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/*
* This file is part of the KDE project
*
* Copyright (c) 2004 Casper Boemann <cbr@boemann.dk>
*
* 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 <kdebug.h>
#include "kis_tile_global.h"
#include "kis_tilediterator.h"
KisTiledHLineIterator::KisTiledHLineIterator( KisTiledDataManager *ndevice, Q_INT32 x, Q_INT32 y, Q_INT32 w, bool writable) :
KisTiledIterator(ndevice),
m_right(x+w-1), m_left(x)
{
Q_ASSERT(ndevice != 0);
m_writable = writable;
m_x = x;
m_y = y;
// Find tile row,col matching x,y
m_row = yToRow(m_y);
m_leftCol = xToCol(m_x);
m_rightCol = xToCol(m_right);
m_col = m_leftCol;
// calc limits within the tile
m_yInTile = m_y - m_row * KisTile::HEIGHT;
m_leftInTile = m_x - m_leftCol * KisTile::WIDTH;
if(m_col == m_rightCol)
m_rightInTile = m_right - m_rightCol * KisTile::WIDTH;
else
m_rightInTile = KisTile::WIDTH - 1;
m_xInTile = m_leftInTile;
fetchTileData(m_col, m_row);
m_offset = m_pixelSize * (m_yInTile * KisTile::WIDTH + m_xInTile);
}
KisTiledHLineIterator::KisTiledHLineIterator(const KisTiledHLineIterator& rhs)
: KisTiledIterator(rhs)
{
if (this != &rhs) {
m_right = rhs.m_right;
m_left = rhs.m_left;
m_leftCol = rhs.m_leftCol;
m_rightCol = rhs.m_rightCol;
m_xInTile = rhs.m_xInTile;
m_yInTile = rhs.m_yInTile;
m_leftInTile = rhs.m_leftInTile;
m_rightInTile = rhs.m_rightInTile;
}
}
KisTiledHLineIterator& KisTiledHLineIterator::operator=(const KisTiledHLineIterator& rhs)
{
if (this != &rhs) {
KisTiledIterator::operator=(rhs);
m_right = rhs.m_right;
m_left = rhs.m_left;
m_leftCol = rhs.m_leftCol;
m_rightCol = rhs.m_rightCol;
m_xInTile = rhs.m_xInTile;
m_yInTile = rhs.m_yInTile;
m_leftInTile = rhs.m_leftInTile;
m_rightInTile = rhs.m_rightInTile;
}
return *this;
}
KisTiledHLineIterator::~KisTiledHLineIterator( )
{
}
KisTiledHLineIterator & KisTiledHLineIterator::operator ++ ()
{
if(m_xInTile >= m_rightInTile)
{
nextTile();
fetchTileData(m_col, m_row);
m_xInTile =m_leftInTile;
m_offset = m_pixelSize * (m_yInTile * KisTile::WIDTH + m_xInTile);
}
else
{
m_xInTile++;
m_offset += m_pixelSize;
}
m_x++;
return *this;
}
void KisTiledHLineIterator::nextTile()
{
if(m_col < m_rightCol)
{
m_col++;
m_leftInTile = 0;
if(m_col == m_rightCol)
m_rightInTile = m_right - m_rightCol * KisTile::WIDTH;
else
m_rightInTile = KisTile::WIDTH - 1;
}
}
void KisTiledHLineIterator::prevTile()
{
if(m_col > m_leftCol)
{
m_col--;
if(m_col == m_leftCol) {
m_leftInTile = m_left - m_leftCol * KisTile::WIDTH;
} else {
m_leftInTile = 0;
}
// the only place this doesn't apply, is if we're in rightCol, and we can't go there
m_rightInTile = KisTile::WIDTH - 1;
}
}
Q_INT32 KisTiledHLineIterator::nConseqHPixels() const
{
return m_rightInTile - m_xInTile + 1;
}
KisTiledHLineIterator & KisTiledHLineIterator::operator+=(int n)
{
// XXX what if outside the valid range of this iterator?
if(m_xInTile + n > m_rightInTile)
{
m_x += n;
m_col = xToCol(m_x);
m_xInTile = m_x - m_col * KisTile::WIDTH;
m_leftInTile = 0;
if(m_col == m_rightCol)
m_rightInTile = m_right - m_rightCol * KisTile::WIDTH;
else
m_rightInTile = KisTile::WIDTH - 1;
fetchTileData(m_col, m_row);
}
else
{
m_xInTile += n;
m_x += n;
}
m_offset = m_pixelSize * (m_yInTile * KisTile::WIDTH + m_xInTile);
return *this;
}
KisTiledHLineIterator & KisTiledHLineIterator::operator -- ()
{
if(m_xInTile <= 0)
{
prevTile();
fetchTileData(m_col, m_row);
m_xInTile = KisTile::WIDTH - 1;
m_offset = m_pixelSize * (m_yInTile * KisTile::WIDTH + m_xInTile);
}
else
{
m_xInTile--;
m_offset -= m_pixelSize;
}
m_x--;
return *this;
}
void KisTiledHLineIterator::nextRow()
{
m_y++;
m_yInTile++;
m_x = m_left;
m_leftInTile = m_x - m_leftCol * KisTile::WIDTH;
m_xInTile = m_leftInTile;
if( m_yInTile >= KisTile::HEIGHT )
{ // Need a new row
m_yInTile = 0;
m_row++;
m_col = m_leftCol;
fetchTileData(m_col, m_row);
} else if( m_leftCol != m_col ) {
m_col = m_leftCol;
fetchTileData(m_col, m_row);
}
if(m_col == m_rightCol)
m_rightInTile = m_right - m_rightCol * KisTile::WIDTH;
else
m_rightInTile = KisTile::WIDTH - 1;
m_offset = m_pixelSize * (m_yInTile * KisTile::WIDTH + m_xInTile);
}
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