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.h"
9#include "SkBitmapSource.h"
10
11namespace skiagm {
12
13// This GM reproduces the issue in crbug.com/472795. The SkBitmapSource image
14// is shifted for high quality mode between cpu and gpu.
15class BitmapSourceGM : public GM {
16public:
17    BitmapSourceGM(const char* suffix, SkFilterQuality filter) : fSuffix(suffix), fFilter(filter) {
18        this->setBGColor(0xFFFFFFFF);
19    }
20
21protected:
22    SkString onShortName() override {
23        SkString name("bitmapsrc2_");
24        name.append(fSuffix);
25        return name;
26    }
27
28    SkISize onISize() override { return SkISize::Make(256, 256); }
29
30    // Create a bitmap with high frequency vertical stripes
31    void onOnceBeforeDraw() override {
32        static const SkPMColor gColors[] = {
33            SK_ColorRED,     SK_ColorGRAY,
34            SK_ColorGREEN,   SK_ColorGRAY,
35            SK_ColorBLUE,    SK_ColorGRAY,
36            SK_ColorCYAN,    SK_ColorGRAY,
37            SK_ColorMAGENTA, SK_ColorGRAY,
38            SK_ColorYELLOW,  SK_ColorGRAY,
39            SK_ColorWHITE,   SK_ColorGRAY,
40        };
41
42        fBM.allocN32Pixels(kImageSize, kImageSize, true);
43
44        SkCanvas canvas(fBM);
45
46        int curColor = 0;
47
48        for (int x = 0; x < kImageSize; x += 3) {
49            SkRect r = SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(0),
50                                        SkIntToScalar(3), SkIntToScalar(kImageSize));
51            SkPaint p;
52            p.setColor(gColors[curColor]);
53            canvas.drawRect(r, p);
54
55            curColor = (curColor+1) % SK_ARRAY_COUNT(gColors);
56        }
57    }
58
59    void onDraw(SkCanvas* canvas) override {
60        SkRect srcRect = SkRect::MakeLTRB(0, 0,
61                                          SkIntToScalar(kImageSize), SkIntToScalar(kImageSize));
62        SkRect dstRect = SkRect::MakeLTRB(0.75f, 0.75f, 225.75f, 225.75f);
63
64        SkAutoTUnref<SkImageFilter> filter(SkBitmapSource::Create(fBM, srcRect, dstRect, fFilter));
65
66        SkPaint p;
67        p.setImageFilter(filter);
68
69        canvas->saveLayer(NULL, &p);
70        canvas->restore();
71    }
72
73private:
74    static const int kImageSize = 503;
75
76    SkString fSuffix;
77    SkFilterQuality fFilter;
78    SkBitmap fBM;
79
80    typedef GM INHERITED;
81};
82
83//////////////////////////////////////////////////////////////////////////////
84
85DEF_GM( return SkNEW_ARGS(BitmapSourceGM, ("none", kNone_SkFilterQuality) );   )
86DEF_GM( return SkNEW_ARGS(BitmapSourceGM, ("low",  kLow_SkFilterQuality) );    )
87DEF_GM( return SkNEW_ARGS(BitmapSourceGM, ("med",  kMedium_SkFilterQuality) ); )
88DEF_GM( return SkNEW_ARGS(BitmapSourceGM, ("high", kHigh_SkFilterQuality) );   )
89
90}
91