1 /* 2 * Copyright 2014 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 "SkCanvas.h" 10 #include "SkColorFilter.h" 11 #include "SkColorPriv.h" 12 #include "SkShader.h" 13 14 #include "SkBitmapSource.h" 15 #include "SkBlurImageFilter.h" 16 #include "SkColorMatrixFilter.h" 17 #include "SkDisplacementMapEffect.h" 18 #include "SkDropShadowImageFilter.h" 19 #include "SkGradientShader.h" 20 #include "SkMorphologyImageFilter.h" 21 #include "SkColorFilterImageFilter.h" 22 #include "SkMergeImageFilter.h" 23 #include "SkOffsetImageFilter.h" 24 25 /////////////////////////////////////////////////////////////////////////////// 26 27 class ImageFiltersCropExpandGM : public skiagm::GM { 28 public: 29 ImageFiltersCropExpandGM () {} 30 31 protected: 32 33 virtual SkString onShortName() { 34 return SkString("imagefilterscropexpand"); 35 } 36 37 virtual SkISize onISize() { return SkISize::Make(570, 650); } 38 39 void make_checkerboard(SkBitmap* bitmap) { 40 bitmap->allocN32Pixels(64, 64); 41 SkCanvas canvas(*bitmap); 42 canvas.clear(0xFFFF0000); 43 SkPaint darkPaint; 44 darkPaint.setColor(0xFF404040); 45 SkPaint lightPaint; 46 lightPaint.setColor(0xFFA0A0A0); 47 for (int y = 8; y < 48; y += 16) { 48 for (int x = 8; x < 48; x += 16) { 49 canvas.save(); 50 canvas.translate(SkIntToScalar(x), SkIntToScalar(y)); 51 canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint); 52 canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint); 53 canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint); 54 canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint); 55 canvas.restore(); 56 } 57 } 58 } 59 60 void make_gradient_circle(int width, int height, SkBitmap* bitmap) { 61 SkScalar x = SkIntToScalar(width / 2); 62 SkScalar y = SkIntToScalar(height / 2); 63 SkScalar radius = SkMinScalar(x, y) * 0.8f; 64 bitmap->allocN32Pixels(width, height); 65 SkCanvas canvas(*bitmap); 66 canvas.clear(0x00000000); 67 SkColor colors[2]; 68 colors[0] = SK_ColorWHITE; 69 colors[1] = SK_ColorBLACK; 70 SkAutoTUnref<SkShader> shader( 71 SkGradientShader::CreateRadial(SkPoint::Make(x, y), radius, colors, NULL, 2, 72 SkShader::kClamp_TileMode) 73 ); 74 SkPaint paint; 75 paint.setShader(shader); 76 canvas.drawCircle(x, y, radius, paint); 77 } 78 79 static void draw(SkCanvas* canvas, const SkBitmap& bitmap, const SkRect& rect, SkImageFilter* filter) { 80 SkPaint paint; 81 paint.setImageFilter(filter)->unref(); 82 canvas->saveLayer(&rect, &paint); 83 canvas->drawBitmap(bitmap, 0, 0); 84 canvas->restore(); 85 86 SkPaint strokePaint; 87 strokePaint.setColor(0xFFFF0000); 88 strokePaint.setStyle(SkPaint::kStroke_Style); 89 canvas->drawRect(rect, strokePaint); 90 91 canvas->translate(SkIntToScalar(80), 0); 92 } 93 94 virtual void onDraw(SkCanvas* canvas) { 95 SkAutoTUnref<SkColorFilter> cf( 96 SkColorFilter::CreateModeFilter(SK_ColorBLUE, SkXfermode::kSrcIn_Mode)); 97 SkImageFilter::CropRect crop_rect( 98 SkRect::Make(SkIRect::MakeXYWH(10, 10, 44, 44)), 99 SkImageFilter::CropRect::kHasAll_CropEdge); 100 101 SkBitmap gradient_circle, checkerboard; 102 make_gradient_circle(64, 64, &gradient_circle); 103 make_checkerboard(&checkerboard); 104 105 SkAutoTUnref<SkImageFilter> gradient_circle_source( 106 SkBitmapSource::Create(gradient_circle)); 107 SkAutoTUnref<SkImageFilter> noop_cropped( 108 SkOffsetImageFilter::Create(0, 0, NULL, &crop_rect)); 109 SkScalar sk255 = SkIntToScalar(255); 110 SkScalar matrix[20] = { 1, 0, 0, 0, 0, 111 0, 1, 0, 0, sk255, 112 0, 0, 1, 0, 0, 113 0, 0, 0, 0, sk255 }; 114 SkAutoTUnref<SkColorFilter> cf_alpha_trans(SkColorMatrixFilter::Create(matrix)); 115 116 SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64)); 117 SkScalar MARGIN = SkIntToScalar(12); 118 119 SkIRect bounds; 120 r.roundOut(&bounds); 121 122 SkPaint paint; 123 canvas->translate(MARGIN, MARGIN); 124 for (int outset = -15; outset <= 20; outset += 5) { 125 canvas->save(); 126 SkRect rect = crop_rect.rect(); 127 rect.outset(SkIntToScalar(outset), 128 SkIntToScalar(outset)); 129 SkImageFilter::CropRect big_rect(rect, SkImageFilter::CropRect::kHasAll_CropEdge); 130 131 draw(canvas, checkerboard, rect, SkColorFilterImageFilter::Create( 132 cf_alpha_trans, noop_cropped.get(), &big_rect)); 133 134 draw(canvas, checkerboard, rect, SkBlurImageFilter::Create( 135 8.0f, 8.0f, noop_cropped.get(), &big_rect)); 136 137 draw(canvas, checkerboard, rect, SkDilateImageFilter::Create( 138 2, 2, noop_cropped.get(), &big_rect)); 139 140 draw(canvas, checkerboard, rect, SkErodeImageFilter::Create( 141 2, 2, noop_cropped.get(), &big_rect)); 142 143 draw(canvas, checkerboard, rect, SkDropShadowImageFilter::Create( 144 SkIntToScalar(10), SkIntToScalar(10), SkIntToScalar(3), SkIntToScalar(3), 145 SK_ColorBLUE, noop_cropped.get(), &big_rect)); 146 147 draw(canvas, checkerboard, rect, SkDisplacementMapEffect::Create( 148 SkDisplacementMapEffect::kR_ChannelSelectorType, 149 SkDisplacementMapEffect::kR_ChannelSelectorType, 150 SkIntToScalar(12), 151 gradient_circle_source.get(), 152 noop_cropped.get(), 153 &big_rect)); 154 155 draw(canvas, checkerboard, rect, SkOffsetImageFilter::Create( 156 SkIntToScalar(-8), SkIntToScalar(16), noop_cropped.get(), &big_rect)); 157 158 canvas->restore(); 159 canvas->translate(0, SkIntToScalar(80)); 160 } 161 } 162 163 private: 164 typedef GM INHERITED; 165 }; 166 167 /////////////////////////////////////////////////////////////////////////////// 168 169 static skiagm::GM* MyFactory(void*) { return new ImageFiltersCropExpandGM; } 170 static skiagm::GMRegistry reg(MyFactory); 171
