libgoatvr

annotate src/vr_libovr.c @ 16:b2d902fff68d

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renamed VR_EYE_RES_SCALE to VR_RENDER_RES_SCALE added convenience options: VR_RENDER_XRES & VR_RENDER_YRES, which are derived from VR_LEYE_XRES, VR_REYE_XRES, etc.
author John Tsiombikas <nuclear@member.fsf.org>
date Thu, 25 Sep 2014 09:06:57 +0300
parents 27fcd4c2969d
children 437fe32ac633
rev   line source
nuclear@0 1 #ifdef WIN32
nuclear@0 2 #define OVR_OS_WIN32
nuclear@0 3 #endif
nuclear@9 4 #ifdef __APPLE__
nuclear@9 5 #define OVR_OS_MAC
nuclear@9 6 #endif
nuclear@0 7
nuclear@0 8 #include "vr_impl.h"
nuclear@0 9
nuclear@0 10 #ifdef USE_LIBOVR
nuclear@0 11 #include <stdio.h>
nuclear@0 12 #include <stdlib.h>
nuclear@9 13 #include <string.h>
nuclear@0 14 #include <assert.h>
nuclear@0 15 #include "opt.h"
nuclear@0 16
nuclear@0 17 #include <OVR_CAPI.h>
nuclear@0 18 #include <OVR_CAPI_GL.h>
nuclear@0 19
nuclear@0 20 #define DISABLE_RETARDED_HEALTH_WARNING
nuclear@0 21
nuclear@0 22 /* just dropping the prototype here to avoid including CAPI_HSWDisplay.h */
nuclear@0 23 OVR_EXPORT void ovrhmd_EnableHSWDisplaySDKRender(ovrHmd hmd, ovrBool enabled);
nuclear@0 24
nuclear@0 25 static ovrHmd hmd;
nuclear@0 26 static void *optdb;
nuclear@0 27 static ovrEyeRenderDesc eye_render_desc[2];
nuclear@0 28 static ovrSizei eye_res[2];
nuclear@0 29 static ovrGLTexture eye_tex[2];
nuclear@0 30 static ovrFovPort eye_fov[2];
nuclear@0 31 static ovrPosef pose[2];
nuclear@0 32 static int deferred_init_done;
nuclear@0 33
nuclear@0 34 static int init(void)
nuclear@0 35 {
nuclear@0 36 int i, num_hmds;
nuclear@9 37 int use_fake = 0;
nuclear@14 38 ovrTrackingCaps tracking;
nuclear@0 39
nuclear@0 40 if(!ovr_Initialize()) {
nuclear@0 41 return -1;
nuclear@0 42 }
nuclear@0 43 printf("initialized LibOVR %s\n", ovr_GetVersionString());
nuclear@0 44
nuclear@0 45 if(!(num_hmds = ovrHmd_Detect())) {
nuclear@9 46 if(getenv("VR_LIBOVR_FAKE")) {
nuclear@9 47 use_fake = 1;
nuclear@9 48 num_hmds = 1;
nuclear@9 49 } else {
nuclear@9 50 ovr_Shutdown();
nuclear@9 51 return -1;
nuclear@9 52 }
nuclear@0 53 }
nuclear@0 54 printf("%d Oculus HMD(s) found\n", num_hmds);
nuclear@0 55
nuclear@0 56 hmd = 0;
nuclear@0 57 for(i=0; i<num_hmds; i++) {
nuclear@9 58 ovrHmd h = use_fake ? ovrHmd_CreateDebug(ovrHmd_DK2) : ovrHmd_Create(i);
nuclear@9 59 if(!h) {
nuclear@0 60 break;
nuclear@0 61 }
nuclear@0 62 printf(" [%d]: %s - %s\n", i, h->Manufacturer, h->ProductName);
nuclear@0 63
nuclear@0 64 if(!hmd) {
nuclear@0 65 hmd = h;
nuclear@0 66 } else {
nuclear@0 67 ovrHmd_Destroy(h);
nuclear@0 68 }
nuclear@0 69 }
nuclear@0 70
nuclear@0 71 if(!hmd) {
nuclear@0 72 fprintf(stderr, "failed to initialize any Oculus HMDs\n");
nuclear@0 73 return -1;
nuclear@0 74 }
nuclear@0 75
nuclear@14 76 tracking = ovrTrackingCap_Orientation | ovrTrackingCap_Position |
nuclear@14 77 ovrTrackingCap_MagYawCorrection;
nuclear@14 78 ovrHmd_ConfigureTracking(hmd, tracking, 0);
nuclear@0 79
nuclear@0 80 eye_fov[0] = hmd->DefaultEyeFov[0];
nuclear@0 81 eye_fov[1] = hmd->DefaultEyeFov[1];
nuclear@0 82
