Giant commit!

A full detailed description of this will be done later... is several days
of work. Here's a summary:

Render:
- Full cleanup of render code, removing *all* globals and bad level calls
  all over blender. Render module is now not called abusive anymore
- API-fied calls to rendering
- Full recode of internal render pipeline. Is now rendering tiles by
  default, prepared for much smarter 'bucket' render later.
- Each thread now can render a full part
- Renders were tested with 4 threads, goes fine, apart from some lookup
  tables in softshadow and AO still
- Rendering is prepared to do multiple layers and passes
- No single 32 bits trick in render code anymore, all 100% floats now.

Writing images/movies
- moved writing images to blender kernel (bye bye 'schrijfplaatje'!)
- made a new Movie handle system, also in kernel. This will enable much
  easier use of movies in Blender

PreviewRender:
- Using new render API, previewrender (in buttons) now uses regular render
  code to generate images.
- new datafile 'preview.blend.c' has the preview scenes in it
- previews get rendered in exact displayed size (1 pixel = 1 pixel)

3D Preview render
- new; press Pkey in 3d window, for a panel that continuously renders
  (pkey is for games, i know... but we dont do that in orange now!)
- this render works nearly identical to buttons-preview render, so it stops
  rendering on any event (mouse, keyboard, etc)
- on moving/scaling the panel, the render code doesn't recreate all geometry
- same for shifting/panning view
- all other operations (now) regenerate the full render database still.
- this is WIP... but big fun, especially for simple scenes!

Compositor
- Using same node system as now in use for shaders, you can composit images
- works pretty straightforward... needs much more options/tools and integration
  with rendering still
- is not threaded yet, nor is so smart to only recalculate changes... will be
  done soon!
- the "Render Result" node will get all layers/passes as output sockets
- The "Output" node renders to a builtin image, which you can view in the Image
  window. (yes, output nodes to render-result, and to files, is on the list!)

The Bad News
- "Unified Render" is removed. It might come back in some stage, but this
  system should be built from scratch. I can't really understand this code...
  I expect it is not much needed, especially with advanced layer/passes
  control
- Panorama render, Field render, Motion blur, is not coded yet... (I had to
  recode every single feature in render, so...!)
- Lens Flare is also not back... needs total revision, might become composit
  effect though (using zbuffer for visibility)
- Part render is gone! (well, thats obvious, its default now).
- The render window is only restored with limited functionality... I am going
  to check first the option to render to a Image window, so Blender can become
  a true single-window application. :)
  For example, the 'Spare render buffer' (jkey) doesnt work.
- Render with border, now default creates a smaller image
- No zbuffers are written yet... on the todo!
- Scons files and MSVC will need work to get compiling again

OK... thats what I can quickly recall. Now go compiling!

6 files changed, 25 insertions, 31 deletions

diff --git a/source/blender/makesdna/DNA_image_types.h b/source/blender/makesdna/DNA_image_types.h
index 7b26a3c2b57..a6dca412d9c 100644
--- a/source/blender/makesdna/DNA_image_types.h
+++ b/source/blender/makesdna/DNA_image_types.h
@@ -50,7 +50,7 @@ typedef struct Image {
 	struct ImBuf *mipmap[10];
 	
 	short ok, flag;
-	short lastframe, lastquality;
+	short lastframe, pad;
 
 	/* texture page */
 	short tpageflag, totbind;
diff --git a/source/blender/makesdna/DNA_material_types.h b/source/blender/makesdna/DNA_material_types.h
index 6d8527d5896..15cee1a288e 100644
--- a/source/blender/makesdna/DNA_material_types.h
+++ b/source/blender/makesdna/DNA_material_types.h
@@ -49,16 +49,6 @@ struct ColorBand;
 struct Group;
 struct bNodeTree;
 
-typedef struct MaterialLayer {
-	struct MaterialLayer *next, *prev;
-	
-	struct Material *mat;
-	float blendfac;
-	short flag, blendmethod, menunr, pad;
-	int pad2;
-	
-} MaterialLayer;
-
 /* WATCH IT: change type? also make changes in ipo.h  */
 
 typedef struct Material {
@@ -109,7 +99,6 @@ typedef struct Material {
 	float rampfac_col, rampfac_spec;
 
 	struct MTex *mtex[10];
-	ListBase layers;
 	struct bNodeTree *nodetree;	
 	struct Ipo *ipo;
 	struct Group *group;	/* light group */
@@ -247,20 +236,14 @@ typedef struct Material {
 #define MAP_LAYER		16384
 
 /* pr_type */
-#define MA_FLAT			0
-#define MA_SPHERE		1
-#define MA_CUBE			2
+#define MA_SPHERE		0
+#define MA_CUBE			1
+#define MA_FLAT			2
+#define MA_MONKEY		3
+#define MA_SPHERE_A		4
 
