1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/tex.c	Sun Apr 22 03:35:18 2012 +0300
     1.3 @@ -0,0 +1,65 @@
     1.4 +#include <imago2.h>
     1.5 +#include "opengl.h"
     1.6 +
     1.7 +static void bind_common(GLenum type, unsigned int tex, int tex_unit);
     1.8 +
     1.9 +unsigned int load_texture(const char *fname)
    1.10 +{
    1.11 +	unsigned int tex;
    1.12 +	struct img_pixmap img;
    1.13 +	int intfmt, fmt, type;
    1.14 +
    1.15 +	img_init(&img);
    1.16 +	if(img_load(&img, fname) == -1) {
    1.17 +		fprintf(stderr, "failed to load texture: %s\n", fname);
    1.18 +		return 0;
    1.19 +	}
    1.20 +	intfmt = img_glintfmt(&img);
    1.21 +	fmt = img_glfmt(&img);
    1.22 +	type = img_gltype(&img);
    1.23 +
    1.24 +	glGenTextures(1, &tex);
    1.25 +	glBindTexture(GL_TEXTURE_2D, tex);
    1.26 +	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    1.27 +	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    1.28 +	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    1.29 +	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    1.30 +	glTexImage2D(GL_TEXTURE_2D, 0, intfmt, img.width, img.height, 0, fmt, type, img.pixels);
    1.31 +	img_destroy(&img);
    1.32 +	return tex;
    1.33 +}
    1.34 +
    1.35 +unsigned int load_texture_cube(const char *fname)
    1.36 +{
    1.37 +	/* TODO implement */
    1.38 +	return 0;
    1.39 +}
    1.40 +
    1.41 +void free_texture(unsigned int tex)
    1.42 +{
    1.43 +	if(tex && glIsTexture(tex)) {
    1.44 +		glDeleteTextures(1, &tex);
    1.45 +	}
    1.46 +}
    1.47 +
    1.48 +void bind_texture(unsigned int tex, int tex_unit)
    1.49 +{
    1.50 +	bind_common(GL_TEXTURE_2D, tex, tex_unit);
    1.51 +}
    1.52 +
    1.53 +void bind_texture_cube(unsigned int tex, int tex_unit)
    1.54 +{
    1.55 +	bind_common(GL_TEXTURE_CUBE_MAP, tex, tex_unit);
    1.56 +}
    1.57 +
    1.58 +static void bind_common(GLenum type, unsigned int tex, int tex_unit)
    1.59 +{
    1.60 +	glActiveTextureARB(GL_TEXTURE0 + (GLenum)tex_unit);
    1.61 +	if(tex) {
    1.62 +		glBindTexture(type, tex);
    1.63 +		glEnable(type);
    1.64 +	} else {
    1.65 +		glDisable(type);
    1.66 +	}
    1.67 +	glActiveTextureARB(GL_TEXTURE0);
    1.68 +}