libgoatvr

annotate src/vr_libovr.c @ 30:1a8343ea54ce

find changesets by author, revision, files, or words in the commit message
fixed on windows
author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 11 Apr 2015 04:01:47 +0300
parents ddaa9c764030
children
rev   line source
nuclear@0 1 #ifdef WIN32
nuclear@0 2 #define OVR_OS_WIN32
nuclear@24 3 #elif defined(__APPLE__)
nuclear@9 4 #define OVR_OS_MAC
nuclear@24 5 #else
nuclear@24 6 #define OVR_OS_LINUX
nuclear@9 7 #endif
nuclear@0 8
nuclear@0 9 #include "vr_impl.h"
nuclear@0 10
nuclear@0 11 #ifdef USE_LIBOVR
nuclear@0 12 #include <stdio.h>
nuclear@0 13 #include <stdlib.h>
nuclear@9 14 #include <string.h>
nuclear@0 15 #include <assert.h>
nuclear@30 16 #include "opengl.h"
nuclear@0 17 #include "opt.h"
nuclear@0 18
nuclear@0 19 #include <OVR_CAPI.h>
nuclear@0 20 #include <OVR_CAPI_GL.h>
nuclear@0 21
nuclear@30 22 static PFNGLUSEPROGRAMPROC gl_use_program;
nuclear@0 23
nuclear@0 24 static ovrHmd hmd;
nuclear@0 25 static void *optdb;
nuclear@0 26 static ovrEyeRenderDesc eye_render_desc[2];
nuclear@0 27 static ovrSizei eye_res[2];
nuclear@0 28 static ovrGLTexture eye_tex[2];
nuclear@0 29 static ovrFovPort eye_fov[2];
nuclear@19 30 static ovrPosef pose[2] = {
nuclear@19 31 { {0, 0, 0, 1}, {0, 0, 0} },
nuclear@19 32 { {0, 0, 0, 1}, {0, 0, 0} }
nuclear@19 33 };
nuclear@0 34 static int deferred_init_done;
nuclear@0 35
nuclear@19 36 static int inside_begin_end;
nuclear@19 37
nuclear@0 38 static int init(void)
nuclear@0 39 {
nuclear@0 40 int i, num_hmds;
nuclear@9 41 int use_fake = 0;
nuclear@14 42 ovrTrackingCaps tracking;
nuclear@0 43
nuclear@28 44 if(!ovr_Initialize(0)) {
nuclear@0 45 return -1;
nuclear@0 46 }
nuclear@0 47 printf("initialized LibOVR %s\n", ovr_GetVersionString());
nuclear@0 48
nuclear@0 49 if(!(num_hmds = ovrHmd_Detect())) {
nuclear@9 50 if(getenv("VR_LIBOVR_FAKE")) {
nuclear@9 51 use_fake = 1;
nuclear@9 52 num_hmds = 1;
nuclear@9 53 } else {
nuclear@9 54 ovr_Shutdown();
nuclear@9 55 return -1;
nuclear@9 56 }
nuclear@0 57 }
nuclear@0 58 printf("%d Oculus HMD(s) found\n", num_hmds);
nuclear@0 59
nuclear@0 60 hmd = 0;
nuclear@0 61 for(i=0; i<num_hmds; i++) {
nuclear@9 62 ovrHmd h = use_fake ? ovrHmd_CreateDebug(ovrHmd_DK2) : ovrHmd_Create(i);
nuclear@9 63 if(!h) {
nuclear@0 64 break;
nuclear@0 65 }
nuclear@0 66 printf(" [%d]: %s - %s\n", i, h->Manufacturer, h->ProductName);
nuclear@0 67
nuclear@0 68 if(!hmd) {
nuclear@0 69 hmd = h;
nuclear@0 70 } else {
nuclear@0 71 ovrHmd_Destroy(h);
nuclear@0 72 }
nuclear@0 73 }
nuclear@0 74
nuclear@0 75 if(!hmd) {
nuclear@0 76 fprintf(stderr, "failed to initialize any Oculus HMDs\n");
nuclear@0 77 return -1;
nuclear@0 78 }
nuclear@0 79
nuclear@14 80 tracking = ovrTrackingCap_Orientation | ovrTrackingCap_Position |
nuclear@14 81 ovrTrackingCap_MagYawCorrection;
nuclear@14 82 ovrHmd_ConfigureTracking(hmd, tracking, 0);
nuclear@0 83
nuclear@0 84 eye_fov[0] = hmd->DefaultEyeFov[0];
nuclear@0 85 eye_fov[1] = hmd->DefaultEyeFov[1];
nuclear@0 86
