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
161
162
163
164
165
166
167
168
169
|
// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "base/gfx/platform_canvas_mac.h"
#include "base/gfx/bitmap_platform_device_mac.h"
#include "base/logging.h"
namespace gfx {
PlatformCanvasMac::PlatformCanvasMac() : SkCanvas() {
}
PlatformCanvasMac::PlatformCanvasMac(int width, int height, bool is_opaque)
: SkCanvas() {
initialize(width, height, is_opaque, NULL);
}
PlatformCanvasMac::PlatformCanvasMac(int width,
int height,
bool is_opaque,
CGContextRef context)
: SkCanvas() {
initialize(width, height, is_opaque, context);
}
PlatformCanvasMac::~PlatformCanvasMac() {
}
void PlatformCanvasMac::initialize(int width,
int height,
bool is_opaque,
CGContextRef context) {
SkDevice* device =
createPlatformDevice(width, height, is_opaque, context);
setDevice(device);
device->unref(); // was created with refcount 1, and setDevice also refs
}
CGContextRef PlatformCanvasMac::beginPlatformPaint() {
return getTopPlatformDevice().GetBitmapContext();
}
void PlatformCanvasMac::endPlatformPaint() {
// flushing will be done in onAccessBitmap
}
PlatformDeviceMac& PlatformCanvasMac::getTopPlatformDevice() const {
// All of our devices should be our special PlatformDeviceMac.
SkCanvas::LayerIter iter(const_cast<PlatformCanvasMac*>(this), false);
return *static_cast<PlatformDeviceMac*>(iter.device());
}
// Clipping -------------------------------------------------------------------
bool PlatformCanvasMac::clipRect(const SkRect& rect, SkRegion::Op op) {
bool ret = SkCanvas::clipRect(rect, op);
getTopPlatformDevice().SetClipRegion(getTotalClip());
return ret;
}
bool PlatformCanvasMac::clipPath(const SkPath& path, SkRegion::Op op) {
bool ret = SkCanvas::clipPath(path, op);
getTopPlatformDevice().SetClipRegion(getTotalClip());
return ret;
}
bool PlatformCanvasMac::clipRegion(const SkRegion& deviceRgn, SkRegion::Op op) {
bool ret = SkCanvas::clipRegion(deviceRgn, op);
getTopPlatformDevice().SetClipRegion(getTotalClip());
return ret;
}
// Transforming ---------------------------------------------------------------
bool PlatformCanvasMac::translate(SkScalar dx, SkScalar dy) {
if (!SkCanvas::translate(dx, dy))
return false;
getTopPlatformDevice().SetTransform(getTotalMatrix());
return true;
}
bool PlatformCanvasMac::scale(SkScalar sx, SkScalar sy) {
if (!SkCanvas::scale(sx, sy))
return false;
getTopPlatformDevice().SetTransform(getTotalMatrix());
return true;
}
int PlatformCanvasMac::saveLayer(const SkRect* bounds,
const SkPaint* paint,
SaveFlags flags) {
int result = SkCanvas::saveLayer(bounds, paint, flags);
// saveLayer will have created a new device which, depending on the clip
// rect, may be smaller than the original layer. Therefore, it will have a
// transform applied, and we need to sync CG with that transform.
SkCanvas::LayerIter iter(this, false);
PlatformDeviceMac& new_device =
*static_cast<PlatformDeviceMac*>(iter.device());
// There man not actually be a new layer if the layer is empty.
if (!iter.done()) {
new_device.SetDeviceOffset(iter.x(), iter.y());
new_device.SetTransform(getTotalMatrix());
new_device.SetClipRegion(getTotalClip());
}
return result;
}
int PlatformCanvasMac::save(SkCanvas::SaveFlags flags) {
int ret = SkCanvas::save(flags);
PlatformDeviceMac& device = getTopPlatformDevice();
device.SetTransform(getTotalMatrix());
device.SetClipRegion(getTotalClip());
return ret;
}
void PlatformCanvasMac::restore() {
SkCanvas::restore();
PlatformDeviceMac& device = getTopPlatformDevice();
device.SetTransform(getTotalMatrix());
device.SetClipRegion(getTotalClip());
}
SkDevice* PlatformCanvasMac::createDevice(SkBitmap::Config config,
int width,
int height,
bool is_opaque) {
DCHECK(config == SkBitmap::kARGB_8888_Config);
return createPlatformDevice(width, height, is_opaque, NULL);
}
SkDevice* PlatformCanvasMac::createPlatformDevice(int width,
int height,
bool is_opaque,
CGContextRef context) {
SkDevice* device = BitmapPlatformDeviceMac::Create(context, width, height,
is_opaque);
return device;
}
} // namespace gfx
|
