From p.dalgaard at biostat.ku.dk  Sat Jul 26 09:54:45 2008
From: p.dalgaard at biostat.ku.dk (Peter Dalgaard)
Date: Sat, 26 Jul 2008 09:54:45 +0200
Subject: [Rd] the C function drawing a rectangle: heatmap() -> image()
 ->	do_image() -> GRect() -> GERect() -> rect() -> do_rect() ->	GRect() ??
In-Reply-To: <200807261055078432709@163.com>
References: <200807261055078432709@163.com>
Message-ID: <488AD845.7040200@biostat.ku.dk>

Zhaoyuan Fang wrote:
> Hello anyone used to do similar things: search for the final C function that corresponding to the drawing of a rectangle? 
>
> As listed in the subject, I started from heatmap() in R and after several steps reached the GRect() in C. However, then it refers to rect() which further seems to refer to do_rect(), and then, surpringly, do_rect refers to GRect()!!! A dependency circle! How can it work if no functions soly taking the job for drawing a rectangle?  
>
> I know there must be somewhere wrong in my above function "chain", and can you help me to find it out? Many thanks!
>  				
> https://stat.ethz.ch/mailman/listinfo/r-devel
>   
I see GRect() calling GERect() calling dd->dev->rect(), i.e. a function 
in the current device structure. This will typically have been set to 
something like X11_Rect() or Cairo_Rect() or ....

-- 
   O__  ---- Peter Dalgaard             ?ster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark      Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)              FAX: (+45) 35327907



[Rd] the C function drawing a rectangle: heatmap() -> image() -> do_image() -> GRect() -> GERect() -> rect() -> do_rect() -> GRect() ??
Peter Dalgaard