首页 > 代码库 > 太有用了，所以转：Delphi下16进制位图数据转位图
太有用了，所以转：Delphi下16进制位图数据转位图
如果我们在Form中拖入一个Image控件，并设置好picture后，Alt+F12就可以看到Form的源代码中已经将图片转成了16进制字符串，如下：
object Image1: TImage Left = 536 Top = 24 Width = 105 Height = 105 Picture.Data = { 07544269746D61703E040000424D3E0400000000000036000000280000000700 00002B000000010018000000000008040000C40E0000C40E0000000000000000 0001BBE7F4BCE8F5BDE9F6BBE7F4BDE9F6BFEBF8BEEAF7000000B0E9F2B0E9F2 B0E9F2B0E9F2B1EAF3B2EBF4B1EAF3000000ADE5F8ADE5F8ACE4F7ADE5F8ACE4 F7AAE2F5ABE3F60000009DE4F89DE4F89DE4F89DE4F89DE4F89DE4F89DE4F800 00009DE4F89DE4F89DE4F89DE4F89DE4F89DE4F89DE4F80000009BE4F89BE4F8 9BE4F89BE4F89BE4F89BE4F89BE4F80000009BE4F89BE4F89BE4F89BE4F89BE4 F89BE4F89BE4F80000009BE4F89BE4F89BE4F89BE4F89BE4F89BE4F89BE4F800 00009EE5F99EE5F99EE5F99EE5F99EE5F99EE5F99EE5F9000000A0E5F9A0E5F9 A0E5F9A0E5F9A0E5F9A0E5F9A0E5F9000000A1E4F9A1E4F9A1E4F9A1E4F9A1E4 F9A1E4F9A1E4F9000000A1E6F9A1E6F9A1E6F9A1E6F9A1E6F9A1E6F9A1E6F900 0000A2E6F9A2E6F9A2E6F9A2E6F9A2E6F9A2E6F9A2E6F9000000A2E6F9A2E6F9 A2E6F9A2E6F9A2E6F9A2E6F9A2E6F9000000A5E6FBA5E6FBA5E6FBA5E6FBA5E6 FBA5E6FBA5E6FB000000A8E7FBA8E7FBA8E7FBA8E7FBA8E7FBA8E7FBA8E7FB00 0000AAE7FBAAE7FBAAE7FBAAE7FBAAE7FBAAE7FBAAE7FB000000AAE8FAAAE8FA AAE8FAAAE8FAAAE8FAAAE8FAAAE8FA000000ABE9F9ABE9F9ABE9F9ABE9F9ABE9 F9ABE9F9ABE9F9000000AEE9F9AEE9F9AEE9F9AEE9F9AEE9F9AEE9F9AEE9F900 0000B1E9FAB1E9FAB1E9FAB1E9FAB1E9FAB1E9FAB1E9FA000000B1E9FAB1E9FA B1E9FAB1E9FAB1E9FAB1E9FAB1E9FA000000B4EAFBB4EAFBB4EAFBB4EAFBB4EA FBB4EAFBB4EAFB000000B7EBFBB7EBFBB7EBFBB7EBFBB7EBFBB7EBFBB7EBFB00 0000B9ECFCB9ECFCB9ECFCB9ECFCB9ECFCB9ECFCB9ECFC000000B9ECFCB9ECFC B9ECFCB9ECFCB9ECFCB9ECFCB9ECFC000000B9ECFCB9ECFCB9ECFCB9ECFCB9EC FCB9ECFCB9ECFC000000C0EDFBC0EDFBC0EDFBC0EDFBC0EDFBC0EDFBC0EDFB00 0000C0EDFBC0EDFBC0EDFBC0EDFBC0EDFBC0EDFBC0EDFB000000C2EEFBC2EEFB C2EEFBC2EEFBC2EEFBC2EEFBC2EEFB000000C3EFFCC3EFFCC3EFFCC3EFFCC3EF FCC3EFFCC3EFFC000000C5EFFBC5EFFBC5EFFBC5EFFBC5EFFBC5EFFBC5EFFB00 0000C8F0FCC8F0FCC8F0FCC8F0FCC8F0FCC8F0FCC8F0FC000000CAF1FACAF1FA CAF1FACAF1FACAF1FACAF1FACAF1FA000000CBF2FBCBF2FBCBF2FBCBF2FBCBF2 FBCBF2FBCBF2FB000000CEF1FBCEF1FBCEF1FBCEF1FBCEF1FBCEF1FBCEF1FB00 0000CEF1FBCEF1FBCEF1FBCEF1FBCEF1FBCEF1FBCEF1FB000000CFF2FCCFF2FC CFF2FCCFF2FCCFF2FCCFF2FCCFF2FC000000D2F2FDD2F2FDD2F2FDD2F2FDD2F2 FDD2F2FDD2F2FD000000D2F3FCD2F3FCD2F3FCD2F3FCD2F3FCD2F3FCD2F3FC00 0000D4F3FCD4F3FCD4F3FCD4F3FCD4F3FCD4F3FCD4F3FC000000D4F3FCD4F3FC D4F3FCD4F3FCD4F3FCD4F3FCD4F3FC000000D4F3FCD4F3FCD4F3FCD4F3FCD4F3 FCD4F3FCD4F3FC000000} end
