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
170
171
172
173
174
175
176
177
178
|
/*
* 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 "SkReadBuffer.h"
#include "SkSpecialImage.h"
#include "SkSpecialSurface.h"
#include "SkWriteBuffer.h"
#include "SkValidationUtils.h"
///////////////////////////////////////////////////////////////////////////////
void SkMergeImageFilter::initAllocModes() {
int inputCount = this->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 = nullptr;
}
}
void SkMergeImageFilter::initModes(const SkXfermode::Mode modes[]) {
if (modes) {
this->initAllocModes();
int inputCount = this->countInputs();
for (int i = 0; i < inputCount; ++i) {
fModes[i] = SkToU8(modes[i]);
}
} else {
fModes = nullptr;
}
}
SkMergeImageFilter::SkMergeImageFilter(SkImageFilter* filters[], int count,
const SkXfermode::Mode modes[],
const CropRect* cropRect)
: INHERITED(count, filters, cropRect) {
SkASSERT(count >= 0);
this->initModes(modes);
}
SkMergeImageFilter::~SkMergeImageFilter() {
if (fModes != SkTCast<uint8_t*>(fStorage)) {
sk_free(fModes);
}
}
sk_sp<SkSpecialImage> SkMergeImageFilter::onFilterImage(SkSpecialImage* source, const Context& ctx,
SkIPoint* offset) const {
int inputCount = this->countInputs();
if (inputCount < 1) {
return nullptr;
}
SkIRect bounds;
bounds.setEmpty();
SkAutoTDeleteArray<sk_sp<SkSpecialImage>> inputs(new sk_sp<SkSpecialImage>[inputCount]);
SkAutoTDeleteArray<SkIPoint> offsets(new SkIPoint[inputCount]);
// Filter all of the inputs.
for (int i = 0; i < inputCount; ++i) {
offsets[i].setZero();
inputs[i] = this->filterInput(i, source, ctx, &offsets[i]);
if (!inputs[i]) {
continue;
}
const SkIRect inputBounds = SkIRect::MakeXYWH(offsets[i].fX, offsets[i].fY,
inputs[i]->width(), inputs[i]->height());
bounds.join(inputBounds);
}
if (bounds.isEmpty()) {
return nullptr;
}
// Apply the crop rect to the union of the inputs' bounds.
this->getCropRect().applyTo(bounds, ctx.ctm(), &bounds);
if (!bounds.intersect(ctx.clipBounds())) {
return nullptr;
}
const int x0 = bounds.left();
const int y0 = bounds.top();
SkImageInfo info = SkImageInfo::MakeN32(bounds.width(), bounds.height(),
kPremul_SkAlphaType);
sk_sp<SkSpecialSurface> surf(source->makeSurface(info));
if (!surf) {
return nullptr;
}
SkCanvas* canvas = surf->getCanvas();
SkASSERT(canvas);
canvas->clear(0x0);
// Composite all of the filter inputs.
for (int i = 0; i < inputCount; ++i) {
if (!inputs[i]) {
continue;
}
SkPaint paint;
if (fModes) {
paint.setXfermodeMode((SkXfermode::Mode)fModes[i]);
}
inputs[i]->draw(canvas,
SkIntToScalar(offsets[i].x() - x0), SkIntToScalar(offsets[i].y() - y0),
&paint);
}
offset->fX = bounds.left();
offset->fY = bounds.top();
return surf->makeImageSnapshot();
}
SkFlattenable* SkMergeImageFilter::CreateProc(SkReadBuffer& buffer) {
Common common;
if (!common.unflatten(buffer, -1)) {
return nullptr;
}
const int count = common.inputCount();
bool hasModes = buffer.readBool();
if (hasModes) {
SkAutoSTArray<4, SkXfermode::Mode> modes(count);
SkAutoSTArray<4, uint8_t> modes8(count);
if (!buffer.readByteArray(modes8.get(), count)) {
return nullptr;
}
for (int i = 0; i < count; ++i) {
modes[i] = (SkXfermode::Mode)modes8[i];
buffer.validate(SkIsValidMode(modes[i]));
}
if (!buffer.isValid()) {
return nullptr;
}
return Create(common.inputs(), count, modes.get(), &common.cropRect());
}
return Create(common.inputs(), count, nullptr, &common.cropRect());
}
void SkMergeImageFilter::flatten(SkWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
buffer.writeBool(fModes != nullptr);
if (fModes) {
buffer.writeByteArray(fModes, this->countInputs() * sizeof(fModes[0]));
}
}
#ifndef SK_IGNORE_TO_STRING
void SkMergeImageFilter::toString(SkString* str) const {
str->appendf("SkMergeImageFilter: (");
for (int i = 0; i < this->countInputs(); ++i) {
SkImageFilter* filter = this->getInput(i);
str->appendf("%d: (", i);
filter->toString(str);
str->appendf(")");
}
str->append(")");
}
#endif
|
