update UTI, remove blur from CompDraw mask

data/shaders/comp-draw.glsl

@@ -78,7 +78,11 @@ void main()
         stroke.a = clamp(blend_stroke(stroke.a, dual.a, dual_alpha, dual_blend_mode), 0.0, 1.0);
     }
 
-    stroke.a = mask ? stroke.a * blur(tex_mask, uv).r : stroke.a;
+    // Don't use blur to sample the mask
+    // it breaks blend_mode value MacBook with Intel HD Graphics 6000
+    if (mask)
+        stroke.a = stroke.a * texture(tex_mask, uv).r;
+    
     if (!lock && base.a == 0.0)
     {
         frag = stroke * vec4(1.0, 1.0, 1.0, alpha);