README

Mac command line program for converting images to an uncompressed
binary file suitable for using with OpenGL textures.

Here is a sample C++ usage of reading the texture file:

       FILE *fp = fopen(filename, "r");
        unsigned char *texture = new unsigned char[4 * 256 * 256];
        if (fread(texture, sizeof(unsigned char), 4 * 256 * 256, fp)
        != 4* 256 *256) {
            fprintf(stderr, "error reading %s", filename);
        }
        fclose(fp);
        glGenTextures(1, &textureNum);
        glBindTexture(GL_TEXTURE_2D, textureNum);
        
        glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL );        
        glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
                        GL_LINEAR_MIPMAP_NEAREST );
        glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
        GL_LINEAR );        
        glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
                        GL_CLAMP );
        glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
                        GL_CLAMP );
        gluBuild2DMipmaps(GL_TEXTURE_2D, 4, 256, 256, GL_RGBA,
        GL_UNSIGNED_BYTE, texture);
        delete [] texture;