From: ellson <devnull@localhost>
Date: Thu, 27 Oct 2005 15:45:20 +0000 (+0000)
Subject: fix problem with black dots around white background in bitmap outputs
X-Git-Tag: LAST_LIBGRAPH~32^2~7004
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e67a5c28388d6917a8402ad43d48c23e12e79964;p=graphviz

fix problem with black dots around white background in bitmap outputs
---

diff --git a/lib/common/emit.c b/lib/common/emit.c
index e8fb79dad..9bd39fea3 100644
--- a/lib/common/emit.c
+++ b/lib/common/emit.c
@@ -362,10 +362,13 @@ void emit_background(GVJ_t * job, graph_t *g)
 
     if (! ((str = agget(g, "bgcolor")) && str[0]))
 	str = "white";
-    AF[0].x = AF[1].x = job->pageBox.LL.x;
-    AF[2].x = AF[3].x = job->pageBox.UR.x;
-    AF[1].y = AF[2].y = job->pageBox.UR.y;
-    AF[3].y = AF[0].y = job->pageBox.LL.y;
+    /* need to make background rectangle bigger than the page
+     * otherwise black dots show up from the antialising of the edge
+     * in bitmap outputs */
+    AF[0].x = AF[1].x = job->pageBox.LL.x - 1;
+    AF[2].x = AF[3].x = job->pageBox.UR.x + 1;
+    AF[3].y = AF[0].y = job->pageBox.LL.y - 1;
+    AF[1].y = AF[2].y = job->pageBox.UR.y + 1;
     for (i = 0; i < 4; i++) {
 	PF2P(AF[i],A[i]);
     }