cinelerra-5.1/cinelerra/rescale.C

   1 #include "rescale.h"
   2 #include "indexable.h"
   3 #include "language.h"
   4 #include "mwindow.h"
   5
   6 const char *Rescale::scale_types[] = {
   7   N_("None"), N_("Scaled"), N_("Cropped"), N_("Filled"), N_("Horiz Edge"), N_("Vert Edge"),
   8 };
   9
  10 Rescale::Rescale(int w, int h, double aspect)
  11 {
  12         this->w = w;
  13         this->h = h;
  14         this->aspect = aspect;
  15 }
  16
  17 Rescale::Rescale(Indexable *in)
  18 {
  19         this->w = in->get_w();
  20         this->h = in->get_h();
  21         float aw, ah;
  22         MWindow::create_aspect_ratio(aw, ah, this->w, this->h);
  23         this->aspect = ah > 0 ? aw / ah : 1;
  24 }
  25
  26 Rescale::~Rescale()
  27 {
  28 }
  29
  30 void Rescale::rescale(Rescale &out, int type,
  31                 float &src_w,float &src_h, float &dst_w,float &dst_h)
  32 {
  33         int in_w = w, in_h = h;
  34         int out_w = out.w, out_h = out.h;
  35
  36         src_w = in_w;  src_h = in_h;
  37         dst_w = out_w; dst_h = out_h;
  38         double r = out.aspect / aspect;
  39
  40         switch( type ) {
  41         case cropped:
  42                 if( r < 1 )
  43                         src_w = in_w * r;
  44                 else
  45                         src_h = in_h / r;
  46                 break;
  47         case filled:
  48                 if( r < 1 )
  49                         dst_h = out_h * r;
  50                 else
  51                         dst_w = out_w / r;
  52                 break;
  53         case horiz_edge:
  54                 if( r < 1 )
  55                         dst_h = out_h * r;
  56                 else
  57                         src_h = in_h / r;
  58                 break;
  59         case vert_edge:
  60                 if( r < 1 )
  61                         src_w = in_w * r;
  62                 else
  63                         dst_w = out_w / r;
  64                 break;
  65         default:
  66                 break;
  67         }
  68 }
  69