mirror of https://github.com/GNOME/gimp.git
291 lines
8.1 KiB
C
291 lines
8.1 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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* Copyright (C) 1997-2004 Adam D. Moss <adam@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include "libgimpcolor/gimpcolor.h"
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#include "core-types.h"
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#include "base/pixel-region.h"
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#include "base/tile-manager.h"
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#include "gimpdrawable.h"
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#include "gimpdrawable-convert.h"
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#include "gimpimage.h"
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void
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gimp_drawable_convert_rgb (GimpDrawable *drawable,
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gboolean push_undo)
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{
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GimpImageType type;
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TileManager *tiles;
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g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
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g_return_if_fail (! gimp_drawable_is_rgb (drawable));
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type = GIMP_RGB_IMAGE;
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if (gimp_drawable_has_alpha (drawable))
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type = GIMP_IMAGE_TYPE_WITH_ALPHA (type);
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tiles = tile_manager_new (gimp_item_get_width (GIMP_ITEM (drawable)),
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gimp_item_get_height (GIMP_ITEM (drawable)),
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GIMP_IMAGE_TYPE_BYTES (type));
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gimp_drawable_convert_tiles_rgb (drawable, tiles);
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gimp_drawable_set_tiles (drawable, push_undo, NULL,
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tiles, type);
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tile_manager_unref (tiles);
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}
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void
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gimp_drawable_convert_grayscale (GimpDrawable *drawable,
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gboolean push_undo)
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{
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GimpImageType type;
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TileManager *tiles;
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g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
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g_return_if_fail (! gimp_drawable_is_gray (drawable));
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type = GIMP_GRAY_IMAGE;
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if (gimp_drawable_has_alpha (drawable))
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type = GIMP_IMAGE_TYPE_WITH_ALPHA (type);
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tiles = tile_manager_new (gimp_item_get_width (GIMP_ITEM (drawable)),
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gimp_item_get_height (GIMP_ITEM (drawable)),
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GIMP_IMAGE_TYPE_BYTES (type));
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gimp_drawable_convert_tiles_grayscale (drawable, tiles);
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gimp_drawable_set_tiles (drawable, push_undo, NULL,
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tiles, type);
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tile_manager_unref (tiles);
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}
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void
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gimp_drawable_convert_tiles_rgb (GimpDrawable *drawable,
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TileManager *new_tiles)
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{
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PixelRegion srcPR, destPR;
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gint row, col;
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gint offset;
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GimpImageType type;
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gboolean has_alpha;
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const guchar *src, *s;
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guchar *dest, *d;
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const guchar *cmap;
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gpointer pr;
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g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
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g_return_if_fail (new_tiles != NULL);
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type = gimp_drawable_type (drawable);
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has_alpha = gimp_drawable_has_alpha (drawable);
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g_return_if_fail (tile_manager_bpp (new_tiles) == (has_alpha ? 4 : 3));
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cmap = gimp_drawable_get_colormap (drawable);
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pixel_region_init (&srcPR, gimp_drawable_get_tiles (drawable),
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0, 0,
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gimp_item_get_width (GIMP_ITEM (drawable)),
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gimp_item_get_height (GIMP_ITEM (drawable)),
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FALSE);
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pixel_region_init (&destPR, new_tiles,
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0, 0,
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gimp_item_get_width (GIMP_ITEM (drawable)),
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gimp_item_get_height (GIMP_ITEM (drawable)),
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TRUE);
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switch (GIMP_IMAGE_TYPE_BASE_TYPE (type))
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{
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case GIMP_GRAY:
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for (pr = pixel_regions_register (2, &srcPR, &destPR);
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pr != NULL;
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pr = pixel_regions_process (pr))
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{
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src = srcPR.data;
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dest = destPR.data;
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for (row = 0; row < srcPR.h; row++)
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{
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s = src;
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d = dest;
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for (col = 0; col < srcPR.w; col++)
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{
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d[RED] = *s;
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d[GREEN] = *s;
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d[BLUE] = *s;
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d += 3;
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s++;
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if (has_alpha)
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*d++ = *s++;
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}
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src += srcPR.rowstride;
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dest += destPR.rowstride;
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}
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}
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break;
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case GIMP_INDEXED:
