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/*
* Copyright 2004 Computing Research Labs, New Mexico State University
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COMPUTING RESEARCH LAB OR NEW MEXICO STATE UNIVERSITY BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
* OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
* THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* Only compile this if the FreeType library is available.
*/
#ifdef HAVE_FREETYPE
#ifndef lint
#ifdef __GNUC__
static char rcsid[] __attribute__ ((unused)) = "$Id: bdfotf.c,v 1.11 2004/02/23 14:08:07 mleisher Exp $";
#else
static char rcsid[] = "$Id: bdfotf.c,v 1.11 2004/02/23 14:08:07 mleisher Exp $";
#endif
#endif
#include "bdfP.h"
#include FT_GLYPH_H
#include FT_SFNT_NAMES_H
#include FT_TRUETYPE_TABLES_H
#undef MAX
#define MAX(h, i) ((h) > (i) ? (h) : (i))
#undef MIN
#define MIN(l, o) ((l) < (o) ? (l) : (o))
/**************************************************************************
*
* Local variables.
*
**************************************************************************/
static char *platform_names[] = {
"Apple Unicode", "Macintosh", "ISO", "Microsoft", "Unknown"
};
static int nplatform_names =
sizeof(platform_names) / sizeof(platform_names[0]);
/*
* Mac encoding names used when creating the BDF XLFD font name and when
* selecting an encoding from a font.
*/
static char *mac_encodings[] = {
"MacRoman", "MacJapanese", "MacChinese", "MacKorean",
"MacArabic", "MacHebrew", "MacGreek", "MacRussian",
"MacRSymbol", "MacDevanagari", "MacGurmukhi", "MacGujarati",
"MacOriya", "MacBengali", "MacTamil", "MacTelugu",
"MacKannada", "MacMalayalam", "MacSinhalese", "MacBurmese",
"MacKhmer", "MacThai", "MacLaotian", "MacGeorgian",
"MacArmenian", "MacMaldivian", "MacTibetan", "MacMongolian",
"MacGeez", "MacSlavic", "MacVietnamese","MacSindhi",
"MacUninterp"
};
static int nmac_encodings = sizeof(mac_encodings) / sizeof(mac_encodings[0]);
/*
* ISO encoding names used when creating the BDF XLFD font name and when
* selecting an encoding from a font.
*/
static char *iso_encodings[] = {
"ASCII", "ISO10646", "ISO8859-1"
};
static int niso_encodings = sizeof(iso_encodings) / sizeof(iso_encodings[0]);
/*
* Microsoft encoding names used when creating the BDF XLFD font name and
* when selecting an encoding from a font.
*/
static char *ms_encodings[] = {
"Symbol", "ISO10646", "ShiftJIS", "GB2312.1980", "Big5",
"KSC5601.1987", "KSC5601.1992"
};
static int nms_encodings = sizeof(ms_encodings) / sizeof(ms_encodings[0]);
/**************************************************************************
*
* API.
*
**************************************************************************/
/*
* Routine to get the platform name from the platform ID.
*/
char *
#ifdef __STDC__
bdfotf_platform_name(short pid)
#else
bdfotf_platform_name(pid)
short pid;
#endif
{
return (pid < nplatform_names) ?
platform_names[pid] : platform_names[nplatform_names - 1];
}
/*
* Routine to get the encoding name from the platform and encoding IDs.
*/
char *
#ifdef __STDC__
bdfotf_encoding_name(short pid, short eid)
#else
bdfotf_encoding_name(pid, eid)
short pid, eid;
#endif
{
int nnames;
char **names;
switch (pid) {
case 0: return "ISO10646";
case 1:
nnames = nmac_encodings;
names = mac_encodings;
break;
case 2:
nnames = niso_encodings;
names = iso_encodings;
break;
case 3:
nnames = nms_encodings;
names = ms_encodings;
break;
default: return "Unknown";
}
return (eid < nnames) ? names[eid] : "Unknown";
}
/*
* A generic routine to get a name from the TT name table. This routine
* always looks for English language names and checks three possibilities:
* 1. English names with the MS Unicode encoding ID.
* 2. English names with the MS unknown encoding ID.
* 3. English names with the Apple Unicode encoding ID.
*
* The particular name ID mut be provided (e.g. nameID = 0 for copyright
* string, nameID = 6 for Postscript name, nameID = 1 for typeface name.
*
* If the `dash_to_space' flag is set, all dashes (-) in the name will be
* replaced with spaces.
*
* Returns the number of bytes added.
