Class: Ruby2D::Font

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby2d/font.rb

Constant Summary collapse

FONT_CACHE_LIMIT = 
100
@@loaded_fonts = 
{}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path, size, style = nil) ⇒ Font

Returns a new instance of Font.



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# File 'lib/ruby2d/font.rb', line 11

def initialize(path, size, style=nil)
  @ttf_font = Font.ext_load(path, size, style.to_s)
end

Instance Attribute Details

#ttf_font ⇒ Object (readonly)

Returns the value of attribute ttf_font.



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# File 'lib/ruby2d/font.rb', line 9

def ttf_font
  @ttf_font
end

Class Method Details

.all ⇒ Object

List all fonts, names only



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# File 'lib/ruby2d/font.rb', line 29

def all
  all_paths.map { |path| path.split('/').last.chomp('.ttf').downcase }.uniq.sort
end

.all_paths ⇒ Object

Get all fonts with full file paths



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# File 'lib/ruby2d/font.rb', line 39

def all_paths
  # MRuby does not have `Dir` defined
  if RUBY_ENGINE == 'mruby'
    fonts = `find #{directory} -name *.ttf`.split("\n")
  # If MRI and/or non-Bash shell (like cmd.exe)
  else
    fonts = Dir["#{directory}/**/*.ttf"]
  end

  fonts = fonts.reject do |f|
    f.downcase.include?('bold')    ||
    f.downcase.include?('italic')  ||
    f.downcase.include?('oblique') ||
    f.downcase.include?('narrow')  ||
    f.downcase.include?('black')
  end

  fonts.sort_by { |f| f.downcase.chomp '.ttf' }
end

.default ⇒ Object

Get the default font



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# File 'lib/ruby2d/font.rb', line 60

def default
  if all.include? 'arial'
    path 'arial'
  else
    all_paths.first
  end
end

.directory ⇒ Object

Get the fonts directory for the current platform



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# File 'lib/ruby2d/font.rb', line 69

def directory
  macos_font_path   = '/Library/Fonts'
  linux_font_path   = '/usr/share/fonts'
  windows_font_path = 'C:/Windows/Fonts'
  openbsd_font_path = '/usr/X11R6/lib/X11/fonts'

  # If MRI and/or non-Bash shell (like cmd.exe)
  if Object.const_defined? :RUBY_PLATFORM
    case RUBY_PLATFORM
    when /darwin/  # macOS
      macos_font_path
    when /linux/
      linux_font_path
    when /mingw/
      windows_font_path
    when /openbsd/
      openbsd_font_path
    end
  # If MRuby
  else
    uname = `uname`
    if uname.include? 'Darwin'  # macOS
      macos_font_path
    elsif uname.include? 'Linux'
      linux_font_path
    elsif uname.include? 'MINGW'
      windows_font_path
    elsif uname.include? 'OpenBSD'
      openbsd_font_path
    end
  end
end

.load(path, size, style = nil) ⇒ Object 



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# File 'lib/ruby2d/font.rb', line 16

def load(path, size, style=nil)
  unless File.exist? path
    raise Error, "Cannot find font file `#{path}`"
  end

  (@@loaded_fonts[[path, size, style]] ||= Font.new(path, size, style)).tap do |font|
    if @@loaded_fonts.size > FONT_CACHE_LIMIT
      @@loaded_fonts.shift
    end
  end
end

.path(font_name) ⇒ Object

Find a font file path from its name



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# File 'lib/ruby2d/font.rb', line 34

def path(font_name)
  all_paths.find { |path| path.downcase.include?(font_name) }
end