X-Git-Url: https://gitweb.ps.run/subsurface_scattering/blobdiff_plain/9d10826ccb5d1f8a3821d4d2f4242c401146d12d..a0fdc6d882a1755d0b0607ba3d9bb55e7f8ac006:/shaders/fbo_frag.glsl?ds=sidebyside

diff --git a/shaders/fbo_frag.glsl b/shaders/fbo_frag.glsl
index cf1fafa..1102992 100644
--- a/shaders/fbo_frag.glsl
+++ b/shaders/fbo_frag.glsl
@@ -3,11 +3,62 @@ out vec4 FragColor;
   
 in vec2 TexCoords;
 
-uniform sampler2D screenTexture;
+uniform sampler2D shadowmapTexture;
+uniform sampler2D irradianceTexture;
+uniform int screenWidth;
+uniform int screenHeight;
+uniform int renderState;
+uniform vec2 samplePositions[13];
+uniform vec3 sampleWeights[13];
+
+vec4 blur(sampler2D tex, vec2 uv, vec2 res) {
+  float Pi = 6.28318530718; // Pi*2
+    
+  // GAUSSIAN BLUR SETTINGS {{{
+  float Directions = 16.0; // BLUR DIRECTIONS (Default 16.0 - More is better but slower)
+  float Quality = 4.0; // BLUR QUALITY (Default 4.0 - More is better but slower)
+  float Size = 8.0; // BLUR SIZE (Radius)
+  // GAUSSIAN BLUR SETTINGS }}}
+  
+  vec2 Radius = Size/res;
+  
+  // Pixel colour
+  vec4 Color = texture(tex, uv);
+  
+  // Blur calculations
+  for( float d=0.0; d<Pi; d+=Pi/Directions) {
+    for(float i=1.0/Quality; i<=1.0; i+=1.0/Quality) {
+      Color += texture( tex, uv+vec2(cos(d),sin(d))*Radius*i);		
+    }
+  }
+  
+  // Output to screen
+  Color /= Quality * Directions - 15.0;
+  return Color;
+}
 
 void main()
-{ 
-    FragColor = vec4(
-        texture(screenTexture, TexCoords).rgb,
-        1.0);
+{
+    if (renderState == 0) {
+        FragColor = blur(shadowmapTexture, TexCoords, vec2(screenWidth, screenHeight));
+    }
+    else if (renderState == 1) {
+        FragColor = texture(shadowmapTexture, TexCoords);
+    }
+    // stencil buffer
+    else if (renderState == 2) {
+        FragColor = texture(irradianceTexture, TexCoords);
+    }
+    else if (renderState == 3) {
+        vec4 result = vec4(0, 0, 0, 1);
+        for (int i = 0; i < 13; i++) {
+            vec2 sampleCoords = TexCoords + samplePositions[i] * vec2(1.0/screenWidth, 1.0/screenHeight);
+            //vec4 sample = texture(irradianceTexture, sampleCoords)
+            //            * texture(shadowmapTexture, sampleCoords);
+            vec4 sample = texture(irradianceTexture, sampleCoords);
+            vec4 weight = vec4(sampleWeights[i], 1);
+            result += sample * weight;
+        }
+        FragColor = result;
+    }
 }