nuclear@0 87 eye_res[0] = ovrHmd_GetFovTextureSize(hmd, ovrEye_Left, eye_fov[0], 1.0);
nuclear@0 88 eye_res[1] = ovrHmd_GetFovTextureSize(hmd, ovrEye_Right, eye_fov[1], 1.0);
nuclear@0 89
nuclear@0 90 /* create the options database */
nuclear@0 91 if((optdb = create_options())) {
nuclear@11 92 set_option_int(optdb, VR_DISPLAY_WIDTH, hmd->Resolution.w);
nuclear@11 93 set_option_int(optdb, VR_DISPLAY_HEIGHT, hmd->Resolution.h);
nuclear@11 94 set_option_int(optdb, VR_LEYE_XRES, eye_res[0].w);
nuclear@11 95 set_option_int(optdb, VR_LEYE_YRES, eye_res[0].h);
nuclear@11 96 set_option_int(optdb, VR_REYE_XRES, eye_res[1].w);
nuclear@11 97 set_option_int(optdb, VR_REYE_YRES, eye_res[1].h);
nuclear@29 98 set_option_int(optdb, VR_RENDER_XRES, eye_res[0].w + eye_res[1].w);
nuclear@29 99 set_option_int(optdb, VR_RENDER_YRES, eye_res[0].h > eye_res[1].h ? eye_res[0].h : eye_res[1].h);
nuclear@16 100 set_option_float(optdb, VR_RENDER_RES_SCALE, 1.0);
nuclear@11 101 set_option_float(optdb, VR_EYE_HEIGHT, ovrHmd_GetFloat(hmd, OVR_KEY_EYE_HEIGHT, OVR_DEFAULT_EYE_HEIGHT));
nuclear@11 102 set_option_float(optdb, VR_IPD, ovrHmd_GetFloat(hmd, OVR_KEY_IPD, OVR_DEFAULT_IPD));
nuclear@11 103 set_option_int(optdb, VR_WIN_XOFFS, hmd->WindowsPos.x);
nuclear@11 104 set_option_int(optdb, VR_WIN_YOFFS, hmd->WindowsPos.y);
nuclear@0 105 }
nuclear@0 106
nuclear@30 107 if(!(gl_use_program = (PFNGLUSEPROGRAMPROC)vrimp_glfunc("glUseProgram"))) {
nuclear@30 108 gl_use_program = (PFNGLUSEPROGRAMPROC)vrimp_glfunc("glUseProgramObjectARB");
nuclear@30 109 }
nuclear@30 110
nuclear@0 111 deferred_init_done = 0;
nuclear@0 112 return 0;
nuclear@0 113 }
nuclear@0 114
nuclear@0 115 static void deferred_init(void)
nuclear@0 116 {
nuclear@0 117 union ovrGLConfig glcfg;
nuclear@0 118 unsigned int dcaps;
nuclear@0 119 void *win = 0;
nuclear@19 120 float leye_offs[3], reye_offs[3];
nuclear@0 121
nuclear@0 122 deferred_init_done = 1;
nuclear@0 123
nuclear@0 124 memset(&glcfg, 0, sizeof glcfg);
nuclear@0 125 glcfg.OGL.Header.API = ovrRenderAPI_OpenGL;
nuclear@21 126 glcfg.OGL.Header.BackBufferSize = hmd->Resolution;
nuclear@0 127 glcfg.OGL.Header.Multisample = 1;
nuclear@0 128 #ifdef WIN32
nuclear@0 129 win = GetActiveWindow();
nuclear@24 130 glcfg.OGL.Window = win;
nuclear@0 131 glcfg.OGL.DC = wglGetCurrentDC();
nuclear@24 132 #else
nuclear@24 133 glcfg.OGL.Disp = glXGetCurrentDisplay();
nuclear@24 134 win = (void*)glXGetCurrentDrawable();
nuclear@24 135
nuclear@24 136 /* on linux the Oculus SDK docs are instructing users to leave the DK2 screen in
nuclear@24 137 * portrait mode. So we'll have to flip width and height
nuclear@24 138 */
nuclear@24 139 glcfg.OGL.Header.BackBufferSize.w = hmd->Resolution.h;
nuclear@24 140 glcfg.OGL.Header.BackBufferSize.h = hmd->Resolution.w;
nuclear@0 141 #endif
nuclear@0 142
nuclear@0 143 if(!(hmd->HmdCaps & ovrHmdCap_ExtendDesktop)) {
nuclear@0 144 ovrHmd_AttachToWindow(hmd, win, 0, 0);
nuclear@0 145 printf("running in \"direct-to-rift\" mode\n");
