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fg_blend()
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Computes an alpha-blended color value.
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fg_blend50()
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Computes a 50% alpha-blended color value.
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fg_blenddcb()
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Computes an alpha-blended direct color bitmap with constant opacity.
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fg_blendvar()
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Computes an alpha-blended direct color bitmap with variable opacity.
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fg_blendvb()
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Creates alpha-blended image with constant opacity in the active virtual buffer.
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fg_blendvbv()
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Creates alpha-blended image with variable opacity in the active virtual buffer.
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fg_contdcb()
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Applies a contrast enhancement transform to a direct color bitmap.
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fg_contrgb()
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Applies a contrast enhancement transform to a series of RGB color triples.
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fg_contvb()
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Applies a contrast enhancement transform to a rectangular region of the active virtual buffer.
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fg_gammadcb()
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Applies a gamma correction transform to a direct color bitmap.
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fg_gammargb()
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Applies a gamma correction transform to a series of RGB color triples.
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fg_gammavb()
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Applies a gamma correction transform to a rectangular region of the active virtual buffer.
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fg_graydcb()
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Applies a grayscale transform to a direct color bitmap.
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fg_grayrgb()
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Applies a grayscale transform to a series of RGB color triples.
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fg_grayvb()
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Applies a grayscale transform to a rectangular region of the active virtual buffer.
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fg_opacity()
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Defines the foreground opacity for the alpha blending functions.
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fg_photodcb()
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Applies a photo-inversion transform to a direct color bitmap.
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fg_photorgb()
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Applies a photo-inversion transform to a series of RGB color triples.
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fg_photovb()
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Applies a photo-inversion transform to a rectangular region of the active virtual buffer.
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