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
|
/*
* Copyright 2012 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.
*/
#include "SkMergeImageFilter.h"
#include "SkCanvas.h"
#include "SkDevice.h"
#include "SkFlattenableBuffers.h"
///////////////////////////////////////////////////////////////////////////////
void SkMergeImageFilter::initAllocModes() {
int inputCount = countInputs();
if (inputCount) {
size_t size = sizeof(uint8_t) * inputCount;
if (size <= sizeof(fStorage)) {
fModes = SkTCast<uint8_t*>(fStorage);
} else {
fModes = SkTCast<uint8_t*>(sk_malloc_throw(size));
}
} else {
fModes = NULL;
}
}
void SkMergeImageFilter::initModes(const SkXfermode::Mode modes[]) {
if (modes) {
this->initAllocModes();
int inputCount = countInputs();
for (int i = 0; i < inputCount; ++i) {
fModes[i] = SkToU8(modes[i]);
}
} else {
fModes = NULL;
}
}
SkMergeImageFilter::SkMergeImageFilter(SkImageFilter* first, SkImageFilter* second,
SkXfermode::Mode mode,
const SkIRect* cropRect) : INHERITED(first, second, cropRect) {
if (SkXfermode::kSrcOver_Mode != mode) {
SkXfermode::Mode modes[] = { mode, mode };
this->initModes(modes);
} else {
fModes = NULL;
}
}
SkMergeImageFilter::SkMergeImageFilter(SkImageFilter* filters[], int count,
const SkXfermode::Mode modes[],
const SkIRect* cropRect) : INHERITED(count, filters, cropRect) {
this->initModes(modes);
}
SkMergeImageFilter::~SkMergeImageFilter() {
if (fModes != SkTCast<uint8_t*>(fStorage)) {
sk_free(fModes);
}
}
bool SkMergeImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
SkIRect* dst) {
if (countInputs() < 1) {
return false;
}
SkIRect totalBounds;
int inputCount = countInputs();
for (int i = 0; i < inputCount; ++i) {
SkImageFilter* filter = getInput(i);
SkIRect r;
if (filter) {
if (!filter->filterBounds(src, ctm, &r)) {
return false;
}
} else {
r = src;
}
if (0 == i) {
totalBounds = r;
} else {
totalBounds.join(r);
}
}
// don't modify dst until now, so we don't accidentally change it in the
// loop, but then return false on the next filter.
*dst = totalBounds;
return true;
}
bool SkMergeImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src,
const SkMatrix& ctm,
SkBitmap* result, SkIPoint* loc) {
if (countInputs() < 1) {
return false;
}
SkIRect bounds;
src.getBounds(&bounds);
if (!this->applyCropRect(&bounds, ctm)) {
return false;
}
const int x0 = bounds.left();
const int y0 = bounds.top();
SkAutoTUnref<SkBaseDevice> dst(proxy->createDevice(bounds.width(), bounds.height()));
if (NULL == dst) {
return false;
}
SkCanvas canvas(dst);
SkPaint paint;
int inputCount = countInputs();
for (int i = 0; i < inputCount; ++i) {
SkBitmap tmp;
const SkBitmap* srcPtr;
SkIPoint pos = SkIPoint::Make(0, 0);
SkImageFilter* filter = getInput(i);
if (filter) {
if (!filter->filterImage(proxy, src, ctm, &tmp, &pos)) {
return false;
}
srcPtr = &tmp;
} else {
srcPtr = &src;
}
if (fModes) {
paint.setXfermodeMode((SkXfermode::Mode)fModes[i]);
} else {
paint.setXfermode(NULL);
}
canvas.drawSprite(*srcPtr, pos.x() - x0, pos.y() - y0, &paint);
}
loc->fX += bounds.left();
loc->fY += bounds.top();
*result = dst->accessBitmap(false);
return true;
}
void SkMergeImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
buffer.writeBool(fModes != NULL);
if (fModes) {
buffer.writeByteArray(fModes, countInputs() * sizeof(fModes[0]));
}
}
SkMergeImageFilter::SkMergeImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) {
bool hasModes = buffer.readBool();
if (hasModes) {
this->initAllocModes();
SkASSERT(buffer.getArrayCount() == countInputs() * sizeof(fModes[0]));
buffer.readByteArray(fModes);
} else {
fModes = 0;
}
}
|
