static int
checkExtraEncoding(FT_Face face, char *encoding_name, int found)
{
int c;
if(strcasecmp(encoding_name, "iso10646-1") == 0) {
if(doISO10646_1_encoding && find_cmap(FONT_ENCODING_UNICODE, -1, -1, face)) {
int found = 0;
/* Export as Unicode if there are at least 15 BMP
characters that are not a space or ignored. */
for(c = 0x21; c < 0x10000; c++) {
if(CODE_IGNORED(c))
continue;
if(FT_Get_Char_Index(face, c) > 0)
found++;
if(found >= 15)
return 1;
}
return 0;
} else
return 0;
} else if(strcasecmp(encoding_name, "microsoft-symbol") == 0) {
if(find_cmap(FONT_ENCODING_TRUETYPE,
TT_PLATFORM_MICROSOFT, TT_MS_ID_SYMBOL_CS,
face))
return 1;
else
return 0;
} else if(strcasecmp(encoding_name, "adobe-fontspecific") == 0) {
if(!found) {
if(FT_Has_PS_Glyph_Names(face))
return 1;
else
return 0;
} else
return 0;
} else {
fprintf(stderr, "Unknown extra encoding %s\n", encoding_name);
return 0;
}
}
int
FTPickMapping(char *xlfd, int length, char *filename, FT_Face face,
FTMappingPtr tm)
{
FontEncPtr encoding;
FontMapPtr mapping;
FT_CharMap cmap;
int ftrc;
int symbol = 0;
const char *enc, *reg;
char *encoding_name = 0;
char buf[20];
if(xlfd)
encoding_name = FontEncFromXLFD(xlfd, length);
if(!encoding_name)
encoding_name = "iso8859-1";
symbol = FTEncFontSpecific(encoding_name);
#if XFONT_BDFFORMAT
ftrc = FT_Get_BDF_Charset_ID(face, &enc, ®);
#else
ftrc = -1;
#endif
if(ftrc == 0) {
/* Disable reencoding for non-Unicode fonts. This will
currently only work for BDFs. */
if(strlen(enc) + strlen(reg) > 18)
goto native;
strcpy(buf, enc);
strcat(buf, "-");
strcat(buf, reg);
ErrorF("%s %s\n", buf, encoding_name);
if(strcasecmp(buf, "iso10646-1") != 0) {
if(strcasecmp(buf, encoding_name) == 0)
goto native;
return BadFontFormat;
}
} else if(symbol) {
ftrc = FT_Select_Charmap(face, ft_encoding_adobe_custom);
if(ftrc == 0)
goto native;
}
encoding = FontEncFind(encoding_name, filename);
if(symbol && encoding == NULL)
encoding = FontEncFind("microsoft-symbol", filename);
if(encoding == NULL) {
ErrorF("FreeType: couldn't find encoding '%s' for '%s'\n",
encoding_name, filename);
return BadFontName;
}
if(FT_Has_PS_Glyph_Names(face)) {
for(mapping = encoding->mappings; mapping; mapping = mapping->next) {
if(mapping->type == FONT_ENCODING_POSTSCRIPT) {
tm->named = 1;
tm->base = 0;
tm->mapping = mapping;
return Successful;
}
}
}
for(mapping = encoding->mappings; mapping; mapping = mapping->next) {
if(find_cmap(mapping->type, mapping->pid, mapping->eid, face,
&cmap)) {
tm->named = 0;
tm->cmap = cmap;
if(symbol) {
/* deal with an undocumented ``feature'' of the
Microsft-Symbol cmap */
TT_OS2 *os2;
os2 = FT_Get_Sfnt_Table(face, ft_sfnt_os2);
if(os2)
tm->base = os2->usFirstCharIndex - 0x20;
else
tm->base = 0;
} else
tm->base = 0;
tm->mapping = mapping;
return Successful;
}
}
return BadFontFormat;
native:
tm->named = 0;
tm->cmap = face->charmap;
tm->base = 0;
tm->mapping = NULL;
return Successful;
}
static int
checkEncoding(FT_Face face, char *encoding_name)
{
FontEncPtr encoding;
FontMapPtr mapping;
int i, j, c, koi8;
char *n;
encoding = FontEncFind(encoding_name, NULL);
if(!encoding)
return 0;
/* An encoding is ``small'' if one of the following is true:
- it is linear and has no more than 256 codepoints; or
- it is a matrix encoding and has no more than one column.
For small encodings using Unicode indices, we require perfect
coverage except for CODE_IGNORED and KOI-8 IBM-PC compatibility.
For large encodings, we require coverage up to bigEncodingFuzz.
For encodings using PS names (currently Adobe Standard and
Adobe Symbol only), we require perfect coverage. */
if(FT_Has_PS_Glyph_Names(face)) {
for(mapping = encoding->mappings; mapping; mapping = mapping->next) {
if(mapping->type == FONT_ENCODING_POSTSCRIPT) {
if(encoding->row_size > 0) {
for(i = encoding->first; i < encoding->size; i++) {
for(j = encoding->first_col;
j < encoding->row_size;
j++) {
n = FontEncName((i<<8) | j, mapping);
if(n && FT_Get_Name_Index(face, n) == 0) {
return 0;
}
}
}
return 1;
} else {
for(i = encoding->first; i < encoding->size; i++) {
n = FontEncName(i, mapping);
if(n && FT_Get_Name_Index(face, n) == 0) {
return 0;
}
}
return 1;
}
}
}
}
for(mapping = encoding->mappings; mapping; mapping = mapping->next) {
if(find_cmap(mapping->type, mapping->pid, mapping->eid, face)) {
int total = 0, failed = 0;
if(encoding->row_size > 0) {
int estimate =
(encoding->size - encoding->first) *
(encoding->row_size - encoding->first_col);
for(i = encoding->first; i < encoding->size; i++) {
for(j = encoding->first_col;
j < encoding->row_size;
j++) {
c = FontEncRecode((i<<8) | j, mapping);
if(CODE_IGNORED(c)) {
continue;
} else {
if(FT_Get_Char_Index(face, c) == 0) {
failed++;
}
total++;
if((encoding->size <= 1 && failed > 0) ||
((float)failed >= bigEncodingFuzz * estimate)) {
return 0;
}
}
}
}
if((float)failed >= total * bigEncodingFuzz)
return 0;
else
return 1;
} else {
int estimate = encoding->size - encoding->first;
/* For the KOI8 encodings, we ignore the lack of
linedrawing and pseudo-math characters */
if(strncmp(encoding->name, "koi8-", 5) == 0)
koi8 = 1;
else
koi8 = 0;
for(i = encoding->first; i < encoding->size; i++) {
c = FontEncRecode(i, mapping);
if(CODE_IGNORED(c) ||
(koi8 && ((c >= 0x2200 && c < 0x2600) || c == 0x00b2))) {
continue;
} else {
if(FT_Get_Char_Index(face, c) == 0) {
failed++;
}
total++;
if((encoding->size <= 256 && failed > 0) ||
((float)failed >= bigEncodingFuzz * estimate)) {
return 0;
}
}
}
if((float)failed >= total * bigEncodingFuzz)
return 0;
else
return 1;
}
}
}
return 0;
}