mirror of
https://github.com/moparisthebest/Simba
synced 2024-11-25 10:42:20 -05:00
340 lines
8.3 KiB
ObjectPascal
340 lines
8.3 KiB
ObjectPascal
{
|
|
This file is part of the Mufasa Macro Library (MML)
|
|
Copyright (c) 2009 by Raymond van Venetië and Merlijn Wajer
|
|
|
|
MML is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
MML is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with MML. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
See the file COPYING, included in this distribution,
|
|
for details about the copyright.
|
|
|
|
Colour Conversion Utilities for the Mufasa Macro Library
|
|
}
|
|
|
|
unit colour_conv;
|
|
|
|
{$mode objfpc}{$H+}
|
|
{$Inline on}
|
|
|
|
interface
|
|
|
|
uses
|
|
Classes, SysUtils,
|
|
Graphics, mufasatypes,
|
|
Math;
|
|
|
|
|
|
Function RGBtoColor(r,g,b : byte) : TColor; overload; inline;
|
|
Function RGBtoColor(r,g,b : integer) : TColor; overload; inline;
|
|
Procedure ColorToRGB(Color : integer;out r,g,b : byte); overload; inline;
|
|
Procedure ColorToRGB(Color : integer;out r,g,b : integer); overload; inline;
|
|
Procedure RGBToXYZ(R,G,B : byte;out x,y,z : Extended); inline;
|
|
Procedure XYZToRGB(X,Y,Z : Extended;out R,G,B: byte); inline;
|
|
Procedure RGBToHSL(RR,GG,BB : byte;out H,S,L : Extended); inline;
|
|
Procedure RGBToHSLNonFixed(RR,GG,BB : byte;out H,S,L : Extended); inline;
|
|
Procedure HSLtoRGB(H,S,L : extended;out R,G,B : Byte); inline;
|
|
Procedure ColorToHSL(Col: Integer; out h, s, l: Extended); inline;
|
|
procedure ColorToXYZ(color: Integer; out X, Y, Z: Extended); inline;
|
|
function XYZToColor(X, Y, Z: Extended): TColor; inline;
|
|
function HSLToColor(H, S, L: Extended): TColor; inline;
|
|
function BGRToRGB(BGR : TRGB32) : TColor;inline;
|
|
|
|
|
|
|
|
implementation
|
|
|
|
Const
|
|
OneDivThree = 1/3.0;
|
|
TwoDivThree = 2 / 3.0;
|
|
OneDivTwoPointFour = 1 / 2.4;
|
|
function BGRToRGB(BGR : TRGB32) : TColor;inline;
|
|
begin;
|
|
Result := BGR.R or BGR.g shl 8 or BGR.b shl 16;
|
|
end;
|
|
|
|
Function RGBtoColor(r,g,b : byte): TColor; overload; inline;
|
|
begin;
|
|
Result := R or g shl 8 or b shl 16;
|
|
end;
|
|
|
|
{/\
|
|
Translates the given Red (R), Green (G) and Blue (B) components to a TColor.
|
|
R, G and B are integers.
|
|
/\}
|
|
|
|
Function RGBtoColor(r,g,b : integer): TColor; overload; inline;
|
|
begin;
|
|
Result := R or g shl 8 or b shl 16;
|
|
end;
|
|
|
|
{/\
|
|
Translates the given win-32 color in the Red (R), Green (G) and Blue (B)
|
|
components. R, G and B are bytes.
|
|
/\}
|
|
|
|
Procedure ColorToRGB(Color : integer;out r,g,b : byte); overload; inline;
|
|
begin
|
|
R := Color and $ff;
|
|
G := Color shr 8 and $ff;
|
|
B := Color shr 16 and $ff;
|
|
end;
|
|
|
|
{/\
|
|
Translates the given win-32 color in the Red (R), Green (G) and Blue (B)
|
|
components. R, G and B are integers.
|
|
/\}
|
|
|
|
Procedure ColorToRGB(Color : integer;out r,g,b : integer); overload; inline;
|
|
begin
|
|
R := Color and $ff;
|
|
G := Color shr 8 and $ff;
|
|
B := Color shr 16 and $ff;
|
|
end;
|
|
|
|
{/\
|
|
Translates the given Red (R), Green (G) and Blue (B) components to
|
|
X, Y and Z components.
