271 lines
8.2 KiB
C++
271 lines
8.2 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 2013-2017 CERN
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* Copyright (C) 2020 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* @author Maciej Suminski <maciej.suminski@cern.ch>
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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-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 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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#include <gal/opengl/cached_container_gpu.h>
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#include <gal/opengl/vertex_manager.h>
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#include <gal/opengl/vertex_item.h>
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#include <gal/opengl/shader.h>
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#include <gal/opengl/utils.h>
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#include <list>
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#ifdef __WXDEBUG__
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#include <wx/log.h>
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#include <profile.h>
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#endif /* __WXDEBUG__ */
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using namespace KIGFX;
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CACHED_CONTAINER_GPU::CACHED_CONTAINER_GPU( unsigned int aSize ) :
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CACHED_CONTAINER( aSize ), m_isMapped( false ), m_glBufferHandle( -1 )
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{
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m_useCopyBuffer = GLEW_ARB_copy_buffer;
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wxString vendor( glGetString(GL_VENDOR) );
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// workaround for intel GPU drivers: disable glCopyBuffer, causes crashes/freezes on
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// certain driver versions
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if( vendor.Contains ( "Intel " ) || vendor.Contains ( "etnaviv" ) )
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{
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m_useCopyBuffer = false;
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}
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glGenBuffers( 1, &m_glBufferHandle );
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glBindBuffer( GL_ARRAY_BUFFER, m_glBufferHandle );
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glBufferData( GL_ARRAY_BUFFER, m_currentSize * VERTEX_SIZE, NULL, GL_DYNAMIC_DRAW );
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glBindBuffer( GL_ARRAY_BUFFER, 0 );
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checkGlError( "allocating video memory for cached container" );
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}
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CACHED_CONTAINER_GPU::~CACHED_CONTAINER_GPU()
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{
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if( m_isMapped )
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Unmap();
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if( glDeleteBuffers )
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glDeleteBuffers( 1, &m_glBufferHandle );
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}
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void CACHED_CONTAINER_GPU::Map()
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{
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wxCHECK( !IsMapped(), /*void*/ );
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// OpenGL version might suddenly stop being available in Windows when an RDP session is started
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if( !glBindBuffer )
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throw std::runtime_error( "OpenGL no longer available!" );
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glBindBuffer( GL_ARRAY_BUFFER, m_glBufferHandle );
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m_vertices = static_cast<VERTEX*>( glMapBuffer( GL_ARRAY_BUFFER, GL_READ_WRITE ) );
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if( checkGlError( "mapping vertices buffer" ) == GL_NO_ERROR )
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m_isMapped = true;
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}
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void CACHED_CONTAINER_GPU::Unmap()
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{
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wxCHECK( IsMapped(), /*void*/ );
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glUnmapBuffer( GL_ARRAY_BUFFER );
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checkGlError( "unmapping vertices buffer" );
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glBindBuffer( GL_ARRAY_BUFFER, 0 );
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m_vertices = NULL;
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checkGlError( "unbinding vertices buffer" );
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m_isMapped = false;
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}
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bool CACHED_CONTAINER_GPU::defragmentResize( unsigned int aNewSize )
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{
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if( !m_useCopyBuffer )
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return defragmentResizeMemcpy( aNewSize );
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wxCHECK( IsMapped(), false );
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wxLogTrace( "GAL_CACHED_CONTAINER_GPU",
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wxT( "Resizing & defragmenting container from %d to %d" ), m_currentSize, aNewSize );
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// No shrinking if we cannot fit all the data
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if( usedSpace() > aNewSize )
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return false;
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#ifdef __WXDEBUG__
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PROF_COUNTER totalTime;
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#endif /* __WXDEBUG__ */
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GLuint newBuffer;
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// glCopyBufferSubData requires a buffer to be unmapped
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glUnmapBuffer( GL_ARRAY_BUFFER );
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// Create a new destination buffer
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glGenBuffers( 1, &newBuffer );
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// It would be best to use GL_COPY_WRITE_BUFFER here,
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// but it is not available everywhere
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#ifdef __WXDEBUG__
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GLint eaBuffer = -1;
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glGetIntegerv( GL_ELEMENT_ARRAY_BUFFER_BINDING, &eaBuffer );
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wxASSERT( eaBuffer == 0 );
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#endif /* __WXDEBUG__ */
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glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, newBuffer );
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glBufferData( GL_ELEMENT_ARRAY_BUFFER, aNewSize * VERTEX_SIZE, NULL, GL_DYNAMIC_DRAW );
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checkGlError( "creating buffer during defragmentation" );
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ITEMS::iterator it, it_end;
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int newOffset = 0;
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// Defragmentation
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for( it = m_items.begin(), it_end = m_items.end(); it != it_end; ++it )
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{
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VERTEX_ITEM* item = *it;
