/* vim: set sw=8: -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ /* * go-color.h * * Copyright (C) 1999, 2000 EMC Capital Management, Inc. * * Developed by Jon Trowbridge and * Havoc Pennington . * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 * USA */ #ifndef GO_COLOR_H #define GO_COLOR_H #include #include #include #include #ifdef GOFFICE_WITH_GTK #include #endif G_BEGIN_DECLS /* Some convenient macros for drawing into an RGB buffer. Beware of side effects, code-bloat, and all of the other classic cpp-perils... */ #define GDK_TO_UINT(c) RGBA_TO_UINT(((c).red>>8), ((c).green>>8), ((c).blue>>8), 0xff) #define RGB_TO_UINT(r,g,b) ((((guint)(r))<<16)|(((guint)(g))<<8)|((guint)(b))) #define RGB_TO_RGBA(x,a) (((x) << 8) | ((((guint)a) & 0xff))) #define RGB_WHITE RGB_TO_UINT(0xff, 0xff, 0xff) #define RGB_BLACK RGB_TO_UINT(0x00, 0x00, 0x00) #define RGB_RED RGB_TO_UINT(0xff, 0x00, 0x00) #define RGB_GREEN RGB_TO_UINT(0x00, 0xff, 0x00) #define RGB_BLUE RGB_TO_UINT(0x00, 0x00, 0xff) #define RGB_YELLOW RGB_TO_UINT(0xff, 0xff, 0x00) #define RGB_VIOLET RGB_TO_UINT(0xff, 0x00, 0xff) #define RGB_CYAN RGB_TO_UINT(0x00, 0xff, 0xff) #define RGB_GREY(x) RGB_TO_UINT(x,x,x) #define RGBA_TO_UINT(r,g,b,a) ((((guint)(r))<<24)|(((guint)(g))<<16)|(((guint)(b))<<8)|(guint)(a)) #define RGBA_WHITE RGB_TO_RGBA(RGB_WHITE, 0xff) #define RGBA_BLACK RGB_TO_RGBA(RGB_BLACK, 0xff) #define RGBA_RED RGB_TO_RGBA(RGB_RED, 0xff) #define RGBA_GREEN RGB_TO_RGBA(RGB_GREEN, 0xff) #define RGBA_BLUE RGB_TO_RGBA(RGB_BLUE, 0xff) #define RGBA_YELLOW RGB_TO_RGBA(RGB_YELLOW, 0xff) #define RGBA_VIOLET RGB_TO_RGBA(RGB_VIOLET, 0xff) #define RGBA_CYAN RGB_TO_RGBA(RGB_CYAN, 0xff) #define RGBA_GREY(x) RGB_TO_RGBA(RGB_GREY(x), 0xff) #define UINT_RGBA_R(x) (((guint)(x))>>24) #define UINT_RGBA_G(x) ((((guint)(x))>>16)&0xff) #define UINT_RGBA_B(x) ((((guint)(x))>>8)&0xff) #define UINT_RGBA_A(x) (((guint)(x))&0xff) #define UINT_RGBA_CHANGE_R(x, r) (((x)&(~(0xff<<24)))|(((r)&0xff)<<24)) #define UINT_RGBA_CHANGE_G(x, g) (((x)&(~(0xff<<16)))|(((g)&0xff)<<16)) #define UINT_RGBA_CHANGE_B(x, b) (((x)&(~(0xff<<8)))|(((b)&0xff)<<8)) #define UINT_RGBA_CHANGE_A(x, a) (((x)&(~0xff))|((a)&0xff)) #define UINT_TO_RGB(u,r,g,b) \ { (*(r)) = ((u)>>16)&0xff; (*(g)) = ((u)>>8)&0xff; (*(b)) = (u)&0xff; } #define UINT_TO_RGBA(u,r,g,b,a) \ { UINT_TO_RGB(((u)>>8),r,g,b); (*(a)) = (u)&0xff; } #define MONO_INTERPOLATE(v1, v2, t) ((gint)go_rint((v2)*(t)+(v1)*(1-(t)))) #define UINT_INTERPOLATE(c1, c2, t) \ RGBA_TO_UINT( MONO_INTERPOLATE(UINT_RGBA_R(c1), UINT_RGBA_R(c2), t), \ MONO_INTERPOLATE(UINT_RGBA_G(c1), UINT_RGBA_G(c2), t), \ MONO_INTERPOLATE(UINT_RGBA_B(c1), UINT_RGBA_B(c2), t), \ MONO_INTERPOLATE(UINT_RGBA_A(c1), UINT_RGBA_A(c2), t) ) #define PIXEL_RGB(p, r, g, b) \ {((guchar*)(p))[0]=(r); ((guchar*)(p))[1]=(g); ((guchar*)(p))[2]=(b);} #define PIXEL_RGBA(p, r, g, b, a) \ { if ((a)>=0xff) { PIXEL_RGB(p,r,g,b) } \ else if ((a)>0) { \ guint pixel_tmp; \ pixel_tmp = ((guchar*)(p))[0]; \ ((guchar*)(p))[0] = pixel_tmp + ((((r)-pixel_tmp)*(a)+0x80) >> 8); \ pixel_tmp = ((guchar*)(p))[1]; \ ((guchar*)(p))[1] = pixel_tmp + ((((g)-pixel_tmp)*(a)+0x80) >> 8); \ pixel_tmp = ((guchar*)(p))[2]; \ ((guchar*)(p))[2] = pixel_tmp + ((((b)-pixel_tmp)*(a)+0x80) >> 8); }} #define PIXEL_RGB_UINT(p, i) \ UINT_TO_RGB((i), ((guchar*)p), ((guchar*)p)+1, ((guchar*)p)+2) #define PIXEL_RGBA_UINT(p, i) \ PIXEL_RGBA((p), ((i)>>24)&0xff, ((i)>>16)&0xff, ((i)>>8)&0xff, (i)&0xff) #define PIXEL_BLACK(p) PIXEL_RGB(p,0,0,0) #define PIXEL_WHITE(p) PIXEL_RGB(p,0xff,0xff,0xff) #define PIXEL_GREY(p,g) PIXEL_RGB(p,g,g,g) #define PIXEL_GREYA(p,g,a) PIXEL_RGBA(p,g,g,g,a) #define DOUBLE_RGBA_R(x) (double)UINT_RGBA_R(x)/255.0 #define DOUBLE_RGBA_G(x) (double)UINT_RGBA_G(x)/255.0 #define DOUBLE_RGBA_B(x) (double)UINT_RGBA_B(x)/255.0 #define DOUBLE_RGBA_A(x) (double)UINT_RGBA_A(x)/255.0 #define GO_COLOR_TO_CAIRO(x) DOUBLE_RGBA_R(x),DOUBLE_RGBA_G(x),DOUBLE_RGBA_B(x),DOUBLE_RGBA_A(x) gboolean go_color_from_str (char const *str, GOColor *res); gchar *go_color_as_str (GOColor color); PangoAttribute *go_color_to_pango (GOColor color, gboolean is_fore); #ifdef GOFFICE_WITH_GTK GdkColor *go_color_to_gdk (GOColor color, GdkColor *res); #endif G_END_DECLS #endif /* GO_COLOR_H */