1 #ifndef VR_H_

2 #define VR_H_

3

4 /* unit: pixels */

5 #define VR_DISPLAY_WIDTH "display-xres"

6 #define VR_DISPLAY_HEIGHT "display-yres"

7 #define VR_LEYE_XRES "left-eye-xres"

8 #define VR_LEYE_YRES "left-eye-yres"

9 #define VR_REYE_XRES "right-eye-xres"

10 #define VR_REYE_YRES "right-eye-yres"

11 #define VR_RENDER_XRES "render-xres" /* VR_LEYE_XRES + VR_REYE_XRES */

12 #define VR_RENDER_YRES "render-yres" /* max(VR_LEYE_YRES, VR_REYE_YRES) */

13 #define VR_WIN_XOFFS "win-xoffset"

14 #define VR_WIN_YOFFS "win-yoffset"

15 #define VR_RENDER_RES_SCALE "render-res-scale" /* default 1 */

16 /* unit: meters */

17 #define VR_EYE_HEIGHT "eye-height"

18 #define VR_IPD "ipd"

19 #define VR_LEYE_OFFSET "left-eye-offset" /* stereo offset from center of the head */

20 #define VR_REYE_OFFSET "right-eye-offset" /* stereo offset from center of the head */

21 /* misc options */

22 #define VR_NULL_STEREO_SBS "null-stereo-sbs" /* bool, default 0: draw side-by-side */

23 #define VR_NULL_STEREO_GL "null-stereo-gl" /* bool, default 0: use quad-buffer stereo */

24

25 enum {

26 VR_EYE_LEFT,

27 VR_EYE_RIGHT

28 };

29

30 #ifdef __cplusplus

31 extern "C" {

32 #endif

33

34 int vr_init(void);

35 void vr_shutdown(void);

36

37 int vr_module_count(void);

38 const char *vr_module_name(int idx);

39

40 int vr_use_module(int idx);

41 int vr_use_module_named(const char *name);

42

43 void vr_seti(const char *optname, int val);

44 void vr_setf(const char *optname, float val);

45 int vr_geti(const char *optname);

46 float vr_getf(const char *optname);

47 float *vr_getfv(const char *optname, float *res);

48 /* variants of the get functions, with an additional "default value"

49 * argument, which is returned if the requested option is missing

50 */

51 int vr_geti_def(const char *optname, int def_val);

52 float vr_getf_def(const char *optname, float def_val);

53

54 int vr_view_translation(int eye, float *vec);

55 int vr_view_rotation(int eye, float *quat);

56

57 /* returns non-zero if the active vr module provides this kind of matrix

58 * information, otherwise it returns zero, and sets mat to identity

59 */

60 int vr_view_matrix(int eye, float *mat);

61 int vr_proj_matrix(int eye, float znear, float zfar, float *mat);

62

63 void vr_begin(int eye);

64 void vr_end(void);

65 int vr_swap_buffers(void);

66

67 /* set the output texture or separate textures for each eye */

68 void vr_output_texture(unsigned int tex, float umin, float vmin, float umax, float vmax);

69 void vr_output_texture_eye(int eye, unsigned int tex, float umin, float vmin, float umax, float vmax);

70

71 void vr_recenter(void);

72

73 #ifdef __cplusplus

74 }

75 #endif

76

77 #endif /* VR_H_ */