/[pcsx2_0.9.7]/trunk/3rdparty/SDL-1.3.0-5387/test/testdyngles.c
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Contents of /trunk/3rdparty/SDL-1.3.0-5387/test/testdyngles.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: 5822 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 __IPHONEOS__
23 #define HAVE_OPENGLES
24 #endif
25
26 #ifdef HAVE_OPENGLES
27
28 #include "SDL_opengles.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 * glEnableClientState) (GLenum array);
54 void (APIENTRY * glDisableClientState) (GLenum array);
55 void (APIENTRY * glVertexPointer) (GLint size, GLenum type,
56 GLsizei stride,
57 const GLvoid * pointer);
58 void (APIENTRY * glDrawArrays) (GLenum mode, GLint first, GLsizei count);
59
60
61 void (APIENTRY * glClearColor) (GLfloat, GLfloat, GLfloat, GLfloat);
62 void (APIENTRY * glClear) (GLbitfield);
63 void (APIENTRY * glDisable) (GLenum);
64 void (APIENTRY * glEnable) (GLenum);
65 void (APIENTRY * glColor4f) (GLfloat, GLfloat, GLfloat, GLfloat);
66 void (APIENTRY * glPointSize) (GLfloat);
67 void (APIENTRY * glHint) (GLenum, GLenum);
68 void (APIENTRY * glBlendFunc) (GLenum, GLenum);
69 void (APIENTRY * glMatrixMode) (GLenum);
70 void (APIENTRY * glLoadIdentity) ();
71 void (APIENTRY * glOrthof) (GLfloat, GLfloat, GLfloat, GLfloat,
72 GLfloat, GLfloat);
73 void (APIENTRY * glRotatef) (GLfloat, GLfloat, GLfloat, GLfloat);
74 void (APIENTRY * glViewport) (GLint, GLint, GLsizei, GLsizei);
75 void (APIENTRY * glFogf) (GLenum, GLfloat);
76 }
77 glfuncs;
78
79 void
80 init_glfuncs(glfuncs * f)
81 {
82 f->glEnableClientState = get_funcaddr("glEnableClientState");
83 f->glDisableClientState = get_funcaddr("glDisableClientState");
84 f->glVertexPointer = get_funcaddr("glVertexPointer");
85 f->glDrawArrays = get_funcaddr("glDrawArrays");
86 f->glClearColor = get_funcaddr("glClearColor");
87 f->glClear = get_funcaddr("glClear");
88 f->glDisable = get_funcaddr("glDisable");
89 f->glEnable = get_funcaddr("glEnable");
90 f->glColor4f = get_funcaddr("glColor4f");
91 f->glPointSize = get_funcaddr("glPointSize");
92 f->glHint = get_funcaddr("glHint");
93 f->glBlendFunc = get_funcaddr("glBlendFunc");
94 f->glMatrixMode = get_funcaddr("glMatrixMode");
95 f->glLoadIdentity = get_funcaddr("glLoadIdentity");
96 f->glOrthof = get_funcaddr("glOrthof");
97 f->glRotatef = get_funcaddr("glRotatef");
98 f->glViewport = get_funcaddr("glViewport");
99 f->glFogf = get_funcaddr("glFogf");
100 }
101
102 #define NB_PIXELS 1000
103
104 int
105 main(int argc, char *argv[])
106 {
107 glfuncs f;
108 int i;
109 SDL_Event event;
110 int done = 0;
111 GLfloat pixels[NB_PIXELS * 3];
112 const char *gl_library = NULL; /* Use the default GL library */
113
114 int video_w, video_h;
115
116 /* you may want to change these according to the platform */
117 video_w = 320;
118 video_h = 480;
119
120 if (argv[1]) {
121 gl_library = argv[1];
122 }
123
124 if (SDL_Init(SDL_INIT_VIDEO) < 0) {
125 printf("Unable to init SDL : %s\n", SDL_GetError());
126 return (1);
127 }
128
129 if (SDL_GL_LoadLibrary(gl_library) < 0) {
130 printf("Unable to dynamically open GL ES lib : %s\n", SDL_GetError());
131 quit(1);
132 }
133
134 if (SDL_SetVideoMode(video_h, video_w, 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 ES Loading Test", "testdyngles");
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, video_w, video_h);
151 f.glMatrixMode(GL_PROJECTION);
152 f.glLoadIdentity();
153 f.glOrthof(-100, 100, -100, 100, -500, 500);
154
155 f.glMatrixMode(GL_MODELVIEW);
156 f.glLoadIdentity();
157
158 f.glEnable(GL_DEPTH_TEST);
159 f.glDisable(GL_TEXTURE_2D);
160 f.glEnable(GL_BLEND);
161 f.glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
162
163 f.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
164 f.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
165
166 f.glEnable(GL_POINT_SMOOTH);
167 f.glHint(GL_POINT_SMOOTH_HINT, GL_NICEST);
168 f.glPointSize(1.0f);
169 f.glEnable(GL_FOG);
170 f.glFogf(GL_FOG_START, -500);
171 f.glFogf(GL_FOG_END, 500);
172 f.glFogf(GL_FOG_DENSITY, 0.005);
173
174 f.glVertexPointer(3, GL_FLOAT, 0, pixels);
175 f.glEnableClientState(GL_VERTEX_ARRAY);
176
177 do {
178 f.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
179
180 f.glRotatef(2.0, 1.0, 1.0, 1.0);
181 f.glRotatef(1.0, 0.0, 1.0, 1.0);
182
183 f.glColor4f(1.0, 1.0, 1.0, 1.0);
184
185 f.glDrawArrays(GL_POINTS, 0, NB_PIXELS);
186
187 SDL_GL_SwapBuffers();
188
189 while (SDL_PollEvent(&event)) {
190 if (event.type == SDL_QUIT)
191 done = 1;
192 if (event.type == SDL_KEYDOWN)
193 done = 1;
194 }
195
196 SDL_Delay(20);
197 }
198 while (!done);
199
200 f.glDisableClientState(GL_VERTEX_ARRAY);
201
202 SDL_Quit();
203 return 0;
204 }
205
206 #else /* HAVE_OPENGLES */
207
208 int
209 main(int argc, char *argv[])
210 {
211 printf("No OpenGL ES support on this system\n");
212 return 1;
213 }
214
215 #endif /* HAVE_OPENGLES */

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