1 /* 2 * Copyright 2012 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 "gm.h" 9 #include "sk_tool_utils.h" 10 11 #include "SkArithmeticImageFilter.h" 12 #include "SkBlurImageFilter.h" 13 #include "SkColorFilter.h" 14 #include "SkColorFilterImageFilter.h" 15 #include "SkColorMatrixFilter.h" 16 #include "SkImage.h" 17 #include "SkImageSource.h" 18 #include "SkMatrixConvolutionImageFilter.h" 19 #include "SkMergeImageFilter.h" 20 #include "SkMorphologyImageFilter.h" 21 #include "SkOffsetImageFilter.h" 22 #include "SkReadBuffer.h" 23 #include "SkSpecialImage.h" 24 #include "SkSpecialSurface.h" 25 #include "SkWriteBuffer.h" 26 #include "SkXfermodeImageFilter.h" 27 28 class ImageFiltersGraphGM : public skiagm::GM { 29 public: 30 ImageFiltersGraphGM() {} 31 32 protected: 33 34 SkString onShortName() override { 35 return SkString("imagefiltersgraph"); 36 } 37 38 SkISize onISize() override { return SkISize::Make(600, 150); } 39 40 void onOnceBeforeDraw() override { 41 fImage = SkImage::MakeFromBitmap( 42 sk_tool_utils::create_string_bitmap(100, 100, SK_ColorWHITE, 20, 70, 96, "e")); 43 } 44 45 void onDraw(SkCanvas* canvas) override { 46 canvas->clear(SK_ColorBLACK); 47 { 48 sk_sp<SkImageFilter> bitmapSource(SkImageSource::Make(fImage)); 49 sk_sp<SkColorFilter> cf(SkColorFilter::MakeModeFilter(SK_ColorRED, 50 SkBlendMode::kSrcIn)); 51 sk_sp<SkImageFilter> blur(SkBlurImageFilter::Make(4.0f, 4.0f, std::move(bitmapSource))); 52 sk_sp<SkImageFilter> erode(SkErodeImageFilter::Make(4, 4, blur)); 53 sk_sp<SkImageFilter> color(SkColorFilterImageFilter::Make(std::move(cf), 54 std::move(erode))); 55 sk_sp<SkImageFilter> merge(SkMergeImageFilter::Make(blur, color)); 56 57 SkPaint paint; 58 paint.setImageFilter(std::move(merge)); 59 canvas->drawPaint(paint); 60 canvas->translate(SkIntToScalar(100), 0); 61 } 62 { 63 sk_sp<SkImageFilter> morph(SkDilateImageFilter::Make(5, 5, nullptr)); 64 65 SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0, 66 0, SK_Scalar1, 0, 0, 0, 67 0, 0, SK_Scalar1, 0, 0, 68 0, 0, 0, 0.5f, 0 }; 69 70 sk_sp<SkColorFilter> matrixFilter(SkColorFilter::MakeMatrixFilterRowMajor255(matrix)); 71 sk_sp<SkImageFilter> colorMorph(SkColorFilterImageFilter::Make(std::move(matrixFilter), 72 std::move(morph))); 73 SkPaint paint; 74 paint.setImageFilter(SkXfermodeImageFilter::Make(SkBlendMode::kSrcOver, 75 std::move(colorMorph))); 76 77 DrawClippedImage(canvas, fImage.get(), paint); 78 canvas->translate(SkIntToScalar(100), 0); 79 } 80 { 81 SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0, 82 0, SK_Scalar1, 0, 0, 0, 83 0, 0, SK_Scalar1, 0, 0, 84 0, 0, 0, 0.5f, 0 }; 85 sk_sp<SkColorFilter> matrixCF(SkColorFilter::MakeMatrixFilterRowMajor255(matrix)); 86 sk_sp<SkImageFilter> matrixFilter(SkColorFilterImageFilter::Make(std::move(matrixCF), 87 nullptr)); 88 sk_sp<SkImageFilter> offsetFilter(SkOffsetImageFilter::Make(10.0f, 10.f, 89 matrixFilter)); 90 91 SkPaint paint; 92 paint.setImageFilter(SkArithmeticImageFilter::Make( 93 0, 1, 1, 0, true, std::move(matrixFilter), std::move(offsetFilter), nullptr)); 94 95 DrawClippedImage(canvas, fImage.get(), paint); 96 