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Implement pdfioObjCopy and pdfioPageCopy, with tests.

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Michael R Sweet
2021-05-29 20:00:48 -04:00
parent 37842066c6
commit 35d22705fa
11 changed files with 244 additions and 68 deletions
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86
pdfio-file.c
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@@ -74,6 +74,35 @@ _pdfioFileAddMappedObject(
}
//
// '_pdfioFileAddPage()' - Add a page to a PDF file.
//
bool // O - `true` on success and `false` on failure
_pdfioFileAddPage(pdfio_file_t *pdf, // I - PDF file
pdfio_obj_t *obj) // I - Page object
{
// Add the page to the array of pages...
if (pdf->num_pages >= pdf->alloc_pages)
{
pdfio_obj_t **temp = (pdfio_obj_t **)realloc(pdf->pages, (pdf->alloc_pages + 16) * sizeof(pdfio_obj_t *));
if (!temp)
{
_pdfioFileError(pdf, "Unable to allocate memory for pages.");
return (false);
}
pdf->alloc_pages += 16;
pdf->pages = temp;
}
pdf->pages[pdf->num_pages ++] = obj;
return (true);
}
//
// 'pdfioFileClose()' - Close a PDF file and free all memory used for it.
//
@@ -252,25 +281,37 @@ pdfio_obj_t * // O - New object
pdfioFileCreateObject(
pdfio_file_t *pdf, // I - PDF file
pdfio_dict_t *dict) // I - Object dictionary
{
_pdfio_value_t value; // Object value
value.type = PDFIO_VALTYPE_DICT;
value.value.dict = dict;
return (_pdfioFileCreateObject(pdf, dict->pdf, &value));
}
//
// '_pdfioFileCreateObject()' - Create a new object in a PDF file with a value.
//
pdfio_obj_t * // O - New object
_pdfioFileCreateObject(
pdfio_file_t *pdf, // I - PDF file
pdfio_file_t *srcpdf, // I - Source PDF file, if any
_pdfio_value_t *value) // I - Object dictionary
{
pdfio_obj_t *obj; // New object
// Range check input...
if (!pdf || !dict)
{
if (pdf)
_pdfioFileError(pdf, "Missing object dictionary.");
if (!pdf)
return (NULL);
}
if (pdf->mode != _PDFIO_MODE_WRITE)
return (NULL);
if (dict->pdf != pdf)
dict = pdfioDictCopy(pdf, dict); // Copy dictionary to new PDF
// Allocate memory for the object...
if ((obj = (pdfio_obj_t *)calloc(1, sizeof(pdfio_obj_t))) == NULL)
{
@@ -297,10 +338,11 @@ pdfioFileCreateObject(
pdf->objs[pdf->num_objs ++] = obj;
// Initialize the object...
obj->pdf = pdf;
obj->number = pdf->num_objs;
obj->value.type = PDFIO_VALTYPE_DICT;
obj->value.value.dict = dict;
obj->pdf = pdf;
obj->number = pdf->num_objs;
if (value)
_pdfioValueCopy(pdf, &obj->value, srcpdf, value);
// Don't write anything just yet...
return (obj);
@@ -359,22 +401,8 @@ pdfioFileCreatePage(pdfio_file_t *pdf, // I - PDF file
if (!pdfioObjClose(page))
return (NULL);
// Add the page to the array of pages...
if (pdf->num_pages >= pdf->alloc_pages)
{
pdfio_obj_t **temp = (pdfio_obj_t **)realloc(pdf->pages, (pdf->alloc_pages + 16) * sizeof(pdfio_obj_t *));
if (!temp)
{
_pdfioFileError(pdf, "Unable to allocate memory for pages.");
return (NULL);
}
pdf->alloc_pages += 16;
pdf->pages = temp;
}
pdf->pages[pdf->num_pages ++] = page;
if (!_pdfioFileAddPage(pdf, page))
return (NULL);
// Create the contents stream...
return (pdfioObjCreateStream(contents, PDFIO_FILTER_FLATE));