def err(i):
"error function"
f = 1 / (1. + quality * 254)
t = rgba(i)
c2 = (int(int(t[0] * f) / f), int(int(t[1] * f) / f),
int(int(t[2] * f) / f), t[3])
return reduce(c2)
def image_decode(f):
record = None
palette = None
while record != modes['end']:
record, size = struct.unpack("<2I", f.read(8))
raw_data = f.read(size)
f.read(-size % 4) # align
if record == modes['header']:
w, h = struct.unpack("<2I", raw_data)
print "(header) w: %d, h:%d " % (w, h)
elif record == modes['end']:
pass
elif record == modes['line16']:
pass
elif record == modes['rle']:
print '(data)', len(raw_data), 'bytes'
# read all blits / lines
y = 0
src = 0
tuples = []
line = []
while y < h:
header, color = struct.unpack('<HH', raw_data[src:src + 4])
src += 4
nb = (header >> 3) # pixels
eol = header & 1
if DEBUG:
print 'header(nb=%d,color=%d,eol=%d)' % (nb, color, eol),
if (eol): print
for i in range(nb):
line.append(rgba(color))
if eol:
for i in range(w - len(line)):
line.append((0, 0, 0, 0))
y += 1
tuples += line
line = []
# finish line by skipping bytes
src += (-src % 4)
else:
print "unknown record type:", record
img = Image.new("RGBA", (w, h))
img.putdata(tuples)
return img
def image_decode(f) :
record=None;palette=None
while record != modes['end'] :
record,size=struct.unpack("<2I",f.read(8))
raw_data = f.read(size)
f.read(-size%4) # align
if record==modes['header'] :
w,h=struct.unpack("<2I",raw_data)
print "(header) w: %d, h:%d "%(w,h)
elif record==modes['end'] :
pass
elif record==modes['line16'] :
pass
elif record == modes['rle'] :
print '(data)',len(raw_data),'bytes'
# read all blits / lines
y=0; src=0
tuples=[]
line=[]
while y<h :
header, color=struct.unpack('<HH',raw_data[src:src+4])
src +=4
nb = (header>>3) # pixels
eol = header&1
if DEBUG :
print 'header(nb=%d,color=%d,eol=%d)'%(nb,color,eol),
if (eol) : print
for i in range(nb) : line.append(rgba(color))
if eol :
for i in range(w-len(line)) : line.append((0,0,0,0))
y += 1
tuples +=line
line=[]
# finish line by skipping bytes
src += (-src%4)
else :
print "unknown record type:",record
img = Image.new("RGBA",(w,h))
img.putdata(tuples)
return img
def err(i) :
"error function"
f = 1/(1.+quality*254)
t=rgba(i)
c2=(int(int(t[0]*f)/f),int(int(t[1]*f)/f),int(int(t[2]*f)/f),t[3])
return reduce(c2)
