printf("texture units: %d\n", GET_INTEGER(GL_MAX_TEXTURE_UNITS));
printf("max texture size: %d\n", GET_INTEGER(GL_MAX_TEXTURE_SIZE));
printf("max texture coordinates: %d\n", GET_INTEGER(GL_MAX_TEXTURE_COORDS));
+ printf("max vertex attributes: %d\n", GET_INTEGER(GL_MAX_VERTEX_ATTRIBS));
+ printf("max renderbuffer size: %d\n", GET_INTEGER(GL_MAX_RENDERBUFFER_SIZE_EXT));
return 0;
}