unit Unit1;interfaceusesWindows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,math,StdCtrls, ExtCtrls;typeTForm1 = class(TForm)Edit1: TEdit;Image1: TImage;bmprotate: TButton;Label1: TLabel;Panel1: TPanel;Image2: TImage;Panel2: TPanel;Image3: TImage;Edit2: TEdit;RotatedText: TButton;Label2: TLabel;procedure bmprotateClick(Sender: TObject);procedure RotatedTextClick(Sender: TObject);procedure FormCreate(Sender: TObject);private{ Private declarations }public{ Public declarations }procedure bmp_rotate(src,dst:Tbitmap;angle:extended);Procedure DrawRotatedText(TheCanvas : TCanvas; TheAngle : Integer;TheText : String);end;varForm1: TForm1;implementation{$R *.DFM}procedure TForm1.bmp_rotate(src,dst:Tbitmap;angle:extended);//圖像旋轉(zhuǎn)varc1x,c1y,c2x,c2y:integer;p1x,p1y,p2x,p2y:integer;radius,n:integer;alpha:extended;c0,c1,c2,c3:tcolor;beginangle := (angle / 180) * pi; //將文本框內(nèi)的內(nèi)容轉(zhuǎn)換角度c1x := src.Width div 2;c1y := src.Height div 2;c2x := dst.Width div 2;c2y := dst.Height div 2;if c2x < c2y thenn := c2yelsen := c2x;dec (n,1); //使n 值減少1,n:=n-1for p2x := 0 to n do beginfor p2y := 0 to n do beginif p2x = 0 thenalpha:= pi/2elsealpha := arctan2(p2y,p2x);radius := round(sqrt((p2x*p2x)+(p2y*p2y)));//設(shè)置旋轉(zhuǎn)時的半徑大小p1x := round(radius * cos(angle+alpha)); //設(shè)置旋轉(zhuǎn)時的圓心橫坐標p1y := round(radius * sin(angle+alpha)); //設(shè)置旋轉(zhuǎn)時的圓心縱坐標c0 := src.Canvas.pixels[c1x+p1x,c1y+p1y];//替換圖像相關(guān)坐標處的像素c1 := src.Canvas.pixels[c1x-p1x,c1y-p1y];c2 := src.Canvas.pixels[c1x+p1y,c1y-p1x];c3 := src.Canvas.pixels[c1x-p1y,c1y+p1x];dst.Canvas.pixels[c2x+p2x,c2y+p2y]:=c0; //置換不同位置的像素點dst.Canvas.pixels[c2x-p2x,c2y-p2y]:=c1;dst.Canvas.pixels[c2x+p2y,c2y-p2x]:=c2;dst.Canvas.pixels[c2x-p2y,c2y+p2x]:=c3;end;application.processmessages //響應(yīng)其他的消息請求end;end;procedure TForm1.bmprotateClick(Sender: TObject);VarRAngle : Extended;beginRAngle := StrToFloat(Edit1.Text); //設(shè)置旋轉(zhuǎn)的角度bmp_rotate(Image1.Picture.bitmap,Image2.Picture.bitmap, RAngle);//運行旋轉(zhuǎn)函數(shù)，旋轉(zhuǎn)圖形end;Procedure TForm1.DrawRotatedText(TheCanvas : TCanvas; TheAngle : Integer;TheText : String);varlf : TLogFont;tf : TFont;beginImage3.Canvas.refresh;with TheCanvas do beginFont.Name:='Arial';Font.Size:=18;Brush.Style:= bsClear;tf:= TFont.Create;trytf.Assign(Font);GetObject(tf.Handle, Sizeof(lf), @lf); //將當前實例句柄賦給tf 這個Font 對象lf.lfEscapement:=TheAngle*10;lf.lfOrientation := TheAngle * 10; //使輸入時的橫坐標線與水平線呈所指定的角度tf.Handle := CreateFontIndirect(lf); //創(chuàng)建一個Font 具體對象Font.Assign(tf); //使這個對象運用到程序中finallytf.Free; //釋放對象end;TextOut(Image3.left, Image3.top+20 , TheText); //繪制文本到指定區(qū)域end;end;procedure TForm1.RotatedTextClick(Sender: TObject);VarTheAngle : Integer;beginTheAngle := StrToInt(Edit2.Text); //將文本框中的文本轉(zhuǎn)換角度DrawRotatedText(Image3.Canvas, TheAngle, 'Delphi圖形工作室'); //調(diào)用旋轉(zhuǎn)文本函數(shù)end;procedure TForm1.FormCreate(Sender: TObject);vartf : TFont;theText:string;begintheText:='Delphi圖形工作室'; //設(shè)置文本with Image3.Canvas dobeginFont.Name := 'Arial'; //設(shè)置字體Font.Size := 18; //設(shè)置字體大小Brush.Style := bsClear; //設(shè)置筆刷樣式tf:= TFont.Create; //創(chuàng)建一個Font 具體對象TextOut(Image3.left, Image3.top+20 , TheText); //繪制文本到指定區(qū)域end;end;end.