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Add an additional test-case for circular references in Type3 fonts

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The PDF document in this patch already worked *without* the previous patch, but I wanted to improve our test-coverage for the Type3-parsing.

The attached PDF document was also found in https://github.com/pdf-association/safedocs/tree/main/Miscellaneous%20Targeted%20Test%20PDFs
This commit is contained in:
Jonas Jenwald 2022-01-13 17:53:22 +01:00
parent 53d4ee7990
commit 4c55563574
3 changed files with 129 additions and 0 deletions
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1
test/pdfs/.gitignore vendored
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@ -217,6 +217,7 @@
!issue7339_reduced.pdf
!issue3438.pdf
!issue11403_reduced.pdf
!ContentStreamNoCycleType3insideType3.pdf
!ContentStreamCycleType3insideType3.pdf
!issue2074.pdf
!scan-bad.pdf

122
test/pdfs/ContentStreamNoCycleType3insideType3.pdf Normal file
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@ -0,0 +1,122 @@
%PDF-1.6
%µ¶
1 0 obj
<</Type/Catalog/Outlines 2 0 R/Pages 3 0 R>>
endobj
2 0 obj
<</Type/Outlines/Count 0>>
endobj
3 0 obj
<</Type/Pages/Kids[4 0 R]/Count 1>>
endobj
4 0 obj
<</Type/Page/Parent 3 0 R/MediaBox[0 0 600 840]/Contents 5 0 R/Resources<</Font<</FType3A 6 0 R>>>>>>
endobj
5 0 obj
<</Length 123>>
stream
BT
1 0 0 1 100 500 Tm
2 Tr % Fill then Stroke Text render mode
/FType3A 20 Tf
20 20 Td
50 Tw
(ab) Tj
ET
endstream
endobj
6 0 obj
<</Type/Font/Subtype/Type3/Name/FType3A/Widths[1000 1000]/FontBBox[0 0 750 750]/FontMatrix[.01 0 0 .01 0 0]/Encoding<</Type/Encoding/Differences[97/rect/triangle]>>/Resources<</Font<</FType3B 9 0 R>>>>/CharProcs<</rect 7 0 R/triangle 8 0 R>>/FirstChar 97/LastChar 98>>
endobj
7 0 obj
<</Length 179>>
stream
%%% FType3A stroked red 'rect' = 97 or 'a'
1000 0 d0
20 w
1 0 0 RG
0 0 750 750 re s
BT % This is where a Type3 calls into another Type 3!
/FType3B 50 Tf
(ccc) Tj
ET
endstream
endobj
8 0 obj
<</Length 99>>
stream
%%% FType3A stroked green 'triangle' = 98 'b'
1000 0 d0
20 w
0 1 0 RG
0 0 m 375 750 l 750 0 l s
endstream
endobj
9 0 obj
<</Type/Font/Subtype/Type3/Name/FType3B/FontBBox[0 0 750 750]/FontMatrix[.004 0 0 .004 0 0]/Encoding<</Type/Encoding/Differences[99/fontinside]>>/Widths[900]/Resources<</Font<</F1 11 0 R>>/Pattern<</P1 12 0 R>>>>/CharProcs<</fontinside 10 0 R>>/FirstChar 99/LastChar 99>>
endobj
10 0 obj
<</Length 265>>
stream
900 0 d0
%%% FType3B Helv text for 'c'
2 Tr % Fill then Stroke Text render mode
10 w % stroke width 10
0 0 1 RG % Blue stroke
/Pattern cs /P1 scn % Set /P1 pattern as fill (magenta text)
BT
/F1 60 Tf
30 0 0 30 15 15 Tm -3 Tc 0 Tw
(ab) Tj
ET
endstream
endobj
11 0 obj
<</Type/Font/Subtype/Type1/BaseFont/Helvetica>>
endobj
12 0 obj
<</Type/Pattern/PaintType 1/PatternType 1/TilingType 2/Matrix[0.9 0 0 0.9 0 0]/XStep 55/YStep 32/BBox[0 0 60 60]/Resources<</Font<</CyclicFont 11 0 R>>>>/Length 100>>
stream
BT
/CyclicFont 4 Tf
10 0 0 10 1 1 Tm
0 Tc
0 Tw
1 0 1 rg % Magenta fill
(ba) Tj
ET
endstream
endobj
xref
0 13
0000000000 65536 f
0000000016 00000 n
0000000077 00000 n
0000000120 00000 n
0000000172 00000 n
0000000290 00000 n
0000000464 00000 n
0000000749 00000 n
0000000978 00000 n
0000001127 00000 n
0000001419 00000 n
0000001736 00000 n
0000001802 00000 n
trailer
<</Size 13/Root 1 0 R>>
startxref
2111
%%EOF

6
test/test_manifest.json
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@ -4537,6 +4537,12 @@
"lastPage": 3,
"type": "eq"
},
{ "id": "ContentStreamNoCycleType3insideType3",
"file": "pdfs/ContentStreamNoCycleType3insideType3.pdf",
"md5": "fbf258be0fed9756cbc714f4be6626ff",
"rounds": 1,
"type": "eq"
},
{ "id": "ContentStreamCycleType3insideType3",
"file": "pdfs/ContentStreamCycleType3insideType3.pdf",
"md5": "64840fc5dd8ca06afbc86477d9121b59",