1 files changed, 24 insertions, 0 deletions
diff --git a/source/blender/nodes/shader/node_shader_util.c b/source/blender/nodes/shader/node_shader_util.c
index a2b18b61480..cf58846a051 100644
--- a/source/blender/nodes/shader/node_shader_util.c
+++ b/source/blender/nodes/shader/node_shader_util.c
@@ -258,6 +258,30 @@ void ntreeExecGPUNodes(bNodeTreeExec *exec, GPUMaterial *mat, bNode *output_node
   }
 }
 
+void node_shader_gpu_bump_tex_coord(GPUMaterial *mat, bNode *node, GPUNodeLink **link)
+{
+  if (node->branch_tag == 1) {
+    /* Add one time the value fo derivative to the input vector. */
+    GPU_link(mat, "dfdx_v3", *link, link);
+  }
+  else if (node->branch_tag == 2) {
+    /* Add one time the value fo derivative to the input vector. */
+    GPU_link(mat, "dfdy_v3", *link, link);
+  }
+  else {
+    /* nothing to do, reference center value. */
+  }
+}
+
+void node_shader_gpu_default_tex_coord(GPUMaterial *mat, bNode *node, GPUNodeLink **link)
+{
+  if (!*link) {
+    *link = GPU_attribute(CD_ORCO, "");
+    GPU_link(mat, "generated_texco", GPU_builtin(GPU_VIEW_POSITION), *link, link);
+    node_shader_gpu_bump_tex_coord(mat, node, link);
+  }
+}
+
 void node_shader_gpu_tex_mapping(GPUMaterial *mat,
                                  bNode *node,
                                  GPUNodeStack *in,