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122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
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/* eel-gdk-extensions.c: Graphics routines to augment what's in gdk.
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Copyright (C) 1999, 2000 Eazel, Inc.
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The Gnome Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The Gnome 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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the Gnome Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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Authors: Darin Adler <darin@eazel.com>,
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Pavel Cisler <pavel@eazel.com>,
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Ramiro Estrugo <ramiro@eazel.com>
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*/
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#include <config.h>
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#include "eel-gdk-extensions.h"
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#include "eel-glib-extensions.h"
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#include "eel-string.h"
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <gdk/gdk.h>
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#include <gdk/gdkx.h>
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#include <stdlib.h>
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#include <pango/pango.h>
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/**
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* eel_gdk_rgba_is_dark:
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*
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* Return true if the given color is `dark'
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*/
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gboolean
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eel_gdk_rgba_is_dark (const GdkRGBA *color)
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{
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int intensity;
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intensity = ((((int) (color->red) >> 8) * 77)
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+ (((int) (color->green) >> 8) * 150)
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+ (((int) (color->blue) >> 8) * 28)) >> 8;
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return intensity < 128;
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}
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EelGdkGeometryFlags
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eel_gdk_parse_geometry (const char *string, int *x_return, int *y_return,
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guint *width_return, guint *height_return)
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{
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int x11_flags;
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EelGdkGeometryFlags gdk_flags;
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g_return_val_if_fail (string != NULL, EEL_GDK_NO_VALUE);
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g_return_val_if_fail (x_return != NULL, EEL_GDK_NO_VALUE);
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g_return_val_if_fail (y_return != NULL, EEL_GDK_NO_VALUE);
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g_return_val_if_fail (width_return != NULL, EEL_GDK_NO_VALUE);
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g_return_val_if_fail (height_return != NULL, EEL_GDK_NO_VALUE);
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x11_flags = XParseGeometry (string, x_return, y_return,
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width_return, height_return);
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gdk_flags = EEL_GDK_NO_VALUE;
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if (x11_flags & XValue) {
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gdk_flags |= EEL_GDK_X_VALUE;
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}
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if (x11_flags & YValue) {
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gdk_flags |= EEL_GDK_Y_VALUE;
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}
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if (x11_flags & WidthValue) {
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gdk_flags |= EEL_GDK_WIDTH_VALUE;
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}
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if (x11_flags & HeightValue) {
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gdk_flags |= EEL_GDK_HEIGHT_VALUE;
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}
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if (x11_flags & XNegative) {
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gdk_flags |= EEL_GDK_X_NEGATIVE;
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}
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if (x11_flags & YNegative) {
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gdk_flags |= EEL_GDK_Y_NEGATIVE;
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}
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return gdk_flags;
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}
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#define CLAMP_COLOR(v) (t = (v), CLAMP (t, 0, 1))
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#define SATURATE(v) ((1.0 - saturation) * intensity + saturation * (v))
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void
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eel_make_color_inactive (GdkRGBA *color)
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{
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double intensity, saturation;
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gdouble t;
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saturation = 0.7;
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intensity = color->red * 0.30 + color->green * 0.59 + color->blue * 0.11;
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color->red = SATURATE (color->red);
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color->green = SATURATE (color->green);
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color->blue = SATURATE (color->blue);
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if (intensity > 0.5) {
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color->red *= 0.9;
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color->green *= 0.9;
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color->blue *= 0.9;
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} else {
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color->red *= 1.25;
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color->green *= 1.25;
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color->blue *= 1.25;
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}
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color->red = CLAMP_COLOR (color->red);
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color->green = CLAMP_COLOR (color->green);
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color->blue = CLAMP_COLOR (color->blue);
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}
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