本文整理匯總了Python中cpngfilters.convert_la_to_rgba方法的典型用法代碼示例。如果您正苦於以下問題：Python cpngfilters.convert_la_to_rgba方法的具體用法？Python cpngfilters.convert_la_to_rgba怎麽用？Python cpngfilters.convert_la_to_rgba使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類cpngfilters的用法示例。
在下文中一共展示了cpngfilters.convert_la_to_rgba方法的5個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: convert_la_to_rgba
# 需要導入模塊: import cpngfilters [as 別名]
# 或者: from cpngfilters import convert_la_to_rgba [as 別名]
def convert_la_to_rgba(row, result):
for i in range(3):
result[i::4] = row[0::2]
result[3::4] = row[1::2] 示例2: asRGBA
# 需要導入模塊: import cpngfilters [as 別名]
# 或者: from cpngfilters import convert_la_to_rgba [as 別名]
def asRGBA(self):
"""Return image as RGBA pixels. Greyscales are expanded into
RGB triplets; an alpha channel is synthesized if necessary.
The return values are as for the :meth:`read` method
except that the *metadata* reflect the returned pixels, not the
source image. In particular, for this method
``metadata['greyscale']`` will be ``False``, and
``metadata['alpha']`` will be ``True``.
"""
width,height,pixels,meta = self.asDirect()
if meta['alpha'] and not meta['greyscale']:
return width,height,pixels,meta
typecode = 'BH'[meta['bitdepth'] > 8]
maxval = 2**meta['bitdepth'] - 1
maxbuffer = struct.pack('=' + typecode, maxval) * 4 * width
def newarray():
return array(typecode, maxbuffer)
if meta['alpha'] and meta['greyscale']:
# LA to RGBA
def convert():
for row in pixels:
# Create a fresh target row, then copy L channel
# into first three target channels, and A channel
# into fourth channel.
a = newarray()
pngfilters.convert_la_to_rgba(row, a)
yield a
elif meta['greyscale']:
# L to RGBA
def convert():
for row in pixels:
a = newarray()
pngfilters.convert_l_to_rgba(row, a)
yield a
else:
assert not meta['alpha'] and not meta['greyscale']
# RGB to RGBA
def convert():
for row in pixels:
a = newarray()
pngfilters.convert_rgb_to_rgba(row, a)
yield a
meta['alpha'] = True
meta['greyscale'] = False
return width,height,convert(),meta 示例3: asRGBA
# 需要導入模塊: import cpngfilters [as 別名]
# 或者: from cpngfilters import convert_la_to_rgba [as 別名]
def asRGBA(self):
"""Return image as RGBA pixels. Greyscales are expanded into
RGB triplets; an alpha channel is synthesized if necessary.
The return values are as for the :meth:`read` method
except that the *metadata* reflect the returned pixels, not the
source image. In particular, for this method
``metadata['greyscale']`` will be ``False``, and
``metadata['alpha']`` will be ``True``.
"""
width,height,pixels,meta = self.asDirect()
if meta['alpha'] and not meta['greyscale']:
return width,height,pixels,meta
typecode = 'BH'[meta['bitdepth'] > 8]
maxval = 2**meta['bitdepth'] - 1
maxbuffer = struct.pack('=' + typecode, maxval) * 4 * width
def newarray():
return array(str(typecode), maxbuffer)
if meta['alpha'] and meta['greyscale']:
# LA to RGBA
def convert():
for row in pixels:
# Create a fresh target row, then copy L channel
# into first three target channels, and A channel
# into fourth channel.
a = newarray()
pngfilters.convert_la_to_rgba(row, a)
yield a
elif meta['greyscale']:
# L to RGBA
def convert():
for row in pixels:
a = newarray()
pngfilters.convert_l_to_rgba(row, a)
yield a
else:
assert not meta['alpha'] and not meta['greyscale']
# RGB to RGBA
def convert():
for row in pixels:
a = newarray()
pngfilters.convert_rgb_to_rgba(row, a)
yield a
meta['alpha'] = True
meta['greyscale'] = False
return width,height,convert(),meta 示例4: asRGBA
# 需要導入模塊: import cpngfilters [as 別名]
# 或者: from cpngfilters import convert_la_to_rgba [as 別名]
def asRGBA(self):
"""Return image as RGBA pixels. Greyscales are expanded into
RGB triplets; an alpha channel is synthesized if necessary.
The return values are as for the :meth:`read` method
except that the *metadata* reflect the returned pixels, not the
source image. In particular, for this method
``metadata['greyscale']`` will be ``False``, and
``metadata['alpha']`` will be ``True``.
"""
width, height, pixels, meta = self.asDirect()
if meta['alpha'] and not meta['greyscale']:
return width, height, pixels, meta
typecode = 'BH' [meta['bitdepth'] > 8]
maxval = 2**meta['bitdepth'] - 1
maxbuffer = struct.pack('=' + typecode, maxval) * 4 * width
def newarray():
return array(typecode, maxbuffer)
if meta['alpha'] and meta['greyscale']:
# LA to RGBA
def convert():
for row in pixels:
# Create a fresh target row, then copy L channel
# into first three target channels, and A channel
# into fourth channel.
a = newarray()
pngfilters.convert_la_to_rgba(row, a)
yield a
elif meta['greyscale']:
# L to RGBA
def convert():
for row in pixels:
a = newarray()
pngfilters.convert_l_to_rgba(row, a)
yield a
else:
assert not meta['alpha'] and not meta['greyscale']
# RGB to RGBA
def convert():
for row in pixels:
a = newarray()
pngfilters.convert_rgb_to_rgba(row, a)
yield a
meta['alpha'] = True
meta['greyscale'] = False
return width, height, convert(), meta 示例5: asRGBA
# 需要導入模塊: import cpngfilters [as 別名]
# 或者: from cpngfilters import convert_la_to_rgba [as 別名]
def asRGBA(self):
"""Return image as RGBA pixels. Greyscales are expanded into
RGB triplets; an alpha channel is synthesized if necessary.
The return values are as for the :meth:`read` method
except that the *metadata* reflect the returned pixels, not the
source image. In particular, for this method
``metadata['greyscale']`` will be ``False``, and
``metadata['alpha']`` will be ``True``.
"""
width, height, pixels, meta = self.asDirect()
if meta['alpha'] and not meta['greyscale']:
return width, height, pixels, meta
typecode = 'BH'[meta['bitdepth'] > 8]
maxval = 2 ** meta['bitdepth'] - 1
maxbuffer = struct.pack('=' + typecode, maxval) * 4 * width
def newarray():
return array(typecode, maxbuffer)
if meta['alpha'] and meta['greyscale']:
# LA to RGBA
def convert():
for row in pixels:
# Create a fresh target row, then copy L channel
# into first three target channels, and A channel
# into fourth channel.
a = newarray()
pngfilters.convert_la_to_rgba(row, a)
yield a
elif meta['greyscale']:
# L to RGBA
def convert():
for row in pixels:
a = newarray()
pngfilters.convert_l_to_rgba(row, a)
yield a
else:
assert not meta['alpha'] and not meta['greyscale']
# RGB to RGBA
def convert():
for row in pixels:
a = newarray()
pngfilters.convert_rgb_to_rgba(row, a)
yield a
meta['alpha'] = True
meta['greyscale'] = False
return width, height, convert(), meta