mirror of https://github.com/GNOME/gimp.git
509 lines
14 KiB
C
509 lines
14 KiB
C
/* GIMP - The GNU Image Manipulation Program
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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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <string.h>
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#include <glib-object.h>
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#include "libgimpbase/gimpbase.h"
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#include "libgimpcolor/gimpcolor.h"
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#include "core-types.h"
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#include "base/temp-buf.h"
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#include "gimp-utils.h"
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#include "gimppalette.h"
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#include "gimppalette-load.h"
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#include "gimppalette-save.h"
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#include "gimp-intl.h"
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#define EPSILON 1e-10
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/* local function prototypes */
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static void gimp_palette_finalize (GObject *object);
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static gint64 gimp_palette_get_memsize (GimpObject *object,
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gint64 *gui_size);
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static void gimp_palette_get_preview_size (GimpViewable *viewable,
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gint size,
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gboolean popup,
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gboolean dot_for_dot,
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gint *width,
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gint *height);
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static gboolean gimp_palette_get_popup_size (GimpViewable *viewable,
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gint width,
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gint height,
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gboolean dot_for_dot,
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gint *popup_width,
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gint *popup_height);
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static TempBuf * gimp_palette_get_new_preview (GimpViewable *viewable,
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GimpContext *context,
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gint width,
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gint height);
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static gchar * gimp_palette_get_description (GimpViewable *viewable,
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gchar **tooltip);
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static const gchar * gimp_palette_get_extension (GimpData *data);
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static GimpData * gimp_palette_duplicate (GimpData *data);
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static void gimp_palette_entry_free (GimpPaletteEntry *entry);
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static gint64 gimp_palette_entry_get_memsize (GimpPaletteEntry *entry,
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gint64 *gui_size);
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G_DEFINE_TYPE (GimpPalette, gimp_palette, GIMP_TYPE_DATA)
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#define parent_class gimp_palette_parent_class
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static void
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gimp_palette_class_init (GimpPaletteClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
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GimpViewableClass *viewable_class = GIMP_VIEWABLE_CLASS (klass);
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GimpDataClass *data_class = GIMP_DATA_CLASS (klass);
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object_class->finalize = gimp_palette_finalize;
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gimp_object_class->get_memsize = gimp_palette_get_memsize;
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viewable_class->default_stock_id = "gtk-select-color";
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viewable_class->get_preview_size = gimp_palette_get_preview_size;
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viewable_class->get_popup_size = gimp_palette_get_popup_size;
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viewable_class->get_new_preview = gimp_palette_get_new_preview;
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viewable_class->get_description = gimp_palette_get_description;
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data_class->save = gimp_palette_save;
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data_class->get_extension = gimp_palette_get_extension;
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data_class->duplicate = gimp_palette_duplicate;
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}
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static void
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gimp_palette_init (GimpPalette *palette)
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{
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palette->colors = NULL;
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palette->n_colors = 0;
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palette->n_columns = 0;
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}
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static void
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gimp_palette_finalize (GObject *object)
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{
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GimpPalette *palette = GIMP_PALETTE (object);
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if (palette->colors)
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{
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g_list_foreach (palette->colors, (GFunc) gimp_palette_entry_free, NULL);
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g_list_free (palette->colors);
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palette->colors = NULL;
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}
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static gint64
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gimp_palette_get_memsize (GimpObject *object,
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gint64 *gui_size)
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{
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GimpPalette *palette = GIMP_PALETTE (object);
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gint64 memsize = 0;
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memsize += gimp_g_list_get_memsize_foreach (palette->colors,
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(GimpMemsizeFunc)
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gimp_palette_entry_get_memsize,
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gui_size);
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return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
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gui_size);
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}
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static void
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gimp_palette_get_preview_size (GimpViewable *viewable,
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gint size,
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gboolean popup,
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gboolean dot_for_dot,
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gint *width,
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gint *height)
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{
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*width = size;
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*height = 1 + size / 2;
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}
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static gboolean
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gimp_palette_get_popup_size (GimpViewable *viewable,
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gint width,
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gint height,
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gboolean dot_for_dot,
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gint *popup_width,
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gint *popup_height)
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{
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GimpPalette *palette = GIMP_PALETTE (viewable);
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gint p_width;
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gint p_height;
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if (! palette->n_colors)
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return FALSE;
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if (palette->n_columns)
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p_width = palette->n_columns;
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else
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p_width = MIN (palette->n_colors, 16);
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p_height = MAX (1, palette->n_colors / p_width);
