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gfxColor.h
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00001 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
00002  * ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
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00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is Oracle Corporation code.
00016  *
00017  * The Initial Developer of the Original Code is Oracle Corporation.
00018  * Portions created by the Initial Developer are Copyright (C) 2005
00019  * the Initial Developer. All Rights Reserved.
00020  *
00021  * Contributor(s):
00022  *   Stuart Parmenter <pavlov@pavlov.net>
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either the GNU General Public License Version 2 or later (the "GPL"), or
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00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 #ifndef _GFX_COLOR_H
00039 #define _GFX_COLOR_H
00040 
00041 #include "nsPrintfCString.h"
00042 
00043 #include "gfxTypes.h"
00044 
00045 struct gfxRGBA {
00046     gfxFloat r, g, b, a;
00047 
00048     gfxRGBA() { }
00049     gfxRGBA(const gfxRGBA& c) : r(c.r), g(c.g), b(c.b), a(c.a) {}
00050     gfxRGBA(gfxFloat _r, gfxFloat _g, gfxFloat _b, gfxFloat _a=1.0) : r(_r), g(_g), b(_b), a(_a) {}
00051     gfxRGBA(PRUint32 c) {
00052         r = ((c >> 0) & 0xff) / 255.0;
00053         g = ((c >> 8) & 0xff) / 255.0;
00054         b = ((c >> 16) & 0xff) / 255.0;
00055         a = ((c >> 24) & 0xff) / 255.0;
00056     }
00057     gfxRGBA(const char* str) {
00058         a = 1.0;
00059         // if aString[0] is a #, parse it as hex
00060         // if aString[0] is a letter, parse it as a color name
00061         // if aString[0] is a number, parse it loosely as hex
00062     }
00063 
00064     PRUint32 Packed() const {
00065         return (((PRUint8)(a * 255.0) << 24) |
00066                 ((PRUint8)(b * 255.0) << 16) |
00067                 ((PRUint8)(g * 255.0) << 8) |
00068                 ((PRUint8)(r * 255.0)));
00069     }
00070 
00071     // XXX I'd really prefer to just have this return an nsACString
00072     // Does this function even make sense, since we're just ignoring the alpha value?
00073     void Hex(nsACString& result) const {
00074         nsPrintfCString hex(8, "%02x%02x%02x", PRUint8(r*255.0), PRUint8(g*255.0), PRUint8(b*255.0));
00075         result.Assign(hex);
00076     }
00077 
00078 };
00079 
00080 #endif /* _GFX_COLOR_H */