1 files changed, 90 insertions, 0 deletions
diff --git a/include/utils/SkProxyCanvas.h b/include/utils/SkProxyCanvas.h
new file mode 100644
index 0000000..1bc411a
--- /dev/null
+++ b/include/utils/SkProxyCanvas.h
@@ -0,0 +1,90 @@
+#ifndef SkProxyCanvas_DEFINED
+#define SkProxyCanvas_DEFINED
+
+#include "SkCanvas.h"
+
+/** This class overrides all virtual methods on SkCanvas, and redirects them
+    to a "proxy", another SkCanvas instance. It can be the basis for
+    intercepting (and possibly modifying) calls to a canvas.
+ 
+    There must be a proxy installed before the proxycanvas can be used (i.e.
+    before its virtual methods can be called).
+ */
+class SkProxyCanvas : public SkCanvas {
+public:
+    SkProxyCanvas() : fProxy(NULL) {}
+    SkProxyCanvas(SkCanvas* proxy);
+    virtual ~SkProxyCanvas();
+    
+    SkCanvas*   getProxy() const { return fProxy; }
+    void        setProxy(SkCanvas* proxy);
+    
+    // overrides from SkCanvas
+
+    virtual bool getViewport(SkIPoint* size) const;
+    virtual bool setViewport(int x, int y);
+    
+    virtual SkDevice* setBitmapDevice(const SkBitmap& bitmap);
+
+    virtual int save(SaveFlags flags = kMatrixClip_SaveFlag);
+    virtual int saveLayer(const SkRect* bounds, const SkPaint* paint,
+                          SaveFlags flags = kARGB_ClipLayer_SaveFlag);
+    virtual void restore();
+
+    virtual bool translate(SkScalar dx, SkScalar dy);
+    virtual bool scale(SkScalar sx, SkScalar sy);
+    virtual bool rotate(SkScalar degrees);
+    virtual bool skew(SkScalar sx, SkScalar sy);
+    virtual bool concat(const SkMatrix& matrix);
+    virtual void setMatrix(const SkMatrix& matrix);
+    
+    virtual bool clipRect(const SkRect& rect,
+                          SkRegion::Op op = SkRegion::kIntersect_Op);
+    virtual bool clipPath(const SkPath& path,
+                          SkRegion::Op op = SkRegion::kIntersect_Op);
+    virtual bool clipRegion(const SkRegion& deviceRgn,
+                            SkRegion::Op op = SkRegion::kIntersect_Op);
+
+    virtual void drawPaint(const SkPaint& paint);
+    virtual void drawPoints(PointMode mode, size_t count, const SkPoint pts[],
+                            const SkPaint& paint);
+    virtual void drawRect(const SkRect& rect, const SkPaint& paint);
+    virtual void drawPath(const SkPath& path, const SkPaint& paint);
+    virtual void drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top,
+                            const SkPaint* paint = NULL);
+    virtual void drawBitmapRect(const SkBitmap& bitmap, const SkIRect* src,
+                                const SkRect& dst, const SkPaint* paint = NULL);
+    virtual void drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& m,
+                                  const SkPaint* paint = NULL);
+    virtual void drawSprite(const SkBitmap& bitmap, int left, int top,
+                            const SkPaint* paint = NULL);
+    virtual void drawText(const void* text, size_t byteLength, SkScalar x,
+                          SkScalar y, const SkPaint& paint);
+    virtual void drawPosText(const void* text, size_t byteLength,
+                             const SkPoint pos[], const SkPaint& paint);
+    virtual void drawPosTextH(const void* text, size_t byteLength,
+                              const SkScalar xpos[], SkScalar constY,
+                              const SkPaint& paint);
+    virtual void drawTextOnPath(const void* text, size_t byteLength,
+                                const SkPath& path, const SkMatrix* matrix,
+                                const SkPaint& paint);
+    virtual void drawPicture(SkPicture& picture);
+    virtual void drawVertices(VertexMode vmode, int vertexCount,
+                              const SkPoint vertices[], const SkPoint texs[],
+                              const SkColor colors[], SkXfermode* xmode,
+                              const uint16_t indices[], int indexCount,
+                              const SkPaint& paint);
+    
+    virtual SkBounder* setBounder(SkBounder* bounder);
+    virtual SkDrawFilter* setDrawFilter(SkDrawFilter* filter);
+
+    virtual SkDevice* createDevice(SkBitmap::Config, int width, int height,
+                                   bool isOpaque, bool isForLayer);
+
+private:
+    SkCanvas*   fProxy;
+    
+    typedef SkCanvas INHERITED;
+};
+
+#endif