nuclear@0: #include <stdio.h>
nuclear@0: #include "texture.h"
nuclear@0: #include "image.h"
nuclear@0: #include "opengl.h"
nuclear@0: 
nuclear@0: #ifndef GL_GENERATE_MIPMAP_SGIS
nuclear@0: #define GL_GENERATE_MIPMAP_SGIS 0x8191
nuclear@0: #endif
nuclear@0: 
nuclear@5: static unsigned int default_texture(void);
nuclear@5: 
nuclear@0: unsigned int load_texture(const char *fname)
nuclear@0: {
nuclear@0: 	unsigned int tex;
nuclear@0: 	struct image *img;
nuclear@0: 
nuclear@0: 	if(!(img = load_image(fname))) {
nuclear@0: 		fprintf(stderr, "failed to load image: %s\n", fname);
nuclear@5: 		return default_texture();
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	glGenTextures(1, &tex);
nuclear@0: 	glBindTexture(GL_TEXTURE_2D, tex);
nuclear@0: 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
nuclear@0: 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@0: 	glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
nuclear@0: 	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, img->width, img->height, 0, GL_RGB, GL_UNSIGNED_BYTE, img->pixels);
nuclear@0: 	free_image(img);
nuclear@0: 	return tex;
nuclear@0: }
nuclear@5: 
nuclear@5: #define DEF_TEX_SZ	64
nuclear@5: 
nuclear@5: static unsigned int default_texture(void)
nuclear@5: {
nuclear@5: 	static unsigned int tex;
nuclear@5: 	static unsigned char pixels[DEF_TEX_SZ * DEF_TEX_SZ * 3];
nuclear@5: 
nuclear@5: 	if(!tex) {
nuclear@5: 		/* generate it */
nuclear@5: 		int i, j;
nuclear@5: 		unsigned char *pptr = pixels;
nuclear@5: 
nuclear@5: 		for(i=0; i<DEF_TEX_SZ; i++) {
nuclear@5: 			for(j=0; j<DEF_TEX_SZ; j++) {
nuclear@5: 				int c = ((i >> 3) & 1) == ((j >> 3) & 1);
nuclear@5: 
nuclear@5: 				*pptr++ = c ? 255 : 64;
nuclear@5: 				*pptr++ = 100;
nuclear@5: 				*pptr++ = c ? 64 : 255;
nuclear@5: 			}
nuclear@5: 		}
nuclear@5: 
nuclear@5: 		glGenTextures(1, &tex);
nuclear@5: 		glBindTexture(GL_TEXTURE_2D, tex);
nuclear@5: 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
nuclear@5: 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@5: 		glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
nuclear@5: 		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, DEF_TEX_SZ, DEF_TEX_SZ, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels);
nuclear@5: 	}
nuclear@5: 
nuclear@5: 	return tex;
nuclear@5: }