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 "DecodeFile.h"
9 #include "SampleCode.h"
10 #include "SkAnimTimer.h"
11 #include "SkView.h"
12 #include "SkCanvas.h"
13 #include "SkCamera.h"
14 #include "SkEmbossMaskFilter.h"
15 #include "SkGradientShader.h"
16 #include "SkPath.h"
17 #include "SkRegion.h"
18 #include "SkShader.h"
19 #include "SkUtils.h"
20 #include "SkRandom.h"
21
22 class CameraView : public SampleView {
23 SkTArray<sk_sp<SkShader>> fShaders;
24 int fShaderIndex;
25 bool fFrontFace;
26 public:
CameraView()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 (decode_file(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 fShaders.push_back(SkShader::MakeBitmapShader(bm,
43 SkShader::kClamp_TileMode,
44 SkShader::kClamp_TileMode,
45 &matrix));
46 } else {
47 break;
48 }
49 }
50 this->setBGColor(0xFFDDDDDD);
51 }
52
53 protected:
54 // overrides from SkEventSink
onQuery(SkEvent * evt)55 bool onQuery(SkEvent* evt) override {
56 if (SampleCode::TitleQ(*evt)) {
57 SampleCode::TitleR(evt, "Camera");
58 return true;
59 }
60 return this->INHERITED::onQuery(evt);
61 }
62
onDrawContent(SkCanvas * canvas)63 void onDrawContent(SkCanvas* canvas) override {
64 canvas->translate(this->width()/2, this->height()/2);
65
66 Sk3DView view;
67 view.rotateX(fRX);
68 view.rotateY(fRY);
69 view.applyToCanvas(canvas);
70
71 SkPaint paint;
72 if (fShaders.count() > 0) {
73 bool frontFace = view.dotWithNormal(0, 0, SK_Scalar1) < 0;
74 if (frontFace != fFrontFace) {
75 fFrontFace = frontFace;
76 fShaderIndex = (fShaderIndex + 1) % fShaders.count();
77 }
78
79 paint.setAntiAlias(true);
80 paint.setShader(fShaders[fShaderIndex]);
81 paint.setFilterQuality(kLow_SkFilterQuality);
82 SkRect r = { -150, -150, 150, 150 };
83 canvas->drawRoundRect(r, 30, 30, paint);
84 }
85 }
86
onAnimate(const SkAnimTimer & timer)87 bool onAnimate(const SkAnimTimer& timer) override {
88 if (timer.isStopped()) {
89 fRY = 0;
90 } else {
91 fRY = timer.scaled(90, 360);
92 }
93 return true;
94 }
95
96 private:
97 SkScalar fRX, fRY, fRZ;
98 typedef SampleView INHERITED;
99 };
100
101 //////////////////////////////////////////////////////////////////////////////
102
MyFactory()103 static SkView* MyFactory() { return new CameraView; }
104 static SkViewRegister reg(MyFactory);
105