1 #ifdef WIN32

2 #define WIN32_LEAN_AND_MEAN

3 #include <windows.h>

4 #endif

5 #ifdef __APPLE__

6 #include <OpenGL/gl.h>

7 #else

8 #include <GL/gl.h>

9 #endif

10 #include "vr_impl.h"

11

12 static unsigned int eye_tex[2];

13 static float tex_umin[2], tex_umax[2];

14 static float tex_vmin[2], tex_vmax[2];

15

16 static int init(void)

17 {

18 return 0;

19 }

20

21 static int present(void)

22 {

23 int i;

24

25 glPushAttrib(GL_ENABLE_BIT | GL_TRANSFORM_BIT);

26

27 glDisable(GL_LIGHTING);

28 glDisable(GL_DEPTH_TEST);

29 glDisable(GL_FOG);

30 glDisable(GL_CULL_FACE);

31

32 glEnable(GL_TEXTURE_2D);

33

34 glMatrixMode(GL_MODELVIEW);

35 glLoadIdentity();

36 glMatrixMode(GL_PROJECTION);

37 glLoadIdentity();

38

39 for(i=0; i<2; i++) {

40 float x0 = i == 0 ? -1 : 0;

41 float x1 = i == 0 ? 0 : 1;

42

43 glBindTexture(GL_TEXTURE_2D, eye_tex[i]);

44

45 glBegin(GL_QUADS);

46 glTexCoord2f(tex_umin[i], tex_vmin[i]);

47 glVertex2f(x0, -1);

48 glTexCoord2f(tex_umax[i], tex_vmin[i]);

49 glVertex2f(x1, -1);

50 glTexCoord2f(tex_umax[i], tex_vmax[i]);

51 glVertex2f(x1, 1);

52 glTexCoord2f(tex_umin[i], tex_vmax[i]);

53 glVertex2f(x0, 1);

54 glEnd();

55 }

56

57 glPopMatrix();

58 glMatrixMode(GL_MODELVIEW);

59 glPopMatrix();

60

61 glPopAttrib();

62 return 0;

63 }

64

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

66 {

67 eye_tex[eye] = tex;

68 tex_umin[eye] = umin;

69 tex_umax[eye] = umax;

70 tex_vmin[eye] = vmin;

71 tex_vmax[eye] = vmax;

72 }

73

74 struct vr_module *vr_module_null(void)

75 {

76 static struct vr_module m;

77

78 if(!m.init) {

79 m.name = "null";

80 m.init = init;

81 m.set_eye_texture = set_eye_texture;

82 m.present = present;

83 }

84 return &m;

85 }