michael@0: 
michael@0: /*
michael@0:  * Copyright 2012 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #ifndef SkBBoxRecord_DEFINED
michael@0: #define SkBBoxRecord_DEFINED
michael@0: 
michael@0: #include "SkPictureRecord.h"
michael@0: 
michael@0: /**
michael@0:   * This is an abstract SkPictureRecord subclass that intercepts draw calls and computes an
michael@0:   * axis-aligned bounding box for each draw that it sees, subclasses implement handleBBox()
michael@0:   * which will be called every time we get a new bounding box.
michael@0:   */
michael@0: class SkBBoxRecord : public SkPictureRecord {
michael@0: public:
michael@0: 
michael@0:     SkBBoxRecord(const SkISize& size, uint32_t recordFlags) : INHERITED(size, recordFlags) {}
michael@0:     virtual ~SkBBoxRecord() { }
michael@0: 
michael@0:     /**
michael@0:      * This is called each time we get a bounding box, it will be axis-aligned,
michael@0:      * in device coordinates, and expanded to include stroking, shadows, etc.
michael@0:      */
michael@0:     virtual void handleBBox(const SkRect& bbox) = 0;
michael@0: 
michael@0:     virtual void drawOval(const SkRect& rect, const SkPaint& paint) SK_OVERRIDE;
michael@0:     virtual void drawRRect(const SkRRect& rrect, const SkPaint& paint) SK_OVERRIDE;
michael@0:     virtual void drawRect(const SkRect& rect, const SkPaint& paint) SK_OVERRIDE;
michael@0:     virtual void drawPath(const SkPath& path, const SkPaint& paint) SK_OVERRIDE;
michael@0:     virtual void drawPoints(PointMode mode, size_t count, const SkPoint pts[],
michael@0:                             const SkPaint& paint) SK_OVERRIDE;
michael@0:     virtual void drawPaint(const SkPaint& paint) SK_OVERRIDE;
michael@0:     virtual void clear(SkColor) SK_OVERRIDE;
michael@0:     virtual void drawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
michael@0:                           const SkPaint& paint) SK_OVERRIDE;
michael@0:     virtual void drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top,
michael@0:                             const SkPaint* paint = NULL) SK_OVERRIDE;
michael@0:     virtual void drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src,
michael@0:                                       const SkRect& dst, const SkPaint* paint,
michael@0:                                       DrawBitmapRectFlags flags) SK_OVERRIDE;
michael@0:     virtual void drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& mat,
michael@0:                                   const SkPaint* paint) SK_OVERRIDE;
michael@0:     virtual void drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
michael@0:                                 const SkRect& dst, const SkPaint* paint) SK_OVERRIDE;
michael@0:     virtual void drawPosText(const void* text, size_t byteLength,
michael@0:                              const SkPoint pos[], const SkPaint& paint) SK_OVERRIDE;
michael@0:     virtual void drawPosTextH(const void* text, size_t byteLength,
michael@0:                               const SkScalar xpos[], SkScalar constY,
michael@0:                               const SkPaint& paint) SK_OVERRIDE;
michael@0:     virtual void drawSprite(const SkBitmap& bitmap, int left, int top,
michael@0:                             const SkPaint* paint) SK_OVERRIDE;
michael@0:     virtual void drawTextOnPath(const void* text, size_t byteLength,
michael@0:                                 const SkPath& path, const SkMatrix* matrix,
michael@0:                                 const SkPaint& paint) SK_OVERRIDE;
michael@0:     virtual void drawVertices(VertexMode mode, int vertexCount,
michael@0:                               const SkPoint vertices[], const SkPoint texs[],
michael@0:                               const SkColor colors[], SkXfermode* xfer,
michael@0:                               const uint16_t indices[], int indexCount,
michael@0:                               const SkPaint& paint) SK_OVERRIDE;
michael@0:     virtual void drawPicture(SkPicture& picture) SK_OVERRIDE;
michael@0: 
michael@0: protected:
michael@0:     virtual void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) SK_OVERRIDE;
michael@0: 
michael@0: private:
michael@0:     /**
michael@0:      * Takes a bounding box in current canvas view space, accounts for stroking and effects, and
michael@0:      * computes an axis-aligned bounding box in device coordinates, then passes it to handleBBox()
michael@0:      * returns false if the draw is completely clipped out, and may safely be ignored.
michael@0:      **/
michael@0:     bool transformBounds(const SkRect& bounds, const SkPaint* paint);
michael@0: 
michael@0:     typedef SkPictureRecord INHERITED;
michael@0: };
michael@0: 
michael@0: #endif