1 /*
2 * Copyright 2014 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "bench/Benchmark.h"
9 #include "include/core/SkBitmap.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkImageFilter.h"
12 #include "include/core/SkSurface.h"
13 #include "include/effects/SkColorMatrixFilter.h"
14 #include "include/effects/SkGradientShader.h"
15 #include "include/effects/SkImageFilters.h"
16 #include "include/effects/SkTableColorFilter.h"
17
18 // Chains several matrix color filters image filter or several
19 // table filter image filters and draws a bitmap.
20 // This bench shows an improvement in performance and memory
21 // when collapsing matrices or tables is implemented since all
22 // the passes are collapsed in one.
23
24 class BaseImageFilterCollapseBench : public Benchmark {
25 public:
BaseImageFilterCollapseBench()26 BaseImageFilterCollapseBench() {}
27
28 protected:
doPreDraw(sk_sp<SkColorFilter> colorFilters[],int nFilters)29 void doPreDraw(sk_sp<SkColorFilter> colorFilters[], int nFilters) {
30 SkASSERT(!fImageFilter);
31
32 // Create a chain of ImageFilters from colorFilters
33 for(int i = nFilters; i --> 0;) {
34 fImageFilter = SkImageFilters::ColorFilter(colorFilters[i], fImageFilter);
35 }
36 }
37
onDraw(int loops,SkCanvas * canvas)38 void onDraw(int loops, SkCanvas* canvas) override {
39 makeBitmap();
40
41 for(int i = 0; i < loops; i++) {
42 SkPaint paint;
43 paint.setImageFilter(fImageFilter);
44 canvas->drawImage(fImage, 0, 0, SkSamplingOptions(), &paint);
45 }
46 }
47
48 private:
49 sk_sp<SkImageFilter> fImageFilter;
50 sk_sp<SkImage> fImage;
51
makeBitmap()52 void makeBitmap() {
53 int W = 400;
54 int H = 400;
55 auto surf = SkSurface::MakeRasterN32Premul(W, H);
56
57 SkPaint paint;
58 SkPoint pts[] = { {0, 0}, {SkIntToScalar(W), SkIntToScalar(H)} };
59 SkColor colors[] = {
60 SK_ColorBLACK, SK_ColorGREEN, SK_ColorCYAN,
61 SK_ColorRED, 0, SK_ColorBLUE, SK_ColorWHITE
62 };
63 paint.setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors),
64 SkTileMode::kClamp));
65 surf->getCanvas()->drawPaint(paint);
66 fImage = surf->makeImageSnapshot(); // shader->makeImage()
67 }
68 };
69
70 class TableCollapseBench: public BaseImageFilterCollapseBench {
71 protected:
onGetName()72 const char* onGetName() override {
73 return "image_filter_collapse_table";
74 }
75
onDelayedSetup()76 void onDelayedSetup() override {
77 for (int i = 0; i < 256; ++i) {
78 int n = i >> 5;
79 table1[i] = (n << 5) | (n << 2) | (n >> 1);
80
81 table2[i] = i * i / 255;
82
83 float fi = i / 255.0f;
84 table3[i] = static_cast<uint8_t>(sqrtf(fi) * 255);
85 }
86
87 sk_sp<SkColorFilter> colorFilters[] = {
88 SkTableColorFilter::Make(table1),
89 SkTableColorFilter::Make(table2),
90 SkTableColorFilter::Make(table3),
91 };
92
93 this->doPreDraw(colorFilters, SK_ARRAY_COUNT(colorFilters));
94 }
95
96 private:
97 uint8_t table1[256], table2[256], table3[256];
98 };
99
make_brightness(float amount)100 static sk_sp<SkColorFilter> make_brightness(float amount) {
101 SkScalar matrix[20] = { 1, 0, 0, 0, amount,
102 0, 1, 0, 0, amount,
103 0, 0, 1, 0, amount,
104 0, 0, 0, 1, 0 };
105 return SkColorFilters::Matrix(matrix);
106 }
107
make_grayscale()108 static sk_sp<SkColorFilter> make_grayscale() {
109 float matrix[20];
110 memset(matrix, 0, 20 * sizeof(float));
111 matrix[0] = matrix[5] = matrix[10] = 0.2126f;
112 matrix[1] = matrix[6] = matrix[11] = 0.7152f;
113 matrix[2] = matrix[7] = matrix[12] = 0.0722f;
114 matrix[18] = 1.0f;
115 return SkColorFilters::Matrix(matrix);
116 }
117
118 class MatrixCollapseBench: public BaseImageFilterCollapseBench {
119 protected:
onGetName()120 const char* onGetName() override {
121 return "image_filter_collapse_matrix";
122 }
123
onDelayedSetup()124 void onDelayedSetup() override {
125 sk_sp<SkColorFilter> colorFilters[] = {
126 make_brightness(0.1f),
127 make_grayscale(),
128 make_brightness(-0.1f),
129 };
130
131 this->doPreDraw(colorFilters, SK_ARRAY_COUNT(colorFilters));
132 }
133 };
134
135 DEF_BENCH(return new TableCollapseBench;)
136 DEF_BENCH(return new MatrixCollapseBench;)
137