added in-line horizontal processing prototype

[swftools.git] / lib / gfxpoly / xrow.h

diff --git a/lib/gfxpoly/xrow.h b/lib/gfxpoly/xrow.h
index ee0be13..161c8aa 100644 (file)
--- a/lib/gfxpoly/xrow.h
+++ b/lib/gfxpoly/xrow.h
@@ -14,39 +14,9 @@ typedef struct _xrow {
 
 xrow_t* xrow_new();
 
 
 xrow_t* xrow_new();
 

-/* so the idea is this:
-   Before processing any events for a given y, store the list+tree of the current active
-   list (that might be useful anyway for adding xrow points to segments).
-   Then, for every starting segment and for every segment that receives a point, add a (x,segment)
-   tuple to a list which we later sort.
-   These segments will at that point have their *old* fill styles set.
-   Then, order that list, and also merge identical x values using left<->right comparisons on
-   the *old* active list, so that for every x coordinate we have the rightmost (old) segment. (For
-   small active lists, it might be faster to just mark the segments (and store the x in them), and
-   then walk the active list from left to right, collecting marked segments)
-   This list now gives us the information about what the fill areas look like above the scanline and to
-   the right of segments which received a point.
-   Now, apply fill style changes and resort the list, this time using the *new* active
-   list for merging identical x values. That gives us the information on what fill areas look like
-   *below* the scanline and to the right of segments which received a point.
-   Every time an "above" fillstyle differs from a "below" fillstyle, we need to draw a horizontal
-   line (from right to left, using the below fillstyle).
-*/
-
-/* Another approach: since we really only need to know the below *or* above fillstyles in order to
-   determine whether a horizontal line is still needed (if its edgestyle doesn't change the windstate,
-   it's not needed), we can also process horizontal lines after the start events: walk the temporary
-   end segment list and the active list interleaved for each horizontal line, insert horizontal fragments
-   whenever they seem to modify the fillstyle (e.g. apply them with dir=UP).
-   This means that "very horizontal" segments ending in a scanline that encounter hot pixels
-   on their way (and thus don't receive "their" endpoint) need to store a horizontal event. Same for
-   general segments that pass/intersect multiple hotpixels in a scanline.
-*/
-
-

 void xrow_add(xrow_t*xrow, int32_t x);
 void xrow_add(xrow_t*xrow, int32_t x);

-

 void xrow_sort(xrow_t*xrow);
 void xrow_sort(xrow_t*xrow);

+char xrow_contains(xrow_t*xrow, int32_t x);

 void xrow_dump(xrow_t*xrow);
 void xrow_reset(xrow_t*xrow);
 void xrow_destroy(xrow_t*xrow);
 void xrow_dump(xrow_t*xrow);
 void xrow_reset(xrow_t*xrow);
 void xrow_destroy(xrow_t*xrow);