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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkImage_Base.h"
#include "SkImagePriv.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkData.h"
#include "SkDataPixelRef.h"
class SkImage_Raster : public SkImage_Base {
public:
static bool ValidArgs(const Info& info, size_t rowBytes) {
const int maxDimension = SK_MaxS32 >> 2;
const size_t kMaxPixelByteSize = SK_MaxS32;
if (info.fWidth < 0 || info.fHeight < 0) {
return false;
}
if (info.fWidth > maxDimension || info.fHeight > maxDimension) {
return false;
}
if ((unsigned)info.fColorType > (unsigned)kLastEnum_ColorType) {
return false;
}
if ((unsigned)info.fAlphaType > (unsigned)kLastEnum_AlphaType) {
return false;
}
bool isOpaque;
if (SkImageInfoToBitmapConfig(info, &isOpaque) == SkBitmap::kNo_Config) {
return false;
}
// TODO: check colorspace
if (rowBytes < SkImageMinRowBytes(info)) {
return false;
}
int64_t size = (int64_t)info.fHeight * rowBytes;
if (size > (int64_t)kMaxPixelByteSize) {
return false;
}
return true;
}
static SkImage* NewEmpty();
SkImage_Raster(const SkImage::Info&, SkData*, size_t rb);
virtual ~SkImage_Raster();
virtual void onDraw(SkCanvas*, SkScalar, SkScalar, const SkPaint*) SK_OVERRIDE;
// exposed for SkSurface_Raster via SkNewImageFromPixelRef
SkImage_Raster(const SkImage::Info&, SkPixelRef*, size_t rowBytes);
SkPixelRef* getPixelRef() const { return fBitmap.pixelRef(); }
private:
SkImage_Raster() : INHERITED(0, 0) {}
SkBitmap fBitmap;
typedef SkImage_Base INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
SkImage* SkImage_Raster::NewEmpty() {
// Returns lazily created singleton
static SkImage* gEmpty;
if (NULL == gEmpty) {
gEmpty = SkNEW(SkImage_Raster);
}
gEmpty->ref();
return gEmpty;
}
SkImage_Raster::SkImage_Raster(const Info& info, SkData* data, size_t rowBytes)
: INHERITED(info.fWidth, info.fHeight) {
bool isOpaque;
SkBitmap::Config config = SkImageInfoToBitmapConfig(info, &isOpaque);
fBitmap.setConfig(config, info.fWidth, info.fHeight, rowBytes);
fBitmap.setPixelRef(SkNEW_ARGS(SkDataPixelRef, (data)))->unref();
fBitmap.setIsOpaque(isOpaque);
fBitmap.setImmutable();
}
SkImage_Raster::SkImage_Raster(const Info& info, SkPixelRef* pr, size_t rowBytes)
: INHERITED(info.fWidth, info.fHeight) {
bool isOpaque;
SkBitmap::Config config = SkImageInfoToBitmapConfig(info, &isOpaque);
fBitmap.setConfig(config, info.fWidth, info.fHeight, rowBytes);
fBitmap.setPixelRef(pr);
fBitmap.setIsOpaque(isOpaque);
}
SkImage_Raster::~SkImage_Raster() {}
void SkImage_Raster::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) {
canvas->drawBitmap(fBitmap, x, y, paint);
}
///////////////////////////////////////////////////////////////////////////////
SkImage* SkImage::NewRasterCopy(const SkImage::Info& info, const void* pixels, size_t rowBytes) {
if (!SkImage_Raster::ValidArgs(info, rowBytes)) {
return NULL;
}
if (0 == info.fWidth && 0 == info.fHeight) {
return SkImage_Raster::NewEmpty();
}
// check this after empty-check
if (NULL == pixels) {
return NULL;
}
// Here we actually make a copy of the caller's pixel data
SkAutoDataUnref data(SkData::NewWithCopy(pixels, info.fHeight * rowBytes));
return SkNEW_ARGS(SkImage_Raster, (info, data, rowBytes));
}
SkImage* SkImage::NewRasterData(const SkImage::Info& info, SkData* pixelData, size_t rowBytes) {
if (!SkImage_Raster::ValidArgs(info, rowBytes)) {
return NULL;
}
if (0 == info.fWidth && 0 == info.fHeight) {
return SkImage_Raster::NewEmpty();
}
// check this after empty-check
if (NULL == pixelData) {
return NULL;
}
// did they give us enough data?
size_t size = info.fHeight * rowBytes;
if (pixelData->size() < size) {
return NULL;
}
SkAutoDataUnref data(pixelData);
return SkNEW_ARGS(SkImage_Raster, (info, data, rowBytes));
}
SkImage* SkNewImageFromPixelRef(const SkImage::Info& info, SkPixelRef* pr,
size_t rowBytes) {
return SkNEW_ARGS(SkImage_Raster, (info, pr, rowBytes));
}
SkPixelRef* SkBitmapImageGetPixelRef(SkImage* image) {
return ((SkImage_Raster*)image)->getPixelRef();
}
|
