nuclear@7: /* SimplyGL window system module for GLUT */
nuclear@7: /* link-with: -lglut */
nuclear@7: 
nuclear@7: #include "config.h"
nuclear@7: 
nuclear@7: #ifdef USE_WSYS_MODULE_GLUT
nuclear@7: 
nuclear@7: #include <setjmp.h>
nuclear@7: #ifndef __APPLE__
nuclear@7: #include <GL/glut.h>
nuclear@7: #undef FREEGLUT
nuclear@7: #ifdef FREEGLUT
nuclear@7: #include <GL/freeglut_ext.h>
nuclear@7: #endif	/* freeglut */
nuclear@7: 
nuclear@7: #else	/* apple */
nuclear@7: #include <GLUT/glut.h>
nuclear@7: #endif
nuclear@7: 
nuclear@7: #include "sgl.h"
nuclear@7: #include "wsys.h"
nuclear@7: 
nuclear@7: struct window {
nuclear@7: 	int id;
nuclear@7: 	struct window *next;
nuclear@7: };
nuclear@7: 
nuclear@7: static int init(void);
nuclear@7: static void shutdown(void);
nuclear@7: 
nuclear@7: /* video mode switching */
nuclear@7: static int set_vidmode(int xsz, int ysz);
nuclear@7: static int get_vidmode(int *xsz, int *ysz);
nuclear@7: 
nuclear@7: /* create/destroy windows */
nuclear@7: static int create_window(int xsz, int ysz, unsigned int flags);
nuclear@7: static void close_window(int id);
nuclear@7: 
nuclear@7: /* window management */
nuclear@7: static int set_active(int id);
nuclear@7: static int set_title(const char *str);
nuclear@7: static void redisplay(void);
nuclear@7: static void swap_buffers(void);
nuclear@7: 
nuclear@7: static int get_modifiers(void);
nuclear@7: 
nuclear@7: /* event handling and friends */
nuclear@7: static void set_event(int idx, int enable);
nuclear@7: static int process_events(void);
nuclear@7: 
nuclear@7: /* callbacks */
nuclear@7: static void disp_cb(void);
nuclear@7: static void reshape_cb(int x, int y);
nuclear@7: static void keyb_down_cb(unsigned char c, int x, int y);
nuclear@7: static void keyb_up_cb(unsigned char c, int x, int y);
nuclear@7: static void special_down_cb(int c, int x, int y);
nuclear@7: static void special_up_cb(int c, int x, int y);
nuclear@7: static void mouse_cb(int bn, int state, int x, int y);
nuclear@7: static void motion_cb(int x, int y);
nuclear@7: static void passive_cb(int x, int y);
nuclear@7: static void idle_cb(void);
nuclear@7: 
nuclear@7: 
nuclear@7: static struct wsys_module ws = {
nuclear@7: 	"glut", 1,
nuclear@7: 	init,
nuclear@7: 	shutdown,
nuclear@7: 	set_vidmode,
nuclear@7: 	get_vidmode,
nuclear@7: 	create_window,
nuclear@7: 	close_window,
nuclear@7: 	set_active,
nuclear@7: 	set_title,
nuclear@7: 	redisplay,
nuclear@7: 	swap_buffers,
nuclear@7: 	get_modifiers,