nuclear@0 83 eye_res[0] = ovrHmd_GetFovTextureSize(hmd, ovrEye_Left, eye_fov[0], 1.0);
nuclear@0 84 eye_res[1] = ovrHmd_GetFovTextureSize(hmd, ovrEye_Right, eye_fov[1], 1.0);
nuclear@0 85
nuclear@0 86 /* create the options database */
nuclear@0 87 if((optdb = create_options())) {
nuclear@11 88 set_option_int(optdb, VR_DISPLAY_WIDTH, hmd->Resolution.w);
nuclear@11 89 set_option_int(optdb, VR_DISPLAY_HEIGHT, hmd->Resolution.h);
nuclear@11 90 set_option_int(optdb, VR_LEYE_XRES, eye_res[0].w);
nuclear@11 91 set_option_int(optdb, VR_LEYE_YRES, eye_res[0].h);
nuclear@11 92 set_option_int(optdb, VR_REYE_XRES, eye_res[1].w);
nuclear@11 93 set_option_int(optdb, VR_REYE_YRES, eye_res[1].h);
nuclear@16 94 set_option_float(optdb, VR_RENDER_RES_SCALE, 1.0);
nuclear@11 95 set_option_float(optdb, VR_EYE_HEIGHT, ovrHmd_GetFloat(hmd, OVR_KEY_EYE_HEIGHT, OVR_DEFAULT_EYE_HEIGHT));
nuclear@11 96 set_option_float(optdb, VR_IPD, ovrHmd_GetFloat(hmd, OVR_KEY_IPD, OVR_DEFAULT_IPD));
nuclear@11 97 set_option_int(optdb, VR_WIN_XOFFS, hmd->WindowsPos.x);
nuclear@11 98 set_option_int(optdb, VR_WIN_YOFFS, hmd->WindowsPos.y);
nuclear@0 99 }
nuclear@0 100
nuclear@0 101 deferred_init_done = 0;
nuclear@0 102 return 0;
nuclear@0 103 }
nuclear@0 104
nuclear@0 105 static void deferred_init(void)
nuclear@0 106 {
nuclear@0 107 union ovrGLConfig glcfg;
nuclear@0 108 unsigned int dcaps;
nuclear@0 109 void *win = 0;
nuclear@0 110
nuclear@0 111 deferred_init_done = 1;
nuclear@0 112
nuclear@0 113 memset(&glcfg, 0, sizeof glcfg);
nuclear@0 114 glcfg.OGL.Header.API = ovrRenderAPI_OpenGL;
nuclear@0 115 glcfg.OGL.Header.RTSize = hmd->Resolution;
nuclear@0 116 glcfg.OGL.Header.Multisample = 1;
nuclear@0 117 #ifdef WIN32
nuclear@0 118 win = GetActiveWindow();
nuclear@0 119 /*glcfg.OGL.Window = win;
nuclear@0 120 glcfg.OGL.DC = wglGetCurrentDC();
nuclear@0 121 assert(glcfg.OGL.Window);
nuclear@0 122 assert(glcfg.OGL.DC);*/
nuclear@0 123 #endif
nuclear@0 124
nuclear@0 125 if(!(hmd->HmdCaps & ovrHmdCap_ExtendDesktop)) {
nuclear@0 126 ovrHmd_AttachToWindow(hmd, win, 0, 0);
nuclear@0 127 printf("running in \"direct-to-rift\" mode\n");
nuclear@0 128 } else {
nuclear@0 129 printf("running in \"extended desktop\" mode\n");
nuclear@0 130 }
nuclear@0 131 ovrHmd_SetEnabledCaps(hmd, ovrHmdCap_LowPersistence | ovrHmdCap_DynamicPrediction);
nuclear@0 132
nuclear@0 133 dcaps = ovrDistortionCap_Chromatic | ovrDistortionCap_Vignette | ovrDistortionCap_TimeWarp |
nuclear@0 134 ovrDistortionCap_Overdrive | ovrDistortionCap_NoRestore;
nuclear@0 135
nuclear@0 136 if(!ovrHmd_ConfigureRendering(hmd, &glcfg.Config, dcaps, eye_fov, eye_render_desc)) {
nuclear@0 137 fprintf(stderr, "failed to configure LibOVR distortion renderer\n");
nuclear@0 138 }
nuclear@0 139
nuclear@0 140 #ifdef DISABLE_RETARDED_HEALTH_WARNING
nuclear@0 141 ovrhmd_EnableHSWDisplaySDKRender(hmd, 0);
nuclear@0 142 #endif
nuclear@0 143 }
nuclear@0 144
nuclear@0 145 static void cleanup(void)
nuclear@0 146 {
nuclear@0 147 if(hmd) {
nuclear@0 148 ovrHmd_Destroy(hmd);
nuclear@0 149 ovr_Shutdown();
nuclear@0 150 }
nuclear@5 151 destroy_options(optdb);
nuclear@0 152 }
nuclear@0 153
