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#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
#if defined(GL_ARB_texture_multisample) || (defined GL_ES && __VERSION__>=310)
vec4 textureFetch(in sampler2DMS tex,in vec2 texC, in int numSamples){
      ivec2 iTexC = ivec2(texC * vec2(textureSize(tex)));
      vec4 color = vec4(0.0);
      for (int i = 0; i < numSamples; i++){
         color += texelFetch(tex, iTexC, i);
      }
      return color / float(numSamples);
}

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

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 * vec2(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 sampleId){
    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);
}