Hello Albert,
Am 21.03.2013 23:46, schrieb Albert Astals Cid:
> El Dijous, 21 de març de 2013, a les 19:33:35, Adam Reichold va escriure:
> Hello,
>
> I just had a user point out to me that when using the Qt frontend's
> PDFConverter to save a file with changes (irrespective of whether some
> were actually made) will double the file size in every iteration.
> (Tested with it a few files using Poppler 0.22.1.)
>
> I suspect this has something to do with incrementally updating the
> document structure? Is this a known limitation in calculating the
> change set or something like that or should I rather open a bug report
> to track this?
>
>> This should not happen, are you saving the file over itself? Probably not,
>> last time i tried i think that destroyed the file :D
No, I am save to a different file in every step.
>> Also as far as i remember we have code that does nothing if you don't do any
>> change.
>
>> Cheers,
>> Albert
I attached a test case that triggers the behavior. Maybe my usage of the
PDFConverter is wrong. As it is, the program yields an 800 MB file from
starting with a 1.5 MB file for me, using Poppler 0.22.1.
Best regards, Adam.
> Best regards, Adam.
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#include <QDebug>
#include <QFile>
#include <QScopedPointer>
#include <poppler-qt4.h>
bool save(Poppler::Document* d, const QString& n)
{
QScopedPointer< Poppler::PDFConverter > c(d->pdfConverter());
c->setOutputFileName(n);
c->setPDFOptions(c->pdfOptions() | Poppler::PDFConverter::WithChanges);
return c->convert();
}
int main(int argc, char** argv)
{
if(argc != 2)
return 1;
Poppler::Document* d = Poppler::Document::load(argv[1]);
if(d == 0)
return 2;
qDebug() << "save:" << 1;
bool ok = save(d, "file1.pdf");
delete d;
if(!ok)
return 3;
qDebug() << "size:" << QFile("file1.pdf").size() / 1024;
for(int i = 1; i < 10; ++i)
{
Poppler::Document* d = Poppler::Document::load(QString("file%1.pdf").arg(i));
if(d == 0)
return 4;
qDebug() << "save:" << i;
bool ok = save(d, QString("file%1.pdf").arg(i+1));
delete d;
if(!ok)
return 5;
qDebug() << "size:" << QFile(QString("file%1.pdf").arg(i+1)).size() / 1024;
}
return 0;
}
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