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 fBitmap = ToolUtils::create_string_bitmap(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 = 45 SkImage::MakeFromBitmap(ToolUtils::create_checkerboard_bitmap(80, 80, c1, c2, 8)); 46 fSmall = SkImage::MakeFromBitmap(ToolUtils::create_checkerboard_bitmap(64, 64, c1, c2, 8)); 47 fLarge = SkImage::MakeFromBitmap(ToolUtils::create_checkerboard_bitmap(96, 96, c1, c2, 8)); 48 fLargeW = SkImage::MakeFromBitmap(ToolUtils::create_checkerboard_bitmap(96, 64, c1, c2, 8)); 49 fLargeH = SkImage::MakeFromBitmap(ToolUtils::create_checkerboard_bitmap(64, 96, c1, c2, 8)); 50 } 51 onISize()52 SkISize onISize() override { 53 return SkISize::Make(600, 500); 54 } 55 drawClippedBitmap(SkCanvas * canvas,int x,int y,const SkPaint & paint) const56 void drawClippedBitmap(SkCanvas* canvas, int x, int y, const SkPaint& paint) const { 57 canvas->save(); 58 canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); 59 canvas->clipRect(SkRect::MakeWH(SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height()))); 60 canvas->drawBitmap(fBitmap, 0, 0, &paint); 61 canvas->restore(); 62 } 63 onDraw(SkCanvas * canvas)64 void onDraw(SkCanvas* canvas) override { 65 canvas->clear(SK_ColorBLACK); 66 SkPaint paint; 67 sk_sp<SkImageFilter> displ(SkImageFilters::Image(fCheckerboard)); 68 paint.setImageFilter(SkImageFilters::DisplacementMap( 69 SkColorChannel::kR, SkColorChannel::kG, 0.0f, displ, nullptr)); 70 this->drawClippedBitmap(canvas, 0, 0, paint); 71 paint.setImageFilter(SkImageFilters::DisplacementMap( 72 SkColorChannel::kB, SkColorChannel::kA, 16.0f, displ, nullptr)); 73 this->drawClippedBitmap(canvas, 100, 0, paint); 74 paint.setImageFilter(SkImageFilters::DisplacementMap( 75 SkColorChannel::kR, SkColorChannel::kB, 32.0f, displ, nullptr)); 76 this->drawClippedBitmap(canvas, 200, 0, paint); 77 paint.setImageFilter(SkImageFilters::DisplacementMap( 78 SkColorChannel::kG, SkColorChannel::kA, 48.0f, displ, nullptr)); 79 this->drawClippedBitmap(canvas, 300, 0, paint); 80 paint.setImageFilter(SkImageFilters::DisplacementMap( 81 SkColorChannel::kR, SkColorChannel::kA, 64.0f, displ, nullptr)); 82 this->drawClippedBitmap(canvas, 400, 0, paint); 83 84 paint.setImageFilter(SkImageFilters::DisplacementMap( 85 SkColorChannel::kR, SkColorChannel::kG, 40.0f, displ, nullptr)); 86 this->drawClippedBitmap(canvas, 0, 100, paint); 87 paint.setImageFilter(SkImageFilters::DisplacementMap( 88 SkColorChannel::kB, SkColorChannel::kA, 40.0f, displ, nullptr)); 89 this->drawClippedBitmap(canvas, 100, 100, paint); 90 paint.setImageFilter(SkImageFilters::DisplacementMap( 91 SkColorChannel::kR, SkColorChannel::kB, 40.0f, displ, nullptr)); 92 this->drawClippedBitmap(canvas, 200, 100, paint); 93 paint.setImageFilter(SkImageFilters::DisplacementMap( 94 SkColorChannel::kG, SkColorChannel::kA, 40.0f, displ, nullptr)); 95 this->drawClippedBitmap(canvas, 300, 100, paint); 96 paint.setImageFilter(SkImageFilters::DisplacementMap( 97 SkColorChannel::kR, SkColorChannel::kA, 40.0f, displ, nullptr)); 98 this->drawClippedBitmap(canvas, 400, 100, paint); 99 100 SkIRect cropRect = SkIRect::MakeXYWH(30, 30, 40, 40); 101 paint.setImageFilter(SkImageFilters::DisplacementMap( 102 SkColorChannel::kR, SkColorChannel::kG, 0.0f, displ, nullptr, &cropRect)); 103 this->drawClippedBitmap(canvas, 0, 200, paint); 104 paint.setImageFilter(SkImageFilters::DisplacementMap( 105 SkColorChannel::kB, SkColorChannel::kA, 16.0f, displ, nullptr, &cropRect)); 