nuclear@7: 	set_event,
nuclear@7: 	process_events,
nuclear@7: 	0
nuclear@7: };
nuclear@7: 
nuclear@7: #ifndef FREEGLUT
nuclear@7: static jmp_buf jbuf;
nuclear@7: #endif
nuclear@7: 
nuclear@7: static struct window *winlist;
nuclear@7: 
nuclear@7: 
nuclear@7: /* this is the only exported function, everything else should be static */
nuclear@7: void sgl_register_glut(void)
nuclear@7: {
nuclear@7: 	sgl_register_module(&ws);
nuclear@7: }
nuclear@7: 
nuclear@7: static int init(void)
nuclear@7: {
nuclear@7: 	char *argv[] = { "simplygl", 0 };
nuclear@7: 	int argc = 1;
nuclear@7: 
nuclear@7: 	glutInit(&argc, argv);
nuclear@7: 	return 0;
nuclear@7: }
nuclear@7: 
nuclear@7: static void shutdown(void)
nuclear@7: {
nuclear@7: 	struct window *win = winlist;
nuclear@7: 
nuclear@7: 	while(win) {
nuclear@7: 		int id = win->id;
nuclear@7: 		win = win->next;
nuclear@7: 
nuclear@7: 		close_window(id);
nuclear@7: 	}
nuclear@7: 	winlist = 0;
nuclear@7: }
nuclear@7: 
nuclear@7: static int set_vidmode(int xsz, int ysz)
nuclear@7: {
nuclear@7: 	/* TODO */
nuclear@7: 	return 0;
nuclear@7: }
nuclear@7: 
nuclear@7: static int get_vidmode(int *xsz, int *ysz)
nuclear@7: {
nuclear@7: 	/* TODO */
nuclear@7: 	return 0;
nuclear@7: }
nuclear@7: 
nuclear@7: static int create_window(int xsz, int ysz, unsigned int flags)
nuclear@7: {
nuclear@7: 	struct window *win;
nuclear@7: 	unsigned int glut_flags = GLUT_RGBA;
nuclear@7: 
nuclear@7: 	if(flags & SGL_DOUBLE) {
nuclear@7: 		glut_flags |= GLUT_DOUBLE;
nuclear@7: 	}
nuclear@7: 	if(flags & SGL_DEPTH) {
nuclear@7: 		glut_flags |= GLUT_DEPTH;
nuclear@7: 	}
nuclear@7: 	if(flags & SGL_STENCIL) {
nuclear@7: 		glut_flags |= GLUT_STENCIL;
nuclear@7: 	}
nuclear@7: 	if(flags & SGL_STEREO) {
nuclear@7: 		glut_flags |= GLUT_STEREO;
nuclear@7: 	}
nuclear@7: 	if(flags & SGL_MULTISAMPLE) {
nuclear@7: 		glut_flags |= GLUT_MULTISAMPLE;
nuclear@7: 	}
nuclear@7: 
nuclear@7: 	if(!(win = malloc(sizeof *win))) {
nuclear@7: 		return -1;
nuclear@7: 	}
nuclear@7: 
nuclear@7: 	glutInitDisplayMode(glut_flags);
nuclear@7: 	glutInitWindowSize(xsz, ysz);
nuclear@7: 	if((win->id = glutCreateWindow("OpenGL/GLUT")) <= 0) {
nuclear@7: 		free(win);
nuclear@7: 		return -1;
nuclear@7: 	}
nuclear@7: 
nuclear@7: 	win->next = winlist;
nuclear@7: 	winlist = win;
nuclear@7: 	return win->id;
nuclear@7: }
nuclear@7: 
nuclear@7: static void close_window(int id)
nuclear@7: {
nuclear@7: 	struct window dummy, *win, *prev;
nuclear@7: 
