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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 <drawinglayer/attribute/fillgradientattribute.hxx>
#include <basegfx/utils/gradienttools.hxx>
namespace drawinglayer::attribute
{
class ImpFillGradientAttribute
{
public:
// data definitions
double mfBorder;
double mfOffsetX;
double mfOffsetY;
double mfAngle;
basegfx::ColorStops maColorStops;
GradientStyle meStyle;
sal_uInt16 mnSteps;
ImpFillGradientAttribute(
GradientStyle eStyle,
double fBorder,
double fOffsetX,
double fOffsetY,
double fAngle,
const basegfx::ColorStops& rColorStops,
sal_uInt16 nSteps)
: mfBorder(fBorder),
mfOffsetX(fOffsetX),
mfOffsetY(fOffsetY),
mfAngle(fAngle),
maColorStops(rColorStops), // copy ColorStops
meStyle(eStyle),
mnSteps(nSteps)
{
// Correct the local ColorStops. That will guarantee that the
// content does contain no offsets < 0.0, > 1.0 or double
// ones, also secures sorted arrangement and checks for
// double colors, too (see there for more information).
// This is what the usages of this in primitives need.
// Since FillGradientAttribute is read-only doing this
// once here in the constructor is sufficient
basegfx::utils::sortAndCorrectColorStops(maColorStops);
// sortAndCorrectColorStops is rigid and can return
// an empty result. To keep things simple, add a single
// fallback value
if (maColorStops.empty())
{
maColorStops.emplace_back(0.0, basegfx::BColor());
}
}
ImpFillGradientAttribute()
: mfBorder(0.0),
mfOffsetX(0.0),
mfOffsetY(0.0),
mfAngle(0.0),
maColorStops(),
meStyle(GradientStyle::Linear),
mnSteps(0)
{
// always add a fallback color, see above
maColorStops.emplace_back(0.0, basegfx::BColor());
}
// data read access
GradientStyle getStyle() const { return meStyle; }
double getBorder() const { return mfBorder; }
double getOffsetX() const { return mfOffsetX; }
double getOffsetY() const { return mfOffsetY; }
double getAngle() const { return mfAngle; }
const basegfx::ColorStops& getColorStops() const { return maColorStops; }
sal_uInt16 getSteps() const { return mnSteps; }
bool hasSingleColor() const
{
// No entry (should not happen, see comments for startColor above)
// or single entry -> no gradient.
// No need to check for all-the-same color since this is checked/done
// in the constructor already, see there
return maColorStops.size() < 2;
}
bool operator==(const ImpFillGradientAttribute& rCandidate) const
{
return (getStyle() == rCandidate.getStyle()
&& getBorder() == rCandidate.getBorder()
&& getOffsetX() == rCandidate.getOffsetX()
&& getOffsetY() == rCandidate.getOffsetY()
&& getAngle() == rCandidate.getAngle()
&& getColorStops() == rCandidate.getColorStops()
&& getSteps() == rCandidate.getSteps());
}
};
namespace
{
FillGradientAttribute::ImplType& theGlobalDefault()
{
static FillGradientAttribute::ImplType SINGLETON;
return SINGLETON;
}
}
FillGradientAttribute::FillGradientAttribute(
GradientStyle eStyle,
double fBorder,
double fOffsetX,
double fOffsetY,
double fAngle,
const basegfx::ColorStops& rColorStops,
sal_uInt16 nSteps)
: mpFillGradientAttribute(ImpFillGradientAttribute(
eStyle, fBorder, fOffsetX, fOffsetY, fAngle, rColorStops, nSteps))
{
}
FillGradientAttribute::FillGradientAttribute()
: mpFillGradientAttribute(theGlobalDefault())
{
}
FillGradientAttribute::FillGradientAttribute(const FillGradientAttribute&) = default;
FillGradientAttribute::FillGradientAttribute(FillGradientAttribute&&) = default;
FillGradientAttribute::~FillGradientAttribute() = default;
bool FillGradientAttribute::isDefault() const
{
return mpFillGradientAttribute.same_object(theGlobalDefault());
}
bool FillGradientAttribute::hasSingleColor() const
{
return mpFillGradientAttribute->hasSingleColor();
}
// MCGR: Check if rendering cannot be handled by old vcl stuff
bool FillGradientAttribute::cannotBeHandledByVCL() const
{
// MCGR: If GradientStops are used, use decomposition since vcl is not able
// to render multi-color gradients
if (getColorStops().size() != 2)
{
return true;
}
// MCGR: If GradientStops do not start and stop at traditional Start/EndColor,
// use decomposition since vcl is not able to render this
if (!getColorStops().empty())
{
if (!basegfx::fTools::equalZero(getColorStops().front().getStopOffset())
|| !basegfx::fTools::equal(getColorStops().back().getStopOffset(), 1.0))
{
return true;
}
}
// VCL should be able to handle all styles, but for tdf#133477 the VCL result
// is different from processing the gradient manually by drawinglayer
// (and the Writer unittest for it fails). Keep using the drawinglayer code
// until somebody founds out what's wrong and fixes it.
if (getStyle() != drawinglayer::attribute::GradientStyle::Linear
&& getStyle() != drawinglayer::attribute::GradientStyle::Axial
&& getStyle() != drawinglayer::attribute::GradientStyle::Radial)
{
return true;
}
return false;
}
FillGradientAttribute& FillGradientAttribute::operator=(const FillGradientAttribute&) = default;
FillGradientAttribute& FillGradientAttribute::operator=(FillGradientAttribute&&) = default;
bool FillGradientAttribute::operator==(const FillGradientAttribute& rCandidate) const
{
// tdf#87509 default attr is always != non-default attr, even with same values
if(rCandidate.isDefault() != isDefault())
return false;
return rCandidate.mpFillGradientAttribute == mpFillGradientAttribute;
}
const basegfx::ColorStops& FillGradientAttribute::getColorStops() const
{
return mpFillGradientAttribute->getColorStops();
}
double FillGradientAttribute::getBorder() const
{
return mpFillGradientAttribute->getBorder();
}
double FillGradientAttribute::getOffsetX() const
{
return mpFillGradientAttribute->getOffsetX();
}
double FillGradientAttribute::getOffsetY() const
{
return mpFillGradientAttribute->getOffsetY();
}
double FillGradientAttribute::getAngle() const
{
return mpFillGradientAttribute->getAngle();
}
GradientStyle FillGradientAttribute::getStyle() const
{
return mpFillGradientAttribute->getStyle();
}
sal_uInt16 FillGradientAttribute::getSteps() const
{
return mpFillGradientAttribute->getSteps();
}
} // end of namespace
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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