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if (p_width * 4 > width || p_height * 4 > height)
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{
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*popup_width = p_width * 4;
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*popup_height = p_height * 4;
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return TRUE;
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}
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return FALSE;
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}
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static TempBuf *
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gimp_palette_get_new_preview (GimpViewable *viewable,
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GimpContext *context,
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gint width,
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gint height)
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{
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GimpPalette *palette = GIMP_PALETTE (viewable);
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TempBuf *temp_buf;
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guchar *buf;
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guchar *b;
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GList *list;
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guchar white[3] = { 255, 255, 255 };
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gint columns;
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gint rows;
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gint cell_size;
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gint x, y;
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temp_buf = temp_buf_new (width, height, 3, 0, 0, white);
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if (palette->n_columns > 1)
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cell_size = MAX (4, width / palette->n_columns);
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else
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cell_size = 4;
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columns = width / cell_size;
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rows = height / cell_size;
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buf = temp_buf_data (temp_buf);
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b = g_new (guchar, width * 3);
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list = palette->colors;
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for (y = 0; y < rows && list; y++)
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{
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gint i;
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memset (b, 255, width * 3);
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for (x = 0; x < columns && list; x++)
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{
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GimpPaletteEntry *entry = list->data;
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list = g_list_next (list);
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gimp_rgb_get_uchar (&entry->color,
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&b[x * cell_size * 3 + 0],
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&b[x * cell_size * 3 + 1],
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&b[x * cell_size * 3 + 2]);
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for (i = 1; i < cell_size; i++)
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{
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b[(x * cell_size + i) * 3 + 0] = b[(x * cell_size) * 3 + 0];
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b[(x * cell_size + i) * 3 + 1] = b[(x * cell_size) * 3 + 1];
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b[(x * cell_size + i) * 3 + 2] = b[(x * cell_size) * 3 + 2];
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}
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}
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for (i = 0; i < cell_size; i++)
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memcpy (buf + ((y * cell_size + i) * width) * 3, b, width * 3);
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}
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g_free (b);
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return temp_buf;
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}
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static gchar *
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gimp_palette_get_description (GimpViewable *viewable,
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gchar **tooltip)
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{
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GimpPalette *palette = GIMP_PALETTE (viewable);
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return g_strdup_printf ("%s (%d)",
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GIMP_OBJECT (palette)->name,
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palette->n_colors);
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}
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GimpData *
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gimp_palette_new (const gchar *name)
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{
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g_return_val_if_fail (name != NULL, NULL);
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g_return_val_if_fail (*name != '\0', NULL);
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return g_object_new (GIMP_TYPE_PALETTE,
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"name", name,
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NULL);
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}
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GimpData *
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gimp_palette_get_standard (void)
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{
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static GimpData *standard_palette = NULL;
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if (! standard_palette)
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{
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standard_palette = gimp_palette_new ("Standard");
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standard_palette->dirty = FALSE;
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gimp_data_make_internal (standard_palette);
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g_object_ref (standard_palette);
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}
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return standard_palette;
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}
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static const gchar *
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gimp_palette_get_extension (GimpData *data)
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{
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return GIMP_PALETTE_FILE_EXTENSION;
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}
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static GimpData *
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gimp_palette_duplicate (GimpData *data)
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{
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GimpPalette *palette = GIMP_PALETTE (data);
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GimpPalette *new;
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GList *list;
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new = g_object_new (GIMP_TYPE_PALETTE, NULL);
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new->n_columns = palette->n_columns;
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for (list = palette->colors; list; list = g_list_next (list))
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{
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GimpPaletteEntry *entry = list->data;
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gimp_palette_add_entry (new, -1, entry->name, &entry->color);
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}
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return GIMP_DATA (new);
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}
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GimpPaletteEntry *
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gimp_palette_add_entry (GimpPalette *palette,
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gint position,
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const gchar *name,
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const GimpRGB *color)
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{
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GimpPaletteEntry *entry;
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g_return_val_if_fail (GIMP_IS_PALETTE (palette), NULL);
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g_return_val_if_fail (color != NULL, NULL);
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entry = g_slice_new0 (GimpPaletteEntry);
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entry->color = *color;
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entry->name = g_strdup (name ? name : _("Untitled"));
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if (position < 0 || position >= palette->n_colors)
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{
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entry->position = palette->n_colors;
