1 /* 2 * Copyright 2013 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/gm.h" 9 #include "include/core/SkBitmap.h" 10 #include "include/core/SkCanvas.h" 11 #include "include/core/SkColor.h" 12 #include "include/core/SkImage.h" 13 #include "include/core/SkImageFilter.h" 14 #include "include/core/SkPaint.h" 15 #include "include/core/SkRect.h" 16 #include "include/core/SkRefCnt.h" 17 #include "include/core/SkScalar.h" 18 #include "include/core/SkSize.h" 19 #include "include/core/SkString.h" 20 #include "include/effects/SkImageFilters.h" 21 #include "tools/ToolUtils.h" 22 23 #include <utility> 24 25 namespace skiagm { 26 27 class DisplacementMapGM : public GM { 28 public: DisplacementMapGM()29 DisplacementMapGM() { 30 this->setBGColor(0xFF000000); 31 } 32 33 protected: onShortName()34 SkString onShortName() override { 35 return SkString("displacement"); 36 } 37 onOnceBeforeDraw()38 void onOnceBeforeDraw() override { 39 fImage = ToolUtils::create_string_image(80, 80, 0xFF884422, 15, 55, 96, "g"); 40 41 SkColor c1 = ToolUtils::color_to_565(0xFF244484); 42 SkColor c2 = ToolUtils::color_to_565(0xFF804020); 43 44 fCheckerboard = ToolUtils::create_checkerboard_image(80, 80, c1, c2, 8); 45 fSmall = ToolUtils::create_checkerboard_image(64, 64, c1, c2, 8); 46 fLarge = ToolUtils::create_checkerboard_image(96, 96, c1, c2, 8); 47 fLargeW = ToolUtils::create_checkerboard_image(96, 64, c1, c2, 8); 48 fLargeH = ToolUtils::create_checkerboard_image(64, 96, c1, c2, 8); 49 } 50 onISize()51 SkISize onISize() override { 52 return SkISize::Make(600, 500); 53 } 54 drawClippedBitmap(SkCanvas * canvas,int x,int y,const SkPaint & paint) const55 void drawClippedBitmap(SkCanvas* canvas, int x, int y, const SkPaint& paint) const { 56 canvas->save(); 57 canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); 58 canvas->clipIRect(fImage->bounds()); 59 canvas->drawImage(fImage, 0, 0, SkSamplingOptions(), &paint); 60 canvas->restore(); 61 } 62 onDraw(SkCanvas * canvas)63 void onDraw(SkCanvas* canvas) override { 64 canvas->clear(SK_ColorBLACK); 65 SkPaint paint; 66 sk_sp<SkImageFilter> displ(SkImageFilters::Image(fCheckerboard)); 67 paint.setImageFilter(SkImageFilters::DisplacementMap( 68 SkColorChannel::kR, SkColorChannel::kG, 0.0f, displ, nullptr)); 69 this->drawClippedBitmap(canvas, 0, 0, paint); 70 paint.setImageFilter(SkImageFilters::DisplacementMap( 71 SkColorChannel::kB, SkColorChannel::kA, 16.0f, displ, nullptr)); 72 this->drawClippedBitmap(canvas, 100, 0, paint); 73 paint.setImageFilter(SkImageFilters::DisplacementMap( 74 SkColorChannel::kR, SkColorChannel::kB, 32.0f, displ, nullptr)); 75 this->drawClippedBitmap(canvas, 200, 0, paint); 76 paint.setImageFilter(SkImageFilters::DisplacementMap( 77 SkColorChannel::kG, SkColorChannel::kA, 48.0f, displ, nullptr)); 78 this->drawClippedBitmap(canvas, 300, 0, paint); 79 paint.setImageFilter(SkImageFilters::DisplacementMap( 80 SkColorChannel::kR, SkColorChannel::kA, 64.0f, displ, nullptr)); 81 this->drawClippedBitmap(canvas, 400, 0, paint); 82 83 paint.setImageFilter(SkImageFilters::DisplacementMap( 84 SkColorChannel::kR, SkColorChannel::kG, 40.0f, displ, nullptr)); 85 this->drawClippedBitmap(canvas, 0, 100, paint); 86 paint.setImageFilter(SkImageFilters::DisplacementMap( 87 SkColorChannel::kB, SkColorChannel::kA, 40.0f, displ, nullptr)); 88 this->drawClippedBitmap(canvas, 100, 100, paint); 89 paint.setImageFilter(SkImageFilters::DisplacementMap( 90 SkColorChannel::kR, SkColorChannel::kB, 40.0f, displ, nullptr)); 91 this->drawClippedBitmap(canvas, 200, 100, paint); 92 paint.setImageFilter(SkImageFilters::DisplacementMap( 93 SkColorChannel::kG, SkColorChannel::kA, 40.0f, displ, nullptr)); 94 this->drawClippedBitmap(canvas, 300, 100, paint); 95 paint.setImageFilter(SkImageFilters::DisplacementMap( 96 SkColorChannel::kR, SkColorChannel::kA, 40.0f, displ, nullptr)); 97 this->drawClippedBitmap(canvas, 