slang-shaders/include/compat_macros.inc

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// compatibility macros for transparently converting HLSLisms into GLSLisms
#define mul(a,b) (b*a)
#define lerp(a,b,c) mix(a,b,c)
#define saturate(c) clamp(c, 0.0, 1.0)
#define frac(x) (fract(x))
#define float2 vec2
#define float3 vec3
#define float4 vec4
#define bool2 bvec2
#define bool3 bvec3
#define bool4 bvec4
#define float2x2 mat2x2
#define float3x3 mat3x3
#define float4x4 mat4x4
#define float4x3 mat4x3
#define float2x4 mat2x4
#define IN params
#define texture_size SourceSize.xy
#define video_size SourceSize.xy
#define output_size OutputSize.xy
#define frame_count FrameCount
#define static
#define inline
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#define const
#define fmod(x,y) mod(x,y)
#define ddx(c) dFdx(c)
#define ddy(c) dFdy(c)
#define atan2(x,y) atan(x,y)
#define rsqrt(c) inversesqrt(c)