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/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2010 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*
*
* Authors:
* Robert Bragg <robert@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#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_slice_new (CoglIndexBuffer);
/* 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_slice_free (CoglIndexBuffer, 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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