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int itemOffset = item->GetOffset();
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int itemSize = item->GetSize();
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// Move an item to the new container
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glCopyBufferSubData( GL_ARRAY_BUFFER, GL_ELEMENT_ARRAY_BUFFER,
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itemOffset * VERTEX_SIZE, newOffset * VERTEX_SIZE, itemSize * VERTEX_SIZE );
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// Update new offset
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item->setOffset( newOffset );
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// Move to the next free space
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newOffset += itemSize;
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}
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// Move the current item and place it at the end
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if( m_item->GetSize() > 0 )
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{
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glCopyBufferSubData( GL_ARRAY_BUFFER, GL_ELEMENT_ARRAY_BUFFER,
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m_item->GetOffset() * VERTEX_SIZE, newOffset * VERTEX_SIZE,
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m_item->GetSize() * VERTEX_SIZE );
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m_item->setOffset( newOffset );
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m_chunkOffset = newOffset;
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}
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// Cleanup
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glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, 0 );
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glBindBuffer( GL_ARRAY_BUFFER, 0 );
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// Previously we have unmapped the array buffer, now when it is also
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// unbound, it may be officially marked as unmapped
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m_isMapped = false;
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glDeleteBuffers( 1, &m_glBufferHandle );
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// Switch to the new vertex buffer
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m_glBufferHandle = newBuffer;
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Map();
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checkGlError( "switching buffers during defragmentation" );
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#ifdef __WXDEBUG__
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totalTime.Stop();
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wxLogTrace( "GAL_CACHED_CONTAINER_GPU",
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"Defragmented container storing %d vertices / %.1f ms",
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m_currentSize - m_freeSpace, totalTime.msecs() );
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#endif /* __WXDEBUG__ */
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m_freeSpace += ( aNewSize - m_currentSize );
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m_currentSize = aNewSize;
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// Now there is only one big chunk of free memory
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m_freeChunks.clear();
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m_freeChunks.insert( std::make_pair( m_freeSpace, m_currentSize - m_freeSpace ) );
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return true;
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}
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bool CACHED_CONTAINER_GPU::defragmentResizeMemcpy( unsigned int aNewSize )
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{
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wxCHECK( IsMapped(), false );
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wxLogTrace( "GAL_CACHED_CONTAINER_GPU",
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wxT( "Resizing & defragmenting container (memcpy) from %d to %d" ),
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m_currentSize, aNewSize );
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// No shrinking if we cannot fit all the data
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if( usedSpace() > aNewSize )
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return false;
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#ifdef __WXDEBUG__
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PROF_COUNTER totalTime;
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#endif /* __WXDEBUG__ */
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GLuint newBuffer;
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VERTEX* newBufferMem;
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// Create the destination buffer
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glGenBuffers( 1, &newBuffer );
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// It would be best to use GL_COPY_WRITE_BUFFER here,
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// but it is not available everywhere
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#ifdef __WXDEBUG__
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GLint eaBuffer = -1;
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glGetIntegerv( GL_ELEMENT_ARRAY_BUFFER_BINDING, &eaBuffer );
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wxASSERT( eaBuffer == 0 );
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#endif /* __WXDEBUG__ */
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glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, newBuffer );
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glBufferData( GL_ELEMENT_ARRAY_BUFFER, aNewSize * VERTEX_SIZE, NULL, GL_DYNAMIC_DRAW );
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newBufferMem = static_cast<VERTEX*>( glMapBuffer( GL_ELEMENT_ARRAY_BUFFER, GL_WRITE_ONLY ) );
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checkGlError( "creating buffer during defragmentation" );
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defragment( newBufferMem );
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// Cleanup
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glUnmapBuffer( GL_ELEMENT_ARRAY_BUFFER );
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glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, 0 );
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Unmap();
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glDeleteBuffers( 1, &m_glBufferHandle );
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// Switch to the new vertex buffer
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m_glBufferHandle = newBuffer;
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Map();
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checkGlError( "switching buffers during defragmentation" );
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#ifdef __WXDEBUG__
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totalTime.Stop();
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wxLogTrace( "GAL_CACHED_CONTAINER_GPU",
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"Defragmented container storing %d vertices / %.1f ms",
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m_currentSize - m_freeSpace, totalTime.msecs() );
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#endif /* __WXDEBUG__ */
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m_freeSpace += ( aNewSize - m_currentSize );
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m_currentSize = aNewSize;
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// Now there is only one big chunk of free memory
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m_freeChunks.clear();
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m_freeChunks.insert( std::make_pair( m_freeSpace, m_currentSize - m_freeSpace ) );
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return true;
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}
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