I think you need to allocate the return vals (the pointeryou get from the
args is to let you tell the caller where the return vals are...like this:
static GimpParam values[1];
*nreturn_vals = 0;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = GIMP_PDB_SUCCESS;
>
> Hi all,
>
> I'm trying to write a plug-in for the gimp, but I'm having a few
> problems. I think at this stage it's pretty bare-bones, pretty much a
> hello world plug-in.
>
> Anyway, my plug-in is detected at start-up by the Gimp, and registers
> with the PDB etc - so I suspect that my query function is OK.
>
> When it's forked again to run, I get in a bit of trouble. On 1.1.28, it
> just barf about the internal failure of the plug-in, and how that could
> cause transmogrification of good, unsaved data. On 1.1.24, the widget (a
> dialog) displays, but it, and the gimp, disappear when I click on it...
> I did a stack-trace on teh core, and it looks like I got into an
> infinite loop with _dl_runtime_resolve and __restore calling each other
> a few hundred times, when gimp_ui_init starts up, until the process ran
> out of memory.
>
> Anyway, I was wondering if someone would have a quick perusal and point
> me in the direction of my stupidity. Or point me to a "hello, world!"
> gimp plug-in, or point me in the direction of references I might find
> useful, other than "Writing a GIMP Plug-in" by Kevin Turner, which is
> what I have been working out of so far.
>
> Just in case the problem is actually in the query function (in
> gimp_install_procedure, maybe?) I have included that. In fact, the only
> stuff I haven't included are header includes and global vars (of which
> there is only one, PLUG_IN_INFO). I realise this is kind of long,
> especially for a first post, but I hope you'll give me a bit of
> lattitude.
>
> Thanks a lot,
> Dave Neary.
>
> --
> Dave Neary,
> Software engineer, Informix Dublin.
> Ireland.
> Phone: +353-1-409-1357
>
> ****** Code segment starts here ***********
>
> /* query() function. Sets up type of plug-in in the PDB.
> */
> static void query(void)
> {
> /* We want to define the arguments this will take,
> * and what it will return - eventually this will include more
> * complicated stuff, for now it accepts the defaults, and returns
> * SUCCESS
> */
>
> static GimpParamDef args[]=
> {
> { GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
> { GIMP_PDB_IMAGE, "image_id", "(unused)" },
> { GIMP_PDB_DRAWABLE, "drawable_id", "Input drawable" },
> };
> static gint nargs = sizeof (args) / sizeof (args[0]);
>
> /* We need to register the module - we do this with
> * gimp_install_procedure.
> */
>
> gimp_install_procedure("plug_in_hello",
> "Prints a message",
> "For no good reason this plug-in only accepts greyscale images",
> "David Neary (dneary@xxxxxxxxxxxx)",
> "David Neary (dneary@xxxxxxxxxxxx)",
> "2000",
> "<Image>/Filters/Render/Pattern/Hello",
> "GRAY",
> GIMP_PLUGIN,
> nargs,0,
> args,NULL);
>
> }
>
> static void run(gchar *name,
> gint nparams,
> GimpParam *param,
> gint *nreturn_vals,
> GimpParam **return_vals)
> {
>
> /* We'll add a couple of widgets and show them (a dialog titled
> * Hello, world! or something equally original should do)
> */
> GtkWidget *dlg;
> GtkWidget *frame;
> GtkWidget *greeting;
> GimpPDBStatusType status = GIMP_PDB_SUCCESS;
>
> *nreturn_vals=1;
> (*return_vals)->type = GIMP_PDB_STATUS;
> ((*return_vals)->data).d_status = status;
>
> gimp_ui_init ("hello", FALSE);
>
> dlg = gimp_dialog_new ("Hello, world!", "hello",
> gimp_standard_help_func,
> MY_ARBITRARY_HTML_FILE,
> GTK_WIN_POS_MOUSE,
> FALSE, TRUE, FALSE,
>
> "OK", check_ok_callback,
> NULL, NULL, NULL, TRUE, FALSE,
> "Cancel", gtk_widget_destroy,
> NULL, 1, NULL, FALSE, TRUE,
>
> NULL);
>
> frame = gtk_frame_new ("Greeting");
> gtk_frame_set_shadow_type (GTK_FRAME (frame),
> GTK_SHADOW_ETCHED_IN);
> gtk_container_set_border_width (GTK_CONTAINER(frame), 6);
> gtk_box_pack_start (GTK_BOX(GTK_DIALOG(dlg)->vbox), frame, TRUE,
> TRUE, 0);
> gtk_widget_show(frame);
>
> greeting = gtk_entry_new ();
> gtk_entry_set_text( GTK_ENTRY(greeting),"Hello, world!");
> gtk_entry_set_editable( GTK_ENTRY(greeting), FALSE);
> gtk_container_add(GTK_CONTAINER(frame), greeting);
> gtk_widget_show(greeting);
>
> gtk_widget_show(dlg);
>
> gtk_main ();
> gdk_flush ();
>
> return;
> }
>
> /* Callback function for when the OK button is clicked. */
>
> void check_ok_callback(GtkWidget *button, GtkWidget *entry)
> {
> gchar *entry_text;
> entry_text = gtk_entry_get_text(GTK_ENTRY(entry));
> printf("Entry contents: %s\n", entry_text);
> return;
> }
>
