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
|
/*
* 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 "SkOffsetImageFilter.h"
#include "SkCanvas.h"
#include "SkMatrix.h"
#include "SkPaint.h"
#include "SkReadBuffer.h"
#include "SkSpecialImage.h"
#include "SkSpecialSurface.h"
#include "SkWriteBuffer.h"
sk_sp<SkImageFilter> SkOffsetImageFilter::Make(SkScalar dx, SkScalar dy,
sk_sp<SkImageFilter> input,
const CropRect* cropRect) {
if (!SkScalarIsFinite(dx) || !SkScalarIsFinite(dy)) {
return nullptr;
}
return sk_sp<SkImageFilter>(new SkOffsetImageFilter(dx, dy, std::move(input), cropRect));
}
sk_sp<SkSpecialImage> SkOffsetImageFilter::onFilterImage(SkSpecialImage* source,
const Context& ctx,
SkIPoint* offset) const {
SkIPoint srcOffset = SkIPoint::Make(0, 0);
sk_sp<SkSpecialImage> input(this->filterInput(0, source, ctx, &srcOffset));
if (!input) {
return nullptr;
}
SkVector vec;
ctx.ctm().mapVectors(&vec, &fOffset, 1);
if (!this->cropRectIsSet()) {
offset->fX = srcOffset.fX + SkScalarRoundToInt(vec.fX);
offset->fY = srcOffset.fY + SkScalarRoundToInt(vec.fY);
return input;
} else {
SkIRect bounds;
SkIRect srcBounds = SkIRect::MakeWH(input->width(), input->height());
srcBounds.offset(srcOffset);
if (!this->applyCropRect(ctx, srcBounds, &bounds)) {
return nullptr;
}
sk_sp<SkSpecialSurface> surf(source->makeSurface(ctx.outputProperties(), bounds.size()));
if (!surf) {
return nullptr;
}
SkCanvas* canvas = surf->getCanvas();
SkASSERT(canvas);
// TODO: it seems like this clear shouldn't be necessary (see skbug.com/5075)
canvas->clear(0x0);
SkPaint paint;
paint.setBlendMode(SkBlendMode::kSrc);
canvas->translate(SkIntToScalar(srcOffset.fX - bounds.fLeft),
SkIntToScalar(srcOffset.fY - bounds.fTop));
input->draw(canvas, vec.x(), vec.y(), &paint);
offset->fX = bounds.fLeft;
offset->fY = bounds.fTop;
return surf->makeImageSnapshot();
}
}
sk_sp<SkImageFilter> SkOffsetImageFilter::onMakeColorSpace(SkColorSpaceXformer* xformer) const {
SkASSERT(1 == this->countInputs());
if (!this->getInput(0)) {
return sk_ref_sp(const_cast<SkOffsetImageFilter*>(this));
}
sk_sp<SkImageFilter> input = this->getInput(0)->makeColorSpace(xformer);
return SkOffsetImageFilter::Make(fOffset.fX, fOffset.fY, std::move(input),
this->getCropRectIfSet());
}
SkRect SkOffsetImageFilter::computeFastBounds(const SkRect& src) const {
SkRect bounds = this->getInput(0) ? this->getInput(0)->computeFastBounds(src) : src;
bounds.offset(fOffset.fX, fOffset.fY);
return bounds;
}
SkIRect SkOffsetImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm,
MapDirection direction) const {
SkVector vec;
ctm.mapVectors(&vec, &fOffset, 1);
if (kReverse_MapDirection == direction) {
vec.negate();
}
return src.makeOffset(SkScalarCeilToInt(vec.fX), SkScalarCeilToInt(vec.fY));
}
sk_sp<SkFlattenable> SkOffsetImageFilter::CreateProc(SkReadBuffer& buffer) {
SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
SkPoint offset;
buffer.readPoint(&offset);
return Make(offset.x(), offset.y(), common.getInput(0), &common.cropRect());
}
void SkOffsetImageFilter::flatten(SkWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
buffer.writePoint(fOffset);
}
SkOffsetImageFilter::SkOffsetImageFilter(SkScalar dx, SkScalar dy,
sk_sp<SkImageFilter> input,
const CropRect* cropRect)
: INHERITED(&input, 1, cropRect) {
fOffset.set(dx, dy);
}
#ifndef SK_IGNORE_TO_STRING
void SkOffsetImageFilter::toString(SkString* str) const {
str->appendf("SkOffsetImageFilter: (");
str->appendf("offset: (%f, %f) ", fOffset.fX, fOffset.fY);
str->append("input: (");
if (this->getInput(0)) {
this->getInput(0)->toString(str);
}
str->append("))");
}
#endif
|
