120 lines
3.3 KiB
C++
120 lines
3.3 KiB
C++
|
|
/* Rgb2Hires
|
|
* Copyright (C) 2016 Christophe Meneboeuf <christophe@xtof.info>
|
|
*
|
|
* 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 3 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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stdexcept>
|
|
//#include "ImageQuantized.h"
|
|
#include "HiRes.h"
|
|
|
|
|
|
using namespace std;
|
|
|
|
namespace RgbToHires {
|
|
|
|
|
|
/************************* CLASS BlockHr **********************/
|
|
|
|
BlockHr::BlockHr()
|
|
{
|
|
_data[0] = 0;
|
|
_data[1] = 0;
|
|
}
|
|
|
|
BlockHr::BlockHr(const BlockPixel& source)
|
|
{
|
|
const auto groups = getGroup(source);
|
|
//Init data, depending on the group
|
|
groups.first == GROUP_1 ? _data[0] = 0x0 : _data[0] = 0x80;
|
|
groups.second == GROUP_1 ? _data[1] = 0x0 : _data[1] = 0x80;
|
|
//Getting the bit pairs
|
|
//Left 7 bit group
|
|
_data[0] |= getDibit(source[0]);
|
|
_data[0] |= (getDibit(source[1]) << 2);
|
|
_data[0] |= (getDibit(source[2]) << 4);
|
|
//Right 7 bit group
|
|
_data[1] |= getDibit(source[4]) << 1;
|
|
_data[1] |= (getDibit(source[5]) << 3);
|
|
_data[1] |= (getDibit(source[6]) << 5);
|
|
//Middle pixel
|
|
auto byte = getDibit(source[3]);
|
|
_data[0] |= ((byte & 0x1) << 6);
|
|
_data[1] |= ((byte >> 1) & 0x1);
|
|
}
|
|
|
|
|
|
pair<BlockHr::eColorGroup, BlockHr::eColorGroup> BlockHr::getGroup(const BlockPixel& block) const
|
|
{
|
|
pair<eColorGroup, eColorGroup> groups{ UNDEF, UNDEF };
|
|
//1st block group, including the last semi-pixel
|
|
for (auto i = 0u; i < 4u; ++i) {
|
|
if (block[i] == GREEN || block[i] == VIOLET) {
|
|
groups.first = GROUP_1;
|
|
break;
|
|
}
|
|
else if (block[i] == ORANGE || block[i] == BLUE) {
|
|
groups.first = GROUP_2;
|
|
break;
|
|
}
|
|
}
|
|
//2nd block group, excluding the first semi-pixel
|
|
for (auto i = 4u; i < 7u; ++i) {
|
|
if (block[i] == GREEN || block[i] == VIOLET) {
|
|
groups.second = GROUP_1;
|
|
break;
|
|
}
|
|
else if (block[i] == ORANGE || block[i] == BLUE) {
|
|
groups.second = GROUP_2;
|
|
break;
|
|
}
|
|
}
|
|
// if only black or white pixel: groups are still undefined
|
|
if (groups.first == UNDEF) { // 1st 3.5-pixels were black or white
|
|
groups.first = groups.second;
|
|
}
|
|
if (groups.second == UNDEF) { // 2nd 35-pixels were black or white
|
|
groups.second = groups.first;
|
|
}
|
|
if (groups.first == UNDEF) { // all the 7-pixels were black or white
|
|
groups.first = GROUP_1;
|
|
groups.second = GROUP_1;
|
|
}
|
|
return groups;
|
|
}
|
|
|
|
|
|
uint8_t BlockHr::getDibit(const Color& color) const
|
|
{
|
|
if (color == WHITE) {
|
|
return 3;
|
|
}
|
|
else if (color == BLACK) {
|
|
return 0;
|
|
}
|
|
else if (color == VIOLET || color == BLUE) {
|
|
return 1;
|
|
}
|
|
else if (color == GREEN || color == ORANGE) {
|
|
return 2;
|
|
}
|
|
else {
|
|
auto msg = string("Unsupported color used as input for hires pixel\nRGB:");
|
|
msg = msg + to_string(color.r) + to_string(color.g) + to_string(color.b);
|
|
throw(runtime_error(msg));
|
|
}
|
|
}
|
|
|
|
} |