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# Created By: Virgil Dupras
# Created On: 2006/09/01
# Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
#
# This software is licensed under the "GPLv3" License as described in the "LICENSE" file,
# which should be included with this package. The terms are also available at
# http://www.gnu.org/licenses/gpl-3.0.html
from core.pe._block import NoBlocksError, DifferentBlockCountError, avgdiff, getblocks2 # NOQA
# Converted to C
# def getblock(image):
# """Returns a 3 sized tuple containing the mean color of 'image'.
#
# image: a PIL image or crop.
# """
# if image.size[0]:
# pixel_count = image.size[0] * image.size[1]
# red = green = blue = 0
# for r,g,b in image.getdata():
# red += r
# green += g
# blue += b
# return (red // pixel_count, green // pixel_count, blue // pixel_count)
# else:
# return (0,0,0)
# This is not used anymore
# def getblocks(image,blocksize):
# """Returns a list of blocks (3 sized tuples).
#
# image: A PIL image to base the blocks on.
# blocksize: The size of the blocks to be create. This is a single integer, defining
# both width and height (blocks are square).
# """
# if min(image.size) < blocksize:
# return ()
# result = []
# for i in xrange(image.size[1] // blocksize):
# for j in xrange(image.size[0] // blocksize):
# box = (blocksize * j, blocksize * i, blocksize * (j + 1), blocksize * (i + 1))
# crop = image.crop(box)
# result.append(getblock(crop))
# return result
# Converted to C
# def getblocks2(image,block_count_per_side):
# """Returns a list of blocks (3 sized tuples).
#
# image: A PIL image to base the blocks on.
# block_count_per_side: This integer determine the number of blocks the function will return.
# If it is 10, for example, 100 blocks will be returns (10 width, 10 height). The blocks will not
# necessarely cover square areas. The area covered by each block will be proportional to the image
# itself.
# """
# if not image.size[0]:
# return []
# width,height = image.size
# block_width = max(width // block_count_per_side,1)
# block_height = max(height // block_count_per_side,1)
# result = []
# for ih in range(block_count_per_side):
# top = min(ih * block_height, height - block_height)
# bottom = top + block_height
# for iw in range(block_count_per_side):
# left = min(iw * block_width, width - block_width)
# right = left + block_width
# box = (left,top,right,bottom)
# crop = image.crop(box)
# result.append(getblock(crop))
# return result
# Converted to C
# def diff(first, second):
# """Returns the difference between the first block and the second.
#
# It returns an absolute sum of the 3 differences (RGB).
# """
# r1, g1, b1 = first
# r2, g2, b2 = second
# return abs(r1 - r2) + abs(g1 - g2) + abs(b1 - b2)
# Converted to C
# def avgdiff(first, second, limit=768, min_iterations=1):
# """Returns the average diff between first blocks and seconds.
#
# If the result surpasses limit, limit + 1 is returned, except if less than min_iterations
# iterations have been made in the blocks.
# """
# if len(first) != len(second):
# raise DifferentBlockCountError
# if not first:
# raise NoBlocksError
# count = len(first)
# sum = 0
# zipped = izip(xrange(1, count + 1), first, second)
# for i, first, second in zipped:
# sum += diff(first, second)
# if sum > limit * i and i >= min_iterations:
# return limit + 1
# result = sum // count
# if (not result) and sum:
# result = 1
# return result
# This is not used anymore
# def maxdiff(first,second,limit=768):
# """Returns the max diff between first blocks and seconds.
#
# If the result surpasses limit, the first max being over limit is returned.
# """
# if len(first) != len(second):
# raise DifferentBlockCountError
# if not first:
# raise NoBlocksError
# result = 0
# zipped = zip(first,second)
# for first,second in zipped:
# result = max(result,diff(first,second))
# if result > limit:
# return result
# return result
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