2 * Copyright 2013 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
8 #ifndef SkNulCanvas_DEFINED
9 #define SkNulCanvas_DEFINED
13 /** \class SkNulCanvas
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.
19 class SK_API SkNulCanvas : public SkCanvas {
21 SK_DECLARE_INST_COUNT(SkNulCanvas);
24 explicit SkNulCanvas(SkBaseDevice* device) : SkCanvas(device) {}
26 explicit SkNulCanvas(const SkBitmap& bitmap) : SkCanvas(bitmap) {}
27 virtual ~SkNulCanvas() {}
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,
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;}
61 virtual bool isClipEmpty() const SK_OVERRIDE { return false; }
62 virtual bool getClipBounds(SkRect* bounds) const SK_OVERRIDE {
65 SkIntToScalar(this->imageInfo().width()),
66 SkIntToScalar(this->imageInfo().height()));
70 virtual bool getClipDeviceBounds(SkIRect* bounds) const SK_OVERRIDE {
78 virtual SkCanvas* canvasForDrawIter() {return NULL;}
79 virtual SkBaseDevice* setDevice(SkBaseDevice* device) {return NULL;}
81 virtual SaveLayerStrategy willSaveLayer(const SkRect* bounds, const SkPaint* paint,
82 SaveFlags flags) SK_OVERRIDE {
83 this->INHERITED::willSaveLayer(bounds, paint, flags);
84 return kNoLayer_SaveLayerStrategy;
87 virtual void onDrawText(const void* text, size_t byteLength, SkScalar x,
88 SkScalar y, const SkPaint& paint) SK_OVERRIDE {}
89 virtual void onDrawPosText(const void* text, size_t byteLength,
90 const SkPoint pos[], const SkPaint& paint) SK_OVERRIDE {}
91 virtual void onDrawPosTextH(const void* text, size_t byteLength,
92 const SkScalar xpos[], SkScalar constY,
93 const SkPaint& paint) SK_OVERRIDE {}
94 virtual void onDrawTextOnPath(const void* text, size_t byteLength,
95 const SkPath& path, const SkMatrix* matrix,
96 const SkPaint& paint) SK_OVERRIDE {}
98 virtual void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE {}
99 virtual void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE {}
100 virtual void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE {}
101 virtual void onClipRegion(const SkRegion&, SkRegion::Op) SK_OVERRIDE {}
103 virtual void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) SK_OVERRIDE {}
106 typedef SkCanvas INHERITED;
109 #endif // SkNulCanvas_DEFINED