nuclear@0 146 } else {
nuclear@0 147 printf("running in \"extended desktop\" mode\n");
nuclear@0 148 }
nuclear@0 149 ovrHmd_SetEnabledCaps(hmd, ovrHmdCap_LowPersistence | ovrHmdCap_DynamicPrediction);
nuclear@0 150
nuclear@28 151 dcaps = ovrDistortionCap_TimeWarp | ovrDistortionCap_Overdrive;
nuclear@24 152 #ifdef OVR_OS_LINUX
nuclear@24 153 dcaps |= ovrDistortionCap_LinuxDevFullscreen;
nuclear@24 154 #endif
nuclear@0 155
nuclear@0 156 if(!ovrHmd_ConfigureRendering(hmd, &glcfg.Config, dcaps, eye_fov, eye_render_desc)) {
nuclear@0 157 fprintf(stderr, "failed to configure LibOVR distortion renderer\n");
nuclear@0 158 }
nuclear@0 159
nuclear@19 160 /* set the eye offset options */
nuclear@21 161 leye_offs[0] = eye_render_desc[ovrEye_Left].HmdToEyeViewOffset.x;
nuclear@21 162 leye_offs[1] = eye_render_desc[ovrEye_Left].HmdToEyeViewOffset.y;
nuclear@21 163 leye_offs[2] = eye_render_desc[ovrEye_Left].HmdToEyeViewOffset.z;
nuclear@21 164 reye_offs[0] = eye_render_desc[ovrEye_Right].HmdToEyeViewOffset.x;
nuclear@21 165 reye_offs[1] = eye_render_desc[ovrEye_Right].HmdToEyeViewOffset.y;
nuclear@21 166 reye_offs[2] = eye_render_desc[ovrEye_Right].HmdToEyeViewOffset.z;
nuclear@24 167
nuclear@24 168 /* sanity check ... on linux it seems I'm getting the eye offsets reversed for some reason */
nuclear@24 169 if(leye_offs[0] > reye_offs[0]) {
nuclear@24 170 fprintf(stderr, "BUG %s:%d: eye offset reversed?! fixing but wtf...\n", __FILE__, __LINE__);
nuclear@24 171 set_option_vec(optdb, VR_LEYE_OFFSET, reye_offs);
nuclear@24 172 set_option_vec(optdb, VR_REYE_OFFSET, leye_offs);
nuclear@24 173 } else {
nuclear@24 174 set_option_vec(optdb, VR_LEYE_OFFSET, leye_offs);
nuclear@24 175 set_option_vec(optdb, VR_REYE_OFFSET, reye_offs);
nuclear@24 176 }
nuclear@0 177 }
nuclear@0 178
nuclear@0 179 static void cleanup(void)
nuclear@0 180 {
nuclear@0 181 if(hmd) {
nuclear@0 182 ovrHmd_Destroy(hmd);
nuclear@0 183 ovr_Shutdown();
nuclear@0 184 }
nuclear@5 185 destroy_options(optdb);
nuclear@0 186 }
nuclear@0 187
nuclear@0 188 static int set_option(const char *opt, enum opt_type type, void *valp)
nuclear@0 189 {
nuclear@15 190 float fval;
nuclear@15 191
nuclear@0 192 switch(type) {
nuclear@0 193 case OTYPE_INT:
nuclear@15 194 fval = (float)*(int*)valp;
nuclear@0 195 set_option_int(optdb, opt, *(int*)valp);
nuclear@0 196 break;
nuclear@0 197
nuclear@0 198 case OTYPE_FLOAT:
nuclear@15 199 fval = *(float*)valp;
nuclear@15 200 set_option_float(optdb, opt, fval);
nuclear@0 201 break;
nuclear@24 202
nuclear@24 203 case OTYPE_VEC:
nuclear@24 204 set_option_vec(optdb, opt, valp);
nuclear@24 205 break;
nuclear@0 206 }
nuclear@15 207
nuclear@16 208 if(hmd && strcmp(opt, VR_RENDER_RES_SCALE) == 0) {
nuclear@15 209 eye_res[0] = ovrHmd_GetFovTextureSize(hmd, ovrEye_Left, eye_fov[0], fval);
nuclear@15 210 eye_res[1] = ovrHmd_GetFovTextureSize(hmd, ovrEye_Right, eye_fov[1], fval);
nuclear@15 211
nuclear@15 212 set_option_int(optdb, VR_LEYE_XRES, eye_res[0].w);
