string isByteString
	ifTrue: [ self next: count putAllByteString: string startingAt: offset toStream: stream ]
	ifFalse: [ super next: count putAll: string startingAt: offset toStream: stream ]

Hi, all. I am working on creating a PDF with Artefact (https://github.com/pharo-contributions/Artefact) and am having an issue running the first example. the Example looks like: PDFDocument new add: (PDFPage new add: (PDFTextElement new text: 'Hello'; from: 10mm@10mm)); exportTo: 'test.pdf' asFileReference writeStream. When running this, I get the error: Instance of ByteArray did not understand #isByteString indeed, ByteArray does not have a method called isByteString. I have tried creating a method that returns either true or false (I tried them both), but I have not successfully built the PDF. The method calling isByteString looks like: ZnUTF8Encoder next: count putAll: string startingAt: offset toStream: stream "Write count characters from string starting at offset to stream." "Overwritten for performance reasons - create a fast path for byte strings" string isByteString ifTrue: [ self next: count putAllByteString: string startingAt: offset toStream: stream ] ifFalse: [ super next: count putAll: string startingAt: offset toStream: stream ] I TOTALLY get this. This is a whole bunch of very specific questions. But my ultimate goal is to take a deep dive into stream processing to figure this out. Thanks! ---- peace, sergio photographer, journalist, visionary Public Key: https://pgp.key-server.io/pks/lookup?op=get&search=0x69B08F58923AB3A2 #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV @sergio_101@mastodon.social https://sergio101.com http://www.codeandmusic.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101

So the method is expecting some kind of string, but it received a ByteArray, which is NOT any kind of string. What's in the ByteArray? Where did it come from? Why isn't it a string? On Thu, 18 Jan 2024 at 04:34, sergio ruiz <sergio.rrd@gmail.com> wrote: > > Hi, all. > > I am working on creating a PDF with Artefact (https://github.com/pharo-contributions/Artefact) and am having an issue running the first example. > > the Example looks like: > > PDFDocument new add: (PDFPage new add: (PDFTextElement new text: 'Hello'; from: 10mm@10mm)); exportTo: 'test.pdf' asFileReference writeStream. > > > When running this, I get the error: > > Instance of ByteArray did not understand #isByteString > > indeed, ByteArray does not have a method called isByteString. > > I have tried creating a method that returns either true or false (I tried them both), but I have not successfully built the PDF. > > The method calling isByteString looks like: > > > ZnUTF8Encoder > > next: count putAll: string startingAt: offset toStream: stream > "Write count characters from string starting at offset to stream." > "Overwritten for performance reasons - create a fast path for byte strings" > > string isByteString > ifTrue: [ self next: count putAllByteString: string startingAt: offset toStream: stream ] > ifFalse: [ super next: count putAll: string startingAt: offset toStream: stream ] > > I TOTALLY get this. This is a whole bunch of very specific questions. But my ultimate goal is to take a deep dive into stream processing to figure this out. > > Thanks! > > ---- > peace, > sergio > photographer, journalist, visionary > > Public Key: https://pgp.key-server.io/pks/lookup?op=get&search=0x69B08F58923AB3A2 > #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV > @sergio_101@mastodon.social > https://sergio101.com > http://www.codeandmusic.com > http://www.twitter.com/sergio_101 > http://www.facebook.com/sergio101 >

Try this: (PDFDocument new compression: false)add: (PDFPage new add: (PDFTextElement new text: 'Hello'; from: 10mm@10mm)); exportTo: 'test.pdf' asFileReference writeStream. Compression causes your string to be gzip’d which is a ByteArray and not a String of any kind. Unfortunately, the write stream is a ZnCharacterWriteStream which is expecting some kind of String. This is going to take some untangling so just turn off compression (which is on by default) and it seems to work. > On Jan 17, 2024, at 4:43 PM, Richard O'Keefe <raoknz@gmail.com> wrote: > > So the method is expecting some kind of string, but it received a > ByteArray, which is NOT any kind of string. > What's in the ByteArray? Where did it come from? Why isn't it a string? > > On Thu, 18 Jan 2024 at 04:34, sergio ruiz <sergio.rrd@gmail.com> wrote: >> >> Hi, all. >> >> I am working on creating a PDF with Artefact (https://github.com/pharo-contributions/Artefact) and am having an issue running the first example. >> >> the Example looks like: >> >> PDFDocument new add: (PDFPage new add: (PDFTextElement new text: 'Hello'; from: 10mm@10mm)); exportTo: 'test.pdf' asFileReference writeStream. >> >> >> When running this, I get the error: >> >> Instance of ByteArray did not understand #isByteString >> >> indeed, ByteArray does not have a method called isByteString. >> >> I have tried creating a method that returns either true or false (I tried them both), but I have not successfully built the PDF. >> >> The method calling isByteString looks like: >> >> >> ZnUTF8Encoder >> >> next: count putAll: string startingAt: offset toStream: stream >> "Write count characters from string starting at offset to stream." >> "Overwritten for performance reasons - create a fast path for byte strings" >> >> string isByteString >> ifTrue: [ self next: count putAllByteString: string startingAt: offset toStream: stream ] >> ifFalse: [ super next: count putAll: string startingAt: offset toStream: stream ] >> >> I TOTALLY get this. This is a whole bunch of very specific questions. But my ultimate goal is to take a deep dive into stream processing to figure this out. >> >> Thanks! >> >> ---- >> peace, >> sergio >> photographer, journalist, visionary >> >> Public Key: https://pgp.key-server.io/pks/lookup?op=get&search=0x69B08F58923AB3A2 >> #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV >> @sergio_101@mastodon.social >> https://sergio101.com >> http://www.codeandmusic.com >> http://www.twitter.com/sergio_101 >> http://www.facebook.com/sergio101 >>

