proc applyOpacity(color: M128; opacity: float32): ColorRGBX {.inline,
    ...raises: [], tags: [].}

proc applyOpacitySse2(image: Image; opacity: float32) {....raises: [], tags: [].}

proc blendLineCoverageMaskSse2(line: ptr UncheckedArray[ColorRGBX];
                               coverages: ptr UncheckedArray[uint8];
                               rgbx: ColorRGBX; len: int) {....raises: [], tags: [].}

proc blendLineCoverageNormalSse2(line: ptr UncheckedArray[ColorRGBX];
                                 coverages: ptr UncheckedArray[uint8];
                                 rgbx: ColorRGBX; len: int) {....raises: [],
    tags: [].}

proc blendLineCoverageOverwriteSse2(line: ptr UncheckedArray[ColorRGBX];
                                    coverages: ptr UncheckedArray[uint8];
                                    rgbx: ColorRGBX; len: int) {....raises: [],
    tags: [].}

proc blendLineMaskSse2(a, b: ptr UncheckedArray[ColorRGBX]; len: int) {.
    ...raises: [], tags: [].}

proc blendLineMaskSse2(line: ptr UncheckedArray[ColorRGBX]; rgbx: ColorRGBX;
                       len: int) {....raises: [], tags: [].}

proc blendLineNormalSse2(a, b: ptr UncheckedArray[ColorRGBX]; len: int) {.
    ...raises: [], tags: [].}

proc blendLineNormalSse2(line: ptr UncheckedArray[ColorRGBX]; rgbx: ColorRGBX;
                         len: int) {....raises: [], tags: [].}

proc ceilSse2(image: Image) {....raises: [], tags: [].}

proc fillUnsafeSse2(data: var seq[ColorRGBX]; color: SomeColor; start, len: int)

proc invertSse2(image: Image) {....raises: [], tags: [].}

proc isOneColorSse2(image: Image): bool {....raises: [], tags: [].}

proc isOpaqueSse2(data: var seq[ColorRGBX]; start, len: int): bool {....raises: [],
    tags: [].}

proc isTransparentSse2(image: Image): bool {....raises: [], tags: [].}

proc magnifyBy2Sse2(image: Image; power = 1): Image {....raises: [PixieError],
    tags: [].}

proc minifyBy2Sse2(image: Image; power = 1): Image {....raises: [PixieError],
    tags: [].}

proc toPremultipliedAlphaSse2(data: var seq[ColorRGBA | ColorRGBX])