def glBufferSubData(baseOperation, target, offset, size=None, data=None):
"""Copy subset of data into the currently bound vertex-buffer-data object
target -- the symbolic constant indicating which buffer type is intended
offset -- offset from beginning of buffer at which to copy bytes
size -- the count-in-bytes of the array (if an int/long), if None,
calculate size from data, if an array and data is None, use as
data (i.e. the parameter can be omitted and calculated)
data -- data-pointer to be used, may be None to initialize without
copying over a data-set
Note that if size is not an int/long it is considered to be data
*iff* data is None
"""
if size is None:
if data is None:
raise TypeError("Need data or size")
elif (not isinstance(size, int)) and (data is None):
data = size
size = None
try:
if size is not None:
size = int(size)
except TypeError as err:
if data is not None:
raise TypeError(
"""Expect an integer size *or* a data-array, not both""")
data = size
size = None
data = ArrayDatatype.asArray(data)
if size is None:
size = ArrayDatatype.arrayByteCount(data)
return baseOperation(target, offset, size, data)
def glBufferSubData( baseOperation, target, offset, size=None, data=None ):
"""Copy subset of data into the currently bound vertex-buffer-data object
target -- the symbolic constant indicating which buffer type is intended
offset -- offset from beginning of buffer at which to copy bytes
size -- the count-in-bytes of the array (if an int/long), if None,
calculate size from data, if an array and data is None, use as
data (i.e. the parameter can be omitted and calculated)
data -- data-pointer to be used, may be None to initialize without
copying over a data-set
Note that if size is not an int/long it is considered to be data
*iff* data is None
"""
if size is None:
if data is None:
raise TypeError( "Need data or size" )
elif (not isinstance( size, integer_types)) and (data is None):
data = size
size = None
try:
if size is not None:
size = int( size )
except TypeError:
if data is not None:
raise TypeError(
"""Expect an integer size *or* a data-array, not both"""
)
data = size
size = None
data = ArrayDatatype.asArray( data )
if size is None:
size = ArrayDatatype.arrayByteCount( data )
return baseOperation( target, offset, size, data )
def glBufferDataARB( baseOperation, target, size, data=None, usage=None ):
"""Copy given data into the currently bound vertex-buffer-data object
target -- the symbolic constant indicating which buffer type is intended
size -- if provided, the count-in-bytes of the array
data -- data-pointer to be used, may be None to initialize without
copying over a data-set
usage -- hint to the driver as to how to set up access to the buffer
Note: parameter "size" can be omitted, which makes the signature
glBufferData( target, data, usage )
instead of:
glBufferData( target, size, data, usage )
"""
if usage is None:
usage = data
data = size
size = None
data = ArrayDatatype.asArray( data )
if size is None:
size = ArrayDatatype.arrayByteCount( data )
return baseOperation( target, size, data, usage )
return baseOperation( target, size, data, usage )
@lazy( glBufferSubDataARB )
def glBufferSubDataARB( baseOperation, target, offset, size, data=None ):
"""Copy subset of data into the currently bound vertex-buffer-data object
target -- the symbolic constant indicating which buffer type is intended
offset -- offset from beginning of buffer at which to copy bytes
size -- the count-in-bytes of the array (if an int/long), if None,
calculate size from data, if an array and data is None, use as
data (i.e. the parameter can be omitted and calculated)
data -- data-pointer to be used, may be None to initialize without
copying over a data-set
Note that if size is not an int/long it is considered to be data
"""
try:
if size is not None:
size = int( size )
except TypeError, err:
if data is not None:
raise TypeError(
"""Expect an integer size *or* a data-array, not both"""
)
data = size
size = None
data = ArrayDatatype.asArray( data )
if size is None:
size = ArrayDatatype.arrayByteCount( data )
return baseOperation( target, offset, size, data )
