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Diffstat (limited to 'basegfx/source/color/bcolormodifier.cxx')
| -rw-r--r-- | basegfx/source/color/bcolormodifier.cxx | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/basegfx/source/color/bcolormodifier.cxx b/basegfx/source/color/bcolormodifier.cxx new file mode 100644 index 000000000..e2a256728 --- /dev/null +++ b/basegfx/source/color/bcolormodifier.cxx @@ -0,0 +1,322 @@ +/* -*- 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 <config_options.h> +#include <sal/config.h> + +#include <algorithm> + +#include <basegfx/color/bcolormodifier.hxx> + +namespace basegfx +{ + BColorModifier::~BColorModifier() + { + } +} // end of namespace basegfx + +namespace basegfx +{ + 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); + } +} // end of namespace basegfx + +namespace basegfx +{ + 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()); + } +} // end of namespace basegfx + +namespace basegfx +{ + 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); + } +} // end of namespace basegfx + +namespace basegfx +{ + 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; + } +} // end of namespace basegfx + +namespace basegfx +{ + 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); + } +} // end of namespace basegfx + +namespace basegfx +{ + 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); + } + } +} // end of namespace basegfx + +namespace basegfx +{ + BColorModifier_gamma::BColorModifier_gamma(double fValue) + : BColorModifier(), + 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; + } + } +} // end of namespace basegfx + +namespace basegfx +{ + BColorModifier_RGBLuminanceContrast::BColorModifier_RGBLuminanceContrast(double fRed, double fGreen, double fBlue, double fLuminance, double fContrast) + : BColorModifier(), + 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; + } + } +} // end of namespace basegfx + +namespace basegfx +{ + ::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: */ |