1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkBBoxRecord_DEFINED
#define SkBBoxRecord_DEFINED
#include "SkPictureRecord.h"
/**
* This is an abstract SkPictureRecord subclass that intercepts draw calls and computes an
* axis-aligned bounding box for each draw that it sees, subclasses implement handleBBox()
* which will be called every time we get a new bounding box.
*/
class SkBBoxRecord : public SkPictureRecord {
public:
SkBBoxRecord(uint32_t recordFlags, SkDevice* device)
: INHERITED(recordFlags, device) { }
virtual ~SkBBoxRecord() { }
/**
* This is called each time we get a bounding box, it will be axis-aligned,
* in device coordinates, and expanded to include stroking, shadows, etc.
*/
virtual void handleBBox(const SkRect& bbox) = 0;
virtual void drawOval(const SkRect& rect, const SkPaint& paint) SK_OVERRIDE;
virtual void drawRRect(const SkRRect& rrect, const SkPaint& paint) SK_OVERRIDE;
virtual void drawRect(const SkRect& rect, const SkPaint& paint) SK_OVERRIDE;
virtual void drawPath(const SkPath& path, const SkPaint& paint) SK_OVERRIDE;
virtual void drawPoints(PointMode mode, size_t count, const SkPoint pts[],
const SkPaint& paint) SK_OVERRIDE;
virtual void drawPaint(const SkPaint& paint) SK_OVERRIDE;
virtual void clear(SkColor) SK_OVERRIDE;
virtual void drawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
const SkPaint& paint) SK_OVERRIDE;
virtual void drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top,
const SkPaint* paint = NULL) SK_OVERRIDE;
virtual void drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src,
const SkRect& dst, const SkPaint* paint) SK_OVERRIDE;
virtual void drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& mat,
const SkPaint* paint) SK_OVERRIDE;
virtual void drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
const SkRect& dst, const SkPaint* paint) SK_OVERRIDE;
virtual void drawPosText(const void* text, size_t byteLength,
const SkPoint pos[], const SkPaint& paint) SK_OVERRIDE;
virtual void drawPosTextBounded(const void* text, size_t byteLength,
const SkPoint pos[], const SkRect& bbox,
const SkPaint& paint) SK_OVERRIDE;
virtual void drawPosTextH(const void* text, size_t byteLength,
const SkScalar xpos[], SkScalar constY,
const SkPaint& paint) SK_OVERRIDE;
virtual void drawSprite(const SkBitmap& bitmap, int left, int top,
const SkPaint* paint) SK_OVERRIDE;
virtual void drawTextOnPath(const void* text, size_t byteLength,
const SkPath& path, const SkMatrix* matrix,
const SkPaint& paint) SK_OVERRIDE;
virtual void drawVertices(VertexMode mode, int vertexCount,
const SkPoint vertices[], const SkPoint texs[],
const SkColor colors[], SkXfermode* xfer,
const uint16_t indices[], int indexCount,
const SkPaint& paint) SK_OVERRIDE;
virtual void drawPicture(SkPicture& picture) SK_OVERRIDE;
private:
/**
* Takes a bounding box in current canvas view space, accounts for stroking and effects, and
* computes an axis-aligned bounding box in device coordinates, then passes it to handleBBox()
* returns false if the draw is completely clipped out, and may safely be ignored.
**/
bool transformBounds(const SkRect& bounds, const SkPaint* paint);
typedef SkPictureRecord INHERITED;
};
#endif
|
