1a71788eeb
* add const to string parameter git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@1698 8e941d3f-bd1b-0410-a28a-d453659cc2b4
537 lines
16 KiB
ObjectPascal
537 lines
16 KiB
ObjectPascal
unit SpkGraphTools;
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{$mode ObjFpc}
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{$H+}
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{$DEFINE SPKGRAPHTOOLS}
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interface
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uses
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LCLIntf, Graphics, LCLType, Classes, Math, Sysutils, Dialogs, SpkMath;
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const
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NUM_ZERO = 0.00000001;
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(*******************************************************************************
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* *
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* Proste struktury *
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* *
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*******************************************************************************)
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type
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// WskaŸnik do tablicy TRGBTriple
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PRGBTripleArray = ^TRGBTripleArray;
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// Tablica TRGBTriple (u¿ywana podczas operacji ze ScanLine)
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TRGBTripleArray = array[word] of TRGBTriple;
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THSLTriple = record
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H, S, L : extended;
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end;
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// Rodzaj gradientu
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TGradientType = (gtVertical, gtHorizontal);
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// Rodzaj linii gradientowej (miejsce rozmycia)
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TGradientLineShade = (lsShadeStart, lsShadeEnds, lsShadeCenter, lsShadeEnd);
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// Rodzaj linii gradientowej (wypuk³oœæ)
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TGradient3dLine = (glRaised, glLowered);
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(*******************************************************************************
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* *
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* Klasy narzêdziowe *
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* *
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*******************************************************************************)
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TColorTools = class
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public
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class function Darken(kolor : TColor; percentage : byte) : TColor;
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class function Brighten(kolor : TColor; percentage : byte) : TColor;
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class function Shade(kol1,kol2 : TColor; percentage : byte) : TColor; overload;
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class function Shade(kol1,kol2 : TColor; Step : extended) : TColor; overload;
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class function AddColors(c1, c2 : TColor) : TColor;
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class function MultiplyColors(c1, c2 : TColor) : TColor;
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class function MultiplyColor(color : TColor; scalar : integer) : TColor; overload;
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class function MultiplyColor(color : TColor; scalar : extended) : TColor; overload;
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class function percent(min, pos, max : integer) : byte;
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class function RGB2HSL(ARGB : TRGBTriple) : THSLTriple;
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class function HSL2RGB(AHSL : THSLTriple) : TRGBTriple;
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class function RgbTripleToColor(ARgbTriple : TRGBTriple) : TColor;
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class function ColorToRgbTriple(AColor : TColor) : TRGBTriple;
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class function ColorToGrayscale(AColor : TColor) : TColor;
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end;
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TGradientTools = class
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public
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class procedure HGradient(canvas : TCanvas; cStart,cEnd : TColor; rect : T2DIntRect); overload;
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class procedure HGradient(canvas : TCanvas; cStart,cEnd : TColor; p1, p2 : TPoint); overload;
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class procedure HGradient(canvas : TCanvas; cStart,cEnd : TColor; x1,y1,x2,y2 : integer); overload;
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class procedure VGradient(canvas : TCanvas; cStart,cEnd : TColor; rect : T2DIntRect); overload;
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class procedure VGradient(canvas : TCanvas; cStart,cEnd : TColor; p1, p2 : TPoint); overload;
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class procedure VGradient(canvas : TCanvas; cStart,cEnd : TColor; x1,y1,x2,y2 : integer); overload;
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class procedure Gradient(canvas : TCanvas; cStart,cEnd : TColor; rect : T2DIntRect; GradientType : TGradientType); overload;
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class procedure Gradient(canvas : TCanvas; cStart,cEnd : TColor; p1, p2 : TPoint; GradientType : TGradientType); overload;
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class procedure Gradient(canvas : TCanvas; cStart,cEnd : TColor; x1,y1,x2,y2 : integer; GradientType : TGradientType); overload;
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class procedure HGradientLine(canvas : TCanvas; cBase, cShade : TColor; x1, x2 , y : integer; ShadeMode : TGradientLineShade);
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class procedure VGradientLine(canvas : TCanvas; cBase, cShade : TColor; x, y1 , y2 : integer; ShadeMode : TGradientLineShade);
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class procedure HGradient3dLine(canvas : TCanvas; x1,x2,y : integer; ShadeMode : TGradientLineShade; A3dKind : TGradient3dLine = glLowered);
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class procedure VGradient3dLine(canvas : TCanvas; x,y1,y2 : integer; ShadeMode : TGradientLineShade; A3dKind : TGradient3dLine = glLowered);
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end;
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TTextTools = class
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public
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class procedure OutlinedText(Canvas : TCanvas; x, y : integer; const text : string);
