node_shader_dynamic.c

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version. 
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2007 Blender Foundation.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): Nathan Letwory
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/* TODO, support python3.x */
#undef WITH_PYTHON 

#ifdef WITH_PYTHON
#include <Python.h>
#include <compile.h>
#include <eval.h>
#endif

#include "DNA_text_types.h"
#include "BKE_text.h"


// XXX
#if 0
#ifdef WITH_PYTHON
#include "api2_2x/Node.h"
#include "api2_2x/gen_utils.h"
#include "BPY_extern.h"
#endif
#endif

#include "node_shader_util.h"

// XXX
#if 0
static void node_dynamic_setup(bNode *node);
static void node_dynamic_exec_cb(void *data, bNode *node, bNodeStack **in, bNodeStack **out);
static void node_dynamic_free_storage_cb(bNode *node);

#ifdef WITH_PYTHON
static PyObject *init_dynamicdict(void)
{
    PyObject *newscriptdict, *item;
    PyGILState_STATE gilstate = PyGILState_Ensure();

    newscriptdict= PyDict_New();

    PyDict_SetItemString(newscriptdict, "__builtins__", PyEval_GetBuiltins());
    item= PyString_FromString("__main__");
    PyDict_SetItemString(newscriptdict, "__name__", item);
    Py_DECREF(item);

    PyGILState_Release(gilstate);

    return newscriptdict;
}
#endif

static bNodeType *node_dynamic_find_typeinfo(ListBase *list, ID *id)
{
    bNodeType *ntype = list->first;

    while(ntype) {
        if (ntype->type == NODE_DYNAMIC && ntype->id == id)
            break;
        ntype = ntype->next;
    }

    return ntype; /* NULL if doesn't exist */
}

static void node_dynamic_free_typeinfo_sockets(bNodeType *tinfo)
{
    bNodeSocketTemplate *sock;

    if (!tinfo) return;

    if (tinfo->inputs) {
        sock = tinfo->inputs;
        while (sock->type != -1) {
            MEM_freeN(sock->name);
            sock++;
        }
        MEM_freeN(tinfo->inputs);
        tinfo->inputs = NULL;
    }
    if (tinfo->outputs) {
        sock = tinfo->outputs;
        while (sock->type != -1) {
            MEM_freeN(sock->name);
            sock++;
        }
        MEM_freeN(tinfo->outputs);
        tinfo->outputs = NULL;
    }
}

static void node_dynamic_free_typeinfo(bNodeType *tinfo)
{
    if (!tinfo) return;

    node_dynamic_free_typeinfo_sockets(tinfo);

    if (tinfo->name) { MEM_freeN(tinfo->name); }

    MEM_freeN(tinfo);
}

static void node_dynamic_free_sockets(bNode *node)
{
    BLI_freelistN(&node->inputs);
    BLI_freelistN(&node->outputs);
}

/* For now we just remove the socket links. It's the safest
 * route, since an update in the script may change completely the
 * inputs and outputs. Trying to recreate the node links would be
 * nicer for pynode authors, though. */
static void node_dynamic_update_socket_links(bNode *node, bNodeTree *ntree)
{
    if (ntree) {
        nodeVerifyType(ntree, node);
    }
    else {
        Material *ma;

        for (ma= G.main->mat.first; ma; ma= ma->id.next) {
            if (ma->nodetree) {
                bNode *nd;
                for (nd= ma->nodetree->nodes.first; nd; nd = nd->next) {
                    if (nd == node) nodeVerifyType(ma->nodetree, node);
                }
            }
        }
    }
}

static void node_dynamic_free_storage_cb(bNode *node)
{
#ifdef WITH_PYTHON
    NodeScriptDict *nsd;
    PyObject *pydict;
    BPy_Node *pynode;

    if (!node->storage) return;
    nsd = (NodeScriptDict *)(node->storage);
    pydict = nsd->dict;
    if (pydict) {
        Py_DECREF(pydict);
    }
    pynode = nsd->node;
    if (pynode) {
        Py_DECREF(pynode);
    }
#endif
    MEM_freeN(node->storage);
    node->storage = NULL;
}

