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1 #ifndef VR_H_
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2 #define VR_H_
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3
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4 /* unit: pixels */
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5 #define VR_DISPLAY_WIDTH "display-xres"
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6 #define VR_DISPLAY_HEIGHT "display-yres"
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7 #define VR_LEYE_XRES "left-eye-xres"
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8 #define VR_LEYE_YRES "left-eye-yres"
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9 #define VR_REYE_XRES "right-eye-xres"
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10 #define VR_REYE_YRES "right-eye-yres"
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11 #define VR_RENDER_XRES "render-xres" /* VR_LEYE_XRES + VR_REYE_XRES */
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12 #define VR_RENDER_YRES "render-yres" /* max(VR_LEYE_YRES, VR_REYE_YRES) */
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13 #define VR_WIN_XOFFS "win-xoffset"
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14 #define VR_WIN_YOFFS "win-yoffset"
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15 #define VR_RENDER_RES_SCALE "render-res-scale" /* default 1 */
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16 /* unit: meters */
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17 #define VR_EYE_HEIGHT "eye-height"
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18 #define VR_IPD "ipd"
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19 #define VR_LEYE_OFFSET "left-eye-offset" /* stereo offset from center of the head */
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20 #define VR_REYE_OFFSET "right-eye-offset" /* stereo offset from center of the head */
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21 /* misc options */
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22 #define VR_NULL_STEREO "null-stereo" /* bool, default 0 */
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23
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24 enum {
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25 VR_EYE_LEFT,
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26 VR_EYE_RIGHT
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27 };
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28
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29 #ifdef __cplusplus
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30 extern "C" {
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31 #endif
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32
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33 int vr_init(void);
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34 void vr_shutdown(void);
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35
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36 int vr_module_count(void);
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37 const char *vr_module_name(int idx);
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38
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39 int vr_use_module(int idx);
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40 int vr_use_module_named(const char *name);
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41
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42 void vr_seti(const char *optname, int val);
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43 void vr_setf(const char *optname, float val);
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44 int vr_geti(const char *optname);
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45 float vr_getf(const char *optname);
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46 float *vr_getfv(const char *optname, float *res);
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47 /* variants of the get functions, with an additional "default value"
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48 * argument, which is returned if the requested option is missing
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49 */
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50 int vr_geti_def(const char *optname, int def_val);
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51 float vr_getf_def(const char *optname, float def_val);
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52
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53 int vr_view_translation(int eye, float *vec);
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54 int vr_view_rotation(int eye, float *quat);
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55
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56 /* returns non-zero if the active vr module provides this kind of matrix
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57 * information, otherwise it returns zero, and sets mat to identity
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58 */
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59 int vr_view_matrix(int eye, float *mat);
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60 int vr_proj_matrix(int eye, float znear, float zfar, float *mat);
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61
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62 void vr_begin(int eye);
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63 void vr_end(void);
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64 int vr_swap_buffers(void);
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65
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66 /* set the output texture or separate textures for each eye */
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67 void vr_output_texture(unsigned int tex, float umin, float vmin, float umax, float vmax);
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68 void vr_output_texture_eye(int eye, unsigned int tex, float umin, float vmin, float umax, float vmax);
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69
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70 void vr_recenter(void);
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71
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72 #ifdef __cplusplus
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73 }
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74 #endif
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75
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76 #endif /* VR_H_ */
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