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 }

27 path = datafile_path(path);

28

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

30 unsigned int tex = load_texture(path);

31 if(tex) {

32 textures[fname] = tex;

33 } else {

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

35 }

36 return tex;

37 }

38

39 unsigned int load_texture(const char *fname)

40 {

41 struct img_pixmap img;

42

43 img_init(&img);

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

45 img_destroy(&img);

46 return 0;

47 }

48

49 unsigned int intfmt = img_glintfmt(&img);

50 unsigned int fmt = img_glfmt(&img);

51 unsigned int type = img_gltype(&img);

52

53 unsigned int tex;

54 glGenTextures(1, &tex);

55 glBindTexture(GL_TEXTURE_2D, tex);

56 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);

57 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

58 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);

59 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

60

61 if(GLEW_SGIS_generate_mipmap) {

62 glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);

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

64 } else {

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

66 }

67

68 img_destroy(&img);

69 return tex;

70 }