/[pcsx2_0.9.7]/trunk/3rdparty/SDL-1.3.0-5387/test/testdyngl.c
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Contents of /trunk/3rdparty/SDL-1.3.0-5387/test/testdyngl.c

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Revision 401 - (show annotations) (download)
Fri Feb 25 17:31:09 2011 UTC (9 years, 9 months ago) by william
File MIME type: text/plain
File size: 5720 byte(s)
Auto Commited Import of: pcsx2-0.9.7-DEBUG (upstream: v0.9.7.4358 local: v0.9.7.313-latest) in ./trunk
1 /*
2 * Small SDL example to demonstrate dynamically loading
3 * OpenGL lib and functions
4 *
5 * (FYI it was supposed to look like snow in the wind or something...)
6 *
7 * Compile with :
8 * gcc testdyngl.c `sdl-config --libs --cflags` -o testdyngl -DHAVE_OPENGL
9 *
10 * You can specify a different OpenGL lib on the command line, i.e. :
11 * ./testdyngl /usr/X11R6/lib/libGL.so.1.2
12 * or
13 * ./testdyngl /usr/lib/libGL.so.1.0.4496
14 *
15 */
16
17 #include <stdio.h>
18 #include <stdlib.h>
19
20 #include "SDL.h"
21
22 #ifdef __MACOS__
23 #define HAVE_OPENGL
24 #endif
25
26 #ifdef HAVE_OPENGL
27
28 #include "SDL_opengl.h"
29
30 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
31 static void
32 quit(int rc)
33 {
34 SDL_Quit();
35 exit(rc);
36 }
37
38 void *
39 get_funcaddr(const char *p)
40 {
41 void *f = SDL_GL_GetProcAddress(p);
42 if (f) {
43 return f;
44 } else {
45 printf("Unable to get function pointer for %s\n", p);
46 quit(1);
47 }
48 return NULL;
49 }
50
51 typedef struct
52 {
53 void (APIENTRY * glBegin) (GLenum);
54 void (APIENTRY * glEnd) ();
55 void (APIENTRY * glVertex3f) (GLfloat, GLfloat, GLfloat);
56 void (APIENTRY * glClearColor) (GLfloat, GLfloat, GLfloat, GLfloat);
57 void (APIENTRY * glClear) (GLbitfield);
58 void (APIENTRY * glDisable) (GLenum);
59 void (APIENTRY * glEnable) (GLenum);
60 void (APIENTRY * glColor4ub) (GLubyte, GLubyte, GLubyte, GLubyte);
61 void (APIENTRY * glPointSize) (GLfloat);
62 void (APIENTRY * glHint) (GLenum, GLenum);
63 void (APIENTRY * glBlendFunc) (GLenum, GLenum);
64 void (APIENTRY * glMatrixMode) (GLenum);
65 void (APIENTRY * glLoadIdentity) ();
66 void (APIENTRY * glOrtho) (GLdouble, GLdouble, GLdouble, GLdouble,
67 GLdouble, GLdouble);
68 void (APIENTRY * glRotatef) (GLfloat, GLfloat, GLfloat, GLfloat);
69 void (APIENTRY * glViewport) (GLint, GLint, GLsizei, GLsizei);
70 void (APIENTRY * glFogf) (GLenum, GLfloat);
71 const GLubyte* (APIENTRY * glGetString) (GLenum);
72 }
73 glfuncs;
74
75 void
76 init_glfuncs(glfuncs * f)
77 {
78 f->glBegin = get_funcaddr("glBegin");
79 f->glEnd = get_funcaddr("glEnd");
80 f->glVertex3f = get_funcaddr("glVertex3f");
81 f->glClearColor = get_funcaddr("glClearColor");
82 f->glClear = get_funcaddr("glClear");
83 f->glDisable = get_funcaddr("glDisable");
84 f->glEnable = get_funcaddr("glEnable");
85 f->glColor4ub = get_funcaddr("glColor4ub");
86 f->glPointSize = get_funcaddr("glPointSize");
87 f->glHint = get_funcaddr("glHint");
88 f->glBlendFunc = get_funcaddr("glBlendFunc");
89 f->glMatrixMode = get_funcaddr("glMatrixMode");
90 f->glLoadIdentity = get_funcaddr("glLoadIdentity");
91 f->glOrtho = get_funcaddr("glOrtho");
