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Improve font deserialization

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Even if we disable font fallback, after adding Cantarell Regular
to the custom fontmap, fontconfig will helpfully synthesize
Cantarell Bold for us. So, just don't check for the font at all.
If there is a url, add it to the fontmap and leave it up to the
serializing code to ensure that we don't end up with duplicate
fonts.
This commit is contained in:
Matthias Clasen 2024-06-03 07:45:42 -04:00
parent 2a05c04db7
commit 577e4afb3c
1 changed files with 77 additions and 62 deletions
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139
gsk/gskrendernodeparser.c
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@ -1113,84 +1113,70 @@ parse_font (GtkCssParser *parser,
if (font_name == NULL)
return FALSE;
if (context->fontmap)
font = font_from_string (context->fontmap, font_name, FALSE);
if (gtk_css_parser_has_url (parser))
{
char *url;
char *scheme;
GBytes *bytes;
GError *error = NULL;
GtkCssLocation start_location;
gboolean success = FALSE;
if (font != NULL)
start_location = *gtk_css_parser_get_start_location (parser);
url = gtk_css_parser_consume_url (parser);
if (url != NULL)
{
gtk_css_parser_error_value (parser, "A font with this name already exists.");
/* consume the url to avoid more errors */
url = gtk_css_parser_consume_url (parser);
g_free (url);
}
else
{
char *scheme;
GBytes *bytes;
GError *error = NULL;
GtkCssLocation start_location;
gboolean success = FALSE;
start_location = *gtk_css_parser_get_start_location (parser);
url = gtk_css_parser_consume_url (parser);
if (url != NULL)
scheme = g_uri_parse_scheme (url);
if (scheme && g_ascii_strcasecmp (scheme, "data") == 0)
{
scheme = g_uri_parse_scheme (url);
if (scheme && g_ascii_strcasecmp (scheme, "data") == 0)
{
bytes = gtk_css_data_url_parse (url, NULL, &error);
}
else
{
GFile *file;
bytes = gtk_css_data_url_parse (url, NULL, &error);
}
else
{
GFile *file;
file = g_file_new_for_uri (url);
bytes = g_file_load_bytes (file, NULL, NULL, &error);
g_object_unref (file);
}
g_free (scheme);
g_free (url);
if (bytes != NULL)
{
success = add_font_from_bytes (context, bytes, &error);
g_bytes_unref (bytes);
}
if (!success)
{
gtk_css_parser_emit_error (parser,
&start_location,
gtk_css_parser_get_end_location (parser),
error);
}
file = g_file_new_for_uri (url);
bytes = g_file_load_bytes (file, NULL, NULL, &error);
g_object_unref (file);
}
if (success)
g_free (scheme);
g_free (url);
if (bytes != NULL)
{
font = font_from_string (context->fontmap, font_name, FALSE);
if (!font)
{
gtk_css_parser_error (parser,
GTK_CSS_PARSER_ERROR_UNKNOWN_VALUE,
&start_location,
gtk_css_parser_get_end_location (parser),
"The given url does not define a font named \"%s\"",
font_name);
}
success = add_font_from_bytes (context, bytes, &error);
g_bytes_unref (bytes);
}
/* Mark the font as created from a url, so we don't try to subset it again */
g_object_set_data (G_OBJECT (font), "from-url", GINT_TO_POINTER (1));
if (!success)
{
gtk_css_parser_emit_error (parser,
&start_location,
gtk_css_parser_get_end_location (parser),
error);
}
}
if (success)
{
font = font_from_string (context->fontmap, font_name, FALSE);
if (!font)
{
gtk_css_parser_error (parser,
GTK_CSS_PARSER_ERROR_UNKNOWN_VALUE,
&start_location,
gtk_css_parser_get_end_location (parser),
"The given url does not define a font named \"%s\"",
font_name);
}
}
}
else
{
if (context->fontmap)
font = font_from_string (context->fontmap, font_name, FALSE);
if (!font)
font = font_from_string (pango_cairo_font_map_get_default (), font_name, TRUE);
@ -3636,6 +3622,33 @@ append_texture_param (Printer *p,
g_bytes_unref (bytes);
}
static void
print_font (PangoFont *font)
{
PangoFontDescription *desc;
char *s;
hb_face_t *face;
hb_blob_t *blob;
const char *data;
unsigned int length;
char *csum;
desc = pango_font_describe_with_absolute_size (font);
s = pango_font_description_to_string (desc);
face = hb_font_get_face (pango_font_get_hb_font (font));
blob = hb_face_reference_blob (face);
data = hb_blob_get_data (blob, &length);
csum = g_compute_checksum_for_data (G_CHECKSUM_SHA256, (const guchar *)data, length);
g_print ("%s, face %p, sha %s\n", s, face, csum);
g_free (csum);
hb_blob_destroy (blob);
g_free (s);
}
static void
gsk_text_node_serialize_font (GskRenderNode *node,
Printer *p)
@ -3656,6 +3669,8 @@ gsk_text_node_serialize_font (GskRenderNode *node,
g_free (s);
pango_font_description_free (desc);
g_print ("serializing ");
print_font (font);
info = g_hash_table_lookup (p->fonts, hb_font_get_face (pango_font_get_hb_font (font)));
if (info->serialized)
return;