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94 行
2.1 KiB
94 行
2.1 KiB
Shader "Instanced/GlyphShaderProc" {
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Properties{
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_MainTex("Albedo (RGB)", 2D) = "white" {}
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}
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SubShader{
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Pass{
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Tags{ "Queue" = "Transparent" "RenderType" = "Transparent" }
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ZWrite off
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ZTest Always
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Cull off
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//Blend One One
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Blend SrcAlpha OneMinusSrcAlpha
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#pragma multi_compile_fwdbase nolightmap nodirlightmap nodynlightmap novertexlight
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#pragma target 4.5
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#include "UnityCG.cginc"
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sampler2D _MainTex;
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float4 scales; // glyph scale in world (x,y) and on texture (z,w)
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struct instanceData
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{
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float4 position;
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float4 size;
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float4 color;
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};
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StructuredBuffer<instanceData> positionBuffer;
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struct v2f
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{
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float4 pos : SV_POSITION;
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float2 uv_MainTex : TEXCOORD0;
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float4 color : TEXCOORD3;
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};
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v2f vert(uint vid : SV_VertexID, uint instanceID : SV_InstanceID)
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{
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// We just draw a bunch of vertices but want to pretend to
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// be drawing two-triangle quads. Build inst/vert id for this:
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int instID = vid / 6.0;
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int vertID = vid - instID * 6;
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// Generates (0,0) (1,0) (1,1) (1,1) (1,0) (0,0) from vertID
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float4 v_pos = saturate(float4(2 - abs(vertID - 2), 2 - abs(vertID - 3), 0, 0));
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// Read instance data
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float4 pos_uv = positionBuffer[instID].position;
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float2 scale = positionBuffer[instID].size.xy;
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float4 color = positionBuffer[instID].color;
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// Generate uv
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float2 uv = (pos_uv.zw + v_pos.xy) * scales.zw;
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uv.y = 1.0 - uv.y;
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// Generate position
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float2 p = (v_pos*scale + pos_uv.xy) * scales.xy;
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p = float2(-1, -1) + p * 2.0;
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// Need to flip y for HD pipe for some reason
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p.y *= -1;
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v2f o;
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o.pos = float4(p.xy, 1, 1);
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o.uv_MainTex = uv;
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o.color = color;
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return o;
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}
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fixed4 frag(v2f i) : SV_Target
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{
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float4 albedo = float4(1,1,1,1);
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// TODO fix up this hack
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if (length(i.uv_MainTex) > 0)
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{
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albedo = tex2D(_MainTex, i.uv_MainTex);
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albedo = lerp(albedo, float4(1, 1, 1, 1), i.color.a);
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}
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fixed4 output = albedo * float4(i.color.rgb, 1);
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return output;
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}
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ENDCG
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}
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}
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}
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