[poppler] About pdf to image

[suzuki toshiya]

Hi,

Good to hear that your target platform is Ubuntu, yes, what I mean
is the utilization of ramdisk-like filesystem. Please check the output
of the command "cat /proc/mounts". I guess there might be some entries
including the word "tmpfs" (maybe "/dev/shm" would be there). It is
the files system like ramdisk, so writing/removing files in there would
be faster than those in the harddisks. Please check if tmpfs will serve
for your purpose.

Regards,
mpsuzuki

杨辉强 wrote:
> Hi, mpsuzuki:
>    Thank you very much. My system is ubuntu. I don't know much about 
> memory-based file system.
> Does it mean utility such as ramdisk.
> 
> On 12/19/2011 12:01 PM, suzuki toshiya wrote:
>> Hi,
>>
>> I guess poppler should have something you want, at least
>> internally, because the bindings for other frameworks (Qt,
>> GLib, cpp etc) may deal with the images without creating/
>> cleaning temporary image files.
>>
>> BTW, before searching such, I want to ask an off-topic question;
>> your target operating system does not support memory-based
>> file system?
>>
>> Regards,
>> mpsuzuki
>>
>> 杨辉强 wrote:
>>> Hi, all:
>>>   Thank Brad. I don't want to save images into files and then read 
>>> files into memory.
>>> The disk IO expense is high. So what's the utility from another 
>>> application can do this job? Wish your advice.
>>>
>>> Thank you!
>>>
>>> On Sun, 18 Dec 2011 11:34:17 AM Brad Hards wrote:
>>>
>>> This should have gone to a mailing list.
>>>
>>> How are you possibly going to use the utility from another 
>>> application and
>>> copy to memory without making any code changes?
>>>
>>> Brad
>>>
>>>
>>>
>>> On 12/18/2011 08:47 AM, 杨辉强 wrote:
>>>> Hi, all:
>>>>    In web search engine, I want to support the pdf snapshot. So I 
>>>> want to convert pdf files to images and save the images in a 
>>>> database. I don't want to change the poppler code.
>>>> Because that's notconvenient for upgrade the poppler's code.
>>>>
>>>> Thank you for your precious advices.
>>>>
>>>> On 12/17/2011 03:16 PM, Brad Hards wrote:
>>>>> On Sat, 17 Dec 2011 02:09:21 PM 杨辉强 wrote:
>>>>>>      I am a newbie to poppler. I use utils/pdftoppm.cc to convert 
>>>>>> a pdf
>>>>>> file into jpeg images.The generated images are save to disk files. 
>>>>>> Now I
>>>>>> wish to know whether it can save the images in memory such as a
>>>>>> vector<std::string>.  Wishing you can give me some advices.
>>>>> I'm sure that is possible, but you'd need to make some code changes 
>>>>> (and
>>>>> consider whether an arbitrary binary blob, containing nulls, is 
>>>>> really a good
>>>>> idea in a std::string). The code changes should basically be taking 
>>>>> the
>>>>> existing output writer and copying in to a memory location instead. 
>>>>> I don't
>>>>> see you'd need to make any real popper changes. How you integrate 
>>>>> that depends
>>>>> on the application you're trying to create.
>>>>>
>>>>> What is the end-use for this?
>>>>>
>>>>> Brad
>>>>> _______________________________________________
>>>>> poppler mailing list
>>>>> poppler at lists.freedesktop.org
>>>>> http://lists.freedesktop.org/mailman/listinfo/poppler
>>>>
>>>>
>>>> _______________________________________________
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>>>> poppler at lists.freedesktop.org
>>>> http://lists.freedesktop.org/mailman/listinfo/poppler
>>>
>>>
>>>
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>>
>