half_inc.glsl

// Use of FP16 in Godot is done explicitly through the types half and hvec.
// The extensions must be supported by the system to use this shader.
//
// If EXPLICIT_FP16 is not defined, all operations will use full precision
// floats instead and all casting operations will not be performed.

#ifndef HALF_INC_H
#define HALF_INC_H

#ifdef EXPLICIT_FP16

#extension GL_EXT_shader_explicit_arithmetic_types_float16 : require
#extension GL_EXT_shader_16bit_storage : require

#define HALF_FLT_MIN float16_t(6.10352e-5)
#define HALF_FLT_MAX float16_t(65504.0)

#define half float16_t
#define hvec2 f16vec2
#define hvec3 f16vec3
#define hvec4 f16vec4
#define hmat2 f16mat2
#define hmat3 f16mat3
#define hmat4 f16mat4
#define saturateHalf(x) min(float16_t(x), HALF_FLT_MAX)

#else

#define HALF_FLT_MIN float(1.175494351e-38F)
#define HALF_FLT_MAX float(3.402823466e+38F)

#define half float
#define hvec2 vec2
#define hvec3 vec3
#define hvec4 vec4
#define hmat2 mat2
#define hmat3 mat3
#define hmat4 mat4
#define saturateHalf(x) (x)

#endif

#endif // HALF_INC_H