Updated and clarified the meaning of -render

1 files changed, 16 insertions, 5 deletions

diff --git a/doc/refman.tex b/doc/refman.tex
index ca12781..ea242d0 100644
--- a/doc/refman.tex
+++ b/doc/refman.tex
@@ -714,10 +714,21 @@ actual source of the default color. Its default value is
 
 \option{render}{render}{Render}
 \begin{blockindent}
-  Specifies whether to use or not the openGL rendering. When True, requires the GLX
-  extension to the X server. Must be defined at widget creation time.  This option is
-  readonly and can be used to ask if the widget is drawing with the GLX extension or
-  in plain X (to adapt the application code for example). The default value is {\tt false}.
+  Specifies whether to use or not the openGL rendering. The value is
+  a positive integer that can have the values 0, 1 and 2. The value 0
+  specifies a X11 rendering while the other two ask for an OpenGL
+  rendering and as such requires the GLX extension to the X server.
+  A value of 1 asks for direct OpenGL rendering which is the faster but
+  is limited to a local session with the display while a value of 2
+  requests an indirect rendering which is slower but can be streamed
+  to a distant display (at least under X11). If a direct rendering
+  mode is requested but can't be achieved the indirect render mode
+  will be tried automatically. If neither OpenGL modes are available
+  the X11 mode is used as a fallback.
+  This option must be defined at widget creation time and is readonly
+  for the rest of the session. It can be used to ask if the widget is
+  drawing in OpenGL mode or in plain X mode (to adapt the
+  application code for example). The default value is {\tt 0}.
 \end{blockindent}
 
 \option{reshape}{reshape}{Reshape}
@@ -2272,7 +2283,7 @@ false.
 
 \zinccmd{hasanchors}{tagOrId}
 
-{\tt\large \$bool = \$zinc->{\bf hasanchor}(tagOrId);}
+{\tt\large \$bool = \$zinc->{\bf hasanchors}(tagOrId);}
 
 \begin{blockindent}
   This command returns a boolean telling if the item specified by {\tt tagOrId} supports