StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
text
Body
copied!<p>I got this from somewhere on the web - can't remember exactly where but it works for me!<br/> I just made it into a nice function.<br/><br/> It uses the GhostScript APIs (GSdll32.dll)<br/><br/> Examples of the imageFormat parameter are "jpeg", "tiff32nc", etc.<br/></p> <pre><code> #region GhostScript API functions [DllImport("gsdll32.dll", EntryPoint = "gsapi_new_instance")] private static extern int CreateAPIInstance(out IntPtr pinstance, IntPtr caller_handle); [DllImport("gsdll32.dll", EntryPoint = "gsapi_init_with_args")] private static extern int InitAPI(IntPtr instance, int argc, IntPtr argv); [DllImport("gsdll32.dll", EntryPoint = "gsapi_exit")] private static extern int ExitAPI(IntPtr instance); [DllImport("gsdll32.dll", EntryPoint = "gsapi_delete_instance")] private static extern void DeleteAPIInstance(IntPtr instance); #endregion public bool CreateImage(string inputPath, string outputPath, string imageFormat, int firstPage, int lastPage, int width, int height) { bool result = false; try { string[] args = GetArgs(inputPath, outputPath, imageFormat, firstPage, lastPage, width, height); var argStrHandles = new GCHandle[args.Length]; var argPtrs = new IntPtr[args.Length]; // Create a handle for each of the arguments after // they've been converted to an ANSI null terminated // string. Then store the pointers for each of the handles for (int i = 0; i < args.Length; i++) { argStrHandles[i] = GCHandle.Alloc(StringToAnsi(args[i]), GCHandleType.Pinned); argPtrs[i] = argStrHandles[i].AddrOfPinnedObject(); } // Get a new handle for the array of argument pointers var argPtrsHandle = GCHandle.Alloc(argPtrs, GCHandleType.Pinned); // Get a pointer to an instance of the GhostScript API // and run the API with the current arguments IntPtr gsInstancePtr; CreateAPIInstance(out gsInstancePtr, IntPtr.Zero); InitAPI(gsInstancePtr, args.Length, argPtrsHandle.AddrOfPinnedObject()); // Cleanup arguments in memory for (int i = 0; i < argStrHandles.Length; i++) argStrHandles[i].Free(); argPtrsHandle.Free(); // Clear API ExitAPI(gsInstancePtr); DeleteAPIInstance(gsInstancePtr); result = true; } catch(Exception e) { throw e; } return result; } </code></pre>

Querying!

Guidance

An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload