long
TTFsearch_PS_name(const char *name)
{
unsigned int i;
char buff[128];
for (i = 0; i < face->num_glyphs; i++)
{
FT_Get_Glyph_Name(face, i, buff, 128);
if (strcmp(name, buff) == 0)
break;
}
if (i == face->num_glyphs)
return -1L;
else
return (long)i;
}
void init( std::string unicode_s )
{
face = file.face;
codepoint = strtol( unicode_s.c_str() , NULL, 0 );
// Load the Glyph into the face's Glyph Slot + print details
FT_UInt glyph_index = FT_Get_Char_Index( face, codepoint );
debug << "<!--\nUnicode requested: " << unicode_s;
debug << " (decimal: " << codepoint << " hex: 0x"
<< std::hex << codepoint << std::dec << ")";
debug << "\nGlyph index for unicode: " << glyph_index;
error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE );
debug << "\nLoad Glyph into Face's glyph slot. error code: " << error;
slot = face->glyph;
ftoutline = slot->outline;
char glyph_name[1024];
FT_Get_Glyph_Name( face, glyph_index, glyph_name, 1024 );
debug << "\nGlyph Name: " << glyph_name;
debug << "\nGlyph Width: " << gm.width
<< " Height: " << gm.height
<< " Hor. Advance: " << gm.horiAdvance
<< " Vert. Advance: " << gm.vertAdvance;
gm = slot->metrics;
// Print outline details, taken from the glyph in the slot.
debug << "\nNum points: " << ftoutline.n_points;
debug << "\nNum contours: " << ftoutline.n_contours;
debug << "\nContour endpoint index values:";
for ( int i = 0 ; i < ftoutline.n_contours ; i++ ) debug << " " << ftoutline.contours[i];
debug << "\n-->\n";
// Invert y coordinates (SVG = neg at top, TType = neg at bottom)
ftpoints = ftoutline.points;
for ( int i = 0 ; i < ftoutline.n_points ; i++ )
ftpoints[i].y *= -1;
bbheight = face->bbox.yMax - face->bbox.yMin;
bbwidth = face->bbox.xMax - face->bbox.xMin;
tags = ftoutline.tags;
contours = ftoutline.contours;
std::cout << debug.str();
}
static pdf_font_desc *
pdf_load_simple_font(pdf_document *xref, pdf_obj *dict)
{
pdf_obj *descriptor;
pdf_obj *encoding;
pdf_obj *widths;
unsigned short *etable = NULL;
pdf_font_desc *fontdesc = NULL;
char *subtype;
FT_Face face;
FT_CharMap cmap;
int symbolic;
int kind;
char *basefont;
char *estrings[256];
char ebuffer[256][32];
int i, k, n;
int fterr;
fz_context *ctx = xref->ctx;
fz_var(fontdesc);
fz_var(etable);
basefont = pdf_to_name(pdf_dict_gets(dict, "BaseFont"));
/* Load font file */
fz_try(ctx)
{
fontdesc = pdf_new_font_desc(ctx);
descriptor = pdf_dict_gets(dict, "FontDescriptor");
if (descriptor)
pdf_load_font_descriptor(fontdesc, xref, descriptor, NULL, basefont);
else
pdf_load_builtin_font(ctx, fontdesc, basefont);
/* Some chinese documents mistakenly consider WinAnsiEncoding to be codepage 936 */
if (descriptor && pdf_is_string(pdf_dict_gets(descriptor, "FontName")) &&
!pdf_dict_gets(dict, "ToUnicode") &&
!strcmp(pdf_to_name(pdf_dict_gets(dict, "Encoding")), "WinAnsiEncoding") &&
pdf_to_int(pdf_dict_gets(descriptor, "Flags")) == 4)
{
char *cp936fonts[] = {
"\xCB\xCE\xCC\xE5", "SimSun,Regular",
"\xBA\xDA\xCC\xE5", "SimHei,Regular",
"\xBF\xAC\xCC\xE5_GB2312", "SimKai,Regular",
"\xB7\xC2\xCB\xCE_GB2312", "SimFang,Regular",
"\xC1\xA5\xCA\xE9", "SimLi,Regular",
NULL
};
for (i = 0; cp936fonts[i]; i += 2)
if (!strcmp(basefont, cp936fonts[i]))
break;
if (cp936fonts[i])
{
fz_warn(ctx, "workaround for S22PDF lying about chinese font encodings");
pdf_drop_font(ctx, fontdesc);
fontdesc = pdf_new_font_desc(ctx);
pdf_load_font_descriptor(fontdesc, xref, descriptor, "Adobe-GB1", cp936fonts[i+1]);
fontdesc->encoding = pdf_load_system_cmap(ctx, "GBK-EUC-H");
fontdesc->to_unicode = pdf_load_system_cmap(ctx, "Adobe-GB1-UCS2");
fontdesc->to_ttf_cmap = pdf_load_system_cmap(ctx, "Adobe-GB1-UCS2");
face = fontdesc->font->ft_face;
kind = ft_kind(face);
goto skip_encoding;
}
}
face = fontdesc->font->ft_face;
kind = ft_kind(face);
/* Encoding */
symbolic = fontdesc->flags & 4;
if (face->num_charmaps > 0)
cmap = face->charmaps[0];
else
cmap = NULL;
for (i = 0; i < face->num_charmaps; i++)
{
FT_CharMap test = face->charmaps[i];
if (kind == TYPE1)
{
if (test->platform_id == 7)
cmap = test;
}
if (kind == TRUETYPE)
{
if (test->platform_id == 1 && test->encoding_id == 0)
cmap = test;
if (test->platform_id == 3 && test->encoding_id == 1)
cmap = test;
if (symbolic && test->platform_id == 3 && test->encoding_id == 0)
cmap = test;
}
}
if (cmap)
{
fterr = FT_Set_Charmap(face, cmap);
if (fterr)
fz_warn(ctx, "freetype could not set cmap: %s", ft_error_string(fterr));
}
else
fz_warn(ctx, "freetype could not find any cmaps");
etable = fz_malloc_array(ctx, 256, sizeof(unsigned short));
fontdesc->size += 256 * sizeof(unsigned short);
for (i = 0; i < 256; i++)
{
estrings[i] = NULL;
etable[i] = 0;
}
encoding = pdf_dict_gets(dict, "Encoding");
if (encoding)
{
if (pdf_is_name(encoding))
pdf_load_encoding(estrings, pdf_to_name(encoding));
if (pdf_is_dict(encoding))
{
pdf_obj *base, *diff, *item;
base = pdf_dict_gets(encoding, "BaseEncoding");
if (pdf_is_name(base))
pdf_load_encoding(estrings, pdf_to_name(base));
else if (!fontdesc->is_embedded && !symbolic)
pdf_load_encoding(estrings, "StandardEncoding");
diff = pdf_dict_gets(encoding, "Differences");
if (pdf_is_array(diff))
{
n = pdf_array_len(diff);
k = 0;
for (i = 0; i < n; i++)
{
item = pdf_array_get(diff, i);
if (pdf_is_int(item))
k = pdf_to_int(item);
if (pdf_is_name(item) && k >= 0 && k < nelem(estrings))
estrings[k++] = pdf_to_name(item);
}
}
}
}
/* start with the builtin encoding */
for (i = 0; i < 256; i++)
etable[i] = ft_char_index(face, i);
fz_lock(ctx, FZ_LOCK_FREETYPE);
/* built-in and substitute fonts may be a different type than what the document expects */
subtype = pdf_to_name(pdf_dict_gets(dict, "Subtype"));
if (!strcmp(subtype, "Type1"))
kind = TYPE1;
else if (!strcmp(subtype, "MMType1"))
kind = TYPE1;
else if (!strcmp(subtype, "TrueType"))
kind = TRUETYPE;
else if (!strcmp(subtype, "CIDFontType0"))
