blob: 455a3dace3bd664fb4172f5acaf4bff8d70537ad (
plain)
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
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
/*
* Copyright 2008 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkFlipPixelRef_DEFINED
#define SkFlipPixelRef_DEFINED
#include "SkBitmap.h"
#include "SkPageFlipper.h"
#include "SkPixelRef.h"
#include "SkThread.h"
class SkRegion;
class SkFlipPixelRef : public SkPixelRef {
public:
SkFlipPixelRef(SkBitmap::Config, int width, int height);
virtual ~SkFlipPixelRef();
bool isDirty() const { return fFlipper.isDirty(); }
const SkRegion& dirtyRgn() const { return fFlipper.dirtyRgn(); }
void inval() { fFlipper.inval(); }
void inval(const SkIRect& rect) { fFlipper.inval(rect); }
void inval(const SkRegion& rgn) { fFlipper.inval(rgn); }
void inval(const SkRect& r, bool doAA) { fFlipper.inval(r, doAA); }
const SkRegion& beginUpdate(SkBitmap* device);
void endUpdate();
private:
void getFrontBack(const void** front, void** back) const {
if (front) {
*front = fPage0;
}
if (back) {
*back = fPage1;
}
}
void swapPages();
// Helper to copy pixels from srcAddr to the dst bitmap, clipped to clip.
// srcAddr points to memory with the same config as dst.
static void CopyBitsFromAddr(const SkBitmap& dst, const SkRegion& clip,
const void* srcAddr);
// serialization
public:
virtual Factory getFactory() const { return Create; }
virtual void flatten(SkFlattenableWriteBuffer&) const;
static SkPixelRef* Create(SkFlattenableReadBuffer& buffer);
SK_DECLARE_PIXEL_REF_REGISTRAR()
protected:
virtual void* onLockPixels(SkColorTable**);
virtual void onUnlockPixels();
SkFlipPixelRef(SkFlattenableReadBuffer&);
private:
SkMutex fMutex;
SkPageFlipper fFlipper;
void* fStorage;
void* fPage0; // points into fStorage;
void* fPage1; // points into fStorage;
size_t fSize; // size of 1 page. fStorage holds 2 pages
SkBitmap::Config fConfig;
typedef SkPixelRef INHERITED;
};
class SkAutoFlipUpdate : SkNoncopyable {
public:
SkAutoFlipUpdate(SkFlipPixelRef* ref) : fRef(ref) {
fDirty = &ref->beginUpdate(&fBitmap);
}
~SkAutoFlipUpdate() {
if (fRef) {
fRef->endUpdate();
}
}
const SkBitmap& bitmap() const { return fBitmap; }
const SkRegion& dirty() const { return *fDirty; }
// optional. This gets automatically called in the destructor (only once)
void endUpdate() {
if (fRef) {
fRef->endUpdate();
fRef = NULL;
}
}
private:
SkFlipPixelRef* fRef;
SkBitmap fBitmap;
const SkRegion* fDirty;
};
#endif
|
