proc blendAlpha(backdrop, source: uint8): uint8 {.inline, ...raises: [], tags: [],
    forbids: [].}

proc blendColor(backdrop, source: ColorRGBX): ColorRGBX {....raises: [], tags: [],
    forbids: [].}

proc blendColorBurn(backdrop, source: ColorRGBX): ColorRGBX {....raises: [],
    tags: [], forbids: [].}

proc blendColorDodge(backdrop, source: ColorRGBX): ColorRGBX {....raises: [],
    tags: [], forbids: [].}

proc blendDarken(backdrop, source: ColorRGBX): ColorRGBX {.inline, ...raises: [],
    tags: [], forbids: [].}

proc blendDifference(backdrop, source: ColorRGBX): ColorRGBX {....raises: [],
    tags: [], forbids: [].}

proc blender(blendMode: BlendMode): Blender {....raises: [], tags: [], forbids: [].}

proc blendExcludeMask(backdrop, source: ColorRGBX): ColorRGBX {.inline,
    ...raises: [], tags: [], forbids: [].}

proc blendExclusion(backdrop, source: ColorRGBX): ColorRGBX {....raises: [],
    tags: [], forbids: [].}

proc blendHardLight(backdrop, source: ColorRGBX): ColorRGBX {....raises: [],
    tags: [], forbids: [].}

proc blendHue(backdrop, source: ColorRGBX): ColorRGBX {....raises: [], tags: [],
    forbids: [].}

proc blendLighten(backdrop, source: ColorRGBX): ColorRGBX {.inline, ...raises: [],
    tags: [], forbids: [].}

proc blendLuminosity(backdrop, source: ColorRGBX): ColorRGBX {....raises: [],
    tags: [], forbids: [].}

proc blendMask(backdrop, source: ColorRGBX): ColorRGBX {.inline, ...raises: [],
    tags: [], forbids: [].}

proc blendMultiply(backdrop, source: ColorRGBX): ColorRGBX {.inline, ...raises: [],
    tags: [], forbids: [].}

proc blendNormal(backdrop, source: ColorRGBX): ColorRGBX {.inline, ...raises: [],
    tags: [], forbids: [].}

proc blendOverlay(backdrop, source: ColorRGBX): ColorRGBX {....raises: [],
    tags: [], forbids: [].}

proc blendSaturation(backdrop, source: ColorRGBX): ColorRGBX {....raises: [],
    tags: [], forbids: [].}

proc blendScreen(backdrop, source: ColorRGBX): ColorRGBX {.inline, ...raises: [],
    tags: [], forbids: [].}

proc blendSoftLight(backdrop, source: ColorRGBX): ColorRGBX {....raises: [],
    tags: [], forbids: [].}

proc blendSubtractMask(backdrop, source: ColorRGBX): ColorRGBX {.inline,
    ...raises: [], tags: [], forbids: [].}