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91 lines
3.0 KiB
91 lines
3.0 KiB
//=============================================================================
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//
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// File : kvi_doublebuffer.cpp
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// Created on Fri 27 Jan 2006 18:59:54 by Szymon Stefanek
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//
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// This file is part of the KVIrc IRC Client distribution
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// Copyright (C) 2006 Szymon Stefanek <pragma at kvirc dot net>
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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 opinion) 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.
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// See the 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, write to the Free Software Foundation,
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// Inc. ,51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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//=============================================================================
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#define __KVILIB__
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#include "kvi_doublebuffer.h"
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static TQPixmap * g_pMemoryPixmap = 0;
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static unsigned int g_uMaxRequestedWidth = 0;
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static unsigned int g_uMaxRequestedHeight = 0;
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KviDoubleBuffer::KviDoubleBuffer(unsigned int uWidth,unsigned int uHeight)
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{
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if((g_pMemoryPixmap->width() < uWidth) || (g_pMemoryPixmap->height() < uHeight))
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{
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// The memory buffer is too small
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// There is either no such user requirement or it has grown by the meantime
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unsigned int uMaxW = uWidth > g_pMemoryPixmap->width() ? uWidth : g_pMemoryPixmap->width();
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unsigned int uMaxH = uHeight > g_pMemoryPixmap->height() ? uHeight : g_pMemoryPixmap->height();
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#ifdef COMPILE_USE_QT4
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// QT4SUX: TQPixmap::resize() is missing (it's a widely used function and assigning a new TQPixmap() seems to be slower and not intuitive)
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*g_pMemoryPixmap = TQPixmap(uMaxW,uMaxH);
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#else
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g_pMemoryPixmap->resize(uMaxW,uMaxH);
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#endif
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}
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if(uWidth > g_uMaxRequestedWidth)g_uMaxRequestedWidth = uWidth;
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if(uHeight > g_uMaxRequestedHeight)g_uMaxRequestedHeight = uHeight;
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}
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KviDoubleBuffer::~KviDoubleBuffer()
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{
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// We never shrink here (it's time consuming)
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}
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TQPixmap * KviDoubleBuffer::pixmap()
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{
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return g_pMemoryPixmap;
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}
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void KviDoubleBuffer::init()
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{
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if(g_pMemoryPixmap)return;
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g_pMemoryPixmap = new TQPixmap();
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}
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void KviDoubleBuffer::done()
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{
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if(!g_pMemoryPixmap)return;
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delete g_pMemoryPixmap;
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g_pMemoryPixmap = 0;
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}
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void KviDoubleBuffer::heartbeat()
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{
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if(((g_uMaxRequestedHeight + 64) < g_pMemoryPixmap->height()) || ((g_uMaxRequestedWidth + 64) < g_pMemoryPixmap->width()))
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{
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// do shrink :)
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#ifdef COMPILE_USE_QT4
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// QT4SUX: TQPixmap::resize() is missing (it's a widely used function and assigning a new TQPixmap() seems to be slower and not intuitive)
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*g_pMemoryPixmap = TQPixmap(g_uMaxRequestedWidth,g_uMaxRequestedHeight);
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#else
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g_pMemoryPixmap->resize(g_uMaxRequestedWidth,g_uMaxRequestedHeight);
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#endif
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}
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g_uMaxRequestedHeight = 0;
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g_uMaxRequestedWidth = 0;
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}
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