fullSheetToPages.py

#!/usr/bin/env python

# copy into the gimp console until I make it any more proper

unifont_image = gimp.image_list()[0]
unifont_main_layer = unifont_image.layers[0]

print("Converting to RGB...")
pdb.gimp_image_convert_rgb(unifont_image)
pdb.gimp_image_resize(unifont_image, 4096, 4096, -32, -64)

print("Adding alpha...")
pdb.gimp_layer_add_alpha(unifont_main_layer)
print("Selecting white...")
pdb.gimp_image_select_color(unifont_image, 2, unifont_main_layer, (255, 255, 255))
print("Clearing selection...")
pdb.gimp_edit_clear(unifont_main_layer)
print("Inverting selection...")
pdb.gimp_selection_invert(unifont_image)
pdb.gimp_context_set_foreground((255, 255, 255))
print("Filling selection with white...")
pdb.gimp_edit_fill(unifont_main_layer, 0)
print("Clearing selection...")
pdb.gimp_selection_none(unifont_image)

def separate_page(index):
    print("Selecting row")
    pdb.gimp_image_select_rectangle(unifont_image, 2, 0, index*16, 4096, 16)
    print("Copying row")
    pdb.gimp_edit_copy(unifont_main_layer)
    print("Pasting as new image")
    page_image = pdb.gimp_edit_paste_as_new()
    page_source_layer = page_image.layers[0]
    for i in range(16):
        print("Selecting section " + str(i))
        pdb.gimp_image_select_rectangle(page_image, 2, i*256, 0, 256, 16)
        print("Copying section")
        pdb.gimp_edit_copy(page_source_layer)
        pdb.gimp_selection_none(page_image)
        print("Pasting section")
        floating_layer = pdb.gimp_edit_paste(page_source_layer, False)
        print("Floating selection to layer")
        pdb.gimp_floating_sel_to_layer(floating_layer)
        print("Positioning section")
        pdb.gimp_layer_set_offsets(floating_layer, 0, i*16)
    pdb.gimp_image_resize(page_image, 256, 256, 0, 0)
    pdb.gimp_display_new(page_image)

separate_page(1)