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| Script-fu http://gimpchat.com/viewtopic.php?f=8&t=20123 |
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| Author: | Bongobat [ Sat Sep 17, 2022 8:44 am ] |
| Post subject: | Script-fu |
GIMP Version: 2.10.30 Operating System: Windows OS Version: 10 GIMP Experience: New User List any ERROR messages you received: Error while executing script-fu-mockup: Error: eval: unbound variable: script-fu-mockup Hi I am new to GIMP and I'm trying to use script-fu to make a simple script that takes the active layer and adjusts the perspective to fit some known coordinates but it's failing and I can't figure out why and was hoping someone could help. Here is the code Code: Select all (define (mockup x)I think its got something to do with passing the layer id to (gimp-item-transform-perspective) I discovered the function called CAR (Contents of Address Register) and tried applying it to a variable after getting the id with (gimp-image-get-active-layer 1) this works in the console but wont work in the registered code. Code: Select all (gimp-item-transform-perspective (car(gimp-image-get-active-layer 1)) 272 154 450 217 275 666 448 618)Any hints on how i could get it to work in a registered script would be appreciated. |
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| Author: | ofnuts [ Sat Sep 17, 2022 9:46 am ] |
| Post subject: | Re: Script-fu |
When you register a script, if the first two arguments of the script are in that order, and image and a drawable (so SF-IMAGE and SF-DRAWABLE in script-fu), they will be set to the current image and the image active drawable when script is called, and this is the normal way to register a script. When you do so * there is no need to call "gimp-image-get-active-layer". * even if you do your get a proper image ID to use with it ("1" is the ID of the first image you load per Gimp session, all other images will have another ID). * and this gives you a script that works on any image loaded in Gimp... |
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| Author: | Bongobat [ Sat Sep 17, 2022 11:41 am ] |
| Post subject: | Re: Script-fu |
Thank you for responding but I am still confused. I was following a youtube video called "GIMP Script-Fu 2: Write Your First Script" ( forum wont let me post link) Quote: When you register a script, if the first two arguments of the script are in that order, and image and a drawable (so SF-IMAGE and SF-DRAWABLE in script-fu), they will be set to the current image and the image active drawable when script is called, and this is the normal way to register a script. That is what I thought and why I didn't use "gimp-image-get-active-layer" in the registered script. I was trying to get it to trouble shoot and get it to work in the console and the only thing that works there is Code: Select all (gimp-item-transform-perspective (car(gimp-image-get-active-layer 1)) 272 154 450 217 275 666 448 618)The console wouldn't work either until I called (car) on the function for the active layer. I rewrote this script but it still is failing with Execution error for 'Mockup': Error: eval: unbound variable: script-fu-mockup Code: Select all (define (mockup image layer)If you could point out in this code where I am going wrong it would be greatly appreciated. |
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| Author: | ofnuts [ Sat Sep 17, 2022 2:22 pm ] |
| Post subject: | Re: Script-fu |
Bongobat wrote: Thank you for responding but I am still confused. I was following a youtube video called "GIMP Script-Fu 2: Write Your First Script" ( forum wont let me post link) Quote: When you register a script, if the first two arguments of the script are in that order, and image and a drawable (so SF-IMAGE and SF-DRAWABLE in script-fu), they will be set to the current image and the image active drawable when script is called, and this is the normal way to register a script. That is what I thought and why I didn't use "gimp-image-get-active-layer" in the registered script. I was trying to get it to trouble shoot and get it to work in the console and the only thing that works there is Code: Select all (gimp-item-transform-perspective (car(gimp-image-get-active-layer 1)) 272 154 450 217 275 666 448 618)The console wouldn't work either until I called (car) on the function for the active layer. I rewrote this script but it still is failing with Execution error for 'Mockup': Error: eval: unbound variable: script-fu-mockup Code: Select all (define (mockup image layer)If you could point out in this code where I am going wrong it would be greatly appreciated. Not a Scheme expert, I write my script in Python (but they work along the same principles). However I note that in the scripts that are installed with Gimp, the first arg to "script-fu-register" ("script-fu-mockup" in your case) is also the name of the function that implements the script, which is not true in your case ("mockup" != "script-fu-mockup"). |
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| Author: | Bongobat [ Sat Sep 17, 2022 3:17 pm ] |
| Post subject: | Re: Script-fu |
Wow Thank you so much! I didn't realized you had to name the function a certain way. Now that you pointed it out it makes sense. Here is the working code with the name correct and I added (gimp-displays-flush): Code: Select all (define (script-fu-mockup image layer) |
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| Author: | Pocholo [ Sat Sep 17, 2022 4:07 pm ] | ||
| Post subject: | Re: Script-fu | ||
Hi Bongobat. I started learning coding with "Scheme" but like ofnuts stated Python is so much easier and cleaner. I encourage you to learn Python. But if you has chosen to learn Scheme, one of our own member "Fencepost" has written a 3 parts scheming tutorials that is wonderful for new users who want to learn how to code. Download the folders with five PDF tutorials.
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| Author: | Rod [ Sat Sep 17, 2022 8:20 pm ] |
| Post subject: | Re: Script-fu |
monsoonami on YouTube has several great tutorials as well. |
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