bool CMap::scrollUp(const bool force)
{
if( !force && findHorizontalScrollBlocker((m_scrolly-1)<<STC) )
return false;
const int squareSize = gVideoDriver.getScrollSurface()->w;
if( m_scrolly > 32 )
{
m_scrolly--;
gVideoDriver.mpVideoEngine->UpdateScrollBufY(m_scrolly, squareSize-1);
if (m_scrollpixy==0)
{ // need to draw a new stripe
if(m_mapy>0) m_mapy--;
if (m_mapystripepos == 0)
{
m_mapystripepos = (squareSize - 16);
}
else
{
m_mapystripepos -= 16;
}
drawHstripe(m_mapystripepos, m_mapy);
m_scrollpixy = 15;
} else m_scrollpixy--;
refreshVisibleArea();
return true;
}
return false;
}
bool CMap::scrollUp(const bool force)
{
if( !force && findScrollHorizontalScrollBlocker(m_scrolly<<STC) )
return false;
if( m_scrolly > 32 )
{
m_scrolly--;
m_scrolly_buf = m_scrolly&511;
if (m_scrollpixy==0)
{ // need to draw a new stripe
if(m_mapy>0) m_mapy--;
if (m_mapystripepos == 0)
{
m_mapystripepos = (512 - 16);
}
else
{
m_mapystripepos -= 16;
}
drawHstripe(m_mapystripepos, m_mapy);
m_scrollpixy = 15;
} else m_scrollpixy--;
}
return true;
}
bool CMap::scrollDown(const bool force)
{
const int res_height = gVideoDriver.getGameResolution().h;
if( !force && findHorizontalScrollBlocker((m_scrolly+res_height)<<STC) )
return false;
const int squareSize = gVideoDriver.getScrollSurface()->w;
if(m_scrolly < ((m_height-2)<<4) - res_height )
{
m_scrolly++;
gVideoDriver.mpVideoEngine->UpdateScrollBufY(m_scrolly, squareSize-1);
m_scrollpixy++;
if (m_scrollpixy>=16)
{ // need to draw a new stripe
const int totalNumTiles = squareSize/16;
drawHstripe(m_mapystripepos, m_mapy + totalNumTiles);
m_mapy++;
m_mapystripepos += 16;
if (m_mapystripepos >= squareSize) m_mapystripepos = 0;
m_scrollpixy = 0;
}
refreshVisibleArea();
return true;
}
return false;
}
bool CMap::scrollDown(const bool force)
{
const int res_height = g_pVideoDriver->getGameResolution().h;
if( !force && findScrollHorizontalScrollBlocker((m_scrolly+res_height)<<STC) )
return false;
if(m_scrolly < ((m_height-2)<<4) - res_height )
{
m_scrolly++;
m_scrolly_buf = m_scrolly&511;
m_scrollpixy++;
if (m_scrollpixy>=16)
{ // need to draw a new stripe
drawHstripe(m_mapystripepos, m_mapy + 32);
m_mapy++;
m_mapystripepos += 16;
if (m_mapystripepos >= 512) m_mapystripepos = 0;
m_scrollpixy = 0;
}
}
return true;
}