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 #include "tools/fonts/FontToolUtils.h" 23 24 #include <utility> 25 26 namespace skiagm { 27 28 class DisplacementMapGM : public GM { 29 public: DisplacementMapGM()30 DisplacementMapGM() { 31 this->setBGColor(0xFF000000); 32 } 33 34 protected: getName() const35 SkString getName() const override { return SkString("displacement"); } 36 onOnceBeforeDraw()37 void onOnceBeforeDraw() override { 38 fImage = ToolUtils::CreateStringImage(80, 80, 0xFF884422, 15, 55, 96, "g"); 39 40 SkColor c1 = ToolUtils::color_to_565(0xFF244484); 41 SkColor c2 = ToolUtils::color_to_565(0xFF804020); 42 43 fCheckerboard = ToolUtils::create_checkerboard_image(80, 80, c1, c2, 8); 44 fSmall = ToolUtils::create_checkerboard_image(64, 64, c1, c2, 8); 45 fLarge = ToolUtils::create_checkerboard_image(96, 96, c1, c2, 8); 46 fLargeW = ToolUtils::create_checkerboard_image(96, 64, c1, c2, 8); 47 fLargeH = ToolUtils::create_checkerboard_image(64, 96, c1, c2, 8); 48 } 49 getISize()50 SkISize getISize() override { return SkISize::Make(600, 500); } 51 drawClippedBitmap(SkCanvas * canvas,int x,int y,const SkPaint & paint) const52 void drawClippedBitmap(SkCanvas* canvas, int x, int y, const SkPaint& paint) const { 53 canvas->save(); 54 canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); 55 canvas->clipIRect(fImage->bounds()); 56 canvas->drawImage(fImage, 0, 0, SkSamplingOptions(), &paint); 57 canvas->restore(); 58 } 59 onDraw(SkCanvas * canvas)60 void onDraw(SkCanvas* canvas) override { 61 canvas->clear(SK_ColorBLACK); 62 SkPaint paint; 63 sk_sp<SkImageFilter> displ(SkImageFilters::Image(fCheckerboard, SkFilterMode::kLinear)); 64 paint.setImageFilter(SkImageFilters::DisplacementMap( 65 SkColorChannel::kR, SkColorChannel::kG, 0.0f, displ, nullptr)); 66 this->drawClippedBitmap(canvas, 0, 0, paint); 67 paint.setImageFilter(SkImageFilters::DisplacementMap( 68 SkColorChannel::kB, SkColorChannel::kA, 16.0f, displ, nullptr)); 69 this->drawClippedBitmap(canvas, 100, 0, paint); 70 paint.setImageFilter(SkImageFilters::DisplacementMap( 71 SkColorChannel::kR, SkColorChannel::kB, 32.0f, displ, nullptr)); 72 this->drawClippedBitmap(canvas, 200, 0, paint); 73 paint.setImageFilter(SkImageFilters::DisplacementMap( 74 SkColorChannel::kG, SkColorChannel::kA, 48.0f, displ, nullptr)); 75 this->drawClippedBitmap(canvas, 300, 0, paint); 76 paint.setImageFilter(SkImageFilters::DisplacementMap( 77 SkColorChannel::kR, SkColorChannel::kA, 64.0f, displ, nullptr)); 78 this->drawClippedBitmap(canvas, 400, 0, paint); 79 80 paint.setImageFilter(SkImageFilters::DisplacementMap( 81 SkColorChannel::kR, SkColorChannel::kG, 40.0f, displ, nullptr)); 82 this->drawClippedBitmap(canvas, 0, 100, paint); 83 paint.setImageFilter(SkImageFilters::DisplacementMap( 84 SkColorChannel::kB, SkColorChannel::kA, 40.0f, displ, nullptr)); 85 this->drawClippedBitmap(canvas, 100, 100, paint); 86 paint.setImageFilter(SkImageFilters::DisplacementMap( 87 SkColorChannel::kR, SkColorChannel::kB, 40.0f, displ, nullptr)); 88 this->drawClippedBitmap(canvas, 200, 100, paint); 89 paint.setImageFilter(SkImageFilters::DisplacementMap( 90 SkColorChannel::kG, SkColorChannel::kA, 40.0f, displ, nullptr)); 91 this->drawClippedBitmap(canvas, 300, 100, paint); 92 paint.setImageFilter(SkImageFilters::DisplacementMap( 93 SkColorChannel::kR, SkColorChannel::kA, 40.0f, displ, nullptr)); 94 this->drawClippedBitmap(canvas, 400, 100, paint); 95 96 SkIRect cropRect = SkIRect::MakeXYWH(30, 30, 40, 40); 97 paint.setImageFilter(SkImageFilters::DisplacementMap( 98 SkColorChannel::kR, SkColorChannel::kG, 0.0f, displ, nullptr, &cropRect)); 99 this->drawClippedBitmap(canvas, 0, 200, paint); 100 