40 lines
1.3 KiB
Cython
40 lines
1.3 KiB
Cython
cdef object getblock(object image):
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cdef int width, height, pixel_count, red, green, blue, i, offset
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cdef char *s
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cdef unsigned char r, g, b
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width = image.width()
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height = image.height()
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if width:
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pixel_count = width * height
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red = green = blue = 0
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tmp = image.bits().asstring(image.numBytes())
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s = tmp
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for i in range(pixel_count):
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offset = i * 3
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r = s[offset]
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g = s[offset + 1]
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b = s[offset + 2]
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red += r
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green += g
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blue += b
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return (red // pixel_count, green // pixel_count, blue // pixel_count)
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else:
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return (0, 0, 0)
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def getblocks(image, int block_count_per_side):
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cdef int width, height, block_width, block_height, ih, iw, top, left
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width = image.width()
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height = image.height()
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if not width:
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return []
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block_width = max(width // block_count_per_side, 1)
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block_height = max(height // block_count_per_side, 1)
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result = []
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for ih in range(block_count_per_side):
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top = min(ih * block_height, height - block_height)
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for iw in range(block_count_per_side):
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left = min(iw * block_width, width - block_width)
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crop = image.copy(left, top, block_width, block_height)
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result.append(getblock(crop))
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return result
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