static GF_Err ft_get_glyphs(GF_FontReader *dr, const char *utf_string, u32 *glyph_buffer, u32 *io_glyph_buffer_size, const char *xml_lang, Bool *is_rtl)
{
u32 len;
u32 i;
u16 *conv;
char *utf8 = (char*) utf_string;
FTBuilder *ftpriv = (FTBuilder *)dr->udta;
if (!ftpriv->active_face) return GF_BAD_PARAM;
/*TODO: glyph substitution / ligature */
len = utf_string ? strlen(utf_string) : 0;
if (!len) {
*io_glyph_buffer_size = 0;
return GF_OK;
}
if (*io_glyph_buffer_size < len+1) {
*io_glyph_buffer_size = len+1;
return GF_BUFFER_TOO_SMALL;
}
len = gf_utf8_mbstowcs((u16*) glyph_buffer, *io_glyph_buffer_size, (const char **) &utf8);
if ((s32)len<0) return GF_IO_ERR;
if (utf8) return GF_IO_ERR;
/*perform bidi relayout*/
conv = (u16*) glyph_buffer;
*is_rtl = gf_utf8_reorder_bidi(conv, len);
/*move 16bit buffer to 32bit*/
for (i=len; i>0; i--) {
glyph_buffer[i-1] = (u32) conv[i-1];
}
*io_glyph_buffer_size = len;
return GF_OK;
}
/*translate string to glyph sequence*/
static GF_Err svg_font_get_glyphs(void *udta, const char *utf_string, u32 *glyph_buffer, u32 *io_glyph_buffer_size, const char *lang, Bool *is_rtl)
{
u32 prev_c;
u32 len;
u32 i, gl_idx;
u16 *utf_res;
GF_Node *node = (GF_Node *)udta;
GF_ChildNodeItem *child;
char *utf8 = (char*) utf_string;
/*FIXME - use glyphs unicode attributes for glyph substitution*/
len = utf_string ? strlen(utf_string) : 0;
if (!len) {
*io_glyph_buffer_size = 0;
return GF_OK;
}
if (*io_glyph_buffer_size < len+1) {
*io_glyph_buffer_size = len+1;
return GF_BUFFER_TOO_SMALL;
}
len = gf_utf8_mbstowcs((u16*) glyph_buffer, *io_glyph_buffer_size, (const char**)&utf8);
if ((s32) len < 0) return GF_IO_ERR;
/*should not happen*/
if (utf8) return GF_IO_ERR;
/*perform bidi relayout*/
utf_res = (u16 *) glyph_buffer;
*is_rtl = gf_utf8_reorder_bidi(utf_res, len);
/*move 16bit buffer to 32bit*/
for (i=len; i>0; i--) {
glyph_buffer[i-1] = utf_res[i-1];
}
gl_idx = 0;
prev_c = 0;
for (i=0;i<len; i++) {
SVG_GlyphStack *missing_glyph = NULL;
SVG_GlyphStack *st = NULL;
child = ((GF_ParentNode *) node)->children;
while (child) {
u32 tag = gf_node_get_tag(child->node);
if (tag==TAG_SVG_missing_glyph) {
missing_glyph = gf_node_get_private(child->node);
} else if (tag ==TAG_SVG_glyph) {
Bool glyph_ok = 0;
SVGAllAttributes atts;
st = gf_node_get_private(child->node);
if (!st) {
child = child->next;
continue;
}
if (st->glyph.utf_name==glyph_buffer[i]) {
u32 j, count;
gf_svg_flatten_attributes((SVG_Element*)child->node, &atts);
if (!lang) {
glyph_ok = 1;
} else {
if (!atts.lang) {
glyph_ok = 1;
} else {
count = gf_list_count(*atts.lang);
for (j=0; j<count; j++) {
char *name = gf_list_get(*atts.lang, j);
if (!stricmp(name, lang) || strstr(lang, name)) {
glyph_ok = 1;
break;
}
}
}
}
if (atts.arabic_form) {
Bool first = (!prev_c || (prev_c==' ')) ? 1 : 0;
Bool last = ((i+1==len) || (glyph_buffer[i+1]==' ') ) ? 1 : 0;
if (!strcmp(*atts.arabic_form, "isolated")) {
if (!first || !last) glyph_ok = 0;
}
if (!strcmp(*atts.arabic_form, "initial")) {
if (!first) glyph_ok = 0;
}
if (!strcmp(*atts.arabic_form, "medial")) {
if (first || last) glyph_ok = 0;
}
if (!strcmp(*atts.arabic_form, "terminal")) {
if (!last) glyph_ok = 0;
}
}
if (glyph_ok) break;
}
/*perform glyph substitution*/
else if (st->uni_len>1) {
u32 j;
for (j=0; j<st->uni_len; j++) {
if (i+j>=len) break;
if (glyph_buffer[i+j] != st->unicode[j]) break;
}
if (j==st->uni_len)
break;
}
st = NULL;
}
child = child->next;
}
prev_c = glyph_buffer[i];
if (!st)
st = missing_glyph;
glyph_buffer[gl_idx] = st ? st->glyph.ID : 0;
if (st && st->uni_len>1) i++;
gl_idx++;
}
*io_glyph_buffer_size = len = gl_idx;
return GF_OK;
}
