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+/* -*- 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 .
+ */
+
+#pragma once
+
+#include <sal/types.h>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/vector/b2dvector.hxx>
+#include <basegfx/point/b2dpoint.hxx>
+#include <basegfx/tuple/b2dtuple.hxx>
+#include <utility>
+#include <basegfx/basegfxdllapi.h>
+
+namespace basegfx { class B2DRange; }
+
+namespace basegfx::utils
+{
+ /** If the rotation angle is an approximate multiple of pi/2,
+ force fSin/fCos to -1/0/1, to maintain orthogonality (which
+ might also be advantageous for the other cases, but: for
+ multiples of pi/2, the exact values _can_ be attained. It
+ would be largely unintuitive, if a 180 degrees rotation
+ would introduce slight roundoff errors, instead of exactly
+ mirroring the coordinate system)
+ */
+ void createSinCosOrthogonal(double& o_rSin, double& rCos, double fRadiant);
+
+ /** Tooling methods for on-the-fly matrix generation e.g. for inline
+ multiplications
+ */
+ BASEGFX_DLLPUBLIC B2DHomMatrix createScaleB2DHomMatrix(double fScaleX, double fScaleY);
+ BASEGFX_DLLPUBLIC B2DHomMatrix createShearXB2DHomMatrix(double fShearX);
+ BASEGFX_DLLPUBLIC B2DHomMatrix createShearYB2DHomMatrix(double fShearY);
+ BASEGFX_DLLPUBLIC B2DHomMatrix createRotateB2DHomMatrix(double fRadiant);
+ BASEGFX_DLLPUBLIC B2DHomMatrix createTranslateB2DHomMatrix(double fTranslateX, double fTranslateY);
+
+ /// inline versions for parameters as tuples
+ inline B2DHomMatrix createScaleB2DHomMatrix(const B2DTuple& rScale)
+ {
+ return createScaleB2DHomMatrix(rScale.getX(), rScale.getY());
+ }
+
+ inline B2DHomMatrix createTranslateB2DHomMatrix(const B2DTuple& rTranslate)
+ {
+ return createTranslateB2DHomMatrix(rTranslate.getX(), rTranslate.getY());
+ }
+
+ /** Tooling methods for faster completely combined matrix creation
+ when scale, shearX, rotation and translation needs to be done in
+ exactly that order. It's faster since it directly calculates
+ each matrix value based on a symbolic calculation of the three
+ matrix multiplications.
+ Inline versions for parameters as tuples added, too.
+ */
+ BASEGFX_DLLPUBLIC B2DHomMatrix createScaleShearXRotateTranslateB2DHomMatrix(
+ double fScaleX, double fScaleY,
+ double fShearX,
+ double fRadiant,
+ double fTranslateX, double fTranslateY);
+ inline B2DHomMatrix createScaleShearXRotateTranslateB2DHomMatrix(
+ const B2DTuple& rScale,
+ double fShearX,
+ double fRadiant,
+ const B2DTuple& rTranslate)
+ {
+ return createScaleShearXRotateTranslateB2DHomMatrix(
+ rScale.getX(), rScale.getY(),
+ fShearX,
+ fRadiant,
+ rTranslate.getX(), rTranslate.getY());
+ }
+
+ BASEGFX_DLLPUBLIC B2DHomMatrix createShearXRotateTranslateB2DHomMatrix(
+ double fShearX,
+ double fRadiant,
+ double fTranslateX, double fTranslateY);
+ inline B2DHomMatrix createShearXRotateTranslateB2DHomMatrix(
+ double fShearX,
+ double fRadiant,
+ const B2DTuple& rTranslate)
+ {
+ return createShearXRotateTranslateB2DHomMatrix(
+ fShearX,
+ fRadiant,
+ rTranslate.getX(), rTranslate.getY());
+ }
+
+ BASEGFX_DLLPUBLIC B2DHomMatrix createScaleTranslateB2DHomMatrix(
+ double fScaleX, double fScaleY,
+ double fTranslateX, double fTranslateY);
+ inline B2DHomMatrix createScaleTranslateB2DHomMatrix(
+ const B2DTuple& rScale,
+ const B2DTuple& rTranslate)
+ {
+ return createScaleTranslateB2DHomMatrix(
+ rScale.getX(), rScale.getY(),
+ rTranslate.getX(), rTranslate.getY());
