+ printf("major version: %d\n", GET_INTEGER(GL_MAJOR_VERSION));
+ printf("minor version: %d\n", GET_INTEGER(GL_MINOR_VERSION));
+ printf("max texture units: %d\n", GET_INTEGER(GL_MAX_TEXTURE_UNITS));
+ printf("max texture image units: %d\n", GET_INTEGER(GL_MAX_TEXTURE_IMAGE_UNITS));
+ printf("max combined texture image units: %d\n", GET_INTEGER(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS));
+ printf("max vertex texture image units: %d\n", GET_INTEGER(GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS));