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 "Benchmark.h"
9 #include "SkBitmap.h"
10 #include "SkCanvas.h"
11 #include "SkColorFilterImageFilter.h"
12 #include "SkColorMatrixFilter.h"
13 #include "SkGradientShader.h"
14 #include "SkImageFilter.h"
15 #include "SkTableColorFilter.h"
16
17 // Chains several matrix color filters image filter or several
18 // table filter image filters and draws a bitmap.
19 // This bench shows an improvement in performance and memory
20 // when collapsing matrices or tables is implemented since all
21 // the passes are collapsed in one.
22
23 class BaseImageFilterCollapseBench : public Benchmark {
24 public:
BaseImageFilterCollapseBench()25 BaseImageFilterCollapseBench(): fImageFilter(nullptr) {}
~BaseImageFilterCollapseBench()26 ~BaseImageFilterCollapseBench() {
27 SkSafeUnref(fImageFilter);
28 }
29
30 protected:
doPreDraw(SkColorFilter * colorFilters[],int nFilters)31 void doPreDraw(SkColorFilter* colorFilters[], int nFilters) {
32 // Create a chain of ImageFilters from colorFilters
33 fImageFilter = nullptr;
34 for(int i = nFilters; i --> 0;) {
35 SkAutoTUnref<SkImageFilter> filter(
36 SkColorFilterImageFilter::Create(colorFilters[i], fImageFilter, nullptr)
37 );
38 SkRefCnt_SafeAssign(fImageFilter, filter.get());
39 }
40 }
41
onDraw(int loops,SkCanvas * canvas)42 void onDraw(int loops, SkCanvas* canvas) override {
43 makeBitmap();
44
45 for(int i = 0; i < loops; i++) {
46 SkPaint paint;
47 paint.setImageFilter(fImageFilter);
48 canvas->drawBitmap(fBitmap, 0, 0, &paint);
49 }
50 }
51
52 private:
53 SkImageFilter* fImageFilter;
54 SkBitmap fBitmap;
55
makeBitmap()56 void makeBitmap() {
57 int W = 400;
58 int H = 400;
59 fBitmap.allocN32Pixels(W, H);
60 fBitmap.eraseColor(SK_ColorTRANSPARENT);
61
62 SkCanvas canvas(fBitmap);
63 SkPaint paint;
64 SkPoint pts[] = { {0, 0}, {SkIntToScalar(W), SkIntToScalar(H)} };
65 SkColor colors[] = {
66 SK_ColorBLACK, SK_ColorGREEN, SK_ColorCYAN,
67 SK_ColorRED, 0, SK_ColorBLUE, SK_ColorWHITE
68 };
69 SkAutoTUnref<SkShader> shader(SkGradientShader::CreateLinear(
70 pts, colors, nullptr, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode
71 ));
72 paint.setShader(shader);
73 canvas.drawPaint(paint);
74 }
75 };
76
77 class TableCollapseBench: public BaseImageFilterCollapseBench {
78 public:
~TableCollapseBench()79 virtual ~TableCollapseBench() {}
80
81 protected:
onGetName()82 virtual const char* onGetName() override {
83 return "image_filter_collapse_table";
84 }
85
onDelayedSetup()86 virtual void onDelayedSetup() override {
87 for (int i = 0; i < 256; ++i) {
88 int n = i >> 5;
89 table1[i] = (n << 5) | (n << 2) | (n >> 1);
90
91 table2[i] = i * i / 255;
92
93 float fi = i / 255.0f;
94 table3[i] = static_cast<uint8_t>(sqrtf(fi) * 255);
95 }
96
97 SkColorFilter* colorFilters[] = {
98 SkTableColorFilter::Create(table1),
99 SkTableColorFilter::Create(table2),
100 SkTableColorFilter::Create(table3),
101 };
102
103 doPreDraw(colorFilters, SK_ARRAY_COUNT(colorFilters));
104
105 for(unsigned i = 0; i < SK_ARRAY_COUNT(colorFilters); i++) {
106 colorFilters[i]->unref();
107 }
108 }
109
110 private:
111 uint8_t table1[256], table2[256], table3[256];
112 };
113
make_brightness(float amount)114 static SkColorFilter* make_brightness(float amount) {
115 SkScalar amount255 = SkScalarMul(amount, SkIntToScalar(255));
116 SkScalar matrix[20] = { 1, 0, 0, 0, amount255,
117 0, 1, 0, 0, amount255,
118 0, 0, 1, 0, amount255,
119 0, 0, 0, 1, 0 };
120 return SkColorMatrixFilter::Create(matrix);
121 }
122
make_grayscale()123 static SkColorFilter* make_grayscale() {
124 SkScalar matrix[20];
125 memset(matrix, 0, 20 * sizeof(SkScalar));
126 matrix[0] = matrix[5] = matrix[10] = 0.2126f;
127 matrix[1] = matrix[6] = matrix[11] = 0.7152f;
128 matrix[2] = matrix[7] = matrix[12] = 0.0722f;
129 matrix[18] = 1.0f;
130 return SkColorMatrixFilter::Create(matrix);
131 }
132
133 class MatrixCollapseBench: public BaseImageFilterCollapseBench {
134 public:
~MatrixCollapseBench()135 virtual ~MatrixCollapseBench() {}
136
137 protected:
onGetName()138 virtual const char* onGetName() override {
139 return "image_filter_collapse_matrix";
140 }
141
onDelayedSetup()142 virtual void onDelayedSetup() override {
143 SkColorFilter* colorFilters[] = {
144 make_brightness(0.1f),
145 make_grayscale(),
146 make_brightness(-0.1f),
147 };
148
149 doPreDraw(colorFilters, SK_ARRAY_COUNT(colorFilters));
150
151 for(unsigned i = 0; i < SK_ARRAY_COUNT(colorFilters); i++) {
152 colorFilters[i]->unref();
153 }
154 }
155 };
156
157 DEF_BENCH(return new TableCollapseBench;)
158 DEF_BENCH(return new MatrixCollapseBench;)
159