Class
CoglBuffer
Description [src]
abstract class Cogl.Buffer : GObject.Object
{
/* No available fields */
}Common buffer functions, including data upload APIs
The CoglBuffer API provides a common interface to manipulate
buffers that have been allocated either via cogl_pixel_buffer_new()
or cogl_attribute_buffer_new(). The API allows you to upload data
to these buffers and define usage hints that help Cogl manage your
buffer optimally.
Data can either be uploaded by supplying a pointer and size so Cogl
can copy your data, or you can mmap() a CoglBuffer and then you can
copy data to the buffer directly.
One of the most common uses for CoglBuffers is to upload texture data asynchronously since the ability to mmap the buffers into the CPU makes it possible for another thread to handle the IO of loading an image file and unpacking it into the mapped buffer without blocking other Cogl operations.
Instance methods
cogl_buffer_map
Maps the buffer into the application address space for direct
access. This is equivalent to calling cogl_buffer_map_range() with
zero as the offset and the size of the entire buffer as the size.
cogl_buffer_map_range
Maps a sub-region of the buffer into the application’s address space for direct access.
cogl_buffer_set_data
Updates part of the buffer with new data from data. Where to put this new
data is controlled by offset and offset + data should be less than the
buffer size.
cogl_buffer_set_update_hint
Sets the update hint on a buffer. See CoglBufferUpdateHint for a description
of the available hints.
Signals
Signals inherited from GObject (1)
GObject::notify
The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.