44 lines
895 B
HLSL
44 lines
895 B
HLSL
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#if !defined(SPRITE_MASK_SHARED)
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#define SPRITE_MASK_SHARED
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// alpha below which a mask should discard a pixel, thereby preventing the stencil buffer from being marked with the Mask's presence
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half _Cutoff;
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TEXTURE2D(_MainTex);
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SAMPLER(sampler_MainTex);
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struct Attributes
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{
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float4 positionOS : POSITION;
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half2 texcoord : TEXCOORD0;
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};
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struct Varyings
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{
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float4 positionCS : SV_POSITION;
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half2 uv : TEXCOORD0;
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};
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Varyings MaskRenderingVertex(Attributes input)
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{
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Varyings output;
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output.positionCS = TransformObjectToHClip(input.positionOS.xyz);
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output.uv = input.texcoord;
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return output;
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}
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half4 MaskRenderingFragment(Varyings input) : SV_Target
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{
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half4 c = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, input.uv);
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// for masks: discard pixel if alpha falls below MaskingCutoff
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clip(c.a - _Cutoff);
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return half4(1, 1, 1, 0.2);
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}
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#endif
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