--- /dev/null
+/* GDK - The GIMP Drawing Kit
+ * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
+ * file for a list of people on the GTK+ Team. See the ChangeLog
+ * files for a list of changes. These files are distributed with
+ * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
+ */
+
+#include "config.h"
+#include "gdkrgba.h"
+#include <string.h>
+
+/**
+ * SECTION:rgba_colors
+ * @Short_description: RGBA colors
+ * @Title: RGBA Colors
+ */
+
+G_DEFINE_BOXED_TYPE (GdkRGBA, gdk_rgba,
+ gdk_rgba_copy, gdk_rgba_free)
+
+/**
+ * gdk_rgba_copy:
+ * @rgba: a #GdkRGBA
+ *
+ * Makes a copy of a #GdkRGBA structure, the result must be freed
+ * through gdk_rgba_free().
+ *
+ * Returns: A newly allocated #GdkRGBA
+ **/
+GdkRGBA *
+gdk_rgba_copy (GdkRGBA *rgba)
+{
+ GdkRGBA *copy;
+
+ copy = g_slice_new (GdkRGBA);
+ copy->red = rgba->red;
+ copy->green = rgba->green;
+ copy->blue = rgba->blue;
+ copy->alpha = rgba->alpha;
+
+ return copy;
+}
+
+/**
+ * gdk_rgba_free:
+ * @rgba: a #GdkRGBA
+ *
+ * Frees a #GdkRGBA struct created with gdk_rgba_copy()
+ **/
+void
+gdk_rgba_free (GdkRGBA *rgba)
+{
+ g_slice_free (GdkRGBA, rgba);
+}
+
+/**
+ * gdk_rgba_parse:
+ * @spec: the string specifying the color
+ * @rgba: the #GdkRGBA struct to fill in
+ *
+ * Parses a textual representation of a color, filling in
+ * the <structfield>red</structfield>, <structfield>green</structfield>,
+ * <structfield>blue</structfield> and <structfield>alpha</structfield>
+ * fields of the @rgba struct.
+ *
+ * The string can be either one of:
+ * <itemizedlist>
+ * <listitem>
+ * A standard name (Taken from the X11 rgb.txt file).
+ * </listitem>
+ * <listitem>
+ * A hex value in the form '#rgb' '#rrggbb' '#rrrgggbbb' or '#rrrrggggbbbb'
+ * </listitem>
+ * <listitem>
+ * A RGB color in the form 'rgb(r,g,b)' (In this case the color will
+ * have full opacity)
+ * </listitem>
+ * <listitem>
+ * A RGBA color in the form 'rgba(r,g,b,a)'
+ * </listitem>
+ * </itemizedlist>
+ *
+ * Where 'r', 'g', 'b' and 'a' are respectively the red, green, blue and
+ * alpha color values, parsed in the last 2 cases as double numbers in
+ * the range [0..1], any other value out of that range will be clamped.
+ *
+ * Returns: %TRUE if the parsing succeeded
+ **/
+gboolean
+gdk_rgba_parse (const gchar *spec,
+ GdkRGBA *rgba)
+{
+ gboolean has_alpha;
+ gdouble r, g, b, a;
+ gchar *str = (gchar *) spec;
+
+#define SKIP_WHITESPACES(s) while (*(s) == ' ') (s)++;
+
+ if (strncmp (str, "rgba", 4) == 0)
+ {
+ has_alpha = TRUE;
+ str += 4;
+ }
+ else if (strncmp (str, "rgb", 3) == 0)
+ {
+ has_alpha = FALSE;
+ a = 1;
+ str += 3;
+ }
+ else
+ {
+ PangoColor pango_color;
+
+ /* Resort on PangoColor for rgb.txt color
+ * map and '#' prefixed colors */
+ if (pango_color_parse (&pango_color, str))
+ {
+ if (rgba)
+ {
+ rgba->red = pango_color.red / 65535.;
+ rgba->green = pango_color.green / 65535.;
+ rgba->blue = pango_color.blue / 65535.;
+ rgba->alpha = 1;
+ }
+
+ return TRUE;
+ }
+ else
+ return FALSE;
+ }
+
+ SKIP_WHITESPACES (str);
+
+ if (*str != '(')
+ return FALSE;
+
+ str++;
+
+ /* Parse red */
+ SKIP_WHITESPACES (str);
+ r = g_ascii_strtod (str, &str);
+ SKIP_WHITESPACES (str);
+
+ if (*str != ',')
+ return FALSE;
+
+ str++;
+
+ /* Parse green */
+ SKIP_WHITESPACES (str);
+ g = g_ascii_strtod (str, &str);
+ SKIP_WHITESPACES (str);
+
+ if (*str != ',')
+ return FALSE;
+
+ str++;
+
+ /* Parse blue */
+ SKIP_WHITESPACES (str);
+ b = g_ascii_strtod (str, &str);
+ SKIP_WHITESPACES (str);
+
+ if (has_alpha)
+ {
+ if (*str != ',')
+ return FALSE;
+
+ str++;
+
+ SKIP_WHITESPACES (str);
+ a = g_ascii_strtod (str, &str);
+ SKIP_WHITESPACES (str);
+ }
+
+ if (*str != ')')
+ return FALSE;
+
+#undef SKIP_WHITESPACES
+
+ if (rgba)
+ {
+ rgba->red = CLAMP (r, 0, 1);
+ rgba->green = CLAMP (g, 0, 1);
+ rgba->blue = CLAMP (b, 0, 1);
+ rgba->alpha = CLAMP (a, 0, 1);
+ }
+
+ return TRUE;
+}
+
+/**
+ * gdk_rgba_hash:
+ * @p: a #GdkRGBA pointer.