400, 100, paint); 98 99 SkIRect cropRect = SkIRect::MakeXYWH(30, 30, 40, 40); 100 paint.setImageFilter(SkImageFilters::DisplacementMap( 101 SkColorChannel::kR, SkColorChannel::kG, 0.0f, displ, nullptr, &cropRect)); 102 this->drawClippedBitmap(canvas, 0, 200, paint); 103 paint.setImageFilter(SkImageFilters::DisplacementMap( 104 SkColorChannel::kB, SkColorChannel::kA, 16.0f, displ, nullptr, &cropRect)); 105 this->drawClippedBitmap(canvas, 100, 200, paint); 106 paint.setImageFilter(SkImageFilters::DisplacementMap( 107 SkColorChannel::kR, SkColorChannel::kB, 32.0f, displ, nullptr, &cropRect)); 108 this->drawClippedBitmap(canvas, 200, 200, paint); 109 paint.setImageFilter(SkImageFilters::DisplacementMap( 110 SkColorChannel::kG, SkColorChannel::kA, 48.0f, displ, nullptr, &cropRect)); 111 this->drawClippedBitmap(canvas, 300, 200, paint); 112 paint.setImageFilter(SkImageFilters::DisplacementMap( 113 SkColorChannel::kR, SkColorChannel::kA, 64.0f, displ, nullptr, &cropRect)); 114 this->drawClippedBitmap(canvas, 400, 200, paint); 115 116 paint.setImageFilter(SkImageFilters::DisplacementMap( 117 SkColorChannel::kR, SkColorChannel::kG, 40.0f, displ, nullptr, &cropRect)); 118 this->drawClippedBitmap(canvas, 0, 300, paint); 119 paint.setImageFilter(SkImageFilters::DisplacementMap( 120 SkColorChannel::kB, SkColorChannel::kA, 40.0f, displ, nullptr, &cropRect)); 121 this->drawClippedBitmap(canvas, 100, 300, paint); 122 paint.setImageFilter(SkImageFilters::DisplacementMap( 123 SkColorChannel::kR, SkColorChannel::kB, 40.0f, displ, nullptr, &cropRect)); 124 this->drawClippedBitmap(canvas, 200, 300, paint); 125 paint.setImageFilter(SkImageFilters::DisplacementMap( 126 SkColorChannel::kG, SkColorChannel::kA, 40.0f, displ, nullptr, &cropRect)); 127 this->drawClippedBitmap(canvas, 300, 300, paint); 128 paint.setImageFilter(SkImageFilters::DisplacementMap( 129 SkColorChannel::kR, SkColorChannel::kA, 40.0f, displ, nullptr, &cropRect)); 130 this->drawClippedBitmap(canvas, 400, 300, paint); 131 132 // Test for negative scale. 133 paint.setImageFilter(SkImageFilters::DisplacementMap( 134 SkColorChannel::kG, SkColorChannel::kA, -40.0f, displ, nullptr)); 135 this->drawClippedBitmap(canvas, 500, 0, paint); 136 137 // Tests for images of different sizes 138 displ = SkImageFilters::Image(fSmall); 139 paint.setImageFilter(SkImageFilters::DisplacementMap( 140 SkColorChannel::kR, SkColorChannel::kG, 40.0f, std::move(displ), nullptr)); 141 this->drawClippedBitmap(canvas, 0, 400, paint); 142 displ = SkImageFilters::Image(fLarge); 143 paint.setImageFilter(SkImageFilters::DisplacementMap( 144 SkColorChannel::kB, SkColorChannel::kA, 40.0f, std::move(displ), nullptr)); 145 this->drawClippedBitmap(canvas, 100, 400, paint); 146 displ = SkImageFilters::Image(fLargeW); 147 paint.setImageFilter(SkImageFilters::DisplacementMap( 148 SkColorChannel::kR, SkColorChannel::kB, 40.0f, std::move(displ), nullptr)); 149 this->drawClippedBitmap(canvas, 200, 400, paint); 150 displ = SkImageFilters::Image(fLargeH); 151 paint.setImageFilter(SkImageFilters::DisplacementMap( 152 SkColorChannel::kG, SkColorChannel::kA, 40.0f, std::move(displ), nullptr)); 153 this->drawClippedBitmap(canvas, 300, 400, paint); 154 155 // Test for no given displacement input. In this case, both displacement 156 // and color should use the same bitmap, given to SkCanvas::drawBitmap() 157 // as an input argument. 158 paint.setImageFilter(SkImageFilters::DisplacementMap( 159 SkColorChannel::kG, SkColorChannel::kA, 40.0f, nullptr, nullptr)); 160 this->drawClippedBitmap(canvas, 400, 400, paint); 161 } 162 163 private: 164 sk_sp<SkImage> fImage; 165 sk_sp<SkImage> fCheckerboard, fSmall, fLarge, fLargeW, fLargeH; 166 167 using INHERITED = GM; 168 }; 169 170 ////////////////////////////////////////////////////////////////////////////// 171 172 DEF_GM(return new DisplacementMapGM;) 173 } // namespace skiagm 174