92 f->glRotatef = get_funcaddr("glRotatef");
93 f->glViewport = get_funcaddr("glViewport");
94 f->glFogf = get_funcaddr("glFogf");
95 f->glGetString = get_funcaddr("glGetString");
96
97 printf("Vendor : %s\n", f->glGetString(GL_VENDOR));
98 printf("Renderer : %s\n", f->glGetString(GL_RENDERER));
99 printf("Version : %s\n", f->glGetString(GL_VERSION));
100 printf("Extensions : %s\n", f->glGetString(GL_EXTENSIONS));
101 }
102
103 #define NB_PIXELS 1000
104
105 int
106 main(int argc, char *argv[])
107 {
108 glfuncs f;
109 int i;
110 SDL_Event event;
111 int done = 0;
112 GLfloat pixels[NB_PIXELS * 3];
113 const char *gl_library = NULL; /* Use the default GL library */
114
115 if (argv[1]) {
116 gl_library = argv[1];
117 }
118
119 if (SDL_Init(SDL_INIT_VIDEO) < 0) {
120 printf("Unable to init SDL : %s\n", SDL_GetError());
121 return (1);
122 }
123
124 if (SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1) < 0) {
125 printf("Unable to set GL attribute : %s\n", SDL_GetError());
126 quit(1);
127 }
128
129 if (SDL_GL_LoadLibrary(gl_library) < 0) {
130 printf("Unable to dynamically open GL lib : %s\n", SDL_GetError());
131 quit(1);
132 }
133
134 if (SDL_SetVideoMode(640, 480, 0, SDL_OPENGL) == NULL) {
135 printf("Unable to open video mode : %s\n", SDL_GetError());
136 quit(1);
137 }
138
139 /* Set the window manager title bar */
140 SDL_WM_SetCaption("SDL Dynamic OpenGL Loading Test", "testdyngl");
141
142 init_glfuncs(&f);
143
144 for (i = 0; i < NB_PIXELS; i++) {
145 pixels[3 * i] = rand() % 250 - 125;
146 pixels[3 * i + 1] = rand() % 250 - 125;
147 pixels[3 * i + 2] = rand() % 250 - 125;
148 }
149
150 f.glViewport(0, 0, 640, 480);
151
152 f.glMatrixMode(GL_PROJECTION);
153 f.glLoadIdentity();
154 f.glOrtho(-100, 100, -100, 100, -500, 500);
155
156 f.glMatrixMode(GL_MODELVIEW);
157 f.glLoadIdentity();
158
159 f.glEnable(GL_DEPTH_TEST);
160 f.glDisable(GL_TEXTURE_2D);
161 f.glEnable(GL_BLEND);
162 f.glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
163
164 f.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
165 f.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
166
167 f.glEnable(GL_POINT_SMOOTH);
168 f.glHint(GL_POINT_SMOOTH_HINT, GL_NICEST);
169 f.glPointSize(5.0f);
170 f.glEnable(GL_FOG);
171 f.glFogf(GL_FOG_START, -500);
172 f.glFogf(GL_FOG_END, 500);
173 f.glFogf(GL_FOG_DENSITY, 0.005);
174
175 do {
176 f.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
177
178 f.glRotatef(2.0, 1.0, 1.0, 1.0);
179 f.glRotatef(1.0, 0.0, 1.0, 1.0);
180
181 f.glColor4ub(255, 255, 255, 255);
182 f.glBegin(GL_POINTS);
183 for (i = 0; i < NB_PIXELS; i++) {
184 f.glVertex3f(pixels[3 * i], pixels[3 * i + 1], pixels[3 * i + 2]);
185 }
186 f.glEnd();
187 SDL_GL_SwapBuffers();
188
189 while (SDL_PollEvent(&event)) {
190 if (event.type == SDL_KEYDOWN)
191 done = 1;
192 }
193
194 SDL_Delay(20);
195 } while (!done);
196
197 SDL_Quit();
198 return 0;
199 }
200
201 #else /* HAVE_OPENGL */
202
203 int
204 main(int argc, char *argv[])
205 {
206 printf("No OpenGL support on this system\n");
207 return 1;
208 }
209
210 #endif /* HAVE_OPENGL */

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