add motion vectors to all shaders

[carveJwlIkooP6JGAAIwe30JlM.git] / shaders / blitblur.fs

diff --git a/shaders/blitblur.fs b/shaders/blitblur.fs
index eac828e5e03b700127611dac7160d1235cbd5f00..860602281395bd57df0aacc669df7d6d28d0e518 100644 (file)
--- a/shaders/blitblur.fs
+++ b/shaders/blitblur.fs
@@ -1,5 +1,8 @@
 out vec4 FragColor;
 uniform sampler2D uTexMain;
+uniform sampler2D uTexMotion;
+uniform float uBlurStrength;
+uniform float uBlurExponent;
 
 in vec2 aUv;
 
@@ -12,10 +15,16 @@ vec2 rand_hash22( vec2 p )
 
 void main()
 {
-   vec2 voffset = rand_hash22( aUv );
+   vec2 vcenter = (aUv-vec2(0.5))*vec2(2.0);
+   vec2 vrand = rand_hash22( aUv ) * 2.0 - vec2(1.0);
+   vec2 vrand1 = rand_hash22( vrand ) * 2.0 - vec2(1.0);
    
-   float bamt = abs(aUv.x-0.5)*2.0;
-   bamt = pow(bamt,4.0)*0.05;
+   vec2 vdir = texture( uTexMotion, aUv ).xy * uBlurStrength;
 
-   FragColor = texture( uTexMain, aUv + voffset*bamt );
+   vec4 vcolour0 = texture( uTexMain, aUv + vdir*vrand.x );
+   vec4 vcolour1 = texture( uTexMain, aUv + vdir*vrand.y );
+   vec4 vcolour2 = texture( uTexMain, aUv + vdir*vrand1.x );
+   vec4 vcolour3 = texture( uTexMain, aUv + vdir*vrand1.y );
+
+   FragColor = ( vcolour0 + vcolour1 + vcolour2 + vcolour3 ) * 0.25;
 }