1/* 2 * Copyright 2011 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 "SampleCode.h" 9#include "SkAnimTimer.h" 10#include "SkView.h" 11#include "SkCanvas.h" 12#include "SkCamera.h" 13#include "SkEmbossMaskFilter.h" 14#include "SkGradientShader.h" 15#include "SkPath.h" 16#include "SkRegion.h" 17#include "SkShader.h" 18#include "SkUtils.h" 19#include "SkRandom.h" 20#include "SkImageDecoder.h" 21 22class CameraView : public SampleView { 23 SkTDArray<SkShader*> fShaders; 24 int fShaderIndex; 25 bool fFrontFace; 26public: 27 CameraView() { 28 fRX = fRY = fRZ = 0; 29 fShaderIndex = 0; 30 fFrontFace = false; 31 32 for (int i = 0;; i++) { 33 SkString str; 34 str.printf("/skimages/elephant%d.jpeg", i); 35 SkBitmap bm; 36 if (SkImageDecoder::DecodeFile(str.c_str(), &bm)) { 37 SkRect src = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) }; 38 SkRect dst = { -150, -150, 150, 150 }; 39 SkMatrix matrix; 40 matrix.setRectToRect(src, dst, SkMatrix::kFill_ScaleToFit); 41 42 SkShader* s = SkShader::CreateBitmapShader(bm, 43 SkShader::kClamp_TileMode, 44 SkShader::kClamp_TileMode, 45 &matrix); 46 *fShaders.append() = s; 47 } else { 48 break; 49 } 50 } 51 this->setBGColor(0xFFDDDDDD); 52 } 53 54 virtual ~CameraView() { 55 fShaders.unrefAll(); 56 } 57 58protected: 59 // overrides from SkEventSink 60 virtual bool onQuery(SkEvent* evt) { 61 if (SampleCode::TitleQ(*evt)) { 62 SampleCode::TitleR(evt, "Camera"); 63 return true; 64 } 65 return this->INHERITED::onQuery(evt); 66 } 67 68 virtual void onDrawContent(SkCanvas* canvas) { 69 canvas->translate(this->width()/2, this->height()/2); 70 71 Sk3DView view; 72 view.rotateX(fRX); 73 view.rotateY(fRY); 74 view.applyToCanvas(canvas); 75 76 SkPaint paint; 77 if (fShaders.count() > 0) { 78 bool frontFace = view.dotWithNormal(0, 0, SK_Scalar1) < 0; 79 if (frontFace != fFrontFace) { 80 fFrontFace = frontFace; 81 fShaderIndex = (fShaderIndex + 1) % fShaders.count(); 82 } 83 84 paint.setAntiAlias(true); 85 paint.setShader(fShaders[fShaderIndex]); 86 paint.setFilterQuality(kLow_SkFilterQuality); 87 SkRect r = { -150, -150, 150, 150 }; 88 canvas->drawRoundRect(r, 30, 30, paint); 89 } 90 } 91 92 bool onAnimate(const SkAnimTimer& timer) override { 93 if (timer.isStopped()) { 94 fRY = 0; 95 } else { 96 fRY = timer.scaled(90, 360); 97 } 98 return true; 99 } 100 101private: 102 SkScalar fRX, fRY, fRZ; 103 typedef SampleView INHERITED; 104}; 105 106////////////////////////////////////////////////////////////////////////////// 107 108static SkView* MyFactory() { return new CameraView; } 109static SkViewRegister reg(MyFactory); 110