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 11 #define WIDTH 330 12 #define HEIGHT 220 13 14 namespace skiagm { 15 16 class ImageLightingGM : public GM { 17 public: 18 ImageLightingGM() : fInitialized(false) { 19 this->setBGColor(0xFF000000); 20 } 21 22 protected: 23 virtual SkString onShortName() { 24 return SkString("lighting"); 25 } 26 27 void make_bitmap() { 28 fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 100, 100); 29 fBitmap.allocPixels(); 30 SkDevice device(fBitmap); 31 SkCanvas canvas(&device); 32 canvas.clear(0x00000000); 33 SkPaint paint; 34 paint.setAntiAlias(true); 35 paint.setColor(0xFFFFFFFF); 36 paint.setTextSize(SkIntToScalar(96)); 37 const char* str = "e"; 38 canvas.drawText(str, strlen(str), SkIntToScalar(20), SkIntToScalar(70), paint); 39 } 40 41 virtual SkISize onISize() { 42 return make_isize(WIDTH, HEIGHT); 43 } 44 45 void drawClippedBitmap(SkCanvas* canvas, const SkPaint& paint, int x, int y) { 46 canvas->save(); 47 canvas->clipRect(SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y), 48 SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height()))); 49 canvas->drawBitmap(fBitmap, SkIntToScalar(x), SkIntToScalar(y), &paint); 50 canvas->restore(); 51 } 52 53 virtual void onDraw(SkCanvas* canvas) { 54 if (!fInitialized) { 55 make_bitmap(); 56 fInitialized = true; 57 } 58 canvas->clear(0xFF101010); 59 SkPaint checkPaint; 60 checkPaint.setColor(0xFF202020); 61 for (int y = 0; y < HEIGHT; y += 16) { 62 for (int x = 0; x < WIDTH; x += 16) { 63 canvas->save(); 64 canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); 65 canvas->drawRect(SkRect::MakeXYWH(8, 0, 8, 8), checkPaint); 66 canvas->drawRect(SkRect::MakeXYWH(0, 8, 8, 8), checkPaint); 67 canvas->restore(); 68 } 69 } 70 SkPoint3 pointLocation(0, 0, SkIntToScalar(10)); 71 SkScalar azimuthRad = SkDegreesToRadians(SkIntToScalar(225)); 72 SkScalar elevationRad = SkDegreesToRadians(SkIntToScalar(5)); 73 SkPoint3 distantDirection(SkScalarMul(SkScalarCos(azimuthRad), SkScalarCos(elevationRad)), 74 SkScalarMul(SkScalarSin(azimuthRad), SkScalarCos(elevationRad)), 75 SkScalarSin(elevationRad)); 76 SkPoint3 spotLocation(SkIntToScalar(-10), SkIntToScalar(-10), SkIntToScalar(20)); 77 SkPoint3 spotTarget(SkIntToScalar(40), SkIntToScalar(40), 0); 78 SkScalar spotExponent = SK_Scalar1; 79 SkScalar cutoffAngle = SkIntToScalar(15); 80 SkScalar kd = SkIntToScalar(2); 81 SkScalar ks = SkIntToScalar(1); 82 SkScalar shininess = SkIntToScalar(8); 83 SkScalar surfaceScale = SkIntToScalar(1); 84 SkColor white(0xFFFFFFFF); 85 SkPaint paint; 86 paint.setImageFilter(SkLightingImageFilter::CreatePointLitDiffuse(pointLocation, white, surfaceScale, kd))->unref(); 87 drawClippedBitmap(canvas, paint, 0, 0); 88 paint.setImageFilter(SkLightingImageFilter::CreateDistantLitDiffuse(distantDirection, white, surfaceScale, kd))->unref(); 89 drawClippedBitmap(canvas, paint, 110, 0); 90 paint.setImageFilter(SkLightingImageFilter::CreateSpotLitDiffuse(spotLocation, spotTarget, spotExponent, cutoffAngle, white, surfaceScale, kd))->unref(); 91 drawClippedBitmap(canvas, paint, 220, 0); 92 paint.setImageFilter(SkLightingImageFilter::CreatePointLitSpecular(pointLocation, white, surfaceScale, ks, shininess))->unref(); 93 drawClippedBitmap(canvas, paint, 0, 110); 94 paint.setImageFilter(SkLightingImageFilter::CreateDistantLitSpecular(distantDirection, white, surfaceScale, ks, shininess))->unref(); 95 drawClippedBitmap(canvas, paint, 110, 110); 96 paint.setImageFilter(SkLightingImageFilter::CreateSpotLitSpecular(spotLocation, spotTarget, spotExponent, cutoffAngle, white, surfaceScale, ks, shininess))->unref(); 97 drawClippedBitmap(canvas, paint, 220, 110); 98 } 99 100 private: 101 typedef GM INHERITED; 102 SkBitmap fBitmap; 103 bool fInitialized; 104 }; 105 106 ////////////////////////////////////////////////////////////////////////////// 107 108 static GM* MyFactory(void*) { return new ImageLightingGM; } 109 static GMRegistry reg(MyFactory); 110 111 } 112