Mise a jour du texte sur l'option usedamage pour tenir compte de l'ajout du choix de l'optimisations (1 ou 2)

1 files changed, 10 insertions, 5 deletions

diff --git a/doc/refman.tex b/doc/refman.tex
index 109b719..07e7032 100644
--- a/doc/refman.tex
+++ b/doc/refman.tex
@@ -850,13 +850,18 @@ actual source of the default color. Its default value is
   Specifies whether to use or not damage optimizations with the openGL
   rendering. Damage are drawable regions which are in need of
   redisplay to repair the effects of window manipulation or to apply
-  data change. The value is a boolean that can have the values 0 or
-  1. The value 0 specifies that no optimization is applied, ie that
-  the whole area of our widget is redisplayed. A value of 1 asks for
-  damage optimization: TkZinc records an update area where the change
+  data change. The value is an integer that can have the values 0, 1 or
+  2. The value 0 specifies that no optimization is applied, ie that
+  the whole area of our widget is redisplayed. A value of 1 or 2 activates
+  OpenGL optimization: TkZinc records an update area where the change
   have been made and then use this area to confine redrawing. It will
   speed up redrawing in most cases but with some graphic cards it may
-  generate visual trails. The default value is {\tt 0}.
+  generate visual trails. A value of 1 is equivalent to the
+  GL_DAMAGE compilation flag in older version of TkZinc: it provides
+  significantly better performance with Nvidia cards but it creates a
+  strange trail effect with other cards (Ati, etc). A value of 2
+  provides optimizations that are a bit slower but have a much better
+  compatibility with Ati or Intel cards. The default value is {\tt 0}.
 \end{blockindent}
 
 \option{xscrollcommand}{xScrollCommand}{ScrollCommand}