From e62817b8252974b8a98393275874ee303840bf13 Mon Sep 17 00:00:00 2001 From: LaG1924 <12997935+LaG1924@users.noreply.github.com> Date: Fri, 12 May 2017 18:49:50 +0500 Subject: 2017-05-12 --- depedencies/include/glm/detail/func_packing.hpp | 168 ++++++++++++++++++++++++ 1 file changed, 168 insertions(+) create mode 100644 depedencies/include/glm/detail/func_packing.hpp (limited to 'depedencies/include/glm/detail/func_packing.hpp') diff --git a/depedencies/include/glm/detail/func_packing.hpp b/depedencies/include/glm/detail/func_packing.hpp new file mode 100644 index 0000000..47e074b --- /dev/null +++ b/depedencies/include/glm/detail/func_packing.hpp @@ -0,0 +1,168 @@ +/// @ref core +/// @file glm/detail/func_packing.hpp +/// +/// @see GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions +/// @see gtc_packing +/// +/// @defgroup core_func_packing Floating-Point Pack and Unpack Functions +/// @ingroup core +/// +/// These functions do not operate component-wise, rather as described in each case. + +#pragma once + +#include "type_vec2.hpp" +#include "type_vec4.hpp" + +namespace glm +{ + /// @addtogroup core_func_packing + /// @{ + + /// First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. + /// Then, the results are packed into the returned 32-bit unsigned integer. + /// + /// The conversion for component c of v to fixed point is done as follows: + /// packUnorm2x16: round(clamp(c, 0, +1) * 65535.0) + /// + /// The first component of the vector will be written to the least significant bits of the output; + /// the last component will be written to the most significant bits. + /// + /// @see GLSL packUnorm2x16 man page + /// @see GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions + GLM_FUNC_DECL uint packUnorm2x16(vec2 const & v); + + /// First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. + /// Then, the results are packed into the returned 32-bit unsigned integer. + /// + /// The conversion for component c of v to fixed point is done as follows: + /// packSnorm2x16: round(clamp(v, -1, +1) * 32767.0) + /// + /// The first component of the vector will be written to the least significant bits of the output; + /// the last component will be written to the most significant bits. + /// + /// @see GLSL packSnorm2x16 man page + /// @see GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions + GLM_FUNC_DECL uint packSnorm2x16(vec2 const & v); + + /// First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. + /// Then, the results are packed into the returned 32-bit unsigned integer. + /// + /// The conversion for component c of v to fixed point is done as follows: + /// packUnorm4x8: round(clamp(c, 0, +1) * 255.0) + /// + /// The first component of the vector will be written to the least significant bits of the output; + /// the last component will be written to the most significant bits. + /// + /// @see GLSL packUnorm4x8 man page + /// @see GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions + GLM_FUNC_DECL uint packUnorm4x8(vec4 const & v); + + /// First, converts each component of the normalized floating-point value v into 8- or 16-bit integer values. + /// Then, the results are packed into the returned 32-bit unsigned integer. + /// + /// The conversion for component c of v to fixed point is done as follows: + /// packSnorm4x8: round(clamp(c, -1, +1) * 127.0) + /// + /// The first component of the vector will be written to the least significant bits of the output; + /// the last component will be written to the most significant bits. + /// + /// @see GLSL packSnorm4x8 man page + /// @see GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions + GLM_FUNC_DECL uint packSnorm4x8(vec4 const & v); + + /// First, unpacks a single 32-bit unsigned integer p into a pair of 16-bit unsigned integers, four 8-bit unsigned integers, or four 8-bit signed integers. + /// Then, each component is converted to a normalized floating-point value to generate the returned two- or four-component vector. + /// + /// The conversion for unpacked fixed-point value f to floating point is done as follows: + /// unpackUnorm2x16: f / 65535.0 + /// + /// The first component of the returned vector will be extracted from the least significant bits of the input; + /// the last component will be extracted from the most significant bits. + /// + /// @see GLSL unpackUnorm2x16 man page + /// @see GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions + GLM_FUNC_DECL vec2 unpackUnorm2x16(uint p); + + /// First, unpacks a single 32-bit unsigned integer p into a pair of 16-bit unsigned integers, four 8-bit unsigned integers, or four 8-bit signed integers. + /// Then, each component is converted to a normalized floating-point value to generate the returned two- or four-component vector. + /// + /// The conversion for unpacked fixed-point value f to floating