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cogl: Adds experimental CoglIndexArray type
A CoglIndexArray is a subclass of CoglBuffer and will be used to hold vertex indices. A later commit will add a CoglIndices API which will allow describing a range of indices inside a CoglIndexArray.
This commit is contained in:
Robert Bragg
parent
7901e30aac
commit
4d990a93a8
@ -72,6 +72,7 @@ cogl_public_h = \
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$(srcdir)/cogl-texture-3d.h \
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$(srcdir)/cogl-types.h \
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$(srcdir)/cogl-vertex-buffer.h \
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$(srcdir)/cogl-index-array.h \
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$(srcdir)/cogl.h \
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$(NULL)
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@ -205,6 +206,8 @@ cogl_sources_c = \
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$(srcdir)/cogl-pixel-array.c \
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$(srcdir)/cogl-vertex-buffer-private.h \
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$(srcdir)/cogl-vertex-buffer.c \
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$(srcdir)/cogl-index-array-private.h \
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$(srcdir)/cogl-index-array.c \
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$(srcdir)/cogl-matrix.c \
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$(srcdir)/cogl-vector.c \
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$(srcdir)/cogl-matrix-private.h \
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39
cogl/cogl-index-array-private.h
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39
cogl/cogl-index-array-private.h
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@ -0,0 +1,39 @@
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/*
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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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#ifndef __COGL_INDEX_ARRAY_PRIVATE_H
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#define __COGL_INDEX_ARRAY_PRIVATE_H
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#include "cogl-buffer-private.h"
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struct _CoglIndexArray
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{
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CoglBuffer _parent;
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};
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#endif /* __COGL_INDEX_ARRAY_PRIVATE_H */
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131
cogl/cogl-index-array.c
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131
cogl/cogl-index-array.c
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@ -0,0 +1,131 @@
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/*
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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 CoglVertexAttributes 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 CoglVertexAttribute 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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79
cogl/cogl-index-array.h
Normal file
79
cogl/cogl-index-array.h
Normal file
@ -0,0 +1,79 @@
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/*
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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 License
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* along with this library. If not, see <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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#if !defined(__COGL_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
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#error "Only <cogl/cogl.h> can be included directly."
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#endif
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#ifndef __COGL_INDEX_ARRAY_H__
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#define __COGL_INDEX_ARRAY_H__
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G_BEGIN_DECLS
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/**
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* SECTION:cogl-vertex-indices
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* @short_description: Functions for creating and manipulating vertex
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* indices.
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*
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* FIXME
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*/
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typedef struct _CoglIndexArray CoglIndexArray;
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/**
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* cogl_index_array_new:
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* @size: The number of bytes to allocate for vertex attribute data.
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*
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* Declares a new #CoglIndexArray of @size bytes to contain vertex
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* indices. Once declared, data can be set using
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* cogl_buffer_set_data() or by mapping it into the application's
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* address space using cogl_buffer_map().
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*
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* Since: 1.4
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* Stability: Unstable
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*/
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CoglIndexArray *
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cogl_index_array_new (gsize bytes);
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/**
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* cogl_is_indices_array:
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* @object: A #CoglObject
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*
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* Gets whether the given object references a #CoglIndexArray.
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*
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* Returns: %TRUE if the handle references a #CoglIndexArray,
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* %FALSE otherwise
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*
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* Since: 1.4
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* Stability: Unstable
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*/
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gboolean
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cogl_is_indices_array (void *object);
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G_END_DECLS
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#endif /* __COGL_INDEX_ARRAY_H__ */
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@ -54,6 +54,7 @@
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#include <cogl/cogl-pixel-array.h>
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#include <cogl/cogl-vector.h>
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#include <cogl/cogl-texture-3d.h>
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#include <cogl/cogl-index-array.h>
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#endif
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G_BEGIN_DECLS
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