xref: /AOO41X/main/drawinglayer/source/primitive2d/fillgradientprimitive2d.cxx (revision 96fc4b33382e706b7361f08aba6c96207eedf10a)

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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_drawinglayer.hxx"

#include <drawinglayer/primitive2d/fillgradientprimitive2d.hxx>
#include <basegfx/polygon/b2dpolygon.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <drawinglayer/texture/texture.hxx>
#include <drawinglayer/primitive2d/polypolygonprimitive2d.hxx>
#include <basegfx/tools/canvastools.hxx>
#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>

//////////////////////////////////////////////////////////////////////////////

using namespace com::sun::star;

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
	namespace primitive2d
	{
        void FillGradientPrimitive2D::generateMatricesAndColors(
            std::vector< drawinglayer::texture::B2DHomMatrixAndBColor >& rEntries,
            basegfx::BColor& rOutmostColor) 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;
			}

			switch(getFillGradient().getStyle())
			{
				case attribute::GRADIENTSTYLE_LINEAR:
				{
					texture::GeoTexSvxGradientLinear aGradient(getObjectRange(), aStart, aEnd, nSteps, getFillGradient().getBorder(), getFillGradient().getAngle());
					aGradient.appendTransformationsAndColors(rEntries, rOutmostColor);
					break;
				}
				case attribute::GRADIENTSTYLE_AXIAL:
				{
					texture::GeoTexSvxGradientAxial aGradient(getObjectRange(), aStart, aEnd, nSteps, getFillGradient().getBorder(), getFillGradient().getAngle());
					aGradient.appendTransformationsAndColors(rEntries, rOutmostColor);
					break;
				}
				case attribute::GRADIENTSTYLE_RADIAL:
				{
					texture::GeoTexSvxGradientRadial aGradient(getObjectRange(), aStart, aEnd, nSteps, getFillGradient().getBorder(), getFillGradient().getOffsetX(), getFillGradient().getOffsetY());
					aGradient.appendTransformationsAndColors(rEntries, rOutmostColor);
					break;
				}
				case attribute::GRADIENTSTYLE_ELLIPTICAL:
				{
					texture::GeoTexSvxGradientElliptical aGradient(getObjectRange(), aStart, aEnd, nSteps, getFillGradient().getBorder(), getFillGradient().getOffsetX(), getFillGradient().getOffsetY(), getFillGradient().getAngle());
					aGradient.appendTransformationsAndColors(rEntries, rOutmostColor);
					break;
				}
				case attribute::GRADIENTSTYLE_SQUARE:
				{
					texture::GeoTexSvxGradientSquare aGradient(getObjectRange(), aStart, aEnd, nSteps, getFillGradient().getBorder(), getFillGradient().getOffsetX(), getFillGradient().getOffsetY(), getFillGradient().getAngle());
					aGradient.appendTransformationsAndColors(rEntries, rOutmostColor);
					break;
				}
				case attribute::GRADIENTSTYLE_RECT:
				{
					texture::GeoTexSvxGradientRect aGradient(getObjectRange(), aStart, aEnd, nSteps, getFillGradient().getBorder(), getFillGradient().getOffsetX(), getFillGradient().getOffsetY(), getFillGradient().getAngle());
					aGradient.appendTransformationsAndColors(rEntries, rOutmostColor);
					break;
				}
			}
        }

        Primitive2DSequence FillGradientPrimitive2D::createOverlappingFill(
            const std::vector< drawinglayer::texture::B2DHomMatrixAndBColor >& rEntries,
            const basegfx::BColor& rOutmostColor,
            const basegfx::B2DPolygon& rUnitPolygon) const
        {
            // prepare return value
            Primitive2DSequence aRetval(rEntries.size() + 1);

            // create solid fill with outmost color
            aRetval[0] = Primitive2DReference(
                new PolyPolygonColorPrimitive2D(
                    basegfx::B2DPolyPolygon(basegfx::tools::createPolygonFromRect(getObjectRange())),
                    rOutmostColor));

            // create solid fill steps
            for(sal_uInt32 a(0); a < rEntries.size(); a++)
            {
                // create part polygon
                basegfx::B2DPolygon aNewPoly(rUnitPolygon);

                aNewPoly.transform(rEntries[a].maB2DHomMatrix);

