static void expandstream(fz_obj *obj, int num, int gen)
{
fz_error error;
fz_buffer *buf, *tmp;
fz_obj *newlen;
error = pdf_loadstream(&buf, xref, num, gen);
if (error)
die(error);
fz_dictdels(obj, "Filter");
fz_dictdels(obj, "DecodeParms");
if (doascii && isbinarystream(buf))
{
tmp = hexbuf(buf->data, buf->len);
fz_dropbuffer(buf);
buf = tmp;
addhexfilter(obj);
}
newlen = fz_newint(buf->len);
fz_dictputs(obj, "Length", newlen);
fz_dropobj(newlen);
fprintf(out, "%d %d obj\n", num, gen);
fz_fprintobj(out, obj, !doexpand);
fprintf(out, "stream\n");
fwrite(buf->data, 1, buf->len, out);
fprintf(out, "endstream\nendobj\n\n");
fz_dropbuffer(buf);
}
fz_error*
setPageMediaBox(
pdf_xref* pdfXRef,
fz_obj* pageObj,
fz_rect mediaBox
)
{
fz_error *error;
fz_obj *objMedia;
fz_irect mRect;
fz_obj *objInt;
// Delete the CropBox. This is done because we are reducing
// the size of the media box and CropBox is of no use to us
fz_dictdels(pageObj, "CropBox");
//objMedia = fz_dictgets(pageObj, "CropBox");
//if (objMedia == NULL) return fz_throw("no CropBox entry");
//error = pdf_resolve(&objMedia, pdfXRef);
//if (error) return fz_rethrow(error, "cannot resolve page bounds");
//if (! fz_isarray(objMedia)) return fz_throw("cannot find page bounds");
//fz_rect cRect = pdf_torect(objMedia);
// Get the media box
objMedia = fz_dictgets(pageObj, "MediaBox");
if (objMedia == NULL) return fz_throw("no MediaBox entry");
error = pdf_resolve(&objMedia, pdfXRef);
if (error) return fz_rethrow(error, "cannot resolve page bounds");
if (! fz_isarray(objMedia)) return fz_throw("cannot find page bounds");
// We have the MediaBox array here
mRect = fz_roundrect(mediaBox);
error = fz_newint(&objInt, mRect.x0);
if (error) return fz_rethrow(error, "cannot allocate int");
fz_arrayput(objMedia, 0, objInt);
fz_dropobj(objInt);
error = fz_newint(&objInt, mRect.y0);
if (error) return fz_rethrow(error, "cannot allocate int");
fz_arrayput(objMedia, 1, objInt);
fz_dropobj(objInt);
error = fz_newint(&objInt, mRect.x1);
if (error) return fz_rethrow(error, "cannot allocate int");
fz_arrayput(objMedia, 2, objInt);
fz_dropobj(objInt);
error = fz_newint(&objInt, mRect.y1);
if (error) return fz_rethrow(error, "cannot allocate int");
fz_arrayput(objMedia, 3, objInt);
fz_dropobj(objInt);
return NULL;
}
void
cleanexpand(void)
{
fz_error *error;
fz_obj *stmobj;
fz_buffer *buf;
fz_obj *stmlen;
int i, gen;
for (i = 0; i < src->len; i++)
{
if (src->table[i].type == 'n')
{
gen = src->table[i].gen;
if (pdf_isstream(src, i, gen))
{
error = pdf_loadobject(&stmobj, src, i, gen);
if (error) die(error);
error = pdf_loadstream(&buf, src, i, gen);
if (error) die(error);
fz_dictdels(stmobj, "Filter");
fz_dictdels(stmobj, "DecodeParms");
error = fz_newint(&stmlen, buf->wp - buf->rp);
if (error) die(error);
error = fz_dictputs(stmobj, "Length", stmlen);
if (error) die(error);
fz_dropobj(stmlen);
pdf_updateobject(src, i, gen, stmobj);
pdf_updatestream(src, i, gen, buf);
fz_dropobj(stmobj);
}
}
}
}
void
editcopy(int pagenum)
{
fz_error *error;
fz_obj *obj;
fz_obj *ref;
fz_obj *num;
printf("copy %s page %d\n", srcname, pagenum);
ref = srcpages->pref[pagenum - 1];
obj = pdf_getpageobject(srcpages, pagenum - 1);
fz_dictdels(obj, "Parent");
/*
fz_dictdels(obj, "B");
fz_dictdels(obj, "PieceInfo");
fz_dictdels(obj, "Metadata");
fz_dictdels(obj, "Annots");
fz_dictdels(obj, "Tabs");
*/
pdf_updateobject(src, fz_tonum(ref), fz_togen(ref), obj);
error = fz_arraypush(editobjects, ref);
if (error)
die(error);
error = fz_newint(&num, editmode);
if (error)
die(error);
error = fz_arraypush(editmodelist, num);
if (error)
die(error);
fz_dropobj(num);
}
int
copyPdfFile(
soPdfFile* inFile,
soPdfFile* outFile
)
{
fz_error *error;
int pageTreeNum, pageTreeGen;
assert(inFile != NULL);
assert(outFile != NULL);
//
// Process every page in the source file
//
{
printf("\nProcessing input page : ");
for (int pageNo = 0; pageNo < pdf_getpagecount(inFile->pageTree); pageNo++)
{
displayPageNumber(pageNo + 1, !pageNo);
// Get the page object from the source
fz_obj *pageRef = inFile->pageTree->pref[pageNo];
fz_obj *pageObj = pdf_getpageobject(inFile->pageTree, pageNo);
//
// Process the page. Each page can be split into up-to 3 pages
//
fz_rect bbRect[3];
error = processPage(inFile, pageNo, bbRect, 3);
if (error)
return soPdfError(error);
for (int ctr = 0; ctr < 3; ctr++)
{
// Check if this was a blank page
if (fz_isemptyrect(bbRect[ctr]))
break;
//
// copy the source page dictionary entry. The way this is done is basically
// by making a copy of the page dict object in the source file, and adding
// the copy in the source file. Then the copied page dict object is
// referenced and added to the destination file.
