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 23class BaseImageFilterCollapseBench : public Benchmark { 24public: 25 BaseImageFilterCollapseBench(): fImageFilter(NULL) {} 26 ~BaseImageFilterCollapseBench() { 27 SkSafeUnref(fImageFilter); 28 } 29 30protected: 31 void doPreDraw(SkColorFilter* colorFilters[], int nFilters) { 32 // Create a chain of ImageFilters from colorFilters 33 fImageFilter = NULL; 34 for(int i = nFilters; i --> 0;) { 35 SkAutoTUnref<SkImageFilter> filter( 36 SkColorFilterImageFilter::Create(colorFilters[i], fImageFilter, NULL) 37 ); 38 SkRefCnt_SafeAssign(fImageFilter, filter.get()); 39 } 40 } 41 42 void onDraw(const 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 52private: 53 SkImageFilter* fImageFilter; 54 SkBitmap fBitmap; 55 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, NULL, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode 71 )); 72 paint.setShader(shader); 73 canvas.drawPaint(paint); 74 } 75}; 76 77class TableCollapseBench: public BaseImageFilterCollapseBench { 78public: 79 virtual ~TableCollapseBench() {} 80 81protected: 82 virtual const char* onGetName() override { 83 return "image_filter_collapse_table"; 84 } 85 86 virtual void onPreDraw() 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 110private: 111 uint8_t table1[256], table2[256], table3[256]; 112}; 113 114static 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 123static 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 133class MatrixCollapseBench: public BaseImageFilterCollapseBench { 134public: 135 virtual ~MatrixCollapseBench() {} 136 137protected: 138 virtual const char* onGetName() override { 139 return "image_filter_collapse_matrix"; 140 } 141 142 virtual void onPreDraw() 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 157DEF_BENCH(return new TableCollapseBench;) 158DEF_BENCH(return new MatrixCollapseBench;) 159