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