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/*
* The Mana World
* Copyright (C) 2007 The Mana World Development Team
*
* This file is part of The Mana World.
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <algorithm>
#include <sstream>
#include "dye.h"
Palette::Palette(const std::string &description)
{
int size = description.length();
if (size == 0) return;
if (description[0] != '#')
{
throw;
}
int pos = 1;
for (;;)
{
if (pos + 6 > size) break;
int v = 0;
for (int i = 0; i < 6; ++i)
{
char c = description[pos + i];
int n;
if ('0' <= c && c <= '9') n = c - '0';
else if ('A' <= c && c <= 'F') n = c - 'A' + 10;
else if ('a' <= c && c <= 'f') n = c - 'a' + 10;
else
throw;
v = (v << 4) | n;
}
Color c = { { v >> 16, v >> 8, v } };
mColors.push_back(c);
pos += 6;
if (pos == size) return;
if (description[pos] != ',') break;
++pos;
}
}
void Palette::getColor(int intensity, int color[3]) const
{
if (intensity == 0)
{
color[0] = 0;
color[1] = 0;
color[2] = 0;
return;
}
int last = mColors.size();
if (last == 0) return;
int i = intensity * last / 255;
int t = intensity * last % 255;
int j = t != 0 ? i : i - 1;
// Get the exact color if any, the next color otherwise.
int r2 = mColors[j].value[0],
g2 = mColors[j].value[1],
b2 = mColors[j].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.
int r1 = 0, g1 = 0, b1 = 0;
if (i > 0)
{
r1 = mColors[i - 1].value[0];
g1 = mColors[i - 1].value[1];
b1 = mColors[i - 1].value[2];
}
// Perform a linear interpolation.
color[0] = ((255 - t) * r1 + t * r2) / 255;
color[1] = ((255 - t) * g1 + t * g2) / 255;
color[2] = ((255 - t) * b1 + t * b2) / 255;
}
Dye::Dye(const std::string &description)
{
for (int i = 0; i < 7; ++i)
mPalettes[i] = 0;
if (description.empty()) return;
std::string::size_type next_pos = 0, length = description.length();
do
{
std::string::size_type pos = next_pos;
next_pos = description.find(';', pos);
if (next_pos == std::string::npos)
next_pos = length;
if (next_pos <= pos + 3 || description[pos + 1] != ':')
{
throw;
}
int i = 0;
switch (description[pos])
{
case 'R': i = 0; break;
case 'G': i = 1; break;
case 'Y': i = 2; break;
case 'B': i = 3; break;
case 'M': i = 4; break;
case 'C': i = 5; break;
case 'W': i = 6; break;
default:
throw;
}
mPalettes[i] = new Palette(description.substr(pos + 2, next_pos - pos - 2));
++next_pos;
}
while (next_pos < length);
}
Dye::~Dye()
{
for (int i = 0; i < 7; ++i)
delete mPalettes[i];
}
void Dye::update(int color[3]) const
{
int cmax = std::max(color[0], std::max(color[1], color[2]));
if (cmax == 0) return;
int cmin = std::min(color[0], std::min(color[1], color[2]));
int intensity = color[0] + color[1] + color[2];
if (cmin != cmax &&
(cmin != 0 || (intensity != cmax && intensity != 2 * cmax)))
{
// not pure
return;
}
int i = (color[0] != 0) | ((color[1] != 0) << 1) | ((color[2] != 0) << 2);
if (mPalettes[i - 1])
mPalettes[i - 1]->getColor(cmax, color);
}
void Dye::instantiate(std::string &target, const std::string &palettes)
{
std::string::size_type next_pos = target.find('|');
if (next_pos == std::string::npos || palettes.empty()) return;
++next_pos;
std::ostringstream s;
s << target.substr(0, next_pos);
std::string::size_type last_pos = target.length(), pal_pos = 0;
do
{
std::string::size_type pos = next_pos;
next_pos = target.find(';', pos);
if (next_pos == std::string::npos) next_pos = last_pos;
if (next_pos == pos + 1 && pal_pos != std::string::npos)
{
std::string::size_type pal_next_pos = palettes.find(';', pal_pos);
s << target[pos] << ':';
if (pal_next_pos == std::string::npos)
{
s << palettes.substr(pal_pos);
s << target.substr(next_pos);
pal_pos = std::string::npos;
break;
}
s << palettes.substr(pal_pos, pal_next_pos - pal_pos);
pal_pos = pal_next_pos + 1;
}
else if (next_pos > pos + 2)
{
s << target.substr(pos, next_pos - pos);
}
else
{
throw;
}
s << target[next_pos];
++next_pos;
}
while (next_pos < last_pos);
target = s.str();
}
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