import math
import xml.etree.ElementTree as ET

def writeBml(anim, filename):
	root = ET.Element('blm')
	root.attrib['width'] = str(anim.dimension.width)
	root.attrib['height'] = str(anim.dimension.height)
	bits = int(math.ceil(math.log(anim.dimension.depth, 2)))
	root.attrib['bits'] = str(bits)
	root.attrib['channels'] = str(anim.dimension.channels)

	header = ET.Element('header')
	for (name, val) in anim.tags:
		elem = ET.Element(name)
		elem.text = str(val)
		header.append(elem)
	root.append(header)

	for animFrame in anim:
		frame = ET.Element('frame')
		frame.attrib['duration'] = str(animFrame.delay)
		for y in range(anim.dimension.height):
			rowData = ''
			for x in range(anim.dimension.width):
				p = animFrame.getPixel(x,y)
				if type(p) == tuple or type(p) == list:
					for v in p:
						if bits >= 5:
							rowData += '%02x' % (v)
						else:
							rowData += '%x' % (v)
				else:
					if bits >= 5:
						rowData += '%02x' % (p)
					else:
						rowData += '%x' % (p)

			row = ET.Element('row')
			row.text = rowData
			frame.append(row)
		root.append(frame)

	f = open(filename, 'w')
	ET.ElementTree(root).write(f)
	f.close()