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/*
* Copyright 1994-2022 Olivier Girondel
*
* This file is part of lebiniou.
*
* lebiniou 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.
*
* lebiniou 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 lebiniou. If not, see <http://www.gnu.org/licenses/>.
*/
#include "context.h"
uint32_t version = 0;
uint32_t options = BO_LENS;
char desc[] = "Emboss filter";
char dname[] = "Emboss";
void
run(Context_t *ctx)
{
const Buffer8_t *src = active_buffer(ctx);
Buffer8_t *dst = passive_buffer(ctx);
const Pixel_t* nw = src->buffer;
const Pixel_t* se = src->buffer + 2 * WIDTH + 2;
Pixel_t *d;
for (d = dst->buffer + WIDTH + 1; d < dst->buffer + (BUFFSIZE - WIDTH - 1); ) {
*d++ = ((*nw++ - *se++) / 2) + 128;
}
}
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