J-key render switching back, now with 10 slots.

Implementation note: this was done by giving each Render a slot number,
and for every slot a new Render will be created. Not sure if this is
ideal, but it ensures that all passes, render info, etc are separate so
you can also compare render layers and passes, in 2.4x only whatever it
was currently displaying was backed up.

1 files changed, 15 insertions, 2 deletions

diff --git a/source/blender/render/extern/include/RE_pipeline.h b/source/blender/render/extern/include/RE_pipeline.h
index a90220b9c1b..4084958488c 100644
--- a/source/blender/render/extern/include/RE_pipeline.h
+++ b/source/blender/render/extern/include/RE_pipeline.h
@@ -146,8 +146,21 @@ typedef struct RenderStats {
 
 /* the name is used as identifier, so elsewhere in blender the result can retrieved */
 /* calling a new render with same name, frees automatic existing render */
-struct Render *RE_NewRender (const char *name);
-struct Render *RE_GetRender(const char *name);
+struct Render *RE_NewRender (const char *name, int slot);
+struct Render *RE_GetRender(const char *name, int slot);
+
+/* render slots. for most cases like baking or preview render this will
+   always be default, for actual render multiple slots can be used. in
+   that case 'rendering' is the slot being rendered to, and 'view' is the
+   slot being viewed. these are always the same except if the currently
+   viewed slot is changed during render, at the end they will be synced. */
+#define RE_SLOT_RENDERING	-2
+#define RE_SLOT_VIEW		-1
+#define RE_SLOT_DEFAULT		 0
+#define RE_SLOT_MAX			10
+
+void RE_SetViewSlot(int slot);
+int RE_GetViewSlot(void);
 
 /* returns 1 while render is working (or renders called from within render) */
 int RE_RenderInProgress(struct Render *re);