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