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annotate src/tex.c @ 26:862a3329a8f0

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wohooo, added a shitload of code from zlib/libpng/libjpeg. When the good lord was raining shared libraries the iphone held a fucking umbrella...
author John Tsiombikas <nuclear@mutantstargoat.com>
date Thu, 08 Sep 2011 06:28:38 +0300
parents 206348366635
children fd39c0198935
rev   line source
nuclear@14 1 #include <stdio.h>
nuclear@14 2 #include <stdlib.h>
nuclear@14 3 #include <string.h>
nuclear@14 4 #include <errno.h>
nuclear@14 5 #include "opengl.h"
nuclear@14 6 #include "tex.h"
nuclear@15 7 #include "config.h"
nuclear@26 8 #include "imago2.h"
nuclear@14 9
nuclear@14 10 unsigned int load_texture(const char *fname)
nuclear@14 11 {
nuclear@26 12 int xsz, ysz;
nuclear@14 13 unsigned int tex;
nuclear@26 14 void *pixels;
nuclear@14 15
nuclear@26 16 if(!(pixels = img_load_pixels(fname, &xsz, &ysz, IMG_FMT_RGBA32))) {
nuclear@26 17 fprintf(stderr, "failed to load image: %s\n", fname);
nuclear@14 18 return 0;
nuclear@14 19 }
nuclear@14 20
nuclear@14 21 glGenTextures(1, &tex);
nuclear@14 22 glBindTexture(GL_TEXTURE_2D, tex);
nuclear@14 23 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
nuclear@14 24 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
nuclear@14 25 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@14 26 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@25 27 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
nuclear@26 28 img_free_pixels(pixels);
nuclear@14 29
nuclear@14 30 return tex;
nuclear@14 31 }
nuclear@15 32
nuclear@15 33 void bind_texture(unsigned int tex, int unit)
nuclear@15 34 {
nuclear@15 35 glActiveTexture(GL_TEXTURE0 + unit);
nuclear@15 36
nuclear@15 37 #ifndef IPHONE
nuclear@15 38 if(tex) {
nuclear@15 39 glEnable(GL_TEXTURE_2D);
nuclear@15 40 } else {
nuclear@15 41 glDisable(GL_TEXTURE_2D);
nuclear@15 42 }
nuclear@15 43 #endif
nuclear@15 44
nuclear@15 45 glBindTexture(GL_TEXTURE_2D, tex);
nuclear@15 46 }