Ichthyostega
6339a288dd
HOWTO
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81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
/*
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CAIRO-UTIL.hpp - utility functions for Cairo
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Copyright (C) Lumiera.org
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2010, Stefan Kangas <skangas@skangas.se>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program 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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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/** @file cairo-util.hpp
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** TODO cairo-util.hpp
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*/
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#include <cairomm/cairomm.h>
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#ifndef GUI_UTIL_CAIRO_H
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#define GUI_UTIL_CAIRO_H
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using Cairo::RefPtr;
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using Cairo::SolidPattern;
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namespace gui {
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namespace util {
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/**
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* @todo this is not a real entity; consider to turn this into a set of free functions!
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*/
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class CairoUtil
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{
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public:
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/**
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* Make a new SolidPattern from an old one, changing the red component of the colour.
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* @param The new value for the red component of the colour.
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* @return The new pattern.
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*/
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static RefPtr<SolidPattern>
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pattern_set_red (const RefPtr<SolidPattern> color, double red);
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/**
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* Make a new SolidPattern from an old one, changing the green component of the colour.
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* @param The new value for the green component of the colour.
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* @return The new pattern.
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*/
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static RefPtr<SolidPattern>
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pattern_set_green (const RefPtr<SolidPattern>, double green);
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/**
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* Make a new SolidPattern from an old one, changing the blue component of the colour.
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* @param The new value for the blue component of the colour.
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* @return The new pattern.
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*/
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static RefPtr<SolidPattern>
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pattern_set_blue (const RefPtr<SolidPattern>, double blue);
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/**
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* Make a new SolidPattern from an old one, changing the alpha component of the colour.
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* @param The new value for the alpha component of the colour.
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* @return The new pattern.
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*/
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static RefPtr<SolidPattern>
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pattern_set_alpha (const RefPtr<SolidPattern>, double alpha);
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};
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}}// namespace gui::util
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#endif /*GUI_UTIL_CAIRO_H*/
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