nuclear@0 154 static int set_option(const char *opt, enum opt_type type, void *valp)
nuclear@0 155 {
nuclear@15 156 float fval;
nuclear@15 157
nuclear@0 158 switch(type) {
nuclear@0 159 case OTYPE_INT:
nuclear@15 160 fval = (float)*(int*)valp;
nuclear@0 161 set_option_int(optdb, opt, *(int*)valp);
nuclear@0 162 break;
nuclear@0 163
nuclear@0 164 case OTYPE_FLOAT:
nuclear@15 165 fval = *(float*)valp;
nuclear@15 166 set_option_float(optdb, opt, fval);
nuclear@0 167 break;
nuclear@0 168 }
nuclear@15 169
nuclear@16 170 if(hmd && strcmp(opt, VR_RENDER_RES_SCALE) == 0) {
nuclear@15 171 eye_res[0] = ovrHmd_GetFovTextureSize(hmd, ovrEye_Left, eye_fov[0], fval);
nuclear@15 172 eye_res[1] = ovrHmd_GetFovTextureSize(hmd, ovrEye_Right, eye_fov[1], fval);
nuclear@15 173
nuclear@15 174 set_option_int(optdb, VR_LEYE_XRES, eye_res[0].w);
nuclear@15 175 set_option_int(optdb, VR_LEYE_YRES, eye_res[0].h);
nuclear@15 176 set_option_int(optdb, VR_REYE_XRES, eye_res[1].w);
nuclear@15 177 set_option_int(optdb, VR_REYE_YRES, eye_res[1].h);
nuclear@15 178 }
nuclear@15 179
nuclear@0 180 return 0;
nuclear@0 181 }
nuclear@0 182
nuclear@0 183 static int get_option(const char *opt, enum opt_type type, void *valp)
nuclear@0 184 {
nuclear@0 185 switch(type) {
nuclear@0 186 case OTYPE_INT:
nuclear@0 187 return get_option_int(optdb, opt, valp);
nuclear@0 188 case OTYPE_FLOAT:
nuclear@0 189 return get_option_float(optdb, opt, valp);
nuclear@0 190 }
nuclear@0 191 return -1;
nuclear@0 192 }
nuclear@0 193
nuclear@7 194 static void translation(int eye, float *vec)
nuclear@0 195 {
nuclear@0 196 if(!hmd) {
nuclear@0 197 vec[0] = vec[1] = vec[2] = 0;
nuclear@9 198 return;
nuclear@0 199 }
nuclear@0 200
nuclear@0 201 pose[eye] = ovrHmd_GetEyePose(hmd, eye == VR_EYE_LEFT ? ovrEye_Left : ovrEye_Right);
nuclear@0 202 vec[0] = pose[eye].Position.x + eye_render_desc[eye].ViewAdjust.x;
nuclear@0 203 vec[1] = pose[eye].Position.y + eye_render_desc[eye].ViewAdjust.y;
nuclear@0 204 vec[2] = pose[eye].Position.z + eye_render_desc[eye].ViewAdjust.z;
nuclear@0 205 }
nuclear@0 206
nuclear@7 207 static void rotation(int eye, float *quat)
nuclear@0 208 {
nuclear@0 209 if(!hmd) {
nuclear@0 210 quat[0] = quat[1] = quat[2] = 0.0f;
nuclear@0 211 quat[3] = 1.0f;
nuclear@9 212 return;
nuclear@0 213 }
nuclear@0 214
nuclear@0 215 pose[eye] = ovrHmd_GetEyePose(hmd, eye == VR_EYE_LEFT ? ovrEye_Left : ovrEye_Right);
nuclear@0 216 quat[0] = pose[eye].Orientation.x;
nuclear@0 217 quat[1] = pose[eye].Orientation.y;
nuclear@0 218 quat[2] = pose[eye].Orientation.z;
nuclear@0 219 quat[3] = pose[eye].Orientation.w;
nuclear@0 220 }
nuclear@0 221
nuclear@0 222 static const float idmat[] = {1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1};
nuclear@0 223
nuclear@0 224 static void proj_matrix(int eye, float znear, float zfar, float *mat)
nuclear@0 225 {
nuclear@0 226 int i, j;
nuclear@0 227 ovrMatrix4f vmat;
nuclear@0 228
nuclear@0 229 if(!hmd) {
nuclear@0 230 memcpy(mat, idmat, sizeof idmat);
nuclear@0 231 return;
nuclear@0 232 }
nuclear@0 233
nuclear@0 234 vmat = ovrMatrix4f_Projection(eye_render_desc[eye].Fov, znear, zfar, 1);
