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