1 #include <GL/gl.h>

2 #include <X11/Xlib.h>

3 #include "texture.h"

4 #include "logger.h"

5

6 Texture::Texture()

7 {

8 glGenTextures(1, &tex);

9 glBindTexture(GL_TEXTURE_2D, tex);

10 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

11 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

12

13 width = height = 0;

14 }

15

16 Texture::~Texture()

17 {

18 if(tex) {

19 glDeleteTextures(1, &tex);

20 }

21 }

22

23 void Texture::set_image(int x, int y, unsigned char *pix)

24 {

25 glBindTexture(GL_TEXTURE_2D, tex);

26

27 if(x == width && y == height) {

28 if(pix) {

29 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, x, y, GL_BGRA, GL_UNSIGNED_BYTE, pix);

30 }

31

32 } else {

33 width = x;

34 height = y;

35 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, x, y, 0, GL_BGRA, GL_UNSIGNED_BYTE,

36 pix ? pix : 0);

37 }

38 }

39

40 void Texture::set_image(Display *dpy, Pixmap pixmap)

41 {

42 Window root_ret;

43 int x, y;

44 unsigned int w, h, border, depth;

45 XGetGeometry(dpy, pixmap, &root_ret, &x, &y, &w, &h, &border, &depth);

46

47 XImage *ximg = XGetImage(dpy, pixmap, 0, 0, w, h, 0xffffffff, ZPixmap);

48 if(!ximg) {

49 log_error("XGetImage failed to create an image from the window pixmap\n");

50 return;

51 }

52

53 glBindTexture(GL_TEXTURE_2D, tex);

54

55 if((int)w == width && (int)h == height) {

56 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, w, h, GL_BGRA, GL_UNSIGNED_BYTE, ximg->data);

57 } else {

58 width = w;

59 height = h;

60 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_BGRA, GL_UNSIGNED_BYTE, ximg->data);

61 }

62 }

63

64 int Texture::get_width() const

65 {

66 return width;

67 }

68

69 int Texture::get_height() const

70 {

71 return height;

72 }

73

74 unsigned int Texture::get_id() const

75 {

76 return tex;

77 }