sgl: src/wsys_glut.c annotate

sgl

annotate src/wsys_glut.c @ 20:0697fbd075b6

added fallback SDL module

author	John Tsiombikas <nuclear@member.fsf.org>
date	Sun, 26 Jun 2011 07:56:13 +0300
parents	e989ab58ec5b
children

rev	line source
nuclear@7	1 /* SimplyGL window system module for GLUT */
nuclear@7	2 /* link-with: -lglut */
nuclear@10	3 /* mac-framework: -framework GLUT */
nuclear@7	4
nuclear@7	5 #include "config.h"
nuclear@7	6
nuclear@7	7 #ifdef USE_WSYS_MODULE_GLUT
nuclear@7	8
nuclear@12	9 #include <stdlib.h>
nuclear@7	10 #include <setjmp.h>
nuclear@7	11 #ifndef __APPLE__
nuclear@7	12 #include <GL/glut.h>
nuclear@7	13 #ifdef FREEGLUT
nuclear@7	14 #include <GL/freeglut_ext.h>
nuclear@7	15 #endif /* freeglut */
nuclear@7	16
nuclear@7	17 #else /* apple */
nuclear@7	18 #include <GLUT/glut.h>
nuclear@7	19 #endif
nuclear@7	20
nuclear@7	21 #include "sgl.h"
nuclear@7	22 #include "wsys.h"
nuclear@7	23
nuclear@7	24 struct window {
nuclear@7	25 int id;
nuclear@7	26 struct window *next;
nuclear@7	27 };
nuclear@7	28
nuclear@7	29 static int init(void);
nuclear@7	30 static void shutdown(void);
nuclear@7	31
nuclear@7	32 /* video mode switching */
nuclear@7	33 static int set_vidmode(int xsz, int ysz);
nuclear@7	34 static int get_vidmode(int xsz, int ysz);
nuclear@7	35
nuclear@7	36 /* create/destroy windows */
nuclear@7	37 static int create_window(int xsz, int ysz, unsigned int flags);
nuclear@7	38 static void close_window(int id);
nuclear@7	39
nuclear@7	40 /* window management */
nuclear@7	41 static int set_active(int id);
nuclear@7	42 static int set_title(const char *str);
nuclear@7	43 static void redisplay(void);
nuclear@7	44 static void swap_buffers(void);
nuclear@7	45
nuclear@7	46 static int get_modifiers(void);
nuclear@7	47
nuclear@7	48 /* event handling and friends */
nuclear@7	49 static void set_event(int idx, int enable);
nuclear@7	50 static int process_events(void);
nuclear@7	51
nuclear@7	52 /* callbacks */
nuclear@7	53 static void disp_cb(void);
nuclear@7	54 static void reshape_cb(int x, int y);
nuclear@7	55 static void keyb_down_cb(unsigned char c, int x, int y);
nuclear@7	56 static void keyb_up_cb(unsigned char c, int x, int y);
nuclear@7	57 static void special_down_cb(int c, int x, int y);
nuclear@7	58 static void special_up_cb(int c, int x, int y);
nuclear@7	59 static void mouse_cb(int bn, int state, int x, int y);
nuclear@7	60 static void motion_cb(int x, int y);
nuclear@7	61 static void passive_cb(int x, int y);
nuclear@7	62 static void idle_cb(void);
nuclear@7	63
nuclear@7	64
nuclear@7	65 static struct wsys_module ws = {
nuclear@20	66 "glut", 5,
nuclear@7	67 init,
nuclear@7	68 shutdown,
nuclear@7	69 set_vidmode,
nuclear@7	70 get_vidmode,
nuclear@7	71 create_window,
