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
58using namespace android;
59
60#include "app.h"
61
62
63int gAppAlive = 1;
64
65static const char sAppName[] =
66        "San Angeles Observation OpenGL ES version example (Linux)";
67
68static int sWindowWidth = WINDOW_DEFAULT_WIDTH;
69static int sWindowHeight = WINDOW_DEFAULT_HEIGHT;
70static EGLDisplay sEglDisplay = EGL_NO_DISPLAY;
71static EGLContext sEglContext = EGL_NO_CONTEXT;
72static EGLSurface sEglSurface = EGL_NO_SURFACE;
73
74const 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
96void 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
105static 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
113static 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
121static int initGraphics(unsigned samples)
122{
123    EGLint configAttribs[] = {
124            EGL_DEPTH_SIZE, 16,
125            EGL_SAMPLE_BUFFERS, samples ? 1 : 0,
126                    EGL_SAMPLES, samples,
127                    EGL_NONE
128    };
129
130    EGLint majorVersion;
131    EGLint minorVersion;
132    EGLContext context;
133    EGLConfig config;
134    EGLSurface surface;
135    EGLint w, h;
136    EGLDisplay dpy;
137
138    EGLNativeWindowType window = android_createDisplaySurface();
139
140    dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
141    eglInitialize(dpy, &majorVersion, &minorVersion);
142
143    status_t err = EGLUtils::selectConfigForNativeWindow(
144            dpy, configAttribs, window, &config);
145    if (err) {
146        fprintf(stderr, "couldn't find an EGLConfig matching the screen format\n");
147        return 0;
148    }
149
150    surface = eglCreateWindowSurface(dpy, config, window, NULL);
151    egl_error("eglCreateWindowSurface");
152
153    fprintf(stderr,"surface = %p\n", surface);
154
155    context = eglCreateContext(dpy, config, NULL, NULL);
156    egl_error("eglCreateContext");
157    fprintf(stderr,"context = %p\n", context);
158
159    eglMakeCurrent(dpy, surface, surface, context);
160    egl_error("eglMakeCurrent");
161
162    eglQuerySurface(dpy, surface, EGL_WIDTH, &sWindowWidth);
163    eglQuerySurface(dpy, surface, EGL_HEIGHT, &sWindowHeight);
164
165    sEglDisplay = dpy;
166    sEglSurface = surface;
167    sEglContext = context;
168
169    if (samples == 0) {
170        // GL_MULTISAMPLE is enabled by default
171        glDisable(GL_MULTISAMPLE);
172    }
173
174    return EGL_TRUE;
175}
176
177
178static void deinitGraphics()
179{
180    eglMakeCurrent(sEglDisplay, NULL, NULL, NULL);
181    eglDestroyContext(sEglDisplay, sEglContext);
182    eglDestroySurface(sEglDisplay, sEglSurface);
183    eglTerminate(sEglDisplay);
184}
185
186
187int main(int argc, char *argv[])
188{
189    unsigned samples = 0;
190    printf("usage: %s [samples]\n", argv[0]);
191    if (argc == 2) {
192        samples = atoi( argv[1] );
193        printf("Multisample enabled: GL_SAMPLES = %u\n", samples);
194    }
195
196    if (!initGraphics(samples))
197    {
198        fprintf(stderr, "Graphics initialization failed.\n");
199        return EXIT_FAILURE;
200    }
201
202    appInit();
203
204    struct timeval timeTemp;
205    int frameCount = 0;
206    gettimeofday(&timeTemp, NULL);
207    double totalTime = timeTemp.tv_usec/1000000.0 + timeTemp.tv_sec;
208
209    while (gAppAlive)
210    {
211        struct timeval timeNow;
212
213        gettimeofday(&timeNow, NULL);
214        appRender(timeNow.tv_sec * 1000 + timeNow.tv_usec / 1000,
215                sWindowWidth, sWindowHeight);
216        checkGLErrors();
217        eglSwapBuffers(sEglDisplay, sEglSurface);
218        checkEGLErrors();
219        frameCount++;
220    }
221
222    gettimeofday(&timeTemp, NULL);
223
224    appDeinit();
225    deinitGraphics();
226
227    totalTime = (timeTemp.tv_usec/1000000.0 + timeTemp.tv_sec) - totalTime;
228    printf("totalTime=%f s, frameCount=%d, %.2f fps\n",
229            totalTime, frameCount, frameCount/totalTime);
230
231    return EXIT_SUCCESS;
232}
233