//
// This convoluted procedure is done because the copy is done by pdf_transplant
// function that accepts a source and destination. Whatever is referenced by
// destination object is deep copied
//
// allocate an object id and generation id in source file
//
// There is a bug in mupdf where the object allocation returns
// 0 oid and 0 gid when the input pdf file has iref stream
// so to work around the issue, we wrap the pdf_allocojbect
// in a for loop 10 times to get the number
//
int sNum, sGen, tries;
for (tries = 0; tries < 10; tries++)
{
error = pdf_allocobject(inFile->xref, &sNum, &sGen);
if (error)
return soPdfError(error);
// If sNum is non zero then the allocation was successful
if (sNum != 0)
break;
pdf_updateobject(inFile->xref, sNum, sGen, pageObj);
}
// If we didn't succeed even after 10 tries then this file
// is not going to work.
if (tries >= 10)
return soPdfError(fz_throw("cannot allocate object because of mupdf bug"));
// make a deep copy of the original page dict
fz_obj *pageObj2;
error = fz_deepcopydict(&pageObj2, pageObj);
if (error)
return soPdfError(error);
// update the source file with the duplicate page object
pdf_updateobject(inFile->xref, sNum, sGen, pageObj2);
fz_dropobj(pageObj2);
// create an indirect reference to the page object
fz_obj *pageRef2;
error = fz_newindirect(&pageRef2, sNum, sGen);
if (error)
return soPdfError(error);
// delete the parent dictionary entry
// Do we need to delete any other dictionary entry
// like annot, tabs, metadata, etc
fz_dictdels(pageObj2, "Parent");
// Set the media box
setPageMediaBox(inFile->xref, pageObj2, bbRect[ctr]);
// Set the rotation based on input
switch(p_mode)
{
// no rotation if fit height
case FitHeight:
case Fit2xHeight:
break;
// rotate -90 deg if fit width
case Fit2xWidth:
case FitWidth:
setPageRotate(pageObj2, p_reverseLandscape ? 90 : -90);
break;
case SmartFitHeight:
case SmartFitWidth:
default:
return soPdfError(fz_throw("Mode(%d) not yet implemented.", p_mode));
break;
}
// push the indirect reference to the destination list for copy by pdf_transplant
error = fz_arraypush(outFile->editobjs, pageRef2);
if (error)
return soPdfError(error);
}
}
}
// flush the objects into destination from source
{
fz_obj *results;
int outPages;
printf("\nCopying output page : ");
error = pdf_transplant(outFile->xref, inFile->xref, &results, outFile->editobjs);
if (error)
return soPdfError(error);
outPages = fz_arraylen(results);
for (int ctr = 0; ctr < outPages; ctr++)
{
displayPageNumber(ctr + 1, !ctr);
error = fz_arraypush(outFile->pagelist, fz_arrayget(results,
p_reverseLandscape ? outPages - 1 - ctr : ctr));
if (error)
return soPdfError(error);
}
fz_dropobj(results);
}
// flush page tree
// Create page tree and add back-links
{
fz_obj *pageTreeObj;
fz_obj *pageTreeRef;
// allocate a new object in out file for pageTree object
error = pdf_allocobject(outFile->xref, &pageTreeNum, &pageTreeGen);
if (error)
return soPdfError(error);
// Create a page tree object
error = fz_packobj(&pageTreeObj, "<</Type/Pages/Count %i/Kids %o>>",
fz_arraylen(outFile->pagelist), outFile->pagelist);
if (error)
return soPdfError(error);
// Update the xref entry with the pageTree object
pdf_updateobject(outFile->xref, pageTreeNum, pageTreeGen, pageTreeObj);
fz_dropobj(pageTreeObj);
// Create a reference to the pageTree object
error = fz_newindirect(&pageTreeRef, pageTreeNum, pageTreeGen);
if (error)
return soPdfError(error);
//
// For every page in the output file, update the parent entry
//
for (int ctr = 0; ctr < fz_arraylen(outFile->pagelist); ctr++)
{
fz_obj *pageObj;
int num = fz_tonum(fz_arrayget(outFile->pagelist, ctr));
