Merge pull request #262 from frenzibyte/fix-metal-flashlight

Fix flashlight mod not working on Metal

osu.Game.Resources/Shaders/sh_Flashlight.h

@@ -15,5 +15,8 @@ lowp vec4 getColourAt(highp vec2, highp vec2, lowp vec4);
 
 void main(void)
 {
-    o_Colour = mix(getColourAt(flashlightPos - v_Position, flashlightSize, v_Colour), vec4(0.0, 0.0, 0.0, 1.0), flashlightDim);
+    // todo: workaround for a SPIR-V bug (https://github.com/ppy/osu-framework/issues/5719)
-}
+    float one = g_WrapModeS >= 0 ? 1 : 0;
+
+    o_Colour = mix(getColourAt(flashlightPos - v_Position, flashlightSize, v_Colour), vec4(0.0, 0.0, 0.0, 1.0), flashlightDim) * one;
+}