unsigned
FTRemap(FT_Face face, FTMappingPtr tm, unsigned code)
{
unsigned index;
char *name;
unsigned glyph_index;
if(tm->mapping) {
if(tm->named) {
name = FontEncName(code, tm->mapping);
if(!name)
return 0;
glyph_index = FT_Get_Name_Index(face, name);
return glyph_index;
} else {
index = FontEncRecode(code, tm->mapping) + tm->base;
FT_Set_Charmap(face, tm->cmap);
glyph_index = FT_Get_Char_Index(face, index);
return glyph_index;
}
} else {
if(code < 0x100) {
index = code;
FT_Set_Charmap(face, tm->cmap);
glyph_index = FT_Get_Char_Index(face, index);
return glyph_index;
} else
return 0;
}
}
char *
font_encoding_name(unsigned code,
FontEncPtr encoding, FontMapPtr mapping)
{
if(encoding != mapping->encoding) {
ErrorF("Inconsistent mapping/encoding\n");
return 0;
}
return FontEncName(code, mapping);
}
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;
}