nuclear@7: 	dummy.next = win = winlist;
nuclear@7: 	prev = &dummy;
nuclear@7: 
nuclear@7: 	while(win) {
nuclear@7: 		if(win->id == id) {
nuclear@7: 			prev->next = win->next;
nuclear@7: 			free(win);
nuclear@7: 			break;
nuclear@7: 		}
nuclear@7: 		win = win->next;
nuclear@7: 	}
nuclear@7: 
nuclear@7: 	glutDestroyWindow(id);
nuclear@7: }
nuclear@7: 
nuclear@7: static int set_active(int id)
nuclear@7: {
nuclear@7: 	glutSetWindow(id);
nuclear@7: 	return 0;
nuclear@7: }
nuclear@7: 
nuclear@7: static int set_title(const char *str)
nuclear@7: {
nuclear@7: 	glutSetWindowTitle(str);
nuclear@7: 	glutSetIconTitle(str);
nuclear@7: 	return 0;
nuclear@7: }
nuclear@7: 
nuclear@7: static void redisplay(void)
nuclear@7: {
nuclear@7: 	glutPostRedisplay();
nuclear@7: }
nuclear@7: 
nuclear@7: static void swap_buffers(void)
nuclear@7: {
nuclear@7: 	glutSwapBuffers();
nuclear@7: }
nuclear@7: 
nuclear@7: static int get_modifiers(void)
nuclear@7: {
nuclear@7: 	return glutGetModifiers();
nuclear@7: }
nuclear@7: 
nuclear@7: static void set_event(int idx, int enable)
nuclear@7: {
nuclear@7: 	switch(idx) {
nuclear@7: 	case SGL_DISPLAY:
nuclear@7: 		glutDisplayFunc(enable ? disp_cb : 0);
nuclear@7: 		break;
nuclear@7: 	case SGL_RESHAPE:
nuclear@7: 		glutReshapeFunc(enable ? reshape_cb : 0);
nuclear@7: 		break;
nuclear@7: 	case SGL_KEYBOARD:
nuclear@7: 		glutKeyboardFunc(enable ? keyb_down_cb : 0);
nuclear@7: 		glutKeyboardUpFunc(enable ? keyb_up_cb : 0);
nuclear@7: 		glutSpecialFunc(enable ? special_down_cb : 0);
nuclear@7: 		glutSpecialUpFunc(enable ? special_up_cb : 0);
nuclear@7: 		break;
nuclear@7: 	case SGL_MOUSE:
nuclear@7: 		glutMouseFunc(enable ? mouse_cb : 0);
nuclear@7: 		break;
nuclear@7: 	case SGL_MOTION:
nuclear@7: 		glutMotionFunc(enable ? motion_cb : 0);
nuclear@7: 		break;
nuclear@7: 	case SGL_PASSIVE:
nuclear@7: 		glutPassiveMotionFunc(enable ? passive_cb : 0);
nuclear@7: 		break;
nuclear@7: 	case SGL_IDLE:
nuclear@7: 		glutIdleFunc(enable ? idle_cb : 0);
nuclear@7: 		break;
nuclear@7: 	default:
nuclear@7: 		break;
nuclear@7: 	}
nuclear@7: }
nuclear@7: 
nuclear@7: static int process_events(void)
nuclear@7: {
nuclear@7: #ifdef FREEGLUT
nuclear@7: 	glutMainLoopEvent();
nuclear@7: #else
nuclear@7: 	if(setjmp(jbuf) == 0) {
nuclear@7: 		glutMainLoop();
nuclear@7: 	}
nuclear@7: 	/* ok ... what happens is any callback that kicks in will set the idle func
nuclear@7: 	 * if it's not set,  and then the idle func will longjmp right back here...
