vro_cpyfm and colours

[Spaced Cowboy]

 

 

Hi, 

 

I'm a bit confused (even after reading the docs) over how vro_cpyfm (and anything that uses MFDB's actually) works with colours. There doesn't appear to be anywhere in the MFDB to indicate which actual colour a pixel is when the format is the device-dependent one. I can see how the bits identify the "pen", but they don't know that (in MFDB A) pen #1 is 'red' and (in MFDB B) pen #1 is 'green'. 

 

Questions:

 

• Is the palette just whatever is on the screen at the time, so this doesn't really matter ?

 

• What if the screen is 'true-colour' like one of the Falcon modes, or a TT video card ? Is the device-dependent form just 16/24/32-bit packed-data RGB per pixel ?

 

• Do the bit operations (eg: S_XOR_D) work on the colour values, or the pen-ids (ie: what's in the video memory). I'm assuming it's the pen-id's, but since I'm asking questions

 

Ta  

 

[I really wish otter-correct would stop converting vro_... into bro_...]

[Spaced Cowboy]

Nvm, I think I've figured out something that will work for my use-case. I can use one of the reserved flags in the MFDB to indicate there's a colour-table appended to the pixel data.