Class: Quartz::ImageSource

Inherits:
Object
  • Object
show all
Defined in:
lib/rubyquartz/image_source.rb,
ext/image_source.c

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ ImageSource

Returns a new instance of ImageSource.



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# File 'lib/rubyquartz/image_source.rb', line 29

def initialize(options)
  path = options[:path]
  if path
    _initialize_with_path(path)
    return
  end
  
  
  if data = options[:data]
    _initialize_with_data(data)
    return
  end
  
  # TODO: Add various other creation types
  raise "Cannot determine how to create image from given options"
end

Class Method Details

.name_for_type_identifier(type_value) ⇒ Object 



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# File 'ext/image_source.c', line 94

static VALUE image_source_name_for_type_identifier(VALUE self, VALUE type_value)
{
  CFStringRef type = _copy_string_for_str(type_value);
  CFStringRef name = UTTypeCopyDescription(type);
  CFRelease(type);
  
  if (!name)
    rb_raise(rb_eException, "No name available for type");
    
  VALUE result = _value_for_string(name);
  CFRelease(name);
  return result;
}

.type_identifiers ⇒ Object 



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# File 'ext/image_source.c', line 77

static VALUE image_source_get_type_identifiers(VALUE self)
{
  CFArrayRef typeIdentifiers = CGImageSourceCopyTypeIdentifiers();
  CFIndex typeIdentifierIndex = CFArrayGetCount(typeIdentifiers);
  
  VALUE strings = rb_ary_new();
  while (typeIdentifierIndex--) {
    CFStringRef typeIdentifier = CFArrayGetValueAtIndex(typeIdentifiers, typeIdentifierIndex);
    VALUE str = _value_for_string(typeIdentifier);
    rb_ary_unshift(strings, str);
  }
  
  CFRelease(typeIdentifiers);
  
  return strings;
}

Instance Method Details

#[](index) ⇒ Object 



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# File 'lib/rubyquartz/image_source.rb', line 46

def[](index)
  Image.new(:image_source => self, :index => index)
end

#size ⇒ Object 



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# File 'ext/image_source.c', line 113

static VALUE image_source_get_count(VALUE self)
{
  return INT2NUM(CGImageSourceGetCount(image_source_get(self)));
}

#type ⇒ Object 



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# File 'ext/image_source.c', line 108

static VALUE image_source_get_type(VALUE self)
{
  return _value_for_string(CGImageSourceGetType(image_source_get(self)));
}