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 
10 #include "SkShader.h"
11 
12 // Inspired by svg/as-border-image/svg-as-border-image.html. Draws a four-color checker board bitmap
13 // such that it is stretched and repeat tiled with different filter qualities. It is testing whether
14 // the bmp filter respects the repeat mode at the tile seams.
15 class BmpFilterQualityRepeat : public skiagm::GM {
16 public:
BmpFilterQualityRepeat()17     BmpFilterQualityRepeat() { this->setBGColor(0xFFCCBBAA); }
18 
19 protected:
20 
onOnceBeforeDraw()21     void onOnceBeforeDraw() override {
22         fBmp.allocN32Pixels(40, 40, true);
23         SkCanvas canvas(fBmp);
24         SkBitmap colorBmp;
25         colorBmp.allocN32Pixels(20, 20, true);
26         colorBmp.eraseColor(0xFFFF0000);
27         canvas.drawBitmap(colorBmp, 0, 0);
28         colorBmp.eraseColor(0xFF008200);
29         canvas.drawBitmap(colorBmp, 20, 0);
30         colorBmp.eraseColor(0xFFFF9000);
31         canvas.drawBitmap(colorBmp, 0, 20);
32         colorBmp.eraseColor(0xFF2000FF);
33         canvas.drawBitmap(colorBmp, 20, 20);
34     }
35 
onShortName()36     SkString onShortName() override { return SkString("bmp_filter_quality_repeat"); }
37 
onISize()38     SkISize onISize() override { return SkISize::Make(1000, 235); }
39 
onDraw(SkCanvas * canvas)40     void onDraw(SkCanvas* canvas) override {
41 
42         static const struct {
43             SkFilterQuality fQuality;
44             const char* fName;
45         } kQualities[] = {
46             {kNone_SkFilterQuality, "none"},
47             {kLow_SkFilterQuality, "low"},
48             {kMedium_SkFilterQuality, "medium"},
49             {kHigh_SkFilterQuality, "high"},
50         };
51 
52         for (size_t q = 0; q < SK_ARRAY_COUNT(kQualities); ++q) {
53             SkPaint paint;
54             paint.setFilterQuality(kQualities[q].fQuality);
55             SkPaint bmpPaint(paint);
56             SkMatrix lm = SkMatrix::I();
57             lm.setScaleX(2.5);
58             lm.setTranslateX(423);
59             lm.setTranslateY(330);
60 
61             static const SkShader::TileMode kTM = SkShader::kRepeat_TileMode;
62             bmpPaint.setShader(SkShader::CreateBitmapShader(fBmp, kTM, kTM, &lm))->unref();
63             SkRect rect = SkRect::MakeLTRB(20, 60, 220, 210);
64             canvas->drawRect(rect, bmpPaint);
65             paint.setAntiAlias(true);
66             canvas->drawText(kQualities[q].fName, strlen(kQualities[q].fName), 20, 40, paint);
67             canvas->translate(250, 0);
68         }
69     }
70 
71 private:
72     SkBitmap    fBmp;
73 
74     typedef skiagm::GM INHERITED;
75 };
76 
77 //////////////////////////////////////////////////////////////////////////////
78 
79 DEF_GM( return SkNEW(BmpFilterQualityRepeat); )
80