static int ShapeParagraphFriBidi( filter_t *p_filter, paragraph_t *p_paragraph )
{
if( p_paragraph->i_size <= 0 )
{
msg_Err( p_filter,
"ShapeParagraphFriBidi() invalid parameters. Paragraph size: %d",
p_paragraph->i_size );
return VLC_EGENERIC;
}
FriBidiJoiningType *p_joining_types =
malloc( p_paragraph->i_size * sizeof( *p_joining_types ) );
if( !p_joining_types )
return VLC_ENOMEM;
fribidi_get_joining_types( p_paragraph->p_code_points,
p_paragraph->i_size, p_joining_types );
fribidi_join_arabic( p_paragraph->p_types, p_paragraph->i_size,
p_paragraph->p_levels, p_joining_types );
fribidi_shape( FRIBIDI_FLAGS_DEFAULT | FRIBIDI_FLAGS_ARABIC,
p_paragraph->p_levels,
p_paragraph->i_size,
p_joining_types,
p_paragraph->p_code_points );
free( p_joining_types );
return VLC_SUCCESS;
}
bool GlyphString::shapeFriBidi(bool removeInvisibleCharacters)
{
if (mState != Analyzed)
return false;
FriBidiJoiningType *joiningTypes = new FriBidiJoiningType[mSize];
fribidi_get_joining_types(mCodePoints, mSize, joiningTypes);
fribidi_join_arabic(mTypes, mSize, mLevels, joiningTypes);
fribidi_shape(FRIBIDI_FLAGS_DEFAULT | FRIBIDI_FLAGS_ARABIC,
mLevels, mSize, joiningTypes, mCodePoints);
delete[] joiningTypes;
loadGlyphImages();
if (removeInvisibleCharacters) {
for (int i = 0; i < mSize; ++i) {
if (mCodePoints[i] == 0xfeff
|| mCodePoints[i] == 0x061c
|| (mCodePoints[i] >= 0x202a && mCodePoints[i] <= 0x202e)
|| (mCodePoints[i] >= 0x2060 && mCodePoints[i] <= 0x2069)
|| (mCodePoints[i] >= 0x200b && mCodePoints[i] <= 0x200f))
clearGlyph(i);
}
}
mState = Shaped;
return true;
}
/**
* @internal
* Shapes the string ustr according to the bidi properties.
*
* @param str The string to shape
* @param bidi_props the bidi props to shaped according.
* @param start the start of the string to shape (offset in bidi_props)
* @param len the length of th string.
* @return #EINA_TRUE on success, #EINA_FALSE otherwise.
*/
EAPI Eina_Bool
evas_bidi_shape_string(Eina_Unicode *eina_ustr, const Evas_BiDi_Paragraph_Props *bidi_props, size_t start, size_t len)
{
FriBidiChar *ustr, *base_ustr = NULL;
if (!bidi_props)
return EINA_FALSE;
/* The size of fribidichar is different than eina_unicode, convert */
#ifdef EVAS_FRIBIDI_EINA_UNICODE_UNEQUAL
base_ustr = ustr = calloc(len + 1, sizeof(FriBidiChar));
ustr = _evas_bidi_unicode_to_fribidichar(ustr, eina_ustr);
#else
(void) base_ustr;
ustr = (FriBidiChar *) eina_ustr;
#endif
EvasBiDiJoiningType *join_types = NULL;
join_types = (EvasBiDiJoiningType *) malloc(sizeof(EvasBiDiJoiningType) * len);
if (!join_types)
{
#ifdef EVAS_FRIBIDI_EINA_UNICODE_UNEQUAL
if (base_ustr) free(base_ustr);
#endif
return EINA_FALSE;
}
fribidi_get_joining_types(ustr, len, join_types);
fribidi_join_arabic(bidi_props->char_types + start, len,
bidi_props->embedding_levels + start, join_types);
/* Actually modify the string */
fribidi_shape(FRIBIDI_FLAGS_DEFAULT | FRIBIDI_FLAGS_ARABIC,
bidi_props->embedding_levels + start, len, join_types, ustr);
if (join_types) free(join_types);
/* Convert back */
#ifdef EVAS_FRIBIDI_EINA_UNICODE_UNEQUAL
_evas_bidi_fribidichar_to_unicode(eina_ustr, ustr);
if (base_ustr) free(base_ustr);
#endif
return EINA_TRUE;
}
static int shape_text(AVFilterContext *ctx)
{
DrawTextContext *s = ctx->priv;
uint8_t *tmp;
int ret = AVERROR(ENOMEM);
static const FriBidiFlags flags = FRIBIDI_FLAGS_DEFAULT |
FRIBIDI_FLAGS_ARABIC;
FriBidiChar *unicodestr = NULL;
FriBidiStrIndex len;
FriBidiParType direction = FRIBIDI_PAR_LTR;
FriBidiStrIndex line_start = 0;
FriBidiStrIndex line_end = 0;
FriBidiLevel *embedding_levels = NULL;
FriBidiArabicProp *ar_props = NULL;
FriBidiCharType *bidi_types = NULL;
FriBidiStrIndex i,j;
len = strlen(s->text);
if (!(unicodestr = av_malloc_array(len, sizeof(*unicodestr)))) {
goto out;
}
len = fribidi_charset_to_unicode(FRIBIDI_CHAR_SET_UTF8,
s->text, len, unicodestr);
bidi_types = av_malloc_array(len, sizeof(*bidi_types));
if (!bidi_types) {
goto out;
}
fribidi_get_bidi_types(unicodestr, len, bidi_types);
embedding_levels = av_malloc_array(len, sizeof(*embedding_levels));
if (!embedding_levels) {
goto out;
}
if (!fribidi_get_par_embedding_levels(bidi_types, len, &direction,
embedding_levels)) {
goto out;
}
ar_props = av_malloc_array(len, sizeof(*ar_props));
if (!ar_props) {
goto out;
}
fribidi_get_joining_types(unicodestr, len, ar_props);
fribidi_join_arabic(bidi_types, len, embedding_levels, ar_props);
fribidi_shape(flags, embedding_levels, len, ar_props, unicodestr);
for (line_end = 0, line_start = 0; line_end < len; line_end++) {
if (is_newline(unicodestr[line_end]) || line_end == len - 1) {
if (!fribidi_reorder_line(flags, bidi_types,
line_end - line_start + 1, line_start,
direction, embedding_levels, unicodestr,
NULL)) {
goto out;
}
line_start = line_end + 1;
}
}
/* Remove zero-width fill chars put in by libfribidi */
for (i = 0, j = 0; i < len; i++)
if (unicodestr[i] != FRIBIDI_CHAR_FILL)
unicodestr[j++] = unicodestr[i];
len = j;
if (!(tmp = av_realloc(s->text, (len * 4 + 1) * sizeof(*s->text)))) {
/* Use len * 4, as a unicode character can be up to 4 bytes in UTF-8 */
goto out;
}
s->text = tmp;
len = fribidi_unicode_to_charset(FRIBIDI_CHAR_SET_UTF8,
unicodestr, len, s->text);
ret = 0;
out:
av_free(unicodestr);
av_free(embedding_levels);
av_free(ar_props);
av_free(bidi_types);
return ret;
}
