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.

2 files changed, 14 insertions, 3 deletions

diff --git a/source/blender/render/extern/include/RE_engine.h b/source/blender/render/extern/include/RE_engine.h
index 2376aeca55e..20024eab633 100644
--- a/source/blender/render/extern/include/RE_engine.h
+++ b/source/blender/render/extern/include/RE_engine.h
@@ -35,6 +35,8 @@
 #include "DNA_listBase.h"
 #include "RNA_types.h"
 
+struct bNode;
+struct bNodeTree;
 struct Object;
 struct Render;
 struct RenderEngine;
@@ -75,6 +77,8 @@ typedef struct RenderEngineType {
 	void (*view_update)(struct RenderEngine *engine, const struct bContext *context);
 	void (*view_draw)(struct RenderEngine *engine, const struct bContext *context);
 
+	void (*update_script_node)(struct RenderEngine *engine, struct bNodeTree *ntree, struct bNode *node);
+
 	/* RNA integration */
 	ExtensionRNA ext;
 } RenderEngineType;
@@ -94,6 +98,8 @@ typedef struct RenderEngine {
 	char *text;
 
 	int resolution_x, resolution_y;
+
+	struct ReportList *reports;
 } RenderEngine;
 
 RenderEngine *RE_engine_create(RenderEngineType *type);
diff --git a/source/blender/render/intern/source/external_engine.c b/source/blender/render/intern/source/external_engine.c
index 94146467145..076cad05c84 100644
--- a/source/blender/render/intern/source/external_engine.c
+++ b/source/blender/render/intern/source/external_engine.c
@@ -64,7 +64,7 @@
 static RenderEngineType internal_render_type = {
 	NULL, NULL,
 	"BLENDER_RENDER", N_("Blender Render"), RE_INTERNAL,
-	NULL, NULL, NULL, NULL,
+	NULL, NULL, NULL, NULL, NULL,
 	{NULL, NULL, NULL}
 };
 
@@ -73,7 +73,7 @@ static RenderEngineType internal_render_type = {
 static RenderEngineType internal_game_type = {
 	NULL, NULL,
 	"BLENDER_GAME", N_("Blender Game"), RE_INTERNAL | RE_GAME,
-	NULL, NULL, NULL, NULL,
+	NULL, NULL, NULL, NULL, NULL,
 	{NULL, NULL, NULL}
 };
 
@@ -292,7 +292,12 @@ void RE_engine_update_progress(RenderEngine *engine, float progress)
 
 void RE_engine_report(RenderEngine *engine, int type, const char *msg)
 {
-	BKE_report(engine->re->reports, type, msg);
+	Render *re = engine->re;
+
+	if (re)
+		BKE_report(engine->re->reports, type, msg);
+	else if(engine->reports)
+		BKE_report(engine->reports, type, msg);
 }
 
 /* Render */