Comment on attachment 113556 [details]
The PDF which is rendered wrong

>%PDF-1.6
%âãÏÓ
>11 0 obj
<</Linearized 1/L 7308/O 13/E 2363/N 1/T 6990/H [ 472 151]>>
endobj
                     
>19 0 obj
<</DecodeParms<</Columns 4/Predictor 12>>/Filter/FlateDecode/ID[<443A32303135303230343039353835312B303127303027><A6E6F3041BD44449BADE7E0FCD63BF00>]/Index[11 12]/Info 10 0 R/Length 56/Prev 6991/Root 12 0 R/Size 23/Type/XRef/W[1 2 1]>>stream
>hÞbbd``b`¾ ÖS ÁøD|@+ø!ÅÀÄÈ0¤é?ãÉÿÇIó
>endstream
endobj
startxref
>0
>%%EOF
>        
>22 0 obj
<</Filter/FlateDecode/I 92/Length 67/S 38/V 70>>stream
>hÞb```c``Re¶zTÀÄ,
HblPÌÀð³AP¦ÓB3]«fa`â2:審
>endstream
endobj
12 0 obj
<</AcroForm 20 0 R/Metadata 2 0 R/Pages 9 0 R/Type/Catalog>>
endobj
13 0 obj
<</ArtBox[0.000229 0.000237 259.653748 286.514465]/Contents 14 0 R/CropBox[0 0 259.653992 368.503937]/MediaBox[0 0 259.653992 368.503937]/OneVisionPageColorsInfo<</CreationDate(D:20150204095851+01'00')/PageProcessColors[/Magenta/Yellow/Black]>>/OneVisionVLedgerlines[5.669291 91.41732 255.472443]/Parent 9 0 R/Resources<</ColorSpace<</CS0 21 0 R>>/ProcSet[/PDF/Text/ImageB]/Shading<</Sh0 18 0 R>>>>/Rotate 0/TrimBox[0.000229 0.000237 259.653748 286.514465]/Type/Page>>
endobj
14 0 obj
<</Filter/FlateDecode/Length 155>>stream
>HdÁ
>Â0Dïûóé¦MÚÍUéQ°´bo¢­Vðó=H@æòv;1Rn*­|ÿqQ²lbÃ	:c¢X1ÄÄÔÝvÿ~¶o~ÞÅOqciS¨ÜVì,¾Ïi1ñÔNtî,R¥­i×#kc	¨{4u§ç¥»½×ú:¬8©ù0ïí4
>endstream
endobj
15 0 obj
<</Filter/FlateDecode/First 12/Length 146/N 2/Type/ObjStm>>stream
>hÞ22P0P02T040U°±ÑwqÔÐ÷HÍ)
>¤tM}  k^r~Jf^:àâæP°*²³ÓwËÏ+ÊuÄô£]Ì!Ò ©9)ÅѱvvÑú.©eÉ©~Ñú¾é©y%ú©99ùåúN9ÉÙ±PigßHoC°Y±ñ0
>endstream
endobj
16 0 obj
<</Domain[0 1 0 1 0 1]/Filter/FlateDecode/FunctionType 4/Length 99/Range[0 1 0 1 0 1 0 1]>>stream
>HªN)-P0PÈ-ÍQH­HÎP Ì5DpòÌtòsrHÓ&2ÉTAקI¸µb1ÉÂ,.MR0QÈÌKI­@)EâZ(@müº@~CÆßÅTñg-@m«ÙW
>endstream
endobj
17 0 obj
<</BitsPerSample 8/Domain[0 1]/Encode[0 255]/Filter/FlateDecode/FunctionType 0/Length 105/Range[0 1 0 1 0 1]/Size[256]>>stream
>HTÂÇ
À	ìØE±÷b¯ûâ?&w¹ìóÎ~_~úá»o¾úâ³O>úàÔ{'½óÖ¯½òÒÏ=óÔ=òÐ÷¹ç®CwÜvËM7\wÍU®¸ì.8ïÜÿWзl
>endstream
endobj
18 0 obj
<</BitsPerComponent 16/BitsPerCoordinate 32/BitsPerFlag 8/ColorSpace 21 0 R/Decode[-1 1 -1 1 0 1]/Filter/FlateDecode/Function 17 0 R/Length 31/ShadingType 4>>stream
>xchÿÿþC@LpÀdB¨åí
>endstream
endobj
1 0 obj
<</Filter/FlateDecode/First 15/Length 633/N 3/Type/ObjStm>>stream
>hÞ|ÍnÛ0Ç_ÅO06i¦@ [=,ÀÐkshh¶Ê«lÙÓק]ìüÿHb¼*®ÛâvY¬Åõ²¸¿Ïè«ë#|#{¤hBÙ+§Mß°èªøØQÂSªâi xæÇ"?aD7yWê¦+AØW|¨þË>º&O½¢ðsy§#BïzPÆ«ÔÕþv".Ѧ¾A:)k\Ooà¹$Dc5×wð\¤À.KÅÝ
>G*Ë5TÉZ ±iÈ_º²@Ö!Ôi-P_µuj*n§IÆæ´êøayÓ´:Ó§ùغ°×Ò§¯x8Ñ!d¶>ü3gNñèQSþ
jÃ}Á÷`Ç÷%<ɨ^´á!gxÌR¬HAÈßü*«+(wüãTòãØXñ¸7ê+ôl­aJ¬Üpæ×5ñMÏs½]u
¯í]OüÐT§Æ>ièPå¨ñD0ØdVñ·fØrl²P¥HÐ¥b±¾ìÓãÕçl´±ï}Òs?lnh½ï	=ãÏm-ÎÎP,î°Í[©¶-Û6¯l§£oómKør)_
>\
>\Îàr¢v¢Ùf7Óì&M[xr{ïE¾É÷gÁDuÉF3Øìår=ÌÐÃļHð¹uW|Ç;ZÙ(,Jg,JYR`òßó2¦LeDcDcf3iÇÐK9'r'r7»³`¢´9Ñ!CH&ÓLq`ÌC8]Ü¿ätùôm6ÿìó
>endstream
endobj
2 0 obj
<</Length 3360/Subtype/XML/Type/Metadata>>stream