+ }
+
+ /// special for the often used case of rotation around a point
+ BASEGFX_DLLPUBLIC B2DHomMatrix createRotateAroundPoint(
+ double fPointX, double fPointY,
+ double fRadiant);
+ inline B2DHomMatrix createRotateAroundPoint(
+ const B2DTuple& rPoint,
+ double fRadiant)
+ {
+ return createRotateAroundPoint(
+ rPoint.getX(), rPoint.getY(),
+ fRadiant);
+ }
+
+ /// special for creating a mapping for a Range rotated around it's center
+ /// while keeping AspectRatio unchanged and staying inside the given Range
+ /// by optimally using the available space (no overlap or outside allowed)
+ B2DHomMatrix createRotateAroundCenterKeepAspectRatioStayInsideRange(
+ const basegfx::B2DRange& rTargetRange,
+ double fRotate);
+
+ /// special for the case to map from source range to target range
+ BASEGFX_DLLPUBLIC B2DHomMatrix createSourceRangeTargetRangeTransform(
+ const B2DRange& rSourceRange,
+ const B2DRange& rTargetRange);
+
+ /// create based on given CoordinateSystem which is defined by origin and x/yaxis
+ BASEGFX_DLLPUBLIC B2DHomMatrix createCoordinateSystemTransform(
+ const B2DPoint& rOrigin,
+ const B2DVector& rX,
+ const B2DVector& rY);
+
+ /// get column vector from B2dHomMatrix, e.g. to extract coordinate system origin and x/yaxis
+ BASEGFX_DLLPUBLIC B2DTuple getColumn(const B2DHomMatrix& rMatrix, sal_uInt16 nCol);
+
+
+ class BASEGFX_DLLPUBLIC B2DHomMatrixBufferedDecompose
+ {
+ private:
+ B2DVector maScale;
+ B2DVector maTranslate;
+ double mfRotate;
+ double mfShearX;
+
+ public:
+ B2DHomMatrixBufferedDecompose(const B2DHomMatrix& rB2DHomMatrix = B2DHomMatrix())
+ : mfRotate(0.0),
+ mfShearX(0.0)
+ {
+ rB2DHomMatrix.decompose(maScale, maTranslate, mfRotate, mfShearX);
+ }
+
+ // data access
+ B2DHomMatrix getB2DHomMatrix() const
+ {
+ return createScaleShearXRotateTranslateB2DHomMatrix(
+ maScale, mfShearX, mfRotate, maTranslate);
+ }
+
+ const B2DVector& getScale() const { return maScale; }
+ const B2DVector& getTranslate() const { return maTranslate; }
+ double getRotate() const { return mfRotate; }
+ double getShearX() const { return mfShearX; }
+ };
+
+ class BASEGFX_DLLPUBLIC B2DHomMatrixBufferedOnDemandDecompose
+ {
+ private:
+ B2DHomMatrix maB2DHomMatrix;
+ B2DVector maScale;
+ B2DVector maTranslate;
+ double mfRotate;
+ double mfShearX;
+
+ bool mbDecomposed : 1;
+
+ void impCheckDecompose()
+ {
+ if(!mbDecomposed)
+ {
+ maB2DHomMatrix.decompose(maScale, maTranslate, mfRotate, mfShearX);
+ mbDecomposed = true;
+ }
+ }
+
+ public:
+ B2DHomMatrixBufferedOnDemandDecompose(B2DHomMatrix aB2DHomMatrix = B2DHomMatrix())
+ : maB2DHomMatrix(std::move(aB2DHomMatrix)),
+ mfRotate(0.0),
+ mfShearX(0.0),
+ mbDecomposed(false)
+ {
+ }
+
+ // data access
+ const B2DHomMatrix& getB2DHomMatrix() const { return maB2DHomMatrix; }
+ const B2DVector& getScale() const { const_cast< B2DHomMatrixBufferedOnDemandDecompose* >(this)->impCheckDecompose(); return maScale; }
+ const B2DVector& getTranslate() const { const_cast< B2DHomMatrixBufferedOnDemandDecompose* >(this)->impCheckDecompose(); return maTranslate; }
+ double getRotate() const { const_cast< B2DHomMatrixBufferedOnDemandDecompose* >(this)->impCheckDecompose(); return mfRotate; }
+ double getShearX() const { const_cast< B2DHomMatrixBufferedOnDemandDecompose* >(this)->impCheckDecompose(); return mfShearX; }
+ };
+} // end of namespace basegfx::utils
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */