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/SkBitmap.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkFilterQuality.h"
12 #include "include/core/SkFont.h"
13 #include "include/core/SkMatrix.h"
14 #include "include/core/SkPaint.h"
15 #include "include/core/SkRect.h"
16 #include "include/core/SkScalar.h"
17 #include "include/core/SkShader.h"
18 #include "include/core/SkSize.h"
19 #include "include/core/SkString.h"
20 #include "include/core/SkTileMode.h"
21 #include "include/core/SkTypeface.h"
22 #include "include/core/SkTypes.h"
23 #include "tools/ToolUtils.h"
24 
25 // Inspired by svg/as-border-image/svg-as-border-image.html. Draws a four-color checker board bitmap
26 // such that it is stretched and repeat tiled with different filter qualities. It is testing whether
27 // the bmp filter respects the repeat mode at the tile seams.
28 class BmpFilterQualityRepeat : public skiagm::GM {
29 public:
BmpFilterQualityRepeat()30     BmpFilterQualityRepeat() { this->setBGColor(ToolUtils::color_to_565(0xFFCCBBAA)); }
31 
32 protected:
33 
onOnceBeforeDraw()34     void onOnceBeforeDraw() override {
35         fBmp.allocN32Pixels(40, 40, true);
36         SkCanvas canvas(fBmp);
37         SkBitmap colorBmp;
38         colorBmp.allocN32Pixels(20, 20, true);
39         colorBmp.eraseColor(0xFFFF0000);
40         canvas.drawBitmap(colorBmp, 0, 0);
41         colorBmp.eraseColor(ToolUtils::color_to_565(0xFF008200));
42         canvas.drawBitmap(colorBmp, 20, 0);
43         colorBmp.eraseColor(ToolUtils::color_to_565(0xFFFF9000));
44         canvas.drawBitmap(colorBmp, 0, 20);
45         colorBmp.eraseColor(ToolUtils::color_to_565(0xFF2000FF));
46         canvas.drawBitmap(colorBmp, 20, 20);
47     }
48 
onShortName()49     SkString onShortName() override { return SkString("bmp_filter_quality_repeat"); }
50 
onISize()51     SkISize onISize() override { return SkISize::Make(1000, 400); }
52 
onDraw(SkCanvas * canvas)53     void onDraw(SkCanvas* canvas) override {
54         this->drawAll(canvas, 2.5f);
55         canvas->translate(0, 250);
56         canvas->scale(0.5, 0.5);
57         this->drawAll(canvas, 1);
58     }
59 
60 private:
drawAll(SkCanvas * canvas,SkScalar scaleX) const61     void drawAll(SkCanvas* canvas, SkScalar scaleX) const {
62         constexpr struct {
63             SkFilterQuality fQuality;
64             const char* fName;
65         } kQualities[] = {
66             {kNone_SkFilterQuality, "none"},
67             {kLow_SkFilterQuality, "low"},
68             {kMedium_SkFilterQuality, "medium"},
69             {kHigh_SkFilterQuality, "high"},
70         };
71 
72         SkRect rect = SkRect::MakeLTRB(20, 60, 220, 210);
73         SkMatrix lm = SkMatrix::I();
74         lm.setScaleX(scaleX);
75         lm.setTranslateX(423);
76         lm.setTranslateY(330);
77 
78         SkPaint textPaint;
79         textPaint.setAntiAlias(true);
80 
81         SkPaint bmpPaint(textPaint);
82 
83         SkFont font(ToolUtils::create_portable_typeface());
84 
85         SkAutoCanvasRestore acr(canvas, true);
86 
87         for (size_t q = 0; q < SK_ARRAY_COUNT(kQualities); ++q) {
88             constexpr SkTileMode kTM = SkTileMode::kRepeat;
89             bmpPaint.setShader(fBmp.makeShader(kTM, kTM, &lm));
90             bmpPaint.setFilterQuality(kQualities[q].fQuality);
91             canvas->drawRect(rect, bmpPaint);
92             canvas->drawString(kQualities[q].fName, 20, 40, font, textPaint);
93             canvas->translate(250, 0);
94         }
95 
96     }
97 
98     SkBitmap    fBmp;
99 
100     using INHERITED = skiagm::GM;
101 };
102 
103 //////////////////////////////////////////////////////////////////////////////
104 
105 DEF_GM(return new BmpFilterQualityRepeat;)
106