394 lines
9.1 KiB
C
394 lines
9.1 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include <config.h>
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#include <time.h>
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#include "gdkscreen.h"
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#include "gdkcolor.h"
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#include "gdkinternals.h"
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#include "gdkalias.h"
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/**
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* gdk_colormap_ref:
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* @cmap: a #GdkColormap
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*
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* Deprecated function; use g_object_ref() instead.
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*
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* Return value: the colormap
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**/
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GdkColormap*
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gdk_colormap_ref (GdkColormap *cmap)
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{
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return (GdkColormap *) g_object_ref (cmap);
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}
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/**
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* gdk_colormap_unref:
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* @cmap: a #GdkColormap
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*
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* Deprecated function; use g_object_ref() instead.
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**/
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void
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gdk_colormap_unref (GdkColormap *cmap)
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{
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g_object_unref (cmap);
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}
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/**
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* gdk_colormap_get_visual:
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* @colormap: a #GdkColormap.
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*
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* Returns the visual for which a given colormap was created.
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*
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* Return value: the visual of the colormap.
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**/
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GdkVisual *
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gdk_colormap_get_visual (GdkColormap *colormap)
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{
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g_return_val_if_fail (GDK_IS_COLORMAP (colormap), NULL);
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return colormap->visual;
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}
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/**
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* gdk_colors_store:
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* @colormap: a #GdkColormap.
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* @colors: the new color values.
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* @ncolors: the number of colors to change.
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*
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* Changes the value of the first @ncolors colors in
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* a private colormap. This function is obsolete and
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* should not be used. See gdk_color_change().
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**/
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void
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gdk_colors_store (GdkColormap *colormap,
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GdkColor *colors,
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gint ncolors)
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{
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gint i;
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for (i = 0; i < ncolors; i++)
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{
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colormap->colors[i].pixel = colors[i].pixel;
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colormap->colors[i].red = colors[i].red;
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colormap->colors[i].green = colors[i].green;
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colormap->colors[i].blue = colors[i].blue;
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}
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gdk_colormap_change (colormap, ncolors);
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}
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/**
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* gdk_color_copy:
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* @color: a #GdkColor.
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*
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* Makes a copy of a color structure. The result
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* must be freed using gdk_color_free().
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*
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* Return value: a copy of @color.
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**/
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GdkColor*
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gdk_color_copy (const GdkColor *color)
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{
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GdkColor *new_color;
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g_return_val_if_fail (color != NULL, NULL);
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new_color = g_slice_new (GdkColor);
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*new_color = *color;
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return new_color;
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}
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/**
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* gdk_color_free:
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* @color: a #GdkColor.
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*
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* Frees a color structure created with
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* gdk_color_copy().
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**/
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void
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gdk_color_free (GdkColor *color)
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{
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g_return_if_fail (color != NULL);
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g_slice_free (GdkColor, color);
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}
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/**
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* gdk_color_white:
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* @colormap: a #GdkColormap.
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* @color: the location to store the color.
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*
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* Returns the white color for a given colormap. The resulting
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* value has already allocated been allocated.
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*
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* Return value: %TRUE if the allocation succeeded.
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**/
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gboolean
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gdk_color_white (GdkColormap *colormap,
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GdkColor *color)
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{
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gint return_val;
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g_return_val_if_fail (colormap != NULL, FALSE);
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if (color)
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{
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color->red = 65535;
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color->green = 65535;
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color->blue = 65535;
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return_val = gdk_colormap_alloc_color (colormap, color, FALSE, TRUE);
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}
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else
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return_val = FALSE;
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return return_val;
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}
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/**
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* gdk_color_black:
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* @colormap: a #GdkColormap.
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* @color: the location to store the color.
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*
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* Returns the black color for a given colormap. The resulting
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* value has already benn allocated.
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*
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* Return value: %TRUE if the allocation succeeded.
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**/
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gboolean
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gdk_color_black (GdkColormap *colormap,
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GdkColor *color)
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{
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gint return_val;
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g_return_val_if_fail (colormap != NULL, FALSE);
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if (color)
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{
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color->red = 0;
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color->green = 0;
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color->blue = 0;
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return_val = gdk_colormap_alloc_color (colormap, color, FALSE, TRUE);
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}
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else
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return_val = FALSE;
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return return_val;
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}
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/********************
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* Color allocation *
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********************/
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/**
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* gdk_colormap_alloc_color:
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* @colormap: a #GdkColormap.
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* @color: the color to allocate. On return the
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* <structfield>pixel</structfield> field will be
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* filled in if allocation succeeds.
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* @writeable: If %TRUE, the color is allocated writeable
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* (their values can later be changed using gdk_color_change()).
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* Writeable colors cannot be shared between applications.
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* @best_match: If %TRUE, GDK will attempt to do matching against
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* existing colors if the color cannot be allocated as requested.
