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// -*- C++ -*-
/* $Id$ */
/* affinetrans.h
*
* Copyright (C) 1999 The gnomemm Development Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <libgnomecanvasmm/affinetrans.h>
#include <libgnomecanvas/gnome-canvas.h>
namespace Gnome
{
namespace Art
{
AffineTrans::AffineTrans(double scale)
{
trans_[0] = scale;
trans_[1] = 0.0;
trans_[2] = 0.0;
trans_[3] = scale;
trans_[4] = 0.0;
trans_[5] = 0.0;
}
AffineTrans::AffineTrans(const double aff[6])
{
trans_[0] = aff[0];
trans_[1] = aff[1];
trans_[2] = aff[2];
trans_[3] = aff[3];
trans_[4] = aff[4];
trans_[5] = aff[5];
}
AffineTrans::AffineTrans(const AffineTrans& src)
{
operator=(src);
}
AffineTrans::~AffineTrans()
{
}
AffineTrans& AffineTrans::operator=(const AffineTrans& src)
{
for(unsigned int i = 0; i < 6; i++)
{
trans_[i] = src.trans_[i];
}
return *this;
}
double&
AffineTrans::operator[](unsigned int idx)
{
if(idx > 5)
{
g_warning("AffineTrans::operator[] called with idx > 5");
return trans_[5]; //0; //Can't convert 0 to double& - throw exception?
}
return trans_[idx];
}
const double&
AffineTrans::operator[](unsigned int idx) const
{
if(idx > 5)
{
g_warning("AffineTrans::operator[] const called with idx > 5");
return trans_[5]; //0; //Can't convert 0 to double& - throw exception?
}
return trans_[idx];
}
Point AffineTrans::apply_to(const Point& p) const
{
Point result;
art_affine_point(result.gobj(), p.gobj(), trans_);
return result;
}
Point AffineTrans::operator*(const Point& p) const
{
return apply_to(p);
}
AffineTrans
AffineTrans::operator*(const AffineTrans& aff2)
{
AffineTrans result;
art_affine_multiply(result.gobj(), gobj(), aff2.gobj());
return result;
}
bool AffineTrans::operator==(const AffineTrans& other) const
{
return (bool)art_affine_equal(const_cast<double*>(trans_),
const_cast<double*>(other.gobj()));
}
bool AffineTrans::operator!=(const AffineTrans& other) const
{
return !(bool)art_affine_equal(const_cast<double*>(trans_),
const_cast<double*>(other.gobj()));
}
void AffineTrans::invert()
{
art_affine_invert(trans_, trans_);
}
void AffineTrans::flip(bool horiz, bool vert)
{
art_affine_flip(trans_, trans_, horiz, vert);
}
bool AffineTrans::rectilinear() const
{
return art_affine_rectilinear(trans_);
}
double AffineTrans::expansion() const
{
return art_affine_expansion(trans_);
}
AffineTrans const &
AffineTrans::operator*=(AffineTrans& other)
{
art_affine_multiply(gobj(), gobj(), other.gobj());
return *this;
}
AffineTrans AffineTrans::identity()
{
AffineTrans tmp;
art_affine_identity(tmp.gobj());
return tmp;
}
AffineTrans
AffineTrans::scaling(double s)
{
return scaling(s, s);
}
AffineTrans
AffineTrans::scaling(double sx, double sy)
{
AffineTrans tmp;
art_affine_scale(tmp.gobj(), sx, sy);
return tmp;
}
AffineTrans
AffineTrans::rotation(double theta)
{
AffineTrans tmp;
art_affine_rotate(tmp.gobj(), theta);
return tmp;
}
AffineTrans
AffineTrans::translation(double dx, double dy)
{
AffineTrans tmp;
art_affine_translate(tmp.gobj(), dx, dy);
return tmp;
}
AffineTrans
AffineTrans::translation(const Point& p)
{
AffineTrans tmp;
art_affine_translate(tmp.gobj(), p.get_x(), p.get_y());
return tmp;
}
AffineTrans
AffineTrans::shearing(double theta)
{
AffineTrans tmp;
art_affine_shear(tmp.gobj(), theta);
return tmp;
}
double* AffineTrans::gobj()
{
return trans_;
}
const double* AffineTrans::gobj() const
{
return trans_;
}
Glib::ustring AffineTrans::to_string() const
{
char pchStr[128];
pchStr[127] = 0; //Just in case art_affine_to_string doesn't work properly.
art_affine_to_string(pchStr, gobj());
return Glib::ustring(pchStr);
}
} //namespace Art
} //namespace Gnome
std::ostream& operator<<(std::ostream& out, const Gnome::Art::AffineTrans& aff)
{
return out << aff.to_string();
}
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