0.8.22:Shader Update

shader/warning.glsl

@@ -0,0 +1,8 @@
+extern float w,h;
+extern float level;
+vec4 effect(vec4 color,Image text,vec2 pos,vec2 scr_pos){
+	float dx=abs(scr_pos.x/w-0.5);
+	float dy=abs(scr_pos.y/h-0.5);
+	float a=(max(dx,dy)*2.-.626)*level;
+	return vec4(1.,0.,0.,a);
+}