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Add some documentation on the code128 example.

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Clean up the code128 code a bit and use the Helvetica font for the text.

Add support for writing to a PDF file on the command-line vs. just doing
redirection.
This commit is contained in:
Michael R Sweet
2024-12-15 22:52:03 -05:00
parent f8639fbd64
commit 53967552df
3 changed files with 190 additions and 14 deletions
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19
examples/md2pdf.c
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@@ -8,6 +8,7 @@
//
// Usage:
//
// ./md2pdf FILENAME.md FILENAME.pdf
// ./md2pdf FILENAME.md >FILENAME.pdf
//
// The generated PDF file is formatted for a "universal" paper size (8.27x11",
@@ -262,9 +263,10 @@ main(int argc, // I - Number of command-line arguments
setbuf(stderr, NULL);
// Get the markdown file from the command-line...
if (argc != 2)
if (argc < 2 || argc > 3)
{
fputs("Usage: md2pdf FILENANE.md >FILENAME.pdf\n", stderr);
fputs("Usage: md2pdf FILENANE.md [FILENAME.pdf]\n", stderr);
fputs(" md2pdf FILENANE.md >FILENAME.pdf\n", stderr);
return (1);
}
@@ -289,13 +291,20 @@ main(int argc, // I - Number of command-line arguments
dd.title = mmdGetMetadata(doc, "title");
// Output a PDF file to the standard output...
if (argc == 2)
{
// Output a PDF file to the standard output...
#ifdef _WIN32
setmode(1, O_BINARY); // Force binary output on Windows
setmode(1, O_BINARY); // Force binary output on Windows
#endif // _WIN32
if ((dd.pdf = pdfioFileCreateOutput(output_cb, /*output_cbdata*/NULL, /*version*/NULL, /*media_box*/NULL, /*crop_box*/NULL, /*error_cb*/NULL, /*error_data*/NULL)) == NULL)
if ((dd.pdf = pdfioFileCreateOutput(output_cb, /*output_cbdata*/NULL, /*version*/NULL, /*media_box*/NULL, /*crop_box*/NULL, /*error_cb*/NULL, /*error_data*/NULL)) == NULL)
return (1);
}
else if ((dd.pdf = pdfioFileCreate(argv[2], /*version*/NULL, /*media_box*/NULL, /*crop_box*/NULL, /*error_cb*/NULL, /*error_data*/NULL)) == NULL)
{
return (1);
}
if ((value = mmdGetMetadata(doc, "author")) != NULL)
pdfioFileSetAuthor(dd.pdf, value);