*/
int
#ifdef __STDC__
bdfotf_get_english_string(FT_Face face, int nameID, int dash_to_space,
char *name)
#else
bdfotf_get_english_string(face, nameID, dash_to_space, name)
FT_Face face;
int nameID, dash_to_space;
char *name;
#endif
{
int j, encid;
FT_UInt i, nrec;
FT_SfntName sfntName;
char *s;
unsigned short slen;
nrec = FT_Get_Sfnt_Name_Count(face);
for (encid = 1, j = 0; j < 2; j++, encid--) {
/*
* Locate one of the MS English font names.
*/
for (i = 0; i < nrec; i++) {
FT_Get_Sfnt_Name(face, i, &sfntName);
if (sfntName.platform_id == 3 &&
sfntName.encoding_id == encid &&
sfntName.name_id == nameID &&
(sfntName.language_id == 0x0409 ||
sfntName.language_id == 0x0809 ||
sfntName.language_id == 0x0c09 ||
sfntName.language_id == 0x1009 ||
sfntName.language_id == 0x1409 ||
sfntName.language_id == 0x1809)) {
s = sfntName.string;
slen = sfntName.string_len;
break;
}
}
if (i < nrec) {
/*
* Found one of the MS English font names. The name is by
* definition encoded in Unicode, so copy every second byte into
* the `name' parameter, assuming there is enough space.
*/
for (i = 1; i < slen; i += 2) {
if (dash_to_space)
*name++ = (s[i] != '-') ? s[i] : ' ';
else if (s[i] == '\r' || s[i] == '\n') {
if (s[i] == '\r' && i + 2 < slen && s[i + 2] == '\n')
i += 2;
*name++ = ' ';
*name++ = ' ';
} else
*name++ = s[i];
}
*name = 0;
return (slen >> 1);
}
}
/*
* No MS English name found, attempt to find an Apple Unicode English
* name.
*/
for (i = 0; i < nrec; i++) {
FT_Get_Sfnt_Name(face, i, &sfntName);
if (sfntName.platform_id == 0 && sfntName.language_id == 0 &&
sfntName.name_id == nameID) {
s = sfntName.string;
slen = sfntName.string_len;
break;
}
}
if (i < nrec) {
/*
* Found the Apple Unicode English name. The name is by definition
* encoded in Unicode, so copy every second byte into the `name'
* parameter, assuming there is enough space.
*/
for (i = 1; i < slen; i += 2) {
if (dash_to_space)
*name++ = (s[i] != '-') ? s[i] : ' ';
else if (s[i] == '\r' || s[i] == '\n') {
if (s[i] == '\r' && i + 2 < slen && s[i + 2] == '\n')
i += 2;
*name++ = ' ';
*name++ = ' ';
} else
*name++ = s[i];
}
*name = 0;
return (slen >> 1);
}
return 0;
}
static int
#ifdef __STDC__
_bdfotf_generate(FT_Face face, int nocmap, bdf_options_t *opts,
bdf_callback_t callback, void *data, bdf_font_t *fp)
#else
_bdfotf_generate(face, nocmap, opts, callback, data, fp)
FT_Face face;
int nocmap;
bdf_options_t *opts;
bdf_callback_t callback;
void *data;
bdf_font_t *fp;
#endif
{
int ismono;
long awidth, code, idx;
short maxrb, maxlb, minlb, y, x;
short x_off, y_off, maxas, maxds;
unsigned short upm, bpr, wd, ht, sx, ex, sy, ey;
unsigned char *bmap;
bdf_glyph_t *gp;
double swscale;
bdf_callback_struct_t cb;
bdf_property_t prop;
FT_Size_Metrics imetrics;
TT_HoriHeader *horizontal = FT_Get_Sfnt_Table(face, ft_sfnt_hhea);
/*
* Set the instance resolution and point size.
*/
FT_Set_Char_Size(face, 0, opts->point_size * 64,
opts->resolution_x, opts->resolution_y);
imetrics = face->size->metrics;
/*
* Set up the initialization callback.
*/
if (callback != 0) {
cb.reason = BDF_LOAD_START;
cb.current = 0;
cb.total = face->num_glyphs;
(*callback)(&cb, data);
}
/*
* Get the units per em value.
*/
upm = face->units_per_EM;
ismono = 1;
wd = 0xffff;
awidth = 0;
maxrb = maxlb = maxas = maxds = 0;
minlb = 32767;
/*
* Calculate the SWIDTH scaling factor.
*/
swscale = ((double) opts->resolution_y) * ((double) opts->point_size);
for (code = fp->glyphs_used = 0; code < 0xffff; code++) {
if (nocmap) {
/*
* No cmap is being used, so do each index in turn.
