Start of msdf text

Sandbox/content/Shaders/msdfShader.hlsl

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+Texture2D<float3> Texture : register(t0);
+SamplerState Sampler : register(s0);
+
+cbuffer Constants
+{
+    float screenPixelRange = 2;
+}
+
+struct VS_Input
+{
+    float2 Position    : POSITION;
+    float4x4 Tranform  : TRANSFORM;
+    float4 Color       : COLOR;
+    float4 UVTransform : TEXCOORD;
+};
+
+struct PS_Input
+{
+    float4 Position : SV_Position;
+    float2 TexCoord : TEXCOORD0;
+    float4 Color : COLOR;
+};
+
+PS_Input VS(VS_Input input)
+{
+    PS_Input output;
+
+    output.Position = mul(float4(input.Position, 0.0f, 1.0f), input.Tranform);
+    output.TexCoord = input.UVTransform.xy + input.UVTransform.zw * input.Position;
+    output.Color = input.Color;
+
+    return output;
+}
+
+float median(float r, float g, float b) {
+    return max(min(r, g), min(max(r, g), b));
+}
+
+float4 PS(PS_Input input) : SV_Target0
+{
+    float3 msd = Texture.Sample(Sampler, input.TexCoord);
+    float sd = median(msd.r, msd.g, msd.b);
+    float screenPxDistance = screenPixelRange * (sd - 0.5);
+    float opacity = clamp(screenPxDistance + 0.5, 0.0, 1.0);
+    //color = mix(bgColor, fgColor, opacity);
+
+    //float4 color = lerp(float4(0, 0, 0, 0), input.Color, opacity);
+
+    //return color;
+
+    return float4(input.Color.rgb, opacity * input.Color.a);
+}
+
+#effect[VS=VS, PS=PS]