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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/primitive2d/fillgradientprimitive2d.hxx>
#include <basegfx/polygon/b2dpolygon.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <texture/texture.hxx>
#include <drawinglayer/primitive2d/PolyPolygonColorPrimitive2D.hxx>
#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
#include <utility>
#include <algorithm>
using namespace com::sun::star;
namespace drawinglayer::primitive2d
{
// Get the OuterColor. Take into account that for css::awt::GradientStyle_AXIAL
// this is the last one due to inverted gradient usage (see constructor there)
basegfx::BColor FillGradientPrimitive2D::getOuterColor() const
{
if (getFillGradient().getColorStops().empty())
return basegfx::BColor();
if (css::awt::GradientStyle_AXIAL == getFillGradient().getStyle())
return getFillGradient().getColorStops().back().getStopColor();
return getFillGradient().getColorStops().front().getStopColor();
}
// Get the needed UnitPolygon dependent on the GradientStyle
basegfx::B2DPolygon FillGradientPrimitive2D::getUnitPolygon() const
{
if (css::awt::GradientStyle_RADIAL == getFillGradient().getStyle()
|| css::awt::GradientStyle_ELLIPTICAL == getFillGradient().getStyle())
{
return basegfx::utils::createPolygonFromCircle(basegfx::B2DPoint(0.0, 0.0), 1.0);
}
return basegfx::utils::createPolygonFromRect(basegfx::B2DRange(-1.0, -1.0, 1.0, 1.0));
}
void FillGradientPrimitive2D::generateMatricesAndColors(
std::function<void(const basegfx::B2DHomMatrix& rMatrix, const basegfx::BColor& rColor)> aCallback) const
{
switch(getFillGradient().getStyle())
{
default: // GradientStyle_MAKE_FIXED_SIZE
case css::awt::GradientStyle_LINEAR:
{
texture::GeoTexSvxGradientLinear aGradient(
getDefinitionRange(),
getOutputRange(),
getFillGradient().getSteps(),
getFillGradient().getColorStops(),
getFillGradient().getBorder(),
getFillGradient().getAngle());
aGradient.appendTransformationsAndColors(aCallback);
break;
}
case css::awt::GradientStyle_AXIAL:
{
texture::GeoTexSvxGradientAxial aGradient(
getDefinitionRange(),
getOutputRange(),
getFillGradient().getSteps(),
getFillGradient().getColorStops(),
getFillGradient().getBorder(),
getFillGradient().getAngle());
aGradient.appendTransformationsAndColors(aCallback);
break;
}
case css::awt::GradientStyle_RADIAL:
{
texture::GeoTexSvxGradientRadial aGradient(
getDefinitionRange(),
getFillGradient().getSteps(),
getFillGradient().getColorStops(),
getFillGradient().getBorder(),
getFillGradient().getOffsetX(),
getFillGradient().getOffsetY());
aGradient.appendTransformationsAndColors(aCallback);
break;
}
case css::awt::GradientStyle_ELLIPTICAL:
{
texture::GeoTexSvxGradientElliptical aGradient(
getDefinitionRange(),
getFillGradient().getSteps(),
getFillGradient().getColorStops(),
getFillGradient().getBorder(),
getFillGradient().getOffsetX(),
getFillGradient().getOffsetY(),
getFillGradient().getAngle());
aGradient.appendTransformationsAndColors(aCallback);
break;
}
case css::awt::GradientStyle_SQUARE:
{
texture::GeoTexSvxGradientSquare aGradient(
getDefinitionRange(),
getFillGradient().getSteps(),
getFillGradient().getColorStops(),
getFillGradient().getBorder(),
getFillGradient().getOffsetX(),
getFillGradient().getOffsetY(),
getFillGradient().getAngle());
aGradient.appendTransformationsAndColors(aCallback);
break;
}
case css::awt::GradientStyle_RECT:
{
texture::GeoTexSvxGradientRect aGradient(
getDefinitionRange(),
getFillGradient().getSteps(),
getFillGradient().getColorStops(),
getFillGradient().getBorder(),
getFillGradient().getOffsetX(),
getFillGradient().getOffsetY(),
getFillGradient().getAngle());
aGradient.appendTransformationsAndColors(aCallback);
break;
}
}
}
void FillGradientPrimitive2D::createFill(Primitive2DContainer& rContainer, bool bOverlapping) const
{
if (bOverlapping)
{
// OverlappingFill: create solid fill with outmost color
rContainer.push_back(
new PolyPolygonColorPrimitive2D(
basegfx::B2DPolyPolygon(
basegfx::utils::createPolygonFromRect(getOutputRange())),
getOuterColor()));
// create solid fill steps by providing callback as lambda
auto aCallback([&rContainer,this](
const basegfx::B2DHomMatrix& rMatrix,
const basegfx::BColor& rColor)
{
// create part polygon
basegfx::B2DPolygon aNewPoly(getUnitPolygon());
aNewPoly.transform(rMatrix);
// create solid fill
rContainer.push_back(
new PolyPolygonColorPrimitive2D(
