On Sun, 2 Oct 2011 13:26:09 +0200 "ADTEC (Pty) Ltd" <[email protected]> wrote:
> Does anyone know of a simple way to determine the picture dimensions > for a JPEG file? I can determine them using the LazJPG unit and > loading the file into a variable. The problem is that when I'm trying > to determine the dimensions on a whole directory of files, the time > taken to load each file makes the process unuseable. > > I've tried to understand the file layout for jpg files (wikipedia and > jpeg.org) but don't see where the final dimensions are stored. What I > would like to do is read just enough of each file to get the height > and width of the final image. Any suggestions? Maybe you can alter the fpreadjpeg unit and add a property to read only the header. I need a quick jpeg dimension function too. Mattias -- _______________________________________________ Lazarus mailing list [email protected] http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
