Glifi e metriche dei caratteri TrueType | .NET

Ottieni metriche di carattere

Le metriche dei caratteri contengono informazioni come Ascender, Descender, TypoAscender, TypoDescender e UnitsPerEm. Aspose.Font per API .NET può leggere le informazioni sulle metriche del carattere dal file font TrueType utilizzando il seguente codice di esempio.

 1// For complete examples and data files, please go to https://github.com/aspose-font/Aspose.Font-for-.NET
 2string fileName = dataDir + "Montserrat-Regular.ttf"; //Font file name with full path
 3
 4FontDefinition fd = new FontDefinition(FontType.TTF, new FontFileDefinition("ttf", new FileSystemStreamSource(fileName)));
 5TtfFont font = Aspose.Font.Font.Open(fd) as TtfFont;
 6
 7string name = font.FontName;
 8Console.WriteLine("Font name: " + name);
 9Console.WriteLine("Glyph count: " + font.NumGlyphs);
10string metrics = string.Format(
11    "Font metrics: ascender - {0}, descender - {1}, typo ascender = {2}, typo descender = {3}, UnitsPerEm = {4}",
12    font.Metrics.Ascender, font.Metrics.Descender,
13    font.Metrics.TypoAscender, font.Metrics.TypoDescender, font.Metrics.UnitsPerEM);
14
15Console.WriteLine(metrics);
16
17//Get cmap unicode encoding table from font as object TtfCMapFormatBaseTable to access information about font glyph for symbol 'A'.
18//Also check that font has object TtfGlyfTable (table 'glyf') to access glyph.
19Aspose.Font.TtfCMapFormats.TtfCMapFormatBaseTable cmapTable = null;
20if (font.TtfTables.CMapTable != null)
21{
22    cmapTable = font.TtfTables.CMapTable.FindUnicodeTable();
23}
24if (cmapTable != null && font.TtfTables.GlyfTable != null)
25{
26    Console.WriteLine("Font cmap unicode table: PlatformID = " + cmapTable.PlatformId + ", PlatformSpecificID = " + cmapTable.PlatformSpecificId);
27
28    //Code for 'A' symbol
29    char unicode = (char)65;
30
31    //Glyph index for 'A'
32    uint glIndex = cmapTable.GetGlyphIndex(unicode);
33
34    if (glIndex != 0)
35    {
36        //Glyph for 'A'
37        Glyph glyph = font.GetGlyphById(glIndex);
38        if (glyph != null)
39        {
40            //Print glyph metrics
41            Console.WriteLine("Glyph metrics for 'A' symbol:");
42            string bbox = string.Format(
43                "Glyph BBox: Xmin = {0}, Xmax = {1}" + ", Ymin = {2}, Ymax = {3}",
44                glyph.GlyphBBox.XMin, glyph.GlyphBBox.XMax,
45                glyph.GlyphBBox.YMin, glyph.GlyphBBox.YMax);
46            Console.WriteLine(bbox);
47            Console.WriteLine("Width:" + font.Metrics.GetGlyphWidth(new GlyphUInt32Id(glIndex)));
48        }
49    }
50}

Rileva i simboli latini

Aspose.Font per .NET ti consente di rilevare i simboli latini dai file di carattere TrueType. Questo può essere ottenuto utilizzando il seguente codice di esempio.

 1// For complete examples and data files, please go to https://github.com/aspose-font/Aspose.Font-for-.NET
 2string fileName = dataDir + "Montserrat-Regular.ttf"; //Font file name with full path
 3
 4FontDefinition fd = new FontDefinition(FontType.TTF, new FontFileDefinition("ttf", new FileSystemStreamSource(fileName)));
 5TtfFont ttfFont = Aspose.Font.Font.Open(fd) as TtfFont;
 6
 7bool latinText = true;
 8
 9
10for (uint code = 65; code < 123; code++)
11{
12    GlyphId gid = ttfFont.Encoding.DecodeToGid(code);
13    if (gid == null || gid == GlyphUInt32Id.NotDefId)
14    {
15        latinText = false;
16    }
17}
18
19if (latinText)
20{
21    Console.WriteLine(string.Format("Font {0} supports latin symbols.", ttfFont.FontName));
22}
23else
24{
25    Console.WriteLine(string.Format("Latin symbols are not supported by font {0}.", ttfFont.FontName));
26}

Estrai restrizioni di licenza

Usa Aspose.Font per .NET API per estrarre le restrizioni di licenza dai file di carattere. I caratteri possono avere informazioni sulle licenze incorporate in queste in una delle seguenti modalità.

Il seguente campione di codice mostra come utilizzare un oggetto Aspose.Font.TTF.LICENSEFLAGS per ottenere informazioni sulle restrizioni della licenza dei caratteri (flag fstype dalla tabella OS/2) in forma conveniente.

 1// For complete examples and data files, please go to https://github.com/aspose-font/Aspose.Font-for-.NET
 2string dataDir = RunExamples.GetDataDir_Data();
 3//Font to check
 4string fileName = dataDir + "Montserrat-Regular.ttf"; //Font file name with full path
 5
 6FontDefinition fd = new FontDefinition(FontType.TTF, new FontFileDefinition("ttf", new FileSystemStreamSource(fileName)));
 7TtfFont font = Aspose.Font.Font.Open(fd) as TtfFont;
 8LicenseFlags licenseFlags = null;
 9if (font.TtfTables.Os2Table != null)
10{
11    licenseFlags = font.TtfTables.Os2Table.GetLicenseFlags();
12}
13
14if (licenseFlags == null || licenseFlags.FSTypeAbsent)
15{
16    Console.WriteLine(string.Format("Font {0} has no embedded license restrictions", font.FontName));
17}
18else
19{
20    if (licenseFlags.IsEditableEmbedding)
21    {
22        Console.WriteLine(
23            string.Format("Font {0} may be embedded, and may be temporarily loaded on other systems.", font.FontName)
24            + " In addition, editing is permitted, including ability to format new text"
25            + " using the embedded font, and changes may be saved.");
26    }
27    else if (licenseFlags.IsInstallableEmbedding)
28    {
29        Console.WriteLine(
30            string.Format("Font {0} may be embedded, and may be permanently installed", font.FontName)
31            + " for use on a remote systems, or for use by other users.");
32    }
33    else if (licenseFlags.IsPreviewAndPrintEmbedding)
34    {
35        Console.WriteLine(
36            string.Format("Font {0} may be embedded, and may be temporarily loaded", font.FontName)
37            + "  on other systems for purposes of viewing or printing the document.");
38    }
39    else if (licenseFlags.IsRestrictedLicenseEmbedding)
40    {
41        Console.WriteLine(
42            string.Format("Font {0} must not be modified, embedded or exchanged in any manner", font.FontName)
43            + " without first obtaining explicit permission of the legal owner.");
44    }
45}

Have any questions about Aspose.Font?



Subscribe to Aspose Product Updates

Get monthly newsletters & offers directly delivered to your mailbox.