[Lazarus] TImage and PNG (on linux)

[Leonardo M. Ramé]

On 2011-04-12 19:22:36 +0200, Krzysztof wrote:
>    This is known issue. GTK have no alpha yet but I created set of components
>    which partially solve this problem by using BGRABitmap class, details:
>    http://www.lazarus.freepascal.org/index.php/topic,12411.0.html . Although
>    there is no TImage yet but I can try create it.
>    For TrayIcon on GTK you must rebuild lazarus with -dUseStatusIcon switch.
>    If tray still have no alpha then you must add this 3 lines posted by
>    TrUsTeR:
>    http://www.lazarus.freepascal.org/index.php/topic,6583.0.html
>    After this tray icon works perfect in my case.
>    2011/4/10 Leonardo M. Rame <l.rame at griensu.com>
> 
>      Hi, I was testing a sample project and found that on Windows, handling
>      of PNGs with transparent backgrounds is working ok, but on Linux it
>      doesn't work as expected. The image is a black line on the top of the
>      image, with a Gaussian Blur applied on Photoshop, then saved to PNG with
>      transparent background.
> 
>      I attached an image showing what I get on Windows vs Linux, also the
>      original image.
> 
>      Thanks in advance,
>      --
>      Leonardo M. Rame
>      http://leonardorame.blogspot.com
>      --
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Well, I don't really need TImage, but TPicture. What I need is to be
able to use TCanvas methods to copy this picture into another TCanvas.

Does your component allows this?



-- 
Leonardo M. Ramé
http://leonardorame.blogspot.com