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Diffstat (limited to 'drawinglayer/source/primitive2d/fillgradientprimitive2d.cxx')
| -rw-r--r-- | drawinglayer/source/primitive2d/fillgradientprimitive2d.cxx | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/drawinglayer/source/primitive2d/fillgradientprimitive2d.cxx b/drawinglayer/source/primitive2d/fillgradientprimitive2d.cxx new file mode 100644 index 000000000..7baf93bf5 --- /dev/null +++ b/drawinglayer/source/primitive2d/fillgradientprimitive2d.cxx @@ -0,0 +1,334 @@ +/* -*- 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> + + +using namespace com::sun::star; + + +namespace drawinglayer::primitive2d +{ + void FillGradientPrimitive2D::generateMatricesAndColors( + std::vector< drawinglayer::texture::B2DHomMatrixAndBColor >& rEntries, + basegfx::BColor& rOuterColor) const + { + rEntries.clear(); + + // make sure steps is not too high/low + const basegfx::BColor aStart(getFillGradient().getStartColor()); + const basegfx::BColor aEnd(getFillGradient().getEndColor()); + const sal_uInt32 nMaxSteps(sal_uInt32((aStart.getMaximumDistance(aEnd) * 127.5) + 0.5)); + sal_uInt32 nSteps(getFillGradient().getSteps()); + + if(nSteps == 0) + { + nSteps = nMaxSteps; + } + + if(nSteps < 2) + { + nSteps = 2; + } + + if(nSteps > nMaxSteps) + { + nSteps = nMaxSteps; + } + + nSteps = std::max(sal_uInt32(1), nSteps); + + switch(getFillGradient().getStyle()) + { + case attribute::GradientStyle::Linear: + { + texture::GeoTexSvxGradientLinear aGradient( + getDefinitionRange(), + getOutputRange(), + aStart, + aEnd, + nSteps, + getFillGradient().getBorder(), + getFillGradient().getAngle()); + aGradient.appendTransformationsAndColors(rEntries, rOuterColor); + break; + } + case attribute::GradientStyle::Axial: + { + texture::GeoTexSvxGradientAxial aGradient( + getDefinitionRange(), + getOutputRange(), + aStart, + aEnd, + nSteps, + getFillGradient().getBorder(), + getFillGradient().getAngle()); + aGradient.appendTransformationsAndColors(rEntries, rOuterColor); + break; + } + case attribute::GradientStyle::Radial: + { + texture::GeoTexSvxGradientRadial aGradient( + getDefinitionRange(), + aStart, + aEnd, + nSteps, + getFillGradient().getBorder(), + getFillGradient().getOffsetX(), + getFillGradient().getOffsetY()); + aGradient.appendTransformationsAndColors(rEntries, rOuterColor); + break; + } + case attribute::GradientStyle::Elliptical: + { + texture::GeoTexSvxGradientElliptical aGradient( + getDefinitionRange(), + aStart, + aEnd, + nSteps, + getFillGradient().getBorder(), + getFillGradient().getOffsetX(), + getFillGradient().getOffsetY(), + getFillGradient().getAngle()); + aGradient.appendTransformationsAndColors(rEntries, rOuterColor); + break; + } + case attribute::GradientStyle::Square: + { + texture::GeoTexSvxGradientSquare aGradient( + getDefinitionRange(), + aStart, + aEnd, + nSteps, + getFillGradient().getBorder(), + getFillGradient().getOffsetX(), + getFillGradient().getOffsetY(), + getFillGradient().getAngle()); + aGradient.appendTransformationsAndColors(rEntries, rOuterColor); + break; + } + case attribute::GradientStyle::Rect: + { + texture::GeoTexSvxGradientRect aGradient( + getDefinitionRange(), + aStart, + aEnd, + nSteps, + getFillGradient().getBorder(), + getFillGradient().getOffsetX(), + getFillGradient().getOffsetY(), + getFillGradient().getAngle()); + aGradient.appendTransformationsAndColors(rEntries, rOuterColor); + break; + } + } + } + + void FillGradientPrimitive2D::createOverlappingFill( + Primitive2DContainer& rContainer, + const std::vector< drawinglayer::texture::B2DHomMatrixAndBColor >& rEntries, + const basegfx::BColor& rOuterColor, + const basegfx::B2DPolygon& rUnitPolygon) const + { + // create solid fill with outmost color + rContainer.push_back( + new