1 #include <stdio.h>

2 #include <ctype.h>

3 #include "sgl.h"

4

5 void disp(void);

6 void reshape(int x, int y);

7 void keyb(int key, int state);

8 void mouse(int pidx, int bn, int state, int x, int y);

9 void motion(int pidx, int x, int y);

10

11

12 int main(void)

13 {

14 if(sgl_init() == -1) {

15 return 1;

16 }

17

18 sgl_create_window(640, 480, SGL_DOUBLE | SGL_DEPTH);

19

20 sgl_display_callback(disp);

21 sgl_reshape_callback(reshape);

22 sgl_keyboard_callback(keyb);

23 sgl_mouse_callback(mouse);

24 sgl_motion_callback(motion);

25

26 sgl_event_loop();

27 sgl_quit();

28 return 0;

29 }

30

31

32 void disp(void)

33 {

34 sgl_log("redisplay\n");

35

36 glClearColor(0.2, 0.2, 0.2, 1);

37 glClear(GL_COLOR_BUFFER_BIT);

38

39 #ifndef GL_ES_VERSION_2_0

40 glBegin(GL_QUADS);

41 glColor3f(1, 0, 0);

42 glVertex2f(-1, -1);

43 glColor3f(0, 1, 0);

44 glVertex2f(1, -1);

45 glColor3f(0, 0, 1);

46 glVertex2f(1, 1);

47 glColor3f(1, 1, 0);

48 glVertex2f(-1, 1);

49 glEnd();

50 #endif

51

52 sgl_swap_buffers();

53 }

54

55 void reshape(int x, int y)

56 {

57 printf("reshape: %dx%d\n", x, y);

58 glViewport(0, 0, x, y);

59 }

60

61 void keyb(int key, int state)

62 {

63 char *ststr = state ? "pressed" : "released";

64

65 if(key < 0xff && isprint(key)) {

66 sgl_log("keyboard: '%c' %s\n", (char)key, ststr);

67 } else {

68 sgl_log("keyboard: %x %s\n", key, ststr);

69 }

70

71 if(key == 27) {

72 sgl_quit();

73 }

74 }

75

76 void mouse(int pidx, int bn, int state, int x, int y)

77 {

78 printf("mouse: button%d %s (ptr: %d %d)\n", bn, state ? "pressed" : "released", x, y);

79 }

80

81 void motion(int pidx, int x, int y)

82 {

83 printf("mouse dragged to: (%d %d)\n", x, y);

84 }