*/
if (code >= face->num_glyphs)
break;
idx = code;
} else
idx = FT_Get_Char_Index(face, code);
if (idx <= 0 ||
FT_Load_Glyph(face, idx, opts->otf_flags))
continue;
if (FT_Render_Glyph(face->glyph, FT_RENDER_MODE_MONO))
continue;
/*
* Increase the amount of storage by 128 every time.
*/
if (fp->glyphs_used == fp->glyphs_size) {
fp->glyphs = (bdf_glyph_t *)
realloc((char *) fp->glyphs,
sizeof(bdf_glyph_t) * (fp->glyphs_size + 128));
gp = fp->glyphs + fp->glyphs_size;
(void) memset((char *) gp, 0, sizeof(bdf_glyph_t) << 7);
fp->glyphs_size += 128;
}
/*
* Point at the next glyph.
*/
gp = fp->glyphs + fp->glyphs_used++;
gp->encoding = code;
gp->dwidth = face->glyph->metrics.horiAdvance >> 6;
gp->swidth = (unsigned short)
(((double) gp->dwidth) * 72000.0) / swscale;
/*
* Determine the actual bounding box of the glyph bitmap. Do not
* forget that the glyph is rendered upside down!
*/
sx = sy = 0xffff;
ex = ey = 0;
bmap = face->glyph->bitmap.buffer;
for (y = 0; y < face->glyph->bitmap.rows; y++) {
for (x = 0; x < face->glyph->bitmap.width; x++) {
if (bmap[x >> 3] & (0x80 >> (x & 7))) {
if (x < sx) sx = x;
if (x > ex) ex = x;
if (y < sy) sy = y;
if (y > ey) ey = y;
}
}
bmap += face->glyph->bitmap.pitch;
}
/*
* If the glyph is actually an empty bitmap, set the size to 0 all
* around.
*/
if (sx == 0xffff && sy == 0xffff && ex == 0 && ey == 0)
sx = ex = sy = ey = 0;
else {
/*
* Adjust the end points.
*/
ex++;
ey++;
}
/*
* Test to see if the font is going to be monowidth or not by
* comparing the current glyph width against the last one.
*/
if (ismono && (ex - sx) + 1 != wd)
ismono = 0;
/*
* Set the initial metrics.
*/
wd = ex - sx;
ht = ey - sy;
x_off = sx + face->glyph->bitmap_left;
y_off = sy + face->glyph->bitmap_top - face->glyph->bitmap.rows;
/*
* Adjust the overall bounding box.
*/
maxas = MAX(maxas, ht + y_off);
maxds = MAX(maxds, -y_off);
maxrb = MAX(maxrb, wd + x_off);
minlb = MIN(minlb, x_off);
maxlb = MAX(maxlb, x_off);
/*
* Accumulate the average width value.
*/
awidth += wd;
/*
* Set the glyph metrics.
*/
gp->bbx.width = wd;
gp->bbx.height = ht;
gp->bbx.x_offset = x_off;
gp->bbx.y_offset = y_off;
gp->bbx.ascent = ht + y_off;
gp->bbx.descent = -y_off;
/*
* Allocate the bitmap for the glyph.
*/
bpr = (wd + 7) >> 3;
gp->bytes = bpr * ht;
gp->bitmap = (unsigned char *) malloc(gp->bytes);
(void) memset((char *) gp->bitmap, 0, gp->bytes);
/*
* Shift the bits into the glyph bitmap.
*/
bmap = face->glyph->bitmap.buffer + sy * face->glyph->bitmap.pitch;
for (y = 0; y < ey - sy; y++) {
for (x = 0; x < ex - sx; x++) {
if (bmap[(x+sx) >> 3] & (0x80 >> ((x+sx) & 7)))
gp->bitmap[(y * bpr) + (x >> 3)] |= (0x80 >> (x & 7));
}
bmap += face->glyph->bitmap.pitch;
}
/*
* Call the callback if it was provided.
*/
if (callback != 0) {
cb.reason = BDF_LOADING;
cb.current = fp->glyphs_used;
cb.total = face->num_glyphs;
(*callback)(&cb, data);
}
}
/*
* Calculate the font average width.
*/
awidth =
(long) ((((double) awidth / (double) fp->glyphs_used) + 0.5) * 10.0);
/*
* Set the font bounding box.
*/
fp->bbx.width = maxrb - minlb;
fp->bbx.height = maxas + maxds;
fp->bbx.x_offset = minlb;
fp->bbx.y_offset = -maxds;
fp->bbx.ascent = maxas;
fp->bbx.descent = maxds;
/*
* Set the font ascent and descent.
