1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/vr.c	Fri Aug 29 03:45:25 2014 +0300
     1.3 @@ -0,0 +1,260 @@
     1.4 +#include <stdio.h>
     1.5 +#include <string.h>
     1.6 +#include "vr.h"
     1.7 +#include "vr_impl.h"
     1.8 +#include "mathutil.h"
     1.9 +
    1.10 +
    1.11 +static void swap_buffers(void);
    1.12 +
    1.13 +
    1.14 +static struct vr_module *vrm;
    1.15 +static float idmat[] = {
    1.16 +	1, 0, 0, 0,
    1.17 +	0, 1, 0, 0,
    1.18 +	0, 0, 1, 0,
    1.19 +	0, 0, 0, 1
    1.20 +};
    1.21 +static float fbtex_rect[] = {
    1.22 +	0, 0, 1, 1
    1.23 +};
    1.24 +
    1.25 +int vr_init(void)
    1.26 +{
    1.27 +	int i, nmodules;
    1.28 +
    1.29 +	if(vrm) {
    1.30 +		vr_shutdown();
    1.31 +	}
    1.32 +
    1.33 +	vr_init_modules();
    1.34 +
    1.35 +	nmodules = vr_get_num_modules();
    1.36 +	for(i=0; i<nmodules; i++) {
    1.37 +		struct vr_module *m = vr_get_module(i);
    1.38 +		if(m->init() != -1) {
    1.39 +			/* add to the active modules array */
    1.40 +			vr_activate_module(i);
    1.41 +			if(!vrm) {
    1.42 +				vr_use_module(0);
    1.43 +			}
    1.44 +		}
    1.45 +	}
    1.46 +
    1.47 +	if(!vrm) {
    1.48 +		return -1;
    1.49 +	}
    1.50 +	return 0;
    1.51 +}
    1.52 +
    1.53 +void vr_shutdown(void)
    1.54 +{
    1.55 +	vr_clear_modules();
    1.56 +	vrm = 0;
    1.57 +	fbtex_rect[0] = fbtex_rect[1] = 0;
    1.58 +	fbtex_rect[2] = fbtex_rect[3] = 1;
    1.59 +}
    1.60 +
    1.61 +int vr_module_count(void)
    1.62 +{
    1.63 +	return vr_get_num_active_modules();
    1.64 +}
    1.65 +
    1.66 +const char *vr_module_name(int idx)
    1.67 +{
    1.68 +	struct vr_module *m = vr_get_active_module(idx);
    1.69 +	if(!m) {
    1.70 +		return 0;
    1.71 +	}
    1.72 +	return m->name;
    1.73 +}
    1.74 +
    1.75 +int vr_use_module(int idx)
    1.76 +{
    1.77 +	if(idx >= 0 && idx < vr_get_num_active_modules()) {
    1.78 +		struct vr_module *m = vr_get_active_module(idx);
    1.79 +		if(m != vrm) {
    1.80 +			vrm = m;
    1.81 +			printf("using vr module: %s\n", vrm->name);
    1.82 +		}
    1.83 +		return 0;
    1.84 +	}
    1.85 +	return -1;
    1.86 +}
    1.87 +
    1.88 +int vr_use_module_named(const char *name)
    1.89 +{
    1.90 +	int i, count = vr_get_num_active_modules();
    1.91 +
    1.92 +	for(i=0; i<count; i++) {
    1.93 +		struct vr_module *m = vr_get_active_module(i);
    1.94 +		if(strcmp(m->name, name) == 0) {
    1.95 +			return vr_use_module(i);
    1.96 +		}
    1.97 +	}
    1.98 +	return -1;
    1.99 +}
   1.100 +
   1.101 +void vr_set_opti(const char *optname, int val)
   1.102 +{
   1.103 +	if(vrm && vrm->set_option) {
   1.104 +		vrm->set_option(optname, OTYPE_INT, &val);
   1.105 +	}
   1.106 +}
   1.107 +
   1.108 +void vr_set_optf(const char *optname, float val)
   1.109 +{
   1.110 +	if(vrm && vrm->set_option) {
   1.111 +		vrm->set_option(optname, OTYPE_FLOAT, &val);
   1.112 +	}
   1.113 +}
   1.114 +
   1.115 +int vr_get_opti(const char *optname)
   1.116 +{
   1.117 +	int res = 0;
   1.118 +
   1.119 +	if(vrm && vrm->get_option) {
   1.120 +		vrm->get_option(optname, OTYPE_INT, &res);
   1.121 +	}
   1.122 +	return res;
   1.123 +}
   1.124 +
   1.125 +float vr_get_optf(const char *optname)
   1.126 +{
   1.127 +	float res = 0.0f;
   1.128 +
   1.129 +	if(vrm && vrm->get_option) {
   1.130 +		vrm->get_option(optname, OTYPE_FLOAT, &res);
   1.131 +	}
   1.132 +	return res;
