Render API: shader script node for custom shaders.

* Shader script node added, which stores either a link to a text datablock or
  file on disk, and has functions to add and remove sockets.
* Callback RenderEngine.update_script_node(self, node) added for render engines
  to compile the shader and update the node with new sockets.

Thanks to Thomas, Lukas and Dalai for the implementation.

1 files changed, 20 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_node_types.h b/source/blender/makesdna/DNA_node_types.h
index aa382632b7b..bebe2ba20d5 100644
--- a/source/blender/makesdna/DNA_node_types.h
+++ b/source/blender/makesdna/DNA_node_types.h
@@ -703,6 +703,26 @@ typedef struct NodeTrackPosData {
 	char track_name[64];
 } NodeTrackPosData;
 
+typedef struct NodeShaderScript {
+	int mode;
+	int flag;
+
+	char filepath[1024]; /* 1024 = FILE_MAX */
+
+	char bytecode_hash[64];
+	char *bytecode;
+
+	IDProperty *prop;
+} NodeShaderScript;
+
+/* script node mode */
+#define NODE_SCRIPT_INTERNAL		0
+#define NODE_SCRIPT_EXTERNAL		1
+
+/* script node flag */
+#define NODE_SCRIPT_AUTO_UPDATE		1
+
+
 /* frame node flags */
 #define NODE_FRAME_SHRINK		1	/* keep the bounding box minimal */
 #define NODE_FRAME_RESIZEABLE	2	/* test flag, if frame can be resized by user */