Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

VIP core - Frame Reader (On Screen Display)

Hi all - how would I display a 'picture' , for example a bitmap, on the on-screen display.

I'm working through a design example on the NEEK - the author has gone to some trouble to write some routines for a reasonably comprehensive OSD , including text/fonts on the OSD.

Lurking in the code is a folder refering to The Gimp and bitmaps with what looks like some conversion routines. In the design example the OSD is simply a block of allocated memory storing pixel data - is it just a case of copying the (converted?) bitmap to this memory?

I'm a little new to the VIP - any help would be appreciated, cheers, JB.

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    The basic idea is like this

    1. put the bitmap data on off-chip-mem(if it very small, then you could use onchipmem)

    2. read the picture data by using frame reader

    3. send the data to mixer as a layer (cause you might want to change picture)

    4. send the data to clocked video output