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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/*
* Copyright 2011 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 "SkColorPriv.h"
#include "SkShader.h"
static void test4(SkCanvas* canvas) {
SkPaint paint;
paint.setAntiAlias(true);
SkPoint pts[] = {
{10, 160}, {610, 160},
{610, 160}, {10, 160},
{610, 160}, {610, 160},
{610, 199}, {610, 199},
{10, 198}, {610, 198},
{610, 199}, {10, 199},
{10, 160}, {10, 160},
{10, 199}, {10, 199}
};
char verbs[] = {
0, 1, 1, 1, 4,
0, 1, 1, 1, 4,
0, 1, 1, 1, 4,
0, 1, 1, 1, 4
};
SkPath path;
SkPoint* ptPtr = pts;
for (size_t i = 0; i < sizeof(verbs); ++i) {
switch ((SkPath::Verb) verbs[i]) {
case SkPath::kMove_Verb:
path.moveTo(ptPtr->fX, ptPtr->fY);
++ptPtr;
break;
case SkPath::kLine_Verb:
path.lineTo(ptPtr->fX, ptPtr->fY);
++ptPtr;
break;
case SkPath::kClose_Verb:
path.close();
break;
default:
SkASSERT(false);
break;
}
}
SkRect clip = {0, 130, 772, 531};
canvas->clipRect(clip);
canvas->drawPath(path, paint);
}
static const struct {
SkXfermode::Mode fMode;
const char* fLabel;
} gModes[] = {
{ SkXfermode::kClear_Mode, "Clear" },
{ SkXfermode::kSrc_Mode, "Src" },
{ SkXfermode::kDst_Mode, "Dst" },
{ SkXfermode::kSrcOver_Mode, "SrcOver" },
{ SkXfermode::kDstOver_Mode, "DstOver" },
{ SkXfermode::kSrcIn_Mode, "SrcIn" },
{ SkXfermode::kDstIn_Mode, "DstIn" },
{ SkXfermode::kSrcOut_Mode, "SrcOut" },
{ SkXfermode::kDstOut_Mode, "DstOut" },
{ SkXfermode::kSrcATop_Mode, "SrcATop" },
{ SkXfermode::kDstATop_Mode, "DstATop" },
{ SkXfermode::kXor_Mode, "Xor" },
};
const int gWidth = 64;
const int gHeight = 64;
const SkScalar W = SkIntToScalar(gWidth);
const SkScalar H = SkIntToScalar(gHeight);
static SkScalar drawCell(SkCanvas* canvas, SkXfermode* mode,
SkAlpha a0, SkAlpha a1) {
SkPaint paint;
paint.setAntiAlias(true);
SkRect r = SkRect::MakeWH(W, H);
r.inset(W/10, H/10);
paint.setColor(SK_ColorBLUE);
paint.setAlpha(a0);
canvas->drawOval(r, paint);
paint.setColor(SK_ColorRED);
paint.setAlpha(a1);
paint.setXfermode(mode);
SkScalar offset = SK_Scalar1 / 3;
SkRect rect = SkRect::MakeXYWH(W / 4 + offset,
H / 4 + offset,
W / 2, H / 2);
canvas->drawRect(rect, paint);
return H;
}
static SkShader* make_bg_shader() {
SkBitmap bm;
bm.setConfig(SkBitmap::kARGB_8888_Config, 2, 2);
bm.allocPixels();
*bm.getAddr32(0, 0) = *bm.getAddr32(1, 1) = 0xFFFFFFFF;
*bm.getAddr32(1, 0) = *bm.getAddr32(0, 1) = SkPackARGB32(0xFF, 0xCC,
0xCC, 0xCC);
SkShader* s = SkShader::CreateBitmapShader(bm,
SkShader::kRepeat_TileMode,
SkShader::kRepeat_TileMode);
SkMatrix m;
m.setScale(SkIntToScalar(6), SkIntToScalar(6));
s->setLocalMatrix(m);
return s;
}
namespace skiagm {
class AARectModesGM : public GM {
SkPaint fBGPaint;
public:
AARectModesGM () {
fBGPaint.setShader(make_bg_shader())->unref();
}
protected:
virtual SkString onShortName() {
return SkString("aarectmodes");
}
virtual SkISize onISize() { return make_isize(640, 480); }
virtual void onDraw(SkCanvas* canvas) {
if (false) { // avoid bit rot, suppress warning
test4(canvas);
}
const SkRect bounds = SkRect::MakeWH(W, H);
static const SkAlpha gAlphaValue[] = { 0xFF, 0x88, 0x88 };
canvas->translate(SkIntToScalar(4), SkIntToScalar(4));
for (int alpha = 0; alpha < 4; ++alpha) {
canvas->save();
canvas->save();
for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); ++i) {
if (6 == i) {
canvas->restore();
canvas->translate(W * 5, 0);
canvas->save();
}
SkXfermode* mode = SkXfermode::Create(gModes[i].fMode);
canvas->drawRect(bounds, fBGPaint);
canvas->saveLayer(&bounds, NULL);
SkScalar dy = drawCell(canvas, mode,
gAlphaValue[alpha & 1],
gAlphaValue[alpha & 2]);
canvas->restore();
canvas->translate(0, dy * 5 / 4);
SkSafeUnref(mode);
}
canvas->restore();
canvas->restore();
canvas->translate(W * 5 / 4, 0);
}
}
// disable pdf for now, since it crashes on mac
virtual uint32_t onGetFlags() const { return kSkipPDF_Flag; }
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new AARectModesGM; }
static GMRegistry reg(MyFactory);
}
|
