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
|
/*
* 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 "SkBitmapDevice.h"
#include "SkCanvas.h"
#include "SkCanvasStateUtils.h"
#include "SkDrawFilter.h"
#include "SkError.h"
#include "SkPaint.h"
#include "SkRRect.h"
#include "SkRect.h"
#include "Test.h"
static void test_complex_layers(skiatest::Reporter* reporter) {
const int WIDTH = 400;
const int HEIGHT = 400;
const int SPACER = 10;
SkRect rect = SkRect::MakeXYWH(SkIntToScalar(SPACER), SkIntToScalar(SPACER),
SkIntToScalar(WIDTH-(2*SPACER)),
SkIntToScalar((HEIGHT-(2*SPACER)) / 7));
const SkColorType colorTypes[] = {
kRGB_565_SkColorType, kPMColor_SkColorType
};
const int configCount = sizeof(colorTypes) / sizeof(SkBitmap::Config);
const int layerAlpha[] = { 255, 255, 0 };
const SkCanvas::SaveFlags flags[] = { SkCanvas::kARGB_NoClipLayer_SaveFlag,
SkCanvas::kARGB_ClipLayer_SaveFlag,
SkCanvas::kARGB_NoClipLayer_SaveFlag
};
REPORTER_ASSERT(reporter, sizeof(layerAlpha) == sizeof(flags));
const int layerCombinations = sizeof(layerAlpha) / sizeof(int);
for (int i = 0; i < configCount; ++i) {
SkBitmap bitmaps[2];
for (int j = 0; j < 2; ++j) {
bitmaps[j].allocPixels(SkImageInfo::Make(WIDTH, HEIGHT,
colorTypes[i],
kPremul_SkAlphaType));
SkCanvas canvas(bitmaps[j]);
canvas.drawColor(SK_ColorRED);
for (int k = 0; k < layerCombinations; ++k) {
// draw a rect within the layer's bounds and again outside the layer's bounds
canvas.saveLayerAlpha(&rect, layerAlpha[k], flags[k]);
SkCanvasState* state = NULL;
SkCanvas* tmpCanvas = NULL;
if (j) {
state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
REPORTER_ASSERT(reporter, state);
tmpCanvas = SkCanvasStateUtils::CreateFromCanvasState(state);
REPORTER_ASSERT(reporter, tmpCanvas);
} else {
tmpCanvas = SkRef(&canvas);
}
SkPaint bluePaint;
bluePaint.setColor(SK_ColorBLUE);
bluePaint.setStyle(SkPaint::kFill_Style);
tmpCanvas->drawRect(rect, bluePaint);
tmpCanvas->translate(0, rect.height() + SPACER);
tmpCanvas->drawRect(rect, bluePaint);
tmpCanvas->unref();
SkCanvasStateUtils::ReleaseCanvasState(state);
canvas.restore();
// translate the canvas for the next iteration
canvas.translate(0, 2*(rect.height() + SPACER));
}
}
// now we memcmp the two bitmaps
REPORTER_ASSERT(reporter, bitmaps[0].getSize() == bitmaps[1].getSize());
REPORTER_ASSERT(reporter, !memcmp(bitmaps[0].getPixels(),
bitmaps[1].getPixels(),
bitmaps[0].getSize()));
}
}
////////////////////////////////////////////////////////////////////////////////
static void test_complex_clips(skiatest::Reporter* reporter) {
const int WIDTH = 400;
const int HEIGHT = 400;
const int SPACER = 10;
SkIRect layerRect = SkIRect::MakeWH(WIDTH, HEIGHT / 4);
layerRect.inset(2*SPACER, 2*SPACER);
SkIRect clipRect = layerRect;
clipRect.fRight = clipRect.fLeft + (clipRect.width() / 2) - (2*SPACER);
clipRect.outset(SPACER, SPACER);
SkIRect regionBounds = clipRect;
regionBounds.offset(clipRect.width() + (2*SPACER), 0);
SkIRect regionInterior = regionBounds;
regionInterior.inset(SPACER*3, SPACER*3);
SkRegion clipRegion;
clipRegion.setRect(regionBounds);
clipRegion.op(regionInterior, SkRegion::kDifference_Op);
const SkRegion::Op clipOps[] = { SkRegion::kIntersect_Op,
SkRegion::kIntersect_Op,
SkRegion::kReplace_Op,
};
