Patch #7897 Texture Nodes!

Robin (Frrr) Allen did a decent job on this, so we can also welcome him
as a member in the svn committers team to maintain it!

I do the first commit with some minor fixes:
- get Makefiles work
- fix rounding issue with tiles on unit faces
- removed UI includes from tex node

A nice doc in wiki is here:
http://wiki.blender.org/index.php/User:Frr/TexnodeManual

On the todo for Robin is:
- When using one or more Texture-input nodes, you cannot edit them by activating
  (as works now for Material nodes).
- The new "output node" option fails on the default case, when only one
  output node is active. It then shows often a blank menu. Will get fixed asap.
- When using a NodeTree-Texture as input node, the menu for 'active output'
  should not show. NodeTree should ignore other nodetrees to keep things sane
  for now.
- On a future todo is proper usage of "Dxt" and "Dyt" texture vectors for
  superior antialising of checkers/bricks.

General note; I know people are dying to get a full integrated shader system
with nodes. In theory we could merge this with Material Nodetrees... but I 
rather wait for a solid and very well thought out design proposal for this, 
also including design ideas for unifying with a shader language (GPU, CPU).
For the time being this is a nice extension of current textures. :)

8 files changed, 66 insertions, 21 deletions

diff --git a/source/blender/render/extern/include/RE_shader_ext.h b/source/blender/render/extern/include/RE_shader_ext.h
index 888474ffa18..2cee2673a26 100644
--- a/source/blender/render/extern/include/RE_shader_ext.h
+++ b/source/blender/render/extern/include/RE_shader_ext.h
@@ -183,6 +183,7 @@ typedef struct ShadeInput
 /* node shaders... */
 struct Tex;
 int	multitex_ext(struct Tex *tex, float *texvec, float *dxt, float *dyt, int osatex, struct TexResult *texres);
+int	multitex_thread(struct Tex *tex, float *texvec, float *dxt, float *dyt, int osatex, struct TexResult *texres, short thread, short which_output);
 
 /* shaded view and bake */
 struct Render;
diff --git a/source/blender/render/intern/include/pixelshading.h b/source/blender/render/intern/include/pixelshading.h
index c6b11b4af9a..799f5521017 100644
--- a/source/blender/render/intern/include/pixelshading.h
+++ b/source/blender/render/intern/include/pixelshading.h
@@ -53,8 +53,8 @@ int shadeHaloFloat(HaloRen *har,
 /**
  * Render the sky at pixel (x, y).
  */
-void shadeSkyPixel(float *collector, float fx, float fy);
-void shadeSkyView(float *colf, float *rco, float *view, float *dxyview);
+void shadeSkyPixel(float *collector, float fx, float fy, short thread);
+void shadeSkyView(float *colf, float *rco, float *view, float *dxyview, short thread);
 void shadeAtmPixel(struct SunSky *sunsky, float *collector, float fx, float fy, float distance);
 void shadeSunView(float *colf, float *view);
 /* ------------------------------------------------------------------------- */
diff --git a/source/blender/render/intern/include/texture.h b/source/blender/render/intern/include/texture.h
index be5471e07c4..c254b768292 100644
--- a/source/blender/render/intern/include/texture.h
+++ b/source/blender/render/intern/include/texture.h
@@ -53,11 +53,12 @@ struct ImBuf;
 /* texture.h */
 
 void do_halo_tex(struct HaloRen *har, float xn, float yn, float *colf);
-void do_sky_tex(float *rco, float *lo, float *dxyview, float *hor, float *zen, float *blend, int skyflag);
+void do_sky_tex(float *rco, float *lo, float *dxyview, float *hor, float *zen, float *blend, int skyflag, short thread);
 void do_material_tex(struct ShadeInput *shi);
 void do_lamp_tex(LampRen *la, float *lavec, struct ShadeInput *shi, float *colf, int effect);
 
 void init_render_textures(Render *re);
+void end_render_textures(void);
 
 void render_realtime_texture(struct ShadeInput *shi, struct Image *ima);
 
diff --git a/source/blender/render/intern/source/convertblender.c b/source/blender/render/intern/source/convertblender.c
index 1a387ad7466..4e4e27fe286 100644
--- a/source/blender/render/intern/source/convertblender.c
+++ b/source/blender/render/intern/source/convertblender.c
@@ -2272,6 +2272,7 @@ static void displace_render_face(Render *re, ObjectRen *obr, VlakRen *vlr, float
 
 	shi.vlr= vlr;		/* current render face */
 	shi.mat= vlr->mat;		/* current input material */
+	shi.thread= 0;
 	