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end;
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implementation
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{ TColorTools }
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class function TColorTools.Darken(kolor : TColor; percentage : byte) : TColor;
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var r,g,b : byte;
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begin
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r:=round(GetRValue(ColorToRGB(kolor))*(100-percentage)/100);
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g:=round(GetGValue(ColorToRGB(kolor))*(100-percentage)/100);
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b:=round(GetBValue(ColorToRGB(kolor))*(100-percentage)/100);
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result:=rgb(r,g,b);
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end;
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class function TColorTools.Brighten(kolor : TColor; percentage : byte) : TColor;
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var r,g,b : byte;
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begin
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r:=round(GetRValue(ColorToRGB(kolor))+( (255-GetRValue(ColorToRGB(kolor)))*(percentage/100) ));
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g:=round(GetGValue(ColorToRGB(kolor))+( (255-GetGValue(ColorToRGB(kolor)))*(percentage/100) ));
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b:=round(GetBValue(ColorToRGB(kolor))+( (255-GetBValue(ColorToRGB(kolor)))*(percentage/100) ));
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result:=rgb(r,g,b);
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end;
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class function TColorTools.Shade(kol1,kol2 : TColor; percentage : byte) : TColor;
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var r,g,b : byte;
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begin
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r:=round(GetRValue(ColorToRGB(kol1))+( (GetRValue(ColorToRGB(kol2))-GetRValue(ColorToRGB(kol1)))*(percentage/100) ));
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g:=round(GetGValue(ColorToRGB(kol1))+( (GetGValue(ColorToRGB(kol2))-GetGValue(ColorToRGB(kol1)))*(percentage/100) ));
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b:=round(GetBValue(ColorToRGB(kol1))+( (GetBValue(ColorToRGB(kol2))-GetBValue(ColorToRGB(kol1)))*(percentage/100) ));
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result:=rgb(r,g,b);
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end;
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class function TColorTools.Shade(kol1,kol2 : TColor; Step : extended) : TColor;
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var r,g,b : byte;
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begin
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r:=round(GetRValue(ColorToRGB(kol1))+( (GetRValue(ColorToRGB(kol2))-GetRValue(ColorToRGB(kol1)))*(Step) ));
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g:=round(GetGValue(ColorToRGB(kol1))+( (GetGValue(ColorToRGB(kol2))-GetGValue(ColorToRGB(kol1)))*(Step) ));
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b:=round(GetBValue(ColorToRGB(kol1))+( (GetBValue(ColorToRGB(kol2))-GetBValue(ColorToRGB(kol1)))*(Step) ));
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result:=rgb(r,g,b);
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end;
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class function TColorTools.AddColors(c1, c2 : TColor) : TColor;
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begin
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result:=rgb(max( 0,min( 255,GetRValue(c1)+GetRValue(c2) ) ),
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max( 0,min( 255,GetGValue(c1)+GetGValue(c2) ) ),
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max( 0,min( 255,GetBValue(c1)+GetBValue(c2) ) ));
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end;
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class function TColorTools.MultiplyColors(c1, c2 : TColor) : TColor;
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begin
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result:=rgb(max( 0,min( 255,GetRValue(c1)*GetRValue(c2) ) ),
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max( 0,min( 255,GetGValue(c1)*GetGValue(c2) ) ),
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max( 0,min( 255,GetBValue(c1)*GetBValue(c2) ) ));
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end;
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class function TColorTools.MultiplyColor(color : TColor; scalar : integer) : TColor;
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begin
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result:=rgb(max( 0,min( 255,GetRValue(color)*scalar ) ),
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max( 0,min( 255,GetGValue(color)*scalar ) ),
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max( 0,min( 255,GetBValue(color)*scalar ) ));
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end;
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class function TColorTools.MultiplyColor(color : TColor; scalar : extended) : TColor;
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begin
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result:=rgb(max( 0,min( 255,round(GetRValue(color)*scalar) ) ),
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max( 0,min( 255,round(GetGValue(color)*scalar) ) ),
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max( 0,min( 255,round(GetBValue(color)*scalar) ) ));
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end;
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class function TColorTools.Percent(min, pos, max : integer) : byte;
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begin
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if max=min then result:=max else
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result:=round((pos-min)*100/(max-min));
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end;
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{.$MESSAGE WARN 'Porównywanie liczb rzeczywistych? Trzeba poprawiæ'}
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class function TColorTools.RGB2HSL(ARGB : TRGBTriple) : THSLTriple;
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var RGBmin, RGBmax : extended;
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R, G, B : extended;
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H, S, L : extended;
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begin
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R:=ARGB.rgbtRed/255;
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G:=ARGB.rgbtGreen/255;
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B:=ARGB.rgbtBlue/255;
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RGBmin:=min(R,min(G,B));
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RGBmax:=max(R,min(G,B));
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H:=0;
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if RGBmax=RGBmin then
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begin
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// H jest nieoznaczone, ale przyjmijmy zero dla sensownoœci obliczeñ
