AMCAF Fonts Bug?

[Mikket]

Hi.

Have you noticed this kind of bug in Amcaf?

Text bank change seems to eat all the memory . First fast, then chip.

I have hud, where I like to use different sizes of fonts, so I change
the bank in main loop.

This problem does not exist, in some winuae configurations.
But in real Amiga 1200 + 4mb (and Winuae, with similar config) it happends.

How can it be avoided?


Here's code to test:

Screen Open 0,320,256,2,Lowres
Curs Off : Colour 1,$FFF
Make Bank Font 7
Change Font "ruby.font",8
Make Bank Font 8

Repeat
Change Bank Font 7
Text 10,10,"Chip:"+Str$(Chip Free)+" "
Change Bank Font 8
Text 10,20,"Fast:"+Str$(Fast Free)+" "
Until Mouse Click

[adrazar]

Hey, it's leaking my memory too!

Like you I am using Change Bank Font frequently in the project I'm currently working on, so this problem is relevant for me as well.
Incredible find @Mikket

[Retro1234]

No idea but what is you Erase 7 etc or Erase All etc does it make a difference?

[adrazar]

Lucky me! I found a way to plug the leak

Originally Posted by Retro1234

No idea but what is you Erase 7 etc or Erase All etc does it make a difference?

No, not this (it increased the chip ram, but fast ram did not come back)

I went over to the SetFont docs, and found in the BUGS section that this function is known to have a memory leak problem, starting from kickstart V36 (which according to wikipedia means starting with the A500+ model). It further suggests using StripFont to solve the problem, and this appears to work.

The following instructions will call StripFont with the required arguments:

Areg(0)=Leek(Scrn Rastport+52) : RESULT=Gfxcall(-822)

I found that it works to insert this code right after each call to Change Bank Font.

[Retro1234]

[Mikket]

Great, that you found this fix adrazar. I had to transfer one font to icons, but now i can change back to amcaf font bank. Thanks.