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Add support for writing the PCLm subset of PDF (Issue #99)

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Michael R Sweet
2025-02-20 18:18:53 -05:00
parent 5be5552b2b
commit f09105dd3f
4 changed files with 83 additions and 15 deletions
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33
pdfio-file.c
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@@ -165,7 +165,8 @@ pdfioFileClose(pdfio_file_t *pdf) // I - PDF file
// name of the PDF file to create.
//
// The "version" argument specifies the PDF version number for the file or
// `NULL` for the default ("2.0").
// `NULL` for the default ("2.0"). The value "PCLm-1.0" can be specified to
// produce the PCLm subset of PDF.
//
// The "media_box" and "crop_box" arguments specify the default MediaBox and
// CropBox for pages in the PDF file - if `NULL` then a default "Universal" size
@@ -397,7 +398,9 @@ _pdfioFileCreateObj(
// ```
//
// The "version" argument specifies the PDF version number for the file or
// `NULL` for the default ("2.0").
// `NULL` for the default ("2.0"). Unlike @link pdfioFileCreate@ and
// @link pdfioFileCreateTemporary@, it is generally not safe to pass the
// "PCLm-1.0" version string.
//
// The "media_box" and "crop_box" arguments specify the default MediaBox and
// CropBox for pages in the PDF file - if `NULL` then a default "Universal" size
@@ -532,8 +535,19 @@ pdfioFileCreateStringObj(
//
// This function creates a PDF file with a unique filename in the current
// temporary directory. The temporary file is stored in the string "buffer" an
// will have a ".pdf" extension. Otherwise, this function works the same as
// the @link pdfioFileCreate@ function.
// will have a ".pdf" extension.
//
// The "version" argument specifies the PDF version number for the file or
// `NULL` for the default ("2.0"). The value "PCLm-1.0" can be specified to
// produce the PCLm subset of PDF.
//
// The "media_box" and "crop_box" arguments specify the default MediaBox and
// CropBox for pages in the PDF file - if `NULL` then a default "Universal" size
// of 8.27x11in (the intersection of US Letter and ISO A4) is used.
//
// The "error_cb" and "error_cbdata" arguments specify an error handler callback
// and its data pointer - if `NULL` the default error handler is used that
// writes error messages to `stderr`.
//
// @since PDFio v1.1@
//
@@ -1396,7 +1410,7 @@ create_common(
pdf->output_cb = output_cb;
pdf->output_ctx = output_cbdata;
pdf->filename = strdup(filename);
pdf->version = strdup(version);
pdf->version = strdup(!strncmp(version, "PCLm-", 5) ? "1.4" : version);
pdf->mode = _PDFIO_MODE_WRITE;
pdf->error_cb = error_cb;
pdf->error_data = error_cbdata;
@@ -1427,8 +1441,15 @@ create_common(
}
// Write a standard PDF header...
if (!_pdfioFilePrintf(pdf, "%%PDF-%s\n%%\342\343\317\323\n", version))
if (!strncmp(version, "PCLm-", 5))
{
if (!_pdfioFilePrintf(pdf, "%%PDF-1.4\n%%%s\n", version))
goto error;
}
else if (!_pdfioFilePrintf(pdf, "%%PDF-%s\n%%\342\343\317\323\n", version))
{
goto error;
}
// Create the pages object...
if ((dict = pdfioDictCreate(pdf)) == NULL)