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-rw-r--r--app/core/gimpimage-colormap.c362
1 files changed, 362 insertions, 0 deletions
diff --git a/app/core/gimpimage-colormap.c b/app/core/gimpimage-colormap.c
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+/* GIMP - The GNU 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 3 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <cairo.h>
+#include <gegl.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpcolor/gimpcolor.h"
+
+#include "core-types.h"
+
+#include "gimp.h"
+#include "gimpcontainer.h"
+#include "gimpdatafactory.h"
+#include "gimpimage.h"
+#include "gimpimage-colormap.h"
+#include "gimpimage-private.h"
+#include "gimpimage-undo-push.h"
+#include "gimppalette.h"
+
+#include "gimp-intl.h"
+
+
+/* local function prototype */
+
+static void gimp_image_colormap_set_palette_entry (GimpImage *image,
+ const GimpRGB *color,
+ gint index);
+
+
+/* public functions */
+
+void
+gimp_image_colormap_init (GimpImage *image)
+{
+ GimpImagePrivate *private;
+ GimpContainer *palettes;
+ gchar *palette_name;
+ gchar *palette_id;
+
+ g_return_if_fail (GIMP_IS_IMAGE (image));
+
+ private = GIMP_IMAGE_GET_PRIVATE (image);
+
+ g_return_if_fail (private->colormap == NULL);
+ g_return_if_fail (private->palette == NULL);
+
+ palette_name = g_strdup_printf (_("Colormap of Image #%d (%s)"),
+ gimp_image_get_ID (image),
+ gimp_image_get_display_name (image));
+ palette_id = g_strdup_printf ("gimp-indexed-image-palette-%d",
+ gimp_image_get_ID (image));
+
+ private->n_colors = 0;
+ private->colormap = g_new0 (guchar, GIMP_IMAGE_COLORMAP_SIZE);
+ private->palette = GIMP_PALETTE (gimp_palette_new (NULL, palette_name));
+
+ if (! private->babl_palette_rgb)
+ {
+ gchar *format_name = g_strdup_printf ("-gimp-indexed-format-%d",
+ gimp_image_get_ID (image));
+
+ babl_new_palette (format_name,
+ &private->babl_palette_rgb,
+ &private->babl_palette_rgba);
+
+ g_free (format_name);
+ }
+
+ gimp_palette_set_columns (private->palette, 16);
+
+ gimp_data_make_internal (GIMP_DATA (private->palette), palette_id);
+
+ palettes = gimp_data_factory_get_container (image->gimp->palette_factory);
+
+ gimp_container_add (palettes, GIMP_OBJECT (private->palette));
+
+ g_free (palette_name);
+ g_free (palette_id);
+}
+
+void
+gimp_image_colormap_dispose (GimpImage *image)
+{
+ GimpImagePrivate *private;
+ GimpContainer *palettes;
+
+ g_return_if_fail (GIMP_IS_IMAGE (image));
+
+ private = GIMP_IMAGE_GET_PRIVATE (image);
+
+ g_return_if_fail (private->colormap != NULL);
+ g_return_if_fail (GIMP_IS_PALETTE (private->palette));
+
+ palettes = gimp_data_factory_get_container (image->gimp->palette_factory);
+
+ gimp_container_remove (palettes, GIMP_OBJECT (private->palette));
+}
+
+void
+gimp_image_colormap_free (GimpImage *image)
+{
+ GimpImagePrivate *private;
+
+ g_return_if_fail (GIMP_IS_IMAGE (image));
+
+ private = GIMP_IMAGE_GET_PRIVATE (image);
+
+ g_return_if_fail (private->colormap != NULL);
+ g_return_if_fail (GIMP_IS_PALETTE (private->palette));
+
+ g_clear_pointer (&private->colormap, g_free);
+ g_clear_object (&private->palette);
+
+ /* don't touch the image's babl_palettes because we might still have
+ * buffers with that palette on the undo stack, and on undoing the
+ * image back to indexed, we must have exactly these palettes around
+ */
+}
+
+const Babl *
+gimp_image_colormap_get_rgb_format (GimpImage *image)
+{
+ g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
+
+ return GIMP_IMAGE_GET_PRIVATE (image)->babl_palette_rgb;
+}
+
+const Babl *
+gimp_image_colormap_get_rgba_format (GimpImage *image)
+{
+ g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
+
+ return GIMP_IMAGE_GET_PRIVATE (image)->babl_palette_rgba;
+}
+
+GimpPalette *
+gimp_image_get_colormap_palette (GimpImage *image)
+{
+ g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
+
+ return GIMP_IMAGE_GET_PRIVATE (image)->palette;
+}
+
+const guchar *
+gimp_image_get_colormap (GimpImage *image)
+{
+ g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
+
+ return GIMP_IMAGE_GET_PRIVATE (image)->colormap;
+}
+
+gint
+gimp_image_get_colormap_size (GimpImage *image)
+{
+ g_return_val_if_fail (GIMP_IS_IMAGE (image), 0);
+
+ return GIMP_IMAGE_GET_PRIVATE (image)->n_colors;
+}
+
+void
+gimp_image_set_colormap (GimpImage *image,
+ const guchar *colormap,
+ gint n_colors,
+ gboolean push_undo)
+{
+ GimpImagePrivate *private;
+ GimpPaletteEntry *entry;
+ gint i;
+
+ g_return_if_fail (GIMP_IS_IMAGE (image));
+ g_return_if_fail (colormap != NULL || n_colors == 0);
+ g_return_if_fail (n_colors >= 0 && n_colors <= 256);
+
+ private = GIMP_IMAGE_GET_PRIVATE (image);
+
+ if (push_undo)
+ gimp_image_undo_push_image_colormap (image, C_("undo-type", "Set Colormap"));
+
+ if (private->colormap)
+ memset (private->colormap, 0, GIMP_IMAGE_COLORMAP_SIZE);
+ else
+ gimp_image_colormap_init (image);
+
+ if (colormap)
+ memcpy (private->colormap, colormap, n_colors * 3);
+
+ /* make sure the image's colormap always has at least one color. when
+ * n_colors == 0, use black.