|
|
/\}
|
|
|
|
Procedure RGBToXYZ(R,G,B : byte;out x,y,z : Extended); inline;
|
|
var
|
|
Red,Green,Blue : Extended;
|
|
begin;
|
|
Red := R / 255;
|
|
Green := G / 255;
|
|
Blue := B / 255;
|
|
if Red > 0.04045 then
|
|
Red := Power( ( Red + 0.055 ) / 1.055 , 2.4) * 100
|
|
else
|
|
Red := Red / 7.73994;
|
|
if Green > 0.04045 then
|
|
Green := Power( ( Green + 0.055 ) / 1.055 , 2.4) * 100
|
|
else
|
|
Green := Green / 7.73994;
|
|
if Blue > 0.04045 then
|
|
Blue := Power( ( Blue + 0.055 ) / 1.055 , 2.4) * 100
|
|
else
|
|
Blue := Blue / 7.73994;
|
|
X := Red * 0.4124 + Green * 0.3576 + Blue * 0.1805;
|
|
Y := Red * 0.2126 + Green * 0.7152 + Blue * 0.0722;
|
|
Z := Red * 0.0193 + Green * 0.1192 + Blue * 0.9505;
|
|
end;
|
|
|
|
{/\
|
|
Translates the given X, Y and Z components to
|
|
Red (R), Green (G) and Blue (B) components.
|
|
/\}
|
|
|
|
Procedure XYZToRGB(X,Y,Z : Extended;out R,G,B: byte); inline;
|
|
var
|
|
TempR,TempG,TempB,Tempx,tempy,tempz : Extended;
|
|
begin;
|
|
Tempx := X / 100;
|
|
tempy := Y / 100;
|
|
tempz := Z / 100;
|
|
TempR := Tempx * 3.2406 + tempy * -1.5372 + tempz * -0.4986;
|
|
TempG := Tempx * -0.9689 + tempy * 1.8758 + tempz * 0.0415;
|
|
TempB := Tempx * 0.0557 + tempy * -0.2040 + tempz * 1.0570;
|
|
if TempR > 0.0031308 then
|
|
TempR := 1.055 * ( Power(TempR, (OneDivTwoPointFour)) ) - 0.055
|
|
else
|
|
TempR := 12.92 * TempR;
|
|
if TempG > 0.0031308 then
|
|
TempG := 1.055 * ( Power(TempG, ( OneDivTwoPointFour)) ) - 0.055
|
|
else
|
|
TempG := 12.92 * TempG;
|
|
if TempB > 0.0031308 then
|
|
TempB := 1.055 * ( Power(TempB , ( OneDivTwoPointFour )) ) - 0.055
|
|
else
|
|
TempB := 12.92 * TempB;
|
|
R := Round(TempR * 255);
|
|
G := Round(TempG * 255);
|
|
B := Round(TempB * 255);
|
|
end;
|
|
|
|
{/\
|
|
Translates the given Red (R), Green (G) and Blue (B) components to
|
|
H (Hue), S (Saturation) and L (Luminance) components.
|
|
/\}
|
|
|
|
Procedure RGBToHSL(RR,GG,BB : byte;out H,S,L : Extended); inline;
|
|
var
|
|
R, G, B, D, Cmax, Cmin: Extended;
|
|
begin
|
|
R := RR / 255;
|
|
G := GG / 255;
|
|
B := BB / 255;
|
|
CMin := R;
|
|
if G < Cmin then Cmin := G;
|
|
if B < Cmin then Cmin := B;
|
|
CMax := R;
|
|
if G > Cmax then Cmax := G;
|
|
if B > Cmax then Cmax := B;
|
|
L := 0.5 * (Cmax + Cmin);
|
|
if Cmax = Cmin then
|
|
begin
|
|
H := 0;
|
|
S := 0;
|
|
end else
|
|
begin;
|
|
D := Cmax - Cmin;
|
|
if L < 0.5 then
|
|
S := D / (Cmax + Cmin)
|
|
else
|
|
S := D / (2 - Cmax - Cmin);
|
|
if R = Cmax then
|
|
H := (G - B) / D
|
|
else
|
|
if G = Cmax then
|
|
H := 2 + (B - R) / D
|
|
else
|
|
H := 4 + (R - G) / D;
|
|
H := H / 6;
|
|
if H < 0 then
|
|
H := H + 1;
|
|
end;
|
|
H := H * 100;
|
|
S := S * 100;
|
|
L := L * 100;
|
|
end;
|
|
|
|
{/\
|
|
Translates the given Red (R), Green (G) and Blue (B) components to
|
|
H (Hue), S (Saturation) and L (Luminance) components.
|
|
This function does not multiply it by 100.
