int (*bo_write)(struct gbm_bo *bo, const void *buf, size_t data);
int (*bo_get_fd)(struct gbm_bo *bo);
int (*bo_get_planes)(struct gbm_bo *bo);
+ union gbm_bo_handle (*bo_get_handle)(struct gbm_bo *bo, int plane);
void (*bo_destroy)(struct gbm_bo *bo);
struct gbm_surface *(*surface_create)(struct gbm_device *gbm,