From 2747067f6188d0e4f845c6ceb5d39a33ab193b87 Mon Sep 17 00:00:00 2001
From: radius <andres.430@gmail.com>
Date: Sun, 3 Dec 2017 15:10:24 -0500
Subject: [PATCH] this probably fixes the shader on noveau and others

---
 .../gl_shaders/pipeline_snowflake.glsl.frag.h | 39 ++++++++++++-------
 1 file changed, 25 insertions(+), 14 deletions(-)

diff --git a/gfx/drivers/gl_shaders/pipeline_snowflake.glsl.frag.h b/gfx/drivers/gl_shaders/pipeline_snowflake.glsl.frag.h
index a5426710baf..1b048d2223f 100644
--- a/gfx/drivers/gl_shaders/pipeline_snowflake.glsl.frag.h
+++ b/gfx/drivers/gl_shaders/pipeline_snowflake.glsl.frag.h
@@ -6,29 +6,40 @@
 
 static const char* stock_fragment_xmb_snowflake = GLSL(
    uniform float time;
-   uniform float atime;
    uniform vec2 OutputSize;
    vec2 uv;
 
+   float atime;
+
    float rand(vec2 co)
    {
       return fract(sin(dot(co.xy, vec2(12.9898, 78.233))) * 43758.5453);
    }
 
-   float rand(float x){ return rand(vec2(x,1.0));}
+   float rand_float(float x)
+   { 
+      return rand(vec2(x, 1.0));
+   }
    
    float snow(vec3 pos, vec2 uv, float o)
    {
       vec2 d = (pos.xy - uv);
-      float a = atan(d.y,d.x)+sin(atime*1.+o)*10.;
+      float a = atan(d.y,d.x) + sin(atime*1.0 + o) * 10.0;
       
       float dist = d.x*d.x + d.y*d.y;
       
-      if(dist < pos.z/400.){
+      if(dist < pos.z/400.0)
+      {
          float col = 0.0;
-         if(sin(a*8.) < 0.0){col=1.0;}
-         if(dist<pos.z/800.0){col+=1.0;}
-         return col*pos.z;
+         if(sin(a * 8.0) < 0.0)
+         {
+            col=1.0;
+         }
+         if(dist < pos.z/800.0)
+         {
+            col+=1.0;
+         }
+         return col * pos.z;
       }
       
       return 0.0;
@@ -37,14 +48,14 @@ static const char* stock_fragment_xmb_snowflake = GLSL(
    float col(vec2 c)
    {
       float color = 0.0;
-      for (int i = 1; i < 50; i++)
+      for (int i = 1; i < 15; i++)
       {
-		   float o = rand(float(i) / 3.0) * 15 * 2.0;
-		   float z = rand(float(i) + 13.0);
-		   float x = 1.8 - (3.6) * (rand(floor((time*((z+1.0)/2.0)+o)/2.0)) + sin(time*o/1000.0)/10.0);
-		   float y = 1.0-mod((time*((z+1.0)/2.0))+o, 2.0);
+		   float o = rand_float(float(i) / 3.0) * 15.0;
+		   float z = rand_float(float(i) + 13.0);
+		   float x = 1.8 - (3.6) * (rand_float(floor((time*((z + 1.0) / 2.0) +o) / 2.0)) + sin(time * o /1000.0) / 10.0);
+		   float y = 1.0 - mod((time * ((z + 1.0)/2.0)) + o, 2.0);
 		
-		   color += snow(vec3(x,y,z),c,o);    
+		   color += snow(vec3(x,y,z), c, o);    
 	   }
 	
       return color;
@@ -57,7 +68,7 @@ static const char* stock_fragment_xmb_snowflake = GLSL(
       vec2 p = uv;
       p.x *= OutputSize.x / OutputSize.y;
       
-      atime = (time + 1)/4.0;
+      atime = (time + 1.0) / 4.0;
 	
       gl_FragColor = vec4(col(p));
    }