vcl/source/opengl/OpenGLHelper.cxx | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
New commits:
commit 5de8f1559afafe4a5430142c305549223d467606
Author: Tomaž Vajngerl <tomaz.vajng...@collabora.co.uk>
Date: Fri Jul 3 14:38:24 2015 +0900
tdf#88831 fix inverted textures when OpenGL is enabled
GLX returns a wrong value if the y coords are inverted. Most other
programs don't even ask for this (gnome-shell for example) and just
assumes "true" (and this works because most relevant X servers work
like this). We make this more robust and assume true only if the
returned value is GLX_DONT_CARE (-1).
Change-Id: I4800b3364fd00f5f4a8f5a459472bfa8d97827ba
Reviewed-on: https://gerrit.libreoffice.org/16860
Reviewed-by: Caolán McNamara <caol...@redhat.com>
Tested-by: Caolán McNamara <caol...@redhat.com>
diff --git a/vcl/source/opengl/OpenGLHelper.cxx
b/vcl/source/opengl/OpenGLHelper.cxx
index 3acb0c6..41881da 100644
--- a/vcl/source/opengl/OpenGLHelper.cxx
+++ b/vcl/source/opengl/OpenGLHelper.cxx
@@ -539,7 +539,11 @@ GLXFBConfig OpenGLHelper::GetPixmapFBConfig( Display*
pDisplay, bool& bInverted
}
glXGetFBConfigAttrib( pDisplay, aFbConfigs[i], GLX_Y_INVERTED_EXT,
&nValue );
- bInverted = nValue == True;
+
+ // Looks like that X sends GLX_DONT_CARE but this usually means "true"
for most
+ // of the X implementations. Investigation on internet pointed that
this could be
+ // safely "true" all the time (for example gnome-shell always assumes
"true").
+ bInverted = nValue == True || nValue == int(GLX_DONT_CARE);
break;
}
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