|
|
/\}
|
|
|
|
Procedure RGBToHSLNonFixed(RR,GG,BB : byte;out H,S,L : Extended); inline;
|
|
var
|
|
R, G, B, D, Cmax, Cmin: Extended;
|
|
begin
|
|
R := RR / 255;
|
|
G := GG / 255;
|
|
B := BB / 255;
|
|
CMin := R;
|
|
if G < Cmin then Cmin := G;
|
|
if B < Cmin then Cmin := B;
|
|
CMax := R;
|
|
if G > Cmax then Cmax := G;
|
|
if B > Cmax then Cmax := B;
|
|
L := 0.5 * (Cmax + Cmin);
|
|
if Cmax = Cmin then
|
|
begin
|
|
H := 0;
|
|
S := 0;
|
|
end else
|
|
begin;
|
|
D := Cmax - Cmin;
|
|
if L < 0.5 then
|
|
S := D / (Cmax + Cmin)
|
|
else
|
|
S := D / (2 - Cmax - Cmin);
|
|
if R = Cmax then
|
|
H := (G - B) / D
|
|
else
|
|
if G = Cmax then
|
|
H := 2 + (B - R) / D
|
|
else
|
|
H := 4 + (R - G) / D;
|
|
H := H / 6;
|
|
if H < 0 then
|
|
H := H + 1;
|
|
end;
|
|
end;
|
|
|
|
{/\
|
|
Translates the given H (Hue), S (Saturation) and L (Luminance) components to
|
|
Red (R), Green (G) and Blue (B) components.
|
|
/\}
|
|
|
|
procedure HSLtoRGB(H, S, L: extended; out R, G, B: Byte); inline;
|
|
var
|
|
Temp,Temp2 : Extended;
|
|
//begin
|
|
|
|
Function Hue2RGB(TempHue : Extended) : integer;
|
|
begin;
|
|
if TempHue < 0 then
|
|
TempHue := TempHue + 1
|
|
else if TempHue > 1 then
|
|
TempHue := TempHue - 1;
|
|
if ( ( 6 * TempHue ) < 1 ) then
|
|
Result :=Round(255 * (( Temp + ( Temp2 - Temp ) * 6 * TempHue )))
|
|
else if ( ( 2 * TempHue ) < 1 ) then
|
|
Result :=Round(255 * Temp2)
|
|
else if ( ( 3 * TempHue ) < 2 ) then
|
|
Result :=Round(255 * (Temp + ( Temp2 - Temp ) * ( ( TwoDivThree ) - TempHue ) * 6))
|
|
else
|
|
Result :=Round(255 * Temp);
|
|
end;
|
|
|
|
begin;
|
|
H := H / 100;
|
|
S := S / 100;
|
|
L := L / 100;
|
|
if s = 0 then
|
|
begin;
|
|
R := Byte(Round(L * 255));
|
|
G := R;
|
|
B := R;
|
|
end else
|
|
begin;
|
|
if (L < 0.5) then
|
|
Temp2 := L * ( 1 + S )
|
|
else
|
|
Temp2 := (L + S) - ( S * L);
|
|
Temp := 2 * L - Temp2;
|
|
R := Hue2RGB( H + ( OneDivThree ) );
|
|
G := Hue2RGB( H );
|
|
B := Hue2RGB( H - ( OneDivThree ) );
|
|
end;
|
|
end;
|
|
|
|
{/\
|
|
Split the Given Color col in H, S, L components.
|
|
/\}
|
|
|
|
Procedure ColorToHSL(Col: Integer; out h, s, l: Extended); inline;
|
|
Var
|
|
R, G, B: byte;
|
|
Begin
|
|
ColorToRGB(Col, R, G, B);
|
|
RGBToHSL(R, G, B, H, S, L);
|
|
End;
|
|
|
|
procedure ColorToXYZ(color: Integer; out X, Y, Z: Extended); inline;
|
|
var
|
|
R, G, B: byte;
|
|
begin
|
|
ColorToRGB(Color, R, G, B);
|
|
RGBToXYZ(R, G, B, X, Y, Z);
|
|
end;
|
|
|
|
function HSLToColor(H, S, L: Extended): TColor; inline;
|
|
var
|
|
r, g, b: byte;
|
|
begin
|
|
HSLToRGB(H, S, L, r, g, b);
|
|
Result := RGBToColor(r, g, b);
|
|
end;
|
|
|
|
function XYZToColor(X, Y, Z: Extended): TColor; inline;
|
|
var
|
|
r, g, b: byte;
|
|
begin
|
|
XYZToRGB(X, Y, Z, r, g, b);
|
|
Result := RGBToColor(r, g, b);
|
|
end;
|
|
|
|
end.
|