static void *group_initexec(bNodeExecContext *context, bNode *node, bNodeInstanceKey key)
{
bNodeTree *ngroup = (bNodeTree *)node->id;
bNodeTreeExec *exec;
if (!ngroup)
return NULL;
/* initialize the internal node tree execution */
exec = ntreeShaderBeginExecTree_internal(context, ngroup, key);
return exec;
}
bNodeTreeExec *ntreeShaderBeginExecTree(bNodeTree *ntree)
{
bNodeExecContext context;
bNodeTreeExec *exec;
/* XXX hack: prevent exec data from being generated twice.
* this should be handled by the renderer!
*/
if (ntree->execdata)
return ntree->execdata;
context.previews = ntree->previews;
exec = ntreeShaderBeginExecTree_internal(&context, ntree, NODE_INSTANCE_KEY_BASE);
/* XXX this should not be necessary, but is still used for cmp/sha/tex nodes,
* which only store the ntree pointer. Should be fixed at some point!
*/
ntree->execdata = exec;
return exec;
}
