Blame alleggl-0.4.3-fullscreen-viewport.patch
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diff -up alleggl/src/x.c~ alleggl/src/x.c
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--- alleggl/src/x.c~ 2007-09-18 22:36:28.000000000 +0200
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+++ alleggl/src/x.c 2009-09-10 22:09:01.000000000 +0200
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@@ -1005,6 +1005,14 @@ old_choose_visual:
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#ifdef ALLEGROGL_HAVE_XF86VIDMODE
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if (fullscreen) {
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setattr.override_redirect = True;
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+
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+ /* Warp the pointer to the upper left corner, this is
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+ necessary as the: XF86VidModeSetViewPort() call below does
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+ not seem to do anything on newer Xorg servers, instead the
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+ viewport is always be centered at the last mouse position */
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+ XWarpPointer(_xwin.display, None,
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+ XDefaultRootWindow(_xwin.display),
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+ 0, 0, 0, 0, 0, 0);
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if (!XF86VidModeSwitchToMode(_xwin.display, _xwin.screen,
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_xwin.modesinfo[bestmode])) {
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