glBindTexture( GL_TEXTURE_2D, a->id );
glTexImage2D( GL_TEXTURE_2D, 0, a->internalformat, rx, ry,
0, a->format, a->type, NULL );
glBindTexture( GL_TEXTURE_2D, a->id );
glTexImage2D( GL_TEXTURE_2D, 0, a->internalformat, rx, ry,
0, a->format, a->type, NULL );