part of sprites;

/// A texture represents a rectangular area of an image and is typically used to draw a sprite to the screen.
///
/// Normally you get a reference to a texture from a [SpriteSheet], but you can also create one from an [Image].
class Texture {
  /// The image that this texture is a part of.
  ///
  ///     var textureImage = myTexture.image;
  final Image image;

  /// The logical size of the texture, before being trimmed by the texture packer.
  ///
  ///     var textureSize = myTexture.size;
  final Size size;

  /// The name of the image acts as a tag when acquiring a reference to it.
  ///
  ///     myTexture.name = "new_texture_name";
  String name;

  /// The texture was rotated 90 degrees when being packed into a sprite sheet.
  ///
  ///     if (myTexture.rotated) drawRotated();
  final bool rotated;

  /// The texture was trimmed when being packed into a sprite sheet.
  ///
  ///     bool trimmed = myTexture.trimmed
  final bool trimmed;

  /// The frame of the trimmed texture inside the image.
  ///
  ///     Rect frame = myTexture.frame;
  final Rect frame;

  /// The offset and size of the trimmed texture inside the image.
  ///
  /// Position represents the offset from the logical [size], the size of the rect represents the size of the trimmed
  /// texture.
  ///
  ///     Rect spriteSourceSize = myTexture.spriteSourceSize;
  final Rect spriteSourceSize;

  /// The default pivot point for this texture. When creating a [Sprite] from the texture, this is the pivot point that
  /// will be used.
  ///
  ///     myTexture.pivot = new Point(0.5, 0.5);
  Point pivot;

  /// Creates a new texture from an [Image] object.
  ///
  ///     var myTexture = new Texture(myImage);
  Texture(Image image) :
    size = new Size(image.width.toDouble(), image.height.toDouble()),
    image = image,
    trimmed = false,
    rotated = false,
    frame = new Rect.fromLTRB(0.0, 0.0, image.width.toDouble(), image.height.toDouble()),
    spriteSourceSize = new Rect.fromLTRB(0.0, 0.0, image.width.toDouble(), image.height.toDouble()),
    pivot = new Point(0.5, 0.5);


  Texture._fromSpriteFrame(this.image, this.name, this.size, this.rotated, this.trimmed, this.frame,
                           this.spriteSourceSize, this.pivot) {
  }

//  Texture textureFromRect(Rect rect, [String name = null]) {
//    assert(rect != null);
//    Rect frame = new Rect.fromLTRB();
//    return new Texture._fromSpriteFrame(image, name, rect.size, false, false, );
//  }
}