#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); }