Hello all, I am attempting to load a 16-bit PGM (max colours 65535) using Fl_PNM_Image and then access the raw 16-bit values. The image file does load and does display. However, upon closer inspection it appears the the Fl_PNM_Image() is binning the 16-bit to 8-bit. The reason I say this is here:
Fl_PNM_Image.cxx: line 174: *ptr++ = (255*val)/maxval; For me, this is more cleanly seen as: *ptr++ = 255*(val/maxval); Is there a reason why the Fl_PNM_Image ctor needs to convert the 16-bit values to 8-bit? I understand that the underlying buffer (e.g. ptr) is uchar but that shouldn't make a difference as long as Fl_PNM_Image::d() returns 2? Or is there some core need for 8-bit values...perhaps fl_draw_image()?? Cheers, Alvin _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
