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/*
* Copyright (c) 2002 Patrick Julien <freak@codepimps.org>
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <assert.h>
#include <kdebug.h>
#include "kis_tile_global.h"
#include "kis_tile.h"
#include "kis_tileddatamanager.h"
#include "kis_tilemanager.h"
const TQ_INT32 KisTile::WIDTH = 64;
const TQ_INT32 KisTile::HEIGHT = 64;
KisTile::KisTile(TQ_INT32 pixelSize, TQ_INT32 col, TQ_INT32 row, const TQ_UINT8 *defPixel)
{
m_pixelSize = pixelSize;
m_data = 0;
m_nextTile = 0;
m_col = col;
m_row = row;
m_nReadlock = 0;
allocate();
KisTileManager::instance()->registerTile(this);
setData(defPixel);
}
KisTile::KisTile(const KisTile& rhs, TQ_INT32 col, TQ_INT32 row)
{
if (this != &rhs) {
m_pixelSize = rhs.m_pixelSize;
m_data = 0;
m_nextTile = 0;
m_nReadlock = 0;
allocate();
// Assure we have data to copy
rhs.addReader();
memcpy(m_data, rhs.m_data, WIDTH * HEIGHT * m_pixelSize * sizeof(TQ_UINT8));
rhs.removeReader();
m_col = col;
m_row = row;
KisTileManager::instance()->registerTile(this);
}
}
KisTile::KisTile(const KisTile& rhs)
{
if (this != &rhs) {
m_pixelSize = rhs.m_pixelSize;
m_col = rhs.m_col;
m_row = rhs.m_row;
m_data = 0;
m_nextTile = 0;
m_nReadlock = 0;
allocate();
rhs.addReader();
memcpy(m_data, rhs.m_data, WIDTH * HEIGHT * m_pixelSize * sizeof(TQ_UINT8));
rhs.removeReader();
KisTileManager::instance()->registerTile(this);
}
}
KisTile::~KisTile()
{
KisTileManager::instance()->deregisterTile(this); // goes before the deleting of m_data!
if (m_data) {
// delete[] m_data;
KisTileManager::instance()->dontNeedTileData(m_data, m_pixelSize);
m_data = 0;
}
assert( !readers() );
}
void KisTile::allocate()
{
if (m_data == 0) {
assert (!readers());
m_data = KisTileManager::instance()->requestTileData(m_pixelSize);
TQ_CHECK_PTR(m_data);
}
}
void KisTile::setNext(KisTile *n)
{
m_nextTile = n;
}
TQ_UINT8 *KisTile::data(TQ_INT32 x, TQ_INT32 y ) const
{
addReader();
removeReader();
Q_ASSERT(m_data != 0);
if (m_data == 0) return 0;
return m_data + m_pixelSize * ( y * WIDTH + x );
}
void KisTile::setData(const TQ_UINT8 *pixel)
{
addReader();
TQ_UINT8 *dst = m_data;
for(int i=0; i <WIDTH * HEIGHT;i++)
{
memcpy(dst, pixel, m_pixelSize);
dst+=m_pixelSize;
}
removeReader();
}
void KisTile::addReader() const
{
if (m_nReadlock++ == 0)
KisTileManager::instance()->ensureTileLoaded(this);
else if (m_nReadlock < 0) {
kdDebug(41000) << m_nReadlock << endl;
assert(0);
}
assert(m_data);
}
void KisTile::removeReader() const
{
if (--m_nReadlock == 0)
KisTileManager::instance()->maySwapTile(this);
}
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