static void *group_initexec(bNode *node)
{
bNodeTree *ngroup= (bNodeTree*)node->id;
bNodeTreeExec *exec;
/* initialize the internal node tree execution */
exec = ntreeShaderBeginExecTree(ngroup, 0);
return exec;
}
void ntreeGPUMaterialNodes(bNodeTree *ntree, GPUMaterial *mat, short compatibility)
{
/* localize tree to create links for reroute and mute */
bNodeTree *localtree = ntreeLocalize(ntree);
bNodeTreeExec *exec;
exec = ntreeShaderBeginExecTree(localtree);
ntreeExecGPUNodes(exec, mat, 1, compatibility);
ntreeShaderEndExecTree(exec);
ntreeFreeTree_ex(localtree, false);
MEM_freeN(localtree);
}
void ntreeGPUMaterialNodes(bNodeTree *ntree, GPUMaterial *mat, short compatibility)
{
/* localize tree to create links for reroute and mute */
bNodeTree *localtree = ntreeLocalize(ntree);
bNodeTreeExec *exec;
/* Perform all needed modifications on the tree in order to support
* displacement/bump mapping.
*/
ntree_shader_relink_displacement(localtree, compatibility);
exec = ntreeShaderBeginExecTree(localtree);
ntreeExecGPUNodes(exec, mat, 1, compatibility);
ntreeShaderEndExecTree(exec);
ntreeFreeTree_ex(localtree, false);
MEM_freeN(localtree);
}
/* only for Blender internal */
bool ntreeShaderExecTree(bNodeTree *ntree, ShadeInput *shi, ShadeResult *shr)
{
ShaderCallData scd;
/**
* \note: preserve material from ShadeInput for material id, nodetree execs change it
* fix for bug "[#28012] Mat ID messy with shader nodes"
*/
Material *mat = shi->mat;
bNodeThreadStack *nts = NULL;
bNodeTreeExec *exec = ntree->execdata;
int compat;
/* convert caller data to struct */
scd.shi = shi;
scd.shr = shr;
/* each material node has own local shaderesult, with optional copying */
memset(shr, 0, sizeof(ShadeResult));
/* ensure execdata is only initialized once */
if (!exec) {
BLI_lock_thread(LOCK_NODES);
if (!ntree->execdata)
ntree->execdata = ntreeShaderBeginExecTree(ntree);
BLI_unlock_thread(LOCK_NODES);
exec = ntree->execdata;
}
nts = ntreeGetThreadStack(exec, shi->thread);
compat = ntreeExecThreadNodes(exec, nts, &scd, shi->thread);
ntreeReleaseThreadStack(nts);
// \note: set material back to preserved material
shi->mat = mat;
/* better not allow negative for now */
if (shr->combined[0] < 0.0f) shr->combined[0] = 0.0f;
if (shr->combined[1] < 0.0f) shr->combined[1] = 0.0f;
if (shr->combined[2] < 0.0f) shr->combined[2] = 0.0f;
/* if compat is zero, it has been using non-compatible nodes */
return compat;
}