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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 .
*/
#include <sal/config.h>
#include <algorithm>
#include <basegfx/color/bcolormodifier.hxx>
namespace basegfx
{
BColorModifier::~BColorModifier()
{
}
BColorModifier_gray::~BColorModifier_gray()
{
}
bool BColorModifier_gray::operator==(const BColorModifier& rCompare) const
{
return dynamic_cast< const BColorModifier_gray* >(&rCompare) != nullptr;
}
::basegfx::BColor BColorModifier_gray::getModifiedColor(const ::basegfx::BColor& aSourceColor) const
{
const double fLuminance(aSourceColor.luminance());
return ::basegfx::BColor(fLuminance, fLuminance, fLuminance);
}
BColorModifier_invert::~BColorModifier_invert()
{
}
bool BColorModifier_invert::operator==(const BColorModifier& rCompare) const
{
return dynamic_cast< const BColorModifier_invert* >(&rCompare) != nullptr;
}
::basegfx::BColor BColorModifier_invert::getModifiedColor(const ::basegfx::BColor& aSourceColor) const
{
return ::basegfx::BColor(1.0 - aSourceColor.getRed(), 1.0 - aSourceColor.getGreen(), 1.0 - aSourceColor.getBlue());
}
BColorModifier_luminance_to_alpha::~BColorModifier_luminance_to_alpha()
{
}
bool BColorModifier_luminance_to_alpha::operator==(const BColorModifier& rCompare) const
{
return dynamic_cast< const BColorModifier_luminance_to_alpha* >(&rCompare) != nullptr;
}
::basegfx::BColor BColorModifier_luminance_to_alpha::getModifiedColor(const ::basegfx::BColor& aSourceColor) const
{
const double fAlpha(1.0 - ((aSourceColor.getRed() * 0.2125) + (aSourceColor.getGreen() * 0.7154) + (aSourceColor.getBlue() * 0.0721)));
return ::basegfx::BColor(fAlpha, fAlpha, fAlpha);
}
BColorModifier_replace::~BColorModifier_replace()
{
}
bool BColorModifier_replace::operator==(const BColorModifier& rCompare) const
{
const BColorModifier_replace* pCompare = dynamic_cast< const BColorModifier_replace* >(&rCompare);
if(!pCompare)
{
return false;
}
return getBColor() == pCompare->getBColor();
}
::basegfx::BColor BColorModifier_replace::getModifiedColor(const ::basegfx::BColor& /*aSourceColor*/) const
{
return maBColor;
}
BColorModifier_interpolate::~BColorModifier_interpolate()
{
}
bool BColorModifier_interpolate::operator==(const BColorModifier& rCompare) const
{
const BColorModifier_interpolate* pCompare = dynamic_cast< const BColorModifier_interpolate* >(&rCompare);
if(!pCompare)
{
return false;
}
return maBColor == pCompare->maBColor && mfValue == pCompare->mfValue;
}
::basegfx::BColor BColorModifier_interpolate::getModifiedColor(const ::basegfx::BColor& aSourceColor) const
{
return interpolate(maBColor, aSourceColor, mfValue);
}
BColorModifier_black_and_white::~BColorModifier_black_and_white()
{
}
bool BColorModifier_black_and_white::operator==(const BColorModifier& rCompare) const
{
const BColorModifier_black_and_white* pCompare = dynamic_cast< const BColorModifier_black_and_white* >(&rCompare);
if(!pCompare)
{
return false;
}
return mfValue == pCompare->mfValue;
}
::basegfx::BColor BColorModifier_black_and_white::getModifiedColor(const ::basegfx::BColor& aSourceColor) const
{
const double fLuminance(aSourceColor.luminance());
if(fLuminance < mfValue)
{
return ::basegfx::BColor::getEmptyBColor();
}
else
{
return ::basegfx::BColor(1.0, 1.0, 1.0);
}
}
BColorModifier_gamma::BColorModifier_gamma(double fValue)
: mfValue(fValue),
mfInvValue(fValue),
