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457 | /* -*- 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 .
*/
#include <basegfx/matrix/b2dhommatrixtools.hxx>
#include <basegfx/range/b2drange.hxx>
#include <osl/diagnose.h>
namespace basegfx::utils
{
void createSinCosOrthogonal(double& o_rSin, double& o_rCos, double fRadiant)
{
if( fTools::equalZero( fmod( fRadiant, F_PI2 ) ) )
{
// determine quadrant
const sal_Int32 nQuad(
(4 + fround( 4/F_2PI*fmod( fRadiant, F_2PI ) )) % 4 );
switch( nQuad )
{
case 0: // -2pi,0,2pi
o_rSin = 0.0;
o_rCos = 1.0;
break;
case 1: // -3/2pi,1/2pi
o_rSin = 1.0;
o_rCos = 0.0;
break;
case 2: // -pi,pi
o_rSin = 0.0;
o_rCos = -1.0;
break;
case 3: // -1/2pi,3/2pi
o_rSin = -1.0;
o_rCos = 0.0;
break;
default:
OSL_FAIL( "createSinCos: Impossible case reached" );
}
}
else
{
// TODO(P1): Maybe use glibc's sincos here (though
// that's kinda non-portable...)
o_rSin = sin(fRadiant);
o_rCos = cos(fRadiant);
}
}
B2DHomMatrix createScaleB2DHomMatrix(double fScaleX, double fScaleY)
{
B2DHomMatrix aRetval;
const double fOne(1.0);
if(!fTools::equal(fScaleX, fOne))
{
aRetval.set(0, 0, fScaleX);
}
if(!fTools::equal(fScaleY, fOne))
{
aRetval.set(1, 1, fScaleY);
}
return aRetval;
}
B2DHomMatrix createShearXB2DHomMatrix(double fShearX)
{
B2DHomMatrix aRetval;
if(!fTools::equalZero(fShearX))
{
aRetval.set(0, 1, fShearX);
}
return aRetval;
}
B2DHomMatrix createShearYB2DHomMatrix(double fShearY)
{
B2DHomMatrix aRetval;
if(!fTools::equalZero(fShearY))
{
aRetval.set(1, 0, fShearY);
}
return aRetval;
}
B2DHomMatrix createRotateB2DHomMatrix(double fRadiant)
{
B2DHomMatrix aRetval;
if(!fTools::equalZero(fRadiant))
{
double fSin(0.0);
double fCos(1.0);
createSinCosOrthogonal(fSin, fCos, fRadiant);
aRetval.set(0, 0, fCos);
aRetval.set(1, 1, fCos);
aRetval.set(1, 0, fSin);
aRetval.set(0, 1, -fSin);
}
return aRetval;
}
B2DHomMatrix createTranslateB2DHomMatrix(double fTranslateX, double fTranslateY)
{
B2DHomMatrix aRetval;
if(!(fTools::equalZero(fTranslateX) && fTools::equalZero(fTranslateY)))
{
aRetval.set(0, 2, fTranslateX);
aRetval.set(1, 2, fTranslateY);
}
return aRetval;
}
B2DHomMatrix createScaleShearXRotateTranslateB2DHomMatrix(
double fScaleX, double fScaleY,
double fShearX,
double fRadiant,
double fTranslateX, double fTranslateY)
{
const double fOne(1.0);
if(fTools::equal(fScaleX, fOne) && fTools::equal(fScaleY, fOne))
{
/// no scale, take shortcut
return createShearXRotateTranslateB2DHomMatrix(fShearX, fRadiant, fTranslateX, fTranslateY);
}
else
{
/// scale used
if(fTools::equalZero(fShearX))
{
/// no shear
if(fTools::equalZero(fRadiant))
{
/// no rotate, take shortcut
return createScaleTranslateB2DHomMatrix(fScaleX, fScaleY, fTranslateX, fTranslateY);
}
else
{
/// rotate and scale used, no shear
double fSin(0.0);
double fCos(1.0);
createSinCosOrthogonal(fSin, fCos, fRadiant);
B2DHomMatrix aRetval(
/* Row 0, Column 0 */ fCos * fScaleX,
/* Row 0, Column 1 */ fScaleY * -fSin,
/* Row 0, Column 2 */ fTranslateX,
/* Row 1, Column 0 */ fSin * fScaleX,
/* Row 1, Column 1 */ fScaleY * fCos,
/* Row 1, Column 2 */ fTranslateY);
return aRetval;
}
}
else
{
/// scale and shear used
if(fTools::equalZero(fRadiant))
{
/// scale and shear, but no rotate
B2DHomMatrix aRetval(
/* Row 0, Column 0 */ fScaleX,
/* Row 0, Column 1 */ fScaleY * fShearX,
/* Row 0, Column 2 */ fTranslateX,
