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Diffstat (limited to 'include/basegfx/color/bcolormodifier.hxx')
-rw-r--r-- | include/basegfx/color/bcolormodifier.hxx | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/include/basegfx/color/bcolormodifier.hxx b/include/basegfx/color/bcolormodifier.hxx new file mode 100644 index 000000000000..4b6f04efc8e9 --- /dev/null +++ b/include/basegfx/color/bcolormodifier.hxx @@ -0,0 +1,137 @@ +/* -*- 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: */ |