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Delphi常见图象格式转换技术

 2006-02-04 13:33:04 来源:WEB开发网   
核心提示:常见图象格式转换技术作者:lyboy99 e-mail:lyboy99@sina.com url: http://hnh.126.com给大家提供几个常用的图象格式转换方法和其转换函数希望可以对你有帮助1. ICO图标转换BMP格式2. 32x32 BMP格式图象转换为 ICO格式3.转换BMP->JPEG文件格

常见图象格式转换技术
作者:lyboy99
e-mail:lyboy99@sina.com 
url: http://hnh.126.com

给大家提供几个常用的图象格式转换方法和其转换函数
希望可以对你有帮助
1. ICO图标转换BMP格式
2. 32x32 BMP格式图象转换为 ICO格式
3.转换BMP->JPEG文件格式
4.JPEG 转换为BMP函数
5.Bmp转换为JPEG文件格式函数
-------------------------------------------------------------------------------------------------------------------------
1.Chinese : ICO图标转换BMP格式
English :(Conversion from ICO to BMP)
--------------------------------------------------------

  var
   Icon  : TIcon;
   Bitmap : TBitmap;
  begin
   Icon  := TIcon.Create;
   Bitmap := TBitmap.Create;
   Icon.LoadFromFile('c:picture.ico');
   Bitmap.Width := Icon.Width;
   Bitmap.Height := Icon.Height;
   Bitmap.Canvas.Draw(0, 0, Icon );
   Bitmap.SaveToFile('c:picture.bmp');
   Icon.Free;
   Bitmap.Free;
===================================
2.Chinese: 32x32 BMP格式图象转换为 ICO格式
English :32x32 bit Bitmaps to ICO's
-----------------------------------
unit main;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls,
  Forms,Dialogs,ExtCtrls, StdCtrls;

type
  TForm1 = class(TForm)
   Button1: TButton;
   Image1: TImage;
   Image2: TImage;
   PRocedure Button1Click(Sender: TObject);
   procedure FormCreate(Sender: TObject);
  private
   { Private declarations }
  public
   { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
var winDC, srcdc, destdc : HDC;
   oldBitmap : HBitmap;
   iinfo : TICONINFO;
begin
   GetIconInfo(Image1.Picture.Icon.Handle, iinfo);

   WinDC := getDC(handle);
   srcDC := CreateCompatibleDC(WinDC);
   destDC := CreateCompatibleDC(WinDC);
   oldBitmap := SelectObject(destDC, iinfo.hbmColor);
   oldBitmap := SelectObject(srcDC, iinfo.hbmMask);

   BitBlt(destdc, 0, 0, Image1.picture.icon.width,
   Image1.picture.icon.height,
      srcdc, 0, 0, SRCPAINT);
   Image2.picture.bitmap.handle := SelectObject(destDC, oldBitmap);
   DeleteDC(destDC);
   DeleteDC(srcDC);
   DeleteDC(WinDC);

 image2.Picture.Bitmap.savetofile(ExtractFilePath(application.ExeName)
      + 'myfile.bmp');
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  image1.picture.icon.loadfromfile('c:myicon.ico');
end;

end.
==================================================================
3. Chinese:转换BMP->JPEG文件格式
Englsh:convert the bitmap into a JPEG file format
------------------------------------------------------------------
var
  MyJpeg: TJpegImage;
  Image1: TImage;
begin
  Image1:= TImage.Create;
  MyJpeg:= TJpegImage.Create;
  Image1.LoadFromFile('TestImage.BMP');  // 读取Bitmap文件
  MyJpeg.Assign(Image1.Picture.Bitmap); 
object
  MyJpeg.SaveToFile('MyJPEGImage.JPG'); //保存JPEG
end;

--------------------------------------------------------------------
4.JPEG 转换为BMP函数

procedure Jpg2Bmp(const source,dest:string);
var
  MyJpeg: TJpegImage;
  bmp: Tbitmap;
begin
bmp:=tbitmap.Create;
MyJpeg:= TJpegImage.Create;
try
  myjpeg.LoadFromFile(source);
  bmp.Assign(myjpeg);
  bmp.SaveToFile(dest);
finally
  bmp.free;
  myjpeg.Free;
end;
end;

----------------------------------------------------------
5.Bmp转换为JPEG文件格式函数
----------------------------------------------------------
procedure Bmp2Jpg(const source,dest:string;const scale:byte);
var
  MyJpeg: TJpegImage;
  Image1: TImage;
begin
Image1:= TImage.Create(application);
MyJpeg:= TJpegImage.Create;
try
  Image1.Picture.Bitmap.LoadFromFile(source);
  MyJpeg.Assign(Image1.Picture.Bitmap);
  MyJpeg.CompressionQuality:=scale;
  MyJpeg.Compress;
  MyJpeg.SaveToFile(dest);
finally
  image1.free;
  myjpeg.Free;
end;
end;
-----------------------------------------------------------------------


Tags:Delphi 常见 图象

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