paint.setImageFilter(SkImageFilters::DisplacementMap( 101 SkColorChannel::kB, SkColorChannel::kA, 16.0f, displ, nullptr, &cropRect)); 102 this->drawClippedBitmap(canvas, 100, 200, paint); 103 paint.setImageFilter(SkImageFilters::DisplacementMap( 104 SkColorChannel::kR, SkColorChannel::kB, 32.0f, displ, nullptr, &cropRect)); 105 this->drawClippedBitmap(canvas, 200, 200, paint); 106 paint.setImageFilter(SkImageFilters::DisplacementMap( 107 SkColorChannel::kG, SkColorChannel::kA, 48.0f, displ, nullptr, &cropRect)); 108 this->drawClippedBitmap(canvas, 300, 200, paint); 109 paint.setImageFilter(SkImageFilters::DisplacementMap( 110 SkColorChannel::kR, SkColorChannel::kA, 64.0f, displ, nullptr, &cropRect)); 111 this->drawClippedBitmap(canvas, 400, 200, paint); 112 113 paint.setImageFilter(SkImageFilters::DisplacementMap( 114 SkColorChannel::kR, SkColorChannel::kG, 40.0f, displ, nullptr, &cropRect)); 115 this->drawClippedBitmap(canvas, 0, 300, paint); 116 paint.setImageFilter(SkImageFilters::DisplacementMap( 117 SkColorChannel::kB, SkColorChannel::kA, 40.0f, displ, nullptr, &cropRect)); 118 this->drawClippedBitmap(canvas, 100, 300, paint); 119 paint.setImageFilter(SkImageFilters::DisplacementMap( 120 SkColorChannel::kR, SkColorChannel::kB, 40.0f, displ, nullptr, &cropRect)); 121 this->drawClippedBitmap(canvas, 200, 300, paint); 122 paint.setImageFilter(SkImageFilters::DisplacementMap( 123 SkColorChannel::kG, SkColorChannel::kA, 40.0f, displ, nullptr, &cropRect)); 124 this->drawClippedBitmap(canvas, 300, 300, paint); 125 paint.setImageFilter(SkImageFilters::DisplacementMap( 126 SkColorChannel::kR, SkColorChannel::kA, 40.0f, displ, nullptr, &cropRect)); 127 this->drawClippedBitmap(canvas, 400, 300, paint); 128 129 // Test for negative scale. 130 paint.setImageFilter(SkImageFilters::DisplacementMap( 131 SkColorChannel::kG, SkColorChannel::kA, -40.0f, displ, nullptr)); 132 this->drawClippedBitmap(canvas, 500, 0, paint); 133 134 // Tests for images of different sizes 135 displ = SkImageFilters::Image(fSmall, SkFilterMode::kLinear); 136 paint.setImageFilter(SkImageFilters::DisplacementMap( 137 SkColorChannel::kR, SkColorChannel::kG, 40.0f, std::move(displ), nullptr)); 138 this->drawClippedBitmap(canvas, 0, 400, paint); 139 displ = SkImageFilters::Image(fLarge, SkFilterMode::kLinear); 140 paint.setImageFilter(SkImageFilters::DisplacementMap( 141 SkColorChannel::kB, SkColorChannel::kA, 40.0f, std::move(displ), nullptr)); 142 this->drawClippedBitmap(canvas, 100, 400, paint); 143 displ = SkImageFilters::Image(fLargeW, SkFilterMode::kLinear); 144 paint.setImageFilter(SkImageFilters::DisplacementMap( 145 SkColorChannel::kR, SkColorChannel::kB, 40.0f, std::move(displ), nullptr)); 146 this->drawClippedBitmap(canvas, 200, 400, paint); 147 displ = SkImageFilters::Image(fLargeH, SkFilterMode::kLinear); 148 paint.setImageFilter(SkImageFilters::DisplacementMap( 149 SkColorChannel::kG, SkColorChannel::kA, 40.0f, std::move(displ), nullptr)); 150 this->drawClippedBitmap(canvas, 300, 400, paint); 151 152 // Test for no given displacement input. In this case, both displacement 153 // and color should use the same bitmap, given to SkCanvas::drawBitmap() 154 // as an input argument. 155 paint.setImageFilter(SkImageFilters::DisplacementMap( 156 SkColorChannel::kG, SkColorChannel::kA, 40.0f, nullptr, nullptr)); 157 this->drawClippedBitmap(canvas, 400, 400, paint); 158 } 159 160 private: 161 sk_sp<SkImage> fImage; 162 sk_sp<SkImage> fCheckerboard, fSmall, fLarge, fLargeW, fLargeH; 163 164 using INHERITED = GM; 165 }; 166 167 ////////////////////////////////////////////////////////////////////////////// 168 169 DEF_GM(return new DisplacementMapGM;) 170 } // namespace skiagm 171