113 lines
2.8 KiB
Plaintext
113 lines
2.8 KiB
Plaintext
Shader "RapidIcon/PostProcessing/Underlay"
|
|
{
|
|
Properties
|
|
{
|
|
[NoScaleOffset]
|
|
_MainTex("Tex", 2D) = "black" {}
|
|
[NoScaleOffset]
|
|
_UnderlayTex("Underlay Image", 2D) = "black" {}
|
|
|
|
[Toggle]
|
|
_MatchAspect("Match Image Aspect Ratio", Int) = 1
|
|
_Scale("Scale", Float) = 1
|
|
_OffsetX("X Offset", Float) = 0
|
|
_OffsetY("Y Offset", Float) = 0
|
|
}
|
|
SubShader
|
|
{
|
|
Blend One OneMinusSrcAlpha
|
|
|
|
Pass
|
|
{
|
|
CGPROGRAM
|
|
#pragma vertex vert
|
|
#pragma fragment frag
|
|
|
|
#include "UnityCG.cginc"
|
|
|
|
struct appdata
|
|
{
|
|
float4 vertex : POSITION;
|
|
float2 uvMain : TEXCOORD0;
|
|
float2 uvUnderlay : TEXCOORD1;
|
|
};
|
|
|
|
struct v2f
|
|
{
|
|
float2 uvMain : TEXCOORD0;
|
|
float2 uvUnderlay : TEXCOORD1;
|
|
float4 vertex : SV_POSITION;
|
|
};
|
|
|
|
float4 _MainTex_TexelSize;
|
|
float4 _UnderlayTex_TexelSize;
|
|
int _MatchAspect;
|
|
float _Scale;
|
|
float _OffsetX;
|
|
float _OffsetY;
|
|
|
|
v2f vert(appdata v)
|
|
{
|
|
v2f o;
|
|
o.vertex = UnityObjectToClipPos(v.vertex);
|
|
o.uvMain = v.uvMain;
|
|
o.uvUnderlay = v.uvUnderlay;
|
|
|
|
o.uvUnderlay.x -= _OffsetX;
|
|
o.uvUnderlay.y -= _OffsetY;
|
|
|
|
o.uvUnderlay = (o.uvUnderlay - 0.5) / _Scale + 0.5;
|
|
|
|
if (_UnderlayTex_TexelSize.z > _UnderlayTex_TexelSize.w)
|
|
{
|
|
float aspectScale = _UnderlayTex_TexelSize.x / _UnderlayTex_TexelSize.y;
|
|
o.uvUnderlay.y = (o.uvUnderlay.y - 0.5) / aspectScale + 0.5;
|
|
}
|
|
else
|
|
{
|
|
float aspectScale = _UnderlayTex_TexelSize.y / _UnderlayTex_TexelSize.x;
|
|
o.uvUnderlay.x = (o.uvUnderlay.x - 0.5) / aspectScale + 0.5;
|
|
}
|
|
|
|
if (!_MatchAspect) {
|
|
if (_MainTex_TexelSize.z > _MainTex_TexelSize.w)
|
|
{
|
|
float aspectScale = _MainTex_TexelSize.y / _MainTex_TexelSize.x;
|
|
o.uvUnderlay.y = (o.uvUnderlay.y - 0.5) / aspectScale + 0.5;
|
|
}
|
|
else
|
|
{
|
|
float aspectScale = _MainTex_TexelSize.x / _MainTex_TexelSize.y;
|
|
o.uvUnderlay.x = (o.uvUnderlay.x - 0.5) / aspectScale + 0.5;
|
|
}
|
|
}
|
|
|
|
return o;
|
|
}
|
|
|
|
sampler2D _MainTex;
|
|
sampler2D _UnderlayTex;
|
|
|
|
fixed4 frag(v2f i) : SV_Target
|
|
{
|
|
fixed4 main = tex2D(_MainTex, i.uvMain);
|
|
fixed4 underlay = tex2D(_UnderlayTex, i.uvUnderlay);
|
|
|
|
fixed4 output;
|
|
if (i.uvUnderlay.x < 0 || i.uvUnderlay.x > 1 || i.uvUnderlay.y < 0 || i.uvUnderlay.y > 1)
|
|
output = main;
|
|
else
|
|
{
|
|
if (underlay.a > 0)
|
|
output.rgb = lerp(underlay.rgb, main.rgb, main.a);
|
|
else
|
|
output.rgb = main;
|
|
output.a = 1 - ((1 - main.a)*(1 - underlay.a));
|
|
}
|
|
return output;
|
|
}
|
|
ENDCG
|
|
}
|
|
}
|
|
}
|