/* Disable pynode when its script fails */
static void node_dynamic_disable(bNode *node)
{
    node->custom1 = 0;
    node->custom1 = BSET(node->custom1, NODE_DYNAMIC_ERROR);
}

/* Disable all pynodes using the given text (script) id */
static void node_dynamic_disable_all_by_id(ID *id)
{
#ifdef WITH_PYTHON
    Material *ma; /* XXX hardcoded for shaders */

    for (ma= G.main->mat.first; ma; ma= ma->id.next) {
        if (ma->nodetree) {
            bNode *nd;
            bNodeTree *ntree = ma->nodetree;
            for (nd= ntree->nodes.first; nd; nd= nd->next) {
                if (nd->id == id) {
                    nd->custom1 = 0;
                    nd->custom1 = BSET(nd->custom1, NODE_DYNAMIC_ERROR);
                }
            }
        }
    }
#endif
}

static void node_rem_socklist_links(bNodeTree *ntree, ListBase *lb)
{
    bNodeLink *link, *next;
    bNodeSocket *sock;

    if (!lb) return;

    for (sock= lb->first; sock; sock= sock->next) {
        for (link= ntree->links.first; link; link= next) {
            next= link->next;
            if (link->fromsock==sock || link->tosock==sock) {
                nodeRemLink(ntree, link);
            }
        }
    }
}

/* XXX hardcoded for shaders */
static void node_dynamic_rem_all_links(bNodeType *tinfo)
{
    Material *ma;
    int in, out;

    in = tinfo->inputs ? 1 : 0;
    out = tinfo->outputs ? 1 : 0;

    if (!in && !out) return;

    for (ma= G.main->mat.first; ma; ma= ma->id.next) {
        if (ma->nodetree) {
            bNode *nd;
            bNodeTree *ntree = ma->nodetree;
            for (nd= ntree->nodes.first; nd; nd= nd->next) {
                if (nd->typeinfo == tinfo) {
                    if (in)
                        node_rem_socklist_links(ntree, &nd->inputs);
                    if (out)
                        node_rem_socklist_links(ntree, &nd->outputs);
                }
            }
        }
    }
}

/* node_dynamic_reset: clean a pynode, getting rid of all
 * data dynamically created for it. */
static void node_dynamic_reset(bNode *node, int unlink_text)
{
    bNodeType *tinfo, *tinfo_default;
    Material *ma;

    tinfo = node->typeinfo;
    tinfo_default = node_dynamic_find_typeinfo(&node_all_shaders, NULL);

    if ((tinfo == tinfo_default) && unlink_text) {
        ID *textID = node->id;
    /* already at default (empty) state, which happens if this node's
     * script failed to parse at the first stage: definition. We're here
     * because its text was removed from Blender. */
        for (ma= G.main->mat.first; ma; ma= ma->id.next) {
            if (ma->nodetree) {
                bNode *nd;
                for (nd= ma->nodetree->nodes.first; nd; nd = nd->next) {
                    if (nd->id == textID) {
                        nd->id = NULL;
                        nd->custom1 = 0;
                        nd->custom1 = BSET(nd->custom1, NODE_DYNAMIC_NEW);
                        BLI_strncpy(nd->name, "Dynamic", 8);
                        return;
                    }
                }
            }
        }
    }

    node_dynamic_rem_all_links(tinfo);
    node_dynamic_free_typeinfo_sockets(tinfo);

    /* reset all other XXX shader nodes sharing this typeinfo */
    for (ma= G.main->mat.first; ma; ma= ma->id.next) {
        if (ma->nodetree) {
            bNode *nd;
            for (nd= ma->nodetree->nodes.first; nd; nd = nd->next) {
                if (nd->typeinfo == tinfo) {
                    node_dynamic_free_storage_cb(nd);
                    node_dynamic_free_sockets(nd);
                    //node_dynamic_update_socket_links(nd, ma->nodetree);
                    nd->typeinfo = tinfo_default;
                    if (unlink_text) {
                        nd->id = NULL;
                        nd->custom1 = 0;
                        nd->custom1 = BSET(nd->custom1, NODE_DYNAMIC_NEW);
                        BLI_strncpy(nd->name, "Dynamic", 8);
                    }
                }
            }
        }
    }

