1 2 /* 3 * Copyright 2010 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 #ifndef SkGpuDevice_DEFINED 10 #define SkGpuDevice_DEFINED 11 12 #include "SkGr.h" 13 #include "SkBitmap.h" 14 #include "SkDevice.h" 15 #include "SkPicture.h" 16 #include "SkRegion.h" 17 #include "SkSurface.h" 18 #include "GrContext.h" 19 #include "GrSurfacePriv.h" 20 21 struct SkDrawProcs; 22 struct GrSkDrawProcs; 23 24 class GrAccelData; 25 struct GrCachedLayer; 26 class GrTextContext; 27 28 /** 29 * Subclass of SkBaseDevice, which directs all drawing to the GrGpu owned by the 30 * canvas. 31 */ 32 class SK_API SkGpuDevice : public SkBaseDevice { 33 public: 34 enum Flags { 35 kNeedClear_Flag = 1 << 0, //!< Surface requires an initial clear 36 }; 37 38 /** 39 * Creates an SkGpuDevice from a GrRenderTarget. 40 */ 41 static SkGpuDevice* Create(GrRenderTarget* target, const SkSurfaceProps*, unsigned flags = 0); 42 43 /** 44 * Creates an SkGpuDevice from a GrRenderTarget whose texture width/height is 45 * different than its actual width/height (e.g., approx-match scratch texture). 46 */ 47 static SkGpuDevice* Create(GrRenderTarget* target, int width, int height, 48 const SkSurfaceProps*, unsigned flags = 0); 49 50 /** 51 * New device that will create an offscreen renderTarget based on the ImageInfo and 52 * sampleCount. The Budgeted param controls whether the device's backing store counts against 53 * the resource cache budget. On failure, returns NULL. 54 */ 55 static SkGpuDevice* Create(GrContext*, SkSurface::Budgeted, const SkImageInfo&, 56 int sampleCount, const SkSurfaceProps*, unsigned flags = 0); 57 58 virtual ~SkGpuDevice(); 59 60 SkGpuDevice* cloneDevice(const SkSurfaceProps& props) { 61 SkBaseDevice* dev = this->onCreateDevice(CreateInfo(this->imageInfo(), kPossible_TileUsage, 62 props.pixelGeometry()), 63 NULL); 64 return static_cast<SkGpuDevice*>(dev); 65 } 66 67 GrContext* context() const { return fContext; } 68 69 // set all pixels to 0 70 void clearAll(); 71 72 void replaceRenderTarget(bool shouldRetainContent); 73 74 GrRenderTarget* accessRenderTarget() override; 75 76 SkImageInfo imageInfo() const override { 77 return fLegacyBitmap.info(); 78 } 79 80 const SkSurfaceProps& surfaceProps() const { return fSurfaceProps; } 81 82 void drawPaint(const SkDraw&, const SkPaint& paint) override; 83 virtual void drawPoints(const SkDraw&, SkCanvas::PointMode mode, size_t count, 84 const SkPoint[], const SkPaint& paint) override; 85 virtual void drawRect(const SkDraw&, const SkRect& r, 86 const SkPaint& paint) override; 87 virtual void drawRRect(const SkDraw&, const SkRRect& r, 88 const SkPaint& paint) override; 89 virtual void drawDRRect(const SkDraw& draw, const SkRRect& outer, 90 const SkRRect& inner, const SkPaint& paint) override; 91 virtual void drawOval(const SkDraw&, const SkRect& oval, 92 const SkPaint& paint) override; 93 virtual void drawPath(const SkDraw&, const SkPath& path, 94 const SkPaint& paint, const SkMatrix* prePathMatrix, 95 bool pathIsMutable) override; 96 virtual void drawBitmap(const SkDraw&, const SkBitmap& bitmap, 97 const SkMatrix&, const SkPaint&) override; 98 virtual void drawBitmapRect(const SkDraw&, const SkBitmap&, 99 const SkRect* srcOrNull, const SkRect& dst, 100 const SkPaint& paint, 101 SkCanvas::DrawBitmapRectFlags flags) override; 102 virtual void drawSprite(const SkDraw&, const SkBitmap& bitmap, 103 int x, int y, const SkPaint& paint) override; 104 virtual void drawText(const SkDraw&, const void* text, size_t len, 105 SkScalar x, SkScalar y, const SkPaint&) override; 106 virtual void drawPosText(const SkDraw&, const void* text, size_t len, 107 const SkScalar pos[], int scalarsPerPos, 108 const SkPoint& offset, const SkPaint&) override; 109 virtual void drawTextBlob(const SkDraw&, const SkTextBlob*, SkScalar x, SkScalar y, 110 const SkPaint& paint, SkDrawFilter* drawFilter) override; 111 virtual void drawVertices(const SkDraw&, SkCanvas::VertexMode, int vertexCount, 112 const SkPoint verts[], const SkPoint texs[], 113 const SkColor colors[], SkXfermode* xmode, 114 const uint16_t indices[], int indexCount, 115 const