fix shaders format

data/shaders/include/blend.glsl

@@ -1,20 +1,76 @@
 mediump vec3 blend_normal(mediump vec4 base, mediump vec4 stroke, mediump float alpha_tot)
-{ return mix(base.rgb, stroke.rgb, stroke.a/alpha_tot); }
-mediump vec3 blend_multiply(mediump vec4 base, mediump vec4 stroke, mediump float alpha_tot)
-{ return mix(stroke.rgb, mix(base.rgb, base.rgb*stroke.rgb, stroke.a/alpha_tot), base.a/alpha_tot); }
-mediump vec3 blend_screen(mediump vec4 base, mediump vec4 stroke, mediump float alpha_tot)
-{ return mix(stroke.rgb, mix(base.rgb, 1.0-(1.0-base.rgb)*(1.0-stroke.rgb), stroke.a/alpha_tot), base.a/alpha_tot); }
-mediump vec3 blend_colorDodge(mediump vec4 base, mediump vec4 stroke, mediump float alpha_tot)
-{ return mix(stroke.rgb, mix(base.rgb, base.rgb/(1.0-stroke.rgb), stroke.a/alpha_tot), base.a/alpha_tot); }
-mediump vec3 blend_overlay(mediump vec4 base, mediump vec4 stroke, mediump float alpha_tot)
-{ return mix(stroke.rgb, mix(base.rgb, mix(2.0*base.rgb*stroke.rgb, 1.0-2.0*(1.0-base.rgb)*(1.0-stroke.rgb), floor(base.rgb*2.0)), stroke.a/alpha_tot), base.a/alpha_tot); }
-mediump vec4 blend(mediump vec4 base, mediump vec4 stroke, int mode) {
-   mediump float contribution = (1.0 - base.a) * stroke.a;
-   mediump float alpha_tot = base.a + contribution;
-   if      (mode == 0) return vec4(blend_normal(base, stroke, alpha_tot), alpha_tot);
-   else if (mode == 1) return vec4(blend_multiply(base, stroke, alpha_tot), alpha_tot);
-   else if (mode == 2) return vec4(blend_screen(base, stroke, alpha_tot), alpha_tot);
-   else if (mode == 3) return vec4(blend_colorDodge(base, stroke, alpha_tot), alpha_tot);
-   else if (mode == 4) return vec4(blend_overlay(base, stroke, alpha_tot), alpha_tot);
-   else return vec4(1.0, 0.0, 0.0, 1.0);
+{
+    return mix(
+        base.rgb,
+        stroke.rgb,
+        stroke.a/alpha_tot
+    );
+}
+
+mediump vec3 blend_multiply(mediump vec4 base, mediump vec4 stroke, mediump float alpha_tot)
+{
+    return mix(
+        stroke.rgb, 
+        mix(
+            base.rgb, 
+            base.rgb*stroke.rgb, 
+            stroke.a/alpha_tot
+        ), 
+        base.a/alpha_tot
+    );
+}
+
+mediump vec3 blend_screen(mediump vec4 base, mediump vec4 stroke, mediump float alpha_tot)
+{
+    return mix(
+        stroke.rgb, 
+        mix(
+            base.rgb, 
+            1.0-(1.0-base.rgb)*(1.0-stroke.rgb), 
+            stroke.a/alpha_tot
+        ), 
+        base.a/alpha_tot
+    );
+}
+
+mediump vec3 blend_colorDodge(mediump vec4 base, mediump vec4 stroke, mediump float alpha_tot)
+{
+    return mix(
+        stroke.rgb, 
+        mix(
+            base.rgb, 
+            base.rgb/(1.0-stroke.rgb), 
+            stroke.a/alpha_tot
+        ), 
+        base.a/alpha_tot
+    );
+}
+
+mediump vec3 blend_overlay(mediump vec4 base, mediump vec4 stroke, mediump float alpha_tot)
+{
+    return mix(
+        stroke.rgb, 
+        mix(
+            base.rgb, 
+            mix(
+                2.0*base.rgb*stroke.rgb, 
+                1.0-2.0*(1.0-base.rgb)*(1.0-stroke.rgb), 
+                floor(base.rgb*2.0)
+            ), 
+            stroke.a/alpha_tot
+        ), 
+        base.a/alpha_tot
+    );
+}
+
+mediump vec4 blend(mediump vec4 base, mediump vec4 stroke, int mode)
+{
+    mediump float contribution = (1.0 - base.a) * stroke.a;
+    mediump float alpha_tot = base.a + contribution;
+    if      (mode == 0) return vec4(blend_normal(base, stroke, alpha_tot), alpha_tot);
+    else if (mode == 1) return vec4(blend_multiply(base, stroke, alpha_tot), alpha_tot);
+    else if (mode == 2) return vec4(blend_screen(base, stroke, alpha_tot), alpha_tot);
+    else if (mode == 3) return vec4(blend_colorDodge(base, stroke, alpha_tot), alpha_tot);
+    else if (mode == 4) return vec4(blend_overlay(base, stroke, alpha_tot), alpha_tot);
+    else return vec4(1.0, 0.0, 0.0, 1.0);
 }