nuclear@15 213 set_option_int(optdb, VR_LEYE_YRES, eye_res[0].h);
nuclear@15 214 set_option_int(optdb, VR_REYE_XRES, eye_res[1].w);
nuclear@15 215 set_option_int(optdb, VR_REYE_YRES, eye_res[1].h);
nuclear@15 216 }
nuclear@15 217
nuclear@0 218 return 0;
nuclear@0 219 }
nuclear@0 220
nuclear@0 221 static int get_option(const char *opt, enum opt_type type, void *valp)
nuclear@0 222 {
nuclear@0 223 switch(type) {
nuclear@0 224 case OTYPE_INT:
nuclear@0 225 return get_option_int(optdb, opt, valp);
nuclear@0 226 case OTYPE_FLOAT:
nuclear@0 227 return get_option_float(optdb, opt, valp);
nuclear@24 228 case OTYPE_VEC:
nuclear@24 229 return get_option_vec(optdb, opt, valp);
nuclear@0 230 }
nuclear@0 231 return -1;
nuclear@0 232 }
nuclear@0 233
nuclear@7 234 static void translation(int eye, float *vec)
nuclear@0 235 {
nuclear@0 236 if(!hmd) {
nuclear@0 237 vec[0] = vec[1] = vec[2] = 0;
nuclear@9 238 return;
nuclear@0 239 }
nuclear@0 240
nuclear@19 241 /* if we're inside the begin-end block we can get a fresh pose, otherwise we'll just
nuclear@19 242 * reuse the one we got last frame.
nuclear@19 243 */
nuclear@19 244 if(inside_begin_end) {
nuclear@21 245 pose[eye] = ovrHmd_GetHmdPosePerEye(hmd, eye == VR_EYE_LEFT ? ovrEye_Left : ovrEye_Right);
nuclear@19 246 }
nuclear@19 247
nuclear@19 248 vec[0] = pose[eye].Position.x;
nuclear@19 249 vec[1] = pose[eye].Position.y;
nuclear@19 250 vec[2] = pose[eye].Position.z;
nuclear@0 251 }
nuclear@0 252
nuclear@7 253 static void rotation(int eye, float *quat)
nuclear@0 254 {
nuclear@0 255 if(!hmd) {
nuclear@0 256 quat[0] = quat[1] = quat[2] = 0.0f;
nuclear@0 257 quat[3] = 1.0f;
nuclear@9 258 return;
nuclear@0 259 }
nuclear@0 260
nuclear@19 261 /* same as above (translation) */
nuclear@19 262 if(inside_begin_end) {
nuclear@21 263 pose[eye] = ovrHmd_GetHmdPosePerEye(hmd, eye == VR_EYE_LEFT ? ovrEye_Left : ovrEye_Right);
nuclear@19 264 }
nuclear@19 265
nuclear@0 266 quat[0] = pose[eye].Orientation.x;
nuclear@0 267 quat[1] = pose[eye].Orientation.y;
nuclear@0 268 quat[2] = pose[eye].Orientation.z;
nuclear@0 269 quat[3] = pose[eye].Orientation.w;
nuclear@0 270 }
nuclear@0 271
nuclear@0 272 static const float idmat[] = {1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1};
nuclear@0 273
nuclear@0 274 static void proj_matrix(int eye, float znear, float zfar, float *mat)
nuclear@0 275 {
nuclear@0 276 int i, j;
nuclear@0 277 ovrMatrix4f vmat;
nuclear@0 278
nuclear@0 279 if(!hmd) {
nuclear@0 280 memcpy(mat, idmat, sizeof idmat);
nuclear@0 281 return;
nuclear@0 282 }
nuclear@0 283
nuclear@0 284 vmat = ovrMatrix4f_Projection(eye_render_desc[eye].Fov, znear, zfar, 1);
nuclear@0 285
nuclear@0 286 for(i=0; i<4; i++) {
nuclear@0 287 for(j=0; j<4; j++) {
nuclear@0 288 *mat++ = vmat.M[j][i];
nuclear@0 289 }
nuclear@0 290 }
nuclear@0 291 }
nuclear@0 292
nuclear@0 293 static void begin(int eye)
nuclear@0 294 {
nuclear@0 295 if(!hmd) return;
nuclear@0 296
nuclear@0 297 if(!deferred_init_done) {
nuclear@0 298 deferred_init();
nuclear@0 299 }