PolyPolygonColorPrimitive2D( + basegfx::B2DPolyPolygon( + basegfx::utils::createPolygonFromRect(getOutputRange())), + rOuterColor)); + + // create solid fill steps + for(const auto &a : rEntries) + { + // create part polygon + basegfx::B2DPolygon aNewPoly(rUnitPolygon); + + aNewPoly.transform(a.maB2DHomMatrix); + + // create solid fill + rContainer.push_back( + new PolyPolygonColorPrimitive2D( + basegfx::B2DPolyPolygon(aNewPoly), + a.maBColor)); + } + } + + void FillGradientPrimitive2D::createNonOverlappingFill( + Primitive2DContainer& rContainer, + const std::vector< drawinglayer::texture::B2DHomMatrixAndBColor >& rEntries, + const basegfx::BColor& rOuterColor, + const basegfx::B2DPolygon& rUnitPolygon) const + { + // get outmost visible range from object + basegfx::B2DRange aOutmostRange(getOutputRange()); + basegfx::B2DPolyPolygon aCombinedPolyPoly; + + if(!rEntries.empty()) + { + // extend aOutmostRange with first polygon + basegfx::B2DPolygon aFirstPoly(rUnitPolygon); + + aFirstPoly.transform(rEntries[0].maB2DHomMatrix); + aCombinedPolyPoly.append(aFirstPoly); + aOutmostRange.expand(aFirstPoly.getB2DRange()); + } + + // add outmost range to combined polypolygon (in 1st place), create first primitive + aCombinedPolyPoly.insert(0, basegfx::utils::createPolygonFromRect(aOutmostRange)); + rContainer.push_back( + new PolyPolygonColorPrimitive2D( + aCombinedPolyPoly, + rOuterColor)); + + if(rEntries.empty()) + return; + + // reuse first polygon, it's the second one + aCombinedPolyPoly.remove(0); + + for(size_t a(0); a < rEntries.size() - 1; a++) + { + // create next inner polygon, combined with last one + basegfx::B2DPolygon aNextPoly(rUnitPolygon); + + aNextPoly.transform(rEntries[a + 1].maB2DHomMatrix); + aCombinedPolyPoly.append(aNextPoly); + + // create primitive with correct color + rContainer.push_back( + new PolyPolygonColorPrimitive2D( + aCombinedPolyPoly, + rEntries[a].maBColor)); + + // reuse inner polygon, it's the 2nd one + aCombinedPolyPoly.remove(0); + } + + // add last inner polygon with last color + rContainer.push_back( + new PolyPolygonColorPrimitive2D( + aCombinedPolyPoly, + rEntries[rEntries.size() - 1].maBColor)); + } + + void FillGradientPrimitive2D::createFill(Primitive2DContainer& rContainer, bool bOverlapping) const + { + // prepare shape of the Unit Polygon + basegfx::B2DPolygon aUnitPolygon; + + switch(getFillGradient().getStyle()) + { + case attribute::GradientStyle::Radial: + case attribute::GradientStyle::Elliptical: + { + aUnitPolygon = basegfx::utils::createPolygonFromCircle(basegfx::B2DPoint(0.0, 0.0), 1.0); + break; + } + default: // GradientStyle::Linear, attribute::GradientStyle::Axial, attribute::GradientStyle::Square, attribute::GradientStyle::Rect + { + aUnitPolygon = basegfx::utils::createPolygonFromRect(basegfx::B2DRange(-1.0, -1.0, 1.0, 1.0)); + break; + } + } + + // get the transform matrices and colors (where colors + // will have one more entry that matrices) + std::vector< drawinglayer::texture::B2DHomMatrixAndBColor > aEntries; + basegfx::BColor aOuterColor; + + generateMatricesAndColors(aEntries, aOuterColor); + + if(bOverlapping) + { + createOverlappingFill(rContainer, aEntries, aOuterColor, aUnitPolygon); + } + else + { + createNonOverlappingFill(rContainer, aEntries, aOuterColor, aUnitPolygon); + } + } + + 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, + const attribute::FillGradientAttribute& rFillGradient) + : maOutputRange(rOutputRange), + maDefinitionRange(rOutputRange), + maFillGradient(rFillGradient) + { + } + + FillGradientPrimitive2D::FillGradientPrimitive2D( + const basegfx::B2DRange& rOutputRange, + const basegfx::B2DRange& rDefinitionRange, + const attribute::FillGradientAttribute& rFillGradient) + : maOutputRange(rOutputRange), + maDefinitionRange(rDefinitionRange), + maFillGradient(rFillGradient) + { + } + + 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: */ |