kind = TYPE1;
else if (!strcmp(subtype, "CIDFontType2"))
kind = TRUETYPE;
/* encode by glyph name where we can */
if (kind == TYPE1)
{
for (i = 0; i < 256; i++)
{
if (estrings[i])
{
etable[i] = FT_Get_Name_Index(face, estrings[i]);
if (etable[i] == 0)
{
int aglcode = pdf_lookup_agl(estrings[i]);
const char **dupnames = pdf_lookup_agl_duplicates(aglcode);
while (*dupnames)
{
etable[i] = FT_Get_Name_Index(face, (char*)*dupnames);
if (etable[i])
break;
dupnames++;
}
}
}
}
}
/* encode by glyph name where we can */
if (kind == TRUETYPE)
{
/* Unicode cmap */
if (!symbolic && face->charmap && face->charmap->platform_id == 3)
{
for (i = 0; i < 256; i++)
{
if (estrings[i])
{
int aglcode = pdf_lookup_agl(estrings[i]);
if (!aglcode)
etable[i] = FT_Get_Name_Index(face, estrings[i]);
else
etable[i] = ft_char_index(face, aglcode);
}
}
}
/* MacRoman cmap */
else if (!symbolic && face->charmap && face->charmap->platform_id == 1)
{
for (i = 0; i < 256; i++)
{
if (estrings[i])
{
k = lookup_mre_code(estrings[i]);
if (k <= 0)
etable[i] = FT_Get_Name_Index(face, estrings[i]);
else
etable[i] = ft_char_index(face, k);
}
}
}
/* Symbolic cmap */
else if (!face->charmap || face->charmap->encoding != FT_ENCODING_MS_SYMBOL)
{
for (i = 0; i < 256; i++)
{
if (estrings[i])
{
etable[i] = FT_Get_Name_Index(face, estrings[i]);
if (etable[i] == 0)
etable[i] = ft_char_index(face, i);
}
}
}
}
/* try to reverse the glyph names from the builtin encoding */
for (i = 0; i < 256; i++)
{
if (etable[i] && !estrings[i])
{
if (FT_HAS_GLYPH_NAMES(face))
{
fterr = FT_Get_Glyph_Name(face, etable[i], ebuffer[i], 32);
if (fterr)
fz_warn(ctx, "freetype get glyph name (gid %d): %s", etable[i], ft_error_string(fterr));
if (ebuffer[i][0])
estrings[i] = ebuffer[i];
}
else
{
estrings[i] = (char*) pdf_win_ansi[i]; /* discard const */
}
}
}
/* symbolic Type 1 fonts with an implicit encoding and non-standard glyph names */
if (kind == TYPE1 && symbolic)
{
for (i = 0; i < 256; i++)
if (etable[i] && estrings[i] && !pdf_lookup_agl(estrings[i]))
estrings[i] = (char*) pdf_standard[i];
}
fz_unlock(ctx, FZ_LOCK_FREETYPE);
fontdesc->encoding = pdf_new_identity_cmap(ctx, 0, 1);
fontdesc->size += pdf_cmap_size(ctx, fontdesc->encoding);
fontdesc->cid_to_gid_len = 256;
fontdesc->cid_to_gid = etable;
fz_try(ctx)
{
pdf_load_to_unicode(xref, fontdesc, estrings, NULL, pdf_dict_gets(dict, "ToUnicode"));
}
fz_catch(ctx)
{
fz_warn(ctx, "cannot load ToUnicode CMap");
}
skip_encoding:
/* Widths */
pdf_set_default_hmtx(ctx, fontdesc, fontdesc->missing_width);
widths = pdf_dict_gets(dict, "Widths");
if (widths)
{
int first, last;
first = pdf_to_int(pdf_dict_gets(dict, "FirstChar"));
last = pdf_to_int(pdf_dict_gets(dict, "LastChar"));
if (first < 0 || last > 255 || first > last)
first = last = 0;
for (i = 0; i < last - first + 1; i++)
{
int wid = pdf_to_int(pdf_array_get(widths, i));
pdf_add_hmtx(ctx, fontdesc, i + first, i + first, wid);
}
}
else
{
fz_lock(ctx, FZ_LOCK_FREETYPE);
fterr = FT_Set_Char_Size(face, 1000, 1000, 72, 72);
if (fterr)
fz_warn(ctx, "freetype set character size: %s", ft_error_string(fterr));
for (i = 0; i < 256; i++)
{
pdf_add_hmtx(ctx, fontdesc, i, i, ft_width(ctx, fontdesc, i));
}
fz_unlock(ctx, FZ_LOCK_FREETYPE);
}
pdf_end_hmtx(ctx, fontdesc);
}
fz_catch(ctx)
{
if (fontdesc && etable != fontdesc->cid_to_gid)
fz_free(ctx, etable);
pdf_drop_font(ctx, fontdesc);
fz_throw(ctx, "cannot load simple font (%d %d R)", pdf_to_num(dict), pdf_to_gen(dict));
}
return fontdesc;
}
static fz_error
loadsimplefont(pdf_fontdesc **fontdescp, pdf_xref *xref, fz_obj *dict)
{
fz_error error;
fz_obj *descriptor;
fz_obj *encoding;
fz_obj *widths;
unsigned short *etable = nil;
pdf_fontdesc *fontdesc;
fz_bbox bbox;
FT_Face face;
FT_CharMap cmap;
int kind;
int symbolic;
char *basefont;
char *fontname;
char *estrings[256];
char ebuffer[256][32];
int i, k, n;
int fterr;
basefont = fz_toname(fz_dictgets(dict, "BaseFont"));
fontname = cleanfontname(basefont);
/* Load font file */
fontdesc = pdf_newfontdesc();
pdf_logfont("load simple font (%d %d R) ptr=%p {\n", fz_tonum(dict), fz_togen(dict), fontdesc);
pdf_logfont("basefont %s -> %s\n", basefont, fontname);
descriptor = fz_dictgets(dict, "FontDescriptor");
if (descriptor)
error = pdf_loadfontdescriptor(fontdesc, xref, descriptor, nil, basefont);
else
error = pdf_loadbuiltinfont(fontdesc, fontname);
if (error)
goto cleanup;
face = fontdesc->font->ftface;
kind = ftkind(face);
pdf_logfont("ft name '%s' '%s'\n", face->family_name, face->style_name);
bbox.x0 = (face->bbox.xMin * 1000) / face->units_per_EM;
bbox.y0 = (face->bbox.yMin * 1000) / face->units_per_EM;
bbox.x1 = (face->bbox.xMax * 1000) / face->units_per_EM;
bbox.y1 = (face->bbox.yMax * 1000) / face->units_per_EM;
pdf_logfont("ft bbox [%d %d %d %d]\n", bbox.x0, bbox.y0, bbox.x1, bbox.y1);
if (bbox.x0 == bbox.x1)
fz_setfontbbox(fontdesc->font, -1000, -1000, 2000, 2000);
else
fz_setfontbbox(fontdesc->font, bbox.x0, bbox.y0, bbox.x1, bbox.y1);
/* Encoding */
symbolic = fontdesc->flags & 4;
if (face->num_charmaps > 0)
cmap = face->charmaps[0];
else
cmap = nil;
for (i = 0; i < face->num_charmaps; i++)
{
FT_CharMap test = face->charmaps[i];
if (kind == TYPE1)
{
if (test->platform_id == 7)
cmap = test;
}
if (kind == TRUETYPE)
{
if (test->platform_id == 1 && test->encoding_id == 0)
cmap = test;
if (test->platform_id == 3 && test->encoding_id == 1)
cmap = test;
}
}
if (cmap)
{
fterr = FT_Set_Charmap(face, cmap);
if (fterr)
fz_warn("freetype could not set cmap: %s", ft_errorstring(fterr));
}
else
fz_warn("freetype could not find any cmaps");
etable = fz_malloc(sizeof(unsigned short) * 256);
for (i = 0; i < 256; i++)
{
estrings[i] = nil;
etable[i] = 0;
}
encoding = fz_dictgets(dict, "Encoding");
if (encoding)
{
if (fz_isname(encoding))
pdf_loadencoding(estrings, fz_toname(encoding));