nuclear@7	72 close_window,
nuclear@7	73 set_active,
nuclear@7	74 set_title,
nuclear@7	75 redisplay,
nuclear@7	76 swap_buffers,
nuclear@7	77 get_modifiers,
nuclear@7	78 set_event,
nuclear@7	79 process_events,
nuclear@7	80 0
nuclear@7	81 };
nuclear@7	82
nuclear@7	83 #ifndef FREEGLUT
nuclear@7	84 static jmp_buf jbuf;
nuclear@7	85 #endif
nuclear@7	86
nuclear@7	87 static struct window *winlist;
nuclear@7	88
nuclear@7	89
nuclear@7	90 /* this is the only exported function, everything else should be static */
nuclear@7	91 void sgl_register_glut(void)
nuclear@7	92 {
nuclear@7	93 sgl_register_module(&ws);
nuclear@7	94 }
nuclear@7	95
nuclear@7	96 static int init(void)
nuclear@7	97 {
nuclear@7	98 char *argv[] = { "simplygl", 0 };
nuclear@7	99 int argc = 1;
nuclear@7	100
nuclear@7	101 glutInit(&argc, argv);
nuclear@7	102 return 0;
nuclear@7	103 }
nuclear@7	104
nuclear@7	105 static void shutdown(void)
nuclear@7	106 {
nuclear@7	107 struct window *win = winlist;
nuclear@7	108
nuclear@7	109 while(win) {
nuclear@7	110 int id = win->id;
nuclear@7	111 win = win->next;
nuclear@7	112
nuclear@7	113 close_window(id);
nuclear@7	114 }
nuclear@7	115 winlist = 0;
nuclear@7	116 }
nuclear@7	117
nuclear@7	118 static int set_vidmode(int xsz, int ysz)
nuclear@7	119 {
nuclear@7	120 /* TODO */
nuclear@7	121 return 0;
nuclear@7	122 }
nuclear@7	123
nuclear@7	124 static int get_vidmode(int xsz, int ysz)
nuclear@7	125 {
nuclear@7	126 /* TODO */
nuclear@7	127 return 0;
nuclear@7	128 }
nuclear@7	129
nuclear@7	130 static int create_window(int xsz, int ysz, unsigned int flags)
nuclear@7	131 {
nuclear@7	132 struct window *win;
nuclear@7	133 unsigned int glut_flags = GLUT_RGBA;
nuclear@7	134
nuclear@7	135 if(flags & SGL_DOUBLE) {
nuclear@7	136 glut_flags \|= GLUT_DOUBLE;
nuclear@7	137 }
nuclear@7	138 if(flags & SGL_DEPTH) {
nuclear@7	139 glut_flags \|= GLUT_DEPTH;
nuclear@7	140 }
nuclear@7	141 if(flags & SGL_STENCIL) {
nuclear@7	142 glut_flags \|= GLUT_STENCIL;
nuclear@7	143 }
nuclear@7	144 if(flags & SGL_STEREO) {
nuclear@7	145 glut_flags \|= GLUT_STEREO;
nuclear@7	146 }
nuclear@7	147 if(flags & SGL_MULTISAMPLE) {
nuclear@7	148 glut_flags \|= GLUT_MULTISAMPLE;
nuclear@7	149 }
nuclear@7	150
nuclear@7	151 if(!(win = malloc(sizeof *win))) {
nuclear@7	152 return -1;
nuclear@7	153 }
nuclear@7	154
nuclear@7	155 glutInitDisplayMode(glut_flags);
nuclear@7	156 glutInitWindowSize(xsz, ysz);
nuclear@7	157 if((win->id = glutCreateWindow("OpenGL/GLUT")) <= 0) {
nuclear@7	158 free(win);
nuclear@7	159 return -1;
nuclear@7	160 }
nuclear@7	161
nuclear@7	162 win->next = winlist;
nuclear@7	163 winlist = win;
nuclear@7	164 return win->id;
nuclear@7	165 }
nuclear@7	166
nuclear@7	167 static void close_window(int id)
nuclear@7	168 {
