445 lines
12 KiB
C
445 lines
12 KiB
C
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/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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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 <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include <cairo.h>
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#include <gegl.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include "libpikacolor/pikacolor.h"
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#include "core-types.h"
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#include "gegl/pika-babl.h"
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#include "pika.h"
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#include "pikacontainer.h"
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#include "pikadatafactory.h"
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#include "pikaimage.h"
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#include "pikaimage-colormap.h"
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#include "pikaimage-private.h"
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#include "pikaimage-undo-push.h"
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#include "pikapalette.h"
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#include "pika-intl.h"
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/* local function prototype */
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static void pika_image_colormap_set_palette_entry (PikaImage *image,
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const PikaRGB *color,
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gint index);
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/* public functions */
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void
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pika_image_colormap_init (PikaImage *image)
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{
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PikaImagePrivate *private;
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PikaContainer *palettes;
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gchar *palette_name;
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gchar *palette_id;
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g_return_if_fail (PIKA_IS_IMAGE (image));
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private = PIKA_IMAGE_GET_PRIVATE (image);
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g_return_if_fail (private->palette == NULL);
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palette_name = g_strdup_printf (_("Colormap of Image #%d (%s)"),
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pika_image_get_id (image),
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pika_image_get_display_name (image));
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palette_id = g_strdup_printf ("pika-indexed-image-palette-%d",
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pika_image_get_id (image));
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private->palette = PIKA_PALETTE (pika_palette_new (NULL, palette_name));
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pika_image_colormap_update_formats (image);
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pika_palette_set_columns (private->palette, 16);
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pika_data_make_internal (PIKA_DATA (private->palette), palette_id);
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palettes = pika_data_factory_get_container (image->pika->palette_factory);
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pika_container_add (palettes, PIKA_OBJECT (private->palette));
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g_free (palette_name);
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g_free (palette_id);
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}
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void
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pika_image_colormap_dispose (PikaImage *image)
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{
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PikaImagePrivate *private;
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PikaContainer *palettes;
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g_return_if_fail (PIKA_IS_IMAGE (image));
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private = PIKA_IMAGE_GET_PRIVATE (image);
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g_return_if_fail (PIKA_IS_PALETTE (private->palette));
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palettes = pika_data_factory_get_container (image->pika->palette_factory);
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pika_container_remove (palettes, PIKA_OBJECT (private->palette));
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}
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void
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pika_image_colormap_free (PikaImage *image)
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{
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PikaImagePrivate *private;
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g_return_if_fail (PIKA_IS_IMAGE (image));
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private = PIKA_IMAGE_GET_PRIVATE (image);
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g_return_if_fail (PIKA_IS_PALETTE (private->palette));
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g_clear_object (&private->palette);
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/* don't touch the image's babl_palettes because we might still have
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* buffers with that palette on the undo stack, and on undoing the
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* image back to indexed, we must have exactly these palettes around
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*/
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}
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void
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pika_image_colormap_update_formats (PikaImage *image)
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{
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PikaImagePrivate *private;
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const Babl *space;
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gchar *format_name;
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g_return_if_fail (PIKA_IS_IMAGE (image));
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private = PIKA_IMAGE_GET_PRIVATE (image);
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space = pika_image_get_layer_space (image);
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format_name = g_strdup_printf ("-pika-indexed-format-%d",
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pika_image_get_id (image));
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babl_new_palette_with_space (format_name, space,
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&private->babl_palette_rgb,
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&private->babl_palette_rgba);
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g_free (format_name);
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if (private->palette && pika_palette_get_n_colors (private->palette) > 0)
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{
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guchar *colormap;
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gint n_colors;
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colormap = pika_image_get_colormap (image);
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n_colors = pika_image_get_colormap_size (image);
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babl_palette_set_palette (private->babl_palette_rgb,
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pika_babl_format (PIKA_RGB,
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private->precision, FALSE,
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space),
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colormap,
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n_colors);
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babl_palette_set_palette (private->babl_palette_rgba,
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pika_babl_format (PIKA_RGB,
