1 #include "opengl.h"

2 #include "imago2.h"

3 #include "texture.h"

4

5 unsigned int load_texture(const char *fname)

6 {

7 struct img_pixmap img;

8

9 img_init(&img);

10 if(img_load(&img, fname) == -1) {

11 img_destroy(&img);

12 return 0;

13 }

14

15 unsigned int intfmt = img_glintfmt(&img);

16 unsigned int fmt = img_glfmt(&img);

17 unsigned int type = img_gltype(&img);

18

19 unsigned int tex;

20 glGenTextures(1, &tex);

21 glBindTexture(GL_TEXTURE_2D, tex);

22 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);

23 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

24 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);

25 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

26

27 if(GLEW_SGIS_generate_mipmap) {

28 glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);

29 glTexImage2D(GL_TEXTURE_2D, 0, intfmt, img.width, img.height, 0, fmt, type, img.pixels);

30 } else {

31 gluBuild2DMipmaps(GL_TEXTURE_2D, intfmt, img.width, img.height, fmt, type, img.pixels);

32 }

33

34 img_destroy(&img);

35 return tex;

36 }

37

38 void destroy_texture(unsigned int tex)

39 {

40 glDeleteTextures(1, &tex);

41 }