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 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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 *************************************************************/



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

#include <drawinglayer/primitive2d/primitivetools2d.hxx>
#include <basegfx/vector/b2dvector.hxx>
#include <drawinglayer/geometry/viewinformation2d.hxx>

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

namespace drawinglayer
{
	namespace primitive2d
	{
		Primitive2DSequence DiscreteMetricDependentPrimitive2D::get2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const
		{
			::osl::MutexGuard aGuard( m_aMutex );

			// get the current DiscreteUnit, look at X and Y and use the maximum
            const basegfx::B2DVector aDiscreteVector(rViewInformation.getInverseObjectToViewTransformation() * basegfx::B2DVector(1.0, 1.0));
            const double fDiscreteUnit(std::min(fabs(aDiscreteVector.getX()), fabs(aDiscreteVector.getY())));

			if(getBuffered2DDecomposition().hasElements() && !basegfx::fTools::equal(fDiscreteUnit, getDiscreteUnit()))
			{
				// conditions of last local decomposition have changed, delete
				const_cast< DiscreteMetricDependentPrimitive2D* >(this)->setBuffered2DDecomposition(Primitive2DSequence());
			}

			if(!getBuffered2DDecomposition().hasElements())
			{
				// remember new valid DiscreteUnit
				const_cast< DiscreteMetricDependentPrimitive2D* >(this)->updateDiscreteUnit(fDiscreteUnit);
			}

			// call base implementation
			return BufferedDecompositionPrimitive2D::get2DDecomposition(rViewInformation);
		}
	} // end of namespace primitive2d
} // end of namespace drawinglayer

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

namespace drawinglayer
{
	namespace primitive2d
	{
		Primitive2DSequence ViewportDependentPrimitive2D::get2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const
		{
			::osl::MutexGuard aGuard( m_aMutex );

			// get the current Viewport
			const basegfx::B2DRange& rViewport = rViewInformation.getViewport();

			if(getBuffered2DDecomposition().hasElements() && !rViewport.equal(getViewport()))
			{
				// conditions of last local decomposition have changed, delete
				const_cast< ViewportDependentPrimitive2D* >(this)->setBuffered2DDecomposition(Primitive2DSequence());
			}

			if(!getBuffered2DDecomposition().hasElements())
			{
				// remember new valid DiscreteUnit
				const_cast< ViewportDependentPrimitive2D* >(this)->maViewport = rViewport;
			}

			// call base implementation
			return BufferedDecompositionPrimitive2D::get2DDecomposition(rViewInformation);
		}
	} // end of namespace primitive2d
} // end of namespace drawinglayer

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

namespace drawinglayer
{
	namespace primitive2d
	{
		Primitive2DSequence ViewTransformationDependentPrimitive2D::get2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const
		{
			::osl::MutexGuard aGuard( m_aMutex );

			// get the current ViewTransformation
			const basegfx::B2DHomMatrix& rViewTransformation = rViewInformation.getViewTransformation();

			if(getBuffered2DDecomposition().hasElements() && rViewTransformation != getViewTransformation())
			{
				// conditions of last local decomposition have changed, delete
				const_cast< ViewTransformationDependentPrimitive2D* >(this)->setBuffered2DDecomposition(Primitive2DSequence());
			}

			if(!getBuffered2DDecomposition().hasElements())
			{
				// remember new valid ViewTransformation
				const_cast< ViewTransformationDependentPrimitive2D* >(this)->maViewTransformation = rViewTransformation;
			}

			// call base implementation
			return BufferedDecompositionPrimitive2D::get2DDecomposition(rViewInformation);
		}
	} // end of namespace primitive2d
} // end of namespace drawinglayer

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

namespace drawinglayer
{
	namespace primitive2d
	{
		Primitive2DSequence ObjectAndViewTransformationDependentPrimitive2D::get2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const
		{
			::osl::MutexGuard aGuard( m_aMutex );

			// get the current ViewTransfromation
			const basegfx::B2DHomMatrix& rViewTransformation = rViewInformation.getViewTransformation();

			if(getBuffered2DDecomposition().hasElements() && rViewTransformation != getViewTransformation())
			{
				// conditions of last local decomposition have changed, delete
				const_cast< ObjectAndViewTransformationDependentPrimitive2D* >(this)->setBuffered2DDecomposition(Primitive2DSequence());
			}

			// get the current ObjectTransformation
			const basegfx::B2DHomMatrix& rObjectTransformation = rViewInformation.getObjectTransformation();

			if(getBuffered2DDecomposition().hasElements() && rObjectTransformation != getObjectTransformation())
			{
				// conditions of last local decomposition have changed, delete
				const_cast< ObjectAndViewTransformationDependentPrimitive2D* >(this)->setBuffered2DDecomposition(Primitive2DSequence());
			}

			if(!getBuffered2DDecomposition().hasElements())
			{
				// remember new valid ViewTransformation, and ObjectTransformation
				const_cast< ObjectAndViewTransformationDependentPrimitive2D* >(this)->maViewTransformation = rViewTransformation;
				const_cast< ObjectAndViewTransformationDependentPrimitive2D* >(this)->maObjectTransformation = rObjectTransformation;
			}

			// call base implementation
			return BufferedDecompositionPrimitive2D::get2DDecomposition(rViewInformation);
		}
	} // end of namespace primitive2d
} // end of namespace drawinglayer

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