#!/usr/bin/env python 

# TraceOverBlueLines, v. 2.0 Python-fu GIMP plugin.
# July 2013, under Gnu Public License
# Script by Michael B. Stevens
# Place in your .gimp-2.8 folder's plug-ins folder.  Make executable.
# Tested in Gimp 2.8.
# Will appear in GIMP menus at <Images>/Layers/TraceOverBlueLines.
# This is free and open source G.P.L. software.  Use at your own risk.


from gimpfu import *

def bluLine(timg, tdrw) :
    # Make a new simi-opaque layer.
    pdb.gimp_message("STARTING")
    lr = pdb.gimp_layer_new_from_drawable(tdrw, timg)
    pdb.gimp_image_insert_layer(timg, lr, None, -1)
    pdb.plug_in_exchange (timg, lr,
                          0,0,0,
                          200,200,255 ,
                          255,255,255)
    pdb.gimp_layer_set_mode(lr, NORMAL_MODE)
    pdb.gimp_layer_set_opacity(lr, 65.0)

    # Now make a layer for tracing...
    pdb.gimp_context_set_foreground((0, 0, 0))
    pdb.gimp_context_set_background((255, 255, 255))
    blr2 = pdb.gimp_layer_new(timg, tdrw.width, 
        tdrw.height, RGB_IMAGE, "Trace-over", 100, 
        MULTIPLY_MODE)
    pdb.gimp_drawable_fill(blr2, BACKGROUND_FILL)        
    pdb.gimp_image_insert_layer(timg, blr2, None, -1)  
    return 

register(
    "TraceOverBlueLines",
    "Add simi-transparent layers for tracing over rougher drawings",
    "Use for tracing over rougher drawings.",
    "Michael B. Stevens",
    "Prorammed  by Michael B. Stevens, G.P.L.",
    "Released under Gnu Public License, July 2013",
    "<Image>/Layer/TraceOverBlueLines",
    "*", [], [], bluLine
    )
     
main()