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