nuclear@7	169 struct window dummy, win, prev;
nuclear@7	170
nuclear@7	171 dummy.next = win = winlist;
nuclear@7	172 prev = &dummy;
nuclear@7	173
nuclear@7	174 while(win) {
nuclear@7	175 if(win->id == id) {
nuclear@7	176 prev->next = win->next;
nuclear@7	177 free(win);
nuclear@7	178 break;
nuclear@7	179 }
nuclear@13	180 prev = win;
nuclear@7	181 win = win->next;
nuclear@7	182 }
nuclear@7	183
nuclear@7	184 glutDestroyWindow(id);
nuclear@7	185 }
nuclear@7	186
nuclear@7	187 static int set_active(int id)
nuclear@7	188 {
nuclear@7	189 glutSetWindow(id);
nuclear@7	190 return 0;
nuclear@7	191 }
nuclear@7	192
nuclear@7	193 static int set_title(const char *str)
nuclear@7	194 {
nuclear@7	195 glutSetWindowTitle(str);
nuclear@7	196 glutSetIconTitle(str);
nuclear@7	197 return 0;
nuclear@7	198 }
nuclear@7	199
nuclear@7	200 static void redisplay(void)
nuclear@7	201 {
nuclear@7	202 glutPostRedisplay();
nuclear@7	203 }
nuclear@7	204
nuclear@7	205 static void swap_buffers(void)
nuclear@7	206 {
nuclear@7	207 glutSwapBuffers();
nuclear@7	208 }
nuclear@7	209
nuclear@7	210 static int get_modifiers(void)
nuclear@7	211 {
nuclear@7	212 return glutGetModifiers();
nuclear@7	213 }
nuclear@7	214
nuclear@7	215 static void set_event(int idx, int enable)
nuclear@7	216 {
nuclear@7	217 switch(idx) {
nuclear@7	218 case SGL_DISPLAY:
nuclear@7	219 glutDisplayFunc(enable ? disp_cb : 0);
nuclear@7	220 break;
nuclear@7	221 case SGL_RESHAPE:
nuclear@7	222 glutReshapeFunc(enable ? reshape_cb : 0);
nuclear@7	223 break;
nuclear@7	224 case SGL_KEYBOARD:
nuclear@7	225 glutKeyboardFunc(enable ? keyb_down_cb : 0);
nuclear@7	226 glutKeyboardUpFunc(enable ? keyb_up_cb : 0);
nuclear@7	227 glutSpecialFunc(enable ? special_down_cb : 0);
nuclear@7	228 glutSpecialUpFunc(enable ? special_up_cb : 0);
nuclear@7	229 break;
nuclear@7	230 case SGL_MOUSE:
nuclear@7	231 glutMouseFunc(enable ? mouse_cb : 0);
nuclear@7	232 break;
nuclear@7	233 case SGL_MOTION:
nuclear@7	234 glutMotionFunc(enable ? motion_cb : 0);
nuclear@7	235 break;
nuclear@7	236 case SGL_PASSIVE:
nuclear@7	237 glutPassiveMotionFunc(enable ? passive_cb : 0);
nuclear@7	238 break;
nuclear@7	239 case SGL_IDLE:
nuclear@7	240 glutIdleFunc(enable ? idle_cb : 0);
nuclear@7	241 break;
nuclear@7	242 default:
nuclear@7	243 break;
nuclear@7	244 }
nuclear@7	245 }
nuclear@7	246
nuclear@7	247 static int process_events(void)
nuclear@7	248 {
nuclear@7	249 #ifdef FREEGLUT
nuclear@7	250 glutMainLoopEvent();
nuclear@7	251 #else
nuclear@7	252 if(setjmp(jbuf) == 0) {
nuclear@7	253 glutMainLoop();
nuclear@7	254 }
nuclear@7	255 /* ok ... what happens is any callback that kicks in will set the idle func
nuclear@7	256 * if it's not set, and then the idle func will longjmp right back here...
