mirror of
https://gitlab.com/kicad/code/kicad.git
synced 2025-09-14 18:23:15 +02:00
be8327bd54
Vertex memory allocation uses malloc and realloc without checking the result. Throw exceptions that can be caught in the DoRepaint() method in EDA_DRAW_PANEL_GAL when malloc and realloc return a null pointer.
103 lines
3.0 KiB
C++
103 lines
3.0 KiB
C++
/*
|
|
* This program source code file is part of KiCad, a free EDA CAD application.
|
|
*
|
|
* Copyright (C) 2013 CERN
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file noncached_container.cpp
|
|
* @brief Class to store instances of VERTEX without caching. It allows a fast one-frame drawing
|
|
* and then clearing the buffer and starting from scratch.
|
|
*/
|
|
|
|
#include <gal/opengl/noncached_container.h>
|
|
#include <cstring>
|
|
#include <cstdlib>
|
|
|
|
using namespace KIGFX;
|
|
|
|
NONCACHED_CONTAINER::NONCACHED_CONTAINER( unsigned int aSize ) :
|
|
VERTEX_CONTAINER( aSize ),
|
|
m_freePtr( 0 )
|
|
{
|
|
m_vertices = static_cast<VERTEX*>( malloc( aSize * sizeof( VERTEX ) ) );
|
|
|
|
// Unfortunately we cannot remove the use of malloc here because realloc is used in
|
|
// the Allocate method below. The new operator behavior is mimicked here so that a
|
|
// malloc failure can be caught in the OpenGL initialization code further up the stack.
|
|
if( !m_vertices )
|
|
throw std::bad_alloc();
|
|
|
|
memset( m_vertices, 0x00, aSize * sizeof( VERTEX ) );
|
|
}
|
|
|
|
|
|
NONCACHED_CONTAINER::~NONCACHED_CONTAINER()
|
|
{
|
|
free( m_vertices );
|
|
}
|
|
|
|
|
|
void NONCACHED_CONTAINER::SetItem( VERTEX_ITEM* aItem )
|
|
{
|
|
// Nothing has to be done, as the noncached container
|
|
// does not care about VERTEX_ITEMs ownership
|
|
}
|
|
|
|
|
|
VERTEX* NONCACHED_CONTAINER::Allocate( unsigned int aSize )
|
|
{
|
|
if( m_freeSpace < aSize )
|
|
{
|
|
// Double the space
|
|
VERTEX* newVertices =
|
|
static_cast<VERTEX*>( realloc( m_vertices, m_currentSize * 2 * sizeof( VERTEX ) ) );
|
|
|
|
if( newVertices != NULL )
|
|
{
|
|
m_vertices = newVertices;
|
|
m_freeSpace += m_currentSize;
|
|
m_currentSize *= 2;
|
|
}
|
|
else
|
|
{
|
|
throw std::bad_alloc();
|
|
}
|
|
}
|
|
|
|
VERTEX* freeVertex = &m_vertices[m_freePtr];
|
|
|
|
// Move to the next free chunk
|
|
m_freePtr += aSize;
|
|
m_freeSpace -= aSize;
|
|
|
|
return freeVertex;
|
|
}
|
|
|
|
|
|
void NONCACHED_CONTAINER::Clear()
|
|
{
|
|
m_freePtr = 0;
|
|
m_freeSpace = m_currentSize;
|
|
}
|