1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.shaderstest;
18
19import android.content.Context;
20import android.renderscript.RSSurfaceView;
21import android.renderscript.RenderScriptGL;
22import android.view.MotionEvent;
23import android.view.ScaleGestureDetector;
24import android.view.SurfaceHolder;
25
26public class ShadersTestView extends RSSurfaceView {
27
28    private RenderScriptGL mRS;
29    private ShadersTestRS mRender;
30
31    private ScaleGestureDetector mScaleDetector;
32
33    private static final int INVALID_POINTER_ID = -1;
34    private int mActivePointerId = INVALID_POINTER_ID;
35
36    public ShadersTestView(Context context) {
37        super(context);
38        ensureRenderScript();
39        mScaleDetector = new ScaleGestureDetector(context, new ScaleListener());
40    }
41
42    private void ensureRenderScript() {
43        if (mRS == null) {
44            RenderScriptGL.SurfaceConfig sc = new RenderScriptGL.SurfaceConfig();
45            sc.setDepth(16, 24);
46            mRS = createRenderScriptGL(sc);
47            mRender = new ShadersTestRS();
48            mRender.init(mRS, getResources());
49        }
50    }
51
52    @Override
53    protected void onAttachedToWindow() {
54        super.onAttachedToWindow();
55        ensureRenderScript();
56    }
57
58    @Override
59    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
60        super.surfaceChanged(holder, format, w, h);
61        mRender.surfaceChanged();
62    }
63
64    @Override
65    protected void onDetachedFromWindow() {
66        mRender = null;
67        if (mRS != null) {
68            mRS = null;
69            destroyRenderScriptGL();
70        }
71    }
72
73    @Override
74    public boolean onTouchEvent(MotionEvent ev) {
75        mScaleDetector.onTouchEvent(ev);
76
77        boolean ret = false;
78        float x = ev.getX();
79        float y = ev.getY();
80
81        final int action = ev.getAction();
82
83        switch (action & MotionEvent.ACTION_MASK) {
84        case MotionEvent.ACTION_DOWN: {
85            mRender.onActionDown(x, y);
86            mActivePointerId = ev.getPointerId(0);
87            ret = true;
88            break;
89        }
90        case MotionEvent.ACTION_MOVE: {
91            if (!mScaleDetector.isInProgress()) {
92                mRender.onActionMove(x, y);
93            }
94            mRender.onActionDown(x, y);
95            ret = true;
96            break;
97        }
98
99        case MotionEvent.ACTION_UP: {
100            mActivePointerId = INVALID_POINTER_ID;
101            break;
102        }
103
104        case MotionEvent.ACTION_CANCEL: {
105            mActivePointerId = INVALID_POINTER_ID;
106            break;
107        }
108
109        case MotionEvent.ACTION_POINTER_UP: {
110            final int pointerIndex = (ev.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK)
111                    >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
112            final int pointerId = ev.getPointerId(pointerIndex);
113            if (pointerId == mActivePointerId) {
114                // This was our active pointer going up. Choose a new
115                // active pointer and adjust accordingly.
116                final int newPointerIndex = pointerIndex == 0 ? 1 : 0;
117                x = ev.getX(newPointerIndex);
118                y = ev.getY(newPointerIndex);
119                mRender.onActionDown(x, y);
120                mActivePointerId = ev.getPointerId(newPointerIndex);
121            }
122            break;
123        }
124        }
125
126        return ret;
127    }
128
129    private class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
130        @Override
131        public boolean onScale(ScaleGestureDetector detector) {
132            mRender.onActionScale(detector.getScaleFactor());
133            return true;
134        }
135    }
136}
137
138
139