BlendMode = enum
  NormalBlend, DarkenBlend, MultiplyBlend, ColorBurnBlend, LightenBlend,
  ScreenBlend, ColorDodgeBlend, OverlayBlend, SoftLightBlend, HardLightBlend,
  DifferenceBlend, ExclusionBlend, HueBlend, SaturationBlend, ColorBlend,
  LuminosityBlend, MaskBlend, ## Special blend mode that is used for masking
  OverwriteBlend,           ## Special blend mode that just copies pixels
  SubtractMaskBlend,        ## Inverse mask
  ExcludeMaskBlend

ImageDimensions = object
  width*, height*: int

PixieError = object of ValueError

proc mix(a, b: ColorRGBX; t: float32): ColorRGBX {.inline, ...raises: [], tags: [].}

proc mix(a, b: uint8; t: float32): uint8 {.inline, ...raises: [], tags: [].}

proc snapToPixels(rect: Rect): Rect {....raises: [], tags: [].}