Vips.Operation

Subclasses:

Vips.Foreign

Methods

Inherited:

Vips.Object (27), GObject.Object (37)

Structs:

Vips.ObjectClass (1), GObject.ObjectClass (5)

class	block_set (name, state)
class	new (name)
	get_flags ()
	invalidate ()

Virtual Methods

Inherited:

Vips.Object (9), GObject.Object (7)

	do_get_flags ()
	do_invalidate ()

Properties

Inherited:

Vips.Object (2)

Signals

Inherited:

Vips.Object (4), GObject.Object (1)

Name	Short Description
invalidate

Fields

Inherited:

Vips.Object (4), GObject.Object (1)

Name	Type	Access	Description
found_hash	bool	r
hash	int	r
parent_instance	Vips.Object	r
pixels	int	r

Class Details

class Vips.Operation(**kwargs)

Bases:

Vips.Object

Abstract:

Yes

Structure:

Vips.OperationClass

classmethod block_set(name, state)

Parameters:

• name (str) – set block state at this point and below

• state (bool) – the block state to set

Set the block state on all operations in the libvips class hierarchy at name and below.

For example:

vips_operation_block_set("VipsForeignLoad", TRUE);
vips_operation_block_set("VipsForeignLoadJpeg", FALSE);

Will block all load operations, except JPEG.

Use vips -l at the command-line to see the class hierarchy.

This call does nothing if the named operation is not found.

See also: Vips.block_untrusted_set().

classmethod new(name)

Parameters:

name (str) – nickname of operation to create

Returns:

the new operation.

Return type:

Vips.Operation

Return a new Vips.Operation with the specified nickname. Useful for language bindings.

You’ll need to set any arguments and build the operation before you can use it. See vips_call() for a higher-level way to make new operations.

get_flags()

Returns:

0 on success, or -1 on error.

Return type:

Vips.OperationFlags

Returns the set of flags for this operation.

invalidate()

do_get_flags() virtual

Returns:

0 on success, or -1 on error.

Return type:

Vips.OperationFlags

Returns the set of flags for this operation.

do_invalidate() virtual

Signal Details

Vips.Operation.signals.invalidate(operation)

Signal Name:

invalidate

Flags:

RUN_LAST

Parameters:

operation (Vips.Operation) – The object which received the signal