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//=============================================================================
//
// File : kvi_doublebuffer.cpp
// Created on Fri 27 Jan 2006 18:59:54 by Szymon Stefanek
//
// This file is part of the KVIrc IRC Client distribution
// Copyright (C) 2006 Szymon Stefanek <pragma at kvirc dot net>
//
// 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 opinion) 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, write to the Free Software Foundation,
// Inc. ,51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
//=============================================================================
#define __KVILIB__
#include "kvi_doublebuffer.h"
static TQPixmap * g_pMemoryPixmap = 0;
static unsigned int g_uMaxRequestedWidth = 0;
static unsigned int g_uMaxRequestedHeight = 0;
KviDoubleBuffer::KviDoubleBuffer(unsigned int uWidth,unsigned int uHeight)
{
if((g_pMemoryPixmap->width() < uWidth) || (g_pMemoryPixmap->height() < uHeight))
{
// The memory buffer is too small
// There is either no such user requirement or it has grown by the meantime
unsigned int uMaxW = uWidth > g_pMemoryPixmap->width() ? uWidth : g_pMemoryPixmap->width();
unsigned int uMaxH = uHeight > g_pMemoryPixmap->height() ? uHeight : g_pMemoryPixmap->height();
g_pMemoryPixmap->resize(uMaxW,uMaxH);
}
if(uWidth > g_uMaxRequestedWidth)g_uMaxRequestedWidth = uWidth;
if(uHeight > g_uMaxRequestedHeight)g_uMaxRequestedHeight = uHeight;
}
KviDoubleBuffer::~KviDoubleBuffer()
{
// We never shrink here (it's time consuming)
}
TQPixmap * KviDoubleBuffer::pixmap()
{
return g_pMemoryPixmap;
}
void KviDoubleBuffer::init()
{
if(g_pMemoryPixmap)return;
g_pMemoryPixmap = new TQPixmap();
}
void KviDoubleBuffer::done()
{
if(!g_pMemoryPixmap)return;
delete g_pMemoryPixmap;
g_pMemoryPixmap = 0;
}
void KviDoubleBuffer::heartbeat()
{
if(((g_uMaxRequestedHeight + 64) < g_pMemoryPixmap->height()) || ((g_uMaxRequestedWidth + 64) < g_pMemoryPixmap->width()))
{
// do shrink :)
g_pMemoryPixmap->resize(g_uMaxRequestedWidth,g_uMaxRequestedHeight);
}
g_uMaxRequestedHeight = 0;
g_uMaxRequestedWidth = 0;
}
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