Fix T62434: EEVEE not using correct World Output node

We were already getting the designated output node in
'ntreeGPUMaterialNodes()' but this wasnt used in 'ntreeExecGPUNodes()',
instead whatever node was tagged NODE_DO_OUTPUT was executed.

note: this is just the bare minimum to fix the bug, other improvements
previously done in D4482 might follow as a separate commit.

Reviewers: brecht, fclem

Maniphest Tasks: T62434

Differential Revision: https://developer.blender.org/D4630

4 files changed, 5 insertions, 5 deletions

diff --git a/source/blender/nodes/shader/node_shader_tree.c b/source/blender/nodes/shader/node_shader_tree.c
index a4356dabfc0..9f01d2ab254 100644
--- a/source/blender/nodes/shader/node_shader_tree.c
+++ b/source/blender/nodes/shader/node_shader_tree.c
@@ -844,7 +844,7 @@ void ntreeGPUMaterialNodes(bNodeTree *localtree, GPUMaterial *mat, bool *has_sur
 	ntree_shader_tag_nodes(localtree, output, &tags);
 
 	exec = ntreeShaderBeginExecTree(localtree);
-	ntreeExecGPUNodes(exec, mat, 1);
+	ntreeExecGPUNodes(exec, mat, output);
 	ntreeShaderEndExecTree(exec);
 
 	/* EEVEE: Find which material domain was used (volume, surface ...). */
diff --git a/source/blender/nodes/shader/node_shader_util.c b/source/blender/nodes/shader/node_shader_util.c
index cc2032a7ba5..19bfd755928 100644
--- a/source/blender/nodes/shader/node_shader_util.c
+++ b/source/blender/nodes/shader/node_shader_util.c
@@ -201,7 +201,7 @@ bNode *nodeGetActiveTexture(bNodeTree *ntree)
 	return inactivenode;
 }
 
-void ntreeExecGPUNodes(bNodeTreeExec *exec, GPUMaterial *mat, int do_outputs)
+void ntreeExecGPUNodes(bNodeTreeExec *exec, GPUMaterial *mat, bNode *output_node)
 {
 	bNodeExec *nodeexec;
 	bNode *node;
@@ -220,7 +220,7 @@ void ntreeExecGPUNodes(bNodeTreeExec *exec, GPUMaterial *mat, int do_outputs)
 		do_it = false;
 		/* for groups, only execute outputs for edited group */
 		if (node->typeinfo->nclass == NODE_CLASS_OUTPUT) {
-			if (do_outputs && (node->flag & NODE_DO_OUTPUT))
+			if ((output_node != NULL) && (node == output_node))
 				do_it = true;
 		}
 		else {
diff --git a/source/blender/nodes/shader/node_shader_util.h b/source/blender/nodes/shader/node_shader_util.h
index 1eca3b8721e..e457f2f8b56 100644
--- a/source/blender/nodes/shader/node_shader_util.h
+++ b/source/blender/nodes/shader/node_shader_util.h
@@ -88,6 +88,6 @@ void node_gpu_stack_from_data(struct GPUNodeStack *gs, int type, struct bNodeSta
 void node_data_from_gpu_stack(struct bNodeStack *ns, struct GPUNodeStack *gs);
 void node_shader_gpu_tex_mapping(struct GPUMaterial *mat, struct bNode *node, struct GPUNodeStack *in, struct GPUNodeStack *out);
 
-void ntreeExecGPUNodes(struct bNodeTreeExec *exec, struct GPUMaterial *mat, int do_outputs);
+void ntreeExecGPUNodes(struct bNodeTreeExec *exec, struct GPUMaterial *mat, struct bNode *output_node);
 
 #endif
diff --git a/source/blender/nodes/shader/nodes/node_shader_common.c b/source/blender/nodes/shader/nodes/node_shader_common.c
index 8596c770c62..b9c9093a065 100644
--- a/source/blender/nodes/shader/nodes/node_shader_common.c
+++ b/source/blender/nodes/shader/nodes/node_shader_common.c
@@ -207,7 +207,7 @@ static int gpu_group_execute(GPUMaterial *mat, bNode *node, bNodeExecData *execd
 		return 0;
 
 	group_gpu_copy_inputs(node, in, exec->stack);
-	ntreeExecGPUNodes(exec, mat, 0);
+	ntreeExecGPUNodes(exec, mat, NULL);
 	group_gpu_move_outputs(node, out, exec->stack);
 
 	return 1;