检查字体是否支持某些字符 [英] Checking if certain characters are supported by a font

问题描述

我发现这在StackOverflow上：有没有一种方法来确定一个字体文件是否具有特定的Unicode字形？

但是，我还需要检查UTF-32字符。我想要做的是在unicode.org解析Unihan数据，并忽略Arial Unicode MS不支持的所有字符。我开始在CheckIfCharInFont（）方法上工作，通过修改arg来取一个字符串（对于utf-32）并检查它是否是代理对。然后我通过做一个char.ConvertToUtf32（surrogate1，surrogate2）得到Int32，但问题是目前的CheckIfCharInFont（）方法只支持Uint16 ...你可以看到我在哪里放置了一个Debugger.Break，这是一个有点的问题。有什么专家可以帮我把这件事情搞清楚吗？
$ b pre

pre $ code> public static bool CheckIfCharInFont（string character，Font font）
{
UInt16 value = 0;
int temp = 0;
if（character.Length> 1）// UTF-32
{
temp = char.ConvertToUtf32（character [0]，character [1]）;
}
else
{
temp =（int）character [0];


if（temp> UInt16.MaxValue）
{
Debugger.Break（）;
返回false;
}
value =（UInt16）temp;

// UInt16 value = Convert.ToUInt16（character）;
List< FontRange> ranges = GetUnicodeRangesForFont（font）;
bool isCharacterPresent = false;
foreach（字符范围在范围内）
{
if（value> = range.Low&& value< = range.High）
{
isCharacterPresent = true;
break;
}
}
返回isCharacterPresent;

解决方案

自己的东西。也许从规格开始（ http://www.microsoft.com/typography/otspec/cmap .htm ）

这是这个工具的功能： http://mihai-nita.net/2007/09/08/charmapex-some-kind-of-character-map/

I found this on StackOverflow: Is there a way to programmatically determine if a font file has a specific Unicode Glyph?

However, I need to also check UTF-32 characters. What I am trying to do is parse the Unihan data over at unicode.org and ignore all characters that are not supported by "Arial Unicode MS". I started work on the CheckIfCharInFont() method by modifying the arg to take a string (for utf-32) and checking if it is a surrogare pair. I then get the Int32 by doing a char.ConvertToUtf32(surrogate1, surrogate2), but the problem is the current CheckIfCharInFont() method only supports Uint16... you can see where I placed a "Debugger.Break" that this is a bit of a problem. Any experts out there that can help me figure this thing out?

Thanks

public static bool CheckIfCharInFont(string character, Font font)
        {
            UInt16 value = 0;
            int temp = 0;
            if (character.Length > 1) //UTF-32
            {
                temp = char.ConvertToUtf32(character[0], character[1]);
            }
            else
            {
                temp = (int)character[0];
            }

            if (temp > UInt16.MaxValue)
            {
                Debugger.Break();
                return false;
            }
            value = (UInt16)temp;

            //UInt16 value = Convert.ToUInt16(character);
            List<FontRange> ranges = GetUnicodeRangesForFont(font);
            bool isCharacterPresent = false;
            foreach (FontRange range in ranges)
            {
                if (value >= range.Low && value <= range.High)
                {
                    isCharacterPresent = true;
                    break;
                }
            }
            return isCharacterPresent;
        }

解决方案

You would have to do your own thing. Maybe starting from the specs (http://www.microsoft.com/typography/otspec/cmap.htm)

It is what this tool does: http://mihai-nita.net/2007/09/08/charmapex-some-kind-of-character-map/

这篇关于检查字体是否支持某些字符的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！