Add simple fonts with 8-bit greek and cyrillic encodings.

Use KOI8-U for Cyrillic, and ISO 8859-7 for Greek.

Use with 'mutool create' using an extra argument to the %%Font directive:

    %%Font TmRmC Times-Roman Cyrillic
    BT
    /TmRmC 16 Tf 10 10 Td
    <fa c4 d2 c1 d7 d3 d4 d7 d5 ca d4 c5 21> Tj
    ET

The alternatives are "Latin", "Greek", and "Cyrillic".

1 files changed, 38 insertions, 0 deletions

diff --git a/source/pdf/pdf-encoding.c b/source/pdf/pdf-encoding.c
index 0b2cdfca..04874457 100644
--- a/source/pdf/pdf-encoding.c
+++ b/source/pdf/pdf-encoding.c
@@ -85,3 +85,41 @@ pdf_lookup_agl_duplicates(int ucs)
 	}
 	return empty_dup_list;
 }
+
+int pdf_cyrillic_from_unicode(int u)
+{
+	int l = 0;
+	int r = nelem(koi8u_from_unicode) - 1;
+	if (u < 128)
+		return u;
+	while (l <= r)
+	{
+		int m = (l + r) >> 1;
+		if (u < koi8u_from_unicode[m].u)
+			r = m - 1;
+		else if (u > koi8u_from_unicode[m].u)
+			l = m + 1;
+		else
+			return koi8u_from_unicode[m].c;
+	}
+	return -1;
+}
+
+int pdf_greek_from_unicode(int u)
+{
+	int l = 0;
+	int r = nelem(iso8859_7_from_unicode) - 1;
+	if (u < 128)
+		return u;
+	while (l <= r)
+	{
+		int m = (l + r) >> 1;
+		if (u < iso8859_7_from_unicode[m].u)
+			r = m - 1;
+		else if (u > iso8859_7_from_unicode[m].u)
+			l = m + 1;
+		else
+			return iso8859_7_from_unicode[m].c;
+	}
+	return -1;
+}