lazarus-ccr/components/spktoolbar/SpkGraphTools/SpkGraphTools.pas
blikblum 1a71788eeb * add mode objfpc
* add const to string parameter

git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@1698 8e941d3f-bd1b-0410-a28a-d453659cc2b4
2011-06-18 01:49:33 +00:00

537 lines
16 KiB
ObjectPascal

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