神马文学网Delphi屏幕截图技术实现d
来源：百度文库 编辑：神马文学网 时间：2024/04/26 22:55:01
procedure TForm1.SnapScreen(a,b,c,d:Integer); //任意区域截图,参数为截图坐标
var
bmpscreen:Tbitmap;
jpegscreen:Tjpegimage;
FullscreenCanvas:TCanvas;
dc:HDC;
sourceRect, destRect: TRect;
begin
try
dc:=getdc(0);
fullscreencanvas:=Tcanvas.Create;
fullscreencanvas.Handle:=dc;
bmpscreen:=Tbitmap.create;
bmpscreen.Width :=c-a;
bmpscreen.Height :=d-b;
sourcerect:=Rect(0,0,c-a ,d-b );
destrect:= Rect(a,b,c,d);
bmpscreen.Canvas.CopyRect(sourcerect,fullscreenCanvas,destrect);
jpegscreen:=Tjpegimage.Create ;
jpegscreen.Assign (bmpscreen);
jpegscreen.CompressionQuality:=100;
jpegscreen.SaveToFile(ExtractFilePath(ParamStr(0))+'tmp.jpg');
FullscreenCanvas.Free;
bmpscreen.Free;
jpegscreen.Free ;
ReleaseDC(0, DC);
except
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
SnapScreen(self.Left,self.Top,Self.Left+self.Width,Self.Top+self.Height); //截取当前活动窗口
SnapScreen(0,0,Screen.Width,Screen.Height); //截取全屏
end;