1 2/* 3 * Copyright 2015 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8#include "SampleCode.h" 9#include "Resources.h" 10 11#include "SkCanvas.h" 12#include "SkImageDecoder.h" 13#include "SkLightingShader.h" 14#include "SkPoint3.h" 15 16static const SkLightingShader::Lights* create_lights(SkScalar angle, SkScalar blue) { 17 18 const SkVector3 dir = SkVector3::Make(SkScalarSin(angle)*SkScalarSin(SK_ScalarPI*0.25f), 19 SkScalarCos(angle)*SkScalarSin(SK_ScalarPI*0.25f), 20 SkScalarCos(SK_ScalarPI*0.25f)); 21 22 SkLightingShader::Lights::Builder builder; 23 24 builder.add(SkLight(SkColor3f::Make(1.0f, 1.0f, blue), dir)); 25 builder.add(SkLight(SkColor3f::Make(0.1f, 0.1f, 0.1f))); 26 27 return builder.finish(); 28} 29 30//////////////////////////////////////////////////////////////////////////// 31 32class LightingView : public SampleView { 33public: 34 SkAutoTUnref<SkShader> fShader; 35 SkBitmap fDiffuseBitmap; 36 SkBitmap fNormalBitmap; 37 SkScalar fLightAngle; 38 SkScalar fColorFactor; 39 40 LightingView() { 41 SkString diffusePath = GetResourcePath("brickwork-texture.jpg"); 42 SkImageDecoder::DecodeFile(diffusePath.c_str(), &fDiffuseBitmap); 43 SkString normalPath = GetResourcePath("brickwork_normal-map.jpg"); 44 SkImageDecoder::DecodeFile(normalPath.c_str(), &fNormalBitmap); 45 46 fLightAngle = 0.0f; 47 fColorFactor = 0.0f; 48 49 SkAutoTUnref<const SkLightingShader::Lights> lights(create_lights(fLightAngle, 1.0f)); 50 51 fShader.reset(SkLightingShader::Create(fDiffuseBitmap, fNormalBitmap, 52 lights, SkVector::Make(1.0f, 0.0f), 53 nullptr, nullptr)); 54 } 55 56 virtual ~LightingView() {} 57 58protected: 59 // overrides from SkEventSink 60 bool onQuery(SkEvent* evt) override { 61 if (SampleCode::TitleQ(*evt)) { 62 SampleCode::TitleR(evt, "Lighting"); 63 return true; 64 } 65 return this->INHERITED::onQuery(evt); 66 } 67 68 void onDrawContent(SkCanvas* canvas) override { 69 fLightAngle += 0.015f; 70 fColorFactor += 0.01f; 71 if (fColorFactor > 1.0f) { 72 fColorFactor = 0.0f; 73 } 74 75 SkAutoTUnref<const SkLightingShader::Lights> lights(create_lights(fLightAngle, 76 fColorFactor)); 77 78 fShader.reset(SkLightingShader::Create(fDiffuseBitmap, fNormalBitmap, 79 lights, SkVector::Make(1.0f, 0.0f), 80 nullptr, nullptr)); 81 82 SkPaint paint; 83 paint.setShader(fShader); 84 paint.setColor(SK_ColorBLACK); 85 86 SkRect r = SkRect::MakeWH((SkScalar)fDiffuseBitmap.width(), 87 (SkScalar)fDiffuseBitmap.height()); 88 canvas->drawRect(r, paint); 89 90 // so we're constantly updating 91 this->inval(nullptr); 92 } 93 94 SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) override { 95 this->inval(nullptr); 96 return this->INHERITED::onFindClickHandler(x, y, modi); 97 } 98 99private: 100 typedef SampleView INHERITED; 101}; 102 103////////////////////////////////////////////////////////////////////////////// 104 105static SkView* MyFactory() { return new LightingView; } 106static SkViewRegister reg(MyFactory); 107