static void ttf_get_nice_charmap(TT_Face face,
TT_CharMap *charMap,
char *where)
{
int n,i,res,got=-1,best=-1;
if (-1==(n=TT_Get_CharMap_Count(face)))
Pike_error("%s: illegal face handle\n",where);
for (i=0; i<n; i++)
{
int ihas=0;
TT_UShort platformID, encodingID;
if ((res=TT_Get_CharMap_ID(face, (TT_UShort)i,
&platformID, &encodingID)))
my_tt_error(where,"TT_Get_CharMap_ID: ",res);
switch (platformID*100+encodingID)
{
case 301: /* M$: unicode */
case 300: /* M$: unicode (?) */
ihas=30;
break;
case 202: /* ISO: iso-8859-1 */
ihas=20;
break;
default:
ihas = 1;
break;
}
if (ihas>got)
{
best=i;
got=ihas;
}
}
if (got==-1)
Pike_error("%s: no charmaps at all\n",where);
if ((res=TT_Get_CharMap(face, (TT_UShort)best, charMap)))
my_tt_error(where,"TT_Get_CharMap: ",res);
}
TTF_Font *TTF_OpenFont(const char *file, int ptsize)
{
TTF_Font *font;
TT_Face_Properties properties;
TT_Instance_Metrics imetrics;
int i, n;
TT_UShort platform, encoding;
TT_Error error;
font = (TTF_Font *)malloc(sizeof(*font));
if ( font == NULL ) {
SDL_SetError("Out of memory");
return(NULL);
}
memset(font, 0, sizeof(*font));
/* Open the font and create ancillary data */
error = TT_Open_Face(engine, file, &font->face);
if ( error ) {
SDL_SetError("Couldn't load font file");
free(font);
return(NULL);
}
error = TT_New_Glyph(font->face, &font->glyph);
if ( error ) {
SDL_SetError("Couldn't create glyph container");
TTF_CloseFont(font);
return(NULL);
}
error = TT_New_Instance(font->face, &font->inst);
if ( error ) {
SDL_SetError("Couldn't create font instance");
TTF_CloseFont(font);
return(NULL);
}
/* Set the display resolution */
error = TT_Set_Instance_Resolutions(font->inst, 72, 72);
if ( error ) {
SDL_SetError("Couldn't set font resolution");
TTF_CloseFont(font);
return(NULL);
}
error = TT_Set_Instance_CharSize(font->inst, ptsize*64);
if ( error ) {
SDL_SetError("Couldn't set font size");
TTF_CloseFont(font);
return(NULL);
}
/* Get a Unicode mapping for this font */
n = TT_Get_CharMap_Count(font->face);
for ( i=0; i<n; ++i ) {
TT_Get_CharMap_ID(font->face, i, &platform, &encoding);
if ( ((platform == TT_PLATFORM_MICROSOFT) &&
(encoding == TT_MS_ID_UNICODE_CS)) ||
((platform == TT_PLATFORM_APPLE_UNICODE) &&
(encoding == TT_APPLE_ID_DEFAULT)) ) {
TT_Get_CharMap(font->face, i, &font->map);
break;
}
}
if ( i == n ) {
SDL_SetError("Font doesn't have a Unicode mapping");
TTF_CloseFont(font);
return(NULL);
}
/* Get the font metrics for this font */
TT_Get_Face_Properties(font->face, &properties );
TT_Get_Instance_Metrics(font->inst, &imetrics);
font->pointsize = imetrics.y_ppem;
font->ascent = (float)properties.horizontal->Ascender /
properties.header->Units_Per_EM;
font->ascent *= font->pointsize;
font->descent = (float)properties.horizontal->Descender /
properties.header->Units_Per_EM;
font->descent *= font->pointsize;
font->lineskip = (float)properties.horizontal->Line_Gap /
properties.header->Units_Per_EM;
font->lineskip *= font->pointsize;
font->height = round(font->ascent - font->descent);
/* Set the default font style */
font->style = TTF_STYLE_NORMAL;
font->glyph_overhang = font->pointsize/10;
/* x offset = cos(((90.0-12)/360)*2*M_PI), or 12 degree angle */
font->glyph_italics = 0.207;
font->glyph_italics *= font->height;
return(font);
}
