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
|
/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkTileImageFilter.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkDevice.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
#include "SkMatrix.h"
#include "SkPaint.h"
#include "SkShader.h"
#include "SkValidationUtils.h"
SkTileImageFilter* SkTileImageFilter::Create(const SkRect& srcRect, const SkRect& dstRect,
SkImageFilter* input) {
if (!SkIsValidRect(srcRect) || !SkIsValidRect(dstRect)) {
return NULL;
}
return SkNEW_ARGS(SkTileImageFilter, (srcRect, dstRect, input));
}
bool SkTileImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src,
const Context& ctx,
SkBitmap* dst, SkIPoint* offset) const {
SkRect dstRect;
ctx.ctm().mapRect(&dstRect, fDstRect);
const SkIRect dstIRect = dstRect.roundOut();
if (fSrcRect.isEmpty() || dstIRect.isEmpty()) {
return false;
}
// TODO: the actual clip that needs to be applied to the src should be (roughly) determined by:
// intersect ctx.clip and dstIRect
// determine if that rect lies wholly inside fSrcRect
// if so pass it on as the clip
// if not pass the entire fSrcRect as the clip
// For now don't apply any clip to the source (since it is usually very small and all of it
// will be required anyway).
Context srcCtx(ctx.ctm(), SkIRect::MakeLargest(), ctx.cache());
SkBitmap source = src;
SkImageFilter* input = this->getInput(0);
SkIPoint srcOffset = SkIPoint::Make(0, 0);
if (input && !input->filterImage(proxy, src, srcCtx, &source, &srcOffset)) {
return false;
}
SkRect srcRect;
ctx.ctm().mapRect(&srcRect, fSrcRect);
SkIRect srcIRect;
srcRect.roundOut(&srcIRect);
srcIRect.offset(-srcOffset);
SkBitmap subset;
SkIRect bounds;
source.getBounds(&bounds);
if (!srcIRect.intersect(bounds)) {
offset->fX = offset->fY = 0;
return true;
} else if (!source.extractSubset(&subset, srcIRect)) {
return false;
}
SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(dstIRect.width(), dstIRect.height()));
if (NULL == device.get()) {
return false;
}
SkCanvas canvas(device);
SkPaint paint;
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
SkMatrix shaderMatrix;
shaderMatrix.setTranslate(SkIntToScalar(srcOffset.fX),
SkIntToScalar(srcOffset.fY));
SkAutoTUnref<SkShader> shader(SkShader::CreateBitmapShader(subset,
SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode,
&shaderMatrix));
paint.setShader(shader);
canvas.translate(-dstRect.fLeft, -dstRect.fTop);
canvas.drawRect(dstRect, paint);
*dst = device->accessBitmap(false);
offset->fX = dstIRect.fLeft;
offset->fY = dstIRect.fTop;
return true;
}
bool SkTileImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
SkIRect* dst) const {
SkRect srcRect;
ctm.mapRect(&srcRect, fSrcRect);
SkIRect srcIRect;
srcRect.roundOut(&srcIRect);
srcIRect.join(src);
*dst = srcIRect;
return true;
}
void SkTileImageFilter::computeFastBounds(const SkRect& src, SkRect* dst) const {
// This is a workaround for skia:3194.
*dst = src;
dst->join(fDstRect);
}
SkFlattenable* SkTileImageFilter::CreateProc(SkReadBuffer& buffer) {
SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
SkRect src, dst;
buffer.readRect(&src);
buffer.readRect(&dst);
return Create(src, dst, common.getInput(0));
}
void SkTileImageFilter::flatten(SkWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
buffer.writeRect(fSrcRect);
buffer.writeRect(fDstRect);
}
#ifndef SK_IGNORE_TO_STRING
void SkTileImageFilter::toString(SkString* str) const {
str->appendf("SkTileImageFilter: (");
this->getCropRect().toString(str);
str->appendf("src: %.2f %.2f %.2f %.2f",
fSrcRect.fLeft, fSrcRect.fTop, fSrcRect.fRight, fSrcRect.fBottom);
str->appendf(" dst: %.2f %.2f %.2f %.2f",
fDstRect.fLeft, fDstRect.fTop, fDstRect.fRight, fDstRect.fBottom);
if (this->getInput(0)) {
str->appendf(" input: (");
this->getInput(0)->toString(str);
str->appendf(")");
}
str->append(")");
}
#endif
|
