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This is part of a broader cleanup of some of the experimental Cogl API. One of the reasons for this particular rename is to reduce the verbosity of using the API. Another reason is that CoglVertexArray is going to be renamed CoglAttributeBuffer and we want to help emphasize the relationship between CoglAttributes and CoglAttributeBuffers.
132 lines
4.0 KiB
C
132 lines
4.0 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2010 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*
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*
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* Authors:
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* Robert Bragg <robert@linux.intel.com>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "cogl-object-private.h"
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#include "cogl-indices.h"
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#include "cogl-indices-private.h"
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static void _cogl_index_array_free (CoglIndexArray *indices);
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COGL_BUFFER_DEFINE (IndexArray, index_array);
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/* XXX: Unlike the wiki design this just takes a size. A single
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* indices buffer should be able to contain multiple ranges of indices
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* which the wiki design doesn't currently consider. */
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CoglIndexArray *
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cogl_index_array_new (gsize bytes)
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{
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CoglIndexArray *indices = g_slice_new (CoglIndexArray);
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gboolean use_malloc;
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if (!cogl_features_available (COGL_FEATURE_VBOS))
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use_malloc = TRUE;
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else
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use_malloc = FALSE;
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/* parent's constructor */
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_cogl_buffer_initialize (COGL_BUFFER (indices),
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bytes,
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use_malloc,
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COGL_BUFFER_BIND_TARGET_INDEX_ARRAY,
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COGL_BUFFER_USAGE_HINT_INDEX_ARRAY,
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COGL_BUFFER_UPDATE_HINT_STATIC);
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return _cogl_index_array_object_new (indices);
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}
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static void
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_cogl_index_array_free (CoglIndexArray *indices)
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{
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/* parent's destructor */
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_cogl_buffer_fini (COGL_BUFFER (indices));
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g_slice_free (CoglIndexArray, indices);
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}
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gboolean
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cogl_index_array_allocate (CoglIndexArray *indices,
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GError *error)
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{
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/* TODO */
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return TRUE;
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}
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/* XXX: do we want a convenience function like this as an alternative
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* to using cogl_buffer_set_data? The advantage of this is that we can
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* track meta data such as the indices type and max_index_value for a
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* range as part of the indices array. If we just leave people to use
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* cogl_buffer_set_data then we either need a way to specify the type
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* and max index value at draw time or we'll want a separate way to
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* declare the type and max value for a range after uploading the
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* data.
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*
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* XXX: I think in the end it'll be that CoglIndices are to
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* CoglIndexArrays as CoglAttributes are to CoglVertices. I.e
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* a CoglIndexArray is a lite subclass of CoglBuffer that simply
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* implies that the buffer will later be bound as indices but doesn't
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* track more detailed meta data. CoglIndices build on a
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* CoglIndexArray and define the type and max_index_value for some
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* sub-range of a CoglIndexArray.
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*
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* XXX: The double plurel form that "Indices" "Array" implies could be
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* a bit confusing. Also to be a bit more consistent with
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* CoglVertexArray vs CoglAttribute it might be best to rename so
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* we have CoglIndexArray vs CoglIndices? maybe even
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* CoglIndexRange :-/ ?
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*
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* CoglBuffer
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* CoglVertexArray (buffer sub-class)
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* CoglPrimitive (defines meta data for sub-region of array)
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* CoglPixelArray (buffer sub-class)
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* CoglIndexArray (buffer sub-class)
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* CoglIndices (defines meta data for sub-region of array)
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*
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*/
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#if 0
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void
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cogl_index_array_set_data (CoglIndexArray *indices,
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CoglIndicesType type,
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int max_index_value,
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gsize write_offset,
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void *user_indices,
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int n_indices)
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{
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GList *l;
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for (l = indices->ranges; l; l = l->next)
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{
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}
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cogl_buffer_set
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}
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#endif
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