1
2
3 /*
4 * Copyright 2012 Google Inc.
5 *
6 * Use of this source code is governed by a BSD-style license that can be
7 * found in the LICENSE file.
8 */
9
10 #include "gm.h"
11 #include "SkCanvas.h"
12 #include "SkPicture.h"
13 #include "SkPictureRecorder.h"
14
15 namespace skiagm {
16
17 class DistantClipGM : public GM {
18 public:
DistantClipGM()19 DistantClipGM() { }
20
21 protected:
22
onShortName()23 SkString onShortName() {
24 return SkString("distantclip");
25 }
26
onISize()27 SkISize onISize() { return SkISize::Make(100, 100); }
28
onDraw(SkCanvas * canvas)29 virtual void onDraw(SkCanvas* canvas) {
30 int offset = 35000;
31 int extents = 1000;
32
33 SkPictureRecorder recorder;
34 // We record a picture of huge vertical extents in which we clear the canvas to red, create
35 // a 'extents' by 'extents' round rect clip at a vertical offset of 'offset', then draw
36 // green into that.
37 SkCanvas* rec = recorder.beginRecording(100, offset + extents, NULL, 0);
38 rec->drawColor(0xffff0000);
39 rec->save();
40 SkRect r = {
41 SkIntToScalar(-extents),
42 SkIntToScalar(offset - extents),
43 SkIntToScalar(extents),
44 SkIntToScalar(offset + extents)
45 };
46 SkPath p;
47 p.addRoundRect(r, 5, 5);
48 rec->clipPath(p, SkRegion::kIntersect_Op, true);
49 rec->drawColor(0xff00ff00);
50 rec->restore();
51 SkAutoTUnref<SkPicture> pict(recorder.endRecording());
52
53 // Next we play that picture into another picture of the same size.
54 pict->draw(recorder.beginRecording(100, offset + extents, NULL, 0));
55 SkAutoTUnref<SkPicture> pict2(recorder.endRecording());
56
57 // Finally we play the part of that second picture that should be green into the canvas.
58 canvas->save();
59 canvas->translate(SkIntToScalar(extents / 2),
60 SkIntToScalar(-(offset - extents / 2)));
61 pict2->draw(canvas);
62 canvas->restore();
63
64 // If the image is red, we erroneously decided the clipPath was empty and didn't record
65 // the green drawColor, if it's green we're all good.
66 }
67
68 private:
69 typedef GM INHERITED;
70 };
71
72 ///////////////////////////////////////////////////////////////////////////////
73
MyFactory(void *)74 static GM* MyFactory(void*) { return new DistantClipGM; }
75 static GMRegistry reg(MyFactory);
76
77 }
78