if (fz_isdict(encoding))
{
fz_obj *base, *diff, *item;
base = fz_dictgets(encoding, "BaseEncoding");
if (fz_isname(base))
pdf_loadencoding(estrings, fz_toname(base));
else if (!fontdesc->isembedded && !symbolic)
pdf_loadencoding(estrings, "StandardEncoding");
/* cf. http://bugs.ghostscript.com/show_bug.cgi?id=690615 and http://code.google.com/p/sumatrapdf/issues/detail?id=687 */
/* try to extract an encoding from the font or synthesize a likely one */
/* note: FT_Get_Name_Index fails for symbolic CFF fonts, so let them be encoded by index */
else if (!fontdesc->encoding && !ftloadt1encoding(face, estrings) && !(symbolic && !strcmp(FT_Get_X11_Font_Format(face), "CFF")))
pdf_loadencoding(estrings, "StandardEncoding");
diff = fz_dictgets(encoding, "Differences");
if (fz_isarray(diff))
{
n = fz_arraylen(diff);
k = 0;
for (i = 0; i < n; i++)
{
item = fz_arrayget(diff, i);
if (fz_isint(item))
k = fz_toint(item);
if (fz_isname(item))
estrings[k++] = fz_toname(item);
if (k < 0) k = 0;
if (k > 255) k = 255;
}
}
}
}
/* start with the builtin encoding */
for (i = 0; i < 256; i++)
etable[i] = ftcharindex(face, i);
/* encode by glyph name where we can */
if (kind == TYPE1)
{
pdf_logfont("encode type1/cff by strings\n");
for (i = 0; i < 256; i++)
{
if (estrings[i])
{
etable[i] = FT_Get_Name_Index(face, estrings[i]);
if (etable[i] == 0)
{
int aglcode = pdf_lookupagl(estrings[i]);
char **aglnames = pdf_lookupaglnames(aglcode);
while (*aglnames)
{
etable[i] = FT_Get_Name_Index(face, *aglnames);
if (etable[i])
break;
aglnames++;
}
}
}
}
}
/* encode by glyph name where we can */
if (kind == TRUETYPE)
{
/* Unicode cmap */
if (!symbolic && face->charmap && face->charmap->platform_id == 3)
{
pdf_logfont("encode truetype via unicode\n");
for (i = 0; i < 256; i++)
{
if (estrings[i])
{
int aglcode = pdf_lookupagl(estrings[i]);
if (!aglcode)
etable[i] = FT_Get_Name_Index(face, estrings[i]);
else
etable[i] = ftcharindex(face, aglcode);
}
}
}
/* MacRoman cmap */
else if (!symbolic && face->charmap && face->charmap->platform_id == 1)
{
pdf_logfont("encode truetype via macroman\n");
for (i = 0; i < 256; i++)
{
if (estrings[i])
{
k = mrecode(estrings[i]);
if (k <= 0)
etable[i] = FT_Get_Name_Index(face, estrings[i]);
else
etable[i] = ftcharindex(face, k);
}
}
}
/* Symbolic cmap */
else
{
pdf_logfont("encode truetype symbolic\n");
for (i = 0; i < 256; i++)
{
if (estrings[i])
{
etable[i] = FT_Get_Name_Index(face, estrings[i]);
if (etable[i] == 0)
etable[i] = ftcharindex(face, i);
}
}
}
}
/* try to reverse the glyph names from the builtin encoding */
for (i = 0; i < 256; i++)
{
if (etable[i] && !estrings[i])
{
if (FT_HAS_GLYPH_NAMES(face))
{
fterr = FT_Get_Glyph_Name(face, etable[i], ebuffer[i], 32);
if (fterr)
fz_warn("freetype get glyph name (gid %d): %s", etable[i], ft_errorstring(fterr));
if (ebuffer[i][0])
estrings[i] = ebuffer[i];
}
else
{
estrings[i] = (char*) pdf_winansi[i]; /* discard const */
}
}
}
/* Prevent encoding Differences from being overwritten by reloading them */
/* cf. http://code.google.com/p/sumatrapdf/issues/detail?id=115 */
if (fz_isdict(encoding))
{
fz_obj *diff, *item;
diff = fz_dictgets(encoding, "Differences");
if (fz_isarray(diff))
{
n = fz_arraylen(diff);
k = 0;
for (i = 0; i < n; i++)
{
item = fz_arrayget(diff, i);
if (fz_isint(item))
k = fz_toint(item);
if (fz_isname(item))
estrings[k++] = fz_toname(item);
if (k < 0) k = 0;
if (k > 255) k = 255;
}
}
}
fontdesc->encoding = pdf_newidentitycmap(0, 1);
fontdesc->ncidtogid = 256;
fontdesc->cidtogid = etable;
error = pdf_loadtounicode(fontdesc, xref, estrings, nil, fz_dictgets(dict, "ToUnicode"));
if (error)
goto cleanup;
/* Widths */
pdf_setdefaulthmtx(fontdesc, fontdesc->missingwidth);
widths = fz_dictgets(dict, "Widths");
if (widths)
{
int first, last;
first = fz_toint(fz_dictgets(dict, "FirstChar"));
last = fz_toint(fz_dictgets(dict, "LastChar"));
if (first < 0 || last > 255 || first > last)
first = last = 0;
for (i = 0; i < last - first + 1; i++)
{
int wid = fz_toint(fz_arrayget(widths, i));
pdf_addhmtx(fontdesc, i + first, i + first, wid);
}
}
else
{
fterr = FT_Set_Char_Size(face, 1000, 1000, 72, 72);
if (fterr)
fz_warn("freetype set character size: %s", ft_errorstring(fterr));
for (i = 0; i < 256; i++)
{
pdf_addhmtx(fontdesc, i, i, ftwidth(fontdesc, i));
}
}
pdf_endhmtx(fontdesc);
pdf_logfont("}\n");
*fontdescp = fontdesc;
return fz_okay;
cleanup:
if (etable != fontdesc->cidtogid)
fz_free(etable);
pdf_dropfont(fontdesc);
return fz_rethrow(error, "cannot load simple font (%d %d R)", fz_tonum(dict), fz_togen(dict));
}
int shape (lua_State *L) {
const char * text = luaL_checkstring(L, 1);
FT_Face face = lua_touserdata(L, 2);
const char * script = luaL_checkstring(L, 3);
const char * direction_s = luaL_checkstring(L, 4);
const char * lang = luaL_checkstring(L, 5);
double point_size = luaL_checknumber(L, 6);
const char * featurestring = luaL_checkstring(L, 7);
hb_segment_properties_t segment_props;
hb_shape_plan_t *shape_plan;
hb_direction_t direction;
hb_feature_t* features;
int nFeatures = 0;
unsigned int glyph_count = 0;
hb_font_t *hb_ft_font;
hb_face_t *hb_ft_face;
hb_buffer_t *buf;
hb_glyph_info_t *glyph_info;
hb_glyph_position_t *glyph_pos;
unsigned int j;
features = scan_feature_string(featurestring, &nFeatures);
if (!strcasecmp(direction_s,"RTL"))
direction = HB_DIRECTION_RTL;
else if (!strcasecmp(direction_s,"TTB"))
direction = HB_DIRECTION_TTB;
else
direction = HB_DIRECTION_LTR;
hb_ft_font = hb_ft_font_create(face, NULL);
hb_face_t* hbFace = hb_font_get_face(hb_ft_font);
buf = hb_buffer_create();
hb_buffer_add_utf8(buf, text, strlen(text), 0, strlen(text));
hb_buffer_set_script(buf, hb_tag_from_string(script, strlen(script)));
hb_buffer_set_direction(buf, direction);
hb_buffer_set_language(buf, hb_language_from_string(lang,strlen(lang)));
