// Upgrade NOTE: replaced '_Object2World' with 'unity_ObjectToWorld'
// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
Shader "FairyGUI/Image"
{
Properties
{
_MainTex ("Base (RGB), Alpha (A)", 2D) = "black" {}
_StencilComp ("Stencil Comparison", Float) = 8
_Stencil ("Stencil ID", Float) = 0
_StencilOp ("Stencil Operation", Float) = 0
_StencilWriteMask ("Stencil Write Mask", Float) = 255
_StencilReadMask ("Stencil Read Mask", Float) = 255
_Saturation("Saturation", Float) = 1 //调整饱和度
_Brightness("Brightness", Float) = 1 //调整亮度
_Contrast("Contrast", Float) = 1 //调整对比度
_ColorMask ("Color Mask", Float) = 15
_BlendSrcFactor ("Blend SrcFactor", Float) = 5
_BlendDstFactor ("Blend DstFactor", Float) = 10
}
SubShader
{
LOD 100
Tags
{
"Queue" = "Transparent"
"IgnoreProjector" = "True"
"RenderType" = "Transparent"
}
Stencil
{
Ref [_Stencil]
Comp [_StencilComp]
Pass [_StencilOp]
ReadMask [_StencilReadMask]
WriteMask [_StencilWriteMask]
}
Cull Off
Lighting Off
ZWrite Off
Fog { Mode Off }
Blend [_BlendSrcFactor] [_BlendDstFactor], One One
ColorMask [_ColorMask]
Pass
{
CGPROGRAM
#pragma multi_compile NOT_COMBINED COMBINED
#pragma multi_compile NOT_GRAYED GRAYED COLOR_FILTER
#pragma multi_compile NOT_CLIPPED CLIPPED SOFT_CLIPPED ALPHA_MASK
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
struct appdata_t
{
float4 vertex : POSITION;
fixed4 color : COLOR;
float4 texcoord : TEXCOORD0;
};
struct v2f
{
float4 vertex : SV_POSITION;
fixed4 color : COLOR;
float4 texcoord : TEXCOORD0;
#ifdef CLIPPED
float2 clipPos : TEXCOORD1;
#endif
#ifdef SOFT_CLIPPED
float2 clipPos : TEXCOORD1;
#endif
};
sampler2D _MainTex;
#ifdef COMBINED
sampler2D _AlphaTex;
#endif
#ifdef CLIPPED
float4 _ClipBox = float4(-2, -2, 0, 0);
#endif
#ifdef SOFT_CLIPPED
float4 _ClipBox = float4(-2, -2, 0, 0);
float4 _ClipSoftness = float4(0, 0, 0, 0);
#endif
#ifdef COLOR_FILTER
float4x4 _ColorMatrix;
float4 _ColorOffset;
float _ColorOption = 0;
#endif
half _Saturation;
half _Brightness;
half _Contrast;
v2f vert (appdata_t v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.texcoord = v.texcoord;
#if !defined(UNITY_COLORSPACE_GAMMA) && (UNITY_VERSION >= 550)
o.color.rgb = GammaToLinearSpace(v.color.rgb);
o.color.a = v.color.a;
#else
o.color = v.color;
#endif
#ifdef CLIPPED
o.clipPos = mul(unity_ObjectToWorld, v.vertex).xy * _ClipBox.zw + _ClipBox.xy;
#endif
#ifdef SOFT_CLIPPED
o.clipPos = mul(unity_ObjectToWorld, v.vertex).xy * _ClipBox.zw + _ClipBox.xy;
#endif
return o;
}
fixed4 frag (v2f i) : SV_Target
{
fixed4 col = tex2D(_MainTex, i.texcoord.xy / i.texcoord.w) * i.color;
#ifdef COMBINED
col.a *= tex2D(_AlphaTex, i.texcoord.xy / i.texcoord.w).g;
#endif
#ifdef GRAYED
fixed grey = dot(col.rgb, fixed3(0.299, 0.587, 0.114));
col.rgb = fixed3(grey, grey, grey);
#endif
#ifdef SOFT_CLIPPED
float2 factor = float2(0,0);
if(i.clipPos.x<0)
factor.x = (1.0-abs(i.clipPos.x)) * _ClipSoftness.x;
else
factor.x = (1.0-i.clipPos.x) * _ClipSoftness.z;
if(i.clipPos.y<0)
factor.y = (1.0-abs(i.clipPos.y)) * _ClipSoftness.w;
else
factor.y = (1.0-i.clipPos.y) * _ClipSoftness.y;
col.a *= clamp(min(factor.x, factor.y), 0.0, 1.0);
#endif
#ifdef CLIPPED
float2 factor = abs(i.clipPos);
col.a *= step(max(factor.x, factor.y), 1);
#endif
#ifdef COLOR_FILTER
if (_ColorOption == 0)
{
fixed4 col2 = col;
col2.r = dot(col, _ColorMatrix[0]) + _ColorOffset.x;
col2.g = dot(col, _ColorMatrix[1]) + _ColorOffset.y;
col2.b = dot(col, _ColorMatrix[2]) + _ColorOffset.z;
col2.a = dot(col, _ColorMatrix[3]) + _ColorOffset.w;
col = col2;
}
else //premultiply alpha
col.rgb *= col.a;
#endif
#ifdef ALPHA_MASK
clip(col.a - 0.001);
#endif
//brigtness亮度直接乘以一个系数，也就是RGB整体缩放，调整亮度
fixed3 finalColor = col * _Brightness;
//saturation饱和度：首先根据公式计算同等亮度情况下饱和度最低的值：
fixed gray = 0.2125 * col.r + 0.7154 * col.g + 0.0721 * col.b;
fixed3 grayColor = fixed3(gray, gray, gray);
finalColor = lerp(grayColor, finalColor, _Saturation);
//contrast对比度：首先计算对比度最低的值
fixed3 avgColor = fixed3(0.5, 0.5, 0.5);
//根据Contrast在对比度最低的图像和原图之间差值
finalColor = lerp(avgColor, finalColor, _Contrast);
return fixed4(finalColor, col.a);
}
ENDCG
}
}
}
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