kicad/common/gal/opengl/cached_container_ram.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright 2013-2017 CERN
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* Copyright (C) 2021 KiCad Developers, see AUTHORS.txt for contributors.
*
* @author Maciej Suminski <maciej.suminski@cern.ch>
*
* 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 <gal/opengl/cached_container_ram.h>
#include <gal/opengl/vertex_manager.h>
#include <gal/opengl/vertex_item.h>
#include <gal/opengl/shader.h>
#include <gal/opengl/utils.h>
#include <confirm.h>
#include <list>
#include <cassert>
#include <wx/log.h>
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#ifdef KICAD_GAL_PROFILE
#include <profile.h>
#endif /* KICAD_GAL_PROFILE */
using namespace KIGFX;
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/**
* Flag to enable debug output of the GAL OpenGL cached container.
*
* Use "KICAD_GAL_CACHED_CONTAINER" to enable GAL OpenGL cached container tracing.
*
* @ingroup trace_env_vars
*/
static const wxChar* const traceGalCachedContainer = wxT( "KICAD_GAL_CACHED_CONTAINER" );
CACHED_CONTAINER_RAM::CACHED_CONTAINER_RAM( unsigned int aSize ) :
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CACHED_CONTAINER( aSize ),
m_verticesBuffer( 0 )
{
glGenBuffers( 1, &m_verticesBuffer );
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checkGlError( "generating vertices buffer", __FILE__, __LINE__ );
m_vertices = static_cast<VERTEX*>( malloc( aSize * VERTEX_SIZE ) );
if( !m_vertices )
throw std::bad_alloc();
}
CACHED_CONTAINER_RAM::~CACHED_CONTAINER_RAM()
{
if( glDeleteBuffers )
glDeleteBuffers( 1, &m_verticesBuffer );
free( m_vertices );
}
void CACHED_CONTAINER_RAM::Unmap()
{
if( !m_dirty )
return;
// Upload vertices coordinates and shader types to GPU memory
glBindBuffer( GL_ARRAY_BUFFER, m_verticesBuffer );
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checkGlError( "binding vertices buffer", __FILE__, __LINE__ );
glBufferData( GL_ARRAY_BUFFER, m_maxIndex * VERTEX_SIZE, m_vertices, GL_STREAM_DRAW );
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checkGlError( "transferring vertices", __FILE__, __LINE__ );
glBindBuffer( GL_ARRAY_BUFFER, 0 );
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checkGlError( "unbinding vertices buffer", __FILE__, __LINE__ );
}
bool CACHED_CONTAINER_RAM::defragmentResize( unsigned int aNewSize )
{
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wxLogTrace( traceGalCachedContainer,
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wxT( "Resizing & defragmenting container (memcpy) from %d to %d" ), m_currentSize,
aNewSize );
// No shrinking if we cannot fit all the data
if( usedSpace() > aNewSize )
return false;
#ifdef KICAD_GAL_PROFILE
PROF_COUNTER totalTime;
#endif /* KICAD_GAL_PROFILE */
VERTEX* newBufferMem = static_cast<VERTEX*>( malloc( aNewSize * VERTEX_SIZE ) );
if( !newBufferMem )
throw std::bad_alloc();
defragment( newBufferMem );
// Switch to the new vertex buffer
free( m_vertices );
m_vertices = newBufferMem;
#ifdef KICAD_GAL_PROFILE
totalTime.Stop();
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wxLogTrace( traceGalCachedContainer, "Defragmented container storing %d vertices / %.1f ms",
m_currentSize - m_freeSpace, totalTime.msecs() );
#endif /* KICAD_GAL_PROFILE */
m_freeSpace += ( aNewSize - m_currentSize );
m_currentSize = aNewSize;
// Now there is only one big chunk of free memory
m_freeChunks.clear();
m_freeChunks.insert( std::make_pair( m_freeSpace, m_currentSize - m_freeSpace ) );
m_dirty = true;
return true;
}