nuclear@0 235
nuclear@0 236 for(i=0; i<4; i++) {
nuclear@0 237 for(j=0; j<4; j++) {
nuclear@0 238 *mat++ = vmat.M[j][i];
nuclear@0 239 }
nuclear@0 240 }
nuclear@0 241 }
nuclear@0 242
nuclear@0 243 static int new_frame = 1;
nuclear@0 244
nuclear@0 245 static void begin(int eye)
nuclear@0 246 {
nuclear@0 247 if(!hmd) return;
nuclear@0 248
nuclear@0 249 if(!deferred_init_done) {
nuclear@0 250 deferred_init();
nuclear@0 251 }
nuclear@0 252
nuclear@0 253 if(new_frame) {
nuclear@0 254 ovrHmd_BeginFrame(hmd, 0);
nuclear@0 255 new_frame = 0;
nuclear@0 256 }
nuclear@0 257 }
nuclear@0 258
nuclear@0 259 static int present(void)
nuclear@0 260 {
nuclear@0 261 if(!hmd) return 0;
nuclear@0 262
nuclear@0 263 ovrHmd_EndFrame(hmd, pose, &eye_tex[0].Texture);
nuclear@0 264 new_frame = 1;
nuclear@0 265
nuclear@0 266 return 1;
nuclear@0 267 }
nuclear@0 268
nuclear@0 269 static void set_eye_texture(int eye, unsigned int tex, float umin, float vmin, float umax, float vmax)
nuclear@0 270 {
nuclear@0 271 ovrSizei texsz;
nuclear@0 272 ovrRecti rect;
nuclear@0 273
nuclear@0 274 glBindTexture(GL_TEXTURE_2D, tex);
nuclear@0 275 glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &texsz.w);
nuclear@0 276 glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &texsz.h);
nuclear@0 277
nuclear@0 278 rect.Pos.x = (int)(umin * texsz.w);
nuclear@0 279 rect.Pos.y = (int)((vmin + 1.0 - vmax) * texsz.h);
nuclear@0 280 rect.Size.w = (int)((umax - umin) * texsz.w);
nuclear@0 281 rect.Size.h = (int)((vmax - vmin) * texsz.h);
nuclear@0 282
nuclear@0 283 eye_tex[eye].OGL.Header.API = ovrRenderAPI_OpenGL;
nuclear@0 284 eye_tex[eye].OGL.Header.TextureSize = texsz;
nuclear@0 285 eye_tex[eye].OGL.Header.RenderViewport = rect;
nuclear@0 286 eye_tex[eye].OGL.TexId = tex;
nuclear@0 287 }
nuclear@0 288
nuclear@0 289 static void recenter(void)
nuclear@0 290 {
nuclear@0 291 if(hmd) {
nuclear@0 292 ovrHmd_RecenterPose(hmd);
nuclear@0 293 }
nuclear@0 294 }
nuclear@0 295
nuclear@0 296 struct vr_module *vr_module_libovr(void)
nuclear@0 297 {
nuclear@0 298 static struct vr_module m;
nuclear@0 299
nuclear@0 300 if(!m.init) {
nuclear@0 301 m.name = "libovr";
nuclear@0 302 m.init = init;
nuclear@0 303 m.cleanup = cleanup;
nuclear@0 304 m.set_option = set_option;
nuclear@0 305 m.get_option = get_option;
nuclear@0 306 m.translation = translation;
nuclear@0 307 m.rotation = rotation;
nuclear@0 308 m.proj_matrix = proj_matrix;
nuclear@0 309 m.begin = begin;
nuclear@0 310 m.present = present;
nuclear@0 311 m.set_eye_texture = set_eye_texture;
nuclear@0 312 m.recenter = recenter;
nuclear@0 313 }
nuclear@0 314 return &m;
nuclear@0 315 }
nuclear@0 316
nuclear@0 317 #else /* no libovr */
nuclear@0 318
nuclear@0 319 static int init(void)
nuclear@0 320 {
nuclear@0 321 return -1;
nuclear@0 322 }
nuclear@0 323
nuclear@0 324 struct vr_module *vr_module_libovr(void)
nuclear@0 325 {
nuclear@0 326 static struct vr_module m;
nuclear@0 327
nuclear@0 328 if(!m.init) {
nuclear@0 329 m.name = "libovr";
nuclear@0 330 m.init = init;
nuclear@0 331 }
nuclear@0 332 return &m;
nuclear@0 333 }
nuclear@0 334
nuclear@0 335 #endif /* USE_LIBOVR */