Bisma Jayadi wrote:
I'm the person who reported the supposed bug. But after the
explanation of a peer, i agreed that was a bug/misbehavior of Delphi.
So i'm favorable as not considerating as a bug but as a "difference"
that should be considered when porting a Delphi app. I think that we
should follow Delphi as close as possible (I'm porting a rather
complex Delphi software) but when we found that _clearly_ is a bug or
misbehavior, or cannot be done in a cross platform way, we should be
free to do our way (what we think is the best way).
Agree. It's a bug of Delphi, not Lazarus. So, instead of "fixing" it to
be compatible with Delphi, I prefer to report it as bug to
Borland/CodeGear QC. Obviously Rectangle(0,0,1,1) must draw a 2x2
rectangle as it uses 2 pixels, and Rectangle(0,0,0,0) must draw a 1x1
rectangle as it uses 1 pixel.
However, this incompatibility had forced me to do lots of IFDEFs when
porting some Delphi application to Lazarus a while ago. :(
Idea: instead of IFDEFs everywhere you can also try to define an IFDEFed
constant RECT_OFFSET [or a shorter name], being either 0 or 1, and add it
everywhere where needed.
BTW Imho I think the win32/Delphi approach reduces the overall number of +1's
and -1's (in particular in the implementation of API routines), but I agree
that the Laz interpretation is way less confusing for developers using Laz.
Regards,
Bram
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