SkPaint&) override; 116 virtual void drawDevice(const SkDraw&, SkBaseDevice*, int x, int y, 117 const SkPaint&) override; 118 void drawImage(const SkDraw&, const SkImage*, SkScalar x, SkScalar y, const SkPaint&) override; 119 void drawImageRect(const SkDraw&, const SkImage*, const SkRect* src, const SkRect& dst, 120 const SkPaint&) override; 121 122 void flush() override; 123 124 void onAttachToCanvas(SkCanvas* canvas) override; 125 void onDetachFromCanvas() override; 126 127 const SkBitmap& onAccessBitmap() override; 128 129 bool canHandleImageFilter(const SkImageFilter*) override; 130 virtual bool filterImage(const SkImageFilter*, const SkBitmap&, 131 const SkImageFilter::Context&, 132 SkBitmap*, SkIPoint*) override; 133 134 bool filterTexture(GrContext*, GrTexture*, int width, int height, const SkImageFilter*, 135 const SkImageFilter::Context&, 136 SkBitmap* result, SkIPoint* offset); 137 138 protected: 139 bool onReadPixels(const SkImageInfo&, void*, size_t, int, int) override; 140 bool onWritePixels(const SkImageInfo&, const void*, size_t, int, int) override; 141 bool onShouldDisableLCD(const SkPaint&) const override; 142 143 /** PRIVATE / EXPERIMENTAL -- do not call */ 144 virtual bool EXPERIMENTAL_drawPicture(SkCanvas* canvas, const SkPicture* picture, 145 const SkMatrix*, const SkPaint*) override; 146 147 private: 148 GrContext* fContext; 149 GrSkDrawProcs* fDrawProcs; 150 SkAutoTUnref<const SkClipStack> fClipStack; 151 SkIPoint fClipOrigin; 152 GrClip fClip; 153 GrTextContext* fTextContext; 154 SkSurfaceProps fSurfaceProps; 155 GrRenderTarget* fRenderTarget; 156 // remove when our clients don't rely on accessBitmap() 157 SkBitmap fLegacyBitmap; 158 bool fNeedClear; 159 160 SkGpuDevice(GrRenderTarget*, int width, int height, const SkSurfaceProps*, unsigned flags); 161 162 SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) override; 163 164 SkSurface* newSurface(const SkImageInfo&, const SkSurfaceProps&) override; 165 166 SkImageFilter::Cache* getImageFilterCache() override; 167 168 bool forceConservativeRasterClip() const override { return true; } 169 170 // sets the render target and clip on context 171 void prepareDraw(const SkDraw&); 172 173 /** 174 * Implementation for both drawBitmap and drawBitmapRect. 175 */ 176 void drawBitmapCommon(const SkDraw&, 177 const SkBitmap& bitmap, 178 const SkRect* srcRectPtr, 179 const SkSize* dstSizePtr, // ignored iff srcRectPtr == NULL 180 const SkPaint&, 181 SkCanvas::DrawBitmapRectFlags flags); 182 183 /** 184 * Helper functions called by drawBitmapCommon. By the time these are called the SkDraw's 185 * matrix, clip, and the device's render target has already been set on GrContext. 186 */ 187 188 // The tileSize and clippedSrcRect will be valid only if true is returned. 189 bool shouldTileBitmap(const SkBitmap& bitmap, 190 const SkMatrix& viewMatrix, 191 const GrTextureParams& sampler, 192 const SkRect* srcRectPtr, 193 int maxTileSize, 194 int* tileSize, 195 SkIRect* clippedSrcRect) const; 196 void internalDrawBitmap(const SkBitmap&, 197 const SkMatrix& viewMatrix, 198 const SkRect&, 199 const GrTextureParams& params, 200 const SkPaint& paint, 201 SkCanvas::DrawBitmapRectFlags flags, 202 bool bicubic, 203 bool needsTextureDomain); 204 void drawTiledBitmap(const SkBitmap& bitmap, 205 const SkMatrix& viewMatrix, 206 const SkRect& srcRect, 207 const SkIRect& clippedSrcRect, 208 const GrTextureParams& params, 209 const SkPaint& paint, 210 SkCanvas::DrawBitmapRectFlags flags, 211 int tileSize, 212 bool bicubic); 213 214 void internalDrawPath(const SkPath& origSrcPath, const SkPaint& paint, 215 const SkMatrix& origViewMatrix, const SkMatrix* prePathMatrix, 216 const SkIRect& clipBounds, bool pathIsMutable); 217 218 bool drawDashLine(const SkPoint pts[2], const SkPaint& paint); 219 220 static SkPicture::AccelData::Key ComputeAccelDataKey(); 221 222 static GrRenderTarget* CreateRenderTarget(GrContext*, SkSurface::Budgeted, const SkImageInfo&, 223 int sampleCount); 224 225 friend class GrAtlasTextContext; 226 friend class GrTextContext; 227 typedef SkBaseDevice INHERITED; 228 }; 229 230 #endif 231