    /* XXX hardcoded for shaders: */
    if (tinfo->id) { BLI_remlink(&node_all_shaders, tinfo); }
    node_dynamic_free_typeinfo(tinfo);
}

/* Special case of the above function: for working pynodes
 * that were saved on a .blend but fail for some reason when
 * the file is opened. We need this because pynodes are initialized
 * before G.main. */
static void node_dynamic_reset_loaded(bNode *node)
{
    bNodeType *tinfo = node->typeinfo;

    node_dynamic_rem_all_links(tinfo);
    node_dynamic_free_typeinfo_sockets(tinfo);
    node_dynamic_free_storage_cb(node);
    /* XXX hardcoded for shaders: */
    if (tinfo->id) { BLI_remlink(&node_all_shaders, tinfo); }

    node_dynamic_free_typeinfo(tinfo);
    node->typeinfo = node_dynamic_find_typeinfo(&node_all_shaders, NULL);
}

int nodeDynamicUnlinkText(ID *txtid)
{
    Material *ma;
    bNode *nd;

    /* find one node that uses this text */
    for (ma= G.main->mat.first; ma; ma= ma->id.next) {
        if (ma->nodetree) {
            for (nd= ma->nodetree->nodes.first; nd; nd = nd->next) {
                if ((nd->type == NODE_DYNAMIC) && (nd->id == txtid)) {
                    node_dynamic_reset(nd, 1); /* found, reset all */
                    return 1;
                }
            }
        }
    }
    return 0; /* no pynodes used this text */
}

static void node_dynamic_pyerror_print(bNode *node)
{
#ifdef WITH_PYTHON
    PyGILState_STATE gilstate = PyGILState_Ensure();

    fprintf(stderr, "\nError in dynamic node script \"%s\":\n", node->name);
    if (PyErr_Occurred()) {
        PyErr_Print();
        PyErr_Clear();
        PySys_SetObject("last_traceback", NULL);
    }
    else { fprintf(stderr, "Not a valid dynamic node Python script.\n"); }

    PyGILState_Release(gilstate);
#endif
}

static void node_dynamic_register_type(bNode *node)
{
    nodeRegisterType(&node_all_shaders, node->typeinfo);
    /* nodeRegisterType copied it to a new one, so we
     * free the typeinfo itself, but not what it
     * points to: */
    MEM_freeN(node->typeinfo);
    node->typeinfo = node_dynamic_find_typeinfo(&node_all_shaders, node->id);
    MEM_freeN(node->typeinfo->name);
    node->typeinfo->name = BLI_strdup(node->name);
}

#ifdef WITH_PYTHON
/* node_dynamic_get_pynode:
 * Find the pynode definition from the script */
static PyObject *node_dynamic_get_pynode(PyObject *dict)
{
    PyObject *key= NULL;
    Py_ssize_t pos = 0;
    PyObject *value = NULL;

    /* script writer specified a node? */
    value = PyDict_GetItemString(dict, "__node__");

    if (value) {
        if (PyObject_TypeCheck(value, &PyType_Type)) {
            Py_INCREF(value);
            return value;
        }
        else {
            PyErr_SetString(PyExc_TypeError,
                "expected class object derived from Scripted node");
            return NULL;
        }
    }

    /* case not, search for it in the script's global dictionary */
    while (PyDict_Next(dict, &pos, &key, &value)) {
        /* skip names we know belong to other available objects */
        if (strcmp("Socket", PyString_AsString(key)) == 0)
            continue;
        else if (strcmp("Scripted", PyString_AsString(key)) == 0)
            continue;
        /* naive: we grab the first ob of type 'type': */
        else if (PyObject_TypeCheck(value, &PyType_Type)) {
            Py_INCREF(value);
            return value;
        }
    }

    PyErr_SetString(PyExc_TypeError,
        "no PyNode definition found in the script!");
    return NULL;
}
#endif /* WITH_PYTHON */

static int node_dynamic_parse(struct bNode *node)
{
#ifndef WITH_PYTHON
    return -1;
#else
    PyObject *dict= NULL;
    PyObject *pynode_data= NULL;
    PyObject *pynode= NULL;
    PyObject *args= NULL;
    NodeScriptDict *nsd = NULL;
    PyObject *pyresult = NULL;
    char *buf = NULL;
    int is_valid_script = 0;
    PyGILState_STATE gilstate;

    if (!node->id || !node->storage)
        return 0;

