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/*
* Copyright (c) 2005 Boudewijn Rempt <boud@valdyas.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 "kdebug.h"
#include "kis_global.h"
#include "kis_abstract_colorspace.h"
#include "kis_integer_maths.h"
#include "kis_u16_base_colorspace.h"
TQ_UINT8 KisU16BaseColorSpace::getAlpha(const TQ_UINT8 * U8_pixel) const
{
if (m_alphaPos < 0) return OPACITY_OPAQUE;
U8_pixel+= m_alphaPos;
const TQ_UINT16 *pixel = reinterpret_cast<const TQ_UINT16 *>(U8_pixel);
return UINT16_TO_UINT8(*pixel);
}
void KisU16BaseColorSpace::setAlpha(TQ_UINT8 *U8_pixel, TQ_UINT8 alpha, TQ_INT32 nPixels) const
{
if (m_alphaPos < 0) return;
TQ_INT32 psize = pixelSize();
while (nPixels > 0) {
TQ_UINT16 *pixel = reinterpret_cast<TQ_UINT16 *>(U8_pixel + m_alphaPos);
pixel[0] = UINT8_TO_UINT16(alpha);
--nPixels;
U8_pixel += psize;
}
}
void KisU16BaseColorSpace::multiplyAlpha(TQ_UINT8 *U8_pixel, TQ_UINT8 U8_alpha, TQ_INT32 nPixels)
{
if (m_alphaPos < 0) return;
TQ_INT32 psize = pixelSize();
TQ_UINT16 alpha = UINT8_TO_UINT16(U8_alpha);
while (nPixels > 0) {
TQ_UINT16 *pixelAlpha = reinterpret_cast<TQ_UINT16 *>(U8_pixel + m_alphaPos);
*pixelAlpha = UINT16_MULT(*pixelAlpha, alpha);
--nPixels;
U8_pixel += psize;
}
}
void KisU16BaseColorSpace::applyAlphaU8Mask(TQ_UINT8 * U8_pixel, TQ_UINT8 * alpha8, TQ_INT32 nPixels)
{
if (m_alphaPos < 0) return;
TQ_INT32 psize = pixelSize();
while (nPixels--) {
// Go to the alpha position (which is given in bytes from the start of the pixel,
// and cast to short.
TQ_UINT16 *pixelAlpha = reinterpret_cast<TQ_UINT16 *>(U8_pixel + m_alphaPos);
*pixelAlpha = UINT8_MULT(*pixelAlpha, *alpha8);
++alpha8;
U8_pixel += psize;
}
}
void KisU16BaseColorSpace::applyInverseAlphaU8Mask(TQ_UINT8 * U8_pixels, TQ_UINT8 * alpha8, TQ_INT32 nPixels)
{
if (m_alphaPos < 0) return;
TQ_INT32 psize = pixelSize();
while(nPixels--) {
TQ_UINT16 s_alpha8;
TQ_UINT32 p_alpha, s_alpha16;
TQ_UINT16 *alpha = reinterpret_cast<TQ_UINT16 *>(U8_pixels + m_alphaPos);
p_alpha = *(alpha);
s_alpha8 = MAX_SELECTED - *alpha8;
s_alpha16 = UINT8_TO_UINT16(s_alpha8);
// Go to the alpha position (which is given in bytes from the start of the pixel,
// and cast to short.
alpha[0] = UINT16_MULT(p_alpha, s_alpha16);
U8_pixels += psize;
++alpha8;
}
}
TQString KisU16BaseColorSpace::channelValueText(const TQ_UINT8 *U8_pixel, TQ_UINT32 channelIndex) const
{
Q_ASSERT(channelIndex < (TQ_UINT32)nChannels());
const TQ_UINT16 *pixel = reinterpret_cast<const TQ_UINT16 *>(U8_pixel);
TQ_UINT32 channelPosition = channels()[channelIndex]->pos() / sizeof(TQ_UINT16);
return TQString().setNum(pixel[channelPosition]);
}
TQString KisU16BaseColorSpace::normalisedChannelValueText(const TQ_UINT8 *U8_pixel, TQ_UINT32 channelIndex) const
{
Q_ASSERT(channelIndex < (TQ_UINT32)nChannels());
const TQ_UINT16 *pixel = reinterpret_cast<const TQ_UINT16 *>(U8_pixel);
TQ_UINT32 channelPosition = m_channels[channelIndex]->pos() / sizeof(TQ_UINT16);
return TQString().setNum(100.0 * static_cast<float>(pixel[channelPosition]) / UINT16_MAX);
}
TQ_UINT8 KisU16BaseColorSpace::scaleToU8(const TQ_UINT8 * U8_pixel, TQ_INT32 channelPos)
{
const TQ_UINT16 *pixel = reinterpret_cast<const TQ_UINT16 *>(U8_pixel);
return UINT16_TO_UINT8(pixel[channelPos]);
}
TQ_UINT16 KisU16BaseColorSpace::scaleToU16(const TQ_UINT8 * U8_pixel, TQ_INT32 channelPos)
{
const TQ_UINT16 *pixel = reinterpret_cast<const TQ_UINT16 *>(U8_pixel);
return pixel[channelPos];
}
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