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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
/*
* Copyright 2013 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 "SkXfermodeImageFilter.h"
#include "SkCanvas.h"
#include "SkDevice.h"
#include "SkColorPriv.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
#include "SkXfermode.h"
#if SK_SUPPORT_GPU
#include "GrContext.h"
#include "GrDrawContext.h"
#include "effects/GrConstColorProcessor.h"
#include "effects/GrTextureDomain.h"
#include "effects/GrSimpleTextureEffect.h"
#include "SkGr.h"
#endif
///////////////////////////////////////////////////////////////////////////////
sk_sp<SkImageFilter> SkXfermodeImageFilter::Make(sk_sp<SkXfermode> mode, SkImageFilter* background,
SkImageFilter* foreground,
const CropRect* cropRect) {
SkImageFilter* inputs[2] = { background, foreground };
return sk_sp<SkImageFilter>(new SkXfermodeImageFilter(mode, inputs, cropRect));
}
SkXfermodeImageFilter::SkXfermodeImageFilter(sk_sp<SkXfermode> mode,
SkImageFilter* inputs[2],
const CropRect* cropRect)
: INHERITED(2, inputs, cropRect)
, fMode(std::move(mode))
{}
SkFlattenable* SkXfermodeImageFilter::CreateProc(SkReadBuffer& buffer) {
SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 2);
sk_sp<SkXfermode> mode(buffer.readXfermode());
return Make(std::move(mode), common.getInput(0),
common.getInput(1), &common.cropRect()).release();
}
void SkXfermodeImageFilter::flatten(SkWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
buffer.writeFlattenable(fMode.get());
}
bool SkXfermodeImageFilter::onFilterImageDeprecated(Proxy* proxy,
const SkBitmap& src,
const Context& ctx,
SkBitmap* dst,
SkIPoint* offset) const {
SkBitmap background = src, foreground = src;
SkIPoint backgroundOffset = SkIPoint::Make(0, 0);
if (!this->filterInputDeprecated(0, proxy, src, ctx, &background, &backgroundOffset)) {
background.reset();
}
SkIPoint foregroundOffset = SkIPoint::Make(0, 0);
if (!this->filterInputDeprecated(1, proxy, src, ctx, &foreground, &foregroundOffset)) {
foreground.reset();
}
SkIRect bounds, foregroundBounds;
SkIRect foregroundSrcBounds = foreground.bounds();
foregroundSrcBounds.offset(foregroundOffset);
if (!applyCropRect(ctx, foregroundSrcBounds, &foregroundBounds)) {
foregroundBounds.setEmpty();
foreground.reset();
}
SkIRect backgroundSrcBounds = background.bounds();
backgroundSrcBounds.offset(backgroundOffset);
if (!applyCropRect(ctx, backgroundSrcBounds, &bounds)) {
bounds.setEmpty();
background.reset();
}
bounds.join(foregroundBounds);
if (bounds.isEmpty()) {
return false;
}
SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
if (nullptr == device.get()) {
return false;
}
SkCanvas canvas(device);
canvas.translate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
SkPaint paint;
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
canvas.drawBitmap(background, SkIntToScalar(backgroundOffset.fX),
SkIntToScalar(backgroundOffset.fY), &paint);
paint.setXfermode(fMode);
canvas.drawBitmap(foreground, SkIntToScalar(foregroundOffset.fX),
SkIntToScalar(foregroundOffset.fY), &paint);
canvas.clipRect(SkRect::Make(foregroundBounds), SkRegion::kDifference_Op);
paint.setColor(SK_ColorTRANSPARENT);
canvas.drawPaint(paint);
*dst = device->accessBitmap(false);
offset->fX = bounds.left();
offset->fY = bounds.top();
return true;
}
#ifndef SK_IGNORE_TO_STRING
void SkXfermodeImageFilter::toString(SkString* str) const {
str->appendf("SkXfermodeImageFilter: (");
str->appendf("xfermode: (");
if (fMode) {
fMode->toString(str);
}
str->append(")");
if (this->getInput(0)) {
str->appendf("foreground: (");
this->getInput(0)->toString(str);
str->appendf(")");
}
if (this->getInput(1)) {
str->appendf("background: (");
this->getInput(1)->toString(str);
str->appendf(")");
}
str->append(")");
}
#endif
#if SK_SUPPORT_GPU
bool SkXfermodeImageFilter::canFilterImageGPU() const {