    /* READY, no need to be here */
    if (BTST(node->custom1, NODE_DYNAMIC_READY))
        return 0;

    /* for threading */
    gilstate = PyGILState_Ensure();

    nsd = (NodeScriptDict *)node->storage;

    dict = (PyObject *)(nsd->dict);
    buf = txt_to_buf((Text *)node->id);

    pyresult = PyRun_String(buf, Py_file_input, dict, dict);

    MEM_freeN(buf);

    if (!pyresult) {
        if (BTST(node->custom1, NODE_DYNAMIC_LOADED)) {
            node_dynamic_disable(node);
        } else {
        node_dynamic_disable_all_by_id(node->id);
        }
        node_dynamic_pyerror_print(node);
        PyGILState_Release(gilstate);
        return -1;
    }

    Py_DECREF(pyresult);

    pynode_data = node_dynamic_get_pynode(dict);

    if (pynode_data) {
        BPy_NodeSocketLists *socklists = Node_CreateSocketLists(node);

        args = Py_BuildValue("(O)", socklists);

        /* init it to get the input and output sockets */
        pynode = PyObject_Call(pynode_data, args, NULL);

        Py_DECREF(pynode_data);
        Py_DECREF(socklists);
        Py_DECREF(args);

        if (!PyErr_Occurred() && pynode && pytype_is_pynode(pynode)) {
            InitNode((BPy_Node *)(pynode), node);
            nsd->node = pynode;
            node->typeinfo->execfunc = node_dynamic_exec_cb;
            is_valid_script = 1;

            /* for NEW, LOADED, REPARSE */
            if (BNTST(node->custom1, NODE_DYNAMIC_ADDEXIST)) {
                node->typeinfo->pydict = dict;
                node->typeinfo->pynode = pynode;
                node->typeinfo->id = node->id;
                if (BNTST(node->custom1, NODE_DYNAMIC_LOADED))
                    nodeAddSockets(node, node->typeinfo);
                if (BNTST(node->custom1, NODE_DYNAMIC_REPARSE))
                    node_dynamic_register_type(node);
            }

            node->custom1 = 0;
            node->custom1 = BSET(node->custom1, NODE_DYNAMIC_READY);
        }
    }

    PyGILState_Release(gilstate);

    if (!is_valid_script) { /* not a valid pynode script */
        node_dynamic_disable_all_by_id(node->id);
        node_dynamic_pyerror_print(node);
        return -1;
    }

    return 0;
#endif
}

/* node_dynamic_setup: prepare for execution (state: NODE_DYNAMIC_READY)
 * pynodes already linked to a script (node->id != NULL). */
static void node_dynamic_setup(bNode *node)
{
#ifdef WITH_PYTHON
    NodeScriptDict *nsd = NULL;
    bNodeTree *nodetree = NULL;
    bNodeType *ntype = NULL;
    PyGILState_STATE gilstate;

    /* Possible cases:
     * NEW
     * ADDEXIST
     * LOADED
     * REPARSE
     * ERROR
     * READY
     */

    /* NEW, but not linked to a script: link default (empty) typeinfo */
    if (!node->id) {
        node->typeinfo = node_dynamic_find_typeinfo(&node_all_shaders,
                NULL);
        return;
    }

    /* READY, no need to be here */
    if (BTST(node->custom1, NODE_DYNAMIC_READY))
        return;

    gilstate = PyGILState_Ensure();

    /* ERROR, reset to (empty) defaults */
    if (BCLR(node->custom1, NODE_DYNAMIC_ERROR) == 0) {
        node_dynamic_reset(node, 0);
        PyGILState_Release(gilstate);
        return;
    }

