b72f255c0a
Since we've had several developers from admirable projects say they would like to use Cogl but would really prefer not to pull in gobject,gmodule and glib as extra dependencies we are investigating if we can get to the point where glib is only an optional dependency. Actually we feel like we only make minimal use of glib anyway, so it may well be quite straightforward to achieve this. This adds a --disable-glib configure option that can be used to disable features that depend on glib. Actually --disable-glib doesn't strictly disable glib at this point because it's more helpful if cogl continues to build as we make incremental progress towards this. The first use of glib that this patch tackles is the use of g_return_val_if_fail and g_return_if_fail which have been replaced with equivalent _COGL_RETURN_VAL_IF_FAIL and _COGL_RETURN_IF_FAIL macros. Reviewed-by: Neil Roberts <neil@linux.intel.com>
104 lines
2.9 KiB
C
104 lines
2.9 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) 2008,2009,2010 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-util.h"
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#include "cogl-node-private.h"
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void
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_cogl_pipeline_node_init (CoglNode *node)
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{
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node->parent = NULL;
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COGL_LIST_INIT (&node->children);
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}
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void
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_cogl_pipeline_node_set_parent_real (CoglNode *node,
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CoglNode *parent,
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CoglNodeUnparentVFunc unparent,
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gboolean take_strong_reference)
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{
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/* NB: the old parent may indirectly be keeping the new parent alive
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* so we have to ref the new parent before unrefing the old.
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*
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* Note: we take a reference here regardless of
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* take_strong_reference because weak children may need special
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* handling when the parent disposes itself which relies on a
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* consistent link to all weak nodes. Once the node is linked to its
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* parent then we remove the reference at the end if
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* take_strong_reference == FALSE. */
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cogl_object_ref (parent);
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if (node->parent)
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unparent (node);
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COGL_LIST_INSERT_HEAD (&parent->children, node, list_node);
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node->parent = parent;
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node->has_parent_reference = take_strong_reference;
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/* Now that there is a consistent parent->child link we can remove
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* the parent reference if no reference was requested. If it turns
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* out that the new parent was only being kept alive by the old
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* parent then it will be disposed of here. */
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if (!take_strong_reference)
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cogl_object_unref (parent);
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}
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void
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_cogl_pipeline_node_unparent_real (CoglNode *node)
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{
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CoglNode *parent = node->parent;
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if (parent == NULL)
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return;
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_COGL_RETURN_IF_FAIL (!COGL_LIST_EMPTY (&parent->children));
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COGL_LIST_REMOVE (node, list_node);
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if (node->has_parent_reference)
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cogl_object_unref (parent);
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node->parent = NULL;
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}
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void
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_cogl_pipeline_node_foreach_child (CoglNode *node,
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CoglNodeChildCallback callback,
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void *user_data)
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{
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CoglNode *child, *next;
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COGL_LIST_FOREACH_SAFE (child, &node->children, list_node, next)
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callback (child, user_data);
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}
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