hb_buffer_guess_segment_properties(buf);
hb_buffer_get_segment_properties(buf, &segment_props);
shape_plan = hb_shape_plan_create_cached(hbFace, &segment_props, features, nFeatures, NULL);
int res = hb_shape_plan_execute(shape_plan, hb_ft_font, buf, features, nFeatures);
glyph_info = hb_buffer_get_glyph_infos(buf, &glyph_count);
glyph_pos = hb_buffer_get_glyph_positions(buf, &glyph_count);
lua_checkstack(L, glyph_count);
for (j = 0; j < glyph_count; ++j) {
char namebuf[255];
box glyph_extents = { 0.0, 0.0, 0.0 };
calculate_extents(&glyph_extents, glyph_info[j], glyph_pos[j], face, point_size, direction);
lua_newtable(L);
lua_pushstring(L, "name");
FT_Get_Glyph_Name( face, glyph_info[j].codepoint, namebuf, 255 );
lua_pushstring(L, namebuf);
lua_settable(L, -3);
if (direction != HB_DIRECTION_TTB) { /* XXX */
if (glyph_pos[j].x_offset) {
lua_pushstring(L, "x_offset");
lua_pushnumber(L, glyph_pos[j].x_offset / 64.0);
lua_settable(L, -3);
}
if (glyph_pos[j].y_offset) {
lua_pushstring(L, "y_offset");
lua_pushnumber(L, glyph_pos[j].y_offset / 64.0);
lua_settable(L, -3);
}
}
lua_pushstring(L, "codepoint");
lua_pushinteger(L, glyph_info[j].codepoint);
lua_settable(L, -3);
lua_pushstring(L, "width");
lua_pushnumber(L, glyph_extents.width);
lua_settable(L, -3);
lua_pushstring(L, "height");
lua_pushnumber(L, glyph_extents.height);
lua_settable(L, -3);
lua_pushstring(L, "depth");
lua_pushnumber(L, glyph_extents.depth);
lua_settable(L, -3);
}
/* Cleanup */
hb_buffer_destroy(buf);
hb_font_destroy(hb_ft_font);
hb_shape_plan_destroy(shape_plan);
free(features);
return glyph_count;
}
static fz_error
loadsimplefont(pdf_fontdesc **fontdescp, pdf_xref *xref, fz_obj *dict)
{
fz_error error;
fz_obj *descriptor = nil;
fz_obj *encoding = nil;
fz_obj *widths = nil;
unsigned short *etable = nil;
pdf_fontdesc *fontdesc;
fz_irect bbox;
FT_Face face;
FT_CharMap cmap;
int kind;
int symbolic;
char *basefont;
char *fontname;
char *estrings[256];
char ebuffer[256][32];
int i, k, n;
int fterr;
basefont = fz_toname(fz_dictgets(dict, "BaseFont"));
fontname = cleanfontname(basefont);
/*
* Load font file
*/
fontdesc = pdf_newfontdesc();
if (!fontdesc)
return fz_rethrow(-1, "out of memory");
pdf_logfont("load simple font (%d %d R) ptr=%p {\n", fz_tonum(dict), fz_togen(dict), fontdesc);
pdf_logfont("basefont0 %s\n", basefont);
pdf_logfont("basefont1 %s\n", fontname);
descriptor = fz_dictgets(dict, "FontDescriptor");
if (descriptor && basefont == fontname)
error = pdf_loadfontdescriptor(fontdesc, xref, descriptor, nil);
else
error = pdf_loadbuiltinfont(fontdesc, fontname);
if (error)
goto cleanup;
face = fontdesc->font->ftface;
kind = ftkind(face);
pdf_logfont("ft name '%s' '%s'\n", face->family_name, face->style_name);
bbox.x0 = (face->bbox.xMin * 1000) / face->units_per_EM;
bbox.y0 = (face->bbox.yMin * 1000) / face->units_per_EM;
bbox.x1 = (face->bbox.xMax * 1000) / face->units_per_EM;
bbox.y1 = (face->bbox.yMax * 1000) / face->units_per_EM;
pdf_logfont("ft bbox [%d %d %d %d]\n", bbox.x0, bbox.y0, bbox.x1, bbox.y1);
if (bbox.x0 == bbox.x1)
fz_setfontbbox(fontdesc->font, -1000, -1000, 2000, 2000);
else
fz_setfontbbox(fontdesc->font, bbox.x0, bbox.y0, bbox.x1, bbox.y1);
/*
* Encoding
*/
symbolic = fontdesc->flags & 4;
if (face->num_charmaps > 0)
cmap = face->charmaps[0];
else
cmap = nil;
for (i = 0; i < face->num_charmaps; i++)
{
FT_CharMap test = face->charmaps[i];
if (kind == TYPE1)
{
if (test->platform_id == 7)
cmap = test;
}
if (kind == TRUETYPE)
{
if (test->platform_id == 1 && test->encoding_id == 0)
cmap = test;
if (test->platform_id == 3 && test->encoding_id == 1)
cmap = test;
}
}
if (cmap)
{
fterr = FT_Set_Charmap(face, cmap);
if (fterr)
fz_warn("freetype could not set cmap: %s", ft_errorstring(fterr));
}
else
fz_warn("freetype could not find any cmaps");
etable = fz_malloc(sizeof(unsigned short) * 256);
if (!etable)
goto cleanup;
for (i = 0; i < 256; i++)
{
estrings[i] = nil;
etable[i] = 0;
}
encoding = fz_dictgets(dict, "Encoding");
if (encoding && !(kind == TRUETYPE && symbolic))
{
if (fz_isname(encoding))
pdf_loadencoding(estrings, fz_toname(encoding));
if (fz_isdict(encoding))
{
fz_obj *base, *diff, *item;
base = fz_dictgets(encoding, "BaseEncoding");
if (fz_isname(base))
pdf_loadencoding(estrings, fz_toname(base));
else if (!fontdesc->isembedded)
pdf_loadencoding(estrings, "StandardEncoding");
diff = fz_dictgets(encoding, "Differences");
if (fz_isarray(diff))
{
n = fz_arraylen(diff);
k = 0;
for (i = 0; i < n; i++)
{
item = fz_arrayget(diff, i);
if (fz_isint(item))
k = fz_toint(item);
if (fz_isname(item))
estrings[k++] = fz_toname(item);
if (k < 0) k = 0;
if (k > 255) k = 255;
}
}
}
if (kind == TYPE1)
{
pdf_logfont("encode type1/cff by strings\n");
for (i = 0; i < 256; i++)
if (estrings[i])
etable[i] = FT_Get_Name_Index(face, estrings[i]);
else
etable[i] = ftcharindex(face, i);
}
if (kind == TRUETYPE)
{
/* Unicode cmap */
if (face->charmap && face->charmap->platform_id == 3)
{
pdf_logfont("encode truetype via unicode\n");
for (i = 0; i < 256; i++)
if (estrings[i])
{
int aglbuf[256];
int aglnum;
aglnum = pdf_lookupagl(estrings[i], aglbuf, nelem(aglbuf));
if (aglnum != 1)
etable[i] = FT_Get_Name_Index(face, estrings[i]);
else
etable[i] = ftcharindex(face, aglbuf[0]);
}
else
etable[i] = ftcharindex(face, i);
}
/* MacRoman cmap */
else if (face->charmap && face->charmap->platform_id == 1)
{
pdf_logfont("encode truetype via macroman\n");
for (i = 0; i < 256; i++)
if (estrings[i])
{
k = mrecode(estrings[i]);
if (k <= 0)
etable[i] = FT_Get_Name_Index(face, estrings[i]);
else
etable[i] = ftcharindex(face, k);
}
else
etable[i] = ftcharindex(face, i);
}
/* Symbolic cmap */
else
{
pdf_logfont("encode truetype symbolic\n");
for (i = 0; i < 256; i++)
{
etable[i] = ftcharindex(face, i);
fterr = FT_Get_Glyph_Name(face, etable[i], ebuffer[i], 32);
