[lazarus] Helping to linux part

[Andrew Johnson]

On Thu, 29 Aug 2002 05:25:59 +0200
"Mattias Gaertner" <nc-gaertnma at netcologne.de> wrote:

>Perhaps Andrew can tell, what he is working on.

Well, I am trying to fill in the blanks in all things Graphics. This means 
also fixing/finishing controls within the LCL which couldn't be finished on 
acount of incomplete/missing Graphics routines. Currently my big project is 
filling in as much of the blanks as possible in TBitmap/TPixmap & 
corresponding TBitmapCanvas, much of this is both LCL, and Interface, which 
means to begin with my changes will only be available under GTK. After I get 
more of the basics working - resizing, draw, FreeImage, etc. I will start 
working on getting TPicture to work, and from there TImage. The biggest 
problem I am facing is Data. Because of the way GDK/GDKPixbuf handle 
Bitmap/Pixmap data, I have only two way's of getting data, pixel by pixel 
manually, or Pixel by pixel in one lump (gdk_pixbuf_get_pixels). Which means 
I have to find someway of converting all data into proper corresponding Data 
for Streams and Files. For Pixmaps I can almost do this with Pixmap 
libraries, but since we would prefer to have as few additional library 
dependencies as possible, we need to write our own routines, for all 
formats. Plus we need to be able to implement loading of Bitmap data. which 
currently does nothing.. not even create a blank Bitmap handle. Until saving 
to stream is done, Lazarus has no way of saving to lfm, and until loading 
from stream is complete, loading from dfm's will be sketchy at best.  
Once/if I can get streaming working, the biggest dillemna will be working 
out the differences within interfaces, so that the LCL has as few interface 
specific workarounds as possible.

Andrew

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