diff --git a/Resources/Textures/Shaders/cooldown.swsl b/Resources/Textures/Shaders/cooldown.swsl
index 9622b26968..990453ccd8 100644
--- a/Resources/Textures/Shaders/cooldown.swsl
+++ b/Resources/Textures/Shaders/cooldown.swsl
@@ -12,14 +12,18 @@ void fragment() {
     highp float angle = atan(delta.x, -delta.y) + PI;
 
     highp float dist = length(delta);
+#ifdef HAS_DFDX
     highp float dist_fwidth = fwidth(dist) * 0.67;
+#else
+    highp float dist_fwidth = 0.05;
+#endif
     
     highp float dist_alpha = smoothstep(0.1-dist_fwidth, 0.1, abs(dist-0.35));
     
     highp float angle_delta = (progress * PI * 2.0) - angle;
     highp float arc_length = angle_delta * dist;
     
-    highp float angle_alpha = progress > 0 ? smoothstep(dist_fwidth, 0.0, arc_length) : 0.0;
+    highp float angle_alpha = (progress > 0.0) ? smoothstep(dist_fwidth, 0.0, arc_length) : 0.0;
 
-    COLOR = vec4(col.xyz, 1-max(dist_alpha, angle_alpha));
+    COLOR = vec4(col.xyz, 1.0 - max(dist_alpha, angle_alpha));
 }
diff --git a/Resources/Textures/Shaders/flashed_effect.swsl b/Resources/Textures/Shaders/flashed_effect.swsl
index ca57300aba..0b15474b15 100644
--- a/Resources/Textures/Shaders/flashed_effect.swsl
+++ b/Resources/Textures/Shaders/flashed_effect.swsl
@@ -1,5 +1,5 @@
 uniform highp float percentComplete;
-uniform highp float fadeFalloffExp = 8.0;
+const highp float fadeFalloffExp = 8.0;
 
 void fragment() {
     // Higher exponent -> stronger blinding effect
diff --git a/Resources/Textures/Shaders/gradient_circle_mask.swsl b/Resources/Textures/Shaders/gradient_circle_mask.swsl
index 7772fec725..800e19ef84 100644
--- a/Resources/Textures/Shaders/gradient_circle_mask.swsl
+++ b/Resources/Textures/Shaders/gradient_circle_mask.swsl
@@ -1,5 +1,5 @@
-uniform highp float percentagedistanceshow = 0.05;
-uniform highp float gradientfalloffwidth = 3.0;
+const highp float percentagedistanceshow = 0.05;
+const highp float gradientfalloffwidth = 3.0;
 
 highp vec4 circle(in highp vec2 uv, in highp vec2 pos, highp float rad, in highp vec3 color) {
     highp float d = length(pos - uv) - rad;
diff --git a/Resources/Textures/Shaders/outline.swsl b/Resources/Textures/Shaders/outline.swsl
index 514669da88..945ac4bdb6 100644
--- a/Resources/Textures/Shaders/outline.swsl
+++ b/Resources/Textures/Shaders/outline.swsl
@@ -29,10 +29,10 @@
 
 light_mode unshaded;
 //shader_type canvas_item;
-uniform highp float outline_width = 2.0;
+uniform highp float outline_width; // = 2.0;
 // TODO: implement that hint_color thingy.
 //uniform vec4 outline_color: hint_color;
-uniform highp vec4 outline_color=vec4(1.0,0.0,0.0,0.33);
+uniform highp vec4 outline_color; // =vec4(1.0,0.0,0.0,0.33);
 
 void fragment() {
 	highp vec4 col = texture2D(TEXTURE, UV);