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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef _BGFX_COLOR_BCOLORMODIFIER_HXX
#define _BGFX_COLOR_BCOLORMODIFIER_HXX
#include <basegfx/color/bcolor.hxx>
#include <vector>
#include <basegfx/basegfxdllapi.h>
//////////////////////////////////////////////////////////////////////////////
namespace basegfx
{
/** Descriptor for type of color modification
*/
enum BColorModifyMode
{
BCOLORMODIFYMODE_REPLACE, // replace all color with local color
BCOLORMODIFYMODE_INTERPOLATE, // interpolate color between given and local with local value
BCOLORMODIFYMODE_GRAY, // convert color to gray
BCOLORMODIFYMODE_BLACKANDWHITE, // convert color to B&W, local value is treshhold
BCOLORMODIFYMODE_INVERT, // invert color
BCOLORMODIFYMODE_LUMINANCE_TO_ALPHA // convert color to alpha value (used for Svg Mask)
};
/** Class to hold a color, value and mode for a color modification. Color modification is
done calling the getModifiedColor() method
*/
class BASEGFX_DLLPUBLIC SAL_WARN_UNUSED BColorModifier
{
protected:
::basegfx::BColor maBColor;
double mfValue;
BColorModifyMode meMode;
public:
BColorModifier(
const ::basegfx::BColor& rBColor,
double fValue = 0.5,
BColorModifyMode eMode = BCOLORMODIFYMODE_REPLACE)
: maBColor(rBColor),
mfValue(fValue),
meMode(eMode)
{}
// compare operator(s)
bool operator==(const BColorModifier& rCompare) const
{
return (maBColor == rCompare.maBColor && mfValue == rCompare.mfValue && meMode == rCompare.meMode);
}
bool operator!=(const BColorModifier& rCompare) const
{
return !(operator==(rCompare));
}
// data access
const ::basegfx::BColor& getBColor() const { return maBColor; }
double getValue() const { return mfValue; }
BColorModifyMode getMode() const { return meMode; }
// compute modified color
::basegfx::BColor getModifiedColor(const ::basegfx::BColor& aSourceColor) const;
};
/** Class to hold a stack of BColorModifiers and to get the modified color with
applying all existing entry changes
*/
class BASEGFX_DLLPUBLIC BColorModifierStack
{
protected:
::std::vector< BColorModifier > maBColorModifiers;
public:
sal_uInt32 count() const
{
return maBColorModifiers.size();
}
const BColorModifier& getBColorModifier(sal_uInt32 nIndex) const
{
OSL_ENSURE(nIndex < count(), "BColorModifierStack: Access out of range (!)");
return maBColorModifiers[nIndex];
}
::basegfx::BColor getModifiedColor(const ::basegfx::BColor& rSource) const
{
if(count())
{
::basegfx::BColor aRetval(rSource);
::std::vector< BColorModifier >::const_iterator aEnd(maBColorModifiers.end());
while(aEnd != maBColorModifiers.begin())
{
aRetval = (--aEnd)->getModifiedColor(aRetval);
}
return aRetval;
}
else
{
return rSource;
}
}
void push(const BColorModifier& rNew)
{
maBColorModifiers.push_back(rNew);
}
void pop()
{
maBColorModifiers.pop_back();
}
};
} // end of namespace basegfx
#endif // _BGFX_COLOR_BCOLORMODIFIER_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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