1 /* San Angeles Observation OpenGL ES version example
2 * Copyright 2004-2005 Jetro Lauha
3 * All rights reserved.
4 * Web: http://iki.fi/jetro/
5 *
6 * This source is free software; you can redistribute it and/or
7 * modify it under the terms of EITHER:
8 * (1) The GNU Lesser General Public License as published by the Free
9 * Software Foundation; either version 2.1 of the License, or (at
10 * your option) any later version. The text of the GNU Lesser
11 * General Public License is included with this source in the
12 * file LICENSE-LGPL.txt.
13 * (2) The BSD-style license that is included with this source in
14 * the file LICENSE-BSD.txt.
15 *
16 * This source is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the files
19 * LICENSE-LGPL.txt and LICENSE-BSD.txt for more details.
20 *
21 * $Id: app-linux.c,v 1.4 2005/02/08 18:42:48 tonic Exp $
22 * $Revision: 1.4 $
23 *
24 * Parts of this source file is based on test/example code from
25 * GLESonGL implementation by David Blythe. Here is copy of the
26 * license notice from that source:
27 *
28 * Copyright (C) 2003 David Blythe All Rights Reserved.
29 *
30 * Permission is hereby granted, free of charge, to any person obtaining a
31 * copy of this software and associated documentation files (the "Software"),
32 * to deal in the Software without restriction, including without limitation
33 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
34 * and/or sell copies of the Software, and to permit persons to whom the
35 * Software is furnished to do so, subject to the following conditions:
36 *
37 * The above copyright notice and this permission notice shall be included
38 * in all copies or substantial portions of the Software.
39 *
40 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
41 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
42 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
43 * DAVID BLYTHE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
44 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
45 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
46 */
47
48 #include <stdlib.h>
49 #include <stdio.h>
50 #include <sys/time.h>
51
52 #include <EGL/egl.h>
53 #include <GLES/gl.h>
54
55 #include <ui/FramebufferNativeWindow.h>
56 #include <ui/EGLUtils.h>
57
58 using namespace android;
59
60 #include "app.h"
61
62
63 int gAppAlive = 1;
64
65 static const char sAppName[] =
66 "San Angeles Observation OpenGL ES version example (Linux)";
67
68 static int sWindowWidth = WINDOW_DEFAULT_WIDTH;
69 static int sWindowHeight = WINDOW_DEFAULT_HEIGHT;
70 static EGLDisplay sEglDisplay = EGL_NO_DISPLAY;
71 static EGLContext sEglContext = EGL_NO_CONTEXT;
72 static EGLSurface sEglSurface = EGL_NO_SURFACE;
73
egl_strerror(unsigned err)74 const char *egl_strerror(unsigned err)
75 {
76 switch(err){
77 case EGL_SUCCESS: return "SUCCESS";
78 case EGL_NOT_INITIALIZED: return "NOT INITIALIZED";
79 case EGL_BAD_ACCESS: return "BAD ACCESS";
80 case EGL_BAD_ALLOC: return "BAD ALLOC";
81 case EGL_BAD_ATTRIBUTE: return "BAD_ATTRIBUTE";
82 case EGL_BAD_CONFIG: return "BAD CONFIG";
83 case EGL_BAD_CONTEXT: return "BAD CONTEXT";
84 case EGL_BAD_CURRENT_SURFACE: return "BAD CURRENT SURFACE";
85 case EGL_BAD_DISPLAY: return "BAD DISPLAY";
86 case EGL_BAD_MATCH: return "BAD MATCH";
87 case EGL_BAD_NATIVE_PIXMAP: return "BAD NATIVE PIXMAP";
88 case EGL_BAD_NATIVE_WINDOW: return "BAD NATIVE WINDOW";
89 case EGL_BAD_PARAMETER: return "BAD PARAMETER";
90 case EGL_BAD_SURFACE: return "BAD_SURFACE";
91 // case EGL_CONTEXT_LOST: return "CONTEXT LOST";
92 default: return "UNKNOWN";
93 }
94 }
95
egl_error(const char * name)96 void egl_error(const char *name)
97 {
98 unsigned err = eglGetError();
99 if(err != EGL_SUCCESS) {
100 fprintf(stderr,"%s(): egl error 0x%x (%s)\n",
101 name, err, egl_strerror(err));
102 }
103 }
104
checkGLErrors()105 static void checkGLErrors()
106 {
107 GLenum error = glGetError();
108 if (error != GL_NO_ERROR)
109 fprintf(stderr, "GL Error: 0x%04x\n", (int)error);
110 }
111
112
checkEGLErrors()113 static void checkEGLErrors()
114 {
115 EGLint error = eglGetError();
116 // GLESonGL seems to be returning 0 when there is no errors?
