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/*
* The ManaPlus Client
* Copyright (C) 2007-2009 The Mana World Development Team
* Copyright (C) 2009-2010 The Mana Developers
* Copyright (C) 2011-2016 The ManaPlus Developers
*
* This file is part of The ManaPlus Client.
*
* 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
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "resources/dye/dyepalette.h"
#include "logger.h"
#ifndef DYECMD
#include "resources/db/palettedb.h"
#endif // DYECMD
#include "utils/stringutils.h"
#ifndef USE_SDL2
#include <cmath>
#endif // USE_SDL2
#ifndef SDL_BIG_ENDIAN
#include <SDL_endian.h>
#endif // SDL_BYTEORDER
#include "debug.h"
DyePalette::DyePalette(const std::string &restrict description,
const uint8_t blockSize) :
mColors()
{
const size_t size = CAST_SIZE(description.length());
if (size == 0)
return;
StringVect parts;
splitToStringVector(parts, description.substr(1), ',');
if (description[0] == '#')
{
FOR_EACH (StringVectCIter, it, parts)
{
DyeColor color(0, 0, 0, 0);
hexToColor(*it, blockSize, color);
mColors.push_back(color);
}
return;
}
#ifndef DYECMD
else if (description[0] == '@')
{
uint8_t alpha = 255;
FOR_EACH (StringVectCIter, it, parts)
{
const std::string str = *it;
if (str.empty())
continue;
if (str[0] == '+')
{
if (str.size() != 3)
continue;
alpha = CAST_U8((hexDecode(str[1]) << 4) + hexDecode(str[2]));
continue;
}
const DyeColor *const color = PaletteDB::getColor(str);
if (color)
{
DyeColor color2 = *color;
color2.value[3] = alpha;
mColors.push_back(color2);
}
else
{
DyeColor color2(0, 0, 0, 0);
hexToColor(str, blockSize, color2);
mColors.push_back(color2);
}
}
return;
}
#endif // DYECMD
logger->log("Error, invalid embedded palette: %s", description.c_str());
}
void DyePalette::hexToColor(const std::string &restrict hexStr,
const uint8_t blockSize,
DyeColor &color) noexcept2
{
for (size_t i = 0, colorIdx = 0;
i < blockSize && colorIdx < 4;
i += 2, colorIdx ++)
{
color.value[colorIdx] = CAST_U8((
hexDecode(hexStr[i]) << 4)
+ hexDecode(hexStr[i + 1]));
}
}
unsigned int DyePalette::hexDecode(const signed char c) noexcept2
{
if ('0' <= c && c <= '9')
return c - '0';
else if ('A' <= c && c <= 'F')
return c - 'A' + 10;
else if ('a' <= c && c <= 'f')
return c - 'a' + 10;
else
return 0;
}
void DyePalette::getColor(const unsigned int intensity,
unsigned int (&restrict color)[3]) const restrict2
{
if (intensity == 0)
{
color[0] = 0;
color[1] = 0;
color[2] = 0;
return;
}
const int last = CAST_S32(mColors.size());
if (last == 0)
return;
const int intLast = intensity * last;
const int i = intLast / 255;
const int t = intLast % 255;
int j = t != 0 ? i : i - 1;
if (j >= last)
j = 0;
// Get the exact color if any, the next color otherwise.
const DyeColor &colorJ = mColors[j];
const int r2 = colorJ.value[0];
const int g2 = colorJ.value[1];
const int b2 = colorJ.value[2];
if (t == 0)
{
// Exact color.
color[0] = r2;
color[1] = g2;
color[2] = b2;
return;
}
// Get the previous color. First color is implicitly black.
if (i > 0 && i < last + 1)
{
const DyeColor &colorI = mColors[i - 1];
const int t2 = 255 - t;
// Perform a linear interpolation.
color[0] = (t2 * colorI.value[0] + t * r2) / 255;
color[1] = (t2 * colorI.value[1] + t * g2) / 255;
color[2] = (t2 * colorI.value[2] + t * b2) / 255;
}
else
{
// Perform a linear interpolation.
color[0] = (t * r2) / 255;
color[1] = (t * g2) / 255;
color[2] = (t * b2) / 255;
}
}
void DyePalette::getColor(double intensity,
int (&restrict color)[3]) const restrict2
{
// Nothing to do here
if (mColors.empty())
return;
// Force range
if (intensity > 1.0)
intensity = 1.0;
else if (intensity < 0.0)
intensity = 0.0;
// Scale up
intensity *= static_cast<double>(mColors.size() - 1);
// Color indices
const int i = CAST_S32(floor(intensity));
const int j = CAST_S32(ceil(intensity));
const DyeColor &colorI = mColors[i];
if (i == j)
{
// Exact color.
color[0] = colorI.value[0];
color[1] = colorI.value[1];
color[2] = colorI.value[2];
return;
}
intensity -= i;
const double rest = 1 - intensity;
const DyeColor &colorJ = mColors[j];
// Perform the interpolation.
color[0] = CAST_S32(rest * colorI.value[0] +
intensity * colorJ.value[0]);
color[1] = CAST_S32(rest * colorI.value[1] +
intensity * colorJ.value[1]);
color[2] = CAST_S32(rest * colorI.value[2] +
intensity * colorJ.value[2]);
}
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