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111 lines
3.8 KiB
C
111 lines
3.8 KiB
C
/*
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* Cogl
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*
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* A Low Level GPU Graphics and Utilities API
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*
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* Copyright (C) 2010 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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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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#include "cogl-config.h"
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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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#include "cogl-context-private.h"
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#include "cogl-gtype-private.h"
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static void _cogl_index_buffer_free (CoglIndexBuffer *indices);
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COGL_BUFFER_DEFINE (IndexBuffer, index_buffer);
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COGL_GTYPE_DEFINE_CLASS (IndexBuffer, index_buffer);
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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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CoglIndexBuffer *
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cogl_index_buffer_new (CoglContext *context, size_t bytes)
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{
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CoglIndexBuffer *indices = g_slice_new (CoglIndexBuffer);
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/* parent's constructor */
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_cogl_buffer_initialize (COGL_BUFFER (indices),
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context,
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bytes,
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COGL_BUFFER_BIND_TARGET_INDEX_BUFFER,
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COGL_BUFFER_USAGE_HINT_INDEX_BUFFER,
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COGL_BUFFER_UPDATE_HINT_STATIC);
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return _cogl_index_buffer_object_new (indices);
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}
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static void
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_cogl_index_buffer_free (CoglIndexBuffer *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 (CoglIndexBuffer, indices);
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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 buffer. 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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* CoglIndexBuffers as CoglAttributes are to CoglAttributeBuffers. I.e
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* a CoglIndexBuffer 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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* CoglIndexBuffer and define the type and max_index_value for some
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* sub-range of a CoglIndexBuffer.
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*/
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#if 0
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void
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cogl_index_buffer_set_data (CoglIndexBuffer *indices,
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CoglIndicesType type,
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int max_index_value,
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size_t 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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