Class: Skia::Data

Inherits:
Base
  • Object
show all
Defined in:
lib/skia/data.rb

Instance Attribute Summary

Attributes inherited from Base

#ptr

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#null?, release_callback, #to_ptr

Constructor Details

#initialize(ptr_or_bytes = nil) ⇒ Data 



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# File 'lib/skia/data.rb', line 5

def initialize(ptr_or_bytes = nil)
  case ptr_or_bytes
  when FFI::Pointer
    super(ptr_or_bytes, :sk_data_unref)
  when String
    ptr = Native.sk_data_new_with_copy(ptr_or_bytes, ptr_or_bytes.bytesize)
    raise Error, 'Failed to create data from bytes' if ptr.nil? || ptr.null?

    super(ptr, :sk_data_unref)
  when nil
    raise ArgumentError, 'Data requires bytes or pointer'
  else
    raise ArgumentError, "Invalid argument type: #{ptr_or_bytes.class}"
  end
end

Class Method Details

.from_bytes(bytes) ⇒ Object 



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# File 'lib/skia/data.rb', line 28

def self.from_bytes(bytes)
  new(bytes)
end

.from_file(path) ⇒ Object

Raises:



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# File 'lib/skia/data.rb', line 21

def self.from_file(path)
  ptr = Native.sk_data_new_from_file(path)
  raise FileNotFoundError, "Failed to load file: #{path}" if ptr.nil? || ptr.null?

  new(ptr)
end

Instance Method Details

#empty? ⇒ Boolean 



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# File 'lib/skia/data.rb', line 36

def empty?
  size == 0
end

#size ⇒ Object 



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# File 'lib/skia/data.rb', line 32

def size
  Native.sk_data_get_size(@ptr)
end

#to_s ⇒ Object Also known as: to_bytes 



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# File 'lib/skia/data.rb', line 40

def to_s
  data_ptr = Native.sk_data_get_data(@ptr)
  data_ptr.read_bytes(size)
end