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/*
* Cogl
*
* A Low Level GPU Graphics and Utilities API
*
* Copyright (C) 2010 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*
*
* Authors:
* Robert Bragg <robert@linux.intel.com>
*/
#include "cogl-config.h"
#include "cogl-object-private.h"
#include "cogl-indices.h"
#include "cogl-indices-private.h"
#include "cogl-context-private.h"
#include "cogl-gtype-private.h"
static void _cogl_index_buffer_free (CoglIndexBuffer *indices);
COGL_BUFFER_DEFINE (IndexBuffer, index_buffer);
COGL_GTYPE_DEFINE_CLASS (IndexBuffer, index_buffer);
/* XXX: Unlike the wiki design this just takes a size. A single
* indices buffer should be able to contain multiple ranges of indices
* which the wiki design doesn't currently consider. */
CoglIndexBuffer *
cogl_index_buffer_new (CoglContext *context, size_t bytes)
{
CoglIndexBuffer *indices = g_new0 (CoglIndexBuffer, 1);
/* parent's constructor */
_cogl_buffer_initialize (COGL_BUFFER (indices),
context,
bytes,
COGL_BUFFER_BIND_TARGET_INDEX_BUFFER,
COGL_BUFFER_USAGE_HINT_INDEX_BUFFER,
COGL_BUFFER_UPDATE_HINT_STATIC);
return _cogl_index_buffer_object_new (indices);
}
static void
_cogl_index_buffer_free (CoglIndexBuffer *indices)
{
/* parent's destructor */
_cogl_buffer_fini (COGL_BUFFER (indices));
g_free (indices);
}
/* XXX: do we want a convenience function like this as an alternative
* to using cogl_buffer_set_data? The advantage of this is that we can
* track meta data such as the indices type and max_index_value for a
* range as part of the indices buffer. If we just leave people to use
* cogl_buffer_set_data then we either need a way to specify the type
* and max index value at draw time or we'll want a separate way to
* declare the type and max value for a range after uploading the
* data.
*
* XXX: I think in the end it'll be that CoglIndices are to
* CoglIndexBuffers as CoglAttributes are to CoglAttributeBuffers. I.e
* a CoglIndexBuffer is a lite subclass of CoglBuffer that simply
* implies that the buffer will later be bound as indices but doesn't
* track more detailed meta data. CoglIndices build on a
* CoglIndexBuffer and define the type and max_index_value for some
* sub-range of a CoglIndexBuffer.
*/
#if 0
void
cogl_index_buffer_set_data (CoglIndexBuffer *indices,
CoglIndicesType type,
int max_index_value,
size_t write_offset,
void *user_indices,
int n_indices)
{
GList *l;
for (l = indices->ranges; l; l = l->next)
{
}
cogl_buffer_set
}
#endif
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