along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <cstdio>
+#include "international.hh"
#include "modified-font-metric.hh"
#include "open-type-font.hh"
+#include "freetype.hh"
+
+#ifdef FT_FONT_FORMATS_H
+/* FreeType 2.6+ */
+#include FT_FONT_FORMATS_H
+#else
+/* FreeType 2.5.5 and earlier */
+#include FT_XFREE86_H
+#define FT_Get_Font_Format FT_Get_X11_Font_Format
+#endif
LY_DEFINE (ly_font_sub_fonts, "ly:font-sub-fonts", 1, 0, 0,
(SCM font),
return otf->glyph_list ();
}
+
+LY_DEFINE (ly_get_font_format, "ly:get-font-format",
+ 1, 1, 0, (SCM font_file_name, SCM idx),
+ "Get the font format for @var{font_file_name},"
+ " returning it as a symbol. The optional"
+ " @var{idx} argument is useful for TrueType Collections (TTC) and"
+ " OpenType/CFF collections (OTC) only;"
+ " it specifies the font index within the TTC/OTC."
+ " The default value of @var{idx} is@tie{}0.")
+{
+ LY_ASSERT_TYPE (scm_is_string, font_file_name, 1);
+
+ int i = 0;
+ if (!SCM_UNBNDP (idx))
+ {
+ LY_ASSERT_TYPE (scm_is_integer, idx, 2);
+ i = scm_to_int (idx);
+ if (i < 0)
+ {
+ warning (_ ("font index must be non-negative, using index 0"));
+ i = 0;
+ }
+ }
+
+ string file_name = ly_scm2string (font_file_name);
+
+ FT_Face face;
+ /* check whether font index is valid */
+ if (i > 0)
+ {
+ face = open_ft_face (file_name, -1);
+ if (i >= face->num_faces)
+ {
+ warning (_f ("font index %d too large for font `%s', using index 0",
+ i, file_name.c_str ()));
+ i = 0;
+ }
+ FT_Done_Face (face);
+ }
+
+ face = open_ft_face (file_name, i);
+ SCM asscm = scm_from_ascii_symbol (FT_Get_Font_Format (face));
+ FT_Done_Face (face);
+
+ return asscm;
+}
+
+LY_DEFINE (ly_has_glyph_names_p, "ly:has-glyph-names?",
+ 1, 1, 0, (SCM font_file_name, SCM idx),
+ "Does the font for @var{font_file_name} have glyph names?"
+ " The optional @var{idx} argument is useful for"
+ " TrueType Collections (TTC) and"
+ " OpenType/CFF collections (OTC) only;"
+ " it specifies the font index within the TTC/OTC."
+ " The default value of @var{idx} is@tie{}0.")
+{
+ LY_ASSERT_TYPE (scm_is_string, font_file_name, 1);
+
+ int i = 0;
+ if (!SCM_UNBNDP (idx))
+ {
+ LY_ASSERT_TYPE (scm_is_integer, idx, 2);
+ i = scm_to_int (idx);
+ if (i < 0)
+ {
+ warning (_ ("font index must be non-negative, using index 0"));
+ i = 0;
+ }
+ }
+
+ string file_name = ly_scm2string (font_file_name);
+
+ FT_Face face;
+ /* check whether font index is valid */
+ if (i > 0)
+ {
+ face = open_ft_face (file_name, -1);
+ if (i >= face->num_faces)
+ {
+ warning (_f ("font index %d too large for font `%s', using index 0",
+ i, file_name.c_str ()));
+ i = 0;
+ }
+ FT_Done_Face (face);
+ }
+
+ face = open_ft_face (file_name, i);
+ bool has_glyph_names = FT_HAS_GLYPH_NAMES(face);
+ FT_Done_Face (face);
+
+ return has_glyph_names ? SCM_BOOL_T : SCM_BOOL_F;
+}
+
+LY_DEFINE (ly_get_cff_offset, "ly:get-cff-offset",
+ 1, 1, 0, (SCM font_file_name, SCM idx),
+ "Get the offset of 'CFF' table for @var{font_file_name},"
+ " returning it as an integer. The optional"
+ " @var{idx} argument is useful for"
+ " OpenType/CFF collections (OTC) only;"
+ " it specifies the font index within the OTC."
+ " The default value of @var{idx} is@tie{}0.")
