TBitmap.ScanLine
lazarus / 7-LCL

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Anonymous · 2004-06-03 19:03

Why missing?  :shock:

The suggested alternative is a completely different creature. Would be
preferable to wrap a DIB mechanism.

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Marc · 2004-06-09 16:23

What alternative ?

And what do you mean by "Would be preferable to wrap a DIB mechanism"
Can you be more specific what you had in mind ?

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JopieK · 2005-05-10 12:06

well,  I can imagine that he wants to use the TBitmap.ScanLine
property. It is almost impossible imho to manipulate images without
such a features.

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Marc · 2005-05-11 10:30

This is discudssed before, but in short:
TBitmap.Scanline is not cross platform (a win32 specific feature) so
to be able to support it, we have to mimick the behaviour, which will
lead to bad performance (and performance was why you wanted to use it
in the first place)
As alternative you can use the far more powerfull TLazIntfImage. There
you have raw access to every pixel at RGBA format.