imageblurclampmode.cpp 3.6 KB

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  1. /*
  2. * Copyright 2017 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 "gm/gm.h"
  8. #include "include/core/SkCanvas.h"
  9. #include "include/core/SkColor.h"
  10. #include "include/core/SkImage.h"
  11. #include "include/core/SkImageFilter.h"
  12. #include "include/core/SkImageInfo.h"
  13. #include "include/core/SkPaint.h"
  14. #include "include/core/SkRect.h"
  15. #include "include/core/SkRefCnt.h"
  16. #include "include/core/SkScalar.h"
  17. #include "include/core/SkSize.h"
  18. #include "include/core/SkString.h"
  19. #include "include/core/SkSurface.h"
  20. #include "include/effects/SkBlurImageFilter.h"
  21. #include "tools/ToolUtils.h"
  22. #include <initializer_list>
  23. #include <utility>
  24. static sk_sp<SkImage> make_image(SkCanvas* canvas) {
  25. SkImageInfo info = SkImageInfo::MakeN32Premul(250, 200);
  26. auto surface = ToolUtils::makeSurface(canvas, info);
  27. SkCanvas* c = surface->getCanvas();
  28. SkPaint paint;
  29. paint.setAntiAlias(true);
  30. paint.setColor(SK_ColorBLUE);
  31. c->drawRect(SkRect::MakeIWH(info.width(), info.height()), paint);
  32. paint.setColor(SK_ColorGREEN);
  33. c->drawCircle(125, 100, 100, paint);
  34. paint.setColor(SK_ColorRED);
  35. c->drawRect(SkRect::MakeIWH(80, 80), paint);
  36. return surface->makeImageSnapshot();
  37. }
  38. static void draw_image(SkCanvas* canvas, const sk_sp<SkImage> image, sk_sp<SkImageFilter> filter) {
  39. SkAutoCanvasRestore acr(canvas, true);
  40. SkPaint paint;
  41. paint.setImageFilter(std::move(filter));
  42. canvas->translate(SkIntToScalar(30), 0);
  43. canvas->clipRect(SkRect::MakeIWH(image->width(),image->height()));
  44. canvas->drawImage(image, 0, 0, &paint);
  45. }
  46. namespace skiagm {
  47. // This GM draws one rectangle, one green inscribed circle, and one red square
  48. // with different blur settings.
  49. class ImageBlurClampModeGM : public GM {
  50. public:
  51. ImageBlurClampModeGM() {
  52. this->setBGColor(0xFFCCCCCC);
  53. }
  54. protected:
  55. SkString onShortName() override {
  56. return SkString("imageblurclampmode");
  57. }
  58. SkISize onISize() override {
  59. return SkISize::Make(850, 920);
  60. }
  61. bool runAsBench() const override { return true; }
  62. void onDraw(SkCanvas* canvas) override {
  63. sk_sp<SkImage> image(make_image(canvas));
  64. sk_sp<SkImageFilter> filter;
  65. canvas->translate(0, 30);
  66. // Test different kernel size, including the one to launch 2d Gaussian
  67. // blur.
  68. for (auto sigma: { 0.6f, 3.0f, 8.0f, 20.0f }) {
  69. canvas->save();
  70. // x-only blur
  71. filter = SkBlurImageFilter::Make(sigma, 0.0f, nullptr, nullptr,
  72. SkBlurImageFilter::kClamp_TileMode);
  73. draw_image(canvas, image, std::move(filter));
  74. canvas->translate(image->width() + 20, 0);
  75. // y-only blur
  76. filter = SkBlurImageFilter::Make(0.0f, sigma, nullptr, nullptr,
  77. SkBlurImageFilter::kClamp_TileMode);
  78. draw_image(canvas, image, std::move(filter));
  79. canvas->translate(image->width() + 20, 0);
  80. // both directions
  81. filter = SkBlurImageFilter::Make(sigma, sigma, nullptr, nullptr,
  82. SkBlurImageFilter::kClamp_TileMode);
  83. draw_image(canvas, image, std::move(filter));
  84. canvas->translate(image->width() + 20, 0);
  85. canvas->restore();
  86. canvas->translate(0, image->height() + 20);
  87. }
  88. }
  89. private:
  90. typedef GM INHERITED;
  91. };
  92. //////////////////////////////////////////////////////////////////////////////
  93. DEF_GM(return new ImageBlurClampModeGM;)
  94. }