DelphiѹËõͼƬ´úÂë
Ìí¼ÓÒýÓãºuses JPEG;
//=====================ͼƬ´¦Àíº¯Êý£¬½«¸²¸ÇÔͼƬÎļþ===========================
//=====filename:ͼƬÍêÕû·¾¶ PressQuality:ѹËõÖÊÁ¿ Width:¿í Height:¸ß
function CompressMainFun(filename: String; PressQuality,Width,Height:integer): Boolean;
var
bmp: TBitmap;
jpg: TJpegImage;
i: Integer;
sTemp:string;
begin
Result := False;
if pos(UpperCase('.bmp'), UpperCase(filename)) <> 0 then //bmp¸ñʽ
begin
bmp.LoadfromFile(filename);
jpg.Assign(bmp);
jpg.CompressionQuality := PressQuality;
jpg.Compress;
bmp.height := Height;
bmp.Width := Width;
bmp.Canvas.StretchDraw(bmp.Canvas.ClipRect, jpg);
jpg.Assign(bmp);
sTemp := filename + '.jpg';
jpg.SaveToFile(sTemp);
DeleteFile(filename);
CopyFile(PChar(sTemp), PChar(filename), True);
DeleteFile(sTemp);
end
else //ÆäËü¸ñʽ
begin
jpg.LoadfromFile(filename);
bmp.height := Height;
bmp.Width := Width;
bmp.Canvas.StretchDraw(bmp.Canvas.ClipRect, jpg);
jpg.Assign(bmp);
&nb
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Perform($000B, 0, 0); //ËøÆÁÄ» ·ÀÖ¹ÉÁ˸
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Perform($000B, 1, 0);
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