diff options
Diffstat (limited to 'drawinglayer/source/primitive2d/fillgradientprimitive2d.cxx')
| -rw-r--r-- | drawinglayer/source/primitive2d/fillgradientprimitive2d.cxx | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/drawinglayer/source/primitive2d/fillgradientprimitive2d.cxx b/drawinglayer/source/primitive2d/fillgradientprimitive2d.cxx new file mode 100644 index 0000000000..f39daccc43 --- /dev/null +++ b/drawinglayer/source/primitive2d/fillgradientprimitive2d.cxx @@ -0,0 +1,320 @@ +/* -*- 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: */ |