[buffer] Start implementing buffer deserialization
diff --git a/src/hb-buffer-serialize.cc b/src/hb-buffer-serialize.cc
index bd23208..d7c92c6 100644
--- a/src/hb-buffer-serialize.cc
+++ b/src/hb-buffer-serialize.cc
@@ -212,7 +212,6 @@
unsigned int sconsumed;
if (!buf_consumed)
buf_consumed = &sconsumed;
-
*buf_consumed = 0;
assert ((!buffer->len && buffer->content_type == HB_BUFFER_CONTENT_TYPE_INVALID) ||
@@ -243,13 +242,72 @@
}
}
+
+static hb_bool_t
+_hb_buffer_deserialize_glyphs_json (hb_buffer_t *buffer,
+ const char *buf,
+ unsigned int buf_len,
+ unsigned int *buf_consumed,
+ hb_font_t *font)
+{
+ return false;
+}
+
+static hb_bool_t
+_hb_buffer_deserialize_glyphs_text (hb_buffer_t *buffer,
+ const char *buf,
+ unsigned int buf_len,
+ unsigned int *buf_consumed,
+ hb_font_t *font)
+{
+ return false;
+}
+
hb_bool_t
hb_buffer_deserialize_glyphs (hb_buffer_t *buffer,
const char *buf,
- unsigned int buf_len, /* -1 means nul-terminated */
+ int buf_len, /* -1 means nul-terminated */
unsigned int *buf_consumed, /* May be NULL */
hb_font_t *font, /* May be NULL */
hb_buffer_serialize_format_t format)
{
- return false;
+ unsigned int sconsumed;
+ if (!buf_consumed)
+ buf_consumed = &sconsumed;
+ *buf_consumed = 0;
+
+ assert ((!buffer->len && buffer->content_type == HB_BUFFER_CONTENT_TYPE_INVALID) ||
+ buffer->content_type == HB_BUFFER_CONTENT_TYPE_GLYPHS);
+
+ if (buf_len == -1)
+ buf_len = strlen (buf);
+
+ if (!buf_len)
+ {
+ *buf_consumed = 0;
+ return true;
+ }
+
+ hb_buffer_set_content_type (buffer, HB_BUFFER_CONTENT_TYPE_GLYPHS);
+
+ if (!font)
+ font = hb_font_get_empty ();
+
+ switch (format)
+ {
+ case HB_BUFFER_SERIALIZE_FORMAT_TEXT:
+ return _hb_buffer_deserialize_glyphs_text (buffer,
+ buf, buf_len, buf_consumed,
+ font);
+
+ case HB_BUFFER_SERIALIZE_FORMAT_JSON:
+ return _hb_buffer_deserialize_glyphs_json (buffer,
+ buf, buf_len, buf_consumed,
+ font);
+
+ default:
+ case HB_BUFFER_SERIALIZE_FORMAT_INVALID:
+ return false;
+
+ }
}
