[gs-cvs] rev 8136 - trunk/gs/src

[leonardo at ghostscript.com]

Author: leonardo
Date: 2007-07-24 13:02:20 -0700 (Tue, 24 Jul 2007)
New Revision: 8136

Modified:
   trunk/gs/src/gxshade6.c
Log:
Fix (shadings) : Decomposition limit could be too small.

DETAILS :

Bug 689225 "Regression: major differences in 470-01.ps in block 470-03".

This patch improves the tolerance of the shading code to 
a wrong device resolution, which can apparently happen 
when installing a clipper device. Thus is closes a symptom,
but the bottom of the problem is left unfixed.
We do so due to incoming scheduled release.
We opened a separate bug 689365 about a wronmg HWResolution of clipper device.
  
EXPECTED DIFFERENCES :

Should fix the recent regression with 470-01.ps .


Modified: trunk/gs/src/gxshade6.c
===================================================================
--- trunk/gs/src/gxshade6.c	2007-07-24 19:11:42 UTC (rev 8135)
+++ trunk/gs/src/gxshade6.c	2007-07-24 20:02:20 UTC (rev 8136)
@@ -245,6 +245,7 @@
     pfs->n_color_args = 1;
     pfs->decomposition_limit = float2fixed(min(pfs->dev->HWResolution[0], 
 					       pfs->dev->HWResolution[1]) / 72);
+    pfs->decomposition_limit = max(pfs->decomposition_limit, fixed_1);
     pfs->fixed_flat = float2fixed(pfs->pis->flatness);
     /* Restrict the pfs->smoothness with 1/min_linear_grades, because cs_is_linear
        can't provide a better precision due to the color