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
|
/*
* 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 "SkPath.h"
static SkCanvas* MakeCanvas(const SkIRect& bounds) {
SkBitmap bm;
bm.setConfig(SkBitmap::kARGB_8888_Config, bounds.width(), bounds.height());
bm.allocPixels();
bm.eraseColor(0);
SkCanvas* canvas = new SkCanvas(bm);
canvas->translate(-SkIntToScalar(bounds.fLeft), -SkIntToScalar(bounds.fTop));
return canvas;
}
static void GetBitmap(const SkCanvas* canvas, SkBitmap* bm) {
*bm = canvas->getDevice()->accessBitmap(false);
}
static void compare_canvas(const SkCanvas* a, const SkCanvas* b) {
SkBitmap bma, bmb;
GetBitmap(a, &bma);
GetBitmap(b, &bmb);
SkASSERT(bma.width() == bmb.width());
SkASSERT(bma.height() == bmb.height());
bma.lockPixels();
bmb.lockPixels();
for (int y = 0; y < bma.height(); ++y) {
const SkPMColor* rowa = bma.getAddr32(0, y);
const SkPMColor* rowb = bmb.getAddr32(0, y);
SkASSERT(!memcmp(rowa, rowb, bma.width() << 2));
for (int x = 1; x < bma.width() - 1; ++x) {
SkASSERT(0xFF000000 == rowa[x]);
SkASSERT(0xFF000000 == rowb[x]);
}
}
}
static void drawRectAsPath(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
SkPath path;
path.addRect(r);
canvas->drawPath(path, p);
}
static void test_maskFromPath(const SkPath& path) {
SkIRect bounds;
path.getBounds().roundOut(&bounds);
SkPaint paint;
paint.setAntiAlias(true);
SkAutoTUnref<SkCanvas> path_canvas(MakeCanvas(bounds));
path_canvas->drawPath(path, paint);
SkAutoTUnref<SkCanvas> rect_canvas(MakeCanvas(bounds));
drawRectAsPath(rect_canvas, path.getBounds(), paint);
compare_canvas(path_canvas, rect_canvas);
}
static void test_mask() {
for (int i = 1; i <= 20; ++i) {
const SkScalar dx = SK_Scalar1 / i;
const SkRect constr = SkRect::MakeWH(dx, SkIntToScalar(2));
for (int n = 2; n < 20; ++n) {
SkPath path;
path.setFillType(SkPath::kEvenOdd_FillType);
SkRect r = constr;
while (r.fRight < SkIntToScalar(4)) {
path.addRect(r);
r.offset(dx, 0);
}
test_maskFromPath(path);
}
}
}
namespace skiagm {
/** Draw a 2px border around the target, then red behind the target;
set the clip to match the target, then draw >> the target in blue.
*/
static void draw (SkCanvas* canvas, SkRect& target, int x, int y) {
SkPaint borderPaint;
borderPaint.setColor(SkColorSetRGB(0x0, 0xDD, 0x0));
borderPaint.setAntiAlias(true);
SkPaint backgroundPaint;
backgroundPaint.setColor(SkColorSetRGB(0xDD, 0x0, 0x0));
backgroundPaint.setAntiAlias(true);
SkPaint foregroundPaint;
foregroundPaint.setColor(SkColorSetRGB(0x0, 0x0, 0xDD));
foregroundPaint.setAntiAlias(true);
canvas->save();
canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
target.inset(SkIntToScalar(-2), SkIntToScalar(-2));
canvas->drawRect(target, borderPaint);
target.inset(SkIntToScalar(2), SkIntToScalar(2));
canvas->drawRect(target, backgroundPaint);
canvas->clipRect(target, SkRegion::kIntersect_Op, true);
target.inset(SkIntToScalar(-4), SkIntToScalar(-4));
canvas->drawRect(target, foregroundPaint);
canvas->restore();
}
static void draw_square (SkCanvas* canvas, int x, int y) {
SkRect target (SkRect::MakeWH(10 * SK_Scalar1, 10 * SK_Scalar1));
draw(canvas, target, x, y);
}
static void draw_column (SkCanvas* canvas, int x, int y) {
SkRect target (SkRect::MakeWH(1 * SK_Scalar1, 10 * SK_Scalar1));
draw(canvas, target, x, y);
}
static void draw_bar (SkCanvas* canvas, int x, int y) {
SkRect target (SkRect::MakeWH(10 * SK_Scalar1, 1 * SK_Scalar1));
draw(canvas, target, x, y);
}
static void draw_rect_tests (SkCanvas* canvas) {
draw_square(canvas, 10, 10);
draw_column(canvas, 30, 10);
draw_bar(canvas, 10, 30);
}
/**
Test a set of clipping problems discovered while writing blitAntiRect,
and test all the code paths through the clipping blitters.
Each region should show as a blue center surrounded by a 2px green
border, with no red.
*/
class AAClipGM : public GM {
public:
AAClipGM() {
}
protected:
virtual SkString onShortName() {
return SkString("aaclip");
}
virtual SkISize onISize() {
return make_isize(640, 480);
}
virtual void onDraw(SkCanvas* canvas) {
if (false) { // avoid bit rot, suppress warning
test_mask();
}
// Initial pixel-boundary-aligned draw
draw_rect_tests(canvas);
// Repeat 4x with .2, .4, .6, .8 px offsets
canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
canvas->translate(SkIntToScalar(50), 0);
draw_rect_tests(canvas);
canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
canvas->translate(SkIntToScalar(50), 0);
draw_rect_tests(canvas);
canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
canvas->translate(SkIntToScalar(50), 0);
draw_rect_tests(canvas);
canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
canvas->translate(SkIntToScalar(50), 0);
draw_rect_tests(canvas);
}
virtual uint32_t onGetFlags() const { return kSkipPipe_Flag; }
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new AAClipGM; }
static GMRegistry reg(MyFactory);
}
|
