Numerous fixes in Render code:

- Bug: material emit was ignored (showed in preview render backdrop)
- Bug: world exposure was ignored
- Bug: lamp halo was ignoring 'render layer light override'.

Further reshuffled the way shadows are being pre-calculated, this to enable
more advanced (and faster) usage of Material lightgroups. Now shadows are
being cached in lamps, using a per-sample counter to check if a recalc is
needed. Will also work (later) for Raytracing node shaders.

- New: Material LightGroup option "Always", which always shades the lights
  in the group, independent of visibility layer. (so it allows to move such
  lights to hidden layer, not influencing anything).

1 files changed, 8 insertions, 1 deletions

diff --git a/source/blender/render/intern/include/shading.h b/source/blender/render/intern/include/shading.h
index 38ed0f73e70..6c8f20673ed 100644
--- a/source/blender/render/intern/include/shading.h
+++ b/source/blender/render/intern/include/shading.h
@@ -28,6 +28,7 @@ struct ShadeResult;
 struct RenderPart;
 struct RenderLayer;
 struct PixStr;
+struct LampRen;
 
 /* shadeinput.c */
 
@@ -35,8 +36,12 @@ struct PixStr;
 /* needed to calculate shadow and AO for an entire pixel */
 typedef struct ShadeSample {
 	int tot;				/* amount of shi in use, can be 1 for not FULL_OSA */
+	
+	/* could be malloced once */
 	ShadeInput shi[16];		/* RE_MAX_OSA */
 	ShadeResult shr[16];	/* RE_MAX_OSA */
+	
+	int samplenr;			/* counter, detect shadow-reuse for shaders */
 } ShadeSample;
 
 
@@ -52,8 +57,10 @@ void shade_input_set_normals(struct ShadeInput *shi);
 void shade_input_set_shade_texco(struct ShadeInput *shi);
 void shade_input_do_shade(struct ShadeInput *shi, struct ShadeResult *shr);
 
+void shade_input_initialize(struct ShadeInput *shi, struct RenderPart *pa, struct RenderLayer *rl, int sample);
+
 void shade_sample_initialize(struct ShadeSample *ssamp, struct RenderPart *pa, struct RenderLayer *rl);
-void shade_samples_do_shadow(struct ShadeSample *ssamp);
+void shade_samples_do_AO(struct ShadeSample *ssamp);
 int shade_samples(struct ShadeSample *ssamp, struct PixStr *ps, int x, int y);
 
 void vlr_set_uv_indices(struct VlakRen *vlr, int *i1, int *i2, int *i3);