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.
15class BmpFilterQualityRepeat : public skiagm::GM {
16public:
17    BmpFilterQualityRepeat() { this->setBGColor(sk_tool_utils::color_to_565(0xFFCCBBAA)); }
18
19protected:
20
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(sk_tool_utils::color_to_565(0xFF008200));
29        canvas.drawBitmap(colorBmp, 20, 0);
30        colorBmp.eraseColor(sk_tool_utils::color_to_565(0xFFFF9000));
31        canvas.drawBitmap(colorBmp, 0, 20);
32        colorBmp.eraseColor(sk_tool_utils::color_to_565(0xFF2000FF));
33        canvas.drawBitmap(colorBmp, 20, 20);
34    }
35
36    SkString onShortName() override { return SkString("bmp_filter_quality_repeat"); }
37
38    SkISize onISize() override { return SkISize::Make(1000, 235); }
39
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            sk_tool_utils::set_portable_typeface(&paint);
55            paint.setFilterQuality(kQualities[q].fQuality);
56            SkPaint bmpPaint(paint);
57            SkMatrix lm = SkMatrix::I();
58            lm.setScaleX(2.5);
59            lm.setTranslateX(423);
60            lm.setTranslateY(330);
61
62            static const SkShader::TileMode kTM = SkShader::kRepeat_TileMode;
63            bmpPaint.setShader(SkShader::CreateBitmapShader(fBmp, kTM, kTM, &lm))->unref();
64            SkRect rect = SkRect::MakeLTRB(20, 60, 220, 210);
65            canvas->drawRect(rect, bmpPaint);
66            paint.setAntiAlias(true);
67            canvas->drawText(kQualities[q].fName, strlen(kQualities[q].fName), 20, 40, paint);
68            canvas->translate(250, 0);
69        }
70    }
71
72private:
73    SkBitmap    fBmp;
74
75    typedef skiagm::GM INHERITED;
76};
77
78//////////////////////////////////////////////////////////////////////////////
79
80DEF_GM(return new BmpFilterQualityRepeat;)
81