[poppler] [PATCH] JPEG support for pdftoppm

[Shen Liang]

I got there errors for the last poppler from git

make[2]: *** No rule to make target `goo/ImgWriter.cc', needed by 
`ImgWriter.lo'. Stop.
make[2]: Leaving directory `/mnt/sda8/projects/poppler/poppler/goo'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/mnt/sda8/projects/poppler/poppler'
make: *** [all] Error 2
shen at shen-laptop:/mnt/sda8/projects/poppler/poppler$ make
make all-recursive
make[1]: Entering directory `/mnt/sda8/projects/poppler/poppler'
Making all in goo
make[2]: Entering directory `/mnt/sda8/projects/poppler/poppler/goo'
make[2]: *** No rule to make target `goo/ImgWriter.cc', needed by 
`ImgWriter.lo'. Stop.
make[2]: Leaving directory `/mnt/sda8/projects/poppler/poppler/goo'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/mnt/sda8/projects/poppler/poppler'
make: *** [all] Error 2


Leonard Rosenthol wrote:
> You need the read the section on linearization in the PDF Reference/ISO
> 32000-1 as those are the files that have been prepared for use with "http
> byte streaming".  You are going ot need to add the necessary code to Poppler
> to read/parse/understand that information so that you can more reasonably
> fetch the information necessary to quickly display the first chunk of info.
>
> After that, then doing dynamic reads is more in line.  However, be aware
> that when dealing with documents that use object streams, the complexity
> goes up...
>
> Leonard
>
>
> On 10/8/09 7:49 PM, "Stefan Thomas" <moon at justmoon.net> wrote:
>
>   
>> Hey,
>>
>>     
>>> Commited, fixed a small thing (virtual destructor needed) myself.
>>>   
>>>       
>> Woohoo! :)
>>
>>
>>     
>>> Thanks for contributing! Stay around and code something else ;-)
>>>   
>>>       
>> I'm planning to add HTTP streaming support to poppler. Similar to the
>> way Adobe Reader does it. We need this functionality for a project, so I
>> can't promise my patch will be suitable for mainline poppler. But I'll
>> definitely post it and we'll see how hard it would be to get it ready
>> for prime time and whether there is even a demand for it.
>>
>> My basic plan is to create a new class HttpStream, extending BaseStream,
>> adding libcurl as an optional dependency and just do partial requests
>> whenever a substream is created. That should work, but performance would
>> be dreadful. To improve it I would add a cache of some sort and some way
>> for higher level functions to request prefetching of larger chunks of
>> the file in advance.
>>
>> If you have any thoughts on the matter or if there have been any
>> previous efforts towards this I'd love to hear it!
>>
>> Cheers,
>>
>> Stefan
>>
>>
>> _______________________________________________
>> poppler mailing list
>> poppler at lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/poppler
>>     
>
>   

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