/* Row 1, Column 0 */ 0.0,
/* Row 1, Column 1 */ fScaleY,
/* Row 1, Column 2 */ fTranslateY);
return aRetval;
}
else
{
/// scale, shear and rotate used
double fSin(0.0);
double fCos(1.0);
createSinCosOrthogonal(fSin, fCos, fRadiant);
B2DHomMatrix aRetval(
/* Row 0, Column 0 */ fCos * fScaleX,
/* Row 0, Column 1 */ fScaleY * ((fCos * fShearX) - fSin),
/* Row 0, Column 2 */ fTranslateX,
/* Row 1, Column 0 */ fSin * fScaleX,
/* Row 1, Column 1 */ fScaleY * ((fSin * fShearX) + fCos),
/* Row 1, Column 2 */ fTranslateY);
return aRetval;
}
}
}
}
B2DHomMatrix createShearXRotateTranslateB2DHomMatrix(
double fShearX,
double fRadiant,
double fTranslateX, double fTranslateY)
{
if(fTools::equalZero(fShearX))
{
/// no shear
if(fTools::equalZero(fRadiant))
{
/// no shear, no rotate, take shortcut
return createTranslateB2DHomMatrix(fTranslateX, fTranslateY);
}
else
{
/// no shear, but rotate used
double fSin(0.0);
double fCos(1.0);
createSinCosOrthogonal(fSin, fCos, fRadiant);
B2DHomMatrix aRetval(
/* Row 0, Column 0 */ fCos,
/* Row 0, Column 1 */ -fSin,
/* Row 0, Column 2 */ fTranslateX,
/* Row 1, Column 0 */ fSin,
/* Row 1, Column 1 */ fCos,
/* Row 1, Column 2 */ fTranslateY);
return aRetval;
}
}
else
{
/// shear used
if(fTools::equalZero(fRadiant))
{
/// no rotate, but shear used
B2DHomMatrix aRetval(
/* Row 0, Column 0 */ 1.0,
/* Row 0, Column 1 */ fShearX,
/* Row 0, Column 2 */ fTranslateX,
/* Row 1, Column 0 */ 0.0,
/* Row 1, Column 1 */ 1.0,
/* Row 1, Column 2 */ fTranslateY);
return aRetval;
}
else
{
/// shear and rotate used
double fSin(0.0);
double fCos(1.0);
createSinCosOrthogonal(fSin, fCos, fRadiant);
B2DHomMatrix aRetval(
/* Row 0, Column 0 */ fCos,
/* Row 0, Column 1 */ (fCos * fShearX) - fSin,
/* Row 0, Column 2 */ fTranslateX,
/* Row 1, Column 0 */ fSin,
/* Row 1, Column 1 */ (fSin * fShearX) + fCos,
/* Row 1, Column 2 */ fTranslateY);
return aRetval;
}
}
}
B2DHomMatrix createScaleTranslateB2DHomMatrix(
double fScaleX, double fScaleY,
double fTranslateX, double fTranslateY)
{
const double fOne(1.0);
if(fTools::equal(fScaleX, fOne) && fTools::equal(fScaleY, fOne))
{
/// no scale, take shortcut
return createTranslateB2DHomMatrix(fTranslateX, fTranslateY);
}
else
{
/// scale used
if(fTools::equalZero(fTranslateX) && fTools::equalZero(fTranslateY))
{
/// no translate, but scale.
B2DHomMatrix aRetval;
aRetval.set(0, 0, fScaleX);
aRetval.set(1, 1, fScaleY);
return aRetval;
}
else
{
/// translate and scale
B2DHomMatrix aRetval(
/* Row 0, Column 0 */ fScaleX,
/* Row 0, Column 1 */ 0.0,
/* Row 0, Column 2 */ fTranslateX,
/* Row 1, Column 0 */ 0.0,
/* Row 1, Column 1 */ fScaleY,
/* Row 1, Column 2 */ fTranslateY);
return aRetval;
}
}
}
B2DHomMatrix createRotateAroundPoint(
double fPointX, double fPointY,
double fRadiant)
{
B2DHomMatrix aRetval;
if(!fTools::equalZero(fRadiant))
{
double fSin(0.0);
double fCos(1.0);
createSinCosOrthogonal(fSin, fCos, fRadiant);
aRetval.set3x2(
/* Row 0, Column 0 */ fCos,
/* Row 0, Column 1 */ -fSin,
/* Row 0, Column 2 */ (fPointX * (1.0 - fCos)) + (fSin * fPointY),
/* Row 1, Column 0 */ fSin,
/* Row 1, Column 1 */ fCos,
/* Row 1, Column 2 */ (fPointY * (1.0 - fCos)) - (fSin * fPointX));
}
return aRetval;
}
BASEGFX_DLLPUBLIC B2DHomMatrix createRotateAroundCenterKeepAspectRatioStayInsideRange(<--- The function 'createRotateAroundCenterKeepAspectRatioStayInsideRange' is never used.