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H:=0;
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end else
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if (R=RGBmax) and (G>=B) then
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begin
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H:=(pi/3)*((G-B)/(RGBmax-RGBmin))+0;
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end else
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if (R=RGBmax) and (G<B) then
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begin
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H:=(pi/3)*((G-B)/(RGBmax-RGBmin))+(2*pi);
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end else
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if (G=RGBmax) then
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begin
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H:=(pi/3)*((B-R)/(RGBmax-RGBmin))+(2*pi/3);
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end else
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if (B=RGBmax) then
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begin
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H:=(pi/3)*((R-G)/(RGBmax-RGBmin))+(4*pi/3);
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end;
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L:=(RGBmax+RGBmin)/2;
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S:=0;
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if (L<NUM_ZERO) or (rgbMin=rgbMax) then
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begin
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S:=0;
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end else
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if (L<=0.5) then
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begin
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S:=((RGBmax-RGBmin)/(2*L));
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end else
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if (L>0.5) then
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begin
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S:=((RGBmax-RGBmin)/(2-2*L));
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end;
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result.H:=H/(2*pi);
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result.S:=S;
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result.L:=L;
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end;
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class function TColorTools.HSL2RGB(AHSL : THSLTriple) : TRGBTriple;
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var R, G, B : extended;
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TR, TG, TB : extended;
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Q, P : extended;
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function ProcessColor(Tc : extended) : extended;
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begin
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if (Tc<(1/6)) then
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result:=P+((Q-P)*6.0*Tc) else
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if (Tc<(1/2)) then
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result:=Q else
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if (Tc<(2/3)) then
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result:=P+((Q-P)*((2/3)-Tc)*6.0) else
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result:=P;
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end;
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begin
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if AHSL.S<NUM_ZERO then
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begin
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R:=AHSL.L;
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G:=AHSL.L;
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B:=AHSL.L;
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end else
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begin
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if (AHSL.L<0.5) then
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Q:=AHSL.L*(AHSL.S+1.0) else
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Q:=AHSL.L+AHSL.S-(AHSL.L*AHSL.S);
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P:=2.0*AHSL.L-Q;
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TR:=AHSL.H+(1/3);
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TG:=AHSL.H;
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TB:=AHSL.H-(1/3);
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if (TR<0) then TR:=TR+1 else
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if (TR>1) then TR:=TR-1;
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if (TG<0) then TG:=TG+1 else
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if (TG>1) then TG:=TG-1;
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if (TB<0) then TB:=TB+1 else
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if (TB>1) then TB:=TB-1;
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R:=ProcessColor(TR);
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G:=ProcessColor(TG);
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B:=ProcessColor(TB);
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end;
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result.rgbtRed:=round(255*R);
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result.rgbtGreen:=round(255*G);
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result.rgbtBlue:=round(255*B);
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end;
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class function TColorTools.RgbTripleToColor(ARgbTriple : TRGBTriple) : TColor;
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begin
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result:=rgb(ARgbTriple.rgbtRed,ARgbTriple.rgbtGreen,ARgbTriple.rgbtBlue);
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end;
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class function TColorTools.ColorToGrayscale(AColor: TColor): TColor;
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var avg : byte;
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begin
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avg:=(GetRValue(Acolor) + GetGValue(AColor) + GetBValue(AColor)) div 3;
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result:=rgb(avg,avg,avg);
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end;
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class function TColorTools.ColorToRgbTriple(AColor : TColor) : TRGBTriple;
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begin
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result.rgbtRed:=GetRValue(AColor);
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result.rgbtGreen:=GetGValue(AColor);
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result.rgbtBlue:=GetBValue(AColor);
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end;
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{ TGradientTools }
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class procedure TGradientTools.HGradient(canvas : TCanvas; cStart,cEnd : TColor; rect : T2DIntRect);
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var vert : array[0..1] of TRIVERTEX;
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gRect : GRADIENTRECT;