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*
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* Allocates a single color from a colormap.
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*
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* Return value: %TRUE if the allocation succeeded.
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**/
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gboolean
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gdk_colormap_alloc_color (GdkColormap *colormap,
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GdkColor *color,
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gboolean writeable,
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gboolean best_match)
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{
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gboolean success;
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gdk_colormap_alloc_colors (colormap, color, 1, writeable, best_match,
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&success);
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return success;
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}
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/**
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* gdk_color_alloc:
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* @colormap: a #GdkColormap.
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* @color: The color to allocate. On return, the
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* <structfield>pixel</structfield> field will be filled in.
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*
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* Allocates a single color from a colormap.
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*
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* Return value: %TRUE if the allocation succeeded.
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*
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* Deprecated: Use gdk_colormap_alloc_color() instead.
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**/
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gboolean
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gdk_color_alloc (GdkColormap *colormap,
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GdkColor *color)
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{
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gboolean success;
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gdk_colormap_alloc_colors (colormap, color, 1, FALSE, TRUE, &success);
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return success;
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}
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/**
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* gdk_color_hash:
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* @colora: a #GdkColor.
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*
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* A hash function suitable for using for a hash
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* table that stores #GdkColor's.
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*
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* Return value: The hash function applied to @colora
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**/
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guint
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gdk_color_hash (const GdkColor *colora)
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{
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return ((colora->red) +
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(colora->green << 11) +
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(colora->blue << 22) +
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(colora->blue >> 6));
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}
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/**
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* gdk_color_equal:
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* @colora: a #GdkColor.
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* @colorb: another #GdkColor.
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*
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* Compares two colors.
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*
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* Return value: %TRUE if the two colors compare equal
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**/
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gboolean
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gdk_color_equal (const GdkColor *colora,
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const GdkColor *colorb)
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{
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g_return_val_if_fail (colora != NULL, FALSE);
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g_return_val_if_fail (colorb != NULL, FALSE);
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return ((colora->red == colorb->red) &&
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(colora->green == colorb->green) &&
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(colora->blue == colorb->blue));
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}
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GType
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gdk_color_get_type (void)
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{
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static GType our_type = 0;
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if (our_type == 0)
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our_type = g_boxed_type_register_static (g_intern_static_string ("GdkColor"),
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(GBoxedCopyFunc)gdk_color_copy,
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(GBoxedFreeFunc)gdk_color_free);
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return our_type;
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}
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/**
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* gdk_color_parse:
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* @spec: the string specifying the color.
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* @color: the #GdkColor to fill in
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*
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* Parses a textual specification of a color and fill in
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* the <structfield>red</structfield>,
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* <structfield>green</structfield>, and
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* <structfield>blue</structfield> fields of a
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* #GdkColor structure. The color is <emphasis>not</emphasis>
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* allocated, you must call gdk_colormap_alloc_color() yourself.
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* The text string can be in any of the forms accepted
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* by <function>XParseColor</function>; these include
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* name for a color from <filename>rgb.txt</filename>, such as
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* <literal>DarkSlateGray</literal>, or a hex specification
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* such as <literal>#3050b2</literal> or <literal>#35b</literal>.
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*
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* Return value: %TRUE if the parsing succeeded.
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**/
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gboolean
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gdk_color_parse (const gchar *spec,
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GdkColor *color)
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{
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PangoColor pango_color;
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if (pango_color_parse (&pango_color, spec))
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{
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color->red = pango_color.red;
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color->green = pango_color.green;
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color->blue = pango_color.blue;
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return TRUE;
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}
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else
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return FALSE;
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}
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/**
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* gdk_color_to_string:
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* @color: a #GdkColor
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*
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* Returns a textual specification of @color in the hexadecimal form
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* <literal>#rrrrggggbbbb</literal>, where <literal>r</literal>,
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* <literal>g</literal> and <literal>b</literal> are hex digits
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* representing the red, green and blue components respectively.
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*
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* Return value: a newly-allocated text string
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*
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* Since: 2.12
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**/
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gchar *
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gdk_color_to_string (const GdkColor *color)
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{
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PangoColor pango_color;
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g_return_val_if_fail (color != NULL, NULL);
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pango_color.red = color->red;
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pango_color.green = color->green;
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pango_color.blue = color->blue;
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return pango_color_to_string (&pango_color);
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}
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/**
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* gdk_colormap_get_system:
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*
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* Gets the system's default colormap for the default screen. (See
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* gdk_colormap_get_system_for_screen ())
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*
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* Return value: the default colormap.
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**/
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GdkColormap*
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gdk_colormap_get_system (void)
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{
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return gdk_screen_get_system_colormap (gdk_screen_get_default ());
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}
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#define __GDK_COLOR_C__
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#include "gdkaliasdef.c"
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