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 #include "sk_tool_utils.h"
10 #include "SkRegion.h"
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.
Draw(SkCanvas * canvas,const SkRect & rect)21 static void Draw(SkCanvas* canvas, const SkRect& rect) {
22 SkPaint p;
23 p.setAntiAlias(false);
24
25 const SkRect bigRect = SkRect::MakeWH(600, 600);
26
27 canvas->save();
28 // draw a black rect through the clip
29 canvas->save();
30 canvas->clipRect(rect);
31 canvas->drawRect(bigRect, p);
32 canvas->restore();
33
34 // now draw the white rect on top
35 p.setColor(SK_ColorWHITE);
36 canvas->drawRect(rect, p);
37 canvas->restore();
38 }
39
40 DEF_SIMPLE_GM_BG(clipdrawdraw, canvas, 512, 512,
41 sk_tool_utils::color_to_565(0xFFCCCCCC)) {
42 // Vertical remnant
43 const SkRect rect1 = SkRect::MakeLTRB(136.5f, 137.5f, 338.5f, 293.5f);
44
45 // Horizontal remnant
46 // 179.488 rounds the right way (i.e., 179), 179.499 rounds the wrong way (i.e., 180)
47 const SkRect rect2 = SkRect::MakeLTRB(207.5f, 179.499f, 530.5f, 429.5f);
48
49 Draw(canvas, rect1);
50 Draw(canvas, rect2);
51 }
52
53 ///////////////////////////////////////////////////////////////////////////////////////////////////
54
55 DEF_SIMPLE_GM(clip_region, canvas, 256, 256) {
56 SkRegion rgn({ 10, 10, 100, 100 });
57
58 canvas->save();
59 canvas->clipRegion(rgn);
60 canvas->drawColor(SK_ColorRED);
61 canvas->restore();
62
63 SkRect bounds = { 30, 30, 80, 80 };
64 canvas->saveLayer(&bounds, nullptr);
65 canvas->clipRegion(rgn);
66 canvas->drawColor(SK_ColorBLUE);
67 canvas->restore();
68 }
69