lib/color.h

   1 /* Dia -- an diagram creation/manipulation program
   2  * Copyright (C) 1998 Alexander Larsson
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  */
  18
  19 /** \file color.h Diagram and object tinting */
  20
  21 #ifndef COLOR_H
  22 #define COLOR_H
  23
  24 #include "diatypes.h"
  25 #include <gdk/gdk.h>
  26 #include "diavar.h"
  27
  28 struct _Color {
  29   float red;
  30   float green;
  31   float blue;
  32 };
  33
  34 void color_init(void);
  35 Color *color_new_rgb(float r, float g, float b);
  36 void color_convert(Color *color, GdkColor *gdkcolor);
  37 gboolean color_equals(Color *color1, Color *color2);
  38
  39 #ifdef G_OS_WIN32
  40 static Color color_black = { 0.0f, 0.0f, 0.0f };
  41 static Color color_white = { 1.0f, 1.0f, 1.0f };
  42 #else
  43 DIAVAR Color color_black, color_white;
  44 #endif
  45 DIAVAR GdkColor color_gdk_black, color_gdk_white;
  46
  47 #define DIA_COLOR_TO_GDK(from, to) \
  48 (to).pixel = 0; \
  49 (to).red = (from).red*65535; \
  50 (to).green = (from).green*65535; \
  51 (to).blue = (from).blue*65535;
  52 #define GDK_COLOR_TO_DIA(from, to) \
  53 (to).red = (from).red/65535.0; \
  54 (to).green = (from).green/65535.0; \
  55 (to).blue = (from).blue/65535.0;
  56
  57 #endif /* COLOR_H */