1 #include <string.h>

2 #include "opengl.h"

3 #include "imago2.h"

4 #include "texman.h"

5 #include "datapath.h"

6

7 unsigned int load_texture(const char *fname);

8

9 TextureSet::~TextureSet()

10 {

11 for(auto iter : textures) {

12 glDeleteTextures(1, &iter.second);

13 }

14 }

15

16 unsigned int TextureSet::get_texture(const char *fname) const

17 {

18 auto iter = textures.find(fname);

19 if(iter != textures.end()) {

20 return iter->second;

21 }

22

23 const char *path, *slash;

24 if((slash = strrchr(fname, '/'))) {

25 path = slash + 1;

26 } else {

27 path = fname;

28 }

29 if(!(path = datafile_path(path))) {

30 fprintf(stderr, "can't find texture: %s\n", fname);

31 return 0;

32 }

33

34 printf("loading texture: %s\n", path);

35 unsigned int tex = load_texture(path);

36 if(tex) {

37 textures[fname] = tex;

38 } else {

39 fprintf(stderr, "failed to load texture: %s\n", path);

40 }

41 return tex;

42 }

43

44 unsigned int load_texture(const char *fname)

45 {

46 struct img_pixmap img;

47

48 img_init(&img);

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

50 img_destroy(&img);

51 return 0;

52 }

53

54 unsigned int intfmt = img_glintfmt(&img);

55 unsigned int fmt = img_glfmt(&img);

56 unsigned int type = img_gltype(&img);

57

58 unsigned int tex;

59 glGenTextures(1, &tex);

60 glBindTexture(GL_TEXTURE_2D, tex);

61 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);

62 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

63 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);

64 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

65

66 if(GLEW_SGIS_generate_mipmap) {

67 glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);

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

69 } else {

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

71 }

72

73 img_destroy(&img);

74 return tex;

75 }