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Fix CFF font bug

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This commit is contained in:
Martin Haug 2022-05-07 17:23:44 +02:00
parent 15ef72cca4
commit 49b8574b8d
1 changed files with 26 additions and 12 deletions
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38
src/export/pdf.rs
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@ -127,13 +127,11 @@ impl<'a> PdfExporter<'a> {
};
// Write the CID font referencing the font descriptor.
self.writer
.cid_font(cid_ref)
.subtype(subtype)
let mut cid = self.writer.cid_font(cid_ref);
cid.subtype(subtype)
.base_font(base_font)
.system_info(system_info)
.font_descriptor(descriptor_ref)
.cid_to_gid_map_predefined(Name(b"Identity"))
.widths()
.consecutive(0, {
let num_glyphs = ttf.number_of_glyphs();
@ -143,6 +141,12 @@ impl<'a> PdfExporter<'a> {
})
});
if subtype == CidFontType::Type2 {
cid.cid_to_gid_map_predefined(Name(b"Identity"));
}
cid.finish();
let mut flags = FontFlags::empty();
flags.set(FontFlags::SERIF, postscript_name.contains("Serif"));
flags.set(FontFlags::FIXED_PITCH, ttf.is_monospaced());
@ -165,8 +169,8 @@ impl<'a> PdfExporter<'a> {
let stem_v = 10.0 + 0.244 * (f32::from(ttf.weight().to_number()) - 50.0);
// Write the font descriptor (contains metrics about the font).
self.writer
.font_descriptor(descriptor_ref)
let mut font_descriptor = self.writer.font_descriptor(descriptor_ref);
font_descriptor
.name(base_font)
.flags(flags)
.bbox(bbox)
@ -174,8 +178,14 @@ impl<'a> PdfExporter<'a> {
.ascent(ascender)
.descent(descender)
.cap_height(cap_height)
.stem_v(stem_v)
.font_file2(data_ref);
.stem_v(stem_v);
match subtype {
CidFontType::Type0 => font_descriptor.font_file3(data_ref),
CidFontType::Type2 => font_descriptor.font_file2(data_ref),
};
font_descriptor.finish();
// Compute a reverse mapping from glyphs to unicode.
let cmap = {
@ -210,10 +220,14 @@ impl<'a> PdfExporter<'a> {
// Subset and write the face's bytes.
let buffer = face.buffer();
let subsetted = subset(buffer, face.index(), glyphs);
let data = subsetted.as_deref().unwrap_or(buffer);
self.writer
.stream(data_ref, &deflate(data))
.filter(Filter::FlateDecode);
let data = deflate(subsetted.as_deref().unwrap_or(buffer));
let mut font_stream = self.writer.stream(data_ref, &data);
if subtype == CidFontType::Type0 {
font_stream.pair(Name(b"Subtype"), Name(b"CIDFontType0C"));
}
font_stream.filter(Filter::FlateDecode).finish();
}
}