+{
+ LY_ASSERT_TYPE (scm_is_string, font_file_name, 1);
+
+ int i = 0;
+ if (!SCM_UNBNDP (idx))
+ {
+ LY_ASSERT_TYPE (scm_is_integer, idx, 2);
+ i = scm_to_int (idx);
+ if (i < 0)
+ {
+ warning (_ ("font index must be non-negative, using index 0"));
+ i = 0;
+ }
+ }
+
+ string file_name = ly_scm2string (font_file_name);
+
+ FILE *fp = fopen (file_name.c_str (), "rb");
+ if (!fp)
+ {
+ warning (_f ("cannot open font filename `%s'", file_name.c_str ()));
+ return SCM_BOOL_F;
+ }
+
+ char buff[4];
+
+ // Read `sfnt version` (for OTF) or `TTCTag` (for OTC)
+ if (fread (buff, 4, 1, fp) != 1)
+ {
+ fclose (fp);
+ warning (_f ("cannot read %s of `%s'", "header", file_name.c_str ()));
+ return SCM_BOOL_F;
+ }
+
+ if (buff[0] == 't' && buff[1] == 't' && buff[2] == 'c' && buff[3] == 'f')
+ {
+ // For OTC
+ // Find subfont
+
+ // Skip `Version`
+ fseek (fp, 4, SEEK_CUR);
+
+ // Read `numFonts`
+ if (fread (buff, 4, 1, fp) != 1)
+ {
+ fclose (fp);
+ warning (_f ("cannot read %s of `%s'",
+ "numFonts", file_name.c_str ()));
+ return SCM_BOOL_F;
+ }
+ int numfonts =
+ static_cast<unsigned char>(buff[0]) << 24 |
+ static_cast<unsigned char>(buff[1]) << 16 |
+ static_cast<unsigned char>(buff[2]) << 8 |
+ static_cast<unsigned char>(buff[3]);
+
+ if ( i > numfonts )
+ {
+ warning (_f ("font index %d too large for font `%s', using index 0",
+ i, file_name.c_str ()));
+ i = 0;
+ }
+
+ // Read `OffsetTable[i]`
+ if (i)
+ fseek (fp, i * 4, SEEK_CUR);
+ if (fread (buff, 4, 1, fp) != 1)
+ {
+ fclose (fp);
+ warning (_f ("cannot read %s of `%s'",
+ "OffsetTable", file_name.c_str ()));
+ return SCM_BOOL_F;
+ }
+ unsigned int offset =
+ static_cast<unsigned char>(buff[0]) << 24 |
+ static_cast<unsigned char>(buff[1]) << 16 |
+ static_cast<unsigned char>(buff[2]) << 8 |
+ static_cast<unsigned char>(buff[3]);
+
+ // Seek to subfont and skip `sfnt version`
+ fseek (fp, offset + 4, SEEK_SET);
+ }
+
+ // For OTF or subfont of OTC
+
+ // Read `numTables`
+ if (fread (buff, 2, 1, fp) != 1)
+ {
+ fclose (fp);
+ warning (_f ("cannot read %s of `%s'",
+ "numTables", file_name.c_str ()));
+ return SCM_BOOL_F;
+ }
+ int numtables =
+ static_cast<unsigned char>(buff[0]) << 8 |
+ static_cast<unsigned char>(buff[1]);
+
+ // Skip `searchRange`, `entrySelector` and `rangeShift`
+ fseek (fp, 6, SEEK_CUR);
+
+ // Read Table Records
+ for (int t = 0; t < numtables; t++)
+ {
+ // Read `tag`
+ if (fread (buff, 4, 1, fp) != 1)
+ {
+ fclose (fp);
+ warning (_f ("cannot read %s of `%s'",
+ "tag", file_name.c_str ()));
+ return SCM_BOOL_F;
+ }
+
+ if (buff[0] == 'C' && buff[1] == 'F' && buff[2] == 'F' && buff[3] == ' ')
+ {
+ // CFF table is found.
+
+ // Skip `checkSum`
+ fseek (fp, 4, SEEK_CUR);
+
+ // Read `offset`
+ if (fread (buff, 4, 1, fp) != 1)
+ {
+ fclose (fp);
+ warning (_f ("cannot read %s of `%s'",
+ "CFF offset", file_name.c_str ()));
+ return SCM_BOOL_F;
+ }
+ unsigned int offset =
+ static_cast<unsigned char>(buff[0]) << 24 |
+ static_cast<unsigned char>(buff[1]) << 16 |
+ static_cast<unsigned char>(buff[2]) << 8 |
+ static_cast<unsigned char>(buff[3]);
+
+ // Done
+ fclose (fp);
+ return scm_from_unsigned_integer (offset);
+ }
+
+ // For non-CFF table
+
+ // Skip `checkSum`, `offset` and `length`
+ fseek (fp, 12, SEEK_CUR);
+ }
+
+ fclose (fp);
+ warning (_f ("font `%s' index %d does not have `CFF' table",
+ file_name.c_str (), i));
+ return SCM_BOOL_F;
+}
projects / lilypond.git / blobdiff