def getpalette(self, entries=256):
palette = []
ix = 0
x0, x1, xm, rgb0, rgb1, segment = self.gradient[ix]
for i in range(entries):
x = i / float(entries-1)
while x1 < x:
ix += 1
x0, x1, xm, rgb0, rgb1, segment = self.gradient[ix]
w = x1 - x0
if w < EPSILON:
scale = segment(0.5, 0.5)
else:
scale = segment((xm - x0) / w, (x - x0) / w)
# expand to RGBA
r = o8(int(255 * ((rgb1[0] - rgb0[0]) * scale + rgb0[0]) + 0.5))
g = o8(int(255 * ((rgb1[1] - rgb0[1]) * scale + rgb0[1]) + 0.5))
b = o8(int(255 * ((rgb1[2] - rgb0[2]) * scale + rgb0[2]) + 0.5))
a = o8(int(255 * ((rgb1[3] - rgb0[3]) * scale + rgb0[3]) + 0.5))
# add to palette
palette.append(r + g + b + a)
return b"".join(palette), "RGBA"
def __init__(self, fp):
self.palette = [o8(i)*3 for i in range(256)]
if fp.readline()[:12] != b"GIMP Palette":
raise SyntaxError("not a GIMP palette file")
i = 0
while i <= 255:
s = fp.readline()
if not s:
break
# skip fields and comment lines
if re.match(br"\w+:|#", s):
continue
if len(s) > 100:
raise SyntaxError("bad palette file")
v = tuple(map(int, s.split()[:3]))
if len(v) != 3:
raise ValueError("bad palette entry")
if 0 <= i <= 255:
self.palette[i] = o8(v[0]) + o8(v[1]) + o8(v[2])
i += 1
self.palette = b"".join(self.palette)
def __init__(self, fp):
self.palette = [(i, i, i) for i in range(256)]
while True:
s = fp.readline()
if not s:
break
if s[0:1] == b"#":
continue
if len(s) > 100:
raise SyntaxError("bad palette file")
v = [int(x) for x in s.split()]
try:
[i, r, g, b] = v
except ValueError:
[i, r] = v
g = b = r
if 0 <= i <= 255:
self.palette[i] = o8(r) + o8(g) + o8(b)
self.palette = b"".join(self.palette)
def __init__(self, fp):
self.palette = [o8(i) * 3 for i in range(256)]
if fp.readline()[:12] != b"GIMP Palette":
raise SyntaxError("not a GIMP palette file")
i = 0
while i <= 255:
s = fp.readline()
if not s:
break
# skip fields and comment lines
if re.match(b"\w+:|#", s):
continue
if len(s) > 100:
raise SyntaxError("bad palette file")
v = tuple(map(int, s.split()[:3]))
if len(v) != 3:
raise ValueError("bad palette entry")
if 0 <= i <= 255:
self.palette[i] = o8(v[0]) + o8(v[1]) + o8(v[2])
i += 1
self.palette = b"".join(self.palette)
def __init__(self, fp):
self.palette = [(i, i, i) for i in range(256)]
while True:
s = fp.readline()
if not s:
break
if s[0:1] == b"#":
continue
if len(s) > 100:
raise SyntaxError("bad palette file")
v = [int(x) for x in s.split()]
try:
[i, r, g, b] = v
except ValueError:
[i, r] = v
g = b = r
if 0 <= i <= 255:
self.palette[i] = o8(r) + o8(g) + o8(b)
self.palette = b"".join(self.palette)
def getpalette(self, entries=256):
palette = []
ix = 0
x0, x1, xm, rgb0, rgb1, segment = self.gradient[ix]
for i in range(entries):
x = i / float(entries-1)
while x1 < x:
ix += 1
x0, x1, xm, rgb0, rgb1, segment = self.gradient[ix]
w = x1 - x0
if w < EPSILON:
scale = segment(0.5, 0.5)
else:
scale = segment((xm - x0) / w, (x - x0) / w)
# expand to RGBA
r = o8(int(255 * ((rgb1[0] - rgb0[0]) * scale + rgb0[0]) + 0.5))
g = o8(int(255 * ((rgb1[1] - rgb0[1]) * scale + rgb0[1]) + 0.5))
b = o8(int(255 * ((rgb1[2] - rgb0[2]) * scale + rgb0[2]) + 0.5))
a = o8(int(255 * ((rgb1[3] - rgb0[3]) * scale + rgb0[3]) + 0.5))
# add to palette
palette.append(r + g + b + a)
return b"".join(palette), "RGBA"
def write(self, fp):
self.header.length = len(self.palette_entries) * 3
self.header.write(fp)
for entry in self.palette_entries:
fp.write(b'' # start off with empty bytes...
+ o8(entry[0]) # h
+ o8(entry[1]) # s
+ o8(entry[2]) # v
)
def write(self, fp):
self.header.write(fp)
fp.write(b'' # start off with empty bytes...
