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
248
249
250
251
252
253
254
255
256
257
258
259
|
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package draw
import (
"image"
"image/color"
"reflect"
"testing"
)
const (
dstw, dsth = 640, 480
srcw, srch = 400, 300
)
var palette = color.Palette{
color.Black,
color.White,
}
// bench benchmarks drawing src and mask images onto a dst image with the
// given op and the color models to create those images from.
// The created images' pixels are initialized to non-zero values.
func bench(b *testing.B, dcm, scm, mcm color.Model, op Op) {
b.StopTimer()
var dst Image
switch dcm {
case color.RGBAModel:
dst1 := image.NewRGBA(image.Rect(0, 0, dstw, dsth))
for y := 0; y < dsth; y++ {
for x := 0; x < dstw; x++ {
dst1.SetRGBA(x, y, color.RGBA{
uint8(5 * x % 0x100),
uint8(7 * y % 0x100),
uint8((7*x + 5*y) % 0x100),
0xff,
})
}
}
dst = dst1
case color.RGBA64Model:
dst1 := image.NewRGBA64(image.Rect(0, 0, dstw, dsth))
for y := 0; y < dsth; y++ {
for x := 0; x < dstw; x++ {
dst1.SetRGBA64(x, y, color.RGBA64{
uint16(53 * x % 0x10000),
uint16(59 * y % 0x10000),
uint16((59*x + 53*y) % 0x10000),
0xffff,
})
}
}
dst = dst1
default:
// The == operator isn't defined on a color.Palette (a slice), so we
// use reflection.
if reflect.DeepEqual(dcm, palette) {
dst1 := image.NewPaletted(image.Rect(0, 0, dstw, dsth), palette)
for y := 0; y < dsth; y++ {
for x := 0; x < dstw; x++ {
dst1.SetColorIndex(x, y, uint8(x^y)&1)
}
}
dst = dst1
} else {
b.Fatal("unknown destination color model", dcm)
}
}
var src image.Image
switch scm {
case nil:
src = &image.Uniform{C: color.RGBA{0x11, 0x22, 0x33, 0x44}}
case color.CMYKModel:
src1 := image.NewCMYK(image.Rect(0, 0, srcw, srch))
for y := 0; y < srch; y++ {
for x := 0; x < srcw; x++ {
src1.SetCMYK(x, y, color.CMYK{
uint8(13 * x % 0x100),
uint8(11 * y % 0x100),
uint8((11*x + 13*y) % 0x100),
uint8((31*x + 37*y) % 0x100),
})
}
}
src = src1
case color.GrayModel:
src1 := image.NewGray(image.Rect(0, 0, srcw, srch))
for y := 0; y < srch; y++ {
for x := 0; x < srcw; x++ {
src1.SetGray(x, y, color.Gray{
uint8((11*x + 13*y) % 0x100),
})
}
}
src = src1
case color.RGBAModel:
src1 := image.NewRGBA(image.Rect(0, 0, srcw, srch))
for y := 0; y < srch; y++ {
for x := 0; x < srcw; x++ {
src1.SetRGBA(x, y, color.RGBA{
uint8(13 * x % 0x80),
uint8(11 * y % 0x80),
uint8((11*x + 13*y) % 0x80),
0x7f,
})
}
}
src = src1
case color.RGBA64Model:
src1 := image.NewRGBA64(image.Rect(0, 0, srcw, srch))
for y := 0; y < srch; y++ {
for x := 0; x < srcw; x++ {
src1.SetRGBA64(x, y, color.RGBA64{
uint16(103 * x % 0x8000),
uint16(101 * y % 0x8000),
uint16((101*x + 103*y) % 0x8000),
0x7fff,
})
}
}
src = src1
case color.NRGBAModel:
src1 := image.NewNRGBA(image.Rect(0, 0, srcw, srch))
for y := 0; y < srch; y++ {
for x := 0; x < srcw; x++ {
src1.SetNRGBA(x, y, color.NRGBA{
uint8(13 * x % 0x100),
uint8(11 * y % 0x100),
uint8((11*x + 13*y) % 0x100),
0x7f,
})
}
}
src = src1
case color.YCbCrModel:
yy := make([]uint8, srcw*srch)
cb := make([]uint8, srcw*srch)
cr := make([]uint8, srcw*srch)
for i := range yy {
yy[i] = uint8(3 * i % 0x100)
cb[i] = uint8(5 * i % 0x100)
cr[i] = uint8(7 * i % 0x100)
}
src = &image.YCbCr{
Y: yy,
Cb: cb,
Cr: cr,
YStride: srcw,
CStride: srcw,
SubsampleRatio: image.YCbCrSubsampleRatio444,
Rect: image.Rect(0, 0, srcw, srch),
}
default:
b.Fatal("unknown source color model", scm)
}
var mask image.Image
switch mcm {
case nil:
// No-op.