 /* pr_back */
 #define MA_DARK			1
 
-/* MaterialLayer flag */
-#define ML_ACTIVE		1
-#define ML_RENDER		2
-#define ML_NEG_NORMAL	4
-#define ML_DIFFUSE		8
-#define ML_SPECULAR		16
-#define ML_ALPHA		32
-
 #endif
 
diff --git a/source/blender/makesdna/DNA_node_types.h b/source/blender/makesdna/DNA_node_types.h
index 85db0887f51..783a7bb05a5 100644
--- a/source/blender/makesdna/DNA_node_types.h
+++ b/source/blender/makesdna/DNA_node_types.h
@@ -47,9 +47,10 @@ typedef struct bNodeStack {
 	float vec[4];
 	float min, max;			/* min/max for values (UI writes it, execute might use it) */
 	void *data;
-	short hasinput;			/* hasinput is tagged before executing */
+	short hasinput;			/* when input has link, tagged before executing */
+	short hasoutput;		/* when output is linked, tagged before executing */
 	short datatype;			/* type of data pointer */
-	int pad1;
+	short pad1;
 } bNodeStack;
 
 /* ns->datatype, shadetree only */
@@ -157,7 +158,8 @@ typedef struct bNodeTree {
 	bNodeStack *stack1;				/* for other thread, easy to expand though... */
 	
 	int type, init;					/* set init on fileread */
-	int cur_index, pad;				/* sockets in groups have unique identifiers, adding new sockets always will increase this counter */
+	int stacksize;					/* amount of elements in stack */
+	int cur_index;					/* sockets in groups have unique identifiers, adding new sockets always will increase this counter */
 	struct bNodeType **alltypes;	/* type definitions, set on fileread, no read/write */
 	struct bNodeType *owntype;		/* for groups or dynamic trees, no read/write */
 	
diff --git a/source/blender/makesdna/DNA_object_types.h b/source/blender/makesdna/DNA_object_types.h
index 0f1cdb8368f..c34b14f30af 100644
--- a/source/blender/makesdna/DNA_object_types.h
+++ b/source/blender/makesdna/DNA_object_types.h
@@ -335,7 +335,7 @@ extern Object workob;
 #define BA_DO_IPO			32
 
 #define BA_FROMSET			128
-#define OB_DO_IMAT			256
+
 #define OB_FROMDUPLI		512
 #define OB_DONE				1024
 #define OB_RADIO			2048
diff --git a/source/blender/makesdna/DNA_scene_types.h b/source/blender/makesdna/DNA_scene_types.h
index 12de019dd16..3f84b812cfb 100644
--- a/source/blender/makesdna/DNA_scene_types.h
+++ b/source/blender/makesdna/DNA_scene_types.h
@@ -48,6 +48,7 @@ struct World;
 struct Scene;
 struct Image;
 struct Group;
+struct bNodeTree;
 
 typedef struct Base {
 	struct Base *next, *prev;
@@ -294,9 +295,12 @@ typedef struct Scene {
 	unsigned int lay;
 	
 	/* editmode stuff */
-	short selectmode, pad;
-	short proportional, prop_mode;
 	float editbutsize;                      /* size of normals */
+	short selectmode;
+	short proportional, prop_mode;
+	
+	short use_nodes;
+	struct bNodeTree *nodetree;	
 	
 	void *ed;
 	struct Radio *radio;
@@ -318,7 +322,7 @@ typedef struct Scene {
 	/* none of the dependancy graph  vars is mean to be saved */
 	struct  DagForest *theDag;
 	short dagisvalid, dagflags;
-	int dirty;
+	short dirty, recalc;				/* recalc = counterpart of ob->recalc */
 } Scene;
 
 
@@ -374,7 +378,7 @@ typedef struct Scene {
 #define R_PASSEPARTOUT	0x0004
 
 #define R_EXTENSION		0x0010
-#define R_OGL			0x0020
+#define R_NODE_PREVIEW	0x0020
 
 /* alphamode */
 #define R_ADDSKY		0
@@ -428,6 +432,9 @@ typedef struct Scene {
 #define SCE_CLEAN           0
 #define SCE_DIRTY           1
 
+/* sce->recalc (now in use by previewrender) */
+#define SCE_PRV_CHANGED		1
+
 /* sce->prop_mode (proportional falloff) */
 #define PROP_SMOOTH            0
 #define PROP_SPHERE            1
diff --git a/source/blender/makesdna/DNA_view3d_types.h b/source/blender/makesdna/DNA_view3d_types.h
index 9a5fd12dd0f..03c6aad6cf6 100644
--- a/source/blender/makesdna/DNA_view3d_types.h
+++ b/source/blender/makesdna/DNA_view3d_types.h
@@ -40,6 +40,7 @@ struct Tex;
 struct SpaceLink;
 struct Base;
 struct BoundBox;
+struct RenderInfo;
 
 /* This is needed to not let VC choke on near and far... old
  * proprietary MS extensions... */
@@ -92,6 +93,7 @@ typedef struct View3D {
 	struct Object *camera;
 	struct BGpic *bgpic;
 	struct View3D *localvd;
+	struct RenderInfo *ri;
 	
 	/**
 	 * The drawing mode for the 3d display. Set to OB_WIRE, OB_SOLID,