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devel / comp.os.ms-windows.programmer.win32 / GdipCreateBitmapFromScan0 - how to make it own the raw pixel data ?

GdipCreateBitmapFromScan0 - how to make it own the raw pixel data ?

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From: address@is.invalid (R.Wieser)
Newsgroups: comp.os.ms-windows.programmer.win32
Subject: GdipCreateBitmapFromScan0 - how to make it own the raw pixel data ?
Date: Mon, 27 Nov 2023 12:44:21 +0100
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by: R.Wieser - Mon, 27 Nov 2023 11:44 UTC

Hello all,

I was using GdipCreateBitmapFromScan0 feeding it raw RGBA data, and deleted
the fed data afterward. Than I saved the resulting bitmap to a file.

To my surprise the file was fully empty (and no error!) ...

It looks like that, when I use the above call, I need to keep the raw RGBA
data available - which is quite different as, for example,
GdipCreateBitmapFromFile works.

Is there a way to tell GdipCreateBitmapFromScan0 to become owner of the raw
RGBA data, so that it, when GdiPDisposeImage is called, /all/ the image data
is discarded (and I do not need to discard the raw RGBA data myself) ?

Remark:

I've found some github sourcecode(?) for the GdipCreateBitmapFromScan0
function, which clarifies the above behaviour. I /could/ hack something
together to store (a ptr to) a GdipAlloc-ed block of memory (loaded with the
raw pixel data) into the GpBitmap structure, but I would rather not...

Regards,
Rudy Wieser

Subject	Author
GdipCreateBitmapFromScan0 - how to make it own the raw pixel data ?	R.Wieser