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 "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
21class CameraView : public SampleView {
22    SkTDArray<SkShader*> fShaders;
23    int     fShaderIndex;
24    bool    fFrontFace;
25public:
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                SkRect src = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
37                SkRect dst = { -150, -150, 150, 150 };
38                SkMatrix matrix;
39                matrix.setRectToRect(src, dst, SkMatrix::kFill_ScaleToFit);
40
41                SkShader* s = SkShader::CreateBitmapShader(bm,
42                                                           SkShader::kClamp_TileMode,
43                                                           SkShader::kClamp_TileMode,
44                                                           &matrix);
45                *fShaders.append() = s;
46            } else {
47                break;
48            }
49        }
50        this->setBGColor(0xFFDDDDDD);
51    }
52
53    virtual ~CameraView() {
54        fShaders.unrefAll();
55    }
56
57protected:
58    // overrides from SkEventSink
59    virtual bool onQuery(SkEvent* evt) {
60        if (SampleCode::TitleQ(*evt)) {
61            SampleCode::TitleR(evt, "Camera");
62            return true;
63        }
64        return this->INHERITED::onQuery(evt);
65    }
66
67    virtual void onDrawContent(SkCanvas* canvas) {
68        canvas->translate(this->width()/2, this->height()/2);
69
70        Sk3DView    view;
71        view.rotateX(fRX);
72        view.rotateY(fRY);
73        view.applyToCanvas(canvas);
74
75        SkPaint paint;
76        if (fShaders.count() > 0) {
77            bool frontFace = view.dotWithNormal(0, 0, SK_Scalar1) < 0;
78            if (frontFace != fFrontFace) {
79                fFrontFace = frontFace;
80                fShaderIndex = (fShaderIndex + 1) % fShaders.count();
81            }
82
83            paint.setAntiAlias(true);
84            paint.setShader(fShaders[fShaderIndex]);
85            paint.setFilterLevel(SkPaint::kLow_FilterLevel);
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
97private:
98    SkScalar fRX, fRY, fRZ;
99    typedef SampleView INHERITED;
100};
101
102//////////////////////////////////////////////////////////////////////////////
103
104static SkView* MyFactory() { return new CameraView; }
105static SkViewRegister reg(MyFactory);
106