1 /*
2 * Copyright 2013 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 "SkCanvas.h"
10 #include "SkLerpXfermode.h"
11
show_circlelayers(SkCanvas * canvas,SkXfermode * mode)12 static void show_circlelayers(SkCanvas* canvas, SkXfermode* mode) {
13 SkPaint paint;
14 paint.setAntiAlias(true);
15 SkRect r, bounds = { 10, 10, 110, 110 };
16
17 r = bounds;
18 r.fRight = bounds.centerX();
19 canvas->drawRect(r, paint);
20
21 canvas->saveLayer(&bounds, NULL);
22
23 paint.setColor(0x80FF0000);
24 r = bounds;
25 r.inset(20, 0);
26 canvas->drawOval(r, paint);
27
28 paint.setColor(0x800000FF);
29 r = bounds;
30 r.inset(0, 20);
31 paint.setXfermode(mode);
32 canvas->drawOval(r, paint);
33
34 canvas->restore();
35 }
36
37 class LerpXfermodeGM : public skiagm::GM {
38 public:
LerpXfermodeGM()39 LerpXfermodeGM() {}
40
41 protected:
onGetFlags() const42 virtual uint32_t onGetFlags() const SK_OVERRIDE {
43 return kSkipTiled_Flag;
44 }
45
onShortName()46 virtual SkString onShortName() SK_OVERRIDE {
47 return SkString("lerpmode");
48 }
49
onISize()50 virtual SkISize onISize() SK_OVERRIDE {
51 return SkISize::Make(240, 120);
52 }
53
onDraw(SkCanvas * canvas)54 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
55 show_circlelayers(canvas, NULL);
56 canvas->translate(150, 0);
57 SkAutoTUnref<SkXfermode> mode(SkLerpXfermode::Create(0.5f));
58 show_circlelayers(canvas, mode.get());
59 }
60
61 private:
62 typedef skiagm::GM INHERITED;
63 };
64
65 //////////////////////////////////////////////////////////////////////////////
66
67 DEF_GM( return SkNEW(LerpXfermodeGM); )
68