Introduction to the 'fc-query' Command

Introduction to the command The `fc-query` command is a powerful tool for manipulating font files and extracting information from them. It is part of the FreeType library, an open-source library for handling fonts in applications. With `fc-query`, you can inspect font files, extract information from them, and even generate font metrics. Basic usage and syntax The basic syntax for `fc-query` is `fc-query [options]`. The `font-file` argument is the path to the font file you want to query. The `options` argument is a list of options and flags you can use to customize the query. Examples of common use cases One common use of `fc-query` is to extract font metrics such as the font's ascender, descender, and line gap. You can do this using the `-f` flag with the `metrics` argument. Another common use is to extract information about the font's character set, such as the number of glyphs, the range of Unicode characters, and the script used. This can be done using the `-f` flag with the `charset` argument. Advanced options and flags The `fc-query` command has a number of advanced options and flags that allow you to customize the query. For example, the `-v` flag enables verbose output, which prints detailed information about the font file. The `-s` flag allows you to specify a script, which limits the output to glyphs from that script. The `-l` flag allows you to specify a language, which limits the output to glyphs from that language. Examples in real-world scenarios The `fc-query` command can be used in a variety of real-world scenarios. For example, it can be used to inspect a font file before installing it, to ensure that it contains the desired glyphs and characters. It can also be used to generate font metrics for use in a layout application, or to extract information about the font's character set for use in a text editor. Troubleshooting tips and potential errors When using `fc-query`, it is important to ensure that the font file is valid and that the options and flags you specify are valid. If you encounter an error, try using the `-v` flag to get more detailed information about the error. If the font file is corrupted or invalid, try using the `-t` flag to test the font file and ensure it is valid.

Introduction to the command

The fc-query command is a powerful tool for manipulating font files and extracting information from them. It is part of the FreeType library, an open-source library for handling fonts in applications. With fc-query, you can inspect font files, extract information from them, and even generate font metrics.

Basic usage and syntax

The basic syntax for fc-query is fc-query <font-file> [options]. The font-file argument is the path to the font file you want to query. The options argument is a list of options and flags you can use to customize the query.

Examples of common use cases

One common use of fc-query is to extract font metrics such as the font's ascender, descender, and line gap. You can do this using the -f flag with the metrics argument. Another common use is to extract information about the font's character set, such as the number of glyphs, the range of Unicode characters, and the script used. This can be done using the -f flag with the charset argument.

Advanced options and flags

The fc-query command has a number of advanced options and flags that allow you to customize the query. For example, the -v flag enables verbose output, which prints detailed information about the font file. The -s flag allows you to specify a script, which limits the output to glyphs from that script. The -l flag allows you to specify a language, which limits the output to glyphs from that language.

Examples in real-world scenarios

The fc-query command can be used in a variety of real-world scenarios. For example, it can be used to inspect a font file before installing it, to ensure that it contains the desired glyphs and characters. It can also be used to generate font metrics for use in a layout application, or to extract information about the font's character set for use in a text editor.

Troubleshooting tips and potential errors

When using fc-query, it is important to ensure that the font file is valid and that the options and flags you specify are valid. If you encounter an error, try using the -v flag to get more detailed information about the error. If the font file is corrupted or invalid, try using the -t flag to test the font file and ensure it is valid.