+ *
+ * A hash function suitable for using for a hash
+ * table that stores #GdkRGBA<!-- -->s.
+ *
+ * Return value: The hash function applied to @p
+ **/
+guint
+gdk_rgba_hash (gconstpointer p)
+{
+ const GdkRGBA *rgba = p;
+
+ return ((guint) (rgba->red * 65535) +
+ ((guint) (rgba->green * 65535) << 11) +
+ ((guint) (rgba->blue * 65535) << 22) +
+ ((guint) (rgba->alpha * 65535) >> 6));
+}
+
+/**
+ * gdk_rgba_equal:
+ * @p1: a #GdkRGBA pointer.
+ * @p2: another #GdkRGBA pointer.
+ *
+ * Compares two RGBA colors.
+ *
+ * Return value: %TRUE if the two colors compare equal
+ **/
+gboolean
+gdk_rgba_equal (gconstpointer p1,
+ gconstpointer p2)
+{
+ const GdkRGBA *rgba1, *rgba2;
+
+ rgba1 = p1;
+ rgba2 = p2;
+
+ if (rgba1->red == rgba2->red &&
+ rgba1->green == rgba2->green &&
+ rgba1->blue == rgba2->blue &&
+ rgba1->alpha == rgba2->alpha)
+ return TRUE;
+
+ return FALSE;
+}
+
+/**
+ * gdk_rgba_to_string:
+ * @rgba: a #GdkRGBA
+ *
+ * Returns a textual specification of @rgba in the form
+ * <literal>rgba (r, g, b, a)</literal>, where 'r', 'g',
+ * 'b' and 'a' represent the red, green, blue and alpha
+ * values respectively.
+ *
+ * Returns: A newly allocated text string
+ **/
+gchar *
+gdk_rgba_to_string (GdkRGBA *rgba)
+{
+ return g_strdup_printf ("rgba(%f,%f,%f,%f)",
+ CLAMP (rgba->red, 0, 1),
+ CLAMP (rgba->green, 0, 1),
+ CLAMP (rgba->blue, 0, 1),
+ CLAMP (rgba->alpha, 0, 1));
+}
--- /dev/null
+/* GDK - The GIMP Drawing Kit
+ * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
+ * file for a list of people on the GTK+ Team. See the ChangeLog
+ * files for a list of changes. These files are distributed with
+ * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
+ */
+
+#if !defined (__GDK_H_INSIDE__) && !defined (GDK_COMPILATION)
+#error "Only <gdk/gdk.h> can be included directly."
+#endif
+
+#ifndef __GDK_RGBA_H__
+#define __GDK_RGBA_H__
+
+#include <gdk/gdktypes.h>
+
+G_BEGIN_DECLS
+
+struct _GdkRGBA
+{
+ gdouble red;
+ gdouble green;
+ gdouble blue;
+ gdouble alpha;
+};
+
+#define GDK_TYPE_RGBA (gdk_rgba_get_type ())
+
+GdkRGBA * gdk_rgba_copy (GdkRGBA *rgba);
+void gdk_rgba_free (GdkRGBA *rgba);
+
+gboolean gdk_rgba_parse (const gchar *spec,
+ GdkRGBA *rgba);
+
+guint gdk_rgba_hash (gconstpointer p);
+gboolean gdk_rgba_equal (gconstpointer p1,
+ gconstpointer p2);
+
+gchar * gdk_rgba_to_string (GdkRGBA *rgba);
+
+GType gdk_rgba_get_type (void) G_GNUC_CONST;
+
+
+G_END_DECLS
+
+#endif /* __GDK_RGBA_H__ */
projects / gtk4.git / commitdiff