def get_bitmap_line(line, width, bpp, palette):
bitmap_line = []
if bpp == 1:
line = list(line)
line.reverse()
integer = utils.filehex2dec(line)
integer >>= get_bitmap_line_byte_size(width, bpp)*8 - width * bpp
for i in xrange(width):
pixel = palette[utils.testBit(integer, i)]
bitmap_line.append(pixel)
bitmap_line.reverse()
elif bpp == 8:
line = map(ord, line)
for i in xrange(width):
pixel = palette[line[i]]
bitmap_line.append(pixel)
elif bpp == 24:
for i in xrange(width):
bgr = [ord(elem) << 8 for elem in list(line)[i*3:i*3+3]]
bgr.reverse()
bitmap_line.append(bgr)
elif bpp == 32:
for i in xrange(width):
abgr = [ord(elem) << 8 for elem in list(line)[i*4:i*4+4]]
abgr.reverse()
bitmap_line.append(abgr[1:])
else:
Exception("Wrong bbp")
return bitmap_line
def get_bitmap_line(line, width, bpp, palette):
bitmap_line = []
if bpp == 1:
line = list(line)
line.reverse()
integer = utils.filehex2dec(line)
integer >>= get_bitmap_line_byte_size(width, bpp) * 8 - width * bpp
for i in xrange(width):
pixel = palette[utils.testBit(integer, i)]
bitmap_line.append(pixel)
bitmap_line.reverse()
elif bpp == 8:
line = map(ord, line)
for i in xrange(width):
pixel = palette[line[i]]
bitmap_line.append(pixel)
elif bpp == 24:
for i in xrange(width):
bgr = [ord(elem) << 8 for elem in list(line)[i * 3:i * 3 + 3]]
bgr.reverse()
bitmap_line.append(bgr)
elif bpp == 32:
for i in xrange(width):
abgr = [ord(elem) << 8 for elem in list(line)[i * 4:i * 4 + 4]]
abgr.reverse()
bitmap_line.append(abgr[1:])
else:
Exception("Wrong bbp")
return bitmap_line
def open_file(filepath):
print "Opening \"%s\" as BMP" % filepath
f = open(filepath, 'rb')
# Checking header
signature = f.read(2)
if signature != 'BM':
raise InvalidImage()
# Header
header = {}
for field in header_fields:
header[field[0]] = utils.filehex2dec(f.read(field[1]))
for k, v in header.iteritems():
print k, ':', v
print
# Palette
has_palette = header['bits_on_pixel'] <= 8 and True or False
print "File has palette:", has_palette
palette = []
if has_palette:
for i in xrange(2**header['bits_on_pixel']):
bgra = f.read(4)
b, g, r = [ord(elem) << 8 for elem in list(bgra)[:-1]]
palette.append([r, g, b])
print "\n".join(["%7d %7d %7d" % tuple(color) for color in palette])
# Bitmap
f.seek(header['bitmap_adress'])
line_size = get_bitmap_line_byte_size(header['width'],
header['bits_on_pixel'])
print "Line size = ", line_size
line = f.read(line_size)
bitmap = []
while (line):
bitmap_line = get_bitmap_line(line, header['width'],
header['bits_on_pixel'], palette)
bitmap.append(bitmap_line)
line = f.read(line_size)
bitmap.reverse()
return header, bitmap
def open_file(filepath):
print "Opening \"%s\" as BMP" % filepath
f = open(filepath, 'rb')
# Checking header
signature = f.read(2)
if signature != 'BM':
raise InvalidImage()
# Header
header = {}
for field in header_fields:
header[field[0]] = utils.filehex2dec(f.read(field[1]))
for k,v in header.iteritems():
print k, ':', v
print
# Palette
has_palette = header['bits_on_pixel'] <= 8 and True or False
print "File has palette:", has_palette
palette = []
if has_palette:
for i in xrange(2**header['bits_on_pixel']):
bgra = f.read(4)
b, g, r = [ord(elem) << 8 for elem in list(bgra)[:-1]]
palette.append([r, g, b])
print "\n".join(["%7d %7d %7d" % tuple(color) for color in palette])
# Bitmap
f.seek(header['bitmap_adress'])
line_size = get_bitmap_line_byte_size(header['width'], header['bits_on_pixel'])
print "Line size = ",line_size
line = f.read(line_size)
bitmap = []
while (line):
bitmap_line = get_bitmap_line(line, header['width'], header['bits_on_pixel'], palette)
bitmap.append(bitmap_line)
line = f.read(line_size)
bitmap.reverse()
return header, bitmap
