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Spara en websida som en JPEG-fil
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Kategori: Grafik
Inlagt: 2005-03-17
Läst: 1319
Inlagt av: Staffan Berg
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Beskrivning |
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Detta exempel demonstrerar hur du genom en TWebBrowser kan spara ned en websida som en bild i jpg-format.
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Kod |
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procedure GenerateJPEGfromBrowser(browser: iWebBrowser2; jpegFQFilename: string ; srcHeight: integer; srcWidth: integer; tarHeight: integer; tarWidth: integer);var sourceDrawRect: TRect; targetDrawRect: TRect; sourceBitmap : TBitmap; targetBitmap : TBitmap; aJPG : TJPEGImage; aViewObject : IViewObject;begin // GenerateJPEGfromBrowser sourceBitmap := TBitmap.Create; targetBitmap := TBitmap.Create; aJPG := TJPEGImage.Create; try try sourceDrawRect := Rect(0, 0, srcWidth, srcHeight); sourceBitmap.Width := srcWidth; sourceBitmap.Height := srcHeight; aViewObject := browser as IViewObject; if aViewObject=nil then Exit; OleCheck(aViewObject.Draw(DVASPECT_CONTENT, 1, nil, nil, Form1.Handle, sourceBitmap.Canvas.Handle, @sourceDrawRect, nil, nil, 0)); // Resize the src bitmap to the target bitmap // Need to make thumbnails instead of full size? // set the target size here.. targetDrawRect := Rect(0, 0, tarWidth, tarHeight); targetBitmap.Height := tarHeight; targetBitmap.Width := tarWidth; targetBitmap.Canvas.StretchDraw(targetDrawRect, sourceBitmap); // Create a JPEG from the Bitmap and save it aJPG.Assign(targetBitmap); aJPG.SaveToFile(jpegFQFilename) finally aJPG.Free; sourceBitmap.Free; targetBitmap.Free end; { try } except // error handler code end; // tryend; // GenerateJPEGfromBrowser procedure TForm1.Button2Click(Sender: TObject);var IDoc1: IHTMLDocument2; Web : iWebBrowser2; tmpX, tmpY : integer;begin // TForm1.Button2Click with WebBrowser1 do begin Document.QueryInterface(IHTMLDocument2, IDoc1); Web := ControlInterface; tmpX := Height; tmpY := Width; Height := OleObject.Document.ParentWindow.Screen.Height; Width := OleObject.Document.ParentWindow.Screen.Width; GenerateJPEGfromBrowser(Web, '.\test.jpg', Height, Width, Height, Width); Height := tmpX; Width := tmpY; Image1.Picture.LoadFromFile('.\test.jpg') end; // with WebBrowser1 end; // TForm1.Button2Click
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