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ttf: Load from file pointer #171

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Merged
AndreRenaud merged 2 commits into from
Apr 19, 2026
Merged

ttf: Load from file pointer #171

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ttf: Load from file pointer
AndreRenaud Apr 19, 2026
b798ae9
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AndreRenaud Apr 19, 2026
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21 changes: 11 additions & 10 deletions pdfgen.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1160,7 +1160,17 @@ int pdf_set_font(struct pdf_doc *pdf, const char *font)

int pdf_set_font_ttf(struct pdf_doc *pdf, const char *path)
{
FILE *fp;
FILE *fp = fopen(path, "rb");
if (!fp)
return pdf_set_err(pdf, -errno, "Unable to open font file '%s': %s",
path, strerror(errno));
int err = pdf_set_font_ttf_file(pdf, fp, path);
fclose(fp);
return err;
}

int pdf_set_font_ttf_file(struct pdf_doc *pdf, FILE *fp, const char *path)
{
uint8_t *font_data;
size_t font_data_len;
struct pdf_object *font_obj, *descriptor_obj, *stream_obj, *cid_obj;
Expand All @@ -1180,30 +1190,21 @@ int pdf_set_font_ttf(struct pdf_doc *pdf, const char *path)
char font_name[64];
struct stat st;

fp = fopen(path, "rb");
if (!fp)
return pdf_set_err(pdf, -errno, "Unable to open font file '%s': %s",
path, strerror(errno));

if (fstat(fileno(fp), &st) < 0) {
fclose(fp);
return pdf_set_err(pdf, -errno, "Unable to stat font file '%s': %s",
path, strerror(errno));
}
font_data_len = (size_t)st.st_size;
font_data = (uint8_t *)malloc(font_data_len);
if (!font_data) {
fclose(fp);
return pdf_set_err(pdf, -ENOMEM,
"Unable to allocate %zu bytes for font '%s'",
font_data_len, path);
}
if (fread(font_data, 1, font_data_len, fp) != font_data_len) {
free(font_data);
fclose(fp);
return pdf_set_err(pdf, -EIO, "Unable to read font file '%s'", path);
}
fclose(fp);

if (font_data_len < 12) {
free(font_data);
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11 changes: 11 additions & 0 deletions pdfgen.h
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Original file line number Diff line number Diff line change
Expand Up @@ -342,6 +342,17 @@ int pdf_set_font(struct pdf_doc *pdf, const char *font);
*/
int pdf_set_font_ttf(struct pdf_doc *pdf, const char *path);

/**
* Sets the font to use for text objects by loading a TrueType font file from
* a FILE pointer.
*
* @param pdf PDF document to update font on
* @param fp TTF font file pointer (must be readable and seekable)
* @param path Name of font for error messages and for internal PDF reference
* @return < 0 on failure, 0 on success
*/
int pdf_set_font_ttf_file(struct pdf_doc *pdf, FILE *fp, const char *path);

/**
* Calculate the width of a given string in the current font
* @param pdf PDF document
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