Cogl 2.0 Reference Manual | ||||
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Top | Description |
CoglAttributeBuffer: Buffers of vertex attributesCoglAttributeBuffer: Buffers of vertex attributes — Functions for creating and manipulating attribute buffers |
CoglAttributeBuffer; CoglAttributeBuffer * cogl_attribute_buffer_new_with_size (CoglContext *context
,size_t bytes
); CoglAttributeBuffer * cogl_attribute_buffer_new (CoglContext *context
,size_t bytes
,const void *data
); CoglBool cogl_is_attribute_buffer (void *object
);
CoglAttributeBuffer * cogl_attribute_buffer_new_with_size (CoglContext *context
,size_t bytes
);
Describes a new CoglAttributeBuffer of size
bytes to contain
arrays of vertex attribute data. Afterwards data can be set using
cogl_buffer_set_data()
or by mapping it into the application's
address space using cogl_buffer_map()
.
The underlying storage of this buffer isn't allocated by this
function so that you have an opportunity to use the
cogl_buffer_set_update_hint()
and cogl_buffer_set_usage_hint()
functions which may influence how the storage is allocated. The
storage will be allocated once you upload data to the buffer.
Note: You can assume this function always succeeds and won't return
NULL
|
A CoglContext |
|
The number of bytes to allocate for vertex attribute data. |
Returns : |
A newly allocated CoglAttributeBuffer. Never NULL . [transfer full]
|
Stability Level: Unstable
CoglAttributeBuffer * cogl_attribute_buffer_new (CoglContext *context
,size_t bytes
,const void *data
);
Describes a new CoglAttributeBuffer of size
bytes to contain
arrays of vertex attribute data and also uploads size
bytes read
from data
to the new buffer.
You should never pass a NULL
data pointer.
NULL
and so you can assume this function
always succeeds.
cogl_attribute_buffer_new_with_size()
and then
explicitly catch errors with cogl_buffer_set_data()
or
cogl_buffer_map()
.
|
A CoglContext |
|
The number of bytes to allocate for vertex attribute data. |
|
An optional pointer to vertex data to upload immediately. [array length=bytes] |
Returns : |
A newly allocated CoglAttributeBuffer (never NULL ). [transfer full]
|
Since 1.4
Stability Level: Unstable
CoglBool cogl_is_attribute_buffer (void *object
);
Gets whether the given object references a CoglAttributeBuffer.
|
A CoglObject |
Returns : |
TRUE if object references a CoglAttributeBuffer,
FALSE otherwise |
Since 1.4
Stability Level: Unstable