 	/* Displace the verts, flag is set when done */
 	if (!vlr->v1->flag)
@@ -4407,6 +4408,7 @@ void RE_Database_Free(Render *re)
 
 	end_radio_render();
 	end_render_materials();
+	end_render_textures();
 	
 	if(re->wrld.aosphere) {
 		MEM_freeN(re->wrld.aosphere);
diff --git a/source/blender/render/intern/source/pixelshading.c b/source/blender/render/intern/source/pixelshading.c
index 60723963af9..af6093ab36c 100644
--- a/source/blender/render/intern/source/pixelshading.c
+++ b/source/blender/render/intern/source/pixelshading.c
@@ -511,7 +511,7 @@ static void fillBackgroundImage(float *collector, float fx, float fy)
 }
 
 /* Only view vector is important here. Result goes to colf[3] */
-void shadeSkyView(float *colf, float *rco, float *view, float *dxyview)
+void shadeSkyView(float *colf, float *rco, float *view, float *dxyview, short thread)
 {
 	float lo[3], zen[3], hor[3], blend, blendm;
 	int skyflag;
@@ -550,7 +550,7 @@ void shadeSkyView(float *colf, float *rco, float *view, float *dxyview)
 			SWAP(float, lo[1],  lo[2]);
 			
 		}
-		do_sky_tex(rco, lo, dxyview, hor, zen, &blend, skyflag);
+		do_sky_tex(rco, lo, dxyview, hor, zen, &blend, skyflag, thread);
 	}
 	
 	if(blend>1.0) blend= 1.0;
@@ -607,7 +607,7 @@ void shadeSunView(float *colf, float *view)
 /*
   Stuff the sky color into the collector.
  */
-void shadeSkyPixel(float *collector, float fx, float fy) 
+void shadeSkyPixel(float *collector, float fx, float fy, short thread) 
 {
 	float view[3], dxyview[2];
 
@@ -653,7 +653,7 @@ void shadeSkyPixel(float *collector, float fx, float fy)
 		}
 		
 		/* get sky color in the collector */
-		shadeSkyView(collector, NULL, view, dxyview);
+		shadeSkyView(collector, NULL, view, dxyview, thread);
 		collector[3] = 0.0f;
 	}
 	
diff --git a/source/blender/render/intern/source/rayshade.c b/source/blender/render/intern/source/rayshade.c
index f822d41bb85..46a7a1c556c 100644
--- a/source/blender/render/intern/source/rayshade.c
+++ b/source/blender/render/intern/source/rayshade.c
@@ -396,7 +396,7 @@ static void ray_fadeout_endcolor(float *col, ShadeInput *origshi, ShadeInput *sh
 		VECCOPY(shi->view, vec);
 		Normalize(shi->view);
 		
-		shadeSkyView(col, isec->start, shi->view, NULL);
+		shadeSkyView(col, isec->start, shi->view, NULL, shi->thread);
 		shadeSunView(col, shi->view);
 	}
 }
@@ -1627,7 +1627,7 @@ static void ray_ao_qmc(ShadeInput *shi, float *shadfac)
 				shadfac[2]+= (1.0f-skyfac)*R.wrld.horb + skyfac*R.wrld.zenb;
 			}
 			else {	/* WO_AOSKYTEX */
-				shadeSkyView(skycol, isec.start, view, dxyview);
+				shadeSkyView(skycol, isec.start, view, dxyview, shi->thread);
 				shadeSunView(skycol, shi->view);
 				shadfac[0]+= skycol[0];
 				shadfac[1]+= skycol[1];
@@ -1752,7 +1752,7 @@ static void ray_ao_spheresamp(ShadeInput *shi, float *shadfac)
 					shadfac[2]+= (1.0f-fac)*R.wrld.horb + fac*R.wrld.zenb;
 				}
 				else {	/* WO_AOSKYTEX */
-					shadeSkyView(skycol, isec.start, view, dxyview);
+					shadeSkyView(skycol, isec.start, view, dxyview, shi->thread);
 					shadeSunView(skycol, shi->view);
 					shadfac[0]+= skycol[0];
 					shadfac[1]+= skycol[1];
diff --git a/source/blender/render/intern/source/rendercore.c b/source/blender/render/intern/source/rendercore.c
index 1eb42bca569..c3b281f2a23 100644
--- a/source/blender/render/intern/source/rendercore.c
+++ b/source/blender/render/intern/source/rendercore.c
@@ -647,7 +647,7 @@ static void sky_tile(RenderPart *pa, RenderLayer *rl)
 				if(pass[3]<1.0f) {
 					
