Dear developers, I am trying to make a GIMP plugin that can open a new drawable on the screen. Just like when you make one from File->New. It should be 800x600 24bit greyscale. The code I have written is attached with Makefile. When I select the plugin in GIMP I get these errors: Calling error for procedure 'gimp-drawable-width': Procedure 'gimp-drawable-width' has been called with an invalid ID for argument 'drawable'. Most likely a plug-in is trying to work on a layer that doesn't exist any longer. Calling error for procedure 'gimp-drawable-height': Procedure 'gimp-drawable-height' has been called with an invalid ID for argument 'drawable'. Most likely a plug-in is trying to work on a layer that doesn't exist any longer. Calling error for procedure 'gimp-drawable-bpp': Procedure 'gimp-drawable-bpp' has been called with an invalid ID for argument 'drawable'. Most likely a plug-in is trying to work on a layer that doesn't exist any longer. Can someone see what's wrong? Lots of love, Louise
#include <libgimp/gimp.h>
typedef struct {
gint32 drawable_id; /* drawable ID */
guint width; /* width of drawble */
guint height; /* height of drawble */
guint bpp; /* bytes per pixel of drawable */
guint ntile_rows; /* # of tile rows */
guint ntile_cols; /* # of tile columns */
GimpTile *tiles; /* the normal tiles */
GimpTile *shadow_tiles; /* the shadow tiles */
} MyDrawable;
static void
query (void)
{
static GimpParamDef args[] =
{
{
GIMP_PDB_INT32,
"run-mode",
"Run mode"
},
{
GIMP_PDB_IMAGE,
"image",
"Input image"
},
{
GIMP_PDB_DRAWABLE,
"drawable",
"Input drawable"
}
};
gimp_install_procedure (
"plug-in-hello",
"Hello, world!",
"Displays \"Hello, world!\" in a dialog",
"David Neary",
"Copyright David Neary",
"2004",
"_Hello world...",
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_plugin_menu_register ("plug-in-hello",
"<Image>/Filters/Misc");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpRunMode run_mode;
/* ??? */
GimpDrawable *drawable;
/* Setting mandatory output values */
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
/* Getting run_mode - we won't display a dialog if
* we are in NONINTERACTIVE mode */
run_mode = param[0].data.d_int32;
/* Do I open a new drawable on the screen like this? */
MyDrawable d;
d.drawable_id = 0;
d.width = 800;
d.height = 600;
d.bpp = 24;
d.ntile_rows = 1;
d.ntile_cols = 1;
d.tiles = NULL;
d.shadow_tiles = NULL;
/* ??? */
/* Get the specified drawable */
drawable = gimp_drawable_get (param[2].data.d_drawable);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
g_message("Hello, world!\n");
}
GimpPlugInInfo PLUG_IN_INFO =
{
NULL,
NULL,
query,
run
};
MAIN()
Attachment:
Makefile
Description: Binary data
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