1
2 /*
3 * Copyright 2011 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 "SkView.h"
10 #include "SkCanvas.h"
11 #include "SkCamera.h"
12 #include "SkEmbossMaskFilter.h"
13 #include "SkGradientShader.h"
14 #include "SkPath.h"
15 #include "SkRegion.h"
16 #include "SkShader.h"
17 #include "SkUtils.h"
18 #include "SkRandom.h"
19 #include "SkImageDecoder.h"
20
21 class CameraView : public SampleView {
22 SkTDArray<SkShader*> fShaders;
23 int fShaderIndex;
24 bool fFrontFace;
25 public:
CameraView()26 CameraView() {
27 fRX = fRY = fRZ = 0;
28 fShaderIndex = 0;
29 fFrontFace = false;
30
31 for (int i = 0;; i++) {
32 SkString str;
33 str.printf("/skimages/elephant%d.jpeg", i);
34 SkBitmap bm;
35 if (SkImageDecoder::DecodeFile(str.c_str(), &bm)) {
36 SkShader* s = SkShader::CreateBitmapShader(bm,
37 SkShader::kClamp_TileMode,
38 SkShader::kClamp_TileMode);
39
40 SkRect src = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
41 SkRect dst = { -150, -150, 150, 150 };
42 SkMatrix matrix;
43 matrix.setRectToRect(src, dst, SkMatrix::kFill_ScaleToFit);
44 s->setLocalMatrix(matrix);
45 *fShaders.append() = s;
46 } else {
47 break;
48 }
49 }
50 this->setBGColor(0xFFDDDDDD);
51 }
52
~CameraView()53 virtual ~CameraView() {
54 fShaders.unrefAll();
55 }
56
57 protected:
58 // overrides from SkEventSink
onQuery(SkEvent * evt)59 virtual bool onQuery(SkEvent* evt) {
60 if (SampleCode::TitleQ(*evt))
61 {
62 SampleCode::TitleR(evt, "Camera");
63 return true;
64 }
65 return this->INHERITED::onQuery(evt);
66 }
67
onDrawContent(SkCanvas * canvas)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 SkRect r = { -150, -150, 150, 150 };
87 canvas->drawRoundRect(r, 30, 30, paint);
88 }
89
90 fRY += SampleCode::GetAnimSecondsDelta() * 90;
91 if (fRY >= SkIntToScalar(360)) {
92 fRY = 0;
93 }
94 this->inval(NULL);
95 }
96
97 private:
98 SkScalar fRX, fRY, fRZ;
99 typedef SampleView INHERITED;
100 };
101
102 //////////////////////////////////////////////////////////////////////////////
103
MyFactory()104 static SkView* MyFactory() { return new CameraView; }
105 static SkViewRegister reg(MyFactory);
106
107