nuclear@7: 	 */
nuclear@7: #endif
nuclear@7: 	return 0;
nuclear@7: }
nuclear@7: 
nuclear@7: static void disp_cb(void)
nuclear@7: {
nuclear@7: 	sgl_display_callback_t func = sgl_get_callback(SGL_DISPLAY);
nuclear@7: 	func();
nuclear@7: 
nuclear@7: #ifndef FREEGLUT
nuclear@7: 	glutIdleFunc(idle_cb);
nuclear@7: #endif
nuclear@7: }
nuclear@7: 
nuclear@7: static void reshape_cb(int x, int y)
nuclear@7: {
nuclear@7: 	sgl_reshape_callback_t func = sgl_get_callback(SGL_RESHAPE);
nuclear@7: 	func(x, y);
nuclear@7: 
nuclear@7: #ifndef FREEGLUT
nuclear@7: 	glutIdleFunc(idle_cb);
nuclear@7: #endif
nuclear@7: }
nuclear@7: 
nuclear@7: static void keyb_down_cb(unsigned char c, int x, int y)
nuclear@7: {
nuclear@7: 	sgl_keyboard_callback_t func = sgl_get_callback(SGL_KEYBOARD);
nuclear@7: 	func((int)c, 1);
nuclear@7: 
nuclear@7: #ifndef FREEGLUT
nuclear@7: 	glutIdleFunc(idle_cb);
nuclear@7: #endif
nuclear@7: }
nuclear@7: 
nuclear@7: static void keyb_up_cb(unsigned char c, int x, int y)
nuclear@7: {
nuclear@7: 	sgl_keyboard_callback_t func = sgl_get_callback(SGL_KEYBOARD);
nuclear@7: 	func((int)c, 0);
nuclear@7: 
nuclear@7: #ifndef FREEGLUT
nuclear@7: 	glutIdleFunc(idle_cb);
nuclear@7: #endif
nuclear@7: }
nuclear@7: 
nuclear@7: static void special_down_cb(int c, int x, int y)
nuclear@7: {
nuclear@7: 	sgl_keyboard_callback_t func = sgl_get_callback(SGL_KEYBOARD);
nuclear@7: 	func(c, 1);
nuclear@7: 
nuclear@7: #ifndef FREEGLUT
nuclear@7: 	glutIdleFunc(idle_cb);
nuclear@7: #endif
nuclear@7: }
nuclear@7: 
nuclear@7: static void special_up_cb(int c, int x, int y)
nuclear@7: {
nuclear@7: 	sgl_keyboard_callback_t func = sgl_get_callback(SGL_KEYBOARD);
nuclear@7: 	func(c, 0);
nuclear@7: 
nuclear@7: #ifndef FREEGLUT
nuclear@7: 	glutIdleFunc(idle_cb);
nuclear@7: #endif
nuclear@7: }
nuclear@7: 
nuclear@7: static void mouse_cb(int bn, int state, int x, int y)
nuclear@7: {
nuclear@7: 	sgl_mouse_callback_t func = sgl_get_callback(SGL_MOUSE);
nuclear@7: 	func(0, bn, state, x, y);
nuclear@7: 
nuclear@7: #ifndef FREEGLUT
nuclear@7: 	glutIdleFunc(idle_cb);
nuclear@7: #endif
nuclear@7: }
nuclear@7: 
nuclear@7: static void motion_cb(int x, int y)
nuclear@7: {
nuclear@7: 	sgl_motion_callback_t func = sgl_get_callback(SGL_MOTION);
nuclear@7: 	func(0, x, y);
nuclear@7: 
nuclear@7: #ifndef FREEGLUT
nuclear@7: 	glutIdleFunc(idle_cb);
nuclear@7: #endif
nuclear@7: }
nuclear@7: 
nuclear@7: static void passive_cb(int x, int y)
nuclear@7: {
nuclear@7: 	sgl_passive_callback_t func = sgl_get_callback(SGL_PASSIVE);
nuclear@7: 	func(0, x, y);
nuclear@7: 
nuclear@7: #ifndef FREEGLUT
nuclear@7: 	glutIdleFunc(idle_cb);
nuclear@7: #endif
nuclear@7: }
nuclear@7: 
nuclear@7: static void idle_cb(void)
nuclear@7: {
nuclear@7: 	sgl_idle_callback_t func = sgl_get_callback(SGL_IDLE);
nuclear@7: 	if(func) {
nuclear@7: 		func();
nuclear@7: #ifndef FREEGLUT
nuclear@7: 	} else {
nuclear@7: 		/* this was just the longjmp trick so restore the lack of idle func */
nuclear@7: 		glutIdleFunc(0);
nuclear@7: #endif
nuclear@7: 	}
nuclear@7: 
nuclear@7: #ifndef FREEGLUT
nuclear@7: 	longjmp(jbuf, 0);
nuclear@7: #endif
nuclear@7: }
nuclear@7: 
nuclear@7: #endif	/* USE_WSYS_MODULE_GLUT */