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Col1,Col2 : TColor;
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begin
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Col1:=ColorToRGB(cStart);
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Col2:=ColorToRGB(cEnd);
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with vert[0] do
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begin
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x:=rect.left;
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y:=rect.top;
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Red:=GetRValue(Col1) shl 8;
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Green:=GetGValue(Col1) shl 8;
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Blue:=GetBValue(Col1) shl 8;
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Alpha:=0;
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end;
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with vert[1] do
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begin
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x:=rect.right;
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y:=rect.bottom;
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Red:=GetRValue(Col2) shl 8;
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Green:=GetGValue(Col2) shl 8;
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Blue:=GetBValue(Col2) shl 8;
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Alpha:=0;
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end;
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gRect.UpperLeft:=0;
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gRect.LowerRight:=1;
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GradientFill(canvas.Handle,@vert,2,@gRect,1,GRADIENT_FILL_RECT_H);
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end;
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class procedure TGradientTools.HGradient(canvas : TCanvas; cStart,cEnd : TColor; p1, p2 : TPoint);
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begin
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HGradient(canvas,cstart,cend,rect(p1.x,p1.y,p2.x,p2.y));
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end;
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class procedure TGradientTools.HGradient(canvas : TCanvas; cStart,cEnd : TColor; x1,y1,x2,y2 : integer);
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begin
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HGradient(canvas,cstart,cend,rect(x1,y1,x2,y2));
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end;
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class procedure TGradientTools.VGradient(canvas : TCanvas; cStart,cEnd : TColor; rect : T2DIntRect);
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var vert : array[0..1] of TRIVERTEX;
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gRect : GRADIENTRECT;
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Col1,Col2 : TColor;
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begin
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Col1:=ColorToRGB(cStart);
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Col2:=ColorToRGB(cEnd);
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with vert[0] do
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begin
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x:=rect.left;
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y:=rect.top;
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Red:=GetRValue(Col1) shl 8;
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Green:=GetGValue(Col1) shl 8;
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Blue:=GetBValue(Col1) shl 8;
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Alpha:=0;
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end;
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with vert[1] do
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begin
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x:=rect.right;
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y:=rect.bottom;
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Red:=GetRValue(Col2) shl 8;
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Green:=GetGValue(Col2) shl 8;
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Blue:=GetBValue(Col2) shl 8;
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Alpha:=0;
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end;
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gRect.UpperLeft:=0;
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gRect.LowerRight:=1;
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GradientFill(canvas.Handle,@vert,2,@gRect,1,GRADIENT_FILL_RECT_V);
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end;
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class procedure TGradientTools.VGradient(canvas : TCanvas; cStart,cEnd : TColor; p1, p2 : TPoint);
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begin
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VGradient(canvas,cstart,cend,rect(p1.x,p1.y,p2.x,p2.y));
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end;
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class procedure TGradientTools.VGradient(canvas : TCanvas; cStart,cEnd : TColor; x1,y1,x2,y2 : integer);
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begin
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VGradient(canvas,cstart,cend,rect(x1,y1,x2,y2));
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end;
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class procedure TGradientTools.Gradient(canvas : TCanvas; cStart,cEnd : TColor; rect : T2DIntRect; GradientType : TGradientType);
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begin
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if GradientType=gtVertical then VGradient(canvas, cStart, cEnd, rect) else
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HGradient(canvas, cStart, cEnd, rect);
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end;
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class procedure TGradientTools.Gradient(canvas : TCanvas; cStart,cEnd : TColor; p1, p2 : TPoint; GradientType : TGradientType);
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begin
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if GradientType=gtVertical then VGradient(canvas, cStart, cEnd, p1, p2) else
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HGradient(canvas, cStart, cEnd, p1, p2);
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end;
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class procedure TGradientTools.Gradient(canvas : TCanvas; cStart,cEnd : TColor; x1,y1,x2,y2 : integer; GradientType : TGradientType);
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begin
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if GradientType=gtVertical then VGradient(canvas, cStart, cEnd, x1, y1, x2, y2) else
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HGradient(canvas, cStart, cEnd, x1, y1, x2, y2);
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end;
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class procedure TGradientTools.HGradientLine(canvas : TCanvas; cBase, cShade : TColor; x1, x2 , y : integer; ShadeMode : TGradientLineShade);
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var i : integer;
