reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame^] | 1 | #ifndef SkProxyCanvas_DEFINED |
| 2 | #define SkProxyCanvas_DEFINED |
| 3 | |
| 4 | #include "SkCanvas.h" |
| 5 | |
| 6 | /** This class overrides all virtual methods on SkCanvas, and redirects them |
| 7 | to a "proxy", another SkCanvas instance. It can be the basis for |
| 8 | intercepting (and possibly modifying) calls to a canvas. |
| 9 | |
| 10 | There must be a proxy installed before the proxycanvas can be used (i.e. |
| 11 | before its virtual methods can be called). |
| 12 | */ |
| 13 | class SkProxyCanvas : public SkCanvas { |
| 14 | public: |
| 15 | SkProxyCanvas() : fProxy(NULL) {} |
| 16 | SkProxyCanvas(SkCanvas* proxy); |
| 17 | virtual ~SkProxyCanvas(); |
| 18 | |
| 19 | SkCanvas* getProxy() const { return fProxy; } |
| 20 | void setProxy(SkCanvas* proxy); |
| 21 | |
| 22 | // overrides from SkCanvas |
| 23 | |
| 24 | virtual bool getViewport(SkIPoint* size) const; |
| 25 | virtual bool setViewport(int x, int y); |
| 26 | |
| 27 | virtual SkDevice* setBitmapDevice(const SkBitmap& bitmap); |
| 28 | |
| 29 | virtual int save(SaveFlags flags = kMatrixClip_SaveFlag); |
| 30 | virtual int saveLayer(const SkRect* bounds, const SkPaint* paint, |
| 31 | SaveFlags flags = kARGB_ClipLayer_SaveFlag); |
| 32 | virtual void restore(); |
| 33 | |
| 34 | virtual bool translate(SkScalar dx, SkScalar dy); |
| 35 | virtual bool scale(SkScalar sx, SkScalar sy); |
| 36 | virtual bool rotate(SkScalar degrees); |
| 37 | virtual bool skew(SkScalar sx, SkScalar sy); |
| 38 | virtual bool concat(const SkMatrix& matrix); |
| 39 | virtual void setMatrix(const SkMatrix& matrix); |
| 40 | |
| 41 | virtual bool clipRect(const SkRect& rect, |
| 42 | SkRegion::Op op = SkRegion::kIntersect_Op); |
| 43 | virtual bool clipPath(const SkPath& path, |
| 44 | SkRegion::Op op = SkRegion::kIntersect_Op); |
| 45 | virtual bool clipRegion(const SkRegion& deviceRgn, |
| 46 | SkRegion::Op op = SkRegion::kIntersect_Op); |
| 47 | |
| 48 | virtual void drawPaint(const SkPaint& paint); |
| 49 | virtual void drawPoints(PointMode mode, size_t count, const SkPoint pts[], |
| 50 | const SkPaint& paint); |
| 51 | virtual void drawRect(const SkRect& rect, const SkPaint& paint); |
| 52 | virtual void drawPath(const SkPath& path, const SkPaint& paint); |
| 53 | virtual void drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top, |
| 54 | const SkPaint* paint = NULL); |
| 55 | virtual void drawBitmapRect(const SkBitmap& bitmap, const SkIRect* src, |
| 56 | const SkRect& dst, const SkPaint* paint = NULL); |
| 57 | virtual void drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& m, |
| 58 | const SkPaint* paint = NULL); |
| 59 | virtual void drawSprite(const SkBitmap& bitmap, int left, int top, |
| 60 | const SkPaint* paint = NULL); |
| 61 | virtual void drawText(const void* text, size_t byteLength, SkScalar x, |
| 62 | SkScalar y, const SkPaint& paint); |
| 63 | virtual void drawPosText(const void* text, size_t byteLength, |
| 64 | const SkPoint pos[], const SkPaint& paint); |
| 65 | virtual void drawPosTextH(const void* text, size_t byteLength, |
| 66 | const SkScalar xpos[], SkScalar constY, |
| 67 | const SkPaint& paint); |
| 68 | virtual void drawTextOnPath(const void* text, size_t byteLength, |
| 69 | const SkPath& path, const SkMatrix* matrix, |
| 70 | const SkPaint& paint); |
| 71 | virtual void drawPicture(SkPicture& picture); |
| 72 | virtual void drawVertices(VertexMode vmode, int vertexCount, |
| 73 | const SkPoint vertices[], const SkPoint texs[], |
| 74 | const SkColor colors[], SkXfermode* xmode, |
| 75 | const uint16_t indices[], int indexCount, |
| 76 | const SkPaint& paint); |
| 77 | |
| 78 | virtual SkBounder* setBounder(SkBounder* bounder); |
| 79 | virtual SkDrawFilter* setDrawFilter(SkDrawFilter* filter); |
| 80 | |
| 81 | virtual SkDevice* createDevice(SkBitmap::Config, int width, int height, |
| 82 | bool isOpaque, bool isForLayer); |
| 83 | |
| 84 | private: |
| 85 | SkCanvas* fProxy; |
| 86 | |
| 87 | typedef SkCanvas INHERITED; |
| 88 | }; |
| 89 | |
| 90 | #endif |