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Dark GDK / The dbGetImageData function

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APEXnow
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Posted: 24th Apr 2006 13:19
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I need to have this clarified, but this function only seems to work if the Lock argument is set to true. Also, because Locking is set to true, is there a particular function that I MUST call in order to unlock it again... i.e. am I supposed to call the dbUnlockImage function, or does it not matter.

Paul.


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APEXnow
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Posted: 24th Apr 2006 13:28
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.. And to add to that, although I now get a valid width/height/depth etc, the two arguments (LPSTR* pData, DWORD* dwDataSize) return odd data. dwDataSize returns 1 and pData points to sh!te data. Any one shed any light?

Cheers!

Paul.


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IanM
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Posted: 24th Apr 2006 15:56
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Does pData point to the raw bytes of the image?

I guess that the best thing to do is to create a 1 pixel 32 bit image of a known colour ( rgb(1,2,3)? ) and see what you get out of it.

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APEXnow
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Posted: 24th Apr 2006 16:02
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Yeah, that's a good point. It was the size thing that threw me though. And if I pre-initialize the pData with something before calling the function, it still points to the original data rather than being re-assigned to the new data via the function call.

It's as if the function only returns the size and depth, but ignores the pointer address to assign.

Paul.


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