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| author | Tomaž Vajngerl <tomaz.vajngerl@collabora.co.uk> | 2015-07-03 14:38:24 +0900 |
|---|---|---|
| committer | Tomaž Vajngerl <tomaz.vajngerl@collabora.co.uk> | 2015-07-03 14:52:28 +0900 |
| commit | f7f0486376adbabf3ea66bfd8a7b692c335ec3c8 (patch) | |
| tree | f601d7f1663fb266f8c266de4d6a92b05d9289a5 /vcl | |
| parent | 149e62670ed01f33612e841c8d17b6bd416e2d88 (diff) | |
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
Diffstat (limited to 'vcl')
| -rw-r--r-- | vcl/source/opengl/OpenGLHelper.cxx | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/vcl/source/opengl/OpenGLHelper.cxx b/vcl/source/opengl/OpenGLHelper.cxx index 5663ccb3cb94..3ed6bdd1d637 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; } |