Module sdl2::gfx::imagefilter

MMX image filters

Functions

abs_diff	Filter using AbsDiff: D = | S1 - S2 |.
add	Filter using Add: D = saturation255(S1 + S2).
add_byte	Filter using AddByte: D = saturation255(S + C).
add_byte_to_half	Filter using AddByteToHalf: D = saturation255(S/2 + C).
add_uint	Filter using AddUint: D = saturation255((S[i] + Cs[i % 4]), Cs=Swap32((uint)C).
binarize_using_threshold	Filter using BinarizeUsingThreshold: D = (S >= T) ? 255:0.
bit_and	Filter using BitAnd: D = S1 & S2.
bit_negation	Filter using BitNegation: D = !S.
bit_or	Filter using BitOr: D = S1 | S2.
clip_to_range	Filter using ClipToRange: D = (S >= Tmin) & (S <= Tmax) S:Tmin | Tmax.
div	Filter using Div: D = S1 / S2.
mean	Filter using Mean: D = S1/2 + S2/2.
mmx_detect	MMX detection routine (with override flag).
mmx_off	Disable MMX check for filter functions and and force to use non-MMX C based code.
mmx_on	Enable MMX check for filter functions and use MMX code if available.
mult	Filter using Mult: D = saturation255(S1 * S2).
mult_by_byte	Filter using MultByByte: D = saturation255(S * C).
mult_div_by2	Filter using MultDivby2: D = saturation255(S1/2 * S2).
mult_div_by4	Filter using MultDivby4: D = saturation255(S1/2 * S2/2).
mult_nor	Filter using MultNor: D = S1 * S2.
normalize_linear	Filter using NormalizeLinear: D = saturation255((Nmax - Nmin)/(Cmax - Cmin)*(S - Cmin) + Nmin).
shift_left	Filter ShiftLeft: D = saturation255(S << N).
shift_left_byte	Filter using ShiftLeftByte: D = (S << N).
shift_left_uint	Filter using ShiftLeftUint: D = ((uint)S << N).
shift_right	Filter using ShiftRight: D = saturation0(S >> N).
shift_right_and_mult_by_byte	Filter using ShiftRightAndMultByByte: D = saturation255((S >> N) * C).
shift_right_uint	Filter using ShiftRightUint: D = saturation0((uint)S[i] >> N).
sub	Filter using Sub: D = saturation0(S1 - S2).
sub_byte	Filter using SubByte: D = saturation0(S - C).
sub_uint	Filter using SubUint: D = saturation0(S[i] - Cs[i % 4]), Cs=Swap32((uint)C).