if (fterr)
{
error = fz_throw("freetype get glyph name (gid %d): %s", etable[i], ft_errorstring(fterr));
goto cleanup;
}
if (ebuffer[i][0])
estrings[i] = ebuffer[i];
}
}
}
}
else
{
pdf_logfont("encode builtin\n");
for (i = 0; i < 256; i++)
{
etable[i] = ftcharindex(face, i);
if (etable[i] == 0)
continue;
if (FT_HAS_GLYPH_NAMES(face))
{
fterr = FT_Get_Glyph_Name(face, etable[i], ebuffer[i], 32);
if (fterr)
{
error = fz_throw("freetype get glyph name (gid %d): %s", etable[i], ft_errorstring(fterr));
goto cleanup;
}
if (ebuffer[i][0])
estrings[i] = ebuffer[i];
}
}
}
error = pdf_newidentitycmap(&fontdesc->encoding, 0, 1);
if (error)
goto cleanup;
fontdesc->ncidtogid = 256;
fontdesc->cidtogid = etable;
error = pdf_loadtounicode(fontdesc, xref, estrings, nil, fz_dictgets(dict, "ToUnicode"));
if (error)
goto cleanup;
/*
* Widths
*/
pdf_setdefaulthmtx(fontdesc, fontdesc->missingwidth);
widths = fz_dictgets(dict, "Widths");
if (widths)
{
int first, last;
first = fz_toint(fz_dictgets(dict, "FirstChar"));
last = fz_toint(fz_dictgets(dict, "LastChar"));
if (first < 0 || last > 255 || first > last)
first = last = 0;
for (i = 0; i < last - first + 1; i++)
{
int wid = fz_toint(fz_arrayget(widths, i));
error = pdf_addhmtx(fontdesc, i + first, i + first, wid);
if (error)
goto cleanup;
}
}
else
{
fterr = FT_Set_Char_Size(face, 1000, 1000, 72, 72);
if (fterr)
fz_warn("freetype set character size: %s", ft_errorstring(fterr));
for (i = 0; i < 256; i++)
{
error = pdf_addhmtx(fontdesc, i, i, ftwidth(fontdesc, i));
if (error)
goto cleanup;
}
}
error = pdf_endhmtx(fontdesc);
if (error)
goto cleanup;
pdf_logfont("}\n");
*fontdescp = fontdesc;
return fz_okay;
cleanup:
fz_free(etable);
fz_dropfont(fontdesc->font);
fz_free(fontdesc);
return fz_rethrow(error, "cannot load simple font");
}
static int
glnames(
GLYPH *glyph_list
)
{
#define MAX_NAMELEN 1024
#ifdef XP_PSTEXT
char buf[1024];
long i;
FT_Error error;
#ifdef XP_ONLY_BLOCKS
extern unsigned long xp_font_block_offset;
extern FTFontPtr xp_xtf;
int bc; /* block counter */
/* FixMe: This code should use PsOut_Get_FreeType_Glyph_Name() instead of
* duplicating the code
*/
for( bc = xp_font_block_offset ; bc < (xp_font_block_offset+256) ; bc++ ) {
/* Remap X11 font index to FreeType font index */
i = FTRemap(face, &xp_xtf->mapping, bc);
if( i >= face->num_glyphs )
continue;
#else
for(i=0; i < face->num_glyphs; i++) {
#endif /* XP_ONLY_BLOCKS */
if( FT_Has_PS_Glyph_Names(face) ) {
error = FT_Get_Glyph_Name(face, i, buf, MAX_NAMELEN);
}
else
{
error = -1;
}
if( error ) {
/* Check for unicode mapping
* See Adobe document "Unicode and Glyph Names"
* (http://partners.adobe.com/asn/tech/type/unicodegn.jsp)
*/
if( (xp_xtf->mapping.mapping->type == FONT_ENCODING_UNICODE) &&
(i < 0xFFFE) )
{
sprintf(buf, "uni%04lx", i);
}
else
{
sprintf(buf, "ch%02lx", i);
}
}
glyph_list[i].name = strdup(buf);
if(ISDBG(FT)) fprintf(stderr, "%d has name %s\n", i, buf);
if (glyph_list[i].name == NULL) {
fprintf (stderr, "****malloc failed %s line %d\n", __FILE__, __LINE__);
exit(255);
}
}
return 0;
#else
char bf[1024];
long i;
if( ! FT_HAS_GLYPH_NAMES(face) ) {
WARNING_1 fprintf(stderr, "Font has no glyph names\n");
return 1;
}
for(i=0; i < face->num_glyphs; i++) {
if( FT_Get_Glyph_Name(face, i, bf, MAX_NAMELEN) || bf[0]==0 ) {
sprintf(bf, "_g_%d", i);
WARNING_2 fprintf(stderr,
"Glyph No. %d has no postscript name, becomes %s\n", i, bf);
}
glyph_list[i].name = strdup(bf);
if(ISDBG(FT)) fprintf(stderr, "%d has name %s\n", i, bf);
if (glyph_list[i].name == NULL) {
fprintf (stderr, "****malloc failed %s line %d\n", __FILE__, __LINE__);
exit(255);
}
}
return 0;
#endif /* XP_PSTEXT */
}
/*
* Get the metrics of the glyphs.
*/
static void
glmetrics(
GLYPH *glyph_list
)
{
GLYPH *g;
int i;
FT_Glyph_Metrics *met;
FT_BBox bbox;
FT_Glyph gly;
#ifdef XP_ONLY_BLOCKS
extern unsigned long xp_font_block_offset;
extern FTFontPtr xp_xtf;
int bc; /* block counter */
for( bc = xp_font_block_offset ; bc < (xp_font_block_offset+256) ; bc++ ) {
/* Remap X11 font index to FreeType font index */
i = FTRemap(face, &xp_xtf->mapping, bc);
if( i >= face->num_glyphs )
continue;
#else
for(i=0; i < face->num_glyphs; i++) {
#endif /* XP_ONLY_BLOCKS */
g = &(glyph_list[i]);
if( FT_Load_Glyph(face, i, FT_LOAD_NO_BITMAP|FT_LOAD_NO_SCALE) ) {
fprintf(stderr, "Can't load glyph %s, skipped\n", g->name);
continue;
}
met = &face->glyph->metrics;
if(FT_HAS_HORIZONTAL(face)) {
g->width = met->horiAdvance;
g->lsb = met->horiBearingX;
} else {
WARNING_2 fprintf(stderr, "Glyph %s has no horizontal metrics, guessed them\n", g->name);
g->width = met->width;
g->lsb = 0;
}
if( FT_Get_Glyph(face->glyph, &gly) ) {
fprintf(stderr, "Can't access glyph %s bbox, skipped\n", g->name);
continue;
}
FT_Glyph_Get_CBox(gly, ft_glyph_bbox_unscaled, &bbox);
g->xMin = bbox.xMin;
g->yMin = bbox.yMin;
g->xMax = bbox.xMax;
g->yMax = bbox.yMax;
g->ttf_pathlen = face->glyph->outline.n_points;
}
}
/*
* Get the original encoding of the font.
* Returns 1 for if the original encoding is Unicode, 2 if the
* original encoding is other 16-bit, 0 if 8-bit.
*/
static int
glenc(
GLYPH *glyph_list,
int *encoding,
int *unimap
)
{
#ifdef XP_PSTEXT
int i,
e;
unsigned code;
extern FTFontPtr xp_xtf;
extern unsigned long xp_font_block_offset;
enc_found = 1;
enc_type = 0;
for(i=0; i<ENCTABSZ; i++) {
if(encoding[i] != -1)
continue;
/* Remap X11 font index to FreeType font index */
code = FTRemap(face, &xp_xtf->mapping, xp_font_block_offset+i);
if(code == 0)
continue; /* .notdef */
encoding[i] = code;
}
return enc_type;
#else
int i, e;
unsigned code;
if(ISDBG(FT))
for(e=0; e < face->num_charmaps; e++) {
fprintf(stderr, "found encoding pid=%d eid=%d\n",
face->charmaps[e]->platform_id,
face->charmaps[e]->encoding_id);
}
if(enc_found)
goto populate_map;
enc_type = 0;
/* first check for an explicit PID/EID */
