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 "SkReadBuffer.h"
11 #include "SkSpecialImage.h"
12 #include "SkSpecialSurface.h"
13 #include "SkWriteBuffer.h"
14
Make(const SkPaint & paint,const CropRect * cropRect)15 sk_sp<SkImageFilter> SkPaintImageFilter::Make(const SkPaint& paint,
16 const CropRect* cropRect) {
17 return sk_sp<SkImageFilter>(new SkPaintImageFilter(paint, cropRect));
18 }
19
SkPaintImageFilter(const SkPaint & paint,const CropRect * cropRect)20 SkPaintImageFilter::SkPaintImageFilter(const SkPaint& paint, const CropRect* cropRect)
21 : INHERITED(nullptr, 0, cropRect)
22 , fPaint(paint) {
23 }
24
CreateProc(SkReadBuffer & buffer)25 sk_sp<SkFlattenable> SkPaintImageFilter::CreateProc(SkReadBuffer& buffer) {
26 SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0);
27 SkPaint paint;
28 buffer.readPaint(&paint);
29 return SkPaintImageFilter::Make(paint, &common.cropRect());
30 }
31
flatten(SkWriteBuffer & buffer) const32 void SkPaintImageFilter::flatten(SkWriteBuffer& buffer) const {
33 this->INHERITED::flatten(buffer);
34 buffer.writePaint(fPaint);
35 }
36
onFilterImage(SkSpecialImage * source,const Context & ctx,SkIPoint * offset) const37 sk_sp<SkSpecialImage> SkPaintImageFilter::onFilterImage(SkSpecialImage* source,
38 const Context& ctx,
39 SkIPoint* offset) const {
40 SkIRect bounds;
41 const SkIRect srcBounds = SkIRect::MakeWH(source->width(), source->height());
42 if (!this->applyCropRect(ctx, srcBounds, &bounds)) {
43 return nullptr;
44 }
45
46 sk_sp<SkSpecialSurface> surf(source->makeSurface(ctx.outputProperties(), bounds.size()));
47 if (!surf) {
48 return nullptr;
49 }
50
51 SkCanvas* canvas = surf->getCanvas();
52 SkASSERT(canvas);
53
54 canvas->clear(0x0);
55
56 SkMatrix matrix(ctx.ctm());
57 matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
58 SkRect rect = SkRect::MakeIWH(bounds.width(), bounds.height());
59 SkMatrix inverse;
60 if (matrix.invert(&inverse)) {
61 inverse.mapRect(&rect);
62 }
63 canvas->setMatrix(matrix);
64 canvas->drawRect(rect, fPaint);
65
66 offset->fX = bounds.fLeft;
67 offset->fY = bounds.fTop;
68 return surf->makeImageSnapshot();
69 }
70
affectsTransparentBlack() const71 bool SkPaintImageFilter::affectsTransparentBlack() const {
72 return true;
73 }
74
75 #ifndef SK_IGNORE_TO_STRING
toString(SkString * str) const76 void SkPaintImageFilter::toString(SkString* str) const {
77 str->appendf("SkPaintImageFilter: (");
78 fPaint.toString(str);
79 str->append(")");
80 }
81 #endif
82