gl_context_mgr.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2016 CERN
 * Copyright (C) 2017-2021 KiCad Developers, see AUTHORS.txt for contributors.
 * @author Maciej Suminski <[email protected]>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */
 
#include <gl_context_mgr.h>
#include <wx/debug.h>
 
 
GL_CONTEXT_MANAGER& GL_CONTEXT_MANAGER::Get()
{
 static GL_CONTEXT_MANAGER instance;
 
 return instance;
}
 
 
wxGLContext* GL_CONTEXT_MANAGER::CreateCtx( wxGLCanvas* aCanvas, const wxGLContext* aOther )
{
 wxGLContext* context = new wxGLContext( aCanvas, aOther );
 wxCHECK( context, nullptr );
 
#if wxCHECK_VERSION( 3, 1, 0 )
 if( !context->IsOK() )
 {
 delete context;
 return nullptr;
 }
#endif /* wxCHECK_VERSION( 3, 1, 0 ) */
 
 m_glContexts.insert( std::make_pair( context, aCanvas ) );
 
 return context;
}
 
 
void GL_CONTEXT_MANAGER::DestroyCtx( wxGLContext* aContext )
{
 if( m_glContexts.count( aContext ) )
 {
 m_glContexts.erase( aContext );
 delete aContext;
 }
 else
 {
 // Do not delete unknown GL contexts
 wxFAIL;
 }
 
 if( m_glCtx == aContext )
 m_glCtx = nullptr;
}
 
 
void GL_CONTEXT_MANAGER::DeleteAll()
{
 m_glCtxMutex.lock();
 
 for( auto& ctx : m_glContexts )
 delete ctx.first;
 
 m_glContexts.clear();
 m_glCtx = nullptr;
 m_glCtxMutex.unlock();
}
 
 
void GL_CONTEXT_MANAGER::LockCtx( wxGLContext* aContext, wxGLCanvas* aCanvas )
{
 wxCHECK( aCanvas || m_glContexts.count( aContext ) > 0, /* void */ );
 
 m_glCtxMutex.lock();
 wxGLCanvas* canvas = aCanvas ? aCanvas : m_glContexts.at( aContext );
 
 // Prevent assertion failure in wxGLContext::SetCurrent during GAL teardown
#ifdef __WXGTK__
 if( canvas->GetXWindow() )
#endif
 {
 canvas->SetCurrent( *aContext );
 }
 
 m_glCtx = aContext;
}
 
 
void GL_CONTEXT_MANAGER::UnlockCtx( wxGLContext* aContext )
{
 wxCHECK( m_glContexts.count( aContext ) > 0, /* void */ );
 
 if( m_glCtx == aContext )
 {
 m_glCtxMutex.unlock();
 m_glCtx = nullptr;
 }
 else
 {
 wxFAIL_MSG( wxString::Format( wxS( "Trying to unlock GL context mutex from "
 "a wrong context: aContext %p m_glCtx %p" ), aContext, m_glCtx ) );
 }
}
 
 
GL_CONTEXT_MANAGER::GL_CONTEXT_MANAGER()
 : m_glCtx( nullptr )
{
}