if(force_pid != -1) {
for(e=0; e < face->num_charmaps; e++) {
if(face->charmaps[e]->platform_id == force_pid
&& face->charmaps[e]->encoding_id == force_eid) {
WARNING_1 fprintf(stderr, "Found Encoding PID=%d/EID=%d\n",
force_pid, force_eid);
if( FT_Set_Charmap(face, face->charmaps[e]) ) {
fprintf(stderr, "**** Cannot set charmap in FreeType ****\n");
exit(1);
}
enc_type = 1;
goto populate_map;
}
}
fprintf(stderr, "*** TTF encoding table PID=%d/EID=%d not found\n",
force_pid, force_eid);
exit(1);
}
/* next check for a direct Adobe mapping */
if(!forcemap) {
for(e=0; e < face->num_charmaps; e++) {
if(face->charmaps[e]->encoding == ft_encoding_adobe_custom) {
WARNING_1 fputs("Found Adobe Custom Encoding\n", stderr);
if( FT_Set_Charmap(face, face->charmaps[e]) ) {
fprintf(stderr, "**** Cannot set charmap in FreeType ****\n");
exit(1);
}
goto populate_map;
}
}
}
for(e=0; e < face->num_charmaps; e++) {
if(face->charmaps[e]->platform_id == 3) {
switch(face->charmaps[e]->encoding_id) {
case 0:
WARNING_1 fputs("Found Symbol Encoding\n", stderr);
break;
case 1:
WARNING_1 fputs("Found Unicode Encoding\n", stderr);
enc_type = 1;
break;
default:
WARNING_1 {
fprintf(stderr,
"****MS Encoding ID %d not supported****\n",
face->charmaps[e]->encoding_id);
fputs("Treating it like Symbol encoding\n", stderr);
}
break;
}
break;
}
}
if(e >= face->num_charmaps) {
WARNING_1 fputs("No Microsoft encoding, using first encoding available\n", stderr);
e = 0;
}
if( FT_Set_Charmap(face, face->charmaps[e]) ) {
fprintf(stderr, "**** Cannot set charmap in FreeType ****\n");
exit(1);
}
populate_map:
enc_found = 1;
for(i=0; i<ENCTABSZ; i++) {
if(encoding[i] != -1)
continue;
if(enc_type == 1 || forcemap) {
code = unimap[i];
if(code == (unsigned) -1)
continue;
} else
code = i;
code = FT_Get_Char_Index(face, code);
if(0 && ISDBG(FT)) fprintf(stderr, "code of %3d is %3d\n", i, code);
if(code == 0)
continue; /* .notdef */
encoding[i] = code;
}
return enc_type;
#endif /* XP_PSTEXT */
}
encoding *
TTFget_first_glyphs(Font *fnt, long *array)
{
unsigned int i, j, Num=0;
unsigned int index_array[257]; /* we ignore glyph index 0 */
char buff[128];
const char *n;
encoding *e = (encoding *)mymalloc(sizeof (encoding));
if (!array)
oops("Invalid parameter in call to TTFget_first_glyphs()");
for (i = 0; i < 257; i++)
index_array[i] = 0;
j = 0;
if (fnt->PSnames != Only)
{
for (i = 0; i <= 0x16FFFF; i++)
{
Num = FT_Get_Char_Index(face, i);
if (Num == 0)
continue;
if (Num <= 256)
index_array[Num] = 1;
if (fnt->PSnames)
{
(void)FT_Get_Glyph_Name(face,Num,buff,128);
n = newstring(buff);
}
else
n = code_to_adobename(i);
if (strcmp(n, ".notdef") == 0)
continue;
if (strcmp(n, ".null") == 0)
continue;
if (strcmp(n, "nonmarkingreturn") == 0)
continue;
if (j < 256)
{
array[j] = i;
e->vec[j] = n;
}
else
return e;
j++;
}
if (!fnt->PSnames)
{
for (i = 1; i < face->num_glyphs; i++)
{
if (index_array[i] == 0)
{
if (j < 256)
{
array[j] = i | 0x1000000;
e->vec[j] = code_to_adobename(i | 0x1000000);
}
else
return e;
j++;
}
}
}
}
else
{
for (i = 0; i < face->num_glyphs; i++)
{
(void)FT_Get_Glyph_Name(face,Num,buff,128);
n = newstring(buff);
if (strcmp(n, ".notdef") == 0)
continue;
if (strcmp(n, ".null") == 0)
continue;
if (strcmp(n, "nonmarkingreturn") == 0)
continue;
if (j < 256)
{
array[j] = i | 0x1000000;
e->vec[j] = n;
}
else
return e;
j++;
}
}
return NULL; /* never reached */
}
SWFFONT* swf_LoadTrueTypeFont(const char*filename, char flashtype)
{
FT_Face face;
FT_Error error;
const char* name = 0;
FT_ULong charcode;
FT_UInt gindex;
SWFFONT* font;
int t;
int*glyph2glyph;
int max_unicode = 0;
int charmap = -1;
if(ftlibrary == 0) {
if(FT_Init_FreeType(&ftlibrary)) {
fprintf(stderr, "Couldn't init freetype library!\n");
exit(1);
}
}
error = FT_New_Face(ftlibrary, filename, 0, &face);
if(error || !face) {
fprintf(stderr, "Couldn't load file %s- not a TTF file?\n", filename);
return 0;
}
int scale = flashtype?20:1;
FT_Set_Pixel_Sizes (face, 16*loadfont_scale*scale, 16*loadfont_scale*scale);
if(face->num_glyphs <= 0) {
fprintf(stderr, "File %s contains %d glyphs\n", filename, (int)face->num_glyphs);
return 0;
}
font = (SWFFONT*)rfx_calloc(sizeof(SWFFONT));
font->id = -1;
font->version = flashtype?3:2;
font->layout = (SWFLAYOUT*)rfx_calloc(sizeof(SWFLAYOUT));
font->layout->bounds = (SRECT*)rfx_calloc(face->num_glyphs*sizeof(SRECT));
font->style = ((face->style_flags&FT_STYLE_FLAG_ITALIC)?FONT_STYLE_ITALIC:0)
|((face->style_flags&FT_STYLE_FLAG_BOLD)?FONT_STYLE_BOLD:0);
font->encoding = FONT_ENCODING_UNICODE;
font->glyph2ascii = (U16*)rfx_calloc(face->num_glyphs*sizeof(U16));
font->maxascii = 0;
font->glyph = (SWFGLYPH*)rfx_calloc(face->num_glyphs*sizeof(SWFGLYPH));
if(FT_HAS_GLYPH_NAMES(face)) {
font->glyphnames = (char**)rfx_calloc(face->num_glyphs*sizeof(char*));
}
font->layout->kerningcount = 0;
name = face->family_name;
if(!(name && *name))
name = FT_Get_Postscript_Name(face);
if(name && *name)
font->name = (U8*)strdup(name);
while(1)
{
/* // Map Glyphs to Unicode, version 1 (quick and dirty):
int t;
for(t=0;t<65536;t++) {
int index = FT_Get_Char_Index(face, t);
if(index>=0 && index<face->num_glyphs) {
if(font->glyph2ascii[index]<0)
font->glyph2ascii[index] = t;
}
}*/
// Map Glyphs to Unicode, version 2 (much nicer):
// (The third way would be the AGL algorithm, as proposed
// by Werner Lemberg on [email protected])
charcode = FT_Get_First_Char(face, &gindex);
while(gindex != 0)
{
if(gindex >= 0 && gindex<face->num_glyphs) {
if(!font->glyph2ascii[gindex]) {
font->glyph2ascii[gindex] = charcode;
if(charcode + 1 > font->maxascii) {
font->maxascii = charcode + 1;
}
}
}
charcode = FT_Get_Next_Char(face, charcode, &gindex);
}
/* if we didn't find a single encoding character, try
the font's charmaps instead. That usually means that
the encoding is no longer unicode.
