1 /* 2 * Copyright 2013 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkNulCanvas_DEFINED 9 #define SkNulCanvas_DEFINED 10 11 #include "SkCanvas.h" 12 13 /** \class SkNulCanvas 14 * 15 * Nul Canvas is a canvas that does nothing. It is used to measure the perf of just parsing 16 * a pdf, without actually rendering anything. 17 * 18 */ 19 class SK_API SkNulCanvas : public SkCanvas { 20 public: 21 SK_DECLARE_INST_COUNT(SkNulCanvas); 22 23 SkNulCanvas() {} 24 explicit SkNulCanvas(SkBaseDevice* device) : SkCanvas(device) {} 25 26 explicit SkNulCanvas(const SkBitmap& bitmap) : SkCanvas(bitmap) {} 27 virtual ~SkNulCanvas() {} 28 29 virtual bool isDrawingToLayer() const SK_OVERRIDE {return false;} 30 virtual void clear(SkColor) SK_OVERRIDE {} 31 virtual void drawPaint(const SkPaint& paint) SK_OVERRIDE {} 32 virtual void drawPoints(PointMode mode, size_t count, const SkPoint pts[], 33 const SkPaint& paint) SK_OVERRIDE {} 34 virtual void drawRect(const SkRect& rect, const SkPaint& paint) SK_OVERRIDE {} 35 virtual void drawOval(const SkRect& oval, const SkPaint&) SK_OVERRIDE {} 36 virtual void drawRRect(const SkRRect& rrect, const SkPaint& paint) SK_OVERRIDE {} 37 virtual void drawPath(const SkPath& path, const SkPaint& paint) SK_OVERRIDE {} 38 virtual void drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top, 39 const SkPaint* paint = NULL) SK_OVERRIDE {} 40 virtual void drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src, 41 const SkRect& dst, 42 const SkPaint* paint, 43 DrawBitmapRectFlags flags) SK_OVERRIDE {} 44 virtual void drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& m, 45 const SkPaint* paint = NULL) SK_OVERRIDE {} 46 virtual void drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center, 47 const SkRect& dst, const SkPaint* paint = NULL) SK_OVERRIDE {} 48 virtual void drawSprite(const SkBitmap& bitmap, int left, int top, 49 const SkPaint* paint = NULL) SK_OVERRIDE {} 50 virtual void drawVertices(VertexMode vmode, int vertexCount, 51 const SkPoint vertices[], const SkPoint texs[], 52 const SkColor colors[], SkXfermode* xmode, 53 const uint16_t indices[], int indexCount, 54 const SkPaint& paint) SK_OVERRIDE {} 55 virtual void drawData(const void* data, size_t length) SK_OVERRIDE {} 56 virtual void beginCommentGroup(const char* description) SK_OVERRIDE {} 57 virtual void addComment(const char* kywd, const char* value) SK_OVERRIDE {} 58 virtual void endCommentGroup() SK_OVERRIDE {} 59 virtual SkDrawFilter* setDrawFilter(SkDrawFilter* filter) SK_OVERRIDE {return NULL;} 60 61 virtual bool isClipEmpty() const SK_OVERRIDE { return false; } 62 #ifdef SK_SUPPORT_LEGACY_GETCLIPTYPE 63 virtual ClipType getClipType() const SK_OVERRIDE { return kRect_ClipType; } 64 #endif 65 virtual bool getClipBounds(SkRect* bounds) const SK_OVERRIDE { 66 if (NULL != bounds) { 67 bounds->setXYWH(0, 0, 68 SkIntToScalar(this->imageInfo().fWidth), 69 SkIntToScalar(this->imageInfo().fHeight)); 70 } 71 return true; 72 } 73 virtual bool getClipDeviceBounds(SkIRect* bounds) const SK_OVERRIDE { 74 if (NULL != bounds) { 75 bounds->setLargest(); 76 } 77 return true; 78 } 79 80 protected: 81 virtual SkCanvas* canvasForDrawIter() {return NULL;} 82 virtual SkBaseDevice* setDevice(SkBaseDevice* device) {return NULL;} 83 84 virtual SaveLayerStrategy willSaveLayer(const SkRect* bounds, const SkPaint* paint, 85 SaveFlags flags) SK_OVERRIDE { 86 this->INHERITED::willSaveLayer(bounds, paint, flags); 87 return kNoLayer_SaveLayerStrategy; 88 } 89 90 virtual void onDrawText(const void* text, size_t byteLength, SkScalar x, 91 SkScalar y, const SkPaint& paint) SK_OVERRIDE {} 92 virtual void onDrawPosText(const void* text, size_t byteLength, 93 const SkPoint pos[], const SkPaint& paint) SK_OVERRIDE {} 94 virtual void onDrawPosTextH(const void* text, size_t byteLength, 95 const SkScalar xpos[], SkScalar constY, 96 const SkPaint& paint) SK_OVERRIDE {} 97 virtual void onDrawTextOnPath(const void* text, size_t byteLength, 98 const SkPath& path, const SkMatrix* matrix, 99 const SkPaint& paint) SK_OVERRIDE {} 100 101 virtual void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE {} 102 virtual void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE {} 103 virtual void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE {} 104 virtual void onClipRegion(const SkRegion&, SkRegion::Op) SK_OVERRIDE {} 105 106 virtual void onDrawPicture(const SkPicture* picture) SK_OVERRIDE {} 107 108 private: 109 typedef SkCanvas INHERITED; 110 }; 111 112 #endif // SkNulCanvas_DEFINED 113