那么在实际的应用中如何实现把图片转16进制呢，可以参考以下转换PNG的例子，其他格式的图片转换都基本类似：
uses pngimage; {从 png 图片到十六进制字符串}function Png2Hex(png: TPngImage): string;var stream: TMemoryStream;begin stream := TMemoryStream.Create; png.SaveToStream(stream); SetLength(Result, stream.Size * 2); BinToHex(stream.Memory, PChar(Result), stream.Size); stream.Free;end; {从十六进制字符串恢复 png 图片}procedure Hex2Png(str: string; out png: TPngImage);var stream: TMemoryStream;begin if not Assigned(png) then png := TPngImage.Create; stream := TMemoryStream.Create; stream.SetSize(Length(str) div 2); HexToBin(PChar(str), stream.Memory, stream.Size); png.LoadFromStream(stream); stream.Free;end; {测试}procedure TForm1.Button1Click(Sender: TObject);var png: TPngImage;begin png := TPngImage.Create; png.LoadFromFile(‘c:\temp\test.png‘); Memo1.Text := Png2Hex(png); png.Free;end; procedure TForm1.Button2Click(Sender: TObject);var png: TPngImage;begin png := TPngImage.Create; Hex2Png(Memo1.Text, png); Canvas.Draw(0, 0, png); png.Free;end;
请注意，这点特别重要：
在个别时候，可能需要解析From源代码中生成的16进制图片，可以参考以下代码：
粘贴的时候，要去掉开头的一小段类信息：具体要看自己保存出来的图片字符串
由于我采用的pngimage控件中未找到TPngImage类，我通过修改改成一下代码
在我的代码中，我加载到TImage控件中的代码为：
{从 png 图片到十六进制字符串}function Png2Hex(png: TPngObject): string;var stream: TMemoryStream;begin stream := TMemoryStream.Create; png.SaveToStream(stream); SetLength(Result, stream.Size * 2); BinToHex(stream.Memory, PChar(Result), stream.Size); stream.Free;end; {从十六进制字符串恢复 png 图片}procedure Hex2Png(str: string; out png: TPngObject);var stream: TMemoryStream;begin if not Assigned(png) then png := TPngObject.Create; stream := TMemoryStream.Create; stream.SetSize(Length(str) div 2); HexToBin(PChar(str), stream.Memory, stream.Size); png.LoadFromStream(stream); stream.Free;end;
procedure TForm1.Button4Click(Sender: TObject);var png: TPngObject;begin //通过Image图片获取字符串 png := TPngObject.Create; try png.Assign(Image1.Picture.Graphic); Memo1.Text:=Png2Hex(png); finally png.Free; end;end;procedure TForm1.Button5Click(Sender: TObject);var png: TPngObject;begin //通过字符串显示到Image图片 png := TPngObject.Create; try Hex2Png(Memo1.Text,png); Image1.Picture.Graphic.Assign(png); finally png.Free; end;end;
太有用了，所以转：Delphi下16进制位图数据转位图
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