lygia
/sampler
)It defines the default sampler type and function for the shader based on the version of GLSL.
#ifndef SAMPLER_FNC
#if __VERSION__ >= 300
#define SAMPLER_FNC(TEX, UV) texture(TEX, UV)
#else
#define SAMPLER_FNC(TEX, UV) texture2D(TEX, UV)
#endif
#endif
#ifndef SAMPLER_TYPE
#define SAMPLER_TYPE sampler2D
#endif
#if defined(__SHADER_TARGET_MAJOR) && __SHADER_TARGET_MAJOR < 4
#ifndef SAMPLER_FNC
#define SAMPLER_FNC(TEX, UV) tex2D(TEX, UV)
#endif
#ifndef SAMPLER_TYPE
#define SAMPLER_TYPE sampler2D
#endif
#else
// https://docs.unity3d.com/Manual/SL-SamplerStates.html
#ifndef SAMPLER_BILINEAR_CLAMP
#define SAMPLER_BILINEAR_CLAMP defaultLinearClampSampler
SamplerState SAMPLER_BILINEAR_CLAMP
{
Filter = MIN_MAG_MIP_LINEAR;
AddressU = Clamp;
AddressV = Clamp;
};
#endif
#ifndef SAMPLER_TRILINEAR_CLAMP
#define SAMPLER_TRILINEAR_CLAMP defaultTrilinearClampSampler
SamplerState SAMPLER_TRILINEAR_CLAMP
{
Filter = MIN_MAG_MIP_LINEAR;
AddressU = Clamp;
AddressV = Clamp;
};
#endif
#ifndef SAMPLER_FNC
#define SAMPLER_FNC(TEX, UV) TEX.Sample(SAMPLER_BILINEAR_CLAMP, UV)
#endif
#ifndef SAMPLER_TYPE
#define SAMPLER_TYPE Texture2D
#endif
#endif
#ifndef SAMPLER
#define SAMPLER sampler( min_filter::linear, mag_filter::linear )
#endif
#ifndef SAMPLER_FNC
#define SAMPLER_FNC(TEX, UV) TEX.sample(SAMPLER, UV)
#endif
#ifndef SAMPLER_TYPE
#define SAMPLER_TYPE texture2d<float>
#endif
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