return !this->cropRectIsSet();
}
#include "SkXfermode_proccoeff.h"
bool SkXfermodeImageFilter::filterImageGPUDeprecated(Proxy* proxy,
const SkBitmap& src,
const Context& ctx,
SkBitmap* result,
SkIPoint* offset) const {
GrContext* context = nullptr;
SkBitmap background = src;
SkIPoint backgroundOffset = SkIPoint::Make(0, 0);
if (!this->filterInputGPUDeprecated(0, proxy, src, ctx, &background, &backgroundOffset)) {
background.reset();
}
GrTexture* backgroundTex = background.getTexture();
if (backgroundTex) {
context = backgroundTex->getContext();
}
SkBitmap foreground = src;
SkIPoint foregroundOffset = SkIPoint::Make(0, 0);
if (!this->filterInputGPUDeprecated(1, proxy, src, ctx, &foreground, &foregroundOffset)) {
foreground.reset();
}
GrTexture* foregroundTex = foreground.getTexture();
if (foregroundTex) {
context = foregroundTex->getContext();
}
if (!context) {
return false;
}
SkIRect bounds = background.bounds().makeOffset(backgroundOffset.x(), backgroundOffset.y());
bounds.join(foreground.bounds().makeOffset(foregroundOffset.x(), foregroundOffset.y()));
if (bounds.isEmpty()) {
return false;
}
GrSurfaceDesc desc;
desc.fFlags = kRenderTarget_GrSurfaceFlag;
desc.fWidth = bounds.width();
desc.fHeight = bounds.height();
desc.fConfig = kSkia8888_GrPixelConfig;
SkAutoTUnref<GrTexture> dst(context->textureProvider()->createApproxTexture(desc));
if (!dst) {
return false;
}
GrPaint paint;
SkAutoTUnref<const GrFragmentProcessor> bgFP;
if (backgroundTex) {
SkMatrix backgroundMatrix;
backgroundMatrix.setIDiv(backgroundTex->width(), backgroundTex->height());
backgroundMatrix.preTranslate(SkIntToScalar(-backgroundOffset.fX),
SkIntToScalar(-backgroundOffset.fY));
bgFP.reset(GrTextureDomainEffect::Create(
backgroundTex, backgroundMatrix,
GrTextureDomain::MakeTexelDomain(backgroundTex, background.bounds()),
GrTextureDomain::kDecal_Mode,
GrTextureParams::kNone_FilterMode));
} else {
bgFP.reset(GrConstColorProcessor::Create(GrColor_TRANSPARENT_BLACK,
GrConstColorProcessor::kIgnore_InputMode));
}
if (foregroundTex) {
SkMatrix foregroundMatrix;
foregroundMatrix.setIDiv(foregroundTex->width(), foregroundTex->height());
foregroundMatrix.preTranslate(SkIntToScalar(-foregroundOffset.fX),
SkIntToScalar(-foregroundOffset.fY));
SkAutoTUnref<const GrFragmentProcessor> foregroundFP;
foregroundFP.reset(GrTextureDomainEffect::Create(
foregroundTex, foregroundMatrix,
GrTextureDomain::MakeTexelDomain(foregroundTex, foreground.bounds()),
GrTextureDomain::kDecal_Mode,
GrTextureParams::kNone_FilterMode));
paint.addColorFragmentProcessor(foregroundFP.get());
// A null fMode is interpreted to mean kSrcOver_Mode (to match raster).
SkAutoTUnref<SkXfermode> mode(SkSafeRef(fMode.get()));
if (!mode) {
// It would be awesome to use SkXfermode::Create here but it knows better
// than us and won't return a kSrcOver_Mode SkXfermode. That means we
// have to get one the hard way.
struct ProcCoeff rec;
rec.fProc = SkXfermode::GetProc(SkXfermode::kSrcOver_Mode);
SkXfermode::ModeAsCoeff(SkXfermode::kSrcOver_Mode, &rec.fSC, &rec.fDC);
mode.reset(new SkProcCoeffXfermode(rec, SkXfermode::kSrcOver_Mode));
}
SkAutoTUnref<const GrFragmentProcessor> xferFP(mode->getFragmentProcessorForImageFilter(bgFP));
// A null 'xferFP' here means kSrc_Mode was used in which case we can just proceed
if (xferFP) {
paint.addColorFragmentProcessor(xferFP);
}
} else {
paint.addColorFragmentProcessor(bgFP);
}
paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
SkAutoTUnref<GrDrawContext> drawContext(context->drawContext(dst->asRenderTarget()));
if (!drawContext) {
return false;
}
SkMatrix matrix;
matrix.setTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
drawContext->drawRect(GrClip::WideOpen(), paint, matrix, SkRect::Make(bounds));
offset->fX = bounds.left();
offset->fY = bounds.top();
GrWrapTextureInBitmap(dst, bounds.width(), bounds.height(), false, result);
return true;
}
#endif
|