nuclear@7	257 */
nuclear@7	258 #endif
nuclear@7	259 return 0;
nuclear@7	260 }
nuclear@7	261
nuclear@7	262 static void disp_cb(void)
nuclear@7	263 {
nuclear@7	264 sgl_display_callback_t func = sgl_get_callback(SGL_DISPLAY);
nuclear@7	265 func();
nuclear@7	266
nuclear@7	267 #ifndef FREEGLUT
nuclear@7	268 glutIdleFunc(idle_cb);
nuclear@7	269 #endif
nuclear@7	270 }
nuclear@7	271
nuclear@7	272 static void reshape_cb(int x, int y)
nuclear@7	273 {
nuclear@7	274 sgl_reshape_callback_t func = sgl_get_callback(SGL_RESHAPE);
nuclear@7	275 func(x, y);
nuclear@7	276
nuclear@7	277 #ifndef FREEGLUT
nuclear@7	278 glutIdleFunc(idle_cb);
nuclear@7	279 #endif
nuclear@7	280 }
nuclear@7	281
nuclear@7	282 static void keyb_down_cb(unsigned char c, int x, int y)
nuclear@7	283 {
nuclear@7	284 sgl_keyboard_callback_t func = sgl_get_callback(SGL_KEYBOARD);
nuclear@7	285 func((int)c, 1);
nuclear@7	286
nuclear@7	287 #ifndef FREEGLUT
nuclear@7	288 glutIdleFunc(idle_cb);
nuclear@7	289 #endif
nuclear@7	290 }
nuclear@7	291
nuclear@7	292 static void keyb_up_cb(unsigned char c, int x, int y)
nuclear@7	293 {
nuclear@7	294 sgl_keyboard_callback_t func = sgl_get_callback(SGL_KEYBOARD);
nuclear@7	295 func((int)c, 0);
nuclear@7	296
nuclear@7	297 #ifndef FREEGLUT
nuclear@7	298 glutIdleFunc(idle_cb);
nuclear@7	299 #endif
nuclear@7	300 }
nuclear@7	301
nuclear@7	302 static void special_down_cb(int c, int x, int y)
nuclear@7	303 {
nuclear@7	304 sgl_keyboard_callback_t func = sgl_get_callback(SGL_KEYBOARD);
nuclear@7	305 func(c, 1);
nuclear@7	306
nuclear@7	307 #ifndef FREEGLUT
nuclear@7	308 glutIdleFunc(idle_cb);
nuclear@7	309 #endif
nuclear@7	310 }
nuclear@7	311
nuclear@7	312 static void special_up_cb(int c, int x, int y)
nuclear@7	313 {
nuclear@7	314 sgl_keyboard_callback_t func = sgl_get_callback(SGL_KEYBOARD);
nuclear@7	315 func(c, 0);
nuclear@7	316
nuclear@7	317 #ifndef FREEGLUT
nuclear@7	318 glutIdleFunc(idle_cb);
nuclear@7	319 #endif
nuclear@7	320 }
nuclear@7	321
nuclear@7	322 static void mouse_cb(int bn, int state, int x, int y)
nuclear@7	323 {
nuclear@7	324 sgl_mouse_callback_t func = sgl_get_callback(SGL_MOUSE);
nuclear@7	325 func(0, bn, state, x, y);
nuclear@7	326
nuclear@7	327 #ifndef FREEGLUT
nuclear@7	328 glutIdleFunc(idle_cb);
nuclear@7	329 #endif
nuclear@7	330 }
nuclear@7	331
nuclear@7	332 static void motion_cb(int x, int y)
nuclear@7	333 {
nuclear@7	334 sgl_motion_callback_t func = sgl_get_callback(SGL_MOTION);
nuclear@7	335 func(0, x, y);
nuclear@7	336
nuclear@7	337 #ifndef FREEGLUT
nuclear@7	338 glutIdleFunc(idle_cb);
nuclear@7	339 #endif
nuclear@7	340 }
nuclear@7	341
nuclear@7	342 static void passive_cb(int x, int y)
nuclear@7	343 {
nuclear@7	344 sgl_passive_callback_t func = sgl_get_callback(SGL_PASSIVE);
nuclear@7	345 func(0, x, y);
nuclear@7	346
nuclear@7	347 #ifndef FREEGLUT
nuclear@7	348 glutIdleFunc(idle_cb);
nuclear@7	349 #endif
nuclear@7	350 }
nuclear@7	351
nuclear@7	352 static void idle_cb(void)
nuclear@7	353 {
nuclear@7	354 sgl_idle_callback_t func = sgl_get_callback(SGL_IDLE);
nuclear@7	355 if(func) {
nuclear@7	356 func();
nuclear@7	357 #ifndef FREEGLUT
nuclear@7	358 } else {
nuclear@7	359 /* this was just the longjmp trick so restore the lack of idle func */
nuclear@7	360 glutIdleFunc(0);
nuclear@7	361 #endif
nuclear@7	362 }
nuclear@7	363
nuclear@7	364 #ifndef FREEGLUT
nuclear@7	365 longjmp(jbuf, 0);
nuclear@7	366 #endif
nuclear@7	367 }
nuclear@7	368
nuclear@8	369 #else
nuclear@8	370 int sgl_wsys_glut_silence_the_fucking_empty_file_warnings;
nuclear@7	371 #endif /* USE_WSYS_MODULE_GLUT */