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Quinch

Writing a bitmap file from array data?

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Quinch

Short version, can it be done? In theory it should be simple enough, open a file, write a header, then dump each pixel data in succession... headers are probably going to give me trouble more than anything, but is the overall idea solid? I'm trying to write a script for making large screenshots, and while this approach might be a little primitive... screw it, whatever works, right?

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Unsigned

I doubt AutoIt's performance would make this practical for anything other than very small images, but yes, the concept is solid.


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Quinch

I doubt AutoIt's performance would make this practical for anything other than very small images, but yes, the concept is solid.

Hm, what would be the bottleneck, the write speed?

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Unsigned

Hm, what would be the bottleneck, the write speed?

The everything-speed :graduated: AutoIt is interpreted, and it's array performance is fairly good as such, but is not nearly ideal for image processing. And a decent screenshot would require a rather large array. Not saying it can be done, but it will suffer from execution performance. AutoIt is not an image processing language.

Edited by Unsigned

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Quinch

Only if the data has to be dumped in a single go - I could probably define a mid-sized array, write the data once it's filled, then repeat until done. It would be a bit of a balancing act between array size versus performance, though, but that should be tweakable easily enough.

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Unsigned

It's not so much the array size either, but loop performance. But hey, you don't have to take my word for it, go ahead and give it a shot :graduated: Nothing like learning from experience. All the same, if I absolutely had to do image processing in AutoIt, I'd rip out a DLL or plugin to do the heavy lifting.


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AndyG

Hi,

there are several examples for writing Bitmaps without any GDI-stuff here in the forum...

I wrote a very "native" one

Try examples too.

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