conworlds: 782ff06817fb src/vr/vr

conworlds

view src/vr/vr_libovr.c @ 20:782ff06817fb

merged ...

author	John Tsiombikas <nuclear@member.fsf.org>
date	Tue, 26 Aug 2014 18:42:53 +0300
parents	5dc4e2b8f6f5
children

line source

1 #ifdef WIN32

2 #define OVR_OS_WIN32

3 #endif

5 #include "vr_impl.h"

7 #ifdef USE_LIBOVR

8 #include <stdio.h>

9 #include <stdlib.h>

10 #include <assert.h>

11 #include "opt.h"

13 #include <OVR_CAPI.h>

14 #include <OVR_CAPI_GL.h>

16 #define DISABLE_RETARDED_HEALTH_WARNING

18 /* just dropping the prototype here to avoid including CAPI_HSWDisplay.h */

19 OVR_EXPORT void ovrhmd_EnableHSWDisplaySDKRender(ovrHmd hmd, ovrBool enabled);

21 static ovrHmd hmd;

22 static void *optdb;

23 static ovrEyeRenderDesc eye_render_desc[2];

24 static ovrSizei eye_res[2];

25 static ovrGLTexture eye_tex[2];

26 static ovrFovPort eye_fov[2];

27 static ovrPosef pose[2];

28 static int deferred_init_done;

30 static int init(void)

31 {

32 int i, num_hmds;

34 if(!ovr_Initialize()) {

35 return -1;

36 }

37 printf("initialized LibOVR %s\n", ovr_GetVersionString());

39 if(!(num_hmds = ovrHmd_Detect())) {

40 ovr_Shutdown();

41 return -1;

42 }

43 printf("%d Oculus HMD(s) found\n", num_hmds);

45 hmd = 0;

46 for(i=0; i<num_hmds; i++) {

47 ovrHmd h;

48 if(!(h = ovrHmd_Create(i))) {

49 break;

50 }

51 printf(" [%d]: %s - %s\n", i, h->Manufacturer, h->ProductName);

53 if(!hmd) {

54 hmd = h;

55 } else {

56 ovrHmd_Destroy(h);

57 }

58 }

60 if(!hmd) {

61 fprintf(stderr, "failed to initialize any Oculus HMDs\n");

62 return -1;

63 }

65 ovrHmd_ConfigureTracking(hmd, 0xffffffff, 0);

67 eye_fov[0] = hmd->DefaultEyeFov[0];

68 eye_fov[1] = hmd->DefaultEyeFov[1];

70 eye_res[0] = ovrHmd_GetFovTextureSize(hmd, ovrEye_Left, eye_fov[0], 1.0);

71 eye_res[1] = ovrHmd_GetFovTextureSize(hmd, ovrEye_Right, eye_fov[1], 1.0);

73 /* create the options database */

74 if((optdb = create_options())) {

75 set_option_int(optdb, VR_OPT_DISPLAY_WIDTH, hmd->Resolution.w);

76 set_option_int(optdb, VR_OPT_DISPLAY_HEIGHT, hmd->Resolution.h);

77 set_option_int(optdb, VR_OPT_LEYE_XRES, eye_res[0].w);

78 set_option_int(optdb, VR_OPT_LEYE_YRES, eye_res[0].h);

79 set_option_int(optdb, VR_OPT_REYE_XRES, eye_res[1].w);

80 set_option_int(optdb, VR_OPT_REYE_YRES, eye_res[1].h);

81 set_option_float(optdb, VR_OPT_EYE_HEIGHT, ovrHmd_GetFloat(hmd, OVR_KEY_EYE_HEIGHT, OVR_DEFAULT_EYE_HEIGHT));

82 set_option_float(optdb, VR_OPT_IPD, ovrHmd_GetFloat(hmd, OVR_KEY_IPD, OVR_DEFAULT_IPD));

83 set_option_int(optdb, VR_OPT_WIN_XOFFS, hmd->WindowsPos.x);

84 set_option_int(optdb, VR_OPT_WIN_YOFFS, hmd->WindowsPos.y);

85 }

87 deferred_init_done = 0;

88 return 0;

89 }

91 static void deferred_init(void)

92 {

93 union ovrGLConfig glcfg;

94 unsigned int dcaps;

95 void *win = 0;

97 deferred_init_done = 1;

99 memset(&glcfg, 0, sizeof glcfg);

100 glcfg.OGL.Header.API = ovrRenderAPI_OpenGL;

101 glcfg.OGL.Header.RTSize = hmd->Resolution;

102 glcfg.OGL.Header.Multisample = 1;

103 #ifdef WIN32

104 win = GetActiveWindow();

105 /*glcfg.OGL.Window = win;

106 glcfg.OGL.DC = wglGetCurrentDC();

107 assert(glcfg.OGL.Window);

108 assert(glcfg.OGL.DC);*/

109 #endif

110

111 if(!(hmd->HmdCaps & ovrHmdCap_ExtendDesktop)) {

112 ovrHmd_AttachToWindow(hmd, win, 0, 0);

113 printf("running in \"direct-to-rift\" mode\n");

114 } else {

115 printf("running in \"extended desktop\" mode\n");

116 }

117 ovrHmd_SetEnabledCaps(hmd, ovrHmdCap_LowPersistence | ovrHmdCap_DynamicPrediction);

118

119 dcaps = ovrDistortionCap_Chromatic | ovrDistortionCap_Vignette | ovrDistortionCap_TimeWarp |

120 ovrDistortionCap_Overdrive | ovrDistortionCap_NoRestore;

