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bitmapfilter_blend.py

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from displayio import Bitmap

import bitmapfilter

from dump_bitmap import dump_bitmap_rgb_swapped

from blinka_image import decode_resource

def test_pattern():

return decode_resource("testpattern", 2)

def blinka():

return decode_resource("blinka_32x32", 0)

def blendfunc(frac):

nfrac = 1 - frac

def inner(x, y):

return x * frac + y * nfrac

return inner

def make_quadrant_bitmap():

b = Bitmap(17, 17, 1)

for i in range(b.height):

for j in range(b.width):

b[i, j] = (i < 8) ^ (j < 8)

return b

b = Bitmap(32, 32, 65535)

print(test_pattern().width)

print(blinka().width)

print(b.width)

print(test_pattern().height)

print(blinka().height)

print(b.height)

mask = make_quadrant_bitmap()

blend_table = bitmapfilter.blend_precompute(blendfunc(0.1))

bitmapfilter.blend(b, test_pattern(), blinka(), blend_table, mask)

dump_bitmap_rgb_swapped(b)

bitmapfilter.blend(b, test_pattern(), blinka(), blendfunc(0.5), mask)

dump_bitmap_rgb_swapped(b)

bitmapfilter.blend(b, test_pattern(), blinka(), max, mask)

dump_bitmap_rgb_swapped(b)

bitmapfilter.blend(b, test_pattern(), blinka(), min)

dump_bitmap_rgb_swapped(b)