mbUseIt(!basegfx::fTools::equal(fValue, 1.0) && basegfx::fTools::more(fValue, 0.0) && basegfx::fTools::lessOrEqual(fValue, 10.0))
{
if(mbUseIt)
{
mfInvValue = 1.0 / mfValue;
}
}
BColorModifier_gamma::~BColorModifier_gamma()
{
}
bool BColorModifier_gamma::operator==(const BColorModifier& rCompare) const
{
const BColorModifier_gamma* pCompare = dynamic_cast< const BColorModifier_gamma* >(&rCompare);
if(!pCompare)
{
return false;
}
// getValue is sufficient, mfInvValue and mbUseIt are only helper values
return mfValue == pCompare->mfValue;
}
::basegfx::BColor BColorModifier_gamma::getModifiedColor(const ::basegfx::BColor& aSourceColor) const
{
if(mbUseIt)
{
::basegfx::BColor aRetval(
pow(aSourceColor.getRed(), mfInvValue),
pow(aSourceColor.getGreen(), mfInvValue),
pow(aSourceColor.getBlue(), mfInvValue));
aRetval.clamp();
return aRetval;
}
else
{
return aSourceColor;
}
}
BColorModifier_RGBLuminanceContrast::BColorModifier_RGBLuminanceContrast(double fRed, double fGreen, double fBlue, double fLuminance, double fContrast)
: mfRed(std::clamp(fRed, -1.0, 1.0)),
mfGreen(std::clamp(fGreen, -1.0, 1.0)),
mfBlue(std::clamp(fBlue, -1.0, 1.0)),
mfLuminance(std::clamp(fLuminance, -1.0, 1.0)),
mfContrast(std::clamp(fContrast, -1.0, 1.0)),
mfContrastOff(1.0),
mfRedOff(0.0),
mfGreenOff(0.0),
mfBlueOff(0.0),
mbUseIt(false)
{
if(basegfx::fTools::equalZero(mfRed)
&& basegfx::fTools::equalZero(mfGreen)
&& basegfx::fTools::equalZero(mfBlue)
&& basegfx::fTools::equalZero(mfLuminance)
&& basegfx::fTools::equalZero(mfContrast))
return;
// calculate slope
if(mfContrast >= 0.0)
{
mfContrastOff = 128.0 / (128.0 - (mfContrast * 127.0));
}
else
{
mfContrastOff = ( 128.0 + (mfContrast * 127.0)) / 128.0;
}
// calculate unified contrast offset
const double fPreparedContrastOff((128.0 - mfContrastOff * 128.0) / 255.0);
const double fCombinedOffset(mfLuminance + fPreparedContrastOff);
// set full offsets
mfRedOff = mfRed + fCombinedOffset;
mfGreenOff = mfGreen + fCombinedOffset;
mfBlueOff = mfBlue + fCombinedOffset;
mbUseIt = true;
}
BColorModifier_RGBLuminanceContrast::~BColorModifier_RGBLuminanceContrast()
{
}
bool BColorModifier_RGBLuminanceContrast::operator==(const BColorModifier& rCompare) const
{
const BColorModifier_RGBLuminanceContrast* pCompare = dynamic_cast< const BColorModifier_RGBLuminanceContrast* >(&rCompare);
if(!pCompare)
{
return false;
}
// no need to compare other values, these are just helpers
return mfRed == pCompare->mfRed
&& mfGreen == pCompare->mfGreen
&& mfBlue == pCompare->mfBlue
&& mfLuminance == pCompare->mfLuminance
&& mfContrast == pCompare->mfContrast;
}
::basegfx::BColor BColorModifier_RGBLuminanceContrast::getModifiedColor(const ::basegfx::BColor& aSourceColor) const
{
if(mbUseIt)
{
return basegfx::BColor(
std::clamp(aSourceColor.getRed() * mfContrastOff + mfRedOff, 0.0, 1.0),
std::clamp(aSourceColor.getGreen() * mfContrastOff + mfGreenOff, 0.0, 1.0),
std::clamp(aSourceColor.getBlue() * mfContrastOff + mfBlueOff, 0.0, 1.0));
}
else
{
return aSourceColor;
}
}
::basegfx::BColor BColorModifierStack::getModifiedColor(const ::basegfx::BColor& rSource) const
{
if(maBColorModifiers.empty())
{
return rSource;
}
::basegfx::BColor aRetval(rSource);
for(sal_uInt32 a(maBColorModifiers.size()); a;)
{
a--;
aRetval = maBColorModifiers[a]->getModifiedColor(aRetval);
}
return aRetval;
}
} // end of namespace basegfx
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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