/*****************************************************************************
* ft2_bitmap.cpp
*****************************************************************************
* Copyright (C) 2003 the VideoLAN team
*
* Authors: Cyril Deguet <asmax@via.ecp.fr>
* Olivier Teulière <ipkiss@via.ecp.fr>
*
* 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 "ft2_bitmap.hpp"
FT2Bitmap::FT2Bitmap( intf_thread_t *pIntf, int width, int height ):
GenericBitmap( pIntf ), m_width( width ), m_height( height )
{
unsigned size;
if (mul_overflow((unsigned)width, (unsigned)height, &size)
|| mul_overflow(size, 4, &size))
throw std::bad_alloc();
// Allocate memory for the buffer
m_pData = new uint8_t[size];
memset(m_pData, 0, size);
}
FT2Bitmap::~FT2Bitmap()
{
delete[] m_pData;
}
void FT2Bitmap::draw( const FT_Bitmap &rBitmap, int left, int top,
uint32_t color )
{
uint8_t *pBuf = rBitmap.buffer;
// Calculate colors
uint8_t blue = color & 0xff;
uint8_t green = (color >> 8) & 0xff;
uint8_t red = (color >> 16) & 0xff;
for( unsigned y = top; y < top + rBitmap.rows && y < m_height; y++ )
{
uint8_t *pData = m_pData + 4 * (m_width * y + left);
for( unsigned x = left; x < left + rBitmap.width && x < m_width; x++ )
{
// The buffer in FT_Bitmap contains alpha values
uint8_t val = *(pBuf++);
*(pData++) = (blue * val) >> 8;
*(pData++) = (green * val) >> 8;
*(pData++) = (red * val) >> 8;
*(pData++) = val;
}
}
}
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