add a translation utility to grail

By calling the grail_set_bbox(), grail will do translation of api
coordinates and matching properties to an external coordinate system,
such as screen coordinates.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/grail.h b/include/grail.h
index 241800e..c77a6e3 100644
--- a/include/grail.h
+++ b/include/grail.h
@@ -86,6 +86,10 @@ int grail_idle(struct grail *ge, int fd, int ms);
 int grail_pull(struct grail *ge, int fd);
 void grail_close(struct grail *ge, int fd);
 
+void grail_set_bbox(struct grail *ge,
+                    const struct grail_coord *min,
+                    const struct grail_coord *max);
+
 void grail_get_units(const struct grail *ge,
                      struct grail_coord *min, struct grail_coord *max);