gimp/app/core/gimpdrawable-convert.c

238 lines
6.5 KiB
C

/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
* Copyright (C) 1997-2004 Adam D. Moss <adam@gimp.org>
*
* 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 "core-types.h"
#include "base/pixel-region.h"
#include "base/tile-manager.h"
#include "gimpdrawable.h"
#include "gimpdrawable-convert.h"
void
gimp_drawable_convert_rgb (GimpDrawable *drawable,
TileManager *new_tiles,
GimpImageBaseType old_base_type)
{
PixelRegion srcPR, destPR;
gint row, col;
gint offset;
gint has_alpha;
const guchar *src, *s;
guchar *dest, *d;
const guchar *cmap;
gpointer pr;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (new_tiles != NULL);
has_alpha = gimp_drawable_has_alpha (drawable);
g_return_if_fail (tile_manager_bpp (new_tiles) == (has_alpha ? 4 : 3));
cmap = gimp_drawable_get_colormap (drawable);
pixel_region_init (&srcPR, drawable->tiles,
0, 0,
GIMP_ITEM (drawable)->width,
GIMP_ITEM (drawable)->height,
FALSE);
pixel_region_init (&destPR, new_tiles,
0, 0,
GIMP_ITEM (drawable)->width,
GIMP_ITEM (drawable)->height,
TRUE);
switch (old_base_type)
{
case GIMP_GRAY:
for (pr = pixel_regions_register (2, &srcPR, &destPR);
pr != NULL;
pr = pixel_regions_process (pr))
{
src = srcPR.data;
dest = destPR.data;
for (row = 0; row < srcPR.h; row++)
{
s = src;
d = dest;
for (col = 0; col < srcPR.w; col++)
{
d[RED_PIX] = *s;
d[GREEN_PIX] = *s;
d[BLUE_PIX] = *s;
d += 3;
s++;
if (has_alpha)
*d++ = *s++;
}
src += srcPR.rowstride;
dest += destPR.rowstride;
}
}
break;
case GIMP_INDEXED:
for (pr = pixel_regions_register (2, &srcPR, &destPR);
pr != NULL;
pr = pixel_regions_process (pr))
{
src = srcPR.data;
dest = destPR.data;
for (row = 0; row < srcPR.h; row++)
{
s = src;
d = dest;
for (col = 0; col < srcPR.w; col++)
{
offset = *s++ * 3;
d[RED_PIX] = cmap[offset + 0];
d[GREEN_PIX] = cmap[offset + 1];
d[BLUE_PIX] = cmap[offset + 2];
d += 3;
if (has_alpha)
*d++ = *s++;
}
src += srcPR.rowstride;
dest += destPR.rowstride;
}
}
break;
default:
break;
}
}
void
gimp_drawable_convert_grayscale (GimpDrawable *drawable,
TileManager *new_tiles,
GimpImageBaseType old_base_type)
{
PixelRegion srcPR, destPR;
gint row, col;
gint offset, val;
gboolean has_alpha;
const guchar *src, *s;
guchar *dest, *d;
const guchar *cmap;
gpointer pr;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (new_tiles != NULL);
has_alpha = gimp_drawable_has_alpha (drawable);
g_return_if_fail (tile_manager_bpp (new_tiles) == (has_alpha ? 2 : 1));
cmap = gimp_drawable_get_colormap (drawable);
pixel_region_init (&srcPR, drawable->tiles,
0, 0,
GIMP_ITEM (drawable)->width,
GIMP_ITEM (drawable)->height,
FALSE);
pixel_region_init (&destPR, new_tiles,
0, 0,
GIMP_ITEM (drawable)->width,
GIMP_ITEM (drawable)->height,
TRUE);
switch (old_base_type)
{
case GIMP_RGB:
for (pr = pixel_regions_register (2, &srcPR, &destPR);
pr != NULL;
pr = pixel_regions_process (pr))
{
src = srcPR.data;
dest = destPR.data;
for (row = 0; row < srcPR.h; row++)
{
s = src;
d = dest;
for (col = 0; col < srcPR.w; col++)
{
val = GIMP_RGB_LUMINANCE (s[RED_PIX],
s[GREEN_PIX],
s[BLUE_PIX]) + 0.5;
*d++ = (guchar) val;
s += 3;
if (has_alpha)
*d++ = *s++;
}
src += srcPR.rowstride;
dest += destPR.rowstride;
}
}
break;
case GIMP_INDEXED:
for (pr = pixel_regions_register (2, &srcPR, &destPR);
pr != NULL;
pr = pixel_regions_process (pr))
{
src = srcPR.data;
dest = destPR.data;
for (row = 0; row < srcPR.h; row++)
{
s = src;
d = dest;
for (col = 0; col < srcPR.w; col++)
{
offset = *s++ * 3;
val = GIMP_RGB_LUMINANCE (cmap[offset+0],
cmap[offset+1],
cmap[offset+2]) + 0.5;
*d++ = (guchar) val;
if (has_alpha)
*d++ = *s++;
}
src += srcPR.rowstride;
dest += destPR.rowstride;
}
}
break;
default:
break;
}
}