TODO: find a way to convert the encoding to unicode
*/
if(font->maxascii == 0 && charmap < face->num_charmaps - 1) {
charmap++;
FT_Set_Charmap(face, face->charmaps[charmap]);
font->encoding = 0;//anything but unicode FIXME
} else
break;
}
if(full_unicode)
font->maxascii = 65535;
font->ascii2glyph = (int*)rfx_calloc(font->maxascii*sizeof(int));
for(t=0;t<font->maxascii;t++) {
int g = FT_Get_Char_Index(face, t);
if(!g || g>=face->num_glyphs)
g = -1;
font->ascii2glyph[t] = g;
if(g>=0) {
max_unicode = t+1;
if(!font->glyph2ascii[g]) {
font->glyph2ascii[g] = t;
}
}
}
font->maxascii = max_unicode;
font->numchars = 0;
glyph2glyph = (int*)rfx_calloc(face->num_glyphs*sizeof(int));
SRECT fontbbox = {0,0,0,0};
for(t=0; t < face->num_glyphs; t++) {
FT_Glyph glyph;
FT_BBox bbox;
char name[128];
drawer_t draw;
char hasname = 0;
name[0]=0;
if(FT_HAS_GLYPH_NAMES(face)) {
error = FT_Get_Glyph_Name(face, t, name, 127);
if(!error && name[0] && !strstr(name, "notdef")) {
font->glyphnames[font->numchars] = strdup(name);
hasname = 1;
}
}
if(!font->glyph2ascii[t] && !hasname && skip_unused) {
continue;
}
error = FT_Load_Glyph(face, t, FT_LOAD_NO_BITMAP);
if(error) {
//tends to happen with some pdfs
fprintf(stderr, "Warning: Glyph %d has return code %d\n", t, error);
glyph=0;
if(skip_unused)
continue;
} else {
error = FT_Get_Glyph(face->glyph, &glyph);
if(error) {
fprintf(stderr, "Couldn't get glyph %d, error:%d\n", t, error);
glyph=0;
if(skip_unused)
continue;
}
}
if(glyph)
FT_Glyph_Get_CBox(glyph, ft_glyph_bbox_unscaled, &bbox);
else
memset(&bbox, 0, sizeof(bbox));
bbox.yMin = -bbox.yMin;
bbox.yMax = -bbox.yMax;
if(bbox.xMax < bbox.xMin) {
// swap
bbox.xMax ^= bbox.xMin;
bbox.xMin ^= bbox.xMax;
bbox.xMax ^= bbox.xMin;
}
if(bbox.yMax < bbox.yMin) {
// swap
bbox.yMax ^= bbox.yMin;
bbox.yMin ^= bbox.yMax;
bbox.yMax ^= bbox.yMin;
}
swf_Shape01DrawerInit(&draw, 0);
//error = FT_Outline_Decompose(&face->glyph->outline, &outline_functions, &draw);
if(glyph)
error = FT_Outline_Decompose(&face->glyph->outline, &outline_functions, &draw);
else
error = 0;
draw.finish(&draw);
if(error) {
fprintf(stderr, "Couldn't decompose glyph %d\n", t);
draw.dealloc(&draw);
continue;
}
#if 0
if(bbox.xMin > 0) {
font->glyph[font->numchars].advance = (bbox.xMax*20*FT_SCALE)/FT_SUBPIXELS;
} else {
font->glyph[font->numchars].advance = ((bbox.xMax - bbox.xMin)*20*FT_SCALE)/FT_SUBPIXELS;
}
#else
if(glyph)
font->glyph[font->numchars].advance = glyph->advance.x*20/65536;
else
font->glyph[font->numchars].advance = 0;
#endif
SRECT b = swf_ShapeDrawerGetBBox(&draw);
//font->layout->bounds[font->numchars].xmin = (bbox.xMin*FT_SCALE*20)/FT_SUBPIXELS;
//font->layout->bounds[font->numchars].ymin = (bbox.yMin*FT_SCALE*20)/FT_SUBPIXELS;
//font->layout->bounds[font->numchars].xmax = (bbox.xMax*FT_SCALE*20)/FT_SUBPIXELS;
//font->layout->bounds[font->numchars].ymax = (bbox.yMax*FT_SCALE*20)/FT_SUBPIXELS;
font->layout->bounds[font->numchars] = b;
font->glyph[font->numchars].shape = swf_ShapeDrawerToShape(&draw);
swf_ExpandRect2(&fontbbox, &font->layout->bounds[font->numchars]);
draw.dealloc(&draw);
if(glyph)
FT_Done_Glyph(glyph);
font->glyph2ascii[font->numchars] = font->glyph2ascii[t];
glyph2glyph[t] = font->numchars;
font->numchars++;
}
//font->layout->ascent = abs(face->ascender)*FT_SCALE*loadfont_scale*20/FT_SUBPIXELS/2; //face->bbox.xMin;
//font->layout->descent = abs(face->descender)*FT_SCALE*loadfont_scale*20/FT_SUBPIXELS/2; //face->bbox.xMax;
//font->layout->leading = font->layout->ascent + font->layout->descent;
if(-fontbbox.ymin < 0)
font->layout->ascent = 0;
else
font->layout->ascent = -fontbbox.ymin;
if(fontbbox.ymax < 0)
font->layout->descent = 0;
else
font->layout->descent = fontbbox.ymax;
int leading = fontbbox.ymax - fontbbox.ymin;
font->layout->leading = leading>0x7fff?0x7fff:leading;
/* notice: if skip_unused is true, font->glyph2ascii, font->glyphnames and font->layout->bounds will
have more memory allocated than just font->numchars, but only the first font->numchars
are used/valid */
for(t=0;t<font->maxascii;t++) {
if(font->ascii2glyph[t]>=0) {
font->ascii2glyph[t] = glyph2glyph[font->ascii2glyph[t]];
}
}
rfx_free(glyph2glyph);
FT_Done_Face(face);
FT_Done_FreeType(ftlibrary);ftlibrary=0;
return font;
}
Font::Font(const std::string filename, size_t size) {
// These are the characters that get stored to texture.
// Margins around characters to prevent them from 'bleeding' into each other.
const size_t margin = 1;
size_t image_height = 0, image_width = 512;
// Initialize FreeType
FT_Library library;
if (FT_Init_FreeType(&library)) {
LOG_FATAL("FreeType initializing failed");
} else {
LOG_STRING("FreeType initialized");
}
// Load the font
LOG_STRING("Loading font '" + filename + "'");
FT_Face face;
int error = FT_New_Face(library, filename.c_str(), 0, &face);
if (error == FT_Err_Unknown_File_Format) {
LOG_FATAL("Font loading failed: Unknown format of a file.");
} else if (error) {
LOG_FATAL("Font loading failed: The file could not be opened or read, or is broken, or else.");
}
LOG_STRING("Font loaded");
// Some checks
if (!(face->face_flags & FT_FACE_FLAG_SCALABLE)) {
LOG_FATAL("The font is not scalable)");
}
if (!(face->face_flags & FT_FACE_FLAG_HORIZONTAL)) {
LOG_FATAL("The font is not horizontal)");
}
// Set the font size
FT_Set_Pixel_Sizes(face, size, 0);
pixel_height = size;
int max_height = 0;
size_t x = margin, y = margin;
// Rasterize all the characters
int total_chars = 0;
uint32_t gindex; // glyph index
uint32_t unicode = FT_Get_First_Char(face, &gindex);
while (gindex != 0) {
char buf[100];
FT_Get_Glyph_Name(face, gindex, buf, 100);
//LOG_STRING("Available character: " + stringify<uint32_t>(unicode) + " (" + buf + ")");
// Look up the character in the font file.
if (glyphs.find(gindex) != glyphs.end()) {
unicode2glyph[unicode] = glyphs[gindex];
continue;
}
// Render the current glyph.
FT_Load_Glyph(face, gindex, FT_LOAD_RENDER | FT_LOAD_NO_HINTING);
// Save character metrics
Glyph *g = glyphs[gindex] = unicode2glyph[unicode] = new Glyph; // shortcut
g->advance = face->glyph->metrics.horiAdvance / 64;
g->width = face->glyph->bitmap.width;
g->height = face->glyph->bitmap.rows;
g->bearingX = face->glyph->metrics.horiBearingX / 64;
g->bearingY = face->glyph->metrics.horiBearingY / 64;
// Compute kerning
//for (int j = 0; j < 256; j++) {
// // Look up the second character in the font file.
// int char2_index = FT_Get_Char_Index(face, j);
// FT_Vector akerning;
// FT_Get_Kerning(face, char_index, char2_index, FT_KERNING_DEFAULT, &akerning);
// kerning[i][j] = static_cast<float>(akerning.x) / 64;
//}
// Save glyph bitmap
g->data = new unsigned char[g->width * g->height];
memcpy(g->data, face->glyph->bitmap.buffer, g->width * g->height);
// If the line is full, go to the next line
if (g->width + margin > image_width - x) {
x = margin;
y += max_height + margin;
max_height = 0;
}
g->x = x;
g->y = y;
max_height = std::max(g->height, max_height);
x += g->width + margin;
total_chars += 1;
unicode = FT_Get_Next_Char(face, unicode, &gindex);
}
LOG_STRING("Total chars in atlas: " + stringify<int>(total_chars));
FT_Done_FreeType(library);
LOG_STRING("Generating font texture atlas");
// Compute how high the texture has to be.
int needed_image_height = y + max_height + margin;
// Get the first power of two in which it fits.
image_height = 16;
while (image_height < needed_image_height) {
image_height *= 2;
}
// Allocate memory for the texture, and set it to 0.
unsigned char *image = new unsigned char[image_height * image_width];
for (int i = 0; i < image_height * image_width; i++) {
image[i] = 0;
}
// Drawing loop
for (std::map<uint32_t, Glyph*>::iterator gindex = glyphs.begin(); gindex != glyphs.end(); gindex++) {
Glyph *g = gindex->second; // shortcut
if (g->data != NULL) {
// Fill in the texture coords
g->tex_left = static_cast<float>(g->x) / image_width;
g->tex_right = static_cast<float>(g->x + g->width) / image_width;
g->tex_top = static_cast<float>(g->y) / image_height;
g->tex_bottom = static_cast<float>(g->y + g->height) / image_height;
// Copy the glyph bitmap to the texture atlas
for (size_t row = 0; row < g->height; ++row) {
memcpy(&image[g->x + (g->y + row) * image_width], &g->data[row * g->width], g->width);
}
delete[] g->data;
g->data = NULL;
}
}
LOG_STRING("Font texture atlas generated");
// Create OpenGL texture from the image.
glDeleteTextures(1, &texture);
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA8, image_width, image_height, 0, GL_ALPHA, GL_UNSIGNED_BYTE, image);
// Free the image memory.
delete[] image;
LOG_STRING("Font texture loaded");
}
void
readttf(Font *fnt, Boolean quiet, Boolean only_range)
{
FT_Error error;
ttfinfo *ti, *Ti;
long Num, index;
unsigned int i, j;
long k, max_k;
int index_array[257];
static Boolean initialized = False;
/*
* We allocate a placeholder boundary and the `.notdef' character.
