Bug 689352

Summary:	Regression: Error: /undefinedresource in --showpage-- with Bug689189.pdf at 100 DPI
Product:	Ghostscript	Reporter:	Marcos H. Woehrmann <marcos.woehrmann>
Component:	PDF Interpreter	Assignee:	leonardo <leonardo>
Status:	NOTIFIED WORKSFORME
Severity:	normal
Priority:	P4
Version:	8.56
Hardware:	PC
OS:	Linux
Customer:		Word Size:	---

Description Marcos H. Woehrmann 2007-07-12 11:14:26 UTC

This is an old regression, gs8.54 is the last version that processes the file
correctly (I'm currently searching for the last revision that worked). gshead
(r8119) works at 72 DPI but produces an error at 100 DPI:

GPL Ghostscript SVN PRE-RELEASE 8.60 (2007-05-12)
Copyright (C) 2007 Artifex Software, Inc.  All rights reserved.
This software comes with NO WARRANTY: see the file PUBLIC for details.
Processing pages 1 through 1.
Page 1
Error: /undefinedresource in --showpage--
Operand stack:
   1   true
Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--  
--nostringval--   2   %stopped_push   --nostringval--   --nostringval--  
--nostringval--   false   1   %stopped_push   1889   1   3   %oparray_pop   1888
  1   3   %oparray_pop   1872   1   3   %oparray_pop   --nostringval--  
--nostringval--   2   1   1   --nostringval--   %for_pos_int_continue  
--nostringval--   --nostringval--   1761   0   9   %oparray_pop  
--nostringval--   --nostringval--
Dictionary stack:
   --dict:1147/1684(ro)(G)--   --dict:2/20(G)--   --dict:75/200(L)--  
--dict:75/200(L)--   --dict:106/127(ro)(G)--   --dict:274/300(ro)(G)--  
--dict:21/25(L)--   --dict:4/6(L)--   --dict:20/31(L)--
Current allocation mode is local
Last OS error: 2
GPL Ghostscript SVN PRE-RELEASE 8.60: Unrecoverable error, exit code 1


The command line I used:

  bin/gs- sDEVICE=ppmraw -sOutputFile=test.ppm -r100 ./Bug689189.pdf

Comment 1 Marcos H. Woehrmann 2007-07-12 12:10:15 UTC

The last version that processed the file correctely at 100 DPI was r7165.  

Here are the r7156 changes:

src/gsfunc3.c
14c14
< /* $Id: gsfunc3.c 6698 2006-04-02 00:17:36Z ray $ */
---
> /* $Id: gsfunc3.c 7166 2006-11-06 18:58:56Z leonardo $ */
365,366c365,368
<       if (vv0 < b1 && vv1 > b1)
<           return 0; /* Consider stitches as monotonity beraks. */
---
>       if (vv0 < b1 && vv1 > b1) {
>           *mask = 1;
>           return 0; /* Consider stitches as monotonity breaks. */
>       }


src/gxshade6.c
14c14
< /* $Id: gxshade6.c 6651 2006-03-13 16:18:19Z stefan $ */
---
> /* $Id: gxshade6.c 7166 2006-11-06 18:58:56Z leonardo $ */
2240,2241d2239
<       *not_monotonic_by_v = true;
<     if (code & 2)
2242a2241,2242
>     if (code & 2)
>       *not_monotonic_by_v = true;

Comment 2 leonardo 2007-08-29 21:20:54 UTC

The test case works fine with current head. There were multiple changes in 
algorithms regarding to that file. Closing with worksforme.