*/
fp->font_ascent =
(horizontal->Ascender * imetrics.y_ppem) / upm;
fp->font_descent =
-((horizontal->Descender * imetrics.y_ppem) / upm);
/*
* Determine if the font is monowidth.
*/
if (ismono) {
fp->spacing = BDF_MONOWIDTH;
fp->monowidth = fp->bbx.width;
}
/*
* Add the properties needed for the XLFD name.
*/
prop.name = "POINT_SIZE";
prop.format = BDF_INTEGER;
prop.value.int32 = fp->point_size * 10;
bdf_add_font_property(fp, &prop);
prop.name = "PIXEL_SIZE";
prop.format = BDF_INTEGER;
prop.value.int32 = (long)
((((double) (fp->point_size * 10) *
(double) fp->resolution_y) / 722.7) + 0.5);
bdf_add_font_property(fp, &prop);
prop.name = "RESOLUTION_X";
prop.format = BDF_CARDINAL;
prop.value.card32 = (unsigned long) fp->resolution_x;
bdf_add_font_property(fp, &prop);
prop.name = "RESOLUTION_Y";
prop.format = BDF_CARDINAL;
prop.value.card32 = (unsigned long) fp->resolution_y;
bdf_add_font_property(fp, &prop);
prop.name = "FONT_ASCENT";
prop.format = BDF_INTEGER;
prop.value.int32 = fp->font_ascent;
bdf_add_font_property(fp, &prop);
prop.name = "FONT_DESCENT";
prop.format = BDF_INTEGER;
prop.value.int32 = fp->font_descent;
bdf_add_font_property(fp, &prop);
prop.name = "AVERAGE_WIDTH";
prop.format = BDF_INTEGER;
prop.value.int32 = awidth;
bdf_add_font_property(fp, &prop);
prop.name = "SPACING";
prop.format = BDF_ATOM;
prop.value.atom = "P";
switch (fp->spacing) {
case BDF_PROPORTIONAL: prop.value.atom = "P"; break;
case BDF_MONOWIDTH: prop.value.atom = "M"; break;
case BDF_CHARCELL: prop.value.atom = "C"; break;
}
bdf_add_font_property(fp, &prop);
return 1;
}
int
#ifdef __STDC__
bdfotf_load_font(FT_Face face, short pid, short eid, bdf_options_t *opts,
bdf_callback_t callback, void *data, bdf_font_t **font)
#else
bdfotf_load_font(face, pid, eid, opts, callback, data, font)
FT_Face face;
short pid, eid;
bdf_options_t *opts;
bdf_callback_t callback;
void *data;
bdf_font_t **font;
#endif
{
int i, nocmap, res, slen;
bdf_font_t *fp;
char *np, str[256];
bdf_property_t prop;
bdf_callback_struct_t cb;
TT_OS2 *os2 = FT_Get_Sfnt_Table(face, ft_sfnt_os2);
/*
* First get the requested cmap from the font.
*/
for (nocmap = i = 0; i < face->num_charmaps; i++) {
if (face->charmaps[i]->platform_id == pid &&
face->charmaps[i]->encoding_id == eid)
break;
}
/*
* If the requested cmap was not found, attempt to fall back on the
* Microsoft Unicode cmap.
*/
if (i == face->num_charmaps) {
for (i = 0; i < face->num_charmaps; i++) {
if (face->charmaps[i]->platform_id == 3 &&
face->charmaps[i]->encoding_id == 1)
break;
}
if (i == face->num_charmaps) {
/*
* No cmap was found.
*/
nocmap = 1;
pid = eid = -1;
} else {
/*
* Found the Microsoft Unicode cmap.
*/
pid = 3;
eid = 1;
FT_Set_Charmap(face, face->charmaps[i]);
}
} else
FT_Set_Charmap(face, face->charmaps[i]);
/*
* Create the font.
*/
*font = fp = (bdf_font_t *) malloc(sizeof(bdf_font_t));
(void) memset((char *) fp, 0, sizeof(bdf_font_t));
/*
* Do some initializations by defaulting to proportional spacing and
* allocate at least the reported number of glyphs so reallocations will
* be minimal.
*/
fp->bpp = 1;
fp->default_glyph = -1;
fp->spacing = BDF_PROPORTIONAL;
fp->glyphs_size = face->num_glyphs;
fp->glyphs = (bdf_glyph_t *)
malloc(sizeof(bdf_glyph_t) * face->num_glyphs);
(void) memset((char *) fp->glyphs, 0,
sizeof(bdf_glyph_t) * face->num_glyphs);
/*
* Set the metrics.
*/
fp->point_size = opts->point_size;
fp->resolution_x = opts->resolution_x;
fp->resolution_y = opts->resolution_y;
/*
* Actually generate the font.