*/
if (!only_range)
{
ti = newchar(fnt);
ti->charcode = -1;
ti->adobename = ".notdef";
ti = newchar(fnt);
ti->charcode = -1;
ti->adobename = "||"; /* boundary character name */
}
/*
* Initialize FreeType engine.
*/
if (!initialized)
{
/*
* We use a dummy glyph size of 10pt.
*/
dpi = 92;
ptsize = 10 * 64;
real_ttfname = TeX_search_ttf_file(&(fnt->ttfname));
if (!real_ttfname)
oops("Cannot find `%s'.", fnt->ttfname);
FTopen(real_ttfname, fnt, True, True);
initialized = True;
}
if (!quiet)
{
if (only_range)
printf("\n\n%s:\n", fnt->fullname);
printf("\n");
printf("Glyph Code Glyph Name ");
printf("Width llx lly urx ury\n");
printf("----------------------------------------");
printf("---------------------------------\n");
}
/*
* We load only glyphs with a valid cmap entry. Nevertheless, for
* the default mapping, we use the first 256 glyphs addressed by
* ascending code points, followed by glyphs not in the cmap.
*
* If we compute a range, we take the character codes given in
* the fnt->sf_code array.
*
* If the -N flag is set, no cmap is used at all. Instead, the
* first 256 glyphs (with a valid PS name) are used for the default
* mapping.
*/
if (!only_range)
for (i = 0; i < 257; i++)
index_array[i] = 0;
else
for (i = 0; i < 256; i++)
fnt->inencptrs[i] = 0;
j = 0;
if (fnt->PSnames == Only)
max_k = face->num_glyphs - 1;
else
max_k = only_range ? 0xFF : 0x16FFFF;
for (k = 0; k <= max_k; k++)
{
char buff[128];
const char *an;
if (fnt->PSnames != Only)
{
if (only_range)
{
index = fnt->sf_code[k];
if (index < 0)
continue;
j = k;
}
else
index = k;
Num = FT_Get_Char_Index(face, index);
/* now we try to get a vertical glyph form */
if (has_gsub)
Num = Get_Vert(Num);
if (Num < 0)
oops("Failure on cmap mapping from %s.", fnt->ttfname);
if (Num == 0)
continue;
if (!only_range)
if (Num <= 256)
index_array[Num] = 1;
}
else
{
Num = k;
index = 0;
}
error = FT_Load_Glyph(face, Num, flags);
if (!error)
{
if (fnt->efactor != 1.0 || fnt->slant != 0.0 )
FT_Outline_Transform(&face->glyph->outline, &matrix1);
if (fnt->rotate)
FT_Outline_Transform(&face->glyph->outline, &matrix2);
error = FT_Outline_Get_BBox(&face->glyph->outline, &bbox); /* we need the non-
grid-fitted bbox */
}
if (!error)
{
if (fnt->PSnames)
{
(void)FT_Get_Glyph_Name(face, Num, buff, 128);
an = newstring(buff);
}
else
an = code_to_adobename(index);
/* ignore characters not usable for typesetting with TeX */
if (strcmp(an, ".notdef") == 0)
continue;
if (strcmp(an, ".null") == 0)
continue;
if (strcmp(an, "nonmarkingreturn") == 0)
continue;
ti = newchar(fnt);
ti->charcode = index;
ti->glyphindex = Num;
ti->adobename = an;
ti->llx = bbox.xMin * 1000 / fnt->units_per_em;
ti->lly = bbox.yMin * 1000 / fnt->units_per_em;
ti->urx = bbox.xMax * 1000 / fnt->units_per_em;
ti->ury = bbox.yMax * 1000 / fnt->units_per_em;
ti->fntnum = fnt->subfont_num;
/*
* We must now shift the rotated character both horizontally
* and vertically. The vertical amount is 25% by default.
*/
if (fnt->rotate)
{
ti->llx += (face->glyph->metrics.vertBearingY - bbox.xMin) *
1000 / fnt->units_per_em;
ti->lly -= 1000 * fnt->y_offset;
ti->urx += (face->glyph->metrics.vertBearingY - bbox.xMin) *
1000 / fnt->units_per_em;
ti->ury -= 1000 * fnt->y_offset;
}
/*
* We need to avoid negative heights or depths. They break accents
* in math mode, among other things.
*/
if (ti->lly > 0)
ti->lly = 0;
if (ti->ury < 0)
ti->ury = 0;
if (fnt->rotate)
ti->width = face->glyph->metrics.vertAdvance * 1000 / fnt->units_per_em;
else
ti->width = transform(face->glyph->metrics.horiAdvance * 1000 / fnt->units_per_em,
0, fnt->efactor, fnt->slant);
if (!quiet)
printf("%5ld %05lx %-25s %5d % 5d,% 5d -- % 5d,% 5d\n",
Num, index, ti->adobename,
ti->width,
ti->llx, ti->lly, ti->urx, ti->ury);
if (j < 256)
{
fnt->inencptrs[j] = ti;
ti->incode = j;
}
j++;
}
}
/*
* Now we load glyphs without a cmap entry, provided some slots are
* still free -- we skip this if we have to compute a range or use
* PS names.
*/
if (!only_range && !fnt->PSnames)
{
for (i = 1; i <= face->num_glyphs; i++)
{
const char *an;
if (index_array[i] == 0)
{
error = FT_Load_Glyph(face, i, flags);
if (!error)
error = FT_Outline_Get_BBox(&face->glyph->outline, &bbox);
if (!error)
{
an = code_to_adobename(i | 0x1000000);
ti = newchar(fnt);
ti->charcode = i | 0x1000000;
ti->glyphindex = i;
ti->adobename = an;
ti->llx = bbox.xMin * 1000 / fnt->units_per_em;
ti->lly = bbox.yMin * 1000 / fnt->units_per_em;
ti->urx = bbox.xMax * 1000 / fnt->units_per_em;
ti->ury = bbox.yMax * 1000 / fnt->units_per_em;
if (ti->lly > 0)
ti->lly = 0;
if (ti->ury < 0)
ti->ury = 0;
ti->width = transform(face->glyph->metrics.horiAdvance*1000 / fnt->units_per_em,
0, fnt->efactor, fnt->slant);
if (!quiet)
printf("%5d %-25s %5d % 5d,% 5d -- % 5d,% 5d\n",
i, ti->adobename,
ti->width,
ti->llx, ti->lly, ti->urx, ti->ury);
if (j < 256)
{
fnt->inencptrs[j] = ti;
ti->incode = j;
}
else
break;
j++;
}
}
}
}
/* Finally, we construct a `Germandbls' glyph if necessary */
if (!only_range)
{
if (NULL == findadobe("Germandbls", fnt->charlist) &&
NULL != (Ti = findadobe("S", fnt->charlist)))
{
pcc *np, *nq;
ti = newchar(fnt);
ti->charcode = face->num_glyphs | 0x1000000;
ti->glyphindex = face->num_glyphs;
ti->adobename = "Germandbls";
ti->width = Ti->width << 1;
ti->llx = Ti->llx;
ti->lly = Ti->lly;
ti->urx = Ti->width + Ti->urx;
ti->ury = Ti->ury;
ti->kerns = Ti->kerns;
np = newpcc();
np->partname = "S";
nq = newpcc();
nq->partname = "S";
nq->xoffset = Ti->width;
np->next = nq;
ti->pccs = np;
ti->constructed = True;
if (!quiet)
printf("* %-25s %5d % 5d,% 5d -- % 5d,% 5d\n",
ti->adobename,
ti->width,
ti->llx, ti->lly, ti->urx, ti->ury);
}
}
/* kerning between subfonts isn't available */
if (!only_range)
readttf_kern(fnt);
}
