mirror of
https://github.com/arsenetar/dupeguru.git
synced 2024-11-18 04:59:03 +00:00
52 lines
2.0 KiB
Cython
52 lines
2.0 KiB
Cython
# $Id$
|
|
# Copyright 2009 Hardcoded Software (http://www.hardcoded.net)
|
|
#
|
|
# This software is licensed under the "HS" License as described in the "LICENSE" file,
|
|
# which should be included with this package. The terms are also available at
|
|
# http://www.hardcoded.net/licenses/hs_license
|
|
|
|
cdef object getblock(object image):
|
|
cdef int width, height, pixel_count, red, green, blue, i, offset, bytes_per_line
|
|
cdef char *s
|
|
cdef unsigned char r, g, b
|
|
width = image.width()
|
|
height = image.height()
|
|
if width:
|
|
pixel_count = width * height
|
|
red = green = blue = 0
|
|
bytes_per_line = image.bytesPerLine()
|
|
tmp = image.bits().asstring(image.numBytes())
|
|
s = tmp
|
|
# Qt aligns all its lines on 32bit, which means that if the number of bytes per
|
|
# line for image is not divisible by 4, there's going to be crap inserted in "s"
|
|
# We have to take this into account when calculating offsets
|
|
for i in range(height):
|
|
for j in range(width):
|
|
offset = i * bytes_per_line + j * 3
|
|
r = s[offset]
|
|
g = s[offset + 1]
|
|
b = s[offset + 2]
|
|
red += r
|
|
green += g
|
|
blue += b
|
|
return (red // pixel_count, green // pixel_count, blue // pixel_count)
|
|
else:
|
|
return (0, 0, 0)
|
|
|
|
def getblocks(image, int block_count_per_side):
|
|
cdef int width, height, block_width, block_height, ih, iw, top, left
|
|
width = image.width()
|
|
height = image.height()
|
|
if not width:
|
|
return []
|
|
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-1)
|
|
for iw in range(block_count_per_side):
|
|
left = min(iw*block_width, width-block_width-1)
|
|
crop = image.copy(left, top, block_width, block_height)
|
|
result.append(getblock(crop))
|
|
return result
|