mirror of https://github.com/GNOME/gimp.git
131 lines
3.2 KiB
C
131 lines
3.2 KiB
C
/* The GIMP -- an image manipulation program
|
|
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
|
|
*
|
|
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <glib-object.h>
|
|
|
|
#include "libgimpcolor/gimpcolor.h"
|
|
#include "libgimpmath/gimpmath.h"
|
|
|
|
#include "base-types.h"
|
|
|
|
#include "colorize.h"
|
|
#include "pixel-region.h"
|
|
|
|
|
|
void
|
|
colorize_init (Colorize *colorize)
|
|
{
|
|
gint i;
|
|
|
|
g_return_if_fail (colorize != NULL);
|
|
|
|
colorize->hue = 180.0;
|
|
colorize->saturation = 50.0;
|
|
colorize->lightness = 0.0;
|
|
|
|
for (i = 0; i < 256; i ++)
|
|
{
|
|
colorize->lum_red_lookup[i] = i * GIMP_RGB_INTENSITY_RED;
|
|
colorize->lum_green_lookup[i] = i * GIMP_RGB_INTENSITY_GREEN;
|
|
colorize->lum_blue_lookup[i] = i * GIMP_RGB_INTENSITY_BLUE;
|
|
}
|
|
}
|
|
|
|
void
|
|
colorize_calculate (Colorize *colorize)
|
|
{
|
|
GimpHSL hsl;
|
|
GimpRGB rgb;
|
|
gint i;
|
|
|
|
g_return_if_fail (colorize != NULL);
|
|
|
|
hsl.h = colorize->hue / 360.0;
|
|
hsl.s = colorize->saturation / 100.0;
|
|
|
|
/* Calculate transfers */
|
|
for (i = 0; i < 256; i ++)
|
|
{
|
|
hsl.l = (gdouble) i / 255.0;
|
|
|
|
gimp_hsl_to_rgb (&hsl, &rgb);
|
|
|
|
colorize->final_red_lookup[i] = i * rgb.r;
|
|
colorize->final_green_lookup[i] = i * rgb.g;
|
|
colorize->final_blue_lookup[i] = i * rgb.b;
|
|
}
|
|
}
|
|
|
|
void
|
|
colorize (PixelRegion *srcPR,
|
|
PixelRegion *destPR,
|
|
Colorize *colorize)
|
|
{
|
|
guchar *src, *s;
|
|
guchar *dest, *d;
|
|
gboolean alpha;
|
|
gint w, h;
|
|
gint lum;
|
|
|
|
/* Set the transfer arrays (for speed) */
|
|
h = srcPR->h;
|
|
src = srcPR->data;
|
|
dest = destPR->data;
|
|
alpha = (srcPR->bytes == 4) ? TRUE : FALSE;
|
|
|
|
while (h--)
|
|
{
|
|
w = srcPR->w;
|
|
s = src;
|
|
d = dest;
|
|
|
|
while (w--)
|
|
{
|
|
lum = (colorize->lum_red_lookup[s[RED_PIX]] +
|
|
colorize->lum_green_lookup[s[GREEN_PIX]] +
|
|
colorize->lum_blue_lookup[s[BLUE_PIX]]); /* luminosity */
|
|
|
|
if (colorize->lightness > 0)
|
|
{
|
|
lum = (gdouble) lum * (100.0 - colorize->lightness) / 100.0;
|
|
|
|
lum += 255 - (100.0 - colorize->lightness) * 255.0 / 100.0;
|
|
}
|
|
else if (colorize->lightness < 0)
|
|
{
|
|
lum = (gdouble) lum * (colorize->lightness + 100.0) / 100.0;
|
|
}
|
|
|
|
d[RED_PIX] = colorize->final_red_lookup[lum];
|
|
d[GREEN_PIX] = colorize->final_green_lookup[lum];
|
|
d[BLUE_PIX] = colorize->final_blue_lookup[lum];
|
|
|
|
if (alpha)
|
|
d[ALPHA_PIX] = s[ALPHA_PIX];
|
|
|
|
s += srcPR->bytes;
|
|
d += destPR->bytes;
|
|
}
|
|
|
|
src += srcPR->rowstride;
|
|
dest += destPR->rowstride;
|
|
}
|
|
}
|