*/
res = _bdfotf_generate(face, nocmap, opts, callback, data, fp);
/*
* If the number of glyphs loaded is less than the reported number of
* glyphs, force a callback if one was provided.
*/
if (callback != 0 && fp->glyphs_used < face->num_glyphs) {
cb.reason = BDF_LOADING;
cb.total = cb.current = face->num_glyphs;
(*callback)(&cb, data);
}
/*
* If the font did not load successfully, free up the font.
*/
if (!res) {
bdf_free_font(fp);
*font = 0;
} else {
/*
* Add other sundry properties so the XLFD name can be generated.
*/
prop.name = "FOUNDRY";
prop.format = BDF_ATOM;
prop.value.atom = "FreeType";
bdf_add_font_property(fp, &prop);
/*
* Get the typeface name.
*/
slen = bdfotf_get_english_string(face, BDFOTF_FAMILY_STRING, 1, str);
prop.name = "FAMILY_NAME";
prop.format = BDF_ATOM;
if (slen > 0)
prop.value.atom = str;
else
prop.value.atom = "Unknown";
bdf_add_font_property(fp, &prop);
/*
* Add the CHARSET_REGISTRY and CHARSET_ENCODING properties.
*/
np = bdfotf_encoding_name(pid, eid);
if (strcmp(np, "ISO8859-1") == 0) {
prop.name = "CHARSET_REGISTRY";
prop.format = BDF_ATOM;
prop.value.atom = "ISO8859";
bdf_add_font_property(fp, &prop);
prop.name = "CHARSET_ENCODING";
prop.format = BDF_ATOM;
prop.value.atom = "1";
bdf_add_font_property(fp, &prop);
} else if (strcmp(np, "ISO10646") == 0) {
prop.name = "CHARSET_REGISTRY";
prop.format = BDF_ATOM;
prop.value.atom = np;
bdf_add_font_property(fp, &prop);
prop.name = "CHARSET_ENCODING";
prop.format = BDF_ATOM;
prop.value.atom = "1";
bdf_add_font_property(fp, &prop);
} else {
prop.name = "CHARSET_REGISTRY";
prop.format = BDF_ATOM;
prop.value.atom = np;
bdf_add_font_property(fp, &prop);
prop.name = "CHARSET_ENCODING";
prop.format = BDF_ATOM;
prop.value.atom = "0";
bdf_add_font_property(fp, &prop);
}
/*
* Determine the weight name.
*/
prop.name = "WEIGHT_NAME";
prop.format = BDF_ATOM;
slen = bdfotf_get_english_string(face, BDFOTF_SUBFAMILY_STRING,
1, str);
if (strcmp(str, "Regular") == 0)
prop.value.atom = "Medium";
else if (os2->fsSelection & 0x20)
prop.value.atom = "Bold";
else if (slen > 0)
prop.value.atom = str;
else
prop.value.atom = "Medium";
bdf_add_font_property(fp, &prop);
/*
* Determine the slant name.
*/
prop.name = "SLANT";
prop.format = BDF_ATOM;
if (os2->fsSelection & 0x01)
prop.value.atom = "I";
else
prop.value.atom = "R";
bdf_add_font_property(fp, &prop);
/*
* Add the default SETWIDTH_NAME.
*/
prop.name = "SETWIDTH_NAME";
prop.format = BDF_ATOM;
prop.value.atom = "Normal";
bdf_add_font_property(fp, &prop);
/*
* Create the XLFD font name for the font.
*/
fp->name = bdf_make_xlfd_name(fp, 0, 0);
/*
* Add the COPYRIGHT notice.
*/
slen = bdfotf_get_english_string(face, BDFOTF_COPYRIGHT_STRING,
0, str);
if (slen > 0) {
prop.name = "COPYRIGHT";
prop.format = BDF_ATOM;
prop.value.atom = str;
bdf_add_font_property(fp, &prop);
}
/*
* Add the special _TTF_PSNAME atom with the font Postscript name.
*/
slen = bdfotf_get_english_string(face, BDFOTF_POSTSCRIPT_STRING,
0, str);
if (slen > 0) {
prop.name = "_TTF_PSNAME";
prop.format = BDF_ATOM;
prop.value.atom = str;
bdf_add_font_property(fp, &prop);
}
/*
* Add a message indicating the font was converted.
*/
_bdf_add_comment(fp, "Font converted from OTF to BDF.", 31);
_bdf_add_acmsg(fp, "Font converted from OTF to BDF.", 31);
/*
* Finally, mark the font as being modified.
*/
fp->modified = 1;
}
return res;
}
#endif /* HAVE_FREETYPE */
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