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 "gm.h"
9 #include "SkColorPriv.h"
10 #include "SkImageShader.h"
11
make_image(int firstBlackRow,int lastBlackRow)12 static const sk_sp<SkImage> make_image(int firstBlackRow, int lastBlackRow) {
13 static const int kWidth = 25;
14 static const int kHeight = 27;
15
16 SkBitmap bm;
17 bm.allocN32Pixels(kWidth, kHeight);
18 bm.eraseColor(SK_ColorWHITE);
19 for (int y = firstBlackRow; y < lastBlackRow; ++y) {
20 for (int x = 0; x < kWidth; ++x) {
21 *bm.getAddr32(x, y) = SkPackARGB32(0xFF, 0x0, 0x0, 0x0);
22 }
23 }
24
25 bm.setAlphaType(SkAlphaType::kOpaque_SkAlphaType);
26 bm.setImmutable();
27
28 return SkImage::MakeFromBitmap(bm);
29 }
30
31 // GM to reproduce crbug.com/673261.
32 class FilterBugGM : public skiagm::GM {
33 public:
FilterBugGM()34 FilterBugGM() { this->setBGColor(SK_ColorRED); }
35
36 protected:
onShortName()37 SkString onShortName() override { return SkString("filterbug"); }
38
onISize()39 SkISize onISize() override { return SkISize::Make(150, 150); }
40
onOnceBeforeDraw()41 void onOnceBeforeDraw() override {
42 // The top texture has 5 black rows on top and then 22 white rows on the bottom
43 fTop = make_image(0, 5);
44 // The bottom texture has 5 black rows on the bottom and then 22 white rows on the top
45 fBot = make_image(22, 27);
46 }
47
onDraw(SkCanvas * canvas)48 void onDraw(SkCanvas* canvas) override {
49 static const SkFilterQuality kFilterQuality = SkFilterQuality::kHigh_SkFilterQuality;
50 static const bool kDoAA = true;
51
52 {
53 SkRect r1 = SkRect::MakeXYWH(50.0f, 0.0f, 50.0f, 50.0f);
54 SkPaint p1;
55 p1.setAntiAlias(kDoAA);
56 p1.setFilterQuality(kFilterQuality);
57 SkMatrix localMat;
58 localMat.setScaleTranslate(2.0f, 2.0f, 50.0f, 0.0f);
59 p1.setShader(SkImageShader::Make(fTop,
60 SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode,
61 &localMat));
62
63 canvas->drawRect(r1, p1);
64 }
65
66 {
67 SkRect r2 = SkRect::MakeXYWH(50.0f, 50.0f, 50.0f, 36.0f);
68
69 SkPaint p2;
70 p2.setColor(SK_ColorWHITE);
71 p2.setAntiAlias(kDoAA);
72 p2.setFilterQuality(kFilterQuality);
73
74 canvas->drawRect(r2, p2);
75 }
76
77 {
78 SkRect r3 = SkRect::MakeXYWH(50.0f, 86.0f, 50.0f, 50.0f);
79
80 SkPaint p3;
81 p3.setAntiAlias(kDoAA);
82 p3.setFilterQuality(kFilterQuality);
83 SkMatrix localMat;
84 localMat.setScaleTranslate(2.0f, 2.0f, 50.0f, 86.0f);
85 p3.setShader(SkImageShader::Make(fBot,
86 SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode,
87 &localMat));
88
89 canvas->drawRect(r3, p3);
90 }
91 }
92
93 private:
94 sk_sp<SkImage> fTop;
95 sk_sp<SkImage> fBot;
96
97 typedef skiagm::GM INHERITED;
98 };
99
100 //////////////////////////////////////////////////////////////////////////////
101
102 DEF_GM(return new FilterBugGM;)
103