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begin
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if x1=x2 then exit;
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if x1>x2 then
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begin
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i:=x1;
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x1:=x2;
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x2:=i;
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end;
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case ShadeMode of
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lsShadeStart : HGradient(canvas,cShade,cBase,rect(x1,y,x2,y+1));
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lsShadeEnds : begin
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i:=(x1+x2) div 2;
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HGradient(canvas,cShade,cBase,rect(x1,y,i,y+1));
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HGradient(canvas,cBase,cShade,rect(i,y,x2,y+1));
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end;
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lsShadeCenter : begin
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i:=(x1+x2) div 2;
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HGradient(canvas,cBase,cShade,rect(x1,y,i,y+1));
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HGradient(canvas,cShade,cBase,rect(i,y,x2,y+1));
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end;
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lsShadeEnd : HGradient(canvas,cBase,cShade,rect(x1,y,x2,y+1));
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end;
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end;
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class procedure TGradientTools.VGradientLine(canvas : TCanvas; cBase, cShade : TColor; x, y1 , y2 : integer; ShadeMode : TGradientLineShade);
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var i : integer;
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begin
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if y1=y2 then exit;
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if y1>y2 then
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begin
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i:=y1;
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y1:=y2;
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y2:=i;
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end;
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case ShadeMode of
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lsShadeStart : VGradient(canvas,cShade,cBase,rect(x,y1,x+1,y2));
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lsShadeEnds : begin
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i:=(y1+y2) div 2;
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VGradient(canvas,cShade,cBase,rect(x,y1,x+1,i));
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VGradient(canvas,cBase,cShade,rect(x,i,x+1,y2));
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end;
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lsShadeCenter : begin
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i:=(y1+y2) div 2;
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VGradient(canvas,cBase,cShade,rect(x,y1,x+1,i));
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VGradient(canvas,cShade,cBase,rect(x,i,x+1,y2));
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end;
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lsShadeEnd : VGradient(canvas,cBase,cShade,rect(x,y1,x+1,y2));
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end;
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end;
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class procedure TGradientTools.HGradient3dLine(canvas : TCanvas; x1,x2,y : integer; ShadeMode : TGradientLineShade; A3dKind : TGradient3dLine = glLowered);
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begin
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if A3dKind = glRaised then
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begin
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HGradientLine(canvas,clBtnHighlight,clBtnFace,x1,x2,y,ShadeMode);
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HGradientLine(canvas,clBtnShadow,clBtnFace,x1,x2,y+1,ShadeMode);
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end else
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begin
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HGradientLine(canvas,clBtnShadow,clBtnFace,x1,x2,y,ShadeMode);
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HGradientLine(canvas,clBtnHighlight,clBtnFace,x1,x2,y+1,ShadeMode);
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end;
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end;
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class procedure TGradientTools.VGradient3dLine(canvas : TCanvas; x,y1,y2 : integer; ShadeMode : TGradientLineShade; A3dKind : TGradient3dLine = glLowered);
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begin
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if A3dKind = glLowered then
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begin
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VGradientLine(canvas,clBtnFace,clBtnHighlight,x,y1,y2,ShadeMode);
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VGradientLine(canvas,clBtnFace,clBtnShadow,x+1,y1,y2,ShadeMode);
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end else
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begin
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VGradientLine(canvas,clBtnFace,clBtnShadow,x,y1,y2,ShadeMode);
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VGradientLine(canvas,clBtnFace,clBtnHighlight,x+1,y1,y2,ShadeMode);
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end;
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end;
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{ TTextTools }
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class procedure TTextTools.OutlinedText(Canvas : TCanvas; x, y : integer; const text : string);
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var TmpColor : TColor;
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TmpBrushStyle : TBrushStyle;
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begin
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TmpColor:=Canvas.Font.color;
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TmpBrushStyle:=Canvas.Brush.style;
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Canvas.brush.style:=bsClear;
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Canvas.font.color:=clBlack;
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Canvas.TextOut(x-1,y,text);
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Canvas.TextOut(x+1,y,text);
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Canvas.TextOut(x,y-1,text);
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Canvas.TextOut(x,y+1,text);
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Canvas.font.color:=TmpColor;
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Canvas.TextOut(x,y,text);
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Canvas.Brush.Style:=TmpBrushStyle;
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end;
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end.
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