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
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
|
/*
* 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 "SkBitmap.h"
#include "SkGradientShader.h"
#include "SkXfermode.h"
#include "SkColorPriv.h"
#if SK_SUPPORT_GPU
#include "GrContext.h"
#include "SkGpuDevice.h"
#endif
namespace skiagm {
/**
* This tests drawing device-covering rects with solid colors and bitmap shaders over a
* checkerboard background using different xfermodes.
*/
class Xfermodes3GM : public GM {
public:
Xfermodes3GM() {}
protected:
virtual SkString onShortName() SK_OVERRIDE {
return SkString("xfermodes3");
}
virtual SkISize onISize() SK_OVERRIDE {
return SkISize::Make(630, 1215);
}
virtual void onDrawBackground(SkCanvas* canvas) SK_OVERRIDE {
SkPaint bgPaint;
bgPaint.setColor(0xFF70D0E0);
canvas->drawPaint(bgPaint);
}
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
canvas->translate(SkIntToScalar(10), SkIntToScalar(20));
SkPaint labelP;
labelP.setAntiAlias(true);
sk_tool_utils::set_portable_typeface(&labelP);
static const SkColor kSolidColors[] = {
SK_ColorTRANSPARENT,
SK_ColorBLUE,
0x80808000
};
static const SkColor kBmpAlphas[] = {
0xff,
0x80,
};
SkAutoTUnref<SkCanvas> tempCanvas(this->possiblyCreateTempCanvas(canvas, kSize, kSize));
int test = 0;
int x = 0, y = 0;
static const struct { SkPaint::Style fStyle; SkScalar fWidth; } kStrokes[] = {
{SkPaint::kFill_Style, 0},
{SkPaint::kStroke_Style, SkIntToScalar(kSize) / 2},
};
for (size_t s = 0; s < SK_ARRAY_COUNT(kStrokes); ++s) {
for (size_t m = 0; m <= SkXfermode::kLastMode; ++m) {
SkXfermode::Mode mode = static_cast<SkXfermode::Mode>(m);
canvas->drawText(SkXfermode::ModeName(mode),
strlen(SkXfermode::ModeName(mode)),
SkIntToScalar(x),
SkIntToScalar(y + kSize + 3) + labelP.getTextSize(),
labelP);
for (size_t c = 0; c < SK_ARRAY_COUNT(kSolidColors); ++c) {
SkPaint modePaint;
modePaint.setXfermodeMode(mode);
modePaint.setColor(kSolidColors[c]);
modePaint.setStyle(kStrokes[s].fStyle);
modePaint.setStrokeWidth(kStrokes[s].fWidth);
this->drawMode(canvas, x, y, kSize, kSize, modePaint, tempCanvas.get());
++test;
x += kSize + 10;
if (!(test % kTestsPerRow)) {
x = 0;
y += kSize + 30;
}
}
for (size_t a = 0; a < SK_ARRAY_COUNT(kBmpAlphas); ++a) {
SkPaint modePaint;
modePaint.setXfermodeMode(mode);
modePaint.setAlpha(kBmpAlphas[a]);
modePaint.setShader(fBmpShader);
modePaint.setStyle(kStrokes[s].fStyle);
modePaint.setStrokeWidth(kStrokes[s].fWidth);
this->drawMode(canvas, x, y, kSize, kSize, modePaint, tempCanvas.get());
++test;
x += kSize + 10;
if (!(test % kTestsPerRow)) {
x = 0;
y += kSize + 30;
}
}
}
}
}
private:
/**
* GrContext has optimizations around full rendertarget draws that can be replaced with clears.
* We are trying to test those. We could use saveLayer() to create small SkGpuDevices but
* saveLayer() uses the texture cache. This means that the actual render target may be larger
* than the layer. Because the clip will contain the layer's bounds, no draws will be full-RT.
* So when running on a GPU canvas we explicitly create a temporary canvas using a texture with
* dimensions exactly matching the layer size.