basegfx::B2DPolyPolygon(aNewPoly),
rColor));
});
// call value generator to trigger callbacks
generateMatricesAndColors(aCallback);
}
else
{
// NonOverlappingFill
if (getFillGradient().getColorStops().size() < 2)
{
// not really a gradient, we need to create a start primitive
// entry using the single color and the covered area
const basegfx::B2DRange aOutmostRange(getOutputRange());
rContainer.push_back(
new PolyPolygonColorPrimitive2D(
basegfx::B2DPolyPolygon(basegfx::utils::createPolygonFromRect(aOutmostRange)),
getOuterColor()));
}
else
{
// gradient with stops, prepare CombinedPolyPoly, use callback
basegfx::B2DPolyPolygon aCombinedPolyPoly;
basegfx::BColor aLastColor;
auto aCallback([&rContainer,&aCombinedPolyPoly,&aLastColor,this](
const basegfx::B2DHomMatrix& rMatrix,
const basegfx::BColor& rColor)
{
if (rContainer.empty())
{
// 1st callback, init CombinedPolyPoly & create 1st entry
basegfx::B2DRange aOutmostRange(getOutputRange());
// expand aOutmostRange with transformed first polygon
// to ensure confinement
basegfx::B2DPolygon aFirstPoly(getUnitPolygon());
aFirstPoly.transform(rMatrix);
aOutmostRange.expand(aFirstPoly.getB2DRange());
// build 1st combined polygon; outmost range 1st, then
// the shaped, transformed polygon
aCombinedPolyPoly.append(basegfx::utils::createPolygonFromRect(aOutmostRange));
aCombinedPolyPoly.append(aFirstPoly);
// create first primitive
rContainer.push_back(
new PolyPolygonColorPrimitive2D(
aCombinedPolyPoly,
getOuterColor()));
// save first polygon for re-use in next call, it's the second
// one, so remove 1st
aCombinedPolyPoly.remove(0);
// remember color for next primitive creation
aLastColor = rColor;
}
else
{
// regular n-th callback, create combined entry by re-using
// CombinedPolyPoly and aLastColor
basegfx::B2DPolygon aNextPoly(getUnitPolygon());
aNextPoly.transform(rMatrix);
aCombinedPolyPoly.append(aNextPoly);
// create primitive with correct color
rContainer.push_back(
new PolyPolygonColorPrimitive2D(
aCombinedPolyPoly,
aLastColor));
// prepare re-use of inner polygon, save color
aCombinedPolyPoly.remove(0);
aLastColor = rColor;
}
});
// call value generator to trigger callbacks
generateMatricesAndColors(aCallback);
// add last inner polygon with last color
rContainer.push_back(
new PolyPolygonColorPrimitive2D(
aCombinedPolyPoly,
aLastColor));
}
}
}
void FillGradientPrimitive2D::create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& /*rViewInformation*/) const
{
// default creates overlapping fill which works with AntiAliasing and without.
// The non-overlapping version does not create single filled polygons, but
// PolyPolygons where each one describes a 'ring' for the gradient such
// that the rings will not overlap. This is useful for the old XOR-paint
// 'trick' of VCL which is recorded in Metafiles; so this version may be
// used from the MetafilePrimitive2D in its decomposition.
if(!getFillGradient().isDefault())
{
createFill(rContainer, /*bOverlapping*/true);
}
}
FillGradientPrimitive2D::FillGradientPrimitive2D(
const basegfx::B2DRange& rOutputRange,
attribute::FillGradientAttribute aFillGradient)
: maOutputRange(rOutputRange),
maDefinitionRange(rOutputRange),
maFillGradient(std::move(aFillGradient))
{
}
FillGradientPrimitive2D::FillGradientPrimitive2D(
const basegfx::B2DRange& rOutputRange,
const basegfx::B2DRange& rDefinitionRange,
attribute::FillGradientAttribute aFillGradient)
: maOutputRange(rOutputRange),
maDefinitionRange(rDefinitionRange),
maFillGradient(std::move(aFillGradient))
{
}
bool FillGradientPrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
{
if(BufferedDecompositionPrimitive2D::operator==(rPrimitive))
{
const FillGradientPrimitive2D& rCompare = static_cast<const FillGradientPrimitive2D&>(rPrimitive);
return (getOutputRange() == rCompare.getOutputRange()
&& getDefinitionRange() == rCompare.getDefinitionRange()
&& getFillGradient() == rCompare.getFillGradient());
}
return false;
}
basegfx::B2DRange FillGradientPrimitive2D::getB2DRange(const geometry::ViewInformation2D& /*rViewInformation*/) const
{
// return the geometrically visible area
return getOutputRange();
}
// provide unique ID
sal_uInt32 FillGradientPrimitive2D::getPrimitive2DID() const
{
return PRIMITIVE2D_ID_FILLGRADIENTPRIMITIVE2D;
}
} // end of namespace
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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