+ o8(self.format) # format
+ o8(self.flags) # flags
+ o8(self.compression) # compression
+ o8(self.transparency_index) # transparency index
+ o16(self.delay) # delay
)
def write(self, fp):
self.header.write(fp)
fp.write(b'' # start off with empty bytes...
+ o24(QGFGraphicsDescriptor.magic) # magic
+ o8(self.version) # version
+ o32(self.total_file_size) # file size
+
o32((~self.total_file_size) & 0xFFFFFFFF) # negated file size
+ o16(self.image_width) # width
+ o16(self.image_height) # height
+ o16(self.frame_count) # frame count
)
def write(self, fp):
self.header.write(fp)
fp.write(b'' # start off with empty bytes...
+ o24(QFFFontDescriptor.magic) # magic
+ o8(self.version) # version
+ o32(self.total_file_size) # file size
+
o32((~self.total_file_size) & 0xFFFFFFFF) # negated file size
+ o8(self.line_height) # line height
+ o8(1 if self.has_ascii_table is True else 0
) # whether or not we have an ascii table present
+ o16(self.unicode_glyph_count
& 0xFFFF) # number of unicode glyphs present
+ o8(self.format) # format
+ o8(self.flags) # flags
+ o8(self.compression) # compression
+ o8(self.transparency_index) # transparency index
)
def test_standard():
assert _binary.i8(b"*") == 42
assert _binary.o8(42) == b"*"
def _open(self):
if not _accept(self.fp.read(9)):
raise SyntaxError("not an XPM file")
# skip forward to next string
while True:
s = self.fp.readline()
if not s:
raise SyntaxError("broken XPM file")
m = xpm_head.match(s)
if m:
break
self.size = int(m.group(1)), int(m.group(2))
pal = int(m.group(3))
bpp = int(m.group(4))
if pal > 256 or bpp != 1:
raise ValueError("cannot read this XPM file")
#
# load palette description
palette = [b"\0\0\0"] * 256
for i in range(pal):
s = self.fp.readline()
if s[-2:] == b'\r\n':
s = s[:-2]
elif s[-1:] in b'\r\n':
s = s[:-1]
c = i8(s[1])
s = s[2:-2].split()
for i in range(0, len(s), 2):
if s[i] == b"c":
# process colour key
rgb = s[i + 1]
if rgb == b"None":
self.info["transparency"] = c
elif rgb[0:1] == b"#":
# FIXME: handle colour names (see ImagePalette.py)
rgb = int(rgb[1:], 16)
palette[c] = (o8((rgb >> 16) & 255) +
o8((rgb >> 8) & 255) + o8(rgb & 255))
else:
# unknown colour
raise ValueError("cannot read this XPM file")
break
else:
# missing colour key
raise ValueError("cannot read this XPM file")
self.mode = "P"
self.palette = ImagePalette.raw("RGB", b"".join(palette))
self.tile = [("raw", (0, 0) + self.size, self.fp.tell(), ("P", 0, 1))]
def _open(self):
if not _accept(self.fp.read(9)):
raise SyntaxError("not an XPM file")
# skip forward to next string
while True:
s = self.fp.readline()
if not s:
raise SyntaxError("broken XPM file")
m = xpm_head.match(s)
if m:
break
self.size = int(m.group(1)), int(m.group(2))
pal = int(m.group(3))
bpp = int(m.group(4))
if pal > 256 or bpp != 1:
raise ValueError("cannot read this XPM file")
#
# load palette description
palette = [b"\0\0\0"] * 256
for i in range(pal):
s = self.fp.readline()
if s[-2:] == b'\r\n':
s = s[:-2]
elif s[-1:] in b'\r\n':
s = s[:-1]
c = i8(s[1])
s = s[2:-2].split()
for i in range(0, len(s), 2):
if s[i] == b"c":
# process colour key
rgb = s[i+1]
if rgb == b"None":
self.info["transparency"] = c
elif rgb[0:1] == b"#":
# FIXME: handle colour names (see ImagePalette.py)
rgb = int(rgb[1:], 16)
palette[c] = o8((rgb >> 16) & 255) +\
o8((rgb >> 8) & 255) +\
o8(rgb & 255)
else:
# unknown colour
raise ValueError("cannot read this XPM file")
break
else:
# missing colour key
raise ValueError("cannot read this XPM file")
self.mode = "P"
self.palette = ImagePalette.raw("RGB", b"".join(palette))
self.tile = [("raw", (0, 0)+self.size, self.fp.tell(), ("P", 0, 1))]
def test_standard(self):
self.assertEqual(_binary.i8(b'*'), 42)
self.assertEqual(_binary.o8(42), b'*')
def o24(i):
return o16(i & 0xFFFF) + o8((i & 0xFF0000) >> 16)
def test_standard(self):
self.assertEqual(_binary.i8(b"*"), 42)
self.assertEqual(_binary.o8(42), b"*")
def write(self, fp):
fp.write(b'' # start off with empty bytes...
+ o8(self.type_id) # block type id
+ o8((~self.type_id) & 0xFF) # negated block type id
+ o24(self.length) # blob length
)