121

122 if(!ovrHmd_ConfigureRendering(hmd, &glcfg.Config, dcaps, eye_fov, eye_render_desc)) {

123 fprintf(stderr, "failed to configure LibOVR distortion renderer\n");

124 }

125

126 #ifdef DISABLE_RETARDED_HEALTH_WARNING

127 ovrhmd_EnableHSWDisplaySDKRender(hmd, 0);

128 #endif

129 }

130

131 static void cleanup(void)

132 {

133 if(hmd) {

134 ovrHmd_Destroy(hmd);

135 ovr_Shutdown();

136 }

137 }

138

139 static int set_option(const char *opt, enum opt_type type, void *valp)

140 {

141 switch(type) {

142 case OTYPE_INT:

143 set_option_int(optdb, opt, *(int*)valp);

144 break;

145

146 case OTYPE_FLOAT:

147 set_option_float(optdb, opt, *(float*)valp);

148 break;

149 }

150 return 0;

151 }

152

153 static int get_option(const char *opt, enum opt_type type, void *valp)

154 {

155 switch(type) {

156 case OTYPE_INT:

157 return get_option_int(optdb, opt, valp);

158 case OTYPE_FLOAT:

159 return get_option_float(optdb, opt, valp);

160 }

161 return -1;

162 }

163

164 static int translation(int eye, float *vec)

165 {

166 if(!hmd) {

167 vec[0] = vec[1] = vec[2] = 0;

168 return 0;

169 }

170

171 pose[eye] = ovrHmd_GetEyePose(hmd, eye == VR_EYE_LEFT ? ovrEye_Left : ovrEye_Right);

172 vec[0] = pose[eye].Position.x;

173 vec[1] = pose[eye].Position.y;

174 vec[2] = pose[eye].Position.z;

175 return 1;

176 }

177

178 static int rotation(int eye, float *quat)

179 {

180 if(!hmd) {

181 quat[0] = quat[1] = quat[2] = 0.0f;

182 quat[3] = 1.0f;

183 return 0;

184 }

185

186 pose[eye] = ovrHmd_GetEyePose(hmd, eye == VR_EYE_LEFT ? ovrEye_Left : ovrEye_Right);

187 quat[0] = pose[eye].Orientation.x;

188 quat[1] = pose[eye].Orientation.y;

189 quat[2] = pose[eye].Orientation.z;

190 quat[3] = pose[eye].Orientation.w;

191 return 1;

192 }

193

194 static const float idmat[] = {1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1};

195

196 static void proj_matrix(int eye, float znear, float zfar, float *mat)

197 {

198 int i, j;

199 ovrMatrix4f vmat;

200

201 if(!hmd) {

202 memcpy(mat, idmat, sizeof idmat);

203 return;

204 }

205

206 vmat = ovrMatrix4f_Projection(eye_render_desc[eye].Fov, znear, zfar, 1);

207

208 for(i=0; i<4; i++) {

209 for(j=0; j<4; j++) {

210 *mat++ = vmat.M[j][i];

211 }

212 }

213 }

214

215 static int new_frame = 1;

216

217 static void begin(int eye)

218 {

219 if(!hmd) return;

220

221 if(!deferred_init_done) {

222 deferred_init();

223 }

224

225 if(new_frame) {

226 ovrHmd_BeginFrame(hmd, 0);

227 new_frame = 0;

228 }

229 }

230

231 static int present(void)

232 {

233 if(!hmd) return 0;

234

235 ovrHmd_EndFrame(hmd, pose, &eye_tex[0].Texture);

236 new_frame = 1;

237

238 return 1;

239 }

240

241 static void set_eye_texture(int eye, unsigned int tex, float umin, float vmin, float umax, float vmax)

242 {

243 ovrSizei texsz;

244 ovrRecti rect;

245

246 glBindTexture(GL_TEXTURE_2D, tex);

247 glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &texsz.w);

248 glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &texsz.h);

249

250 rect.Pos.x = (int)(umin * texsz.w);

251 rect.Pos.y = (int)((vmin + 1.0 - vmax) * texsz.h);

252 rect.Size.w = (int)((umax - umin) * texsz.w);

253 rect.Size.h = (int)((vmax - vmin) * texsz.h);

254

255 eye_tex[eye].OGL.Header.API = ovrRenderAPI_OpenGL;

256 eye_tex[eye].OGL.Header.TextureSize = texsz;

257 eye_tex[eye].OGL.Header.RenderViewport = rect;

258 eye_tex[eye].OGL.TexId = tex;

259 }

260

261 static void recenter(void)

262 {

263 if(hmd) {

264 ovrHmd_RecenterPose(hmd);

265 }

266 }

267

268 struct vr_module *vr_module_libovr(void)

269 {

270 static struct vr_module m;

271

272 if(!m.init) {

273 m.name = "libovr";

274 m.init = init;

275 m.cleanup = cleanup;

276 m.set_option = set_option;

277 m.get_option = get_option;

278 m.translation = translation;

279 m.rotation = rotation;

280 m.proj_matrix = proj_matrix;

281 m.begin = begin;

282 m.present = present;

283 m.set_eye_texture = set_eye_texture;

284 m.recenter = recenter;

285 }

286 return &m;

287 }

288

289 #else /* no libovr */

290

291 static int init(void)

292 {

293 return -1;

294 }

295

296 struct vr_module *vr_module_libovr(void)

297 {

298 static struct vr_module m;

299

300 if(!m.init) {

301 m.name = "libovr";

302 m.init = init;

303 }

304 return &m;

305 }

306

307 #endif /* USE_LIBOVR */