    /* User asked to update this pynode, prepare it for reparsing */
    if (BTST(node->custom1, NODE_DYNAMIC_REPARSE)) {
        int needs_parsing = 1;

        node->custom1 = BSET(node->custom1, NODE_DYNAMIC_NEW);

        if (BTST(node->custom1, NODE_DYNAMIC_ERROR)) {
            node->custom1 = BCLR(node->custom1, NODE_DYNAMIC_REPARSE);
            ntype = node_dynamic_find_typeinfo(&node_all_shaders, node->id);

            if (ntype) {
                node->typeinfo = ntype;
                node->custom1 = BSET(node->custom1, NODE_DYNAMIC_ADDEXIST);
                node->custom1 = BCLR(node->custom1, NODE_DYNAMIC_ERROR);
                needs_parsing = 0;
            }
            else { nodeMakeDynamicType(node); }

        } else {
            node_dynamic_rem_all_links(node->typeinfo);
            node_dynamic_free_typeinfo_sockets(node->typeinfo);
            node_dynamic_update_socket_links(node, NULL);
            node_dynamic_free_storage_cb(node);
        }

        if (needs_parsing) {
            nsd = MEM_callocN(sizeof(NodeScriptDict), "node script dictionary");
            nsd->dict = init_dynamicdict();
            node->storage = nsd;
            /* prepared, now reparse: */
            node_dynamic_parse(node);
            PyGILState_Release(gilstate);
            return;
        }
    }
    else if (BTST(node->custom1, NODE_DYNAMIC_LOADED)) {
        /* when loading from a .blend we don't have G.main yet, so we
         * quickly abuse node->storage in ntreeInitTypes (node.c) to have
         * our nodetree ptr (needed if a pynode script that worked before
         * saving the .blend for some reason fails upon loading): */
        nodetree = (bNodeTree *)node->storage;
        node->storage = NULL;
    }

    if (node->storage)
        fprintf(stderr, "\nDEBUG: PYNODES ERROR: non NULL node->storage in node_dynamic_setup()\n");

    nsd = MEM_callocN(sizeof(NodeScriptDict), "node script dictionary");
    node->storage = nsd;
    
    /* NEW, LOADED or REPARSE */
    if (BNTST(node->custom1, NODE_DYNAMIC_ADDEXIST)) {
        /* check if there's already a bNodeType linked to this script */
        /* (XXX hardcoded for shader nodes for now) */
        ntype = node_dynamic_find_typeinfo(&node_all_shaders, node->id);

        if (ntype) { /* if so, reuse it */
            node->typeinfo = ntype;
            /* so this is actually an ADDEXIST type */
            node->custom1 = BSET(node->custom1, NODE_DYNAMIC_ADDEXIST);
        }
        else { /* create bNodeType for this pynode */
            nodeMakeDynamicType(node);
            nsd->dict = init_dynamicdict();
            if ((node_dynamic_parse(node) == -1) && nodetree) {
                node_dynamic_reset_loaded(node);
            }
            PyGILState_Release(gilstate);
            return;
        }
    }

    /* ADDEXIST: new pynode linked to an already registered dynamic type,
     * we just reuse existing py dict and pynode */
    nsd->dict = node->typeinfo->pydict;
    nsd->node = node->typeinfo->pynode;

    Py_INCREF((PyObject *)(nsd->dict));
    Py_INCREF((PyObject *)(nsd->node));

    if (BTST(node->custom1, NODE_DYNAMIC_NEW)) {
        nodeAddSockets(node, node->typeinfo);
        node->custom1 = BCLR(node->custom1, NODE_DYNAMIC_NEW);
    }

    node->custom1 = BCLR(node->custom1, NODE_DYNAMIC_ADDEXIST);
    node->custom1 = BSET(node->custom1, NODE_DYNAMIC_READY);

