but I don't know how to operate the FileList opened by TIFFSelfTest displayResults... Thanks for making the changes, Koji. I've been able to narrow the problem down. What I've been trying to do is add a color TIFF image to the pdf, that is add a color bitmap. I would actually prefer to add a Form, but SPDF is TIFF centric.
TIFFImage has a class method TIFFImage fromFileNamed: aString ^self fromFile: (Filename named: aString)
where Filename doesn't exist as a class.
TIFFImage fromFile: aFilename | readStream | readStream := aFilename readStream. readStream binary. ^self fromByteArray: readStream contents
So I thought to add a class method fromFileWithName: aFilename | readStream | readStream := StandardFileStream readOnlyFileNamed: aFilename. readStream binary. ^self fromByteArray: readStream contents and duplicate test13 changing the image aquisition to
image := (TIFFImage fromFileWithName:'blokken.tif') directories first. If I put an uncompressed 24-bit TIFF in blokken.tif, an invalid pdf file is created. If I put in a uncompressed 4-bit TIFF with an odd width, the process halts with: Halt: No class is ready to handle tag #320. With an even width the invalid pdf is created again. A b/w tiff has the same problems but the 24-bit TIFF does not have the even/odd problems.
Stephan
Stephan,
In response to your message direct to me I have dug through the list archive and found your messages. Sorry I didn't pick up on them when you posted.
The following will appear to be a series of excuses ... and they are!
The library was written to help produce PDF reports for a web app written ~1998 using Visual Wave. The library was then extended for another project that needed to convert faxes (i.e. TIFF images) to PDF. It has since been extended for other projects and ported to other dialects. It's not a product and has no full time support team.
OK - that is the foundation for the excuses, now on to some specific ones:
On 30/01/07, Stephan Eggermont stephan@stack.nl wrote:
but I don't know how to operate the FileList opened by TIFFSelfTest displayResults...
In VisualWorks the FileList is a file browser. The display results method opens one of these on the results directory so you can have a look at the .results files which contain debugging information about a decoded TIFF image.
What I've been trying to do is add a color TIFF image to the pdf, that is add a color bitmap. I would actually prefer to add a Form, but SPDF is TIFF centric.
I started looking at a number of TIFF encodings early on, and it sounds like others have taken this further. In the end, for the project at hand we only needed the mono CCITT Group 4 run-length stuff to work, so that's all I made work.
TIFFImage has a class method TIFFImage fromFileNamed: aString ^self fromFile: (Filename named: aString)
where Filename doesn't exist as a class.
Filename is a class in VisualWorks. The idea is that this class understands the symbolic identifiers for file - i.e. file names. Other classes are used to access files in VisualWorks, the FileStream subclasses in fact. The classes supporting files in Squeak are quite different.
More recently I have put together the Sport library with the aim of being able to write most code to a consistent portable interface (that of Sport) and then have different implementations of Sport for each dialect. Sport is a kludge, though. What I'd really like to see the the Smalltalk ANSI standard moved along to include file classes ... and all the other things in Sport. But that won't be happening for a while, I fear. In the short term the SPDF library should be changed to use Sport so we have a single SPDF implementation that works with all Smalltalk dialects, but I certainly don't have spare volunteer time to look at that. I could find time in my professional (i.e. paid for) calendar, and indeed I do sometimes get paid to do things with the SPDF library - but not often, and not lately.
If I put an uncompressed 24-bit TIFF in blokken.tif, an invalid pdf file is created...
When I did the TIFF work I had to unpack the TIFF files because we could not get them to appear in a PDF file otherwise. These days the PDF spec allows one to embed graphical objects. So really, the way the library should work is to simply embed the compressed TIFF image in the PDF document and let the PDF reader worry about unpacking the image as needed. This would make the PDFs *much* smaller too.
Here endeth the excuses. Sorry everyone, the PDF library is what it is, warts and all. :-/
All the best, Bruce
Stephane a ecrit: TIFFImage has a class method TIFFImage fromFileNamed: aString ^self fromFile: (Filename named: aString)
where Filename doesn't exist as a class.
Bruce Badger wrote: "Filename is a class in VisualWorks. The idea is that this class understands the symbolic identifiers for file - i.e. file names. Other classes are used to access files in VisualWorks, the FileStream subclasses in fact. The classes supporting files in Squeak are quite different."
"More recently I have put together the Sport library with the aim of being able to write most code to a consistent portable >interface (that of Sport) and then have different implementations of Sport for each dialect. Sport is a kludge, though. What I'd really like to see the the Smalltalk ANSI standard moved along to include file classes ...and all the other things in Sport. But that won't be happening for a while, I fear. In the short term the SPDF library should be changed to use Sport so we have a single SPDF implementation that works with all Smalltalk dialects, but I certainly don't have spare volunteer time to look at that. I could find time in my professional (i.e. paid for) calendar, and indeed I do sometimes get paid to do things with the SPDF library - but not often, and not lately."
Another option for inter-Smalltal portability is the Passport library that I developed in order to make Chronos work on VisualWorks, Squeak and Dolphin. It provides the class ResourcePath, which is similar in many ways to VW's Filename class.
For more information, see my recent blog post on Passport: http://chronos-st.blogspot.com/2007/01/filenames-and-inter-smalltalk.html
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Alan Lovejoy -
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Stephan Eggermont