117 if (error && error != EGL_SUCCESS)
118 fprintf(stderr, "EGL Error: 0x%04x\n", (int)error);
119 }
120
initGraphics()121 static int initGraphics()
122 {
123 EGLint configAttribs[] = {
124 EGL_DEPTH_SIZE, 16,
125 EGL_NONE
126 };
127
128 EGLint majorVersion;
129 EGLint minorVersion;
130 EGLContext context;
131 EGLConfig config;
132 EGLSurface surface;
133 EGLint w, h;
134 EGLDisplay dpy;
135
136 EGLNativeWindowType window = android_createDisplaySurface();
137
138 dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
139 eglInitialize(dpy, &majorVersion, &minorVersion);
140
141 status_t err = EGLUtils::selectConfigForNativeWindow(
142 dpy, configAttribs, window, &config);
143 if (err) {
144 fprintf(stderr, "couldn't find an EGLConfig matching the screen format\n");
145 return 0;
146 }
147
148 surface = eglCreateWindowSurface(dpy, config, window, NULL);
149 egl_error("eglCreateWindowSurface");
150
151 fprintf(stderr,"surface = %p\n", surface);
152
153 context = eglCreateContext(dpy, config, NULL, NULL);
154 egl_error("eglCreateContext");
155 fprintf(stderr,"context = %p\n", context);
156
157 eglMakeCurrent(dpy, surface, surface, context);
158 egl_error("eglMakeCurrent");
159
160 eglQuerySurface(dpy, surface, EGL_WIDTH, &sWindowWidth);
161 eglQuerySurface(dpy, surface, EGL_HEIGHT, &sWindowHeight);
162
163 sEglDisplay = dpy;
164 sEglSurface = surface;
165 sEglContext = context;
166
167 return EGL_TRUE;
168 }
169
170
deinitGraphics()171 static void deinitGraphics()
172 {
173 eglMakeCurrent(sEglDisplay, NULL, NULL, NULL);
174 eglDestroyContext(sEglDisplay, sEglContext);
175 eglDestroySurface(sEglDisplay, sEglSurface);
176 eglTerminate(sEglDisplay);
177 }
178
179
main(int argc,char * argv[])180 int main(int argc, char *argv[])
181 {
182 // not referenced:
183 argc = argc;
184 argv = argv;
185
186 if (!initGraphics())
187 {
188 fprintf(stderr, "Graphics initialization failed.\n");
189 return EXIT_FAILURE;
190 }
191
192 appInit();
193
194 while (gAppAlive)
195 {
196 struct timeval timeNow;
197
198 if (gAppAlive)
199 {
200 gettimeofday(&timeNow, NULL);
201 appRender(timeNow.tv_sec * 1000 + timeNow.tv_usec / 1000,
202 sWindowWidth, sWindowHeight);
203 checkGLErrors();
204 eglSwapBuffers(sEglDisplay, sEglSurface);
205 checkEGLErrors();
206 }
207 }
208
209 appDeinit();
210 deinitGraphics();
211
212 return EXIT_SUCCESS;
213 }
214