engine/src/core-data/Common/ShaderLib/MultiSample.glsllib

#extension GL_ARB_texture_multisample : enable

uniform int m_NumSamples;
uniform int m_NumSamplesDepth;

#ifdef RESOLVE_MS
    #define COLORTEXTURE sampler2DMS
#else
    #define COLORTEXTURE sampler2D
#endif

#ifdef RESOLVE_DEPTH_MS
    #define DEPTHTEXTURE sampler2DMS
#else
    #define DEPTHTEXTURE sampler2D
#endif

// NOTE: Only define multisample functions if multisample is available and is being used!
#if defined(GL_ARB_texture_multisample) && (defined(RESOLVE_MS) || defined(RESOLVE_DEPTH_MS))
vec4 textureFetch(in sampler2DMS tex,in vec2 texC, in int numSamples){
      ivec2 iTexC = ivec2(texC * textureSize(tex));
      vec4 color = vec4(0.0);
      for (int i = 0; i < numSamples; i++){
         color += texelFetch(tex, iTexC, i);
      }
      return color / numSamples;
}

vec4 fetchTextureSample(in sampler2DMS tex,in vec2 texC,in int sample){
    ivec2 iTexC = ivec2(texC * textureSize(tex));
    return texelFetch(tex, iTexC, sample);
}

vec4 getColor(in sampler2DMS tex, in vec2 texC){
      return textureFetch(tex, texC, m_NumSamples);
}

vec4 getColorSingle(in sampler2DMS tex, in vec2 texC){
    ivec2 iTexC = ivec2(texC * textureSize(tex));
    return texelFetch(tex, iTexC, 0);
}

vec4 getDepth(in sampler2DMS tex,in vec2 texC){
      return textureFetch(tex,texC,m_NumSamplesDepth);
}
#endif

vec4 fetchTextureSample(in sampler2D tex,in vec2 texC,in int sample){
    return texture2D(tex,texC);
}

vec4 getColor(in sampler2D tex, in vec2 texC){
    return texture2D(tex,texC);
}

vec4 getColorSingle(in sampler2D tex, in vec2 texC){
    return texture2D(tex, texC);
}

vec4 getDepth(in sampler2D tex,in vec2 texC){
    return texture2D(tex,texC);
}