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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2008 by Sun Microsystems, Inc.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * $RCSfile: b2dhommatrixtools.hxx,v $
+ *
+ * $Revision: 1.2 $
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org. If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef _BGFX_MATRIX_B2DHOMMATRIXTOOLS_HXX
+#define _BGFX_MATRIX_B2DHOMMATRIXTOOLS_HXX
+
+#include <sal/types.h>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/vector/b2dvector.hxx>
+
+///////////////////////////////////////////////////////////////////////////////
+
+namespace basegfx
+{
+ class DecomposedB2DHomMatrixContainer
+ {
+ private:
+ B2DHomMatrix maB2DHomMatrix;
+ B2DVector maScale;
+ B2DVector maTranslate;
+ double mfRotate;
+ double mfShearX;
+
+ // bitfield
+ unsigned mbDecomposed : 1;
+
+ void impCheckDecompose()
+ {
+ if(!mbDecomposed)
+ {
+ maB2DHomMatrix.decompose(maScale, maTranslate, mfRotate, mfShearX);
+ mbDecomposed = true;
+ }
+ }
+
+ public:
+ DecomposedB2DHomMatrixContainer(const B2DHomMatrix& rB2DHomMatrix)
+ : maB2DHomMatrix(rB2DHomMatrix),
+ maScale(),
+ maTranslate(),
+ mfRotate(0.0),
+ mfShearX(0.0),
+ mbDecomposed(false)
+ {
+ }
+
+ // data access
+ const B2DHomMatrix& getB2DHomMatrix() const { return maB2DHomMatrix; }
+ const B2DVector& getScale() const { const_cast< DecomposedB2DHomMatrixContainer* >(this)->impCheckDecompose(); return maScale; }
+ const B2DVector& getTranslate() const { const_cast< DecomposedB2DHomMatrixContainer* >(this)->impCheckDecompose(); return maTranslate; }
+ double getRotate() const { const_cast< DecomposedB2DHomMatrixContainer* >(this)->impCheckDecompose(); return mfRotate; }
+ double getShearX() const { const_cast< DecomposedB2DHomMatrixContainer* >(this)->impCheckDecompose(); return mfShearX; }
+ };
+} // end of namespace basegfx
+
+///////////////////////////////////////////////////////////////////////////////
+
+#endif /* _BGFX_MATRIX_B2DHOMMATRIXTOOLS_HXX */