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private->precision, FALSE,
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space),
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colormap,
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n_colors);
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g_free (colormap);
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}
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}
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const Babl *
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pika_image_colormap_get_rgb_format (PikaImage *image)
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{
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g_return_val_if_fail (PIKA_IS_IMAGE (image), NULL);
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return PIKA_IMAGE_GET_PRIVATE (image)->babl_palette_rgb;
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}
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const Babl *
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pika_image_colormap_get_rgba_format (PikaImage *image)
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{
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g_return_val_if_fail (PIKA_IS_IMAGE (image), NULL);
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return PIKA_IMAGE_GET_PRIVATE (image)->babl_palette_rgba;
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}
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PikaPalette *
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pika_image_get_colormap_palette (PikaImage *image)
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{
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g_return_val_if_fail (PIKA_IS_IMAGE (image), NULL);
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return PIKA_IMAGE_GET_PRIVATE (image)->palette;
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}
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void
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pika_image_set_colormap_palette (PikaImage *image,
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PikaPalette *palette,
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gboolean push_undo)
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{
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PikaImagePrivate *private;
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PikaPaletteEntry *entry;
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gint n_colors, i;
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g_return_if_fail (PIKA_IS_IMAGE (image));
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g_return_if_fail (palette != NULL);
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n_colors = pika_palette_get_n_colors (palette);
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g_return_if_fail (n_colors >= 0 && n_colors <= 256);
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private = PIKA_IMAGE_GET_PRIVATE (image);
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if (push_undo)
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pika_image_undo_push_image_colormap (image, C_("undo-type", "Set Colormap"));
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if (!private->palette)
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pika_image_colormap_init (image);
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pika_data_freeze (PIKA_DATA (private->palette));
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while ((entry = pika_palette_get_entry (private->palette, 0)))
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pika_palette_delete_entry (private->palette, entry);
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for (i = 0; i < n_colors; i++)
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{
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PikaPaletteEntry *entry = pika_palette_get_entry (palette, i);
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pika_image_colormap_set_palette_entry (image, &entry->color, i);
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}
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pika_data_thaw (PIKA_DATA (private->palette));
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pika_image_colormap_changed (image, -1);
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}
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guchar *
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pika_image_get_colormap (PikaImage *image)
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{
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PikaImagePrivate *private;
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guchar *colormap = NULL;
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gint n_colors, i;
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g_return_val_if_fail (PIKA_IS_IMAGE (image), NULL);
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private = PIKA_IMAGE_GET_PRIVATE (image);
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if (private->palette == NULL)
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return NULL;
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n_colors = pika_palette_get_n_colors (private->palette);
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if (n_colors > 0)
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{
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colormap = g_new0 (guchar, PIKA_IMAGE_COLORMAP_SIZE);
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for (i = 0; i < n_colors; i++)
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{
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PikaPaletteEntry *entry = pika_palette_get_entry (private->palette, i);
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pika_rgb_get_uchar (&entry->color,
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&colormap[i * 3],
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&colormap[i * 3 + 1],
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&colormap[i * 3 + 2]);
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}
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}
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return colormap;
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}
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gint
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pika_image_get_colormap_size (PikaImage *image)
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{
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PikaImagePrivate *private;
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g_return_val_if_fail (PIKA_IS_IMAGE (image), 0);
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private = PIKA_IMAGE_GET_PRIVATE (image);
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if (private->palette == NULL)
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return 0;
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return pika_palette_get_n_colors (private->palette);
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}
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void
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pika_image_set_colormap (PikaImage *image,
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const guchar *colormap,
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gint n_colors,
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gboolean push_undo)
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{
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PikaImagePrivate *private;
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PikaPaletteEntry *entry;
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gint i;
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g_return_if_fail (PIKA_IS_IMAGE (image));
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g_return_if_fail (colormap != NULL || n_colors == 0);
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g_return_if_fail (n_colors >= 0 && n_colors <= 256);
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private = PIKA_IMAGE_GET_PRIVATE (image);
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if (push_undo)
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pika_image_undo_push_image_colormap (image, C_("undo-type", "Set Colormap"));
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if (!private->palette)
