Windows resource file (.res) in Lazarus
lazarus / 8-Other

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Phil H. · 2005-08-09 18:16

How do I work with a .res file containing several bitmaps in Lazarus?

LazRes converts forms to Lazarus resources, but what's the trick for
.res files so I can load their bitmaps with
TBitMap.LoadFromLazarusResource?

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Marc · 2005-08-10 09:20

You cannot platform independent.
On win32 you can link it to your executable and use the winapi
functions for it.

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Phil H. · 2005-08-10 14:38

Quote from: "Marc"You cannot platform independent.
On win32 you can link it to your executable and use the winapi
functions for it.

Marc, thanks for the info, but there are a couple of problems with
that approach.

FPC will only link in one .res file with the {$R} directive. If I have
two in a project, then the Win API LoadBitmap returns 0, indicating it
didn't find the bitmap resource. If I comment out the {$R} in my .lpr
that links in the program's icon and version info (generated by
Delphi), then LoadBitmap works (returns non-0 handle of the bitmap).
However, assigning this to an LCL TBitmap.Handle doesn't work like it
does in Delphi. Is there some trick to getting a loaded bitmap handle
to work with LCL's TBitmap?

Also, is there a cross-platform way of working with bitmaps? For
example, can I convert the .res bitmaps to some format that can work
with LCL? I believe this .res file was created with Delphi's Image
Editor.

Thanks.

-Phil

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Marc · 2005-08-11 08:55

You can use it as lazresource (in the tools dir)

Usage: lazres resourcefilename filename1 [filename2 ... filenameN]

Example:
  lazres mybitmaps bitmap1.bmp bitmap2.bmp
would create a mybitmaps.lrs whith 2 resources of type bmp with the
name bitmap1 and bitmap2

See the unit LResources for more info.

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Phil H. · 2005-08-11 17:29

Quote from: "Marc"You can use it as lazresource (in the tools dir)

Usage: lazres resourcefilename filename1 [filename2 ... filenameN]

Example:
  lazres mybitmaps bitmap1.bmp bitmap2.bmp
would create a mybitmaps.lrs whith 2 resources of type bmp with the
name bitmap1 and bitmap2

See the unit LResources for more info.

Marc, many thanks. I'll give that a try.

-Phil