nuclear@0 300
nuclear@19 301 if(!inside_begin_end) {
nuclear@0 302 ovrHmd_BeginFrame(hmd, 0);
nuclear@19 303 inside_begin_end = 1;
nuclear@0 304 }
nuclear@0 305 }
nuclear@0 306
nuclear@0 307 static int present(void)
nuclear@0 308 {
nuclear@30 309 int cur_prog = 0;
nuclear@24 310
nuclear@0 311 if(!hmd) return 0;
nuclear@0 312
nuclear@30 313 if(gl_use_program) {
nuclear@30 314 glGetIntegerv(GL_CURRENT_PROGRAM, &cur_prog);
nuclear@30 315 }
nuclear@24 316
nuclear@0 317 ovrHmd_EndFrame(hmd, pose, &eye_tex[0].Texture);
nuclear@19 318 inside_begin_end = 0;
nuclear@0 319
nuclear@30 320 if(gl_use_program) {
nuclear@30 321 gl_use_program(cur_prog);
nuclear@24 322 }
nuclear@24 323
nuclear@0 324 return 1;
nuclear@0 325 }
nuclear@0 326
nuclear@0 327 static void set_eye_texture(int eye, unsigned int tex, float umin, float vmin, float umax, float vmax)
nuclear@0 328 {
nuclear@0 329 ovrSizei texsz;
nuclear@0 330 ovrRecti rect;
nuclear@0 331
nuclear@0 332 glBindTexture(GL_TEXTURE_2D, tex);
nuclear@0 333 glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &texsz.w);
nuclear@0 334 glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &texsz.h);
nuclear@0 335
nuclear@0 336 rect.Pos.x = (int)(umin * texsz.w);
nuclear@21 337 rect.Pos.y = (int)(vmin * texsz.h);
nuclear@0 338 rect.Size.w = (int)((umax - umin) * texsz.w);
nuclear@0 339 rect.Size.h = (int)((vmax - vmin) * texsz.h);
nuclear@0 340
nuclear@0 341 eye_tex[eye].OGL.Header.API = ovrRenderAPI_OpenGL;
nuclear@0 342 eye_tex[eye].OGL.Header.TextureSize = texsz;
nuclear@0 343 eye_tex[eye].OGL.Header.RenderViewport = rect;
nuclear@0 344 eye_tex[eye].OGL.TexId = tex;
nuclear@0 345 }
nuclear@0 346
nuclear@0 347 static void recenter(void)
nuclear@0 348 {
nuclear@0 349 if(hmd) {
nuclear@0 350 ovrHmd_RecenterPose(hmd);
nuclear@0 351 }
nuclear@0 352 }
nuclear@0 353
nuclear@0 354 struct vr_module *vr_module_libovr(void)
nuclear@0 355 {
nuclear@0 356 static struct vr_module m;
nuclear@0 357
nuclear@0 358 if(!m.init) {
nuclear@0 359 m.name = "libovr";
nuclear@0 360 m.init = init;
nuclear@0 361 m.cleanup = cleanup;
nuclear@0 362 m.set_option = set_option;
nuclear@0 363 m.get_option = get_option;
nuclear@0 364 m.translation = translation;
nuclear@0 365 m.rotation = rotation;
nuclear@0 366 m.proj_matrix = proj_matrix;
nuclear@0 367 m.begin = begin;
nuclear@0 368 m.present = present;
nuclear@0 369 m.set_eye_texture = set_eye_texture;
nuclear@0 370 m.recenter = recenter;
nuclear@0 371 }
nuclear@0 372 return &m;
nuclear@0 373 }
nuclear@0 374
nuclear@0 375 #else /* no libovr */
nuclear@0 376
nuclear@0 377 static int init(void)
nuclear@0 378 {
nuclear@0 379 return -1;
nuclear@0 380 }
nuclear@0 381
nuclear@0 382 struct vr_module *vr_module_libovr(void)
nuclear@0 383 {
nuclear@0 384 static struct vr_module m;
nuclear@0 385
nuclear@0 386 if(!m.init) {
nuclear@0 387 m.name = "libovr";
nuclear@0 388 m.init = init;
nuclear@0 389 }
nuclear@0 390 return &m;
nuclear@0 391 }
nuclear@0 392
nuclear@0 393 #endif /* USE_LIBOVR */