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/** \file
* \brief Old resize/stretch functions
*
* See Copyright Notice in im_lib.h
* $Id: old_imcolor.c,v 1.1 2008/10/17 06:10:16 scuri Exp $
*/
#include "old_im.h"
#include "im.h"
#include "im_util.h"
#include "im_image.h"
#include "im_convert.h"
void imRGB2Map(int width, int height,
unsigned char *red, unsigned char *green, unsigned char *blue,
unsigned char *map, int palette_count, long *palette)
{
imConvertRGB2Map(width, height,
red, green, blue,
map, palette, &palette_count);
}
void imMap2RGB(int width, int height, unsigned char *map, int palette_count, long *palette, unsigned char *red, unsigned char *green, unsigned char *blue)
{
int i, count, c, index;
unsigned char r[256], g[256], b[256];
for (c = 0; c < palette_count; c++)
imColorDecode(&r[c], &g[c], &b[c], palette[c]);
count = width*height;
for (i = 0; i < count; i++)
{
index = *map++;
*red++ = r[index];
*green++ = g[index];
*blue++ = b[index];
}
}
void imRGB2Gray(int width, int height, unsigned char *red, unsigned char *green, unsigned char *blue, unsigned char *map, long *grays)
{
int i, count, c;
for (c = 0; c < 256; c++)
*grays++ = imColorEncode((unsigned char)c, (unsigned char)c, (unsigned char)c);
count = width*height;
for (i = 0; i < count; i++)
{
*map++ = (unsigned char)((*red++ * 30 + *green++ * 59 + *blue++ * 11) / 100);
}
}
void imMap2Gray(int width, int height, unsigned char *map, int palette_count, long *palette, unsigned char *gray_map, long *grays)
{
int i, count, c;
unsigned char cnv_table[256];
unsigned char r, g, b;
for (c = 0; c < 256; c++)
*grays++ = imColorEncode((unsigned char)c, (unsigned char)c, (unsigned char)c);
for (c = 0; c < palette_count; c++)
{
imColorDecode(&r, &g, &b, palette[c]);
cnv_table[c] = (unsigned char)((r * 30 + g * 59 + b * 11) / 100);
}
count = width*height;
for (i = 0; i < count; i++)
{
*gray_map++ = cnv_table[*map++];
}
}
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