Clut to the gpu

[klopol]

im having trouble with xp and finding a way to write a clut to the gpu i have a radeon 9550
all leads to opengl have led to dead ends it seems wins protection means going through there drivers either vid/graphics
with little documentation this has become a real pain in the arse
ive tried many forums but to no avail can anyone help?
i understand the ramdac is the holder of the 'permanent color lookup table how can i tell win drivers to write a new one which function and class shall i use ? a exampe or any good advice would be really helpfull
many thanks

 

[PhilFrisbie]

You mean a color look-up table? I have not used those since the DOS/VGA 8-bit color days. What are you trying to accomplish?

 

[klopol]

hi phil would like to write a table (color) to the gpu this stuff was common back n the days but windows protect gpus.
theres not much info about

 

[klopol]

custom color to view apps video

 

[PhilFrisbie]

But CLUTs are only useful for 8-bit mode, and modern versions of Windows do not operate in 8-bit mode, just 16 bit and higher. However, you can access them easily inside a single application by using DirectDraw to create an 8-bit full-screen window.

 

[klopol]

no modern gpus do they use three blocks of memory rgb as a referance. i could go for a screen mask but thats involving similar classes and such.

 

[PhilFrisbie]

Do you want to change the color gamma correction on the desktop?