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pika_image_colormap_init (image);
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pika_data_freeze (PIKA_DATA (private->palette));
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while ((entry = pika_palette_get_entry (private->palette, 0)))
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pika_palette_delete_entry (private->palette, entry);
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for (i = 0; i < n_colors; i++)
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{
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PikaRGB color;
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pika_rgba_set_uchar (&color,
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colormap[3 * i + 0],
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colormap[3 * i + 1],
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colormap[3 * i + 2],
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255);
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pika_image_colormap_set_palette_entry (image, &color, i);
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}
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pika_data_thaw (PIKA_DATA (private->palette));
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pika_image_colormap_changed (image, -1);
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}
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void
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pika_image_unset_colormap (PikaImage *image,
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gboolean push_undo)
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{
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PikaImagePrivate *private;
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g_return_if_fail (PIKA_IS_IMAGE (image));
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private = PIKA_IMAGE_GET_PRIVATE (image);
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if (push_undo)
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pika_image_undo_push_image_colormap (image,
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C_("undo-type", "Unset Colormap"));
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if (private->palette)
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{
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pika_image_colormap_dispose (image);
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pika_image_colormap_free (image);
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}
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pika_image_colormap_changed (image, -1);
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}
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void
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pika_image_get_colormap_entry (PikaImage *image,
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gint color_index,
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PikaRGB *color)
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{
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PikaImagePrivate *private;
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PikaPaletteEntry *entry;
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g_return_if_fail (PIKA_IS_IMAGE (image));
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private = PIKA_IMAGE_GET_PRIVATE (image);
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g_return_if_fail (private->palette != NULL);
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g_return_if_fail (color_index >= 0 &&
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color_index < pika_palette_get_n_colors (private->palette));
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g_return_if_fail (color != NULL);
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entry = pika_palette_get_entry (private->palette, color_index);
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g_return_if_fail (entry != NULL);
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*color = entry->color;
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}
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void
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pika_image_set_colormap_entry (PikaImage *image,
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gint color_index,
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const PikaRGB *color,
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gboolean push_undo)
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{
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PikaImagePrivate *private;
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g_return_if_fail (PIKA_IS_IMAGE (image));
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private = PIKA_IMAGE_GET_PRIVATE (image);
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g_return_if_fail (private->palette != NULL);
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g_return_if_fail (color_index >= 0 &&
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color_index < pika_palette_get_n_colors (private->palette));
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g_return_if_fail (color != NULL);
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if (push_undo)
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pika_image_undo_push_image_colormap (image,
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C_("undo-type", "Change Colormap entry"));
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pika_image_colormap_set_palette_entry (image, color, color_index);
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pika_image_colormap_changed (image, color_index);
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}
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void
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pika_image_add_colormap_entry (PikaImage *image,
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const PikaRGB *color)
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{
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PikaImagePrivate *private;
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g_return_if_fail (PIKA_IS_IMAGE (image));
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private = PIKA_IMAGE_GET_PRIVATE (image);
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g_return_if_fail (private->palette != NULL);
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g_return_if_fail (pika_palette_get_n_colors (private->palette) < 256);
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g_return_if_fail (color != NULL);
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pika_image_undo_push_image_colormap (image,
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C_("undo-type", "Add Color to Colormap"));
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pika_image_colormap_set_palette_entry (image, color,
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pika_palette_get_n_colors (private->palette));
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pika_image_colormap_changed (image, -1);
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}
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/* private functions */
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static void
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pika_image_colormap_set_palette_entry (PikaImage *image,
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const PikaRGB *color,
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gint index)
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{
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PikaImagePrivate *private = PIKA_IMAGE_GET_PRIVATE (image);
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PikaRGB black;
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gchar name[64];
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g_return_if_fail (color != NULL);
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pika_rgb_set (&black, 0, 0, 0);
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while (pika_palette_get_n_colors (private->palette) <= index)
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pika_palette_add_entry (private->palette, index, name, &black);
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|
g_snprintf (name, sizeof (name), "#%d", index);
|
||
|
|
||
|
pika_palette_set_entry (private->palette, index, name, color);
|
||
|
}
|