xref: /AOO41X/main/drawinglayer/source/primitive2d/fillgradientprimitive2d.cxx (revision cdf0e10c4e3984b49a9502b011690b615761d4a3)

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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< basegfx::B2DHomMatrix >& rMatrices,
            std::vector< basegfx::BColor >& rColors) const
        {
            rMatrices.clear();
            rColors.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.appendTransformations(rMatrices);
					aGradient.appendColors(rColors);
					break;
				}
				case attribute::GRADIENTSTYLE_AXIAL:
				{
					texture::GeoTexSvxGradientAxial aGradient(getObjectRange(), aStart, aEnd, nSteps, getFillGradient().getBorder(), getFillGradient().getAngle());
					aGradient.appendTransformations(rMatrices);
					aGradient.appendColors(rColors);
					break;
				}
				case attribute::GRADIENTSTYLE_RADIAL:
				{
					texture::GeoTexSvxGradientRadial aGradient(getObjectRange(), aStart, aEnd, nSteps, getFillGradient().getBorder(), getFillGradient().getOffsetX(), getFillGradient().getOffsetY());
					aGradient.appendTransformations(rMatrices);
					aGradient.appendColors(rColors);
					break;
				}
				case attribute::GRADIENTSTYLE_ELLIPTICAL:
				{
					texture::GeoTexSvxGradientElliptical aGradient(getObjectRange(), aStart, aEnd, nSteps, getFillGradient().getBorder(), getFillGradient().getOffsetX(), getFillGradient().getOffsetY(), getFillGradient().getAngle());
					aGradient.appendTransformations(rMatrices);
					aGradient.appendColors(rColors);
					break;
				}
				case attribute::GRADIENTSTYLE_SQUARE:
				{
					texture::GeoTexSvxGradientSquare aGradient(getObjectRange(), aStart, aEnd, nSteps, getFillGradient().getBorder(), getFillGradient().getOffsetX(), getFillGradient().getOffsetY(), getFillGradient().getAngle());
					aGradient.appendTransformations(rMatrices);
					aGradient.appendColors(rColors);
					break;
				}
				case attribute::GRADIENTSTYLE_RECT:
				{
					texture::GeoTexSvxGradientRect aGradient(getObjectRange(), aStart, aEnd, nSteps, getFillGradient().getBorder(), getFillGradient().getOffsetX(), getFillGradient().getOffsetY(), getFillGradient().getAngle());
					aGradient.appendTransformations(rMatrices);
					aGradient.appendColors(rColors);
					break;
				}
			}
        }

        Primitive2DSequence FillGradientPrimitive2D::createOverlappingFill(
            const std::vector< basegfx::B2DHomMatrix >& rMatrices,
            const std::vector< basegfx::BColor >& rColors,
            const basegfx::B2DPolygon& rUnitPolygon) const
        {
			// prepare return value
			Primitive2DSequence aRetval(rColors.size() ? rMatrices.size() + 1 : rMatrices.size());

            // create solid fill with start color
		    if(rColors.size())
		    {
			    // create primitive
			    const Primitive2DReference xRef(
                    new PolyPolygonColorPrimitive2D(
                        basegfx::B2DPolyPolygon(basegfx::tools::createPolygonFromRect(getObjectRange())),
                        rColors[0]));
			    aRetval[0] = xRef;
		    }

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

			    // create solid fill
			    const Primitive2DReference xRef(
                    new PolyPolygonColorPrimitive2D(
                        basegfx::B2DPolyPolygon(aNewPoly),
                        rColors[a + 1]));
			    aRetval[a + 1] = xRef;
		    }

            return aRetval;
        }

        Primitive2DSequence FillGradientPrimitive2D::createNonOverlappingFill(
            const std::vector< basegfx::B2DHomMatrix >& rMatrices,
            const std::vector< basegfx::BColor >& rColors,
            const basegfx::B2DPolygon& rUnitPolygon) const
        {
			// prepare return value
			Primitive2DSequence aRetval;
            const sal_uInt32 nMatricesSize(rMatrices.size());

            if(nMatricesSize)
            {
			    basegfx::B2DPolygon aOuterPoly(rUnitPolygon);
			    aOuterPoly.transform(rMatrices[0]);
                basegfx::B2DPolyPolygon aCombinedPolyPoly(aOuterPoly);
    			const sal_uInt32 nEntryCount(rColors.size() ? rMatrices.size() + 1 : rMatrices.size());
                sal_uInt32 nIndex(0);

                aRetval.realloc(nEntryCount);

		        if(rColors.size())
		        {
                    basegfx::B2DRange aOuterPolyRange(aOuterPoly.getB2DRange());
                    aOuterPolyRange.expand(getObjectRange());
                    aCombinedPolyPoly.append(basegfx::tools::createPolygonFromRect(aOuterPolyRange));
                    aRetval[nIndex++] = Primitive2DReference(new PolyPolygonColorPrimitive2D(aCombinedPolyPoly, rColors[0]));
                    aCombinedPolyPoly = basegfx::B2DPolyPolygon(aOuterPoly);
                }

                for(sal_uInt32 a(1); a < nMatricesSize - 1; a++)
		        {
                    basegfx::B2DPolygon aInnerPoly(rUnitPolygon);
			        aInnerPoly.transform(rMatrices[a]);
                    aCombinedPolyPoly.append(aInnerPoly);
			        aRetval[nIndex++] = Primitive2DReference(new PolyPolygonColorPrimitive2D(aCombinedPolyPoly, rColors[a]));
                    aCombinedPolyPoly = basegfx::B2DPolyPolygon(aInnerPoly);
                }

		        if(rColors.size())
		        {
                    aRetval[nIndex] = Primitive2DReference(new PolyPolygonColorPrimitive2D(
                        aCombinedPolyPoly, rColors[rColors.size() - 1]));
                }
            }

            return aRetval;
        }

		Primitive2DSequence FillGradientPrimitive2D::createFill(bool bOverlapping) const
		{
            // prepare shape of the Unit Polygon
			basegfx::B2DPolygon aUnitPolygon;

			if(attribute::GRADIENTSTYLE_RADIAL == getFillGradient().getStyle()
                || attribute::GRADIENTSTYLE_ELLIPTICAL == getFillGradient().getStyle())
			{
				aUnitPolygon = basegfx::tools::createPolygonFromCircle(
                    basegfx::B2DPoint(0,0), 1);
			}
			else if(attribute::GRADIENTSTYLE_LINEAR == maFillGradient.getStyle())
			{
				aUnitPolygon = basegfx::tools::createPolygonFromRect(basegfx::B2DRange(0, 0, 1, 1));
			}
			else
			{
				aUnitPolygon = basegfx::tools::createPolygonFromRect(basegfx::B2DRange(-1, -1, 1, 1));
			}

            // get the transform matrices and colors (where colors
            // will have one more entry that matrices)
			std::vector< basegfx::B2DHomMatrix > aMatrices;
			std::vector< basegfx::BColor > aColors;
            generateMatricesAndColors(aMatrices, aColors);

            if(bOverlapping)
            {
                return createOverlappingFill(aMatrices, aColors, aUnitPolygon);
            }
            else
            {
                return createNonOverlappingFill(aMatrices, aColors, 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())
            {
        		return createFill(true);
            }
            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