SF.net SVN: alleg:[12265] allegro/branches/4.9/addons/primitives/ high_primitives.c

[<el...@us...>]

Revision: 12265
          http://alleg.svn.sourceforge.net/alleg/?rev=12265&view=rev
Author:   elias
Date:     2009-07-02 11:41:42 +0000 (Thu, 02 Jul 2009)

Log Message:
-----------
[primitives addon] Fixed a bug where drawing circles with a small radius would crash.

Modified Paths:
--------------
    allegro/branches/4.9/addons/primitives/high_primitives.c

Modified: allegro/branches/4.9/addons/primitives/high_primitives.c
===================================================================
--- allegro/branches/4.9/addons/primitives/high_primitives.c	2009-07-01 16:09:08 UTC (rev 12264)
+++ allegro/branches/4.9/addons/primitives/high_primitives.c	2009-07-02 11:41:42 UTC (rev 12265)
@@ -427,8 +427,10 @@
    
    num_segments = ALLEGRO_PRIM_QUALITY * sqrtf((rx + ry) / 2.0f);
 
-   /* In case rx and ry are both 0. */
-   if (!num_segments) return;
+   /* In case rx and ry are both close to 0. If al_calculate_arc is passed
+    * 0 or 1 it will assert.
+    */
+   if (num_segments < 2) return;
    
    if (num_segments >= ALLEGRO_VERTEX_CACHE_SIZE) {
       num_segments = ALLEGRO_VERTEX_CACHE_SIZE - 1;


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