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 SkBlendMode::kSrcOver)); 57 58 SkPaint paint; 59 paint.setImageFilter(std::move(merge)); 60 canvas->drawPaint(paint); 61 canvas->translate(SkIntToScalar(100), 0); 62 } 63 { 64 sk_sp<SkImageFilter> morph(SkDilateImageFilter::Make(5, 5, nullptr)); 65 66 SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0, 67 0, SK_Scalar1, 0, 0, 0, 68 0, 0, SK_Scalar1, 0, 0, 69 0, 0, 0, 0.5f, 0 }; 70 71 sk_sp<SkColorFilter> matrixFilter(SkColorFilter::MakeMatrixFilterRowMajor255(matrix)); 72 sk_sp<SkImageFilter> colorMorph(SkColorFilterImageFilter::Make(std::move(matrixFilter), 73 std::move(morph))); 74 SkPaint paint; 75 paint.setImageFilter(SkXfermodeImageFilter::Make(SkBlendMode::kSrcOver, 76 std::move(colorMorph))); 77 78 DrawClippedImage(canvas, fImage.get(), paint); 79 canvas->translate(SkIntToScalar(100), 0); 80 } 81 { 82 SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0, 83 0, SK_Scalar1, 0, 0, 0, 84 0, 0, SK_Scalar1, 0, 0, 85 0, 0, 0, 0.5f, 0 }; 86 sk_sp<SkColorFilter> matrixCF(SkColorFilter::MakeMatrixFilterRowMajor255(matrix)); 87 sk_sp<SkImageFilter> matrixFilter(SkColorFilterImageFilter::Make(std::move(matrixCF), 88 nullptr)); 89 sk_sp<SkImageFilter> offsetFilter(SkOffsetImageFilter::Make(10.0f, 10.f, 90 matrixFilter)); 91 92 SkPaint paint; 93 paint.setImageFilter(SkArithmeticImageFilter::Make( 94 0, 1, 1, 0, true, std::move(matrixFilter), std::move(offsetFilter), nullptr)); 95 96 DrawClippedImage(canvas, fImage.get(), paint); 97 canvas->translate(SkIntToScalar(100), 0); 98 } 99 { 100 sk_sp<SkImageFilter> blur(SkBlurImageFilter::Make(SkIntToScalar(10), 101 SkIntToScalar(10), 102 nullptr)); 103 104 SkImageFilter::CropRect cropRect(SkRect::MakeWH(SkIntToScalar(95), SkIntToScalar(100))); 105 SkPaint paint; 106 paint.setImageFilter( 107 SkXfermodeImageFilter::Make(SkBlendMode::kSrcIn, std::move(blur), nullptr, 108 &cropRect)); 109 DrawClippedImage(canvas, fImage.get(), paint); 110 canvas->translate(SkIntToScalar(100), 0); 111 } 112 { 113 // Dilate -> matrix convolution. 114 // This tests that a filter using asFragmentProcessor (matrix 115 // convolution) correctly handles a non-zero source offset 116 // (supplied by the dilate). 117 sk_sp<SkImageFilter> dilate(SkDilateImageFilter::Make(5, 5, nullptr)); 118 119 SkScalar kernel[9] = { 120 SkIntToScalar(-1), SkIntToScalar( -1 ), SkIntToScalar(-1), 121 SkIntToScalar(-1), SkIntToScalar( 7 ), SkIntToScalar(-1), 122 SkIntToScalar(-1), SkIntToScalar( -1 ), SkIntToScalar(-1), 123 }; 124 SkISize kernelSize = SkISize::Make(3, 3); 125 SkScalar gain = 1.0f, bias = SkIntToScalar(0); 126 SkIPoint kernelOffset = SkIPoint::Make(1, 1); 127 auto tileMode = SkMatrixConvolutionImageFilter::kClamp_TileMode; 128 bool convolveAlpha = false; 129 sk_sp<SkImageFilter> convolve(SkMatrixConvolutionImageFilter::Make(kernelSize, 130 kernel, 131 gain, 132 bias, 133 kernelOffset, 134 tileMode, 135 convolveAlpha, 136 std::move(dilate))); 137 138 SkPaint paint; 139 paint.setImageFilter(std::move(convolve)); 140 DrawClippedImage(canvas, fImage.get(), paint); 141 canvas->translate(SkIntToScalar(100), 0); 142 } 143 { 144 // Test that crop offsets are absolute, not relative to the parent's crop rect. 145 sk_sp<SkColorFilter> cf1(SkColorFilter::MakeModeFilter(SK_ColorBLUE, 146 SkBlendMode::kSrcIn)); 147 sk_sp<SkColorFilter> cf2(SkColorFilter::MakeModeFilter(SK_ColorGREEN, 148 SkBlendMode::kSrcIn)); 149 SkImageFilter::CropRect outerRect(SkRect::MakeXYWH(SkIntToScalar(10), SkIntToScalar(10), 150 SkIntToScalar(80), SkIntToScalar(80))); 151 SkImageFilter::CropRect innerRect(SkRect::MakeXYWH(SkIntToScalar(20), SkIntToScalar(20), 152 SkIntToScalar(60), SkIntToScalar(60))); 153 sk_sp<SkImageFilter> color1(SkColorFilterImageFilter::Make(std::move(cf1), 154 nullptr, 155 &outerRect)); 156 sk_sp<SkImageFilter> color2(SkColorFilterImageFilter::Make(std::move(cf2), 157 std::move(color1), 158 &innerRect)); 159 160 SkPaint paint; 161 paint.setImageFilter(std::move(color2)); 162 paint.setColor(SK_ColorRED); 163 canvas->drawRect(SkRect::MakeXYWH(0, 0, 100, 100), paint); 164 canvas->translate(SkIntToScalar(100), 0); 165 } 166 } 167 168 private: 169 static void DrawClippedImage(SkCanvas* canvas, const SkImage* image, const SkPaint& paint) { 170 canvas->save(); 171 canvas->clipRect(SkRect::MakeIWH(image->width(), image->height())); 172 canvas->drawImage(image, 0, 0, &paint); 173 canvas->restore(); 174 } 175 176 sk_sp<SkImage> fImage; 177 178 typedef GM INHERITED; 179 }; 180 181 /////////////////////////////////////////////////////////////////////////////// 182 183 DEF_GM(return new ImageFiltersGraphGM;) 184
