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
|
/*
* 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 "Benchmark.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkColorFilterImageFilter.h"
#include "SkColorMatrixFilter.h"
#include "SkGradientShader.h"
#include "SkImageFilter.h"
#include "SkTableColorFilter.h"
// Chains several matrix color filters image filter or several
// table filter image filters and draws a bitmap.
// This bench shows an improvement in performance and memory
// when collapsing matrices or tables is implemented since all
// the passes are collapsed in one.
class BaseImageFilterCollapseBench : public Benchmark {
public:
BaseImageFilterCollapseBench(): fImageFilter(nullptr) {}
~BaseImageFilterCollapseBench() {
SkSafeUnref(fImageFilter);
}
protected:
void doPreDraw(SkColorFilter* colorFilters[], int nFilters) {
// Create a chain of ImageFilters from colorFilters
fImageFilter = nullptr;
for(int i = nFilters; i --> 0;) {
SkAutoTUnref<SkImageFilter> filter(
SkColorFilterImageFilter::Create(colorFilters[i], fImageFilter, nullptr)
);
SkRefCnt_SafeAssign(fImageFilter, filter.get());
}
}
void onDraw(int loops, SkCanvas* canvas) override {
makeBitmap();
for(int i = 0; i < loops; i++) {
SkPaint paint;
paint.setImageFilter(fImageFilter);
canvas->drawBitmap(fBitmap, 0, 0, &paint);
}
}
private:
SkImageFilter* fImageFilter;
SkBitmap fBitmap;
void makeBitmap() {
int W = 400;
int H = 400;
fBitmap.allocN32Pixels(W, H);
fBitmap.eraseColor(SK_ColorTRANSPARENT);
SkCanvas canvas(fBitmap);
SkPaint paint;
SkPoint pts[] = { {0, 0}, {SkIntToScalar(W), SkIntToScalar(H)} };
SkColor colors[] = {
SK_ColorBLACK, SK_ColorGREEN, SK_ColorCYAN,
SK_ColorRED, 0, SK_ColorBLUE, SK_ColorWHITE
};
SkAutoTUnref<SkShader> shader(SkGradientShader::CreateLinear(
pts, colors, nullptr, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode
));
paint.setShader(shader);
canvas.drawPaint(paint);
}
};
class TableCollapseBench: public BaseImageFilterCollapseBench {
public:
virtual ~TableCollapseBench() {}
protected:
virtual const char* onGetName() override {
return "image_filter_collapse_table";
}
virtual void onDelayedSetup() override {
for (int i = 0; i < 256; ++i) {
int n = i >> 5;
table1[i] = (n << 5) | (n << 2) | (n >> 1);
table2[i] = i * i / 255;
float fi = i / 255.0f;
table3[i] = static_cast<uint8_t>(sqrtf(fi) * 255);
}
SkColorFilter* colorFilters[] = {
SkTableColorFilter::Create(table1),
SkTableColorFilter::Create(table2),
SkTableColorFilter::Create(table3),
};
doPreDraw(colorFilters, SK_ARRAY_COUNT(colorFilters));
for(unsigned i = 0; i < SK_ARRAY_COUNT(colorFilters); i++) {
colorFilters[i]->unref();
}
}
private:
uint8_t table1[256], table2[256], table3[256];
};
static SkColorFilter* make_brightness(float amount) {
SkScalar amount255 = SkScalarMul(amount, SkIntToScalar(255));
SkScalar matrix[20] = { 1, 0, 0, 0, amount255,
0, 1, 0, 0, amount255,
0, 0, 1, 0, amount255,
0, 0, 0, 1, 0 };
return SkColorMatrixFilter::Create(matrix);
}
static SkColorFilter* make_grayscale() {
SkScalar matrix[20];
memset(matrix, 0, 20 * sizeof(SkScalar));
matrix[0] = matrix[5] = matrix[10] = 0.2126f;
matrix[1] = matrix[6] = matrix[11] = 0.7152f;
matrix[2] = matrix[7] = matrix[12] = 0.0722f;
matrix[18] = 1.0f;
return SkColorMatrixFilter::Create(matrix);
}
class MatrixCollapseBench: public BaseImageFilterCollapseBench {
public:
virtual ~MatrixCollapseBench() {}
protected:
virtual const char* onGetName() override {
return "image_filter_collapse_matrix";
}
virtual void onDelayedSetup() override {
SkColorFilter* colorFilters[] = {
make_brightness(0.1f),
make_grayscale(),
make_brightness(-0.1f),
};
doPreDraw(colorFilters, SK_ARRAY_COUNT(colorFilters));
for(unsigned i = 0; i < SK_ARRAY_COUNT(colorFilters); i++) {
colorFilters[i]->unref();
}
}
};
DEF_BENCH(return new TableCollapseBench;)
DEF_BENCH(return new MatrixCollapseBench;)
|
