mirror of https://github.com/GNOME/gimp.git
187 lines
4.2 KiB
C
187 lines
4.2 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* color-history.c
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* Copyright (C) 2002 Michael Natterer <mitch@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 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 <gtk/gtk.h>
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#include "libgimpcolor/gimpcolor.h"
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#include "gui-types.h"
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#include "config/gimpconfigwriter.h"
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#include "color-history.h"
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#define COLOR_HISTORY_SIZE 16
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static void color_history_init (void);
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static GimpRGB color_history[COLOR_HISTORY_SIZE];
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static gboolean color_history_initialized = FALSE;
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void
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color_history_add_from_rc (GimpRGB *color)
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{
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static gint index = 0;
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if (! color_history_initialized)
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color_history_init ();
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if (color && index < COLOR_HISTORY_SIZE)
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{
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color_history[index++] = *color;
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}
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}
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void
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color_history_write (GimpConfigWriter *writer)
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{
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gint i;
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if (! color_history_initialized)
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color_history_init ();
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gimp_config_writer_open (writer, "color-history");
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for (i = 0; i < COLOR_HISTORY_SIZE; i++)
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{
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gchar buf[4][G_ASCII_DTOSTR_BUF_SIZE];
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g_ascii_formatd (buf[0],
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G_ASCII_DTOSTR_BUF_SIZE, "%f", color_history[i].r);
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g_ascii_formatd (buf[1],
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G_ASCII_DTOSTR_BUF_SIZE, "%f", color_history[i].g);
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g_ascii_formatd (buf[2],
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G_ASCII_DTOSTR_BUF_SIZE, "%f", color_history[i].b);
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g_ascii_formatd (buf[3],
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G_ASCII_DTOSTR_BUF_SIZE, "%f", color_history[i].a);
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gimp_config_writer_open (writer, "color-rgba");
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gimp_config_writer_printf (writer, "%s %s %s %s",
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buf[0], buf[1], buf[2], buf[3]);
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gimp_config_writer_close (writer);
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}
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gimp_config_writer_close (writer);
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}
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void
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color_history_set (gint index,
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const GimpRGB *rgb)
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{
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g_return_if_fail (index >= 0);
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g_return_if_fail (index < COLOR_HISTORY_SIZE);
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g_return_if_fail (rgb != NULL);
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if (! color_history_initialized)
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color_history_init ();
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color_history[index] = *rgb;
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}
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void
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color_history_get (gint index,
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GimpRGB *rgb)
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{
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g_return_if_fail (index >= 0);
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g_return_if_fail (index < COLOR_HISTORY_SIZE);
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g_return_if_fail (rgb != NULL);
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if (! color_history_initialized)
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color_history_init ();
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*rgb = color_history[index];
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}
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gint
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color_history_add (const GimpRGB *rgb)
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{
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gint shift_begin = -1;
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gint i, j;
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g_return_val_if_fail (rgb != NULL, 0);
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if (! color_history_initialized)
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color_history_init ();
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/* is the added color already there? */
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for (i = 0; i < COLOR_HISTORY_SIZE; i++)
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{
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if (gimp_rgba_distance (&color_history[i], rgb) < 0.0001)
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{
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shift_begin = i;
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goto doit;
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}
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}
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/* if not, are there two equal colors? */
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if (shift_begin == -1)
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{
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for (i = 0; i < COLOR_HISTORY_SIZE; i++)
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{
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for (j = i + 1; j < COLOR_HISTORY_SIZE; j++)
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{
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if (gimp_rgba_distance (&color_history[i],
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&color_history[j]) < 0.0001)
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{
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shift_begin = i;
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goto doit;
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}
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}
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}
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}
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/* if not, shift them all */
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if (shift_begin == -1)
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shift_begin = COLOR_HISTORY_SIZE - 1;
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doit:
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for (i = shift_begin; i > 0; i--)
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color_history[i] = color_history[i - 1];
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color_history[0] = *rgb;
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return shift_begin;
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}
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/* private functions */
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static void
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color_history_init (void)
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{
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gint i;
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for (i = 0; i < COLOR_HISTORY_SIZE; i++)
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gimp_rgba_set (&color_history[i], 1.0, 1.0, 1.0, GIMP_OPACITY_OPAQUE);
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color_history_initialized = TRUE;
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}
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