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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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11
examples/code128.c
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@@ -23,7 +23,6 @@
// extended characters are ignored in the source string.
//
static char * // O - Output string
make_code128(char *dst, // I - Destination buffer
const char *src, // I - Source string
@@ -54,9 +53,9 @@ make_code128(char *dst, // I - Destination buffer
static const char code128_start_code_a = '\313';
// Start code A
static const char code128_start_code_b = '\314';
// Start code A
// Start code B
static const char code128_start_code_c = '\315';
// Start code A
// Start code C
static const char code128_stop = '\316';
// Stop pattern
@@ -149,7 +148,7 @@ main(int argc, // I - Number of command-line arguments
// Load fonts...
barcode_font = pdfioFileCreateFontObjFromFile(pdf, "code128.ttf", /*unicode*/false);
if (text)
text_font = pdfioFileCreateFontObjFromFile(pdf, "../testfiles/OpenSans-Regular.ttf", /*unicode*/true);
text_font = pdfioFileCreateFontObjFromBase(pdf, "Helvetica");
// Generate Code128 characters for the desired barcode...
if (!(barcode[0] & 0x80))
@@ -182,7 +181,7 @@ main(int argc, // I - Number of command-line arguments
page_st = pdfioFileCreatePage(pdf, page_dict);
// Draw the page...
pdfioContentSetStrokeColorGray(page_st, 0.0);
pdfioContentSetFillColorGray(page_st, 0.0);
pdfioContentSetTextFont(page_st, "B128", barcode_height);
pdfioContentTextBegin(page_st);
@@ -195,7 +194,7 @@ main(int argc, // I - Number of command-line arguments
pdfioContentSetTextFont(page_st, "TEXT", text_height);
pdfioContentTextBegin(page_st);
pdfioContentTextMoveTo(page_st, 0.5 * (media_box.x2 - text_width), 9.0);
pdfioContentTextShow(page_st, /*unicode*/true, text);
pdfioContentTextShow(page_st, /*unicode*/false, text);
pdfioContentTextEnd(page_st);
}