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 "SkLightingImageFilter.h" 10 #include "SkOffsetImageFilter.h" 11 12 #define WIDTH 330 13 #define HEIGHT 660 14 15 namespace skiagm { 16 17 class ImageLightingGM : public GM { 18 public: 19 ImageLightingGM() : fInitialized(false) { 20 this->setBGColor(0xFF000000); 21 } 22 23 protected: 24 25 SkString onShortName() override { 26 return SkString("lighting"); 27 } 28 29 void make_bitmap() { 30 fBitmap.allocN32Pixels(100, 100); 31 SkCanvas canvas(fBitmap); 32 canvas.clear(0x00000000); 33 SkPaint paint; 34 paint.setAntiAlias(true); 35 sk_tool_utils::set_portable_typeface(&paint); 36 paint.setColor(0xFFFFFFFF); 37 paint.setTextSize(SkIntToScalar(96)); 38 const char* str = "e"; 39 canvas.drawText(str, strlen(str), SkIntToScalar(20), SkIntToScalar(70), paint); 40 } 41 42 SkISize onISize() override { 43 return SkISize::Make(WIDTH, HEIGHT); 44 } 45 46 void drawClippedBitmap(SkCanvas* canvas, const SkPaint& paint, int x, int y) { 47 canvas->save(); 48 canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); 49 canvas->clipRect(SkRect::MakeWH( 50 SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height()))); 51 canvas->drawBitmap(fBitmap, 0, 0, &paint); 52 canvas->restore(); 53 } 54 55 void onDraw(SkCanvas* canvas) override { 56 if (!fInitialized) { 57 make_bitmap(); 58 fInitialized = true; 59 } 60 canvas->clear(0xFF101010); 61 SkPaint checkPaint; 62 checkPaint.setColor(0xFF202020); 63 for (int y = 0; y < HEIGHT; y += 16) { 64 for (int x = 0; x < WIDTH; x += 16) { 65 canvas->save(); 66 canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); 67 canvas->drawRect(SkRect::MakeXYWH(8, 0, 8, 8), checkPaint); 68 canvas->drawRect(SkRect::MakeXYWH(0, 8, 8, 8), checkPaint); 69 canvas->restore(); 70 } 71 } 72 SkPoint3 pointLocation(0, 0, SkIntToScalar(10)); 73 SkScalar azimuthRad = SkDegreesToRadians(SkIntToScalar(225)); 74 SkScalar elevationRad = SkDegreesToRadians(SkIntToScalar(5)); 75 SkPoint3 distantDirection(SkScalarMul(SkScalarCos(azimuthRad), SkScalarCos(elevationRad)), 76 SkScalarMul(SkScalarSin(azimuthRad), SkScalarCos(elevationRad)), 77 SkScalarSin(elevationRad)); 78 SkPoint3 spotLocation(SkIntToScalar(-10), SkIntToScalar(-10), SkIntToScalar(20)); 79 SkPoint3 spotTarget(SkIntToScalar(40), SkIntToScalar(40), 0); 80 SkScalar spotExponent = SK_Scalar1; 81 SkScalar cutoffAngle = SkIntToScalar(15); 82 SkScalar kd = SkIntToScalar(2); 83 SkScalar ks = SkIntToScalar(1); 84 SkScalar shininess = SkIntToScalar(8); 85 SkScalar surfaceScale = SkIntToScalar(1); 86 SkColor white(0xFFFFFFFF); 87 SkPaint paint; 88 89 SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(20, 10, 60, 65)); 90 SkImageFilter::CropRect fullSizeCropRect(SkRect::MakeXYWH(0, 0, 100, 100)); 91 SkAutoTUnref<SkImageFilter> noopCropped(SkOffsetImageFilter::Create(0, 0, NULL, &cropRect)); 92 93 int y = 0; 94 for (int i = 0; i < 3; i++) { 95 const SkImageFilter::CropRect* cr = (i == 1) ? &cropRect : (i == 2) ? &fullSizeCropRect : NULL; 96 SkImageFilter* input = (i == 2) ? noopCropped.get() : NULL; 97 paint.setImageFilter(SkLightingImageFilter::CreatePointLitDiffuse(pointLocation, 98 white, 99 surfaceScale, 100 kd, 101 input, 102 cr))->unref(); 103 drawClippedBitmap(canvas, paint, 0, y); 104 105 paint.setImageFilter(SkLightingImageFilter::CreateDistantLitDiffuse(distantDirection, 106 white, 107 surfaceScale, 108 kd, 109 input, 110 cr))->unref(); 111 drawClippedBitmap(canvas, paint, 110, y); 112 113 paint.setImageFilter(SkLightingImageFilter::CreateSpotLitDiffuse(spotLocation, 114 spotTarget, 115 spotExponent, 116 cutoffAngle, 117 white, 118 surfaceScale, 119 kd, 120 input, 121 cr))->unref(); 122 drawClippedBitmap(canvas, paint, 220, y); 123 124 y += 110; 125 126 paint.setImageFilter(SkLightingImageFilter::CreatePointLitSpecular(pointLocation, 127 white, 128 surfaceScale, 129 ks, 130 shininess, 131 input, 132 cr))->unref(); 133 drawClippedBitmap(canvas, paint, 0, y); 134 135 paint.setImageFilter(SkLightingImageFilter::CreateDistantLitSpecular(distantDirection, 136 white, 137 surfaceScale, 138 ks, 139 shininess, 140 input, 141 cr))->unref(); 142 drawClippedBitmap(canvas, paint, 110, y); 143 144 paint.setImageFilter(SkLightingImageFilter::CreateSpotLitSpecular(spotLocation, 145 spotTarget, 146 spotExponent, 147 cutoffAngle, 148 white, 149 surfaceScale, 150 ks, 151 shininess, 152 input, 153 cr))->unref(); 154 drawClippedBitmap(canvas, paint, 220, y); 155 156 y += 110; 157 } 158 } 159 160 private: 161 typedef GM INHERITED; 162 SkBitmap fBitmap; 163 bool fInitialized; 164 }; 165 166 ////////////////////////////////////////////////////////////////////////////// 167 168 static GM* MyFactory(void*) { return new ImageLightingGM; } 169 static GMRegistry reg(MyFactory); 170 171 } 172
