Create a bitmap object from memory

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Hi all,

In my project, i receive an input as a memory block which is merely binary data read from an image file (.jpeg, .png).

How can i create a CBitmap object from that?

quyps,

Posted 3-May-11 21:40pm

quyps

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4 solutions

Solution 1

Create CBitmap with given dimentions, then use function

ASM

DWORD SetBitmapBits(
   DWORD dwCount,
   const void* lpBits
);

Posted 3-May-11 21:53pm

Kozlov_Sergey

Comments

CPallini 4-May-11 4:02am

I suspect CBitmap won't be happy with .jepg, .png data.

[no name] 4-May-11 4:08am

Then before setting data, it should be convered.

[no name] 4-May-11 4:14am

There is not written image data format. I assumed, that it is RGBQUAD array, because i work with such data.

CPallini 4-May-11 4:20am

'merely binary data read from an image file (.jpeg, .png)' is not a RGBQUAD array.

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CPallini · Accepted Answer · 2011-05-03T22:05:00

Solution 2

Why don't you use CImage[^] instead?
It can directly load jpeg and png files.

Posted 3-May-11 22:05pm

CPallini

Comments

Niklas L 4-May-11 7:10am

I guess the easiest possible solution. Fived.

CPallini 4-May-11 7:47am

Thank you.

quyps 11-May-11 1:56am

thank, 5 from me

Niklas L · Accepted Answer · 2011-05-04T01:07:00

Solution 3

The Load()[^] method of CImage, as Pallini suggested, can operate on an IStream instance. You can create such an instance using CreateStreamOnHGlobal()[^] API.

Posted 4-May-11 1:07am

Niklas L

Comments

CPallini 4-May-11 7:49am

My 5. Actually 5+ for correcly spelling my surname. :-)

Niklas L 4-May-11 8:37am

That's very kind of you Panili. ;)

CPallini 4-May-11 8:49am

:-D

Prasanta_Prince 4-May-11 8:30am

Good one. 5 from me.

Niklas L 4-May-11 8:34am

Thanks

quyps 11-May-11 1:57am

thanks, fived :)

quyps · Accepted Answer · 2011-05-04T01:26:00

Solution 4

Thanks alot! You are all right, it's the solution.
I also found one here An MFC picture control to dynamically show pictures in a dialog[^]

Posted 4-May-11 1:26am

quyps