src/graphics/GraphicsImage.C

   1 /*
   2  * \file GraphicsImage.C
   3  * Copyright 2002 the LyX Team
   4  * Read the file COPYING
   5  *
   6  * \author Baruch Even <baruch.even@writeme.com>
   7  * \author Angus Leeming <a.leeming@ic.ac.uk>
   8  */
   9
  10 #include <config.h>
  11
  12 #ifdef __GNUG__
  13 #pragma implementation
  14 #endif
  15
  16 #include "GraphicsImage.h"
  17 #include "GraphicsParams.h"
  18
  19 namespace grfx {
  20
  21 // This will be connected to a function that will return whichever
  22 // whichever derived class we desire.
  23 boost::signal0<ImagePtr> GImage::newImage;
  24
  25 /// Return the list of loadable formats.
  26 boost::signal0<GImage::FormatList> GImage::loadableFormats;
  27
  28 std::pair<unsigned int, unsigned int>
  29 GImage::getScaledDimensions(GParams const & params) const
  30 {
  31         if (params.scale == 0 && params.width == 0 && params.height == 0)
  32                 // No scaling
  33                 return std::make_pair(getWidth(), getHeight());
  34
  35         typedef unsigned int dimension;
  36         dimension width  = 0;
  37         dimension height = 0;
  38         if (params.scale != 0) {
  39                 width  = dimension(getWidth()  * params.scale / 100.0);
  40                 height = dimension(getHeight() * params.scale / 100.0);
  41         } else {
  42                 width  = params.width;
  43                 height = params.height;
  44
  45                 if (width == 0) {
  46                         width = height * getWidth() / getHeight();
  47                 } else if (height == 0) {
  48                         height = width * getHeight() / getWidth();
  49                 }
  50         }
  51
  52         if (width == 0 || height == 0)
  53                 // Something is wrong!
  54                 return std::make_pair(getWidth(), getHeight());
  55
  56         return std::make_pair(width, height);
  57 }
  58
  59 } // namespace grfx