I guess I’ll point you to the issue too. PDFStreamPrinter>printPDFDataStream: aPDFDataStream …… Line 13: (self compression) ifTrue: [ streamData := (self compressWithGZip: streamData) asByteArray ]. > On Jan 17, 2024, at 5:13 PM, Todd Blanchard via Pharo-users <pharo-users@lists.pharo.org> wrote: > > Try this: > > (PDFDocument new compression: false)add: (PDFPage new add: (PDFTextElement new text: 'Hello'; from: 10mm@10mm)); exportTo: 'test.pdf' asFileReference writeStream. > > Compression causes your string to be gzip’d which is a ByteArray and not a String of any kind. > > Unfortunately, the write stream is a ZnCharacterWriteStream which is expecting some kind of String. > > This is going to take some untangling so just turn off compression (which is on by default) and it seems to work. > >> On Jan 17, 2024, at 4:43 PM, Richard O'Keefe <raoknz@gmail.com> wrote: >> >> So the method is expecting some kind of string, but it received a >> ByteArray, which is NOT any kind of string. >> What's in the ByteArray? Where did it come from? Why isn't it a string? >> >> On Thu, 18 Jan 2024 at 04:34, sergio ruiz <sergio.rrd@gmail.com> wrote: >>> >>> Hi, all. >>> >>> I am working on creating a PDF with Artefact (https://github.com/pharo-contributions/Artefact) and am having an issue running the first example. >>> >>> the Example looks like: >>> >>> PDFDocument new add: (PDFPage new add: (PDFTextElement new text: 'Hello'; from: 10mm@10mm)); exportTo: 'test.pdf' asFileReference writeStream. >>> >>> >>> When running this, I get the error: >>> >>> Instance of ByteArray did not understand #isByteString >>> >>> indeed, ByteArray does not have a method called isByteString. >>> >>> I have tried creating a method that returns either true or false (I tried them both), but I have not successfully built the PDF. >>> >>> The method calling isByteString looks like: >>> >>> >>> ZnUTF8Encoder >>> >>> next: count putAll: string startingAt: offset toStream: stream >>> "Write count characters from string starting at offset to stream." >>> "Overwritten for performance reasons - create a fast path for byte strings" >>> >>> string isByteString >>> ifTrue: [ self next: count putAllByteString: string startingAt: offset toStream: stream ] >>> ifFalse: [ super next: count putAll: string startingAt: offset toStream: stream ] >>> >>> I TOTALLY get this. This is a whole bunch of very specific questions. But my ultimate goal is to take a deep dive into stream processing to figure this out. >>> >>> Thanks! >>> >>> ---- >>> peace, >>> sergio >>> photographer, journalist, visionary >>> >>> Public Key: https://pgp.key-server.io/pks/lookup?op=get&search=0x69B08F58923AB3A2 >>> #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV >>> @sergio_101@mastodon.social >>> https://sergio101.com >>> http://www.codeandmusic.com >>> http://www.twitter.com/sergio_101 >>> http://www.facebook.com/sergio101 >>>

Thanks for the input everyone! I ended up just removing the compression.. In this case, this is not critical at all, so I can live with this.. Thanks, all! > On Jan 17, 2024, at 7:18 PM, Todd Blanchard via Pharo-users <pharo-users@lists.pharo.org> wrote: > > I guess I’ll point you to the issue too. > > PDFStreamPrinter>printPDFDataStream: aPDFDataStream > …… > Line 13: (self compression) ifTrue: [ streamData := (self compressWithGZip: streamData) asByteArray ]. ---- peace, sergio photographer, journalist, visionary Public Key: https://pgp.key-server.io/pks/lookup?op=get&search=0x69B08F58923AB3A2 #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV @sergio_101@mastodon.social https://sergio101.com http://www.codeandmusic.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101