sgl: src/wsys_glut.c annotate

sgl

annotate src/wsys_glut.c @ 7:edbfc96fe80d

glut wsys thingy and stuff...

author	John Tsiombikas <nuclear@siggraph.org>
date	Sat, 14 May 2011 08:26:10 +0300
parents
children	0b07dd867b2f

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