66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/*
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* Copyright 2009 John-Mark Bell <jmb@netsurf-browser.org>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file
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* Netsurf core css API
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*/
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#ifndef _NETSURF_CSS_H_
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#define _NETSURF_CSS_H_
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/**
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* Convert a CSS color to a NetSurf colour primitive
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*
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* ARGB -> (1-A)BGR
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*
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* \param c The CSS color to convert
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* \return Corresponding NetSurf colour primitive
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*/
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#define nscss_color_to_ns(c) \
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( ((~c) & 0xff000000) | \
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((( c) & 0xff0000 ) >> 16) | \
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(( c) & 0xff00 ) | \
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((( c) & 0xff ) << 16))
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/**
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* Convert a NetSurf color to a CSS colour primitive
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*
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* (1-A)BGR -> ARGB
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*
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* \param c The NetSurf color to convert
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* \return Corresponding CSS colour primitive
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*/
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#define ns_color_to_nscss(c) \
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( ((~c) & 0xff000000) | \
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((( c) & 0xff0000 ) >> 16) | \
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(( c) & 0xff00 ) | \
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((( c) & 0xff ) << 16))
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/**
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* Determine if a CSS color primitive is transparent
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*
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* \param color The CSS color to consider
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* \return True if the color is transparent, false otherwise
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*/
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#define nscss_color_is_transparent(color) \
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(((color) >> 24) == 0)
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#endif
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