1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkCanvas.h"
#include "SkLumaXfermode.h"
static void show_scene(SkCanvas* canvas, SkXfermode* mode, const char* label) {
SkPaint paint;
paint.setAntiAlias(true);
SkRect r, c, bounds = { 10, 10, 110, 110 };
c = bounds;
c.fRight = bounds.centerX();
r = bounds;
r.fBottom = bounds.centerY();
canvas->drawRect(r, paint);
SkScalar tw = paint.measureText(label, strlen(label));
canvas->drawText(label, strlen(label), bounds.centerX() - tw / 2,
bounds.bottom() + 15, paint);
canvas->saveLayer(&bounds, NULL);
r = bounds;
r.inset(20, 0);
paint.setColor(0x80FFFF00);
canvas->drawOval(r, paint);
canvas->save();
canvas->clipRect(c);
paint.setColor(0xFFFFFF00);
canvas->drawOval(r, paint);
canvas->restore();
SkPaint xferPaint;
xferPaint.setXfermode(mode);
canvas->saveLayer(&bounds, &xferPaint);
r = bounds;
r.inset(0, 20);
paint.setColor(0x8080FF00);
canvas->drawOval(r, paint);
canvas->save();
canvas->clipRect(c);
paint.setColor(0xFF80FF00);
canvas->drawOval(r, paint);
canvas->restore();
canvas->restore();
canvas->restore();
}
class LumaXfermodeGM : public skiagm::GM {
public:
LumaXfermodeGM() {}
protected:
virtual SkString onShortName() SK_OVERRIDE {
return SkString("lumamode");
}
virtual SkISize onISize() SK_OVERRIDE {
return SkISize::Make(450, 140);
}
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
show_scene(canvas, NULL, "SrcOver");
canvas->translate(150, 0);
SkAutoTUnref<SkXfermode> src_in(SkLumaMaskXfermode::Create(SkXfermode::kSrcIn_Mode));
show_scene(canvas, src_in.get(), "SrcInLuma");
canvas->translate(150, 0);
SkAutoTUnref<SkXfermode> dst_in(SkLumaMaskXfermode::Create(SkXfermode::kDstIn_Mode));
show_scene(canvas, dst_in.get(), "DstInLuma");
}
private:
typedef skiagm::GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM( return SkNEW(LumaXfermodeGM); )
|
