labyrinth: src/texture.c annotate

labyrinth

added helpful comment

author	John Tsiombikas <nuclear@member.fsf.org>
date	Fri, 06 Feb 2015 00:34:04 +0200
parents
children	c8826e5ebec1

rev	line source
nuclear@0	1 #include <stdio.h>
nuclear@0	2 #include "texture.h"
nuclear@0	3 #include "image.h"
nuclear@0	4 #include "opengl.h"
nuclear@0	5
nuclear@0	6 #ifndef GL_GENERATE_MIPMAP_SGIS
nuclear@0	7 #define GL_GENERATE_MIPMAP_SGIS 0x8191
nuclear@0	8 #endif
nuclear@0	9
nuclear@0	10 unsigned int load_texture(const char *fname)
nuclear@0	11 {
nuclear@0	12 unsigned int tex;
nuclear@0	13 struct image *img;
nuclear@0	14
nuclear@0	15 if(!(img = load_image(fname))) {
nuclear@0	16 fprintf(stderr, "failed to load image: %s\n", fname);
nuclear@0	17 return 0;
nuclear@0	18 }
nuclear@0	19
nuclear@0	20 glGenTextures(1, &tex);
nuclear@0	21 glBindTexture(GL_TEXTURE_2D, tex);
nuclear@0	22 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
nuclear@0	23 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@0	24 glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
nuclear@0	25 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, img->width, img->height, 0, GL_RGB, GL_UNSIGNED_BYTE, img->pixels);
nuclear@0	26 free_image(img);
nuclear@0	27 return tex;
nuclear@0	28 }