[cairo] questions concerning cairo/glitz

[Bill Spitzak]

Keith Packard wrote:
> On Sun, 2005-07-31 at 00:05 -0500, Ryan O'Hara wrote:
> 
> 
>>  cairo_set_source_rgba( cr, 1, 0, 0, 1);
>>  cairo_set_line_width(cr, 5);
>>  cairo_rectangle(cr, 150, 200, 50, 50);
>>  cairo_save(cr);
>>  cairo_fill(cr);
>>  cairo_restore(cr);
>>  cairo_stroke(cr);
>>
>>If i comment out the call to cairo_fill, the everything else seems to
>>work fine. Any help would be greatly appreciated.
> 
> 
> The current path is no longer part of the gstate, so save/restore
> doesn't preserve it.  Check out cairo_fill_preserve

This may be a problem with code translated from other libraries that 
expect the behavior. However I certainly think the current Cairo 
behavior with paths is much more useful in many cases.

One idea I did in a similar interface was to have fill() not destroy the 
path, but instead it sets a flag so that the next lineto() or moveto() 
destroys the path. This also eliminates the need for the _preserve() 
methods.

Then again it may be inefficient to do it this way.