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 /* misc options */

20 #define VR_NULL_STEREO "null-stereo" /* bool, default 0 */

21

22 enum {

23 VR_EYE_LEFT,

24 VR_EYE_RIGHT

25 };

26

27 #ifdef __cplusplus

28 extern "C" {

29 #endif

30

31 int vr_init(void);

32 void vr_shutdown(void);

33

34 int vr_module_count(void);

35 const char *vr_module_name(int idx);

36

37 int vr_use_module(int idx);

38 int vr_use_module_named(const char *name);

39

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

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

42 int vr_geti(const char *optname);

43 float vr_getf(const char *optname);

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

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

46 */

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

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

49

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

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

52

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

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

55 */

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

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

58

59 void vr_begin(int eye);

60 void vr_end(void);

61 int vr_swap_buffers(void);

62

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

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

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

66

67 void vr_recenter(void);

68

69 #ifdef __cplusplus

70 }

71 #endif

72

73 #endif /* VR_H_ */