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
|
/*
* Copyright 2014 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 "SampleCode.h"
#include "SkRandom.h"
#include "SkUtils.h"
#if SK_SUPPORT_GPU
#include "GrRectanizer_pow2.h"
#include "GrRectanizer_skyline.h"
// This slide visualizes the various GrRectanizer-derived classes behavior
// for various input sets
// 'j' will cycle through the various rectanizers
// Pow2 -> GrRectanizerPow2
// Skyline -> GrRectanizerSkyline
// 'h' will cycle through the various rect sets
// Rand -> random rects from 2-256
// Pow2Rand -> random power of 2 sized rects from 2-256
// SmallPow2 -> 128x128 rects
class RectanizerView : public SampleView {
public:
RectanizerView()
: fCurRandRect(0) {
for (int i = 0; i < 3; ++i) {
fRects[i].setReserve(kNumRandRects);
}
fRectLocations.setReserve(kNumRandRects);
SkRandom random;
for (int i = 0; i < kNumRandRects; ++i) {
*fRects[0].append() = SkISize::Make(random.nextRangeU(kMinRectSize, kMaxRectSize),
random.nextRangeU(kMinRectSize, kMaxRectSize));
*fRects[1].append() = SkISize::Make(
GrNextPow2(random.nextRangeU(kMinRectSize, kMaxRectSize)),
GrNextPow2(random.nextRangeU(kMinRectSize, kMaxRectSize)));
*fRects[2].append() = SkISize::Make(128, 128);
*fRectLocations.append() = SkIPoint16::Make(0, 0);
}
fCurRects = &fRects[0];
fRectanizers[0] = new GrRectanizerPow2(kWidth, kHeight);
fRectanizers[1] = new GrRectanizerSkyline(kWidth, kHeight);
fCurRectanizer = fRectanizers[0];
}
protected:
bool onQuery(SkEvent* evt) override {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "Rectanizer");
return true;
}
SkUnichar uni;
if (SampleCode::CharQ(*evt, &uni)) {
char utf8[kMaxBytesInUTF8Sequence];
size_t size = SkUTF8_FromUnichar(uni, utf8);
// Only consider events for single char keys
if (1 == size) {
switch (utf8[0]) {
case kCycleRectanizerKey:
this->cycleRectanizer();
return true;
case kCycleRectsKey:
this->cycleRects();
return true;
default:
break;
}
}
}
return this->INHERITED::onQuery(evt);
}
void onDrawContent(SkCanvas* canvas) override {
if (fCurRandRect < kNumRandRects) {
if (fCurRectanizer->addRect((*fCurRects)[fCurRandRect].fWidth,
(*fCurRects)[fCurRandRect].fHeight,
&fRectLocations[fCurRandRect])) {
++fCurRandRect;
}
}
SkPaint blackBigFont;
blackBigFont.setTextSize(20);
SkPaint blackStroke;
blackStroke.setStyle(SkPaint::kStroke_Style);
SkPaint redFill;
redFill.setColor(SK_ColorRED);
SkRect r = SkRect::MakeWH(SkIntToScalar(kWidth), SkIntToScalar(kHeight));
canvas->clear(SK_ColorWHITE);
canvas->drawRect(r, blackStroke);
long totArea = 0;
for (int i = 0; i < fCurRandRect; ++i) {
r = SkRect::MakeXYWH(SkIntToScalar(fRectLocations[i].fX),
SkIntToScalar(fRectLocations[i].fY),
SkIntToScalar((*fCurRects)[i].fWidth),
SkIntToScalar((*fCurRects)[i].fHeight));
canvas->drawRect(r, redFill);
canvas->drawRect(r, blackStroke);
totArea += (*fCurRects)[i].fWidth * (*fCurRects)[i].fHeight;
}
SkString str;
str.printf("%s-%s: tot Area: %ld %%full: %.2f (%.2f) numTextures: %d/%d",
this->getRectanizerName(),
this->getRectsName(),
totArea,
100.0f * fCurRectanizer->percentFull(),
100.0f * totArea / ((float)kWidth*kHeight),
fCurRandRect,
kNumRandRects);
canvas->drawString(str, 50, kHeight + 50, blackBigFont);
str.printf("Press \'j\' to toggle rectanizer");
canvas->drawString(str, 50, kHeight + 100, blackBigFont);
str.printf("Press \'h\' to toggle rects");
canvas->drawString(str, 50, kHeight + 150, blackBigFont);
this->inval(nullptr);
}
private:
static const int kWidth = 1024;
static const int kHeight = 1024;
static const int kNumRandRects = 200;
static const char kCycleRectanizerKey = 'j';
static const char kCycleRectsKey = 'h';
static const int kMinRectSize = 2;
static const int kMaxRectSize = 256;
int fCurRandRect;
SkTDArray<SkISize> fRects[3];
SkTDArray<SkISize>* fCurRects;
SkTDArray<SkIPoint16> fRectLocations;
GrRectanizer* fRectanizers[2];
GrRectanizer* fCurRectanizer;
const char* getRectanizerName() const {
if (fCurRectanizer == fRectanizers[0]) {
return "Pow2";
} else {
return "Skyline";
}
}
void cycleRectanizer() {
if (fCurRectanizer == fRectanizers[0]) {
fCurRectanizer = fRectanizers[1];
} else {
fCurRectanizer = fRectanizers[0];
}
fCurRectanizer->reset();
fCurRandRect = 0;
}
const char* getRectsName() const {
if (fCurRects == &fRects[0]) {
return "Rand";
} else if (fCurRects == &fRects[1]) {
return "Pow2Rand";
} else {
return "SmallPow2";
}
}
void cycleRects() {
if (fCurRects == &fRects[0]) {
fCurRects = &fRects[1];
} else if (fCurRects == &fRects[1]) {
fCurRects = &fRects[2];
} else {
fCurRects = &fRects[0];
}
fCurRectanizer->reset();
fCurRandRect = 0;
}
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new RectanizerView; }
static SkViewRegister reg(MyFactory);
#endif
|