106 this->drawClippedBitmap(canvas, 100, 200, paint); 107 paint.setImageFilter(SkImageFilters::DisplacementMap( 108 SkColorChannel::kR, SkColorChannel::kB, 32.0f, displ, nullptr, &cropRect)); 109 this->drawClippedBitmap(canvas, 200, 200, paint); 110 paint.setImageFilter(SkImageFilters::DisplacementMap( 111 SkColorChannel::kG, SkColorChannel::kA, 48.0f, displ, nullptr, &cropRect)); 112 this->drawClippedBitmap(canvas, 300, 200, paint); 113 paint.setImageFilter(SkImageFilters::DisplacementMap( 114 SkColorChannel::kR, SkColorChannel::kA, 64.0f, displ, nullptr, &cropRect)); 115 this->drawClippedBitmap(canvas, 400, 200, paint); 116 117 paint.setImageFilter(SkImageFilters::DisplacementMap( 118 SkColorChannel::kR, SkColorChannel::kG, 40.0f, displ, nullptr, &cropRect)); 119 this->drawClippedBitmap(canvas, 0, 300, paint); 120 paint.setImageFilter(SkImageFilters::DisplacementMap( 121 SkColorChannel::kB, SkColorChannel::kA, 40.0f, displ, nullptr, &cropRect)); 122 this->drawClippedBitmap(canvas, 100, 300, paint); 123 paint.setImageFilter(SkImageFilters::DisplacementMap( 124 SkColorChannel::kR, SkColorChannel::kB, 40.0f, displ, nullptr, &cropRect)); 125 this->drawClippedBitmap(canvas, 200, 300, paint); 126 paint.setImageFilter(SkImageFilters::DisplacementMap( 127 SkColorChannel::kG, SkColorChannel::kA, 40.0f, displ, nullptr, &cropRect)); 128 this->drawClippedBitmap(canvas, 300, 300, paint); 129 paint.setImageFilter(SkImageFilters::DisplacementMap( 130 SkColorChannel::kR, SkColorChannel::kA, 40.0f, displ, nullptr, &cropRect)); 131 this->drawClippedBitmap(canvas, 400, 300, paint); 132 133 // Test for negative scale. 134 paint.setImageFilter(SkImageFilters::DisplacementMap( 135 SkColorChannel::kG, SkColorChannel::kA, -40.0f, displ, nullptr)); 136 this->drawClippedBitmap(canvas, 500, 0, paint); 137 138 // Tests for images of different sizes 139 displ = SkImageFilters::Image(fSmall); 140 paint.setImageFilter(SkImageFilters::DisplacementMap( 141 SkColorChannel::kR, SkColorChannel::kG, 40.0f, std::move(displ), nullptr)); 142 this->drawClippedBitmap(canvas, 0, 400, paint); 143 displ = SkImageFilters::Image(fLarge); 144 paint.setImageFilter(SkImageFilters::DisplacementMap( 145 SkColorChannel::kB, SkColorChannel::kA, 40.0f, std::move(displ), nullptr)); 146 this->drawClippedBitmap(canvas, 100, 400, paint); 147 displ = SkImageFilters::Image(fLargeW); 148 paint.setImageFilter(SkImageFilters::DisplacementMap( 149 SkColorChannel::kR, SkColorChannel::kB, 40.0f, std::move(displ), nullptr)); 150 this->drawClippedBitmap(canvas, 200, 400, paint); 151 displ = SkImageFilters::Image(fLargeH); 152 paint.setImageFilter(SkImageFilters::DisplacementMap( 153 SkColorChannel::kG, SkColorChannel::kA, 40.0f, std::move(displ), nullptr)); 154 this->drawClippedBitmap(canvas, 300, 400, paint); 155 156 // Test for no given displacement input. In this case, both displacement 157 // and color should use the same bitmap, given to SkCanvas::drawBitmap() 158 // as an input argument. 159 paint.setImageFilter(SkImageFilters::DisplacementMap( 160 SkColorChannel::kG, SkColorChannel::kA, 40.0f, nullptr, nullptr)); 161 this->drawClippedBitmap(canvas, 400, 400, paint); 162 } 163 164 private: 165 SkBitmap fBitmap; 166 sk_sp<SkImage> fCheckerboard, fSmall, fLarge, fLargeW, fLargeH; 167 168 typedef GM INHERITED; 169 }; 170 171 ////////////////////////////////////////////////////////////////////////////// 172 173 DEF_GM(return new DisplacementMapGM;) 174 } 175