> You can't show a drawable by itself, it needs to be in an image. Also, an
> image can't show itself, you must create a display for that. You are also
> using the API in weird ways, for example, objects such as layers and images
> are represented by integers in the plug-in context.
>
> You are also saying that the plug-in takes the active image and drawable as
> parameter, but since you are creating a new image, you are not interested in
> those values (I assume) so there is no point in specifying these as
> arguments to the hello-world procedure.
This is my first attempt to write a GIMP plugin, as you probably have
guessed by now =)
> I have attached a rewritten version of main.c (called hello-world.c since
> that is a name that doesn't conflict as much) that should do what you want.
> You might also want to consider using a scripting language like Scheme or
> Python for this.
Wow. That's amazing. Thank you very much =)
What I ultimately would like to end up with is being able to set
pixels, the user makes changes to the image, and I read the pixels one
by one again.
So now I have tried to set a pixel like so
/* Trying to set a pixel at x=5,y=5 with value 150 */
GimpDrawable* drawable;
drawable = gimp_drawable_get (layer);
/* Trying to set a pixel at x=5,y=5 with value 150 in 24 bit color */
gboolean s;
s = gimp_drawable_set_pixel (drawable, 5, 5, 24, 150);
But when I compile I get:
hello-world.c:73: warning: passing argument 1 of
‘gimp_drawable_set_pixel’ makes integer from pointer without a cast
/usr/include/gimp-2.0/libgimp/gimpdrawable_pdb.h:89: note: expected
‘gint32’ but argument is of type ‘struct GimpDrawable *’
The code is attached. I am bit lost how to solve this.
Any help will be very appreciated =)
#include <libgimp/gimp.h>
static void
query (void)
{
static GimpParamDef args[] =
{
{
GIMP_PDB_INT32,
"run-mode",
"Run mode"
},
};
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;
gint32 image;
gint32 layer;
gint32 display;
/* 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;
image = gimp_image_new (800, 600, GIMP_RGB);
layer = gimp_layer_new (image,
"foo",
800, 600,
GIMP_RGBA_IMAGE,
100.0,
GIMP_NORMAL_MODE);
gimp_image_add_layer (image, layer, 0);
/* Trying to set a pixel at x=5,y=5 with value 150 */
GimpDrawable* drawable;
drawable = gimp_drawable_get (layer);
/* Trying to set a pixel at x=5,y=5 with value 150 in 24 bit color */
gboolean s;
s = gimp_drawable_set_pixel (drawable, 5, 5, 24, 150);
display = gimp_display_new (image);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
g_message("Hello, world!\n");
}
GimpPlugInInfo PLUG_IN_INFO =
{
NULL,
NULL,
query,
run
};
MAIN()
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