1 /*
2 * Copyright 2015 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 "gm/gm.h"
9 #include "include/core/SkCanvas.h"
10 #include "include/core/SkColor.h"
11 #include "include/core/SkImage.h"
12 #include "include/core/SkImageFilter.h"
13 #include "include/core/SkMatrix.h"
14 #include "include/core/SkPaint.h"
15 #include "include/core/SkRect.h"
16 #include "include/core/SkRefCnt.h"
17 #include "include/core/SkScalar.h"
18 #include "include/core/SkSize.h"
19 #include "include/core/SkString.h"
20 #include "include/core/SkSurface.h"
21 #include "include/effects/SkImageFilters.h"
22
23 #include <utility>
24
create_circle_texture(int size,SkColor color)25 static sk_sp<SkImage> create_circle_texture(int size, SkColor color) {
26 auto surface(SkSurface::MakeRasterN32Premul(size, size));
27 SkCanvas* canvas = surface->getCanvas();
28 canvas->clear(0xFF000000);
29
30 SkPaint paint;
31 paint.setColor(color);
32 paint.setStrokeWidth(3);
33 paint.setStyle(SkPaint::kStroke_Style);
34
35 canvas->drawCircle(SkScalarHalf(size), SkScalarHalf(size), SkScalarHalf(size), paint);
36
37 return surface->makeImageSnapshot();
38 }
39
40 namespace skiagm {
41
42 class BigTileImageFilterGM : public GM {
43 public:
BigTileImageFilterGM()44 BigTileImageFilterGM() {
45 this->setBGColor(0xFF000000);
46 }
47
48 protected:
49
onShortName()50 SkString onShortName() override {
51 return SkString("bigtileimagefilter");
52 }
53
onISize()54 SkISize onISize() override {
55 return SkISize::Make(kWidth, kHeight);
56 }
57
onOnceBeforeDraw()58 void onOnceBeforeDraw() override {
59 fRedImage = create_circle_texture(kBitmapSize, SK_ColorRED);
60 fGreenImage = create_circle_texture(kBitmapSize, SK_ColorGREEN);
61 }
62
onDraw(SkCanvas * canvas)63 void onDraw(SkCanvas* canvas) override {
64 canvas->clear(SK_ColorBLACK);
65
66 {
67 SkPaint p;
68
69 const SkRect bound = SkRect::MakeIWH(kWidth, kHeight);
70 sk_sp<SkImageFilter> imageSource(SkImageFilters::Image(fRedImage));
71
72 sk_sp<SkImageFilter> tif(SkImageFilters::Tile(
73 SkRect::MakeIWH(kBitmapSize, kBitmapSize), SkRect::MakeIWH(kWidth, kHeight),
74 std::move(imageSource)));
75
76 p.setImageFilter(std::move(tif));
77
78 canvas->saveLayer(&bound, &p);
79 canvas->restore();
80 }
81
82 {
83 SkPaint p2;
84
85 const SkRect bound2 = SkRect::MakeIWH(kBitmapSize, kBitmapSize);
86
87 sk_sp<SkImageFilter> tif(SkImageFilters::Tile(
88 SkRect::MakeIWH(kBitmapSize, kBitmapSize),
89 SkRect::MakeIWH(kBitmapSize, kBitmapSize),
90 nullptr));
91
92 p2.setImageFilter(std::move(tif));
93
94 canvas->translate(320, 320);
95 canvas->saveLayer(&bound2, &p2);
96 canvas->setMatrix(SkMatrix::I());
97
98 SkRect bound3 = SkRect::MakeXYWH(320, 320,
99 SkIntToScalar(kBitmapSize),
100 SkIntToScalar(kBitmapSize));
101 canvas->drawImageRect(fGreenImage.get(), bound2, bound3, nullptr,
102 SkCanvas::kStrict_SrcRectConstraint);
103 canvas->restore();
104 }
105 }
106
107 private:
108 static constexpr int kWidth = 512;
109 static constexpr int kHeight = 512;
110 static constexpr int kBitmapSize = 64;
111
112 sk_sp<SkImage> fRedImage;
113 sk_sp<SkImage> fGreenImage;
114
115 using INHERITED = GM;
116 };
117
118 //////////////////////////////////////////////////////////////////////////////
119
120 DEF_GM(return new BigTileImageFilterGM;)
121 } // namespace skiagm
122