const SkCanvas::SaveFlags flags[] = { SkCanvas::kARGB_NoClipLayer_SaveFlag,
SkCanvas::kARGB_ClipLayer_SaveFlag,
SkCanvas::kARGB_NoClipLayer_SaveFlag,
};
REPORTER_ASSERT(reporter, sizeof(clipOps) == sizeof(flags));
const int layerCombinations = sizeof(flags) / sizeof(SkCanvas::SaveFlags);
SkBitmap bitmaps[2];
for (int i = 0; i < 2; ++i) {
bitmaps[i].allocN32Pixels(WIDTH, HEIGHT);
SkCanvas canvas(bitmaps[i]);
canvas.drawColor(SK_ColorRED);
SkRegion localRegion = clipRegion;
for (int j = 0; j < layerCombinations; ++j) {
SkRect layerBounds = SkRect::Make(layerRect);
canvas.saveLayerAlpha(&layerBounds, 128, flags[j]);
SkCanvasState* state = NULL;
SkCanvas* tmpCanvas = NULL;
if (i) {
state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
REPORTER_ASSERT(reporter, state);
tmpCanvas = SkCanvasStateUtils::CreateFromCanvasState(state);
REPORTER_ASSERT(reporter, tmpCanvas);
} else {
tmpCanvas = SkRef(&canvas);
}
tmpCanvas->save();
tmpCanvas->clipRect(SkRect::Make(clipRect), clipOps[j]);
tmpCanvas->drawColor(SK_ColorBLUE);
tmpCanvas->restore();
tmpCanvas->clipRegion(localRegion, clipOps[j]);
tmpCanvas->drawColor(SK_ColorBLUE);
tmpCanvas->unref();
SkCanvasStateUtils::ReleaseCanvasState(state);
canvas.restore();
// translate the canvas and region for the next iteration
canvas.translate(0, SkIntToScalar(2*(layerRect.height() + (SPACER))));
localRegion.translate(0, 2*(layerRect.height() + SPACER));
}
}
// now we memcmp the two bitmaps
REPORTER_ASSERT(reporter, bitmaps[0].getSize() == bitmaps[1].getSize());
REPORTER_ASSERT(reporter, !memcmp(bitmaps[0].getPixels(),
bitmaps[1].getPixels(),
bitmaps[0].getSize()));
}
////////////////////////////////////////////////////////////////////////////////
class TestDrawFilter : public SkDrawFilter {
public:
virtual bool filter(SkPaint*, Type) SK_OVERRIDE { return true; }
};
static void test_draw_filters(skiatest::Reporter* reporter) {
TestDrawFilter drawFilter;
SkBitmapDevice device(SkBitmap::kARGB_8888_Config, 10, 10);
SkCanvas canvas(&device);
canvas.setDrawFilter(&drawFilter);
SkCanvasState* state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
REPORTER_ASSERT(reporter, state);
SkCanvas* tmpCanvas = SkCanvasStateUtils::CreateFromCanvasState(state);
REPORTER_ASSERT(reporter, tmpCanvas);
REPORTER_ASSERT(reporter, NULL != canvas.getDrawFilter());
REPORTER_ASSERT(reporter, NULL == tmpCanvas->getDrawFilter());
tmpCanvas->unref();
SkCanvasStateUtils::ReleaseCanvasState(state);
}
////////////////////////////////////////////////////////////////////////////////
// we need this function to prevent SkError from printing to stdout
static void error_callback(SkError code, void* ctx) {}
static void test_soft_clips(skiatest::Reporter* reporter) {
SkBitmapDevice device(SkBitmap::kARGB_8888_Config, 10, 10);
SkCanvas canvas(&device);
SkRRect roundRect;
roundRect.setOval(SkRect::MakeWH(5, 5));
canvas.clipRRect(roundRect, SkRegion::kIntersect_Op, true);
SkSetErrorCallback(error_callback, NULL);
SkCanvasState* state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
REPORTER_ASSERT(reporter, !state);
REPORTER_ASSERT(reporter, kInvalidOperation_SkError == SkGetLastError());
SkClearLastError();
}
DEF_TEST(CanvasState, reporter) {
test_complex_layers(reporter);
test_complex_clips(reporter);
test_draw_filters(reporter);
test_soft_clips(reporter);
}
|
