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international font selection

I'm writing a Windows Forms application in C# which will run generally in a
Western environment; e.g., EN-US. I need to access a unicode font on the
user's system which is capable of displaying Japanese characters - often
there will be one or more of such fonts, but I don't know which ones by
name. If one does not exist, I need to default to a public domain font to be
included with the app.

How do I determine which fonts are available on the user's system, and if
they have the required characters? I could come up with a short list of
probable font name candidates, but is there a better way?

If there are any references to URLs which have discussed this, that would be
fine!

Thanks,

- Jim
Jul 19 '05 #1
3 2640
To determine which fonts are available, you can instantiate an
InstalledFontCo llection object and then read its Families property.
This will give you an array of FontFamily objects, and FontFamily.Name
gives you the font name.

I'm not sure how to detect which characters are available in a font,
though. I'd be surprised if there wasn't a way to do it, but I didn't
see it in a quick skim through the docs.
Jim Puls wrote:
I'm writing a Windows Forms application in C# which will run generally in a
Western environment; e.g., EN-US. I need to access a unicode font on the
user's system which is capable of displaying Japanese characters - often
there will be one or more of such fonts, but I don't know which ones by
name. If one does not exist, I need to default to a public domain font to be
included with the app.

How do I determine which fonts are available on the user's system, and if
they have the required characters? I could come up with a short list of
probable font name candidates, but is there a better way?

If there are any references to URLs which have discussed this, that would be
fine!

Thanks,

- Jim


Jul 19 '05 #2
Looking specifically for Japanese, you can base it on a font charset value
of 128?
--
MichKa [MS]

This posting is provided "AS IS" with
no warranties, and confers no rights.
"Joe White" <ip***@hotmail. com> wrote in message
news:3F******** ******@hotmail. com...
To determine which fonts are available, you can instantiate an
InstalledFontCo llection object and then read its Families property.
This will give you an array of FontFamily objects, and FontFamily.Name
gives you the font name.

I'm not sure how to detect which characters are available in a font,
though. I'd be surprised if there wasn't a way to do it, but I didn't
see it in a quick skim through the docs.
Jim Puls wrote:
I'm writing a Windows Forms application in C# which will run generally in a Western environment; e.g., EN-US. I need to access a unicode font on the
user's system which is capable of displaying Japanese characters - often
there will be one or more of such fonts, but I don't know which ones by
name. If one does not exist, I need to default to a public domain font to be included with the app.

How do I determine which fonts are available on the user's system, and if they have the required characters? I could come up with a short list of
probable font name candidates, but is there a better way?

If there are any references to URLs which have discussed this, that would be fine!

Thanks,

- Jim

Jul 19 '05 #3
Hi Jim,

There is a GDI API function GetGlyphIndices which will help you very much.
The function can be used to determine whether a glyph exists in a font.
Here is a demo below:

1. Add the class below into your project which is used to call the GDI
API function.

public class Win33
{
[DllImport("Gdi3 2.dll")]
public static extern IntPtr SelectObject(
IntPtr hdc, // handle to DC
IntPtr hgdiobj // handle to object
);
[DllImport("Gdi3 2.dll", CharSet=CharSet .Unicode)]
public static extern int GetGlyphIndices (
IntPtr hdc, // handle to DC
[MarshalAs(Unman agedType.LPWStr )]
string lpstr, // string to convert
int c, // number of characters in string
Int16[] pgi, // array of glyph indices
int fl // glyph options
);
}

2. In order to get the hdc easier, I hereby override the OnPaint()
function (as below). You may achieve your individual aim with your own
method.

protected override void
OnPaint(System. Windows.Forms.P aintEventArgs e)
{
FontFamily fontFamily = new FontFamily("Ari al");
Font font = new Font(
fontFamily,
14,
FontStyle.Regul ar,
GraphicsUnit.Po int);
System.IntPtr hd = e.Graphics.GetH dc();
Win33.SelectObj ect(hd,font.ToH font());
string str = "hello";
int count = str.Length;
Int16[] rtcode = new Int16[count];
Win33.GetGlyphI ndices(hd,str,c ount,rtcode,0xf fff);
e.Graphics.Rele aseHdc(hd);
}

If a certain char is not supported by the font, the
"rtcode"(as above) will return zero.
[INFO]
Here is a helpful link about glyph indices of font.:
http://support.microsoft.com/default...en-us%3B241020
Regards,

Peter Huang
=============
This posting is provided "AS IS" with no warranties, and confers no rights.

--------------------
From: "Jim Puls" <j.****@ieee.or g>
Subject: international font selection
Date: Mon, 30 Jun 2003 20:57:36 -0500
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I'm writing a Windows Forms application in C# which will run generally in a
Western environment; e.g., EN-US. I need to access a unicode font on the
user's system which is capable of displaying Japanese characters - often
there will be one or more of such fonts, but I don't know which ones by
name. If one does not exist, I need to default to a public domain font to beincluded with the app.

How do I determine which fonts are available on the user's system, and if
they have the required characters? I could come up with a short list of
probable font name candidates, but is there a better way?

If there are any references to URLs which have discussed this, that would befine!

Thanks,

- Jim


Jul 19 '05 #4

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