//Based on unity builtin shader
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//Currently this include only works for the default UI
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#ifndef MK_GLOW_UI
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#define MK_GLOW_UI
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#if defined(_EMISSION)
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#define EMISSION
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#elif defined(_EMISSION_ONLY)
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#define EMISSION_ONLY
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#endif
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struct appdata_t
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{
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float4 vertex : POSITION;
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float4 color : COLOR;
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float2 texcoord : TEXCOORD0;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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struct v2f
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{
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float4 vertex : SV_POSITION;
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fixed4 color : COLOR;
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float2 texcoord : TEXCOORD0;
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float4 worldPosition : TEXCOORD1;
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UNITY_VERTEX_OUTPUT_STEREO
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};
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sampler2D _MainTex;
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fixed4 _Color;
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fixed4 _TextureSampleAdd;
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float4 _ClipRect;
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float4 _MainTex_ST;
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#if defined(EMISSION) || defined(EMISSION_ONLY)
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uniform fixed3 _EmissionColor;
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uniform sampler2D _EmissionMap;
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#endif
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v2f vert(appdata_t v)
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{
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v2f OUT;
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UNITY_SETUP_INSTANCE_ID(v);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(OUT);
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OUT.worldPosition = v.vertex;
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OUT.vertex = UnityObjectToClipPos(OUT.worldPosition);
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OUT.texcoord = TRANSFORM_TEX(v.texcoord, _MainTex);
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OUT.color = v.color * _Color;
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return OUT;
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}
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fixed4 frag(v2f IN) : SV_Target
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{
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half4 color = (tex2D(_MainTex, IN.texcoord) + _TextureSampleAdd) * IN.color;
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#ifdef UNITY_UI_CLIP_RECT
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color.a *= UnityGet2DClipping(IN.worldPosition.xy, _ClipRect);
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#endif
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#ifdef UNITY_UI_ALPHACLIP
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clip (color.a - 0.001);
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#endif
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#if defined(EMISSION)
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fixed4 g = tex2D(_EmissionMap, IN.texcoord);
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g.rgb *= _EmissionColor;
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color.rgb += g.rgb * g.a;
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#elif defined(EMISSION_ONLY)
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fixed4 g = tex2D(_EmissionMap, IN.texcoord);
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g.rgb *= _EmissionColor;
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color.rgb = g.rgb * g.a;
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#endif
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return color;
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}
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#endif
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