mirror of
https://gitlab.com/kicad/code/kicad.git
synced 2025-09-14 18:23:15 +02:00
3a730361d3
Checking for the existence of the call only validated that our header defined the value, not that the video card/driver supported the call. We query the extensions string directly to check for support. This should fix both the X11 and virtualization issues (potentially other crashes with older video cards as well) Fixes https://gitlab.com/kicad/code/kicad/issues/8944 (cherry picked from commit 7c9340f85516a34e0ba5d98daef5d40accb5c15f)
111 lines
3.3 KiB
C++
111 lines
3.3 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2020 Kicad Developers, see AUTHORS.txt for contributors
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-3.0.html
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* or you may search the http://www.gnu.org website for the version 3 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef GL_UTILS_H
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#define GL_UTILS_H
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#include <gal/opengl/kiglew.h> // Must be included first
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#include <wx/glcanvas.h>
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#include <wx/utils.h>
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#include <limits>
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class GL_UTILS
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{
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public:
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/**
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* Attempts to set the OpenGL swap interval.
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*
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* @param aVal if -1 = try to set adaptive swapping, 0 = sync off, 1 = sync with VSYNC rate.
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* @return actual value set
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*/
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static int SetSwapInterval( int aVal )
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{
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/// This routine is written for Linux using X11 only. The equivalent functions under
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/// Windows would include <wglext.h> and call wglSwapIntervalEXT
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#if defined( __linux__ ) && !defined( KICAD_USE_EGL )
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Display *dpy = glXGetCurrentDisplay();
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GLXDrawable drawable = glXGetCurrentDrawable();
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if( glXSwapIntervalEXT && glXQueryDrawable && dpy && drawable )
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{
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if( aVal < 0 )
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{
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if( !wxGLCanvas::IsExtensionSupported( "GLX_EXT_swap_control_tear" ) )
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{
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aVal = 0;
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}
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else
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{
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// Even though the extensions might be available,
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// we need to be sure that late/adaptive swaps are
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// enabled on the drawable.
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unsigned lateSwapsEnabled;
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glXQueryDrawable( dpy, drawable, GLX_LATE_SWAPS_TEAR_EXT, &lateSwapsEnabled );
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if( !lateSwapsEnabled )
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{
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aVal = 0;
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}
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}
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}
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unsigned clampedInterval;
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glXSwapIntervalEXT( dpy, drawable, aVal );
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glXQueryDrawable( dpy, drawable, GLX_SWAP_INTERVAL_EXT, &clampedInterval );
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return clampedInterval;
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}
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if( glXSwapIntervalMESA &&glXGetSwapIntervalMESA )
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{
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if( aVal < 0 )
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aVal = 0;
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glXSwapIntervalMESA( aVal );
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return glXGetSwapIntervalMESA();
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}
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if( glXSwapIntervalSGI )
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{
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if( aVal < 1 )
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aVal = 1;
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if( glXSwapIntervalSGI( aVal ) )
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glXSwapIntervalSGI( 1 );
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return 1;
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}
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return std::numeric_limits<int>::max();
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#else
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return 0;
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#endif
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}
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};
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#endif /* GL_CONTEXT_MANAGER_H */
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