gwenview/lib/imageutils.cpp

   1 // vim: set tabstop=4 shiftwidth=4 noexpandtab:
   2 /*
   3 Gwenview: an image viewer
   4 Copyright 2007 Aurélien Gâteau <aurelien.gateau@free.fr>
   5
   6 This program is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU General Public License
   8 as published by the Free Software Foundation; either version 2
   9 of the License, or (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19
  20 */
  21 #include "imageutils.h"
  22
  23 // Qt
  24 #include <QMatrix>
  25
  26
  27 namespace Gwenview {
  28 namespace ImageUtils {
  29
  30
  31 QMatrix transformMatrix(Orientation orientation) {
  32         QMatrix matrix;
  33         switch (orientation) {
  34         case NOT_AVAILABLE:
  35         case NORMAL:
  36                 break;
  37
  38         case HFLIP:
  39                 matrix.scale(-1,1);
  40                 break;
  41
  42         case ROT_180:
  43                 matrix.rotate(180);
  44                 break;
  45
  46         case VFLIP:
  47                 matrix.scale(1,-1);
  48                 break;
  49
  50         case TRANSPOSE:
  51                 matrix.scale(-1,1);
  52                 matrix.rotate(90);
  53                 break;
  54
  55         case ROT_90:
  56                 matrix.rotate(90);
  57                 break;
  58
  59         case TRANSVERSE:
  60                 matrix.scale(1,-1);
  61                 matrix.rotate(90);
  62                 break;
  63
  64         case ROT_270:
  65                 matrix.rotate(270);
  66                 break;
  67         }
  68
  69         return matrix;
  70 }
  71
  72 } // namespace
  73 } // namespace