canvas->translate(SkIntToScalar(100), 0); 97 } 98 { 99 sk_sp<SkImageFilter> blur(SkBlurImageFilter::Make(SkIntToScalar(10), 100 SkIntToScalar(10), 101 nullptr)); 102 103 SkImageFilter::CropRect cropRect(SkRect::MakeWH(SkIntToScalar(95), SkIntToScalar(100))); 104 SkPaint paint; 105 paint.setImageFilter( 106 SkXfermodeImageFilter::Make(SkBlendMode::kSrcIn, std::move(blur), nullptr, 107 &cropRect)); 108 DrawClippedImage(canvas, fImage.get(), paint); 109 canvas->translate(SkIntToScalar(100), 0); 110 } 111 { 112 // Dilate -> matrix convolution. 113 // This tests that a filter using asFragmentProcessor (matrix 114 // convolution) correctly handles a non-zero source offset 115 // (supplied by the dilate). 116 sk_sp<SkImageFilter> dilate(SkDilateImageFilter::Make(5, 5, nullptr)); 117 118 SkScalar kernel[9] = { 119 SkIntToScalar(-1), SkIntToScalar( -1 ), SkIntToScalar(-1), 120 SkIntToScalar(-1), SkIntToScalar( 7 ), SkIntToScalar(-1), 121 SkIntToScalar(-1), SkIntToScalar( -1 ), SkIntToScalar(-1), 122 }; 123 SkISize kernelSize = SkISize::Make(3, 3); 124 SkScalar gain = 1.0f, bias = SkIntToScalar(0); 125 SkIPoint kernelOffset = SkIPoint::Make(1, 1); 126 auto tileMode = SkMatrixConvolutionImageFilter::kClamp_TileMode; 127 bool convolveAlpha = false; 128 sk_sp<SkImageFilter> convolve(SkMatrixConvolutionImageFilter::Make(kernelSize, 129 kernel, 130 gain, 131 bias, 132 kernelOffset, 133 tileMode, 134 convolveAlpha, 135 std::move(dilate))); 136 137 SkPaint paint; 138 paint.setImageFilter(std::move(convolve)); 139 DrawClippedImage(canvas, fImage.get(), paint); 140 canvas->translate(SkIntToScalar(100), 0); 141 } 142 { 143 // Test that crop offsets are absolute, not relative to the parent's crop rect. 144 sk_sp<SkColorFilter> cf1(SkColorFilter::MakeModeFilter(SK_ColorBLUE, 145 SkBlendMode::kSrcIn)); 146 sk_sp<SkColorFilter> cf2(SkColorFilter::MakeModeFilter(SK_ColorGREEN, 147 SkBlendMode::kSrcIn)); 148 SkImageFilter::CropRect outerRect(SkRect::MakeXYWH(SkIntToScalar(10), SkIntToScalar(10), 149 SkIntToScalar(80), SkIntToScalar(80))); 150 SkImageFilter::CropRect innerRect(SkRect::MakeXYWH(SkIntToScalar(20), SkIntToScalar(20), 151 SkIntToScalar(60), SkIntToScalar(60))); 152 sk_sp<SkImageFilter> color1(SkColorFilterImageFilter::Make(std::move(cf1), 153 nullptr, 154 &outerRect)); 155 sk_sp<SkImageFilter> color2(SkColorFilterImageFilter::Make(std::move(cf2), 156 std::move(color1), 157 &innerRect)); 158 159 SkPaint paint; 160 paint.setImageFilter(std::move(color2)); 161 paint.setColor(SK_ColorRED); 162 canvas->drawRect(SkRect::MakeXYWH(0, 0, 100, 100), paint); 163 canvas->translate(SkIntToScalar(100), 0); 164 } 165 } 166 167 private: 168 static void DrawClippedImage(SkCanvas* canvas, const SkImage* image, const SkPaint& paint) { 169 canvas->save(); 170 canvas->clipRect(SkRect::MakeIWH(image->width(), image->height())); 171 canvas->drawImage(image, 0, 0, &paint); 172 canvas->restore(); 173 } 174 175 sk_sp<SkImage> fImage; 176 177 typedef GM INHERITED; 178 }; 179 180 /////////////////////////////////////////////////////////////////////////////// 181 182 DEF_GM(return new ImageFiltersGraphGM;) 183
