nuclear@3: #include <imago2.h>
nuclear@3: #include "opengl.h"
nuclear@3: 
nuclear@3: static void bind_common(GLenum type, unsigned int tex, int tex_unit);
nuclear@3: 
nuclear@3: unsigned int load_texture(const char *fname)
nuclear@3: {
nuclear@3: 	unsigned int tex;
nuclear@3: 	struct img_pixmap img;
nuclear@3: 	int intfmt, fmt, type;
nuclear@3: 
nuclear@3: 	img_init(&img);
nuclear@3: 	if(img_load(&img, fname) == -1) {
nuclear@3: 		fprintf(stderr, "failed to load texture: %s\n", fname);
nuclear@3: 		return 0;
nuclear@3: 	}
nuclear@3: 	intfmt = img_glintfmt(&img);
nuclear@3: 	fmt = img_glfmt(&img);
nuclear@3: 	type = img_gltype(&img);
nuclear@3: 
nuclear@3: 	glGenTextures(1, &tex);
nuclear@3: 	glBindTexture(GL_TEXTURE_2D, tex);
nuclear@3: 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@3: 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@3: 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
nuclear@3: 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
nuclear@3: 	glTexImage2D(GL_TEXTURE_2D, 0, intfmt, img.width, img.height, 0, fmt, type, img.pixels);
nuclear@3: 	img_destroy(&img);
nuclear@3: 	return tex;
nuclear@3: }
nuclear@3: 
nuclear@3: unsigned int load_texture_cube(const char *fname)
nuclear@3: {
nuclear@3: 	/* TODO implement */
nuclear@3: 	return 0;
nuclear@3: }
nuclear@3: 
nuclear@3: void free_texture(unsigned int tex)
nuclear@3: {
nuclear@3: 	if(tex && glIsTexture(tex)) {
nuclear@3: 		glDeleteTextures(1, &tex);
nuclear@3: 	}
nuclear@3: }
nuclear@3: 
nuclear@3: void bind_texture(unsigned int tex, int tex_unit)
nuclear@3: {
nuclear@3: 	bind_common(GL_TEXTURE_2D, tex, tex_unit);
nuclear@3: }
nuclear@3: 
nuclear@3: void bind_texture_cube(unsigned int tex, int tex_unit)
nuclear@3: {
nuclear@3: 	bind_common(GL_TEXTURE_CUBE_MAP, tex, tex_unit);
nuclear@3: }
nuclear@3: 
nuclear@3: static void bind_common(GLenum type, unsigned int tex, int tex_unit)
nuclear@3: {
nuclear@3: 	glActiveTextureARB(GL_TEXTURE0 + (GLenum)tex_unit);
nuclear@3: 	if(tex) {
nuclear@3: 		glBindTexture(type, tex);
nuclear@3: 		glEnable(type);
nuclear@3: 	} else {
nuclear@3: 		glDisable(type);
nuclear@3: 	}
nuclear@3: 	glActiveTextureARB(GL_TEXTURE0);
nuclear@3: }