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#define __SP_DESKTOP_AFFINE_C__
/*
* Editable view and widget implementation
*
* Author:
* Lauris Kaplinski <lauris@kaplinski.com>
*
* Copyright (C) 1999-2002 Lauris Kaplinski
* Copyright (C) 2000-2001 Ximian, Inc.
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include "desktop.h"
#include "document.h"
#include "sp-root.h"
#include "libnr/nr-matrix-ops.h"
NR::Matrix const sp_desktop_root2dt_affine (SPDesktop const *dt)
{
SPRoot const *root = SP_ROOT(SP_DOCUMENT_ROOT(dt->doc()));
return root->c2p * dt->doc2dt();
}
NR::Matrix const sp_desktop_dt2root_affine (SPDesktop const *dt)
{
return sp_desktop_root2dt_affine(dt).inverse();
}
NR::Point sp_desktop_root2dt_xy_point(SPDesktop const *dt, NR::Point const p)
{
return p * sp_desktop_root2dt_affine(dt);
}
NR::Point sp_desktop_dt2root_xy_point(SPDesktop const *dt, NR::Point const p)
{
return p * sp_desktop_dt2root_affine(dt);
}
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