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| 1 /* |
| 2 * Copyright 2015 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 "sk_tool_utils.h" |
| 9 #include "SkBitmapSource.h" |
| 10 #include "SkBlurImageFilter.h" |
| 11 #include "SkColor.h" |
| 12 #include "SkDisplacementMapEffect.h" |
| 13 #include "SkDropShadowImageFilter.h" |
| 14 #include "SkGradientShader.h" |
| 15 #include "SkMorphologyImageFilter.h" |
| 16 #include "SkScalar.h" |
| 17 #include "gm.h" |
| 18 |
| 19 namespace skiagm { |
| 20 |
| 21 // This GM draws image filters with a CTM containing shearing / rotation. |
| 22 // It checks that the scale portion of the CTM is correctly extracted |
| 23 // and applied to the image inputs separately from the non-scale portion. |
| 24 |
| 25 class ImageFiltersTransformedGM : public GM { |
| 26 public: |
| 27 ImageFiltersTransformedGM() { |
| 28 this->setBGColor(SK_ColorBLACK); |
| 29 } |
| 30 |
| 31 protected: |
| 32 |
| 33 SkString onShortName() SK_OVERRIDE { return SkString("imagefilterstransforme
d"); } |
| 34 |
| 35 SkISize onISize() SK_OVERRIDE { return SkISize::Make(420, 240); } |
| 36 |
| 37 void makeGradientCircle(int width, int height) { |
| 38 SkScalar x = SkIntToScalar(width / 2); |
| 39 SkScalar y = SkIntToScalar(height / 2); |
| 40 SkScalar radius = SkMinScalar(x, y) * 0.8f; |
| 41 fGradientCircle.allocN32Pixels(width, height); |
| 42 SkCanvas canvas(fGradientCircle); |
| 43 canvas.clear(0x00000000); |
| 44 SkColor colors[2]; |
| 45 colors[0] = SK_ColorWHITE; |
| 46 colors[1] = SK_ColorBLACK; |
| 47 SkAutoTUnref<SkShader> shader( |
| 48 SkGradientShader::CreateRadial(SkPoint::Make(x, y), radius, colors,
NULL, 2, |
| 49 SkShader::kClamp_TileMode) |
| 50 ); |
| 51 SkPaint paint; |
| 52 paint.setShader(shader); |
| 53 canvas.drawCircle(x, y, radius, paint); |
| 54 } |
| 55 |
| 56 void onOnceBeforeDraw() SK_OVERRIDE { |
| 57 fCheckerboard.allocN32Pixels(64, 64); |
| 58 SkCanvas checkerboardCanvas(fCheckerboard); |
| 59 sk_tool_utils::draw_checkerboard(&checkerboardCanvas, 0xFFA0A0A0, 0xFF40
4040, 8); |
| 60 |
| 61 this->makeGradientCircle(64, 64); |
| 62 } |
| 63 |
| 64 void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 65 SkAutoTUnref<SkImageFilter> gradient(SkBitmapSource::Create(fGradientCir
cle)); |
| 66 SkAutoTUnref<SkImageFilter> checkerboard(SkBitmapSource::Create(fChecker
board)); |
| 67 SkImageFilter* filters[] = { |
| 68 SkBlurImageFilter::Create(12, 0), |
| 69 SkDropShadowImageFilter::Create(0, 15, 8, 0, SK_ColorGREEN, |
| 70 SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode), |
| 71 SkDisplacementMapEffect::Create(SkDisplacementMapEffect::kR_ChannelS
electorType, |
| 72 SkDisplacementMapEffect::kR_ChannelS
electorType, |
| 73 12, |
| 74 gradient.get(), |
| 75 checkerboard.get()), |
| 76 SkDilateImageFilter::Create(2, 2, checkerboard.get()), |
| 77 SkErodeImageFilter::Create(2, 2, checkerboard.get()), |
| 78 }; |
| 79 |
| 80 const SkScalar margin = SkIntToScalar(20); |
| 81 const SkScalar size = SkIntToScalar(60); |
| 82 |
| 83 for (size_t j = 0; j < 3; j++) { |
| 84 canvas->save(); |
| 85 canvas->translate(margin, 0); |
| 86 for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) { |
| 87 SkPaint paint; |
| 88 paint.setColor(SK_ColorWHITE); |
| 89 paint.setImageFilter(filters[i]); |
| 90 paint.setAntiAlias(true); |
| 91 canvas->save(); |
| 92 canvas->translate(size * SK_ScalarHalf, size * SK_ScalarHalf); |
| 93 canvas->scale(SkDoubleToScalar(0.8), SkDoubleToScalar(0.8)); |
| 94 if (j == 1) { |
| 95 canvas->rotate(SkIntToScalar(45)); |
| 96 } else if (j == 2) { |
| 97 canvas->skew(SkDoubleToScalar(0.5), SkDoubleToScalar(0.2)); |
| 98 } |
| 99 canvas->translate(-size * SK_ScalarHalf, -size * SK_ScalarHalf); |
| 100 canvas->drawOval(SkRect::MakeXYWH(0, size * SkDoubleToScalar(0.1
), |
| 101 size, size * SkDoubleToScalar(
0.6)), paint); |
| 102 canvas->restore(); |
| 103 canvas->translate(size + margin, 0); |
| 104 } |
| 105 canvas->restore(); |
| 106 canvas->translate(0, size + margin); |
| 107 } |
| 108 |
| 109 for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) { |
| 110 SkSafeUnref(filters[i]); |
| 111 } |
| 112 } |
| 113 |
| 114 private: |
| 115 SkBitmap fCheckerboard; |
| 116 SkBitmap fGradientCircle; |
| 117 typedef GM INHERITED; |
| 118 }; |
| 119 |
| 120 ////////////////////////////////////////////////////////////////////////////// |
| 121 |
| 122 DEF_GM( return new ImageFiltersTransformedGM; ) |
| 123 |
| 124 } |
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