1/*
2 * Copyright 2014 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
10namespace skiagm {
11
12// This GM exercises the use case found in crbug.com/423834.
13// The following pattern:
14//    save();
15//    clipRect(rect, noAA);
16//    drawRect(bigRect, noAA);
17//    restore();
18//
19//    drawRect(rect, noAA);
20// can leave 1 pixel wide remnants of the first rect.
21class ClipDrawDrawGM : public GM {
22public:
23    ClipDrawDrawGM() { this->setBGColor(0xFFCCCCCC); }
24
25protected:
26    SkString onShortName() override { return SkString("clipdrawdraw"); }
27
28    SkISize onISize() override { return SkISize::Make(512, 512); }
29
30    static void Draw(SkCanvas* canvas, const SkRect& rect) {
31        SkPaint p;
32        p.setAntiAlias(false);
33
34        const SkRect bigRect = SkRect::MakeWH(600, 600);
35
36        canvas->save();
37            // draw a black rect through the clip
38            canvas->save();
39                canvas->clipRect(rect);
40                canvas->drawRect(bigRect, p);
41            canvas->restore();
42
43            // now draw the white rect on top
44            p.setColor(SK_ColorWHITE);
45            canvas->drawRect(rect, p);
46        canvas->restore();
47    }
48
49    void onDraw(SkCanvas* canvas) override {
50        // Vertical remnant
51        const SkRect rect1 = SkRect::MakeLTRB(136.5f, 137.5f, 338.5f, 293.5f);
52
53        // Horizontal remnant
54        // 179.488 rounds the right way (i.e., 179), 179.499 rounds the wrong way (i.e., 180)
55        const SkRect rect2 = SkRect::MakeLTRB(207.5f, 179.499f, 530.5f, 429.5f);
56
57        Draw(canvas, rect1);
58        Draw(canvas, rect2);
59    }
60
61private:
62    typedef GM INHERITED;
63};
64
65//////////////////////////////////////////////////////////////////////////////
66
67DEF_GM(return SkNEW(ClipDrawDrawGM);)
68
69}
70