   1.133 +}
   1.134 +
   1.135 +
   1.136 +int vr_view_translation(int eye, float *vec)
   1.137 +{
   1.138 +	if(vrm && vrm->translation) {
   1.139 +		vrm->translation(eye, vec);
   1.140 +		return 1;
   1.141 +	}
   1.142 +	vec[0] = vec[1] = vec[2] = 0.0f;
   1.143 +	return 0;
   1.144 +}
   1.145 +
   1.146 +int vr_view_rotation(int eye, float *quat)
   1.147 +{
   1.148 +	if(vrm && vrm->rotation) {
   1.149 +		vrm->rotation(eye, quat);
   1.150 +		return 1;
   1.151 +	}
   1.152 +	quat[0] = quat[1] = quat[2] = 0.0f;
   1.153 +	quat[3] = 1.0f;
   1.154 +	return 0;
   1.155 +}
   1.156 +
   1.157 +int vr_view_matrix(int eye, float *mat)
   1.158 +{
   1.159 +	int have_trans, have_rot;
   1.160 +	float offs[3], quat[4];
   1.161 +	float rmat[16], tmat[16];
   1.162 +
   1.163 +	if(vrm && vrm->view_matrix) {
   1.164 +		vrm->view_matrix(eye, mat);
   1.165 +		return 1;
   1.166 +	}
   1.167 +
   1.168 +	have_trans = vr_view_translation(eye, offs);
   1.169 +	have_rot = vr_view_rotation(eye, quat);
   1.170 +
   1.171 +	if(!have_trans && !have_rot) {
   1.172 +		return 0;
   1.173 +	}
   1.174 +
   1.175 +	offs[0] = -offs[0];
   1.176 +	offs[1] = -offs[1];
   1.177 +	offs[2] = -offs[2];
   1.178 +
   1.179 +	translation_matrix(offs, tmat);
   1.180 +	rotation_matrix(quat, rmat);
   1.181 +	mult_matrix(mat, tmat, rmat);
   1.182 +	return 1;
   1.183 +}
   1.184 +
   1.185 +int vr_proj_matrix(int eye, float znear, float zfar, float *mat)
   1.186 +{
   1.187 +	if(vrm && vrm->proj_matrix) {
   1.188 +		vrm->proj_matrix(eye, znear, zfar, mat);
   1.189 +		return 1;
   1.190 +	}
   1.191 +	memcpy(mat, idmat, sizeof idmat);
   1.192 +	return 0;
   1.193 +}
   1.194 +
   1.195 +void vr_begin(int eye)
   1.196 +{
   1.197 +	if(vrm && vrm->begin) {
   1.198 +		vrm->begin(eye);
   1.199 +	}
   1.200 +}
   1.201 +
   1.202 +void vr_end(void)
   1.203 +{
   1.204 +	if(vrm && vrm->end) {
   1.205 +		vrm->end();
   1.206 +	}
   1.207 +}
   1.208 +
   1.209 +int vr_swap_buffers(void)
   1.210 +{
   1.211 +	int res = 0;
   1.212 +
   1.213 +	if(vrm && vrm->present) {
   1.214 +		res = vrm->present();
   1.215 +	}
   1.216 +
   1.217 +	if(!res) {
   1.218 +		swap_buffers();
   1.219 +	}
   1.220 +	return 0;
   1.221 +}
   1.222 +
   1.223 +void vr_output_texture(unsigned int tex, float umin, float vmin, float umax, float vmax)
   1.224 +{
   1.225 +	float halfu = (umax + umin) * 0.5f;
   1.226 +
   1.227 +	vr_output_texture_eye(VR_EYE_LEFT, tex, umin, vmin, halfu, vmax);
   1.228 +	vr_output_texture_eye(VR_EYE_RIGHT, tex, halfu, vmin, umax, vmax);
   1.229 +}
   1.230 +
   1.231 +void vr_output_texture_eye(int eye, unsigned int tex, float umin, float vmin, float umax, float vmax)
   1.232 +{
   1.233 +	if(vrm && vrm->set_eye_texture) {
   1.234 +		vrm->set_eye_texture(eye, tex, umin, vmin, umax, vmax);
   1.235 +	}
   1.236 +}
   1.237 +
   1.238 +void vr_recenter(void)
   1.239 +{
   1.240 +	if(vrm && vrm->recenter) {
   1.241 +		vrm->recenter();
   1.242 +	}
   1.243 +}
   1.244 +
   1.245 +
   1.246 +#ifdef __unix__
   1.247 +#include <GL/glx.h>
   1.248 +
   1.249 +static void swap_buffers(void)
   1.250 +{
   1.251 +	glXSwapBuffers(glXGetCurrentDisplay(), glXGetCurrentDrawable());
   1.252 +}
   1.253 +
   1.254 +#endif
   1.255 +
   1.256 +#ifdef WIN32
   1.257 +#include <windows.h>
   1.258 +
   1.259 +static void swap_buffers(void)
   1.260 +{
   1.261 +	SwapBuffers(wglGetCurrentDC());
   1.262 +}
   1.263 +#endif