Snapshot problem with BMP and 12 Bytes Extra Needed

Keywords: 	 Snapshot problem BMP 12 bytes shift 12 bytes

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Question:

I use the program below to generate a Snapshot BMP, which will be uploaded to the web, see here:

http://www.biewer.com/wetter.png

However the bitmap created is not correct, at the right side I miss some pixels which are added at the left. Looks like a memory allocation problem to me. Anyone has any ideas?

Snapshot(0)
size=BinaryClipGet(0,8)
bb=BinaryAlloc(size)
BinaryClipGet(bb,8)

bb2=BinaryAlloc(size+14)
BinaryPokeStr(bb2,0,"BM")
BinaryPoke4(bb2,2,size+14)
tableloc=BinaryPeek4(bb,0)+14
BinaryPoke4(bb2,10,tableloc)
BinaryCopy(bb2,14,bb,0,size)
BinaryWrite(bb2,"\\Peacock\Shared\UserProg\weblinks\wetter.bmp")
BinaryFree(bb)
BinaryFree(bb2) 

Answer:

Maybe change:

BinaryPoke4(bb2,10,tableloc)

to:

BinaryPoke4(bb2,10,tableloc+12)

and let me know if that helps...

Question (cont'd):

Yes, this helped!!! Is there some background regarding the little modification I should know?

Answer:

Well in the initial script I had tried to read the BMP file documentation and make a bmp file from a SnapShot image.

It started working and I stopped.

However it seems there was a small error.

The fix seems to correct the error.

A confusing problem is that there are several different BMP file formats. Not all programs recognise all formats.

When you save a file is MSPAINT, it save it in a different, more compressed format than the sample code saves it in, making debugging more difficult. This also depends on your version of MSPAINT.

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Article ID:   W15109