+ */
+ private->n_colors = MAX (n_colors, 1);
+
+ gimp_data_freeze (GIMP_DATA (private->palette));
+
+ while ((entry = gimp_palette_get_entry (private->palette, 0)))
+ gimp_palette_delete_entry (private->palette, entry);
+
+ for (i = 0; i < private->n_colors; i++)
+ gimp_image_colormap_set_palette_entry (image, NULL, i);
+
+ gimp_data_thaw (GIMP_DATA (private->palette));
+
+ gimp_image_colormap_changed (image, -1);
+}
+
+void
+gimp_image_unset_colormap (GimpImage *image,
+ gboolean push_undo)
+{
+ GimpImagePrivate *private;
+
+ g_return_if_fail (GIMP_IS_IMAGE (image));
+
+ private = GIMP_IMAGE_GET_PRIVATE (image);
+
+ if (push_undo)
+ gimp_image_undo_push_image_colormap (image,
+ C_("undo-type", "Unset Colormap"));
+
+ if (private->colormap)
+ {
+ gimp_image_colormap_dispose (image);
+ gimp_image_colormap_free (image);
+ }
+
+ private->n_colors = 0;
+
+ gimp_image_colormap_changed (image, -1);
+}
+
+void
+gimp_image_get_colormap_entry (GimpImage *image,
+ gint color_index,
+ GimpRGB *color)
+{
+ GimpImagePrivate *private;
+
+ g_return_if_fail (GIMP_IS_IMAGE (image));
+
+ private = GIMP_IMAGE_GET_PRIVATE (image);
+
+ g_return_if_fail (private->colormap != NULL);
+ g_return_if_fail (color_index >= 0 && color_index < private->n_colors);
+ g_return_if_fail (color != NULL);
+
+ gimp_rgba_set_uchar (color,
+ private->colormap[color_index * 3],
+ private->colormap[color_index * 3 + 1],
+ private->colormap[color_index * 3 + 2],
+ 255);
+}
+
+void
+gimp_image_set_colormap_entry (GimpImage *image,
+ gint color_index,
+ const GimpRGB *color,
+ gboolean push_undo)
+{
+ GimpImagePrivate *private;
+
+ g_return_if_fail (GIMP_IS_IMAGE (image));
+
+ private = GIMP_IMAGE_GET_PRIVATE (image);
+
+ g_return_if_fail (private->colormap != NULL);
+ g_return_if_fail (color_index >= 0 && color_index < private->n_colors);
+ g_return_if_fail (color != NULL);
+
+ if (push_undo)
+ gimp_image_undo_push_image_colormap (image,
+ C_("undo-type", "Change Colormap entry"));
+
+ gimp_rgb_get_uchar (color,
+ &private->colormap[color_index * 3],
+ &private->colormap[color_index * 3 + 1],
+ &private->colormap[color_index * 3 + 2]);
+
+ if (private->palette)
+ gimp_image_colormap_set_palette_entry (image, color, color_index);
+
+ gimp_image_colormap_changed (image, color_index);
+}
+
+void
+gimp_image_add_colormap_entry (GimpImage *image,
+ const GimpRGB *color)
+{
+ GimpImagePrivate *private;
+
+ g_return_if_fail (GIMP_IS_IMAGE (image));
+
+ private = GIMP_IMAGE_GET_PRIVATE (image);
+
+ g_return_if_fail (private->colormap != NULL);
+ g_return_if_fail (private->n_colors < 256);
+ g_return_if_fail (color != NULL);
+
+ gimp_image_undo_push_image_colormap (image,
+ C_("undo-type", "Add Color to Colormap"));
+
+ gimp_rgb_get_uchar (color,
+ &private->colormap[private->n_colors * 3],
+ &private->colormap[private->n_colors * 3 + 1],
+ &private->colormap[private->n_colors * 3 + 2]);
+
+ private->n_colors++;
+
+ if (private->palette)
+ gimp_image_colormap_set_palette_entry (image, color, private->n_colors - 1);
+
+ gimp_image_colormap_changed (image, -1);
+}
+
+
+/* private functions */
+
+static void
+gimp_image_colormap_set_palette_entry (GimpImage *image,
+ const GimpRGB *c,
+ gint index)
+{
+ GimpImagePrivate *private = GIMP_IMAGE_GET_PRIVATE (image);
+ GimpRGB color;
+ gchar name[64];
+
+ /* Avoid converting to char then back to double if we have the
+ * original GimpRGB color.
+ */
+ if (c)
+ color = *c;
+ else
+ gimp_rgba_set_uchar (&color,
+ private->colormap[3 * index + 0],
+ private->colormap[3 * index + 1],
+ private->colormap[3 * index + 2],
+ 255);
+
+ g_snprintf (name, sizeof (name), "#%d", index);
+
+ if (gimp_palette_get_n_colors (private->palette) < private->n_colors)
+ gimp_palette_add_entry (private->palette, index, name, &color);
+ else
+ gimp_palette_set_entry (private->palette, index, name, &color);
+}
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