case color.AlphaModel:
mask1 := image.NewAlpha(image.Rect(0, 0, srcw, srch))
for y := 0; y < srch; y++ {
for x := 0; x < srcw; x++ {
a := uint8((23*x + 29*y) % 0x100)
// Glyph masks are typically mostly zero,
// so we only set a quarter of mask1's pixels.
if a >= 0xc0 {
mask1.SetAlpha(x, y, color.Alpha{a})
}
}
}
mask = mask1
default:
b.Fatal("unknown mask color model", mcm)
}
b.StartTimer()
for i := 0; i < b.N; i++ {
// Scatter the destination rectangle to draw into.
x := 3 * i % (dstw - srcw)
y := 7 * i % (dsth - srch)
DrawMask(dst, dst.Bounds().Add(image.Pt(x, y)), src, image.ZP, mask, image.ZP, op)
}
}
// The BenchmarkFoo functions exercise a drawFoo fast-path function in draw.go.
func BenchmarkFillOver(b *testing.B) {
bench(b, color.RGBAModel, nil, nil, Over)
}
func BenchmarkFillSrc(b *testing.B) {
bench(b, color.RGBAModel, nil, nil, Src)
}
func BenchmarkCopyOver(b *testing.B) {
bench(b, color.RGBAModel, color.RGBAModel, nil, Over)
}
func BenchmarkCopySrc(b *testing.B) {
bench(b, color.RGBAModel, color.RGBAModel, nil, Src)
}
func BenchmarkNRGBAOver(b *testing.B) {
bench(b, color.RGBAModel, color.NRGBAModel, nil, Over)
}
func BenchmarkNRGBASrc(b *testing.B) {
bench(b, color.RGBAModel, color.NRGBAModel, nil, Src)
}
func BenchmarkYCbCr(b *testing.B) {
bench(b, color.RGBAModel, color.YCbCrModel, nil, Over)
}
func BenchmarkGray(b *testing.B) {
bench(b, color.RGBAModel, color.GrayModel, nil, Over)
}
func BenchmarkCMYK(b *testing.B) {
bench(b, color.RGBAModel, color.CMYKModel, nil, Over)
}
func BenchmarkGlyphOver(b *testing.B) {
bench(b, color.RGBAModel, nil, color.AlphaModel, Over)
}
func BenchmarkRGBA(b *testing.B) {
bench(b, color.RGBAModel, color.RGBA64Model, nil, Src)
}
func BenchmarkPaletted(b *testing.B) {
bench(b, palette, color.RGBAModel, nil, Src)
}
// The BenchmarkGenericFoo functions exercise the generic, slow-path code.
func BenchmarkGenericOver(b *testing.B) {
bench(b, color.RGBA64Model, color.RGBA64Model, nil, Over)
}
func BenchmarkGenericMaskOver(b *testing.B) {
bench(b, color.RGBA64Model, color.RGBA64Model, color.AlphaModel, Over)
}
func BenchmarkGenericSrc(b *testing.B) {
bench(b, color.RGBA64Model, color.RGBA64Model, nil, Src)
}
func BenchmarkGenericMaskSrc(b *testing.B) {
bench(b, color.RGBA64Model, color.RGBA64Model, color.AlphaModel, Src)
}
|
