nuclear@4: #include <stdio.h>
nuclear@4: #include <string.h>
nuclear@4: #include "vr.h"
nuclear@4: #include "vr_impl.h"
nuclear@4: 
nuclear@4: 
nuclear@4: static struct vr_module *vrm;
nuclear@4: static float idmat[] = {
nuclear@4: 	1, 0, 0, 0,
nuclear@4: 	0, 1, 0, 0,
nuclear@4: 	0, 0, 1, 0,
nuclear@4: 	0, 0, 0, 1
nuclear@4: };
nuclear@4: static float fbtex_rect[] = {
nuclear@4: 	0, 0, 1, 1
nuclear@4: };
nuclear@4: 
nuclear@4: int vr_init(void)
nuclear@4: {
nuclear@4: 	int i, nmodules;
nuclear@4: 
nuclear@4: 	if(vrm) {
nuclear@4: 		vr_shutdown();
nuclear@4: 	}
nuclear@4: 
nuclear@4: 	vr_init_modules();
nuclear@4: 
nuclear@4: 	nmodules = vr_get_num_modules();
nuclear@4: 	for(i=0; i<nmodules; i++) {
nuclear@4: 		struct vr_module *m = vr_get_module(i);
nuclear@4: 		if(m->init() != -1) {
nuclear@4: 			/* add to the active modules array */
nuclear@4: 			vr_activate_module(i);
nuclear@4: 			if(!vrm) {
nuclear@4: 				vr_use_module(0);
nuclear@4: 			}
nuclear@4: 		}
nuclear@4: 	}
nuclear@4: 
nuclear@4: 	if(!vrm) {
nuclear@4: 		return -1;
nuclear@4: 	}
nuclear@4: 	return 0;
nuclear@4: }
nuclear@4: 
nuclear@4: void vr_shutdown(void)
nuclear@4: {
nuclear@4: 	vr_clear_modules();
nuclear@4: 	vrm = 0;
nuclear@4: 	fbtex_rect[0] = fbtex_rect[1] = 0;
nuclear@4: 	fbtex_rect[2] = fbtex_rect[3] = 1;
nuclear@4: }
nuclear@4: 
nuclear@4: int vr_module_count(void)
nuclear@4: {
nuclear@4: 	return vr_get_num_active_modules();
nuclear@4: }
nuclear@4: 
nuclear@4: const char *vr_module_name(int idx)
nuclear@4: {
nuclear@4: 	struct vr_module *m = vr_get_active_module(idx);
nuclear@4: 	if(!m) {
nuclear@4: 		return 0;
nuclear@4: 	}
nuclear@4: 	return m->name;
nuclear@4: }
nuclear@4: 
nuclear@4: int vr_use_module(int idx)
nuclear@4: {
nuclear@4: 	if(idx >= 0 && idx < vr_get_num_active_modules()) {
nuclear@4: 		vrm = vr_get_active_module(idx);
nuclear@4: 		printf("using vr module: %s\n", vrm->name);
nuclear@4: 		return 0;
nuclear@4: 	}
nuclear@4: 	return -1;
nuclear@4: }
nuclear@4: 
nuclear@4: int vr_use_module_named(const char *name)
nuclear@4: {
nuclear@4: 	int i, count = vr_get_num_active_modules();
nuclear@4: 
nuclear@4: 	for(i=0; i<count; i++) {
nuclear@4: 		struct vr_module *m = vr_get_active_module(i);
nuclear@4: 		if(strcmp(m->name, name) == 0) {
nuclear@4: 			return vr_use_module(i);
nuclear@4: 		}
nuclear@4: 	}
nuclear@4: 	return -1;
nuclear@4: }
nuclear@4: 
nuclear@4: int vr_view_matrix(int eye, float *mat)
nuclear@4: {
nuclear@4: 	if(vrm && vrm->view_matrix) {
nuclear@4: 		vrm->view_matrix(eye, mat);
nuclear@4: 		return 1;
nuclear@4: 	}
nuclear@4: 	memcpy(mat, idmat, sizeof idmat);
nuclear@4: 	return 0;
nuclear@4: }
nuclear@4: 
nuclear@4: int vr_proj_matrix(int eye, float *mat)
nuclear@4: {
nuclear@4: 	if(vrm && vrm->proj_matrix) {
nuclear@4: 		vrm->proj_matrix(eye, mat);
nuclear@4: 		return 1;
nuclear@4: 	}
nuclear@4: 	memcpy(mat, idmat, sizeof idmat);
nuclear@4: 	return 0;
nuclear@4: }
nuclear@4: 
nuclear@4: void vr_present(unsigned int fbtex)
nuclear@4: {
nuclear@4: 	if(vrm && vrm->draw) {
nuclear@4: 		vrm->draw(fbtex, fbtex_rect[0], fbtex_rect[2], fbtex_rect[1], fbtex_rect[3]);
nuclear@4: 	}
nuclear@4: }
nuclear@4: 
nuclear@4: void vr_fbrect(float u, float umax, float v, float vmax)
nuclear@4: {
nuclear@4: 	fbtex_rect[0] = u;
nuclear@4: 	fbtex_rect[1] = v;
nuclear@4: 	fbtex_rect[2] = umax;
nuclear@4: 	fbtex_rect[3] = vmax;
nuclear@4: }