From 2de4c8f2b20efe57a27804bd20d7e4882e9137d4 Mon Sep 17 00:00:00 2001
From: Robin Allen <roblovski@gmail.com>
Date: Mon, 17 Aug 2009 22:17:25 +0000
Subject: Implemented multisampling for texture nodes.

---
 source/blender/nodes/intern/TEX_nodes/TEX_output.c | 46 +++++++++++++++++++++-
 1 file changed, 44 insertions(+), 2 deletions(-)

(limited to 'source/blender/nodes/intern/TEX_nodes')

diff --git a/source/blender/nodes/intern/TEX_nodes/TEX_output.c b/source/blender/nodes/intern/TEX_nodes/TEX_output.c
index 355de796c7e..96ee5d74f66 100644
--- a/source/blender/nodes/intern/TEX_nodes/TEX_output.c
+++ b/source/blender/nodes/intern/TEX_nodes/TEX_output.c
@@ -35,6 +35,48 @@ static bNodeSocketType inputs[]= {
 	{ -1, 0, ""	}
 };
 
+static void osa(
+	void (*input_fn)(float *, bNodeStack *, TexParams *, short),
+	float *out,
+	bNodeStack *in,
+	TexParams *p,
+	short thread
+){
+	if(!p->dxt) {
+		input_fn(out, in, p, thread);
+	} else {
+		float sample[4] = {0};
+		float coord[3];
+		TexParams sp = *p;
+		int i;
+	
+		sp.coord = coord;
+		sp.dxt = sp.dyt = 0;
+		
+		QUATCOPY(out, sample);
+		
+		for(i=0; i<5; i++) {
+			VECCOPY(coord, p->coord);
+			
+			if(i < 4)
+			{
+				if(i % 2) VECADD(coord, coord, p->dxt);
+				if(i > 1) VECADD(coord, coord, p->dyt);
+			}
+			else
+			{
+				VECADDFAC(coord, coord, p->dxt, 0.5);
+				VECADDFAC(coord, coord, p->dyt, 0.5);
+			}
+			
+			input_fn(sample, in, &sp, thread);
+			
+			QUATADDFAC(out, out, sample, 0.2);
+		}
+	}
+}
+	
+
 /* applies to render pipeline */
 static void exec(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
 {
@@ -52,14 +94,14 @@ static void exec(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
 			TexParams params;
 			params_from_cdata(&params, cdata);
 			
-			tex_input_rgba(&target->tr, in[0], &params, cdata->thread);
+			osa(tex_input_rgba, &target->tr, in[0], &params, cdata->thread);
 		
 			target->tin = (target->tr + target->tg + target->tb) / 3.0f;
 			target->talpha = 1.0f;
 		
 			if(target->nor) {
 				if(in[1]->hasinput)
-					tex_input_vec(target->nor, in[1], &params, cdata->thread);
+					osa(tex_input_vec, target->nor, in[1], &params, cdata->thread);
 				else
 					target->nor = 0;
 			}
-- 
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