shaders: Make blur shaders make sense

Signed-off-by: Alexander Shishkin <[email protected]>
virtuoso · Oct 13, 2024 · b601da0 · b601da0
1 parent 7b00b58
commit b601da0
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Showing 4 changed files with 30 additions and 32 deletions.
diff --git a/shaders/hblur.frag b/shaders/hblur.frag
@@ -10,15 +10,15 @@ void main()
 {
 
     FragColor = vec4(0.0);
-    FragColor += texture(model_tex, blur_coords[0]) * 0.0093;
-    FragColor += texture(model_tex, blur_coords[1]) * 0.028002;
-    FragColor += texture(model_tex, blur_coords[2]) * 0.065984;
-    FragColor += texture(model_tex, blur_coords[3]) * 0.121703;
-    FragColor += texture(model_tex, blur_coords[4]) * 0.175713;
-    FragColor += texture(model_tex, blur_coords[5]) * 0.198596;
-    FragColor += texture(model_tex, blur_coords[6]) * 0.175713;
-    FragColor += texture(model_tex, blur_coords[7]) * 0.121703;
-    FragColor += texture(model_tex, blur_coords[8]) * 0.065984;
-    FragColor += texture(model_tex, blur_coords[9]) * 0.028002;
-    FragColor += texture(model_tex, blur_coords[10]) * 0.0093;
-}
+    FragColor += texture(model_tex, pass_tex + blur_coords[0]) * 0.0093;
+    FragColor += texture(model_tex, pass_tex + blur_coords[1]) * 0.028002;
+    FragColor += texture(model_tex, pass_tex + blur_coords[2]) * 0.065984;
+    FragColor += texture(model_tex, pass_tex + blur_coords[3]) * 0.121703;
+    FragColor += texture(model_tex, pass_tex + blur_coords[4]) * 0.175713;
+    FragColor += texture(model_tex, pass_tex + blur_coords[5]) * 0.198596;
+    FragColor += texture(model_tex, pass_tex + blur_coords[6]) * 0.175713;
+    FragColor += texture(model_tex, pass_tex + blur_coords[7]) * 0.121703;
+    FragColor += texture(model_tex, pass_tex + blur_coords[8]) * 0.065984;
+    FragColor += texture(model_tex, pass_tex + blur_coords[9]) * 0.028002;
+    FragColor += texture(model_tex, pass_tex + blur_coords[10]) * 0.0093;
+}
diff --git a/shaders/hblur.vert b/shaders/hblur.vert
@@ -11,10 +11,9 @@ out vec2 blur_coords[11];
 
 void main()
 {
-    gl_Position = /*trans * */vec4(position, 1.0);
+    gl_Position = trans * vec4(position, 1.0);
     pass_tex = tex;
-    vec2 center_coords = position.xy * 0.5 + 0.5;
     float pixsz = 1.0 / width;
     for (int i = -5; i <= 5; i++)
-        blur_coords[i + 5] = center_coords + vec2(pixsz * float(i), 0.0);
-}
+        blur_coords[i + 5] = vec2(pixsz * float(i), 0.0);
+}
diff --git a/shaders/vblur.frag b/shaders/vblur.frag
@@ -10,15 +10,15 @@ void main()
 {
 
     FragColor = vec4(0.0);
-    FragColor += texture(model_tex, blur_coords[0]) * 0.0093;
-    FragColor += texture(model_tex, blur_coords[1]) * 0.028002;
-    FragColor += texture(model_tex, blur_coords[2]) * 0.065984;
-    FragColor += texture(model_tex, blur_coords[3]) * 0.121703;
-    FragColor += texture(model_tex, blur_coords[4]) * 0.175713;
-    FragColor += texture(model_tex, blur_coords[5]) * 0.198596;
-    FragColor += texture(model_tex, blur_coords[6]) * 0.175713;
-    FragColor += texture(model_tex, blur_coords[7]) * 0.121703;
-    FragColor += texture(model_tex, blur_coords[8]) * 0.065984;
-    FragColor += texture(model_tex, blur_coords[9]) * 0.028002;
-    FragColor += texture(model_tex, blur_coords[10]) * 0.0093;
-}
+    FragColor += texture(model_tex, pass_tex + blur_coords[0]) * 0.0093;
+    FragColor += texture(model_tex, pass_tex + blur_coords[1]) * 0.028002;
+    FragColor += texture(model_tex, pass_tex + blur_coords[2]) * 0.065984;
+    FragColor += texture(model_tex, pass_tex + blur_coords[3]) * 0.121703;
+    FragColor += texture(model_tex, pass_tex + blur_coords[4]) * 0.175713;
+    FragColor += texture(model_tex, pass_tex + blur_coords[5]) * 0.198596;
+    FragColor += texture(model_tex, pass_tex + blur_coords[6]) * 0.175713;
+    FragColor += texture(model_tex, pass_tex + blur_coords[7]) * 0.121703;
+    FragColor += texture(model_tex, pass_tex + blur_coords[8]) * 0.065984;
+    FragColor += texture(model_tex, pass_tex + blur_coords[9]) * 0.028002;
+    FragColor += texture(model_tex, pass_tex + blur_coords[10]) * 0.0093;
+}
diff --git a/shaders/vblur.vert b/shaders/vblur.vert
@@ -11,10 +11,9 @@ out vec2 blur_coords[11];
 
 void main()
 {
-    gl_Position = /*trans * */vec4(position, 1.0);
+    gl_Position = vec4(position, 1.0);
     pass_tex = tex;
-    vec2 center_coords = position.xy * 0.5 + 0.5;
     float pixsz = 1.0 / height;
     for (int i = -5; i <= 5; i++)
-        blur_coords[i + 5] = center_coords + vec2(0.0, pixsz * float(i));
-}
+        blur_coords[i + 5] = vec2(0.0, pixsz * float(i));
+}