 					if(done==0) {
-						shadeSkyPixel(col, x, y);
+						shadeSkyPixel(col, x, y, pa->thread);
 						done= 1;
 					}
 					
diff --git a/source/blender/render/intern/source/texture.c b/source/blender/render/intern/source/texture.c
index 7ce66ff6d12..61e9d9cf412 100644
--- a/source/blender/render/intern/source/texture.c
+++ b/source/blender/render/intern/source/texture.c
@@ -43,11 +43,13 @@
 #include "DNA_meshdata_types.h"
 #include "DNA_material_types.h"
 #include "DNA_image_types.h"
+#include "DNA_node_types.h"
 
 #include "IMB_imbuf_types.h"
 #include "IMB_imbuf.h"
 
 #include "BKE_image.h"
+#include "BKE_node.h"
 #include "BKE_plugin_types.h"
 #include "BKE_utildefines.h"
 
@@ -114,6 +116,10 @@ void init_render_texture(Render *re, Tex *tex)
 			}
 		}
 	}
+	
+	if(tex->nodetree && tex->use_nodes) {
+		ntreeBeginExecTree(tex->nodetree); /* has internal flag to detect it only does it once */
+	}
 }
 
 /* ------------------------------------------------------------------------- */
@@ -129,6 +135,20 @@ void init_render_textures(Render *re)
 	}
 }
 
+void end_render_texture(Tex *tex)
+{
+	if(tex && tex->use_nodes && tex->nodetree)
+		ntreeEndExecTree(tex->nodetree);
+}
+
+void end_render_textures(void)
+{
+	Tex *tex;
+	for(tex= G.main->tex.first; tex; tex= tex->id.next)
+		if(tex->id.us)
+			end_render_texture(tex);
+}
+
 /* ------------------------------------------------------------------------- */
 
 
@@ -691,6 +711,19 @@ static float voronoiTex(Tex *tex, float *texvec, TexResult *texres)
 
 }
 
+/* ------------------------------------------------------------------------- */
+
+static int evalnodes(Tex *tex, float *texvec, TexResult *texres, short thread, short which_output)
+{
+	short rv = TEX_INT;
+	bNodeTree *nodes = tex->nodetree;
+	
+	ntreeTexExecTree(nodes, texres, texvec, 0, thread, tex, which_output);
+	
+	if(texres->nor) rv |= TEX_NOR;
+	rv |= TEX_RGB;
+	return rv;
+}
 
 /* ------------------------------------------------------------------------- */
 
@@ -1130,13 +1163,17 @@ static void do_2d_mapping(MTex *mtex, float *t, VlakRen *vlr, float *n, float *d
 
 /* ************************************** */
 
-static int multitex(Tex *tex, float *texvec, float *dxt, float *dyt, int osatex, TexResult *texres)
+static int multitex(Tex *tex, float *texvec, float *dxt, float *dyt, int osatex, TexResult *texres, short thread, short which_output)
 {
 	float tmpvec[3];
 	int retval=0; /* return value, int:0, col:1, nor:2, everything:3 */
 
 	texres->talpha= 0;	/* is set when image texture returns alpha (considered premul) */
 	
+	if(tex->use_nodes && tex->nodetree) {
+		retval = evalnodes(tex, texvec, texres, thread, which_output);
+	}
+	else
 	switch(tex->type) {
 	
 	case 0:
@@ -1236,7 +1273,11 @@ static int multitex(Tex *tex, float *texvec, float *dxt, float *dyt, int osatex,
  * the color values are set before using the r/g/b values, otherwise you may use uninitialized values - Campbell */
 int multitex_ext(Tex *tex, float *texvec, float *dxt, float *dyt, int osatex, TexResult *texres)
 {
-	
+	return multitex_thread(tex, texvec, dxt, dyt, osatex, texres, 0, 0);
+}
+
+int multitex_thread(Tex *tex, float *texvec, float *dxt, float *dyt, int osatex, TexResult *texres, short thread, short which_output)
+{
 	if(tex==NULL) {
 		memset(texres, 0, sizeof(TexResult));
 		return 0;
@@ -1264,10 +1305,10 @@ int multitex_ext(Tex *tex, float *texvec, float *dxt, float *dyt, int osatex, Te
 		
 		do_2d_mapping(&mtex, texvec_l, NULL, NULL, dxt_l, dyt_l);
 
