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Bitmap-->scaling-->PNG-->Buffer

alexo
alexo asked
on
Medium Priority
597 Views
Last Modified: 2013-12-03
I need to:

1. Load a bitmap from a resource,
2. Scale it to a given x,y size,
3. Convert it to PNG and,
4. Dump the bits into a memory buffer (in PNG format).

Please suggest the best way to do that.
Preferably, no intermediate file I/O.

Language: C++
I can use: Raw GDI, ATL/WTL, GDI+

Point amount reflects urgency.

Thank you!
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Commented:
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Commented:
Using the

Status Image::Save(IStream *stream,
    const CLSID *clsidEncoder,
    const EncoderParameters *encoderParams
);

method and IStream (creating a memory stream), you can do #4.

Author

Commented:
Sorry, forgot to mention something:
The desired size is in inches, not in pixels.

Thanks.

Author

Commented:
Hmmm, nevermind...
GetDeviceCaps(LOGPIXELSX)

Author

Commented:
Sorry, I was on vacation...
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