[gtk+] Document new environment variables
- From: Matthias Clasen <matthiasc src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gtk+] Document new environment variables
- Date: Tue, 9 Jul 2013 14:26:11 +0000 (UTC)
commit 2c8ffef284afd4772b0aa38afdaf2f51775d9bb9
Author: Matthias Clasen <mclasen redhat com>
Date: Tue Jul 9 10:07:10 2013 -0400
Document new environment variables
Explain GDK_SCALE and GDK_DPI_SCALE.
docs/reference/gtk/x11.sgml | 25 +++++++++++++++++++++++++
1 files changed, 25 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/gtk/x11.sgml b/docs/reference/gtk/x11.sgml
index bb588b1..5039e8a 100644
--- a/docs/reference/gtk/x11.sgml
+++ b/docs/reference/gtk/x11.sgml
@@ -81,6 +81,31 @@ The X11 GDK backend can be influenced with some additional environment variables
</para>
</formalpara>
+<formalpara>
+ <title><envar>GDK_SCALE</envar></title>
+
+ <para>
+ Must be set to an integer, typically 2. If set, GDK will scale all
+ windows by the specified factor. Scaled output is meant to be used on
+ high-dpi displays. Normally, GDK will pick up a suitable scale factor
+ for each monitor from the display system. This environment variable
+ allows to override that.
+ </para>
+</formalpara>
+
+<formalpara>
+ <title><envar>GDK_DPI_SCALE</envar></title>
+
+ <para>
+ This can be useful when using scale-aware GTK+ applications together
+ with scale-unaware applications on a high-dpi display. In that case,
+ the font resolution can be doubled to make scale-unaware applications
+ readable, and <envar>GDK_DPI_SCALE=0.5</envar> can be set to compensate
+ for that in GTK+ applications which are already scaled by setting
+ <envar>GDK_SCALE=2</envar>.
+ </para>
+</formalpara>
+
</refsect2>
</refsect1>
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