    PyGILState_Release(gilstate);
#endif /* WITH_PYTHON */
    return;
}

/* node_dynamic_init_cb callback: called when a pynode is created.
 * The pynode type is passed via node->custom2. It can be:
 *  0: for loaded empty nodes
 *  NODE_DYNAMIC_MENU: for the default Dynamic node type
 *  > NODE_DYNAMIC_MENU: for the new types defined by scripts
*/
static void node_dynamic_init_cb(bNode *node)
{
    int type = node->custom2;

    node->custom2 = 0;

    if (type >= NODE_DYNAMIC_MENU) {
        node->custom1 = 0;

        if (type == NODE_DYNAMIC_MENU) {
            node->custom1 = BSET(node->custom1, NODE_DYNAMIC_NEW);
            return;
        }

        node->custom1 = BSET(node->custom1, NODE_DYNAMIC_ADDEXIST);
        node->id = node->typeinfo->id;
    }

    node_dynamic_setup(node);
}

/* node_dynamic_copy_cb: pynode copy callback */
static void node_dynamic_copy_cb(bNode *orig_node, bNode *new_node)
{
#ifndef WITH_PYTHON
    return;
#else
    NodeScriptDict *nsd;
    PyGILState_STATE gilstate;

    if (!orig_node->storage) return;

    nsd = (NodeScriptDict *)(orig_node->storage);
    new_node->storage = MEM_dupallocN(orig_node->storage);

    gilstate = PyGILState_Ensure();

    if (nsd->node)
        Py_INCREF((PyObject *)(nsd->node));
    if (nsd->dict)
        Py_INCREF((PyObject *)(nsd->dict));

    PyGILState_Release(gilstate);
#endif
}

/* node_dynamic_exec_cb: the execution callback called per pixel
 * during rendering. */
static void node_dynamic_exec_cb(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
{
#ifndef WITH_PYTHON
    return;
#else
    BPy_Node *mynode = NULL;
    NodeScriptDict *nsd = NULL;
    PyObject *pyresult = NULL;
    PyObject *args = NULL;
    ShadeInput *shi;
    PyGILState_STATE gilstate;

    if (!node->id)
        return;

    /*if (G.scene->r.threads > 1)
        return;*/

    if (BTST2(node->custom1, NODE_DYNAMIC_NEW, NODE_DYNAMIC_REPARSE)) {
        node_dynamic_setup(node);
        return;
    }

    if (BTST(node->custom1, NODE_DYNAMIC_ERROR)) {
        if (node->storage) node_dynamic_setup(node);
        return;
    }

    if (BTST(node->custom1, NODE_DYNAMIC_READY)) {
        nsd = (NodeScriptDict *)node->storage;
        mynode = (BPy_Node *)(nsd->node);


        if (mynode && PyCallable_Check((PyObject *)mynode)) {

            gilstate = PyGILState_Ensure();

            mynode->node = node;
            shi = ((ShaderCallData *)data)->shi;

            Node_SetStack(mynode, in, NODE_INPUTSTACK);
            Node_SetStack(mynode, out, NODE_OUTPUTSTACK);
            Node_SetShi(mynode, shi);

            args=Py_BuildValue("()");
            pyresult= PyObject_Call((PyObject *)mynode, args, NULL);
            Py_DECREF(args);

            if (!pyresult) {
                PyGILState_Release(gilstate);
                node_dynamic_disable_all_by_id(node->id);
                node_dynamic_pyerror_print(node);
                node_dynamic_setup(node);
                return;
            }
            Py_DECREF(pyresult);
            PyGILState_Release(gilstate);
        }
    }
#endif
}

void register_node_type_sh_dynamic(bNodeTreeType *ttype)
{
    static bNodeType ntype;
    
    node_type_base(ttype, &ntype, NODE_DYNAMIC, "Dynamic", NODE_CLASS_OP_DYNAMIC, NODE_OPTIONS, NULL, NULL);
    node_type_compatibility(&ntype, NODE_OLD_SHADING);
    node_type_size(&ntype, 150, 60, 300);
    node_type_init(&ntype, node_dynamic_init_cb);
    node_type_storage(&ntype, "NodeScriptDict", node_dynamic_free_storage_cb, node_dynamic_copy_cb);
    node_type_exec(&ntype, node_dynamic_exec_cb);
    
    nodeRegisterType(ttype, &ntype);
}

#else

void register_node_type_sh_dynamic(bNodeTreeType *ttype)
{
    static bNodeType ntype;
    
    node_type_base(ttype, &ntype, NODE_DYNAMIC, "Dynamic", NODE_CLASS_OP_DYNAMIC, 0);
    node_type_compatibility(&ntype, NODE_OLD_SHADING);
    
    nodeRegisterType(ttype, &ntype);
}

#endif