IMG_File : tag handling

[nicholas_yue]

Hi,

 

  I see that other formats have available tags.

 

  I am wondering how those are setup.

 

  I tried setting things up in my

 

        class IMG_PPMFormat : public IMG_Format {

                virtual void        defaultTags(IMG_FileTagList &tags) const

                   {

                   tags.setTag("binary","off");

                   }

        }

 

  But it does not show up

 

  I see a comment about only IMG_Format being allowed to call initializeTag

 

  How are tags, global options and texture options related, if at all ?

 

Cheers