initial commit, 4.5 stable

servers/rendering/renderer_rd/shaders/half_inc.glsl

@@ -0,0 +1,43 @@
+// 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