Hi,

I am working on a plugin and need a help with understanding how drawables works.

I would first describe what the plugin should do: 1. You open an image (lets presume the image is single layered) 2. User launches a plugin, it reads content of image and keep it in memory 3. User paints something to the image and hits a button on the plugin window (plugin stays alive all the time) 4. The plugin will read content from image, do some calculations and changes the image back.

And steps 3 are 4 are repeated many times.

First issue I run into is that when I want to paint (with paintbrush tool f.e.) to the image again, what I had painted in previous iteration is lost - it dissapears... This is my question for now, how to avoid this behaviour...

If I shoud provide some code, my "core" function that is called everytime the button is hit contains following....

gimp_pixel_rgn_init (&rgn_in, source,x1, y1, maindata.width, maindata.height,FALSE, FALSE);
gimp_pixel_rgn_init (&rgn_out, source, x1, y1, maindata.width, maindata.height, FALSE,TRUE);

gimp_pixel_rgn_get_rect (&rgn_in,rect_in,x1, y1,maindata.width,maindata.height);
#here plugin calculates rect_out
gimp_pixel_rgn_set_rect (&rgn_out, rect_out,x1, y1,maindata.width,maindata.height);

gimp_drawable_flush (source); gimp_drawable_merge_shadow (source->drawable_id, FALSE); gimp_drawable_update
(source->drawable_id,x1,y1,maindata.width,maindata.height);

I had read your Gimp reference manual but to no avail :)

Thanks !!

Tibor

Hi,

after some digging and coding I found that the problem is bit different, so please ignore description in my above mail...

The problem currently is (and I noticed also by other plugins of mine) that the image is not refreshed automatically - I have to click on the "eye" in the layers window to get it refreshed. Do I need to add something to my code in previous mail?

I can post a video if this is not clear :)

Tibor

---------- Forwarded message ---------- From: Tibor Bamhor
Date: 2013/4/23
Subject: gimp drawable question
To: gimp-developer-list@gnome.org

Hi,

I am working on a plugin and need a help with understanding how drawables works.

I would first describe what the plugin should do: 1. You open an image (lets presume the image is single layered) 2. User launches a plugin, it reads content of image and keep it in memory 3. User paints something to the image and hits a button on the plugin window (plugin stays alive all the time) 4. The plugin will read content from image, do some calculations and changes the image back.

And steps 3 are 4 are repeated many times.

First issue I run into is that when I want to paint (with paintbrush tool f.e.) to the image again, what I had painted in previous iteration is lost - it dissapears... This is my question for now, how to avoid this behaviour...

If I shoud provide some code, my "core" function that is called everytime the button is hit contains following....

gimp_pixel_rgn_init (&rgn_in, source,x1, y1, maindata.width, maindata.height,FALSE, FALSE);
gimp_pixel_rgn_init (&rgn_out, source, x1, y1, maindata.width, maindata.height, FALSE,TRUE);

gimp_pixel_rgn_get_rect (&rgn_in,rect_in,x1, y1,maindata.width,maindata.height);
#here plugin calculates rect_out
gimp_pixel_rgn_set_rect (&rgn_out, rect_out,x1, y1,maindata.width,maindata.height);

gimp_drawable_flush (source); gimp_drawable_merge_shadow (source->drawable_id, FALSE); gimp_drawable_update
(source->drawable_id,x1,y1,maindata.width,maindata.height);

I had read your Gimp reference manual but to no avail :)

Thanks !!

Tibor

GREAT!!! gimp_displays_flush() works like a sharm. Thanks!

2013/4/23 Joao S. O. Bueno

On 23 April 2013 11:51, Tibor Bamhor wrote:

Hi,

after some digging and coding I found that the problem is bit different,

so

please ignore description in my above mail...

The problem currently is (and I noticed also by other plugins of mine)

that

the image is not refreshed automatically - I have to click on the "eye"

in

the layers window to get it refreshed. Do I need to add something to my

code

in previous mail?

Try just making a call to "gimp_displays_flush" after you are done.

I can post a video if this is not clear :)

Tibor

---------- Forwarded message ---------- From: Tibor Bamhor
Date: 2013/4/23
Subject: gimp drawable question
To: gimp-developer-list@gnome.org

Hi,

I am working on a plugin and need a help with understanding how drawables works.

I would first describe what the plugin should do: 1. You open an image (lets presume the image is single layered) 2. User launches a plugin, it reads content of image and keep it in

memory

3. User paints something to the image and hits a button on the plugin

window

(plugin stays alive all the time) 4. The plugin will read content from image, do some calculations and

changes

the image back.

And steps 3 are 4 are repeated many times.

First issue I run into is that when I want to paint (with paintbrush tool f.e.) to the image again, what I had painted in previous iteration is

lost

- it dissapears... This is my question for now, how to avoid this behaviour...

If I shoud provide some code, my "core" function that is called everytime the button is hit contains following....

gimp_pixel_rgn_init (&rgn_in, source,x1, y1, maindata.width, maindata.height,FALSE, FALSE);
gimp_pixel_rgn_init (&rgn_out, source, x1, y1, maindata.width, maindata.height, FALSE,TRUE);

gimp_pixel_rgn_get_rect (&rgn_in,rect_in,x1, y1,maindata.width,maindata.height);
#here plugin calculates rect_out
gimp_pixel_rgn_set_rect (&rgn_out, rect_out,x1, y1,maindata.width,maindata.height);

gimp_drawable_flush (source); gimp_drawable_merge_shadow (source->drawable_id, FALSE); gimp_drawable_update
(source->drawable_id,x1,y1,maindata.width,maindata.height);

I had read your Gimp reference manual but to no avail :)

Thanks !!

Tibor

_______________________________________________ gimp-developer-list mailing list
gimp-developer-list@gnome.org
https://mail.gnome.org/mailman/listinfo/gimp-developer-list