Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 218 insertions, 0 deletions

diff --git a/include/basegfx/matrix/b2dhommatrixtools.hxx b/include/basegfx/matrix/b2dhommatrixtools.hxx
new file mode 100644
index 000000000..9b81f33d2
--- /dev/null
+++ b/include/basegfx/matrix/b2dhommatrixtools.hxx
@@ -0,0 +1,218 @@
+/* -*- 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: */