Bmp2g9b with 8 bits/pixel V9990

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By Manel46

Champion (417)

Аватар пользователя Manel46

22-02-2019, 17:30

Juan Luis wrote:

One thing more about the discussion of graphic formats. Why didn't you use BD16 instead of BP6/BD8 format for christmas photos? I believe that blittering operations are also supported on BD16 and V9990 is fast enough.

There is not enough VRAM. A screen on B3 PD16 weighs 424 kbs.
With PD8, it allows me to scroll two screens, since they weigh half.

By Manel46

Champion (417)

Аватар пользователя Manel46

22-02-2019, 19:41

Sorry. I meant BD16 and BD8.

By Manel46

Champion (417)

Аватар пользователя Manel46

12-05-2019, 11:50

Hi msd,
Do you plan to modify bmp2g9b.exe, so that it works with 256-color bmp files, BD8?
For the capacity of the vram, it is appropriate to use B3 BD8. I'm programming something in this graphic quality.

By msd

Paragon (1372)

Аватар пользователя msd

17-05-2019, 10:31

@Manel46: it didn't find the time so far to work on it. I should put the code in github or something so more people can work on it. It is not a difficult addition.

By Manel46

Champion (417)

Аватар пользователя Manel46

18-05-2019, 15:32

@msd: I guess it's not easy, but it should not be more complicated than for BD16 (16 bits / pixel), which you have solved perfectly.
With the VRAM of V9990, and for B3, the easiest thing is to program in BD8. If the VRAM were 1024 Kbs, it could be done with the same facility in BD16.
Anyway, I am trying to program B3 BD16, passing graphics directly from the rom. The writing on V9990 is very fast.
Thank you for your work with the library, which is great.

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