1 /* San Angeles Observation OpenGL ES version example
2 * Copyright 2009 The Android Open Source Project
3 * All rights reserved.
4 *
5 * This source is free software; you can redistribute it and/or
6 * modify it under the terms of EITHER:
7 * (1) The GNU Lesser General Public License as published by the Free
8 * Software Foundation; either version 2.1 of the License, or (at
9 * your option) any later version. The text of the GNU Lesser
10 * General Public License is included with this source in the
11 * file LICENSE-LGPL.txt.
12 * (2) The BSD-style license that is included with this source in
13 * the file LICENSE-BSD.txt.
14 *
15 * This source is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the files
18 * LICENSE-LGPL.txt and LICENSE-BSD.txt for more details.
19 */
20 #include <jni.h>
21 #include <sys/time.h>
22 #include <time.h>
23 #include <android/log.h>
24 #include <stdint.h>
25 #include "importgl.h"
26 #include "app.h"
27
28 int gAppAlive = 1;
29
30 static int sWindowWidth = 320;
31 static int sWindowHeight = 480;
32 static int sDemoStopped = 0;
33 static long sTimeOffset = 0;
34 static int sTimeOffsetInit = 0;
35 static long sTimeStopped = 0;
36
37 static long
_getTime(void)38 _getTime(void)
39 {
40 struct timeval now;
41
42 gettimeofday(&now, NULL);
43 return (long)(now.tv_sec*1000 + now.tv_usec/1000);
44 }
45
46 /* Call to initialize the graphics state */
47 void
Java_com_example_SanAngeles_DemoRenderer_nativeInit(JNIEnv * env)48 Java_com_example_SanAngeles_DemoRenderer_nativeInit( JNIEnv* env )
49 {
50 importGLInit();
51 appInit();
52 gAppAlive = 1;
53 }
54
55 void
Java_com_example_SanAngeles_DemoRenderer_nativeResize(JNIEnv * env,jobject thiz,jint w,jint h)56 Java_com_example_SanAngeles_DemoRenderer_nativeResize( JNIEnv* env, jobject thiz, jint w, jint h )
57 {
58 sWindowWidth = w;
59 sWindowHeight = h;
60 __android_log_print(ANDROID_LOG_INFO, "SanAngeles", "resize w=%d h=%d", w, h);
61 }
62
63 /* Call to finalize the graphics state */
64 void
Java_com_example_SanAngeles_DemoRenderer_nativeDone(JNIEnv * env)65 Java_com_example_SanAngeles_DemoRenderer_nativeDone( JNIEnv* env )
66 {
67 appDeinit();
68 importGLDeinit();
69 }
70
71 /* This is called to indicate to the render loop that it should
72 * stop as soon as possible.
73 */
74
_pause()75 void _pause()
76 {
77 /* we paused the animation, so store the current
78 * time in sTimeStopped for future nativeRender calls */
79 sDemoStopped = 1;
80 sTimeStopped = _getTime();
81 }
82
_resume()83 void _resume()
84 {
85 /* we resumed the animation, so adjust the time offset
86 * to take care of the pause interval. */
87 sDemoStopped = 0;
88 sTimeOffset -= _getTime() - sTimeStopped;
89 }
90
91
92 void
Java_com_example_SanAngeles_DemoGLSurfaceView_nativeTogglePauseResume(JNIEnv * env)93 Java_com_example_SanAngeles_DemoGLSurfaceView_nativeTogglePauseResume( JNIEnv* env )
94 {
95 sDemoStopped = !sDemoStopped;
96 if (sDemoStopped)
97 _pause();
98 else
99 _resume();
100 }
101
102 void
Java_com_example_SanAngeles_DemoGLSurfaceView_nativePause(JNIEnv * env)103 Java_com_example_SanAngeles_DemoGLSurfaceView_nativePause( JNIEnv* env )
104 {
105 _pause();
106 }
107
108 void
Java_com_example_SanAngeles_DemoGLSurfaceView_nativeResume(JNIEnv * env)109 Java_com_example_SanAngeles_DemoGLSurfaceView_nativeResume( JNIEnv* env )
110 {
111 _resume();
112 }
113
114 /* Call to render the next GL frame */
115 void
Java_com_example_SanAngeles_DemoRenderer_nativeRender(JNIEnv * env)116 Java_com_example_SanAngeles_DemoRenderer_nativeRender( JNIEnv* env )
117 {
118 long curTime;
119
120 /* NOTE: if sDemoStopped is TRUE, then we re-render the same frame
121 * on each iteration.
122 */
123 if (sDemoStopped) {
124 curTime = sTimeStopped + sTimeOffset;
125 } else {
126 curTime = _getTime() + sTimeOffset;
127 if (sTimeOffsetInit == 0) {
128 sTimeOffsetInit = 1;
129 sTimeOffset = -curTime;
130 curTime = 0;
131 }
132 }
133
134 //__android_log_print(ANDROID_LOG_INFO, "SanAngeles", "curTime=%ld", curTime);
135
136 appRender(curTime, sWindowWidth, sWindowHeight);
137 }
138