*/
SkCanvas* possiblyCreateTempCanvas(SkCanvas* baseCanvas, int w, int h) {
SkCanvas* tempCanvas = NULL;
#if SK_SUPPORT_GPU
GrContext* context = baseCanvas->getGrContext();
if (context) {
GrSurfaceDesc desc;
desc.fWidth = w;
desc.fHeight = h;
desc.fConfig = SkImageInfo2GrPixelConfig(baseCanvas->imageInfo());
desc.fFlags = kRenderTarget_GrSurfaceFlag;
SkAutoTUnref<GrSurface> surface(context->createUncachedTexture(desc, NULL, 0));
SkAutoTUnref<SkBaseDevice> device(SkGpuDevice::Create(surface.get(),
SkSurfaceProps(SkSurfaceProps::kLegacyFontHost_InitType)));
if (device.get()) {
tempCanvas = SkNEW_ARGS(SkCanvas, (device.get()));
}
}
#endif
return tempCanvas;
}
void drawMode(SkCanvas* canvas,
int x, int y, int w, int h,
const SkPaint& modePaint, SkCanvas* layerCanvas) {
canvas->save();
canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
SkRect r = SkRect::MakeWH(SkIntToScalar(w), SkIntToScalar(h));
SkCanvas* modeCanvas;
if (NULL == layerCanvas) {
canvas->saveLayer(&r, NULL);
modeCanvas = canvas;
} else {
modeCanvas = layerCanvas;
}
SkPaint bgPaint;
bgPaint.setAntiAlias(false);
bgPaint.setShader(fBGShader);
modeCanvas->drawRect(r, bgPaint);
modeCanvas->drawRect(r, modePaint);
modeCanvas = NULL;
if (NULL == layerCanvas) {
canvas->restore();
} else {
SkAutoROCanvasPixels ropixels(layerCanvas);
SkBitmap bitmap;
if (ropixels.asROBitmap(&bitmap)) {
canvas->drawBitmap(bitmap, 0, 0);
}
}
r.inset(-SK_ScalarHalf, -SK_ScalarHalf);
SkPaint borderPaint;
borderPaint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(r, borderPaint);
canvas->restore();
}
virtual void onOnceBeforeDraw() SK_OVERRIDE {
static const uint32_t kCheckData[] = {
SkPackARGB32(0xFF, 0x40, 0x40, 0x40),
SkPackARGB32(0xFF, 0xD0, 0xD0, 0xD0),
SkPackARGB32(0xFF, 0xD0, 0xD0, 0xD0),
SkPackARGB32(0xFF, 0x40, 0x40, 0x40)
};
SkBitmap bg;
bg.allocN32Pixels(2, 2, true);
SkAutoLockPixels bgAlp(bg);
memcpy(bg.getPixels(), kCheckData, sizeof(kCheckData));
SkMatrix lm;
lm.setScale(SkIntToScalar(kCheckSize), SkIntToScalar(kCheckSize));
fBGShader.reset(SkShader::CreateBitmapShader(bg,
SkShader::kRepeat_TileMode,
SkShader::kRepeat_TileMode,
&lm));
SkPaint bmpPaint;
static const SkPoint kCenter = { SkIntToScalar(kSize) / 2, SkIntToScalar(kSize) / 2 };
static const SkColor kColors[] = { SK_ColorTRANSPARENT, 0x80800000,
0xF020F060, SK_ColorWHITE };
bmpPaint.setShader(SkGradientShader::CreateRadial(kCenter,
3 * SkIntToScalar(kSize) / 4,
kColors,
NULL,
SK_ARRAY_COUNT(kColors),
SkShader::kRepeat_TileMode))->unref();
SkBitmap bmp;
bmp.allocN32Pixels(kSize, kSize);
SkCanvas bmpCanvas(bmp);
bmpCanvas.clear(SK_ColorTRANSPARENT);
SkRect rect = { SkIntToScalar(kSize) / 8, SkIntToScalar(kSize) / 8,
7 * SkIntToScalar(kSize) / 8, 7 * SkIntToScalar(kSize) / 8};
bmpCanvas.drawRect(rect, bmpPaint);
fBmpShader.reset(SkShader::CreateBitmapShader(bmp,
SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode));
}
enum {
kCheckSize = 8,
kSize = 30,
kTestsPerRow = 15,
};
SkAutoTUnref<SkShader> fBGShader;
SkAutoTUnref<SkShader> fBmpShader;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new Xfermodes3GM;)
}
|
