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Add pdfioFileCreateOutput API (Issue #21)

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Michael R Sweet
2021-09-27 07:41:50 -04:00
parent 9f1cadf78b
commit d6746c08a4
10 changed files with 503 additions and 257 deletions
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25
pdfio-object.c
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@ -143,6 +143,9 @@ pdfioObjCreateStream(
pdfio_obj_t *obj, // I - Object
pdfio_filter_t filter) // I - Type of compression to apply
{
pdfio_obj_t *length_obj = NULL; // Length object, if any
// Range check input
if (!obj || obj->pdf->mode != _PDFIO_MODE_WRITE || obj->value.type != PDFIO_VALTYPE_DICT)
return (NULL);
@ -162,9 +165,23 @@ pdfioObjCreateStream(
// Write the header...
if (!_pdfioDictGetValue(obj->value.value.dict, "Length"))
{
// Need a Length key for the stream, add a placeholder that we can fill in
// later...
pdfioDictSetNumber(obj->value.value.dict, "Length", 0.0);
if (obj->pdf->output_cb)
{
// Streaming via an output callback, so add a placeholder length object
_pdfio_value_t length_value; // Length value
length_value.type = PDFIO_VALTYPE_NUMBER;
length_value.value.number = 0.0f;
length_obj = _pdfioFileCreateObj(obj->pdf, obj->pdf, &length_value);
pdfioDictSetObj(obj->value.value.dict, "Length", length_obj);
}
else
{
// Need a Length key for the stream, add a placeholder that we can fill in
// later...
pdfioDictSetNumber(obj->value.value.dict, "Length", 0.0);
}
}
if (!write_obj_header(obj))
@ -176,7 +193,7 @@ pdfioObjCreateStream(
obj->stream_offset = _pdfioFileTell(obj->pdf);
// Return the new stream...
return (_pdfioStreamCreate(obj, filter));
return (_pdfioStreamCreate(obj, length_obj, filter));
}