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/*
* Copyright (C) 2006 Michael H. Schimek
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: lut_rgb16-gen.c,v 1.2 2006/03/11 13:15:00 mschimek Exp $ */
/* Generates look-up tables for image format conversion. */
#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h> /* uint16_t */
#include "misc.h" /* SWAB16() */
static uint16_t lut_rgb16[2][6][256];
int
main (void)
{
unsigned int i;
for (i = 0; i < 256; ++i) {
unsigned int n;
n = (i << 8) & 0xF800;
lut_rgb16[0][0][i] = n; /* BGR red / RGB blue */
lut_rgb16[1][0][i] = SWAB16 (n);
n = (i << 7) & 0x7C00;
lut_rgb16[0][1][i] = n; /* BGRA red / ARGB blue */
lut_rgb16[1][1][i] = SWAB16 (n);
n = (i << 3) & 0x07E0;
lut_rgb16[0][2][i] = n; /* BGR / RGB green */
lut_rgb16[1][2][i] = SWAB16 (n);
n = (i << 2) & 0x03E0;
lut_rgb16[0][3][i] = n; /* BGRA / RGBA green */
lut_rgb16[1][3][i] = SWAB16 (n);
n = (i >> 3) & 0x001F;
lut_rgb16[0][4][i] = n; /* blue / red */
lut_rgb16[1][4][i] = SWAB16 (n);
n = (i << 8) & 0x8000;
lut_rgb16[0][5][i] = n; /* alpha */
lut_rgb16[1][5][i] = SWAB16 (n);
}
fputs ("/* Generated file, do not edit! */\n"
"\n"
"#include <inttypes.h>\n"
"\n"
"const uint16_t\n"
"_tv_lut_rgb16 [2][6][256] = {\n\t", stdout);
for (i = 0; i < 2; ++i) {
unsigned int j;
fputs ("{\n\t\t", stdout);
for (j = 0; j < 6; ++j) {
unsigned int k;
fputs ("{", stdout);
for (k = 0; k < 256; k += 8) {
unsigned int l;
fputs ("\n\t\t\t", stdout);
for (l = 0; l < 8; ++l) {
printf ("0x%04x, ",
lut_rgb16[i][j][k + l]);
}
}
fputs ("\n\t\t}, ", stdout);
}
fputs ("\n\t}, ", stdout);
}
fputs ("\n};\n\n", stdout);
exit (EXIT_SUCCESS);
return 0;
}
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