-		return multitex(tex, texvec_l, dxt_l, dyt_l, osatex, texres);
+		return multitex(tex, texvec_l, dxt_l, dyt_l, osatex, texres, thread, which_output);
 	}
 	else
-		return multitex(tex, texvec, dxt, dyt, osatex, texres);
+		return multitex(tex, texvec, dxt, dyt, osatex, texres, thread, which_output);
 }
 
 /* ------------------------------------------------------------------------- */
@@ -1671,7 +1712,7 @@ void do_material_tex(ShadeInput *shi)
 				}
 			}
 
-			rgbnor= multitex(tex, texvec, dxt, dyt, shi->osatex, &texres);
+			rgbnor= multitex(tex, texvec, dxt, dyt, shi->osatex, &texres, shi->thread, mtex->which_output);
 
 			/* texture output */
 
@@ -2055,7 +2096,7 @@ void do_halo_tex(HaloRen *har, float xn, float yn, float *colf)
 
 	if(mtex->tex->type==TEX_IMAGE) do_2d_mapping(mtex, texvec, NULL, NULL, dxt, dyt);
 	
-	rgb= multitex(mtex->tex, texvec, dxt, dyt, osatex, &texres);
+	rgb= multitex(mtex->tex, texvec, dxt, dyt, osatex, &texres, 0, mtex->which_output);
 
 	/* texture output */
 	if(rgb && (mtex->texflag & MTEX_RGBTOINT)) {
@@ -2126,7 +2167,7 @@ void do_halo_tex(HaloRen *har, float xn, float yn, float *colf)
 /* ------------------------------------------------------------------------- */
 
 /* hor and zen are RGB vectors, blend is 1 float, should all be initialized */
-void do_sky_tex(float *rco, float *lo, float *dxyview, float *hor, float *zen, float *blend, int skyflag)
+void do_sky_tex(float *rco, float *lo, float *dxyview, float *hor, float *zen, float *blend, int skyflag, short thread)
 {
 	MTex *mtex;
 	TexResult texres= {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0, NULL};
@@ -2226,7 +2267,7 @@ void do_sky_tex(float *rco, float *lo, float *dxyview, float *hor, float *zen, f
 			/* texture */
 			if(mtex->tex->type==TEX_IMAGE) do_2d_mapping(mtex, texvec, NULL, NULL, dxt, dyt);
 		
-			rgb= multitex(mtex->tex, texvec, dxt, dyt, R.osa, &texres);
+			rgb= multitex(mtex->tex, texvec, dxt, dyt, R.osa, &texres, thread, mtex->which_output);
 			
 			/* texture output */
 			if(rgb && (mtex->texflag & MTEX_RGBTOINT)) {
@@ -2407,7 +2448,7 @@ void do_lamp_tex(LampRen *la, float *lavec, ShadeInput *shi, float *colf, int ef
 				do_2d_mapping(mtex, texvec, NULL, NULL, dxt, dyt);
 			}
 			
-			rgb= multitex(tex, texvec, dxt, dyt, shi->osatex, &texres);
+			rgb= multitex(tex, texvec, dxt, dyt, shi->osatex, &texres, shi->thread, mtex->which_output);
 
 			/* texture output */
 			if(rgb && (mtex->texflag & MTEX_RGBTOINT)) {
@@ -2492,7 +2533,7 @@ int externtex(MTex *mtex, float *vec, float *tin, float *tr, float *tg, float *t
 		do_2d_mapping(mtex, texvec, NULL, NULL, dxt, dyt);
 	}
 	
-	rgb= multitex(tex, texvec, dxt, dyt, 0, &texr);
+	rgb= multitex(tex, texvec, dxt, dyt, 0, &texr, 0, mtex->which_output);
 	
 	if(rgb) {
 		texr.tin= (0.35*texr.tr+0.45*texr.tg+0.2*texr.tb);