1 #ifdef WIN32

2 #define WIN32_LEAN_AND_MEAN

3 #include <windows.h>

4 #endif

5

6 #ifdef __APPLE__

7 #include <OpenGL/gl.h>

8 #else

9 #include <GL/gl.h>

10 #endif

11

12 #include "vr_impl.h"

13

14 static unsigned int eye_tex[2];

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

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

17

18 static int init(void)

19 {

20 return 0;

21 }

22

23 static void present(void)

24 {

25 int i;

26

27 glPushAttrib(GL_ENABLE_BIT | GL_TRANSFORM_BIT);

28

29 glDisable(GL_LIGHTING);

30 glDisable(GL_DEPTH_TEST);

31 glDisable(GL_FOG);

32 glDisable(GL_CULL_FACE);

33

34 glEnable(GL_TEXTURE_2D);

35

36 glMatrixMode(GL_MODELVIEW);

37 glLoadIdentity();

38 glMatrixMode(GL_PROJECTION);

39 glLoadIdentity();

40

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

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

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

44

45 glBindTexture(GL_TEXTURE_2D, eye_tex[i]);

46

47 glBegin(GL_QUADS);

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

49 glVertex2f(x0, -1);

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

51 glVertex2f(x1, -1);

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

53 glVertex2f(x1, 1);

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

55 glVertex2f(x0, 1);

56 glEnd();

57 }

58

59 glPopMatrix();

60 glMatrixMode(GL_MODELVIEW);

61 glPopMatrix();

62

63 glPopAttrib();

64

65 #ifdef WIN32

66 SwapBuffers(wglGetCurrentDC());

67 #endif

68 }

69

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

71 {

72 eye_tex[eye] = tex;

73 tex_umin[eye] = umin;

74 tex_umax[eye] = umax;

75 tex_vmin[eye] = vmin;

76 tex_vmax[eye] = vmax;

77 }

78

79 struct vr_module *vr_module_null(void)

80 {

81 static struct vr_module m;

82

83 if(!m.init) {

84 m.name = "null";

85 m.init = init;

86 m.set_eye_texture = set_eye_texture;

87 m.present = present;

88 }

89 return &m;

90 }