1 files changed, 103 insertions, 0 deletions
diff --git a/source/blender/nodes/shader/nodes/node_shader_attribute.cc b/source/blender/nodes/shader/nodes/node_shader_attribute.cc
new file mode 100644
index 00000000000..f0965e3a476
--- /dev/null
+++ b/source/blender/nodes/shader/nodes/node_shader_attribute.cc
@@ -0,0 +1,103 @@
+/*
+ * 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) 2005 Blender Foundation.
+ * All rights reserved.
+ */
+
+#include "../node_shader_util.h"
+
+namespace blender::nodes::node_shader_attribute_cc {
+
+/* **************** OUTPUT ******************** */
+
+static bNodeSocketTemplate sh_node_attribute_out[] = {
+    {SOCK_RGBA, N_("Color")},
+    {SOCK_VECTOR, N_("Vector"), 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
+    {SOCK_FLOAT, N_("Fac"), 0.0f, 0.0f, 0.0f, 0.0f, -FLT_MAX, FLT_MAX, PROP_FACTOR},
+    {SOCK_FLOAT, N_("Alpha"), 0.0f, 0.0f, 0.0f, 0.0f, -FLT_MAX, FLT_MAX, PROP_FACTOR},
+    {-1, ""},
+};
+
+static void node_shader_init_attribute(bNodeTree *UNUSED(ntree), bNode *node)
+{
+  NodeShaderAttribute *attr = MEM_cnew<NodeShaderAttribute>("NodeShaderAttribute");
+  node->storage = attr;
+}
+
+static int node_shader_gpu_attribute(GPUMaterial *mat,
+                                     bNode *node,
+                                     bNodeExecData *UNUSED(execdata),
+                                     GPUNodeStack *in,
+                                     GPUNodeStack *out)
+{
+  NodeShaderAttribute *attr = static_cast<NodeShaderAttribute *>(node->storage);
+  bool is_varying = attr->type == SHD_ATTRIBUTE_GEOMETRY;
+
+  if (GPU_material_is_volume_shader(mat) && is_varying) {
+    if (out[0].hasoutput) {
+      out[0].link = GPU_volume_grid(mat, attr->name, GPU_VOLUME_DEFAULT_0);
+    }
+    if (out[1].hasoutput) {
+      out[1].link = GPU_volume_grid(mat, attr->name, GPU_VOLUME_DEFAULT_0);
+    }
+    if (out[2].hasoutput) {
+      out[2].link = GPU_volume_grid(mat, attr->name, GPU_VOLUME_DEFAULT_0);
+    }
+    if (out[3].hasoutput) {
+      static const float default_alpha = 1.0f;
+      out[3].link = GPU_constant(&default_alpha);
+    }
+
+    return 1;
+  }
+
+  GPUNodeLink *cd_attr;
+
+  if (is_varying) {
+    cd_attr = GPU_attribute(mat, CD_AUTO_FROM_NAME, attr->name);
+  }
+  else {
+    cd_attr = GPU_uniform_attribute(mat, attr->name, attr->type == SHD_ATTRIBUTE_INSTANCER);
+  }
+
+  GPU_stack_link(mat, node, "node_attribute", in, out, cd_attr);
+
+  /* for each output. */
+  for (int i = 0; sh_node_attribute_out[i].type != -1; i++) {
+    node_shader_gpu_bump_tex_coord(mat, node, &out[i].link);
+  }
+
+  return 1;
+}
+
+}  // namespace blender::nodes::node_shader_attribute_cc
+
+/* node type definition */
+void register_node_type_sh_attribute()
+{
+  namespace file_ns = blender::nodes::node_shader_attribute_cc;
+
+  static bNodeType ntype;
+
+  sh_node_type_base(&ntype, SH_NODE_ATTRIBUTE, "Attribute", NODE_CLASS_INPUT, 0);
+  node_type_socket_templates(&ntype, nullptr, file_ns::sh_node_attribute_out);
+  node_type_init(&ntype, file_ns::node_shader_init_attribute);
+  node_type_storage(
+      &ntype, "NodeShaderAttribute", node_free_standard_storage, node_copy_standard_storage);
+  node_type_gpu(&ntype, file_ns::node_shader_gpu_attribute);
+
+  nodeRegisterType(&ntype);
+}