small plugin code help - Printable Version

Code:

#!/usr/bin/env python

# -*- coding: utf-8 -*-



import os

from gimpfu import*





def test(timg, tdrawable):



#how to add alpha layer to my image?



#how to apply "select by color" tool on a specified pixel and delete the selection from  the whole image?



#determine the offset values manually

    pdb.gimp_drawable_offset(tdrawable, 0, 1, 18, -32) 

    

    

#the image size is constant and 150x150 crops the border    

    pdb.gimp_image_crop(timg, 2400, 1200, 150, 150)

    

    

#guides using script-fu     

    pdb.script_fu_grid_guides(timg, 0, 150, 150, 1, 0) 

    

    

#chop into 150x150 tiles    

    pdb.python_fu_ofn_guillotine_layer(timg, tdrawable)

    

    

#export all layers

    pdb.python_fu_ofn_export_layers(timg, os.path.dirname(timg.filename), "{numUp0}.png", "-", 0)

    

    

register(

        "test",

        "test",

        "test",

        "*",

        "*",

        "2024",

        "<Image>/Tools/test...",

        "*",

        [],

        [],

        test

        )



main()

Code:

#!/usr/bin/env python

# -*- coding: utf-8 -*-



import os

from gimpfu import *





def test(timg, tdrawable):

    timg.undo_group_start()   ### So that everything is undone with a single Ctrl-Z

    gimp.context_push()

    

    ### bracket the code in a try/except

    ### Any error is caught in the "except" and the script exits cleanly



    try: 

        #how to add alpha layer to my image?

        ### pdb.gimp_layer_add_alpha(tdrawable)

        

        #how to apply "select by color" tool on a specified pixel and delete the selection from  the whole image?

        ### See pdb.gimp_image_select_color(image, operation, drawable, color)

        

        #determine the offset values manually

        pdb.gimp_drawable_offset(tdrawable, 0, 1, 18, -32)  ### These could be script parameters

        

        #the image size is constant and 150x150 crops the border    

        ###  IMHO the gimp_drawable_offset above is superfluous, you can combine both if you don't use 150,150

        pdb.gimp_image_crop(timg, 2400, 1200, 150, 150)  

        

        #guides using script-fu    

        pdb.script_fu_grid_guides(timg, 0, 150, 150, 1, 0)

        

        #chop into 150x150 tiles    

        pdb.python_fu_ofn_guillotine_layer(timg, tdrawable)

        

        #export all layers

        pdb.python_fu_ofn_export_layers(timg, os.path.dirname(timg.filename), "{numUp0}.png", "-", 0)



    except Exception as e:

        trace(e.args[0])

        gimp.message(e.args[0])

        if debug:

            traceback.print_exc()

    gimp.context_pop()

    timg.undo_group_end()



    

    

register(

       "gg-test",  # This one (aka "atom") should be unique across all scripts, so use a prefix

       "test",

       "test",

       "*",

       "*",

       "2024",

       "GGtest",   # Only menu entry here

       "*",

       [

        (PF_IMAGE,      'image',        'Input image',  None),  # Your "timg" arg

        (PF_DRAWABLE,   'layer',        'Input layer',  None),  # Your "tdrawable" arg

       ],

       [],

       test,

       menu="<Image>/Test" # Menu location here

       )



main()

Code:

from gimpfu import *

Code:

GimpChannelOps operation

Code:

const GimpRGB *color

Code:

# selecting blue (#0000FF)



# No decimal dot, integer format, [0 .. 255] range assumed

pdb.gimp_image_select_color(image, CHANNEL_OP_REPLACE, layer, (0,0,255))



# Decimal dot, floating point format, [0.0 .. 1.0] range assumed 

pdb.gimp_image_select_color(image, CHANNEL_OP_REPLACE, layer, (0.,0.,1.))



# You can of course use a variable:

color=(0,0,255)

pdb.gimp_image_select_color(image, CHANNEL_OP_REPLACE, layer, color)