const basegfx::B2DRange& rTargetRange,
double fRotate)
{
basegfx::B2DHomMatrix aRetval;
// RotGrfFlyFrame: Create a transformation that maps the range inside of itself
// so that it fits, takes as much space as possible and keeps the aspect ratio
if(0.0 != fRotate)
{
// Fit rotated graphic to center of available space, keeping page ratio:
// Adapt scaling ratio of unit object and rotate it
aRetval.scale(1.0, rTargetRange.getHeight() / rTargetRange.getWidth());
aRetval.rotate(fRotate);
// get the range to see where we are in unit coordinates
basegfx::B2DRange aFullRange(0.0, 0.0, 1.0, 1.0);
aFullRange.transform(aRetval);
// detect needed scales in X/Y and choose the smallest for staying inside the
// available space while keeping aspect ratio of the source
const double fScaleX(rTargetRange.getWidth() / aFullRange.getWidth());
const double fScaleY(rTargetRange.getHeight() / aFullRange.getHeight());
const double fScaleMin(std::min(fScaleX, fScaleY));
// TopLeft to zero, then scale, then move to center of available space
aRetval.translate(-aFullRange.getMinX(), -aFullRange.getMinY());
aRetval.scale(fScaleMin, fScaleMin);
aRetval.translate(
rTargetRange.getCenterX() - (0.5 * fScaleMin * aFullRange.getWidth()),
rTargetRange.getCenterY() - (0.5 * fScaleMin * aFullRange.getHeight()));
}
else
{
// just scale/translate needed
aRetval *= createScaleTranslateB2DHomMatrix(
rTargetRange.getRange(),
rTargetRange.getMinimum());
}
return aRetval;
}
/// special for the case to map from source range to target range
B2DHomMatrix createSourceRangeTargetRangeTransform(
const B2DRange& rSourceRange,
const B2DRange& rTargetRange)
{
B2DHomMatrix aRetval;
if(&rSourceRange == &rTargetRange)
{
return aRetval;
}
if(!fTools::equalZero(rSourceRange.getMinX()) || !fTools::equalZero(rSourceRange.getMinY()))
{
aRetval.set(0, 2, -rSourceRange.getMinX());
aRetval.set(1, 2, -rSourceRange.getMinY());
}
const double fSourceW(rSourceRange.getWidth());
const double fSourceH(rSourceRange.getHeight());
const bool bDivX(!fTools::equalZero(fSourceW) && !fTools::equal(fSourceW, 1.0));
const bool bDivY(!fTools::equalZero(fSourceH) && !fTools::equal(fSourceH, 1.0));
const double fScaleX(bDivX ? rTargetRange.getWidth() / fSourceW : rTargetRange.getWidth());
const double fScaleY(bDivY ? rTargetRange.getHeight() / fSourceH : rTargetRange.getHeight());
if(!fTools::equalZero(fScaleX) || !fTools::equalZero(fScaleY))
{
aRetval.scale(fScaleX, fScaleY);
}
if(!fTools::equalZero(rTargetRange.getMinX()) || !fTools::equalZero(rTargetRange.getMinY()))
{
aRetval.translate(
rTargetRange.getMinX(),
rTargetRange.getMinY());
}
return aRetval;
}
B2DHomMatrix createCoordinateSystemTransform(
const B2DPoint& rOrigin,
const B2DVector& rX,
const B2DVector& rY)
{
return basegfx::B2DHomMatrix(
rX.getX(), rY.getX(), rOrigin.getX(),
rX.getY(), rY.getY(), rOrigin.getY());
}
B2DTuple getColumn(const B2DHomMatrix& rMatrix, sal_uInt16 nCol)
{
return B2DTuple(rMatrix.get(0, nCol), rMatrix.get(1, nCol));
}
} // end of namespace
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|