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palette->colors = g_list_append (palette->colors, entry);
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}
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else
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{
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GList *list;
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entry->position = position;
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palette->colors = g_list_insert (palette->colors, entry, position);
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/* renumber the displaced entries */
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for (list = g_list_nth (palette->colors, position + 1);
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list;
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list = g_list_next (list))
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{
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GimpPaletteEntry *entry2 = list->data;
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entry2->position += 1;
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}
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}
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palette->n_colors += 1;
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gimp_data_dirty (GIMP_DATA (palette));
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return entry;
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}
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void
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gimp_palette_delete_entry (GimpPalette *palette,
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GimpPaletteEntry *entry)
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{
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GList *list;
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gint pos = 0;
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g_return_if_fail (GIMP_IS_PALETTE (palette));
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g_return_if_fail (entry != NULL);
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if (g_list_find (palette->colors, entry))
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{
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pos = entry->position;
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gimp_palette_entry_free (entry);
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palette->colors = g_list_remove (palette->colors, entry);
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palette->n_colors--;
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for (list = g_list_nth (palette->colors, pos);
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list;
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list = g_list_next (list))
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{
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entry = (GimpPaletteEntry *) list->data;
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entry->position = pos++;
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}
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gimp_data_dirty (GIMP_DATA (palette));
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}
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}
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void
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gimp_palette_set_columns (GimpPalette *palette,
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gint columns)
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{
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g_return_if_fail (GIMP_IS_PALETTE (palette));
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columns = CLAMP (columns, 0, 64);
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if (palette->n_columns != columns)
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{
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palette->n_columns = columns;
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gimp_data_dirty (GIMP_DATA (palette));
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}
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}
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gint
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gimp_palette_get_columns (GimpPalette *palette)
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{
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g_return_val_if_fail (GIMP_IS_PALETTE (palette), 0);
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return palette->n_columns;
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}
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GimpPaletteEntry *
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gimp_palette_find_entry (GimpPalette *palette,
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const GimpRGB *color,
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GimpPaletteEntry *start_from)
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{
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GimpPaletteEntry *entry;
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g_return_val_if_fail (GIMP_IS_PALETTE (palette), NULL);
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g_return_val_if_fail (color != NULL, NULL);
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if (! start_from)
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{
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GList *list;
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/* search from the start */
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for (list = palette->colors; list; list = g_list_next (list))
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{
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entry = (GimpPaletteEntry *) list->data;
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if (gimp_rgb_distance (&entry->color, color) < EPSILON)
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return entry;
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}
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}
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else if (gimp_rgb_distance (&start_from->color, color) < EPSILON)
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{
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return start_from;
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}
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else
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{
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GList *old = g_list_find (palette->colors, start_from);
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GList *next;
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GList *prev;
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g_return_val_if_fail (old != NULL, NULL);
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next = old->next;
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prev = old->prev;
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/* proximity-based search */
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while (next || prev)
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{
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if (next)
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{
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entry = (GimpPaletteEntry *) next->data;
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if (gimp_rgb_distance (&entry->color, color) < EPSILON)
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return entry;
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next = next->next;
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}
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if (prev)
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{
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entry = (GimpPaletteEntry *) prev->data;
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if (gimp_rgb_distance (&entry->color, color) < EPSILON)
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return entry;
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prev = prev->prev;
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}
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}
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}
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return NULL;
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}
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/* private functions */
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static void
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gimp_palette_entry_free (GimpPaletteEntry *entry)
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{
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g_return_if_fail (entry != NULL);
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g_free (entry->name);
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g_slice_free (GimpPaletteEntry, entry);
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}
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static gint64
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gimp_palette_entry_get_memsize (GimpPaletteEntry *entry,
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gint64 *gui_size)
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{
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gint64 memsize = sizeof (GimpPaletteEntry);
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memsize += gimp_string_get_memsize (entry->name);
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return memsize;
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}
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