><?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?>
><x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 5.4-c005 78.147326, 2012/08/23-13:03:03        ">
>   <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
>      <rdf:Description rdf:about=""
>            xmlns:xmp="http://ns.adobe.com/xap/1.0/"
>            xmlns:pdf="http://ns.adobe.com/pdf/1.3/"
>            xmlns:dc="http://purl.org/dc/elements/1.1/"
>            xmlns:xmpMM="http://ns.adobe.com/xap/1.0/mm/">
>         <xmp:ModifyDate>2015-02-16T15:39:50+01:00</xmp:ModifyDate>
>         <xmp:CreateDate>2015-01-19T16:47:43+01:00</xmp:CreateDate>
>         <xmp:CreatorTool>CorelDRAW Version 12.0</xmp:CreatorTool>
>         <xmp:MetadataDate>2015-02-16T15:39:50+01:00</xmp:MetadataDate>
>         <pdf:Producer>OneVision PDFengine (Windows 64bit Build 27.026.R)</pdf:Producer>
>         <dc:format>application/pdf</dc:format>
>         <dc:title>
>            <rdf:Alt>
>               <rdf:li xml:lang="x-default">Geprüft Gebrauchtwagen</rdf:li>
>            </rdf:Alt>
>         </dc:title>
>         <xmpMM:DocumentID>uuid:03d74d01-1830-40ea-a5b3-fc23dade2dc9</xmpMM:DocumentID>
>         <xmpMM:InstanceID>uuid:8cecb6cd-483d-4760-8511-65fb79e6a31b</xmpMM:InstanceID>
>      </rdf:Description>
>   </rdf:RDF>
></x:xmpmeta>
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                                                                                                    
>                           
><?xpacket end="w"?>
>endstream
endobj
3 0 obj
<</Filter/FlateDecode/First 4/Length 49/N 1/Type/ObjStm>>stream
>hÞ²T0P°±ÑwÎ/Í+Q0Ô÷ÎL)64
>ÅêT¤ê$¦§ÛÙà5¯
>endstream
endobj
4 0 obj
<</Filter/FlateDecode/First 5/Length 230/N 1/Type/ObjStm>>stream
>hÞ¤AkÂ0ÿJn&í÷Å&®C× ÛaLtÔ Õ~vl1Õ?¿Ãéa;íúò<ïÀM&i¨Ö;SEâæ^*@ÌQgãl4Äå/| Ö¬fVR8]52>ûº Q£å
>n/Jû-üÖA®îþ_Ãkß)ø~{ñ®iéÉð]^Ã9êYw~¬zÄ2øº;Pà·-Í\c±-ßXWûËélo#{èl[39N@êdµ"ý§þjcK|AïáóÙö¡êoñR5äÄtú%ÀÍ|*
>endstream
endobj
5 0 obj
<</DecodeParms<</Columns 4/Predictor 12>>/Filter/FlateDecode/ID[<443A32303135303230343039353835312B303127303027><A6E6F3041BD44449BADE7E0FCD63BF00>]/Info 10 0 R/Length 49/Root 12 0 R/Size 11/Type/XRef/W[1 2 1]>>stream
>hÞbb&FNk&æë@7H0ög ÄÓM@#`ú$û
>endstream
endobj
startxref
>116
>%%EOF

Created attachment 113557 [details]
The red square is shown blue

(Sorry for comment 1)

Here the result of 
./utils/pdftoppm -png -cropbox -overprint pur_red.pdf pur_red

Created attachment 113558 [details] [review]
This patch solves it

The reason is that the color components of a DeviceN colorspace can't be just copied to the splash bitmap, even not in CMYK or DeviceN splash bitmap. The color must always be converted. This patch solves it.

Created attachment 113559 [details]
red square is shown red again

Here the result of 
./utils/pdftoppm -png -cropbox -overprint pur_red.pdf pur_red_patch
after apllying the patch

Pushed