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Thread View: comp.sys.next.programmer
1 messages
1 total messages Started by John Alegre Mon, 11 Jan 1993 20:38
Video on a NeXT?
#2308
Author: John Alegre
Date: Mon, 11 Jan 1993 20:38
45 lines
1955 bytes
I am looking for genersl opionion on the best way to
display Video Frames in a NeXT Window.

At this stage of the game we have the options of
receiving the frames via DMA from the SCSI port as
either:

1. 16 bit/pixel frames.  That would be 5 bits Red,
   5 Blue, and 5 Green with a garbage bit, set to
   0
   
2. 32 bit/pixel frame.  That would be 8 bits Red,
   8 Green, 8 Blue, with 8 garbage bits set to 0.

The frame would be just an array of pixel data in
one of the above formats, starting at the upper
left corner of a quarter or half CIF image and
continuing till the last pixel of that frame.
The next DMA would bee next frame, etc.

What is the general opinion of the best way to
get such frames on the screen in the context of
NeXT objects.

We are looking at both NXImage and NXLiveVideoView
objects as well as the possibility of writing
directly to screen buffer.  The scheme that has
worked well on the Macintosh is using copyBits on
off screen bit maps.

All comments welcome.

Thank you
---
John N. Alegre
Andante Systems
VideoLabs Inc.

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