1 2 /* 3 * Copyright 2012 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 #ifndef SkBBoxRecord_DEFINED 10 #define SkBBoxRecord_DEFINED 11 12 #include "SkPictureRecord.h" 13 14 /** 15 * This is an abstract SkPictureRecord subclass that intercepts draw calls and computes an 16 * axis-aligned bounding box for each draw that it sees, subclasses implement handleBBox() 17 * which will be called every time we get a new bounding box. 18 */ 19 class SkBBoxRecord : public SkPictureRecord { 20 public: 21 22 SkBBoxRecord(uint32_t recordFlags, SkDevice* device) 23 : INHERITED(recordFlags, device) { } 24 virtual ~SkBBoxRecord() { } 25 26 /** 27 * This is called each time we get a bounding box, it will be axis-aligned, 28 * in device coordinates, and expanded to include stroking, shadows, etc. 29 */ 30 virtual void handleBBox(const SkRect& bbox) = 0; 31 32 virtual void drawOval(const SkRect& rect, const SkPaint& paint) SK_OVERRIDE; 33 virtual void drawRRect(const SkRRect& rrect, const SkPaint& paint) SK_OVERRIDE; 34 virtual void drawRect(const SkRect& rect, const SkPaint& paint) SK_OVERRIDE; 35 virtual void drawPath(const SkPath& path, const SkPaint& paint) SK_OVERRIDE; 36 virtual void drawPoints(PointMode mode, size_t count, const SkPoint pts[], 37 const SkPaint& paint) SK_OVERRIDE; 38 virtual void drawPaint(const SkPaint& paint) SK_OVERRIDE; 39 virtual void clear(SkColor) SK_OVERRIDE; 40 virtual void drawText(const void* text, size_t byteLength, SkScalar x, SkScalar y, 41 const SkPaint& paint) SK_OVERRIDE; 42 virtual void drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top, 43 const SkPaint* paint = NULL) SK_OVERRIDE; 44 virtual void drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src, 45 const SkRect& dst, const SkPaint* paint) SK_OVERRIDE; 46 virtual void drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& mat, 47 const SkPaint* paint) SK_OVERRIDE; 48 virtual void drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center, 49 const SkRect& dst, const SkPaint* paint) SK_OVERRIDE; 50 virtual void drawPosText(const void* text, size_t byteLength, 51 const SkPoint pos[], const SkPaint& paint) SK_OVERRIDE; 52 virtual void drawPosTextH(const void* text, size_t byteLength, 53 const SkScalar xpos[], SkScalar constY, 54 const SkPaint& paint) SK_OVERRIDE; 55 virtual void drawSprite(const SkBitmap& bitmap, int left, int top, 56 const SkPaint* paint) SK_OVERRIDE; 57 virtual void drawTextOnPath(const void* text, size_t byteLength, 58 const SkPath& path, const SkMatrix* matrix, 59 const SkPaint& paint) SK_OVERRIDE; 60 virtual void drawVertices(VertexMode mode, int vertexCount, 61 const SkPoint vertices[], const SkPoint texs[], 62 const SkColor colors[], SkXfermode* xfer, 63 const uint16_t indices[], int indexCount, 64 const SkPaint& paint) SK_OVERRIDE; 65 virtual void drawPicture(SkPicture& picture) SK_OVERRIDE; 66 67 private: 68 /** 69 * Takes a bounding box in current canvas view space, accounts for stroking and effects, and 70 * computes an axis-aligned bounding box in device coordinates, then passes it to handleBBox() 71 * returns false if the draw is completely clipped out, and may safely be ignored. 72 **/ 73 bool transformBounds(const SkRect& bounds, const SkPaint* paint); 74 75 typedef SkPictureRecord INHERITED; 76 }; 77 78 #endif 79