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for (pr = pixel_regions_register (2, &srcPR, &destPR);
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pr != NULL;
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pr = pixel_regions_process (pr))
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{
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src = srcPR.data;
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dest = destPR.data;
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for (row = 0; row < srcPR.h; row++)
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{
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s = src;
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d = dest;
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for (col = 0; col < srcPR.w; col++)
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{
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offset = *s++ * 3;
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d[RED] = cmap[offset + 0];
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d[GREEN] = cmap[offset + 1];
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d[BLUE] = cmap[offset + 2];
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d += 3;
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if (has_alpha)
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*d++ = *s++;
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}
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src += srcPR.rowstride;
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dest += destPR.rowstride;
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}
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}
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break;
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default:
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break;
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}
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}
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void
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gimp_drawable_convert_tiles_grayscale (GimpDrawable *drawable,
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TileManager *new_tiles)
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{
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PixelRegion srcPR, destPR;
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gint row, col;
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gint offset, val;
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GimpImageType type;
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gboolean has_alpha;
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const guchar *src, *s;
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guchar *dest, *d;
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const guchar *cmap;
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gpointer pr;
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g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
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g_return_if_fail (new_tiles != NULL);
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type = gimp_drawable_type (drawable);
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has_alpha = gimp_drawable_has_alpha (drawable);
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g_return_if_fail (tile_manager_bpp (new_tiles) == (has_alpha ? 2 : 1));
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cmap = gimp_drawable_get_colormap (drawable);
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pixel_region_init (&srcPR, gimp_drawable_get_tiles (drawable),
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0, 0,
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gimp_item_get_width (GIMP_ITEM (drawable)),
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gimp_item_get_height (GIMP_ITEM (drawable)),
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FALSE);
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pixel_region_init (&destPR, new_tiles,
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0, 0,
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gimp_item_get_width (GIMP_ITEM (drawable)),
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gimp_item_get_height (GIMP_ITEM (drawable)),
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TRUE);
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switch (GIMP_IMAGE_TYPE_BASE_TYPE (type))
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{
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case GIMP_RGB:
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for (pr = pixel_regions_register (2, &srcPR, &destPR);
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pr != NULL;
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pr = pixel_regions_process (pr))
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{
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src = srcPR.data;
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dest = destPR.data;
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for (row = 0; row < srcPR.h; row++)
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{
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s = src;
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d = dest;
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for (col = 0; col < srcPR.w; col++)
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{
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val = GIMP_RGB_LUMINANCE (s[RED],
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s[GREEN],
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s[BLUE]) + 0.5;
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*d++ = (guchar) val;
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s += 3;
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if (has_alpha)
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*d++ = *s++;
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}
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src += srcPR.rowstride;
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dest += destPR.rowstride;
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}
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}
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break;
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case GIMP_INDEXED:
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for (pr = pixel_regions_register (2, &srcPR, &destPR);
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pr != NULL;
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pr = pixel_regions_process (pr))
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{
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src = srcPR.data;
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dest = destPR.data;
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for (row = 0; row < srcPR.h; row++)
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{
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s = src;
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d = dest;
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for (col = 0; col < srcPR.w; col++)
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{
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offset = *s++ * 3;
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val = GIMP_RGB_LUMINANCE (cmap[offset+0],
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cmap[offset+1],
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cmap[offset+2]) + 0.5;
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*d++ = (guchar) val;
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if (has_alpha)
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*d++ = *s++;
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}
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src += srcPR.rowstride;
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dest += destPR.rowstride;
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}
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}
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break;
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default:
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break;
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}
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}
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