize and clippedSrcRect will be valid only if true is returned.
michael@0:     bool shouldTileBitmap(const SkBitmap& bitmap,
michael@0:                           const GrTextureParams& sampler,
michael@0:                           const SkRect* srcRectPtr,
michael@0:                           int maxTileSize,
michael@0:                           int* tileSize,
michael@0:                           SkIRect* clippedSrcRect) const;
michael@0:     void internalDrawBitmap(const SkBitmap&,
michael@0:                             const SkRect&,
michael@0:                             const GrTextureParams& params,
michael@0:                             const SkPaint& paint,
michael@0:                             SkCanvas::DrawBitmapRectFlags flags,
michael@0:                             bool bicubic);
michael@0:     void drawTiledBitmap(const SkBitmap& bitmap,
michael@0:                          const SkRect& srcRect,
michael@0:                          const SkIRect& clippedSrcRect,
michael@0:                          const GrTextureParams& params,
michael@0:                          const SkPaint& paint,
michael@0:                          SkCanvas::DrawBitmapRectFlags flags,
michael@0:                          int tileSize,
michael@0:                          bool bicubic);
michael@0: 
michael@0:     static SkPicture::AccelData::Key ComputeAccelDataKey();
michael@0: 
michael@0:     typedef SkBitmapDevice INHERITED;
michael@0: };
michael@0: 
michael@0: #endif