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Lay the groundwork for object streams.

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Michael R Sweet 2025-02-21 15:33:27 -05:00
parent f09105dd3f
commit aa6a20c042
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2 changed files with 38 additions and 1 deletions
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34
pdfio-file.c
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@ -26,6 +26,7 @@ static bool load_obj_stream(pdfio_obj_t *obj);
static bool load_pages(pdfio_file_t *pdf, pdfio_obj_t *obj, size_t depth); static bool load_pages(pdfio_file_t *pdf, pdfio_obj_t *obj, size_t depth);
static bool load_xref(pdfio_file_t *pdf, off_t xref_offset, pdfio_password_cb_t password_cb, void *password_data); static bool load_xref(pdfio_file_t *pdf, off_t xref_offset, pdfio_password_cb_t password_cb, void *password_data);
static bool repair_xref(pdfio_file_t *pdf, pdfio_password_cb_t password_cb, void *password_data); static bool repair_xref(pdfio_file_t *pdf, pdfio_password_cb_t password_cb, void *password_data);
static bool write_obj_streams(pdfio_file_t *pdf);
static bool write_pages(pdfio_file_t *pdf); static bool write_pages(pdfio_file_t *pdf);
static bool write_trailer(pdfio_file_t *pdf); static bool write_trailer(pdfio_file_t *pdf);
@ -121,7 +122,7 @@ pdfioFileClose(pdfio_file_t *pdf) // I - PDF file
{ {
ret = false; ret = false;
if (pdfioObjClose(pdf->info_obj) && write_pages(pdf) && pdfioObjClose(pdf->root_obj) && write_trailer(pdf)) if (pdfioObjClose(pdf->info_obj) && write_pages(pdf) && write_obj_streams(pdf) && pdfioObjClose(pdf->root_obj) && write_trailer(pdf))
ret = _pdfioFileFlush(pdf); ret = _pdfioFileFlush(pdf);
} }
@ -2343,6 +2344,37 @@ repair_xref(
} }
//
// 'write_obj_streams()' - Write object streams...
//
static bool // O - `true` on success, `false` on error
write_obj_streams(pdfio_file_t *pdf) // I - PDF file
{
size_t i; // Looping var
pdfio_obj_t *obj; // Current object
// Object streams are part of PDF 1.5 and later...
if (strcmp(pdf->version, "1.5") < 0)
return (true);
// Loop through the file objects and write any to an object stream...
for (i = 0; i < pdf->num_objs; i ++)
{
obj = pdf->objs[i];
if (obj->offset > 0)
continue;
if (!_pdfioObjWriteHeader(obj) || !_pdfioFilePuts(pdf, "endobj\n"))
return (false);
}
return (true);
}
// //
// 'write_pages()' - Write the PDF pages objects. // 'write_pages()' - Write the PDF pages objects.
// //

5
pdfio-object.c
View File

@ -34,6 +34,11 @@ pdfioObjClose(pdfio_obj_t *obj) // I - Object
// Write what remains for the object... // Write what remains for the object...
if (!obj->offset) if (!obj->offset)
{ {
// If we are writing a PDF 1.5 or later object, put all value-only objects
// in object streams...
if (obj != obj->pdf->encrypt_obj && obj != obj->pdf->info_obj && obj != obj->pdf->root_obj && strcmp(obj->pdf->version, "1.5") >= 0)
return (true);
// Write the object value // Write the object value
if (!_pdfioObjWriteHeader(obj)) if (!_pdfioObjWriteHeader(obj))
return (false); return (false);