src/desktop-affine.cpp

   1 #define __SP_DESKTOP_AFFINE_C__
   2
   3 /*
   4  * Editable view and widget implementation
   5  *
   6  * Author:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *
   9  * Copyright (C) 1999-2002 Lauris Kaplinski
  10  * Copyright (C) 2000-2001 Ximian, Inc.
  11  *
  12  * Released under GNU GPL, read the file 'COPYING' for more information
  13  */
  14
  15 #include "desktop.h"
  16 //#include "document.h"
  17 //#include "sp-root.h"
  18 //#include "libnr/nr-matrix-ops.h"
  19
  20 Geom::Matrix const sp_desktop_dt2doc_affine (SPDesktop const *dt)
  21 {
  22     return dt->doc2dt().inverse();
  23 }
  24
  25 Geom::Point sp_desktop_dt2doc_xy_point(SPDesktop const *dt, Geom::Point const p)
  26 {
  27     return p * sp_desktop_dt2doc_affine(dt);
  28 }
  29
  30 #if 0
  31 Geom::Matrix const sp_desktop_root2dt_affine (SPDesktop const *dt)
  32 {
  33         SPRoot const *root = SP_ROOT(SP_DOCUMENT_ROOT(dt->doc()));
  34         return root->c2p * dt->doc2dt();
  35 }
  36
  37 Geom::Matrix const sp_desktop_dt2root_affine (SPDesktop const *dt)
  38 {
  39         return sp_desktop_root2dt_affine(dt).inverse();
  40 }
  41
  42 Geom::Point sp_desktop_root2dt_xy_point(SPDesktop const *dt, Geom::Point const p)
  43 {
  44         return p * sp_desktop_root2dt_affine(dt);
  45 }
  46
  47 Geom::Point sp_desktop_dt2root_xy_point(SPDesktop const *dt, Geom::Point const p)
  48 {
  49         return p * sp_desktop_dt2root_affine(dt);
  50 }
  51 #endif
  52