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fix embedding of CIDFonts

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Resolves: rhbz#2169890
This commit is contained in:
Richard Lescak 2023-03-17 15:36:15 +01:00
parent d7d50676db
commit e07f2fbf61
2 changed files with 112 additions and 1 deletions
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106
ghostscript-9.27-pdfwrite-Substituted-TTF-CIDFont-CID-hand.patch Normal file
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@ -0,0 +1,106 @@
From 346f12459aa67cdb5ff9e267c2c8cccc17f4a376 Mon Sep 17 00:00:00 2001
From: Chris Liddell <chris.liddell@artifex.com>
Date: Wed, 15 Mar 2023 15:38:29 +0000
Subject: [PATCH] Bug 706478: pdfwrite: Substituted TTF CIDFont CID handling
The PS interpreter callback that handles converting a CID to a TTF GID did
not handle the case of substituted CIDFonts.
It requires looking up the CID on the Decoding (to get a Unicode code point),
and then looking up the code point in the TTF cmap table to get the GID.
The rendering code already handled it.
---
psi/zfcid1.c | 73 +++++++++++++++++++++++++++++++++-------------------
1 file changed, 46 insertions(+), 27 deletions(-)
diff --git a/psi/zfcid1.c b/psi/zfcid1.c
index fd502ff12..55de85d45 100644
--- a/psi/zfcid1.c
+++ b/psi/zfcid1.c
@@ -77,37 +77,56 @@
int gdbytes = pfont->cidata.common.GDBytes;
int gnum = 0;
const byte *data;
- int i, code;
+ int i, code = -1;
ref rcid;
ref *prgnum;
+ ref *p, *fdict = pfont_dict(pfont);
+
+ if (r_has_type(fdict, t_dictionary) && dict_find_string(fdict, "Path", &p)) {
+ ref *Decoding = NULL, *TT_cmap = NULL, *SubstNWP = NULL, src_type, dst_type;
+ uint c;
+
+ code = dict_find_string(fdict, "Decoding", &Decoding);
+ if (code > 0)
+ code = dict_find_string(fdict, "TT_cmap", &TT_cmap);
+ if (code > 0)
+ code = dict_find_string(fdict, "SubstNWP", &SubstNWP);
+ if (code > 0) {
+ code = cid_to_TT_charcode(pfont->memory, Decoding, TT_cmap, SubstNWP, cid, &c, &src_type, &dst_type);
+ if (code >= 0)
+ gnum = c;
+ }
+ }
- switch (r_type(pcidmap)) {
- case t_string:
- if (cid >= r_size(pcidmap) / gdbytes)
- return_error(gs_error_rangecheck);
- data = pcidmap->value.const_bytes + cid * gdbytes;
- break;
- case t_integer:
- return cid + pcidmap->value.intval;
- case t_dictionary:
- make_int(&rcid, cid);
- code = dict_find(pcidmap, &rcid, &prgnum);
- if (code <= 0)
- return (code < 0 ? code : gs_note_error(gs_error_undefined));
- if (!r_has_type(prgnum, t_integer))
- return_error(gs_error_typecheck);
- return prgnum->value.intval;
- default: /* array type */
- code = string_array_access_proc(pfont->memory, pcidmap, 1, cid * gdbytes,
- gdbytes, NULL, NULL, &data);
+ if (code < 0) {
+ switch (r_type(pcidmap)) {
+ case t_string:
+ if (cid >= r_size(pcidmap) / gdbytes)
+ return_error(gs_error_rangecheck);
+ data = pcidmap->value.const_bytes + cid * gdbytes;
+ break;
+ case t_integer:
+ return cid + pcidmap->value.intval;
+ case t_dictionary:
+ make_int(&rcid, cid);
+ code = dict_find(pcidmap, &rcid, &prgnum);
+ if (code <= 0)
+ return (code < 0 ? code : gs_note_error(gs_error_undefined));
+ if (!r_has_type(prgnum, t_integer))
+ return_error(gs_error_typecheck);
+ return prgnum->value.intval;
+ default: /* array type */
+ code = string_array_access_proc(pfont->memory, pcidmap, 1, cid * gdbytes,
+ gdbytes, NULL, NULL, &data);
- if (code < 0)
- return code;
- if ( code > 0 )
- return_error(gs_error_invalidfont);
+ if (code < 0)
+ return code;
+ if ( code > 0 )
+ return_error(gs_error_invalidfont);
+ }
+ for (i = 0; i < gdbytes; ++i)
+ gnum = (gnum << 8) + data[i];
}
- for (i = 0; i < gdbytes; ++i)
- gnum = (gnum << 8) + data[i];
if (gnum >= pfont->data.trueNumGlyphs)
return_error(gs_error_invalidfont);
return gnum;
--
2.39.2

7
ghostscript.spec
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@ -37,7 +37,7 @@
Name: ghostscript
Summary: Interpreter for PostScript language & PDF
Version: 9.27
Release: 7%{?dist}
Release: 8%{?dist}
License: AGPLv3+
@ -108,6 +108,7 @@ Patch015: ghostscript-9.27-fix-use-of-HWMargins.patch
Patch016: ghostscript-9.27-Deal-with-different-VM-modes-during-CIDFont-loading.patch
Patch017: ghostscript-9.27-ESC-Page-driver-does-not-set-page-size-correctly.patch
Patch018: ghostscript-9.27-fix-bbox.patch
Patch019: ghostscript-9.27-pdfwrite-Substituted-TTF-CIDFont-CID-hand.patch
# Downstream patches -- these should be always included when doing rebase:
@ -448,6 +449,10 @@ done
# =============================================================================
%changelog
* Fri Mar 17 2023 Richard Lescak <rlescak@redhat.com> - 9.27-8
- fix embedding of CIDFonts
- Resolves: rhbz#2169890
* Wed Mar 15 2023 Richard Lescak <rlescak@redhat.com> - 9.27-7
- fix bbox device calculating bounding box incorrectly
- Resolves: rhbz#2176327