1 /*
2 * Copyright 2016 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "SkPaintImageFilter.h"
9 #include "SkCanvas.h"
10 #include "SkColorSpaceXformer.h"
11 #include "SkImageFilterPriv.h"
12 #include "SkReadBuffer.h"
13 #include "SkSpecialImage.h"
14 #include "SkSpecialSurface.h"
15 #include "SkWriteBuffer.h"
16
Make(const SkPaint & paint,const CropRect * cropRect)17 sk_sp<SkImageFilter> SkPaintImageFilter::Make(const SkPaint& paint,
18 const CropRect* cropRect) {
19 return sk_sp<SkImageFilter>(new SkPaintImageFilter(paint, cropRect));
20 }
21
SkPaintImageFilter(const SkPaint & paint,const CropRect * cropRect)22 SkPaintImageFilter::SkPaintImageFilter(const SkPaint& paint, const CropRect* cropRect)
23 : INHERITED(nullptr, 0, cropRect)
24 , fPaint(paint) {
25 }
26
CreateProc(SkReadBuffer & buffer)27 sk_sp<SkFlattenable> SkPaintImageFilter::CreateProc(SkReadBuffer& buffer) {
28 SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0);
29 SkPaint paint;
30 buffer.readPaint(&paint);
31 return SkPaintImageFilter::Make(paint, &common.cropRect());
32 }
33
flatten(SkWriteBuffer & buffer) const34 void SkPaintImageFilter::flatten(SkWriteBuffer& buffer) const {
35 this->INHERITED::flatten(buffer);
36 buffer.writePaint(fPaint);
37 }
38
onFilterImage(SkSpecialImage * source,const Context & ctx,SkIPoint * offset) const39 sk_sp<SkSpecialImage> SkPaintImageFilter::onFilterImage(SkSpecialImage* source,
40 const Context& ctx,
41 SkIPoint* offset) const {
42 SkIRect bounds;
43 const SkIRect srcBounds = SkIRect::MakeWH(source->width(), source->height());
44 if (!this->applyCropRect(ctx, srcBounds, &bounds)) {
45 return nullptr;
46 }
47
48 sk_sp<SkSpecialSurface> surf(source->makeSurface(ctx.outputProperties(), bounds.size()));
49 if (!surf) {
50 return nullptr;
51 }
52
53 SkCanvas* canvas = surf->getCanvas();
54 SkASSERT(canvas);
55
56 canvas->clear(0x0);
57
58 SkMatrix matrix(ctx.ctm());
59 matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
60 SkRect rect = SkRect::MakeIWH(bounds.width(), bounds.height());
61 SkMatrix inverse;
62 if (matrix.invert(&inverse)) {
63 inverse.mapRect(&rect);
64 }
65 canvas->setMatrix(matrix);
66 canvas->drawRect(rect, fPaint);
67
68 offset->fX = bounds.fLeft;
69 offset->fY = bounds.fTop;
70 return surf->makeImageSnapshot();
71 }
72
onMakeColorSpace(SkColorSpaceXformer * xformer) const73 sk_sp<SkImageFilter> SkPaintImageFilter::onMakeColorSpace(SkColorSpaceXformer* xformer) const {
74 SkPaint paint = xformer->apply(fPaint);
75 if (paint != fPaint) {
76 return SkPaintImageFilter::Make(paint, this->getCropRectIfSet());
77 }
78 return this->refMe();
79 }
80
affectsTransparentBlack() const81 bool SkPaintImageFilter::affectsTransparentBlack() const {
82 return true;
83 }
84
85 #ifndef SK_IGNORE_TO_STRING
toString(SkString * str) const86 void SkPaintImageFilter::toString(SkString* str) const {
87 str->appendf("SkPaintImageFilter: (");
88 fPaint.toString(str);
89 str->append(")");
90 }
91 #endif
92