"Scroll" HDMI output

[domasa]

Many HDMI monitors have 1:1 view (pixel per pixel) but most of them can display only center of view. Scroll display is not possible.

Is it possible add feature "Shift HDMI output" to "Arrow/SET shortcuts" for display optional part of view in center of HDMI output?


80D shifting the display buffer (from Twitter by a1ex ?):
https://twitter.com/i/status/1094263460672794624

[a1ex]

Somehow this one slipped through the cracks, but is really easy to implement.

http://www.magiclantern.fm/forum/index.php?topic=21108.msg194848#msg194848

[domasa]

However, the feature you are looking for is really easy to do - just change the display buffer address (start from the full-screen magic zoom code or HDR video flicker workarounds, and tweak from there). Scrolling left to right should be straightforward; scrolling up and down will display additional things (likely noise), but if you can zoom on the external monitor, that should be harmless.

Please, can someone help with implementing?

[domasa]

Please, can someone help with implementing?

Hope dies last :-)

[reddeercity]

Interesting never notice this before , I can see this to  be very useful specially in 3x crop mode or even 4k , UHD resolution .
I have a old Zacuto hdmi evf that has 1:1 , auto scaling etc. ...
I'll have a look and see what I can do .
loaded the TFT_SIO Communication module from dfort downloads (thanks I don't have to compile myself to save time)
I see so promise already    ran it on top of startup log memspy  build from a1ex
A series of brute force regs. started to move the liveview screen right & left about 150 to pixel vertically,
Almost seems it's moving to the OB range , I try and get a screen shot later .

[reddeercity]

Some 5D2  HDMI Log information here  , hopefully it will be helpful in development of this feature request 

[reddeercity]

Found out what the HDMI chip is on 5D2 "TDA19989AET/" data sheet below
https://media.digikey.com/pdf/Data%20Sheets/NXP%20PDFs/TDA19989.pdf

[domasa]

Without any progress?

[reddeercity]

Sorry haven't had the time to look at this again , this is very low on my priority list at the moment
I'm focusing more on Lossless Compressed raw , 3.5k/UHD/Raw& Mjpeg plus 10-12bit raw video on digic iv cams in particular  5D2

[a1ex]

FYI: https://www.magiclantern.fm/forum/index.php?topic=16040.msg202394#msg202394

Anyone who understands the above stuff will be able to implement this feature request in no time.

[domasa]

Anyone who understands the above stuff will be able to implement this feature request in no time.

Is there developer with no time?