                // create solid fill
                aRetval[a + 1] = Primitive2DReference(
                    new PolyPolygonColorPrimitive2D(
                        basegfx::B2DPolyPolygon(aNewPoly),
                        rEntries[a].maBColor));
            }

            return aRetval;
        }

        Primitive2DSequence FillGradientPrimitive2D::createNonOverlappingFill(
            const std::vector< drawinglayer::texture::B2DHomMatrixAndBColor >& rEntries,
            const basegfx::BColor& rOutmostColor,
            const basegfx::B2DPolygon& rUnitPolygon) const
        {
            // prepare return value
            Primitive2DSequence aRetval(rEntries.size() + 1);

            // get outmost range from object
            basegfx::B2DRange aOutmostRange(getObjectRange());
            basegfx::B2DPolyPolygon aCombinedPolyPoly;

            if(rEntries.size())
            {
                // 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::tools::createPolygonFromRect(aOutmostRange));
            aRetval[0] = Primitive2DReference(
                new PolyPolygonColorPrimitive2D(
                    aCombinedPolyPoly,
                    rOutmostColor));

            if(rEntries.size())
            {
                // reuse first polygon, it's the second one
                aCombinedPolyPoly.remove(0);

                for(sal_uInt32 a(0); a < rEntries.size() - 1; a++)
                {
                    // create next inner polygon, combinbe with last one
                    basegfx::B2DPolygon aNextPoly(rUnitPolygon);

                    aNextPoly.transform(rEntries[a + 1].maB2DHomMatrix);
                    aCombinedPolyPoly.append(aNextPoly);

                    // create primitive with correct color
                    aRetval[a + 1] = Primitive2DReference(
                        new PolyPolygonColorPrimitive2D(
                            aCombinedPolyPoly,
                            rEntries[a].maBColor));

                    // reuse inner polygon, it's the 2nd one
                    aCombinedPolyPoly.remove(0);
                }

                // add last inner polygon with last color
                aRetval[rEntries.size()] = Primitive2DReference(
                    new PolyPolygonColorPrimitive2D(
                        aCombinedPolyPoly,
                        rEntries[rEntries.size() - 1].maBColor));
            }

            return aRetval;
        }

		Primitive2DSequence FillGradientPrimitive2D::createFill(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::tools::createPolygonFromCircle(basegfx::B2DPoint(0.0, 0.0), 1.0);
                    break;
                }
                default: // GRADIENTSTYLE_LINEAR, attribute::GRADIENTSTYLE_AXIAL, attribute::GRADIENTSTYLE_SQUARE, attribute::GRADIENTSTYLE_RECT
                {
                    aUnitPolygon = basegfx::tools::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 aOutmostColor;

            generateMatricesAndColors(aEntries, aOutmostColor);

            if(bOverlapping)
            {
                return createOverlappingFill(aEntries, aOutmostColor, aUnitPolygon);
            }
            else
            {
                return createNonOverlappingFill(aEntries, aOutmostColor, aUnitPolygon);
            }
        }

		Primitive2DSequence FillGradientPrimitive2D::create2DDecomposition(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 fir the old XOR-paint
            // 'trick' of VCL which is recorded in Metafiles; so this version may be
            // used from the MetafilePrimitive2D in it's decomposition.

            if(!getFillGradient().isDefault())
            {
                static bool bOverlapping(true); // allow to test non-overlapping in the debugger

        		return createFill(bOverlapping);
            }
            else
            {
                return Primitive2DSequence();
            }
		}

		FillGradientPrimitive2D::FillGradientPrimitive2D(
			const basegfx::B2DRange& rObjectRange,
			const attribute::FillGradientAttribute& rFillGradient)
		:	BufferedDecompositionPrimitive2D(),
			maObjectRange(rObjectRange),
			maFillGradient(rFillGradient)
		{
		}

		bool FillGradientPrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
		{
			if(BufferedDecompositionPrimitive2D::operator==(rPrimitive))
			{
				const FillGradientPrimitive2D& rCompare = (FillGradientPrimitive2D&)rPrimitive;

				return (getObjectRange() == rCompare.getObjectRange()
					&& getFillGradient() == rCompare.getFillGradient());
			}

			return false;
		}

		basegfx::B2DRange FillGradientPrimitive2D::getB2DRange(const geometry::ViewInformation2D& /*rViewInformation*/) const
		{
			// return ObjectRange
			return getObjectRange();
		}

		// provide unique ID
		ImplPrimitrive2DIDBlock(FillGradientPrimitive2D, PRIMITIVE2D_ID_FILLGRADIENTPRIMITIVE2D)

	} // end of namespace primitive2d
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////
// eof