ImageFilterCollapse.cpp 4.1 KB

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  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. #include "bench/Benchmark.h"
  8. #include "include/core/SkBitmap.h"
  9. #include "include/core/SkCanvas.h"
  10. #include "include/core/SkImageFilter.h"
  11. #include "include/effects/SkColorFilterImageFilter.h"
  12. #include "include/effects/SkColorMatrixFilter.h"
  13. #include "include/effects/SkGradientShader.h"
  14. #include "include/effects/SkTableColorFilter.h"
  15. // Chains several matrix color filters image filter or several
  16. // table filter image filters and draws a bitmap.
  17. // This bench shows an improvement in performance and memory
  18. // when collapsing matrices or tables is implemented since all
  19. // the passes are collapsed in one.
  20. class BaseImageFilterCollapseBench : public Benchmark {
  21. public:
  22. BaseImageFilterCollapseBench() {}
  23. protected:
  24. void doPreDraw(sk_sp<SkColorFilter> colorFilters[], int nFilters) {
  25. SkASSERT(!fImageFilter);
  26. // Create a chain of ImageFilters from colorFilters
  27. for(int i = nFilters; i --> 0;) {
  28. fImageFilter = SkColorFilterImageFilter::Make(colorFilters[i], fImageFilter);
  29. }
  30. }
  31. void onDraw(int loops, SkCanvas* canvas) override {
  32. makeBitmap();
  33. for(int i = 0; i < loops; i++) {
  34. SkPaint paint;
  35. paint.setImageFilter(fImageFilter);
  36. canvas->drawBitmap(fBitmap, 0, 0, &paint);
  37. }
  38. }
  39. private:
  40. sk_sp<SkImageFilter> fImageFilter;
  41. SkBitmap fBitmap;
  42. void makeBitmap() {
  43. int W = 400;
  44. int H = 400;
  45. fBitmap.allocN32Pixels(W, H);
  46. fBitmap.eraseColor(SK_ColorTRANSPARENT);
  47. SkCanvas canvas(fBitmap);
  48. SkPaint paint;
  49. SkPoint pts[] = { {0, 0}, {SkIntToScalar(W), SkIntToScalar(H)} };
  50. SkColor colors[] = {
  51. SK_ColorBLACK, SK_ColorGREEN, SK_ColorCYAN,
  52. SK_ColorRED, 0, SK_ColorBLUE, SK_ColorWHITE
  53. };
  54. paint.setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors),
  55. SkTileMode::kClamp));
  56. canvas.drawPaint(paint);
  57. }
  58. };
  59. class TableCollapseBench: public BaseImageFilterCollapseBench {
  60. protected:
  61. const char* onGetName() override {
  62. return "image_filter_collapse_table";
  63. }
  64. void onDelayedSetup() override {
  65. for (int i = 0; i < 256; ++i) {
  66. int n = i >> 5;
  67. table1[i] = (n << 5) | (n << 2) | (n >> 1);
  68. table2[i] = i * i / 255;
  69. float fi = i / 255.0f;
  70. table3[i] = static_cast<uint8_t>(sqrtf(fi) * 255);
  71. }
  72. sk_sp<SkColorFilter> colorFilters[] = {
  73. SkTableColorFilter::Make(table1),
  74. SkTableColorFilter::Make(table2),
  75. SkTableColorFilter::Make(table3),
  76. };
  77. this->doPreDraw(colorFilters, SK_ARRAY_COUNT(colorFilters));
  78. }
  79. private:
  80. uint8_t table1[256], table2[256], table3[256];
  81. };
  82. static sk_sp<SkColorFilter> make_brightness(float amount) {
  83. SkScalar matrix[20] = { 1, 0, 0, 0, amount,
  84. 0, 1, 0, 0, amount,
  85. 0, 0, 1, 0, amount,
  86. 0, 0, 0, 1, 0 };
  87. return SkColorFilters::Matrix(matrix);
  88. }
  89. static sk_sp<SkColorFilter> make_grayscale() {
  90. float matrix[20];
  91. memset(matrix, 0, 20 * sizeof(float));
  92. matrix[0] = matrix[5] = matrix[10] = 0.2126f;
  93. matrix[1] = matrix[6] = matrix[11] = 0.7152f;
  94. matrix[2] = matrix[7] = matrix[12] = 0.0722f;
  95. matrix[18] = 1.0f;
  96. return SkColorFilters::Matrix(matrix);
  97. }
  98. class MatrixCollapseBench: public BaseImageFilterCollapseBench {
  99. protected:
  100. const char* onGetName() override {
  101. return "image_filter_collapse_matrix";
  102. }
  103. void onDelayedSetup() override {
  104. sk_sp<SkColorFilter> colorFilters[] = {
  105. make_brightness(0.1f),
  106. make_grayscale(),
  107. make_brightness(-0.1f),
  108. };
  109. this->doPreDraw(colorFilters, SK_ARRAY_COUNT(colorFilters));
  110. }
  111. };
  112. DEF_BENCH(return new TableCollapseBench;)
  113. DEF_BENCH(return new MatrixCollapseBench;)