int gen = fz_togen(fz_arrayget(outFile->pagelist, ctr));
// Get the page object from xreft
error = pdf_loadobject(&pageObj, outFile->xref, num, gen);
if (error)
return soPdfError(error);
// Update the parent entry in the page dictionary
error = fz_dictputs(pageObj, "Parent", pageTreeRef);
if (error)
return soPdfError(error);
// Update the entry with the updated page object
pdf_updateobject(outFile->xref, num, gen, pageObj);
fz_dropobj(pageObj);
}
}
// Create catalog and root entries
{
fz_obj *catObj, *infoObj;
int rootNum, rootGen;
int infoNum, infoGen;
//
// Copy the info catalog to the destination
// alloc an object id and gen id in destination file
error = pdf_allocobject(outFile->xref, &infoNum, &infoGen);
if (error)
return soPdfError(error);
// make a deep copy of the original page dict
error = fz_deepcopydict(&infoObj, inFile->xref->info);
if (error)
return soPdfError(error);
// update the dest file with object
pdf_updateobject(outFile->xref, infoNum, infoGen, infoObj);
outFile->xref->info = infoObj;
fz_dropobj(infoObj);
//
// root/catalog object creation
error = pdf_allocobject(outFile->xref, &rootNum, &rootGen);
if (error)
return soPdfError(error);
error = fz_packobj(&catObj, "<</Type/Catalog /Pages %r>>", pageTreeNum, pageTreeGen);
if (error)
return soPdfError(error);
pdf_updateobject(outFile->xref, rootNum, rootGen, catObj);
fz_dropobj(catObj);
// Create trailer
error = fz_packobj(&outFile->xref->trailer, "<</Root %r /Info %r>>",
rootNum, rootGen, infoNum, infoGen);
if (error)
return soPdfError(error);
}
// Update the info in the target file and save the xref
printf("\nSaving.\n");
error = setPageInfo(inFile, outFile);
if (error)
return soPdfError(error);
error = pdf_savexref(outFile->xref, outFile->fileName, NULL);
if (error)
return soPdfError(error);
if (g_errorCount != 0)
{
printf("\nFollowing issues encounted were ignored.\n\n");
for (int ctr = g_errorCount - 1; ctr >= 0; ctr--)
soPdfError(g_errorList[ctr]);
}
printf("\nSaved.\n");
return 0;
}
void
pdf_loadpagetreenode(pdf_xref *xref, fz_obj *node, struct info info)
{
fz_obj *dict, *kids, *count;
fz_obj *obj, *tmp;
int i, n;
/* prevent infinite recursion */
if (fz_dictgets(node, ".seen"))
return;
kids = fz_dictgets(node, "Kids");
count = fz_dictgets(node, "Count");
if (fz_isarray(kids) && fz_isint(count))
{
obj = fz_dictgets(node, "Resources");
if (obj)
info.resources = obj;
obj = fz_dictgets(node, "MediaBox");
if (obj)
info.mediabox = obj;
obj = fz_dictgets(node, "CropBox");
if (obj)
info.cropbox = obj;
obj = fz_dictgets(node, "Rotate");
if (obj)
info.rotate = obj;
tmp = fz_newnull();
fz_dictputs(node, ".seen", tmp);
fz_dropobj(tmp);
n = fz_arraylen(kids);
for (i = 0; i < n; i++)
{
obj = fz_arrayget(kids, i);
pdf_loadpagetreenode(xref, obj, info);
}
fz_dictdels(node, ".seen");
}
else
{
dict = fz_resolveindirect(node);
if (info.resources && !fz_dictgets(dict, "Resources"))
fz_dictputs(dict, "Resources", info.resources);
if (info.mediabox && !fz_dictgets(dict, "MediaBox"))
fz_dictputs(dict, "MediaBox", info.mediabox);
if (info.cropbox && !fz_dictgets(dict, "CropBox"))
fz_dictputs(dict, "CropBox", info.cropbox);
if (info.rotate && !fz_dictgets(dict, "Rotate"))
fz_dictputs(dict, "Rotate", info.rotate);
if (xref->pagelen == xref->pagecap)
{
fz_warn("found more pages than expected");
xref->pagecap ++;
xref->pagerefs = fz_realloc(xref->pagerefs, sizeof(fz_obj*) * xref->pagecap);
xref->pageobjs = fz_realloc(xref->pageobjs, sizeof(fz_obj*) * xref->pagecap);
}
xref->pagerefs[xref->pagelen] = fz_keepobj(node);
xref->pageobjs[xref->pagelen] = fz_keepobj(dict);
xref->pagelen ++;
}
}
