...Recover Bitmaps from Resource Files by code?
Author: Davy Landman
procedure RecoverBitmapFromResource(const sRecourceName: PAnsiChar; const sDestFileName: string);
const
BM = $4D42; {Bitmap type identifier}
var
Bmp: TBitmap;
BMF: TBitmapFileHeader;
HResInfo: THandle;
MemHandle: THandle;
mStream: TMemoryStream;
ResPtr: PByte;
begin
BMF.bfType := BM;
{ Find, Load, and Lock the Resource containing BITMAP1 }
HResInfo := FindResource(HInstance, sRecourceName, RT_BITMAP);
MemHandle := LoadResource(HInstance, HResInfo);
ResPtr := LockResource(MemHandle);
{ the header is lost, so will need to be recalculated,
but lets be lazy and let TBitmap recreate the full header }
mStream := TMemoryStream.Create;
try
mStream.SetSize(SizeofResource(HInstance, HResInfo) + SizeOf(BMF));
mStream.Write(BMF, SizeOf(BMF));
mStream.Write(ResPtr^, SizeofResource(HInstance, HResInfo));
mStream.Seek(0, 0);
{Create the TBitmap and load the image from the MemoryStream}
Bmp := TBitmap.Create;
try
Bmp.LoadFromStream(mStream);
Bmp.SaveToFile(sDestFileName);
finally
Bmp.Free;
end;
finally
FreeResource(MemHandle);
mStream.Free;
end;
end;
{usage: RecoverBitmapFromResource('BITMAP_1', 'C:\recover.bmp'); }
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