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_WIN_XOFFS "win-xoffset"

12 #define VR_WIN_YOFFS "win-yoffset"

13 /* unit: meters */

14 #define VR_EYE_HEIGHT "eye-height"

15 #define VR_IPD "ipd"

16

17 enum {

18 VR_EYE_LEFT,

19 VR_EYE_RIGHT

20 };

21

22 #ifdef __cplusplus

23 extern "C" {

24 #endif

25

26 int vr_init(void);

27 void vr_shutdown(void);

28

29 int vr_module_count(void);

30 const char *vr_module_name(int idx);

31

32 int vr_use_module(int idx);

33 int vr_use_module_named(const char *name);

34

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

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

37 int vr_geti(const char *optname);

38 float vr_getf(const char *optname);

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

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

41 */

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

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

44

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

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

47

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

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

50 */

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

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

53

54 void vr_begin(int eye);

55 void vr_end(void);

56 int vr_swap_buffers(void);

57

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

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

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

61

62 void vr_recenter(void);

63

64 #ifdef __cplusplus

65 }

66 #endif

67

68 #endif /* VR_H_ */