Detect Latin Symbols Support in Fonts using C#

DetectLatinSymbolsInFonts_CSharp.md

Learn how to detect Latin symbols support in fonts using C#: https://blog.aspose.com/2022/04/27/detect-latin-symbols-support-in-truetype-or-type1-fonts-using-csharp/

The following topics are covered in this article:

1. C# API to Detect Latin Symbols Support in Fonts
2. Detect Latin Symbols in TrueType Fonts using C#
3. Detect Latin Symbols in Type1 Fonts using C#

DetectLatinSymbolsInFonts_CSharp_DetectInTTF.cs

// This code example demonstrates how to detect if a particular TrueType font supports Latin symbols or not.
// TTF file path
string fontPath = @"D:\Files\font\Montserrat-Regular.ttf";

// Load the font file
FontFileDefinition fontFileDefinition = new FontFileDefinition("ttf", new FileSystemStreamSource(fontPath));

// Font definition object
FontDefinition fd = new FontDefinition(FontType.TTF, fontFileDefinition);

// Open the font
TtfFont font = (TtfFont)Font.Open(fd);

var latinText = true;

// Check for the support of latin symbols
for (uint code = 65; code < 123; code++)
{
    GlyphId gid = font.Encoding.DecodeToGid(code);
    if (gid == null || gid == GlyphUInt32Id.NotDefId)
    {
        latinText = false;
    }
}

if (latinText)
{
    Console.WriteLine("Font {0} supports latin symbols.", font.FontName);
}
else
{
    Console.WriteLine("Latin symbols are not supported by font {0}.", font.FontName);
}

DetectLatinSymbolsInFonts_CSharp_DetectInType1.cs

// This code example demonstrates how to detect if a particular Type1 font supports Latin symbols or not.
// Type1 font file path
string fontPath = @"D:\Files\font\courier.pfb";

// Load the font file
FontFileDefinition fontFileDefinition = new FontFileDefinition("pfb", new FileSystemStreamSource(fontPath));

// Font definition object
FontDefinition fd = new FontDefinition(FontType.Type1, fontFileDefinition);

// Open the font
Type1Font font = (Type1Font)Font.Open(fd);

var latinText = true;

// Check for the support of latin symbols
for (uint code = 65; code < 123; code++)
{
    GlyphId gid = font.Encoding.DecodeToGid(code);
    if (gid == null || gid == GlyphUInt32Id.NotDefId)
    {
        latinText = false;
    }
}

if (latinText)
{
    Console.WriteLine("Font {0} supports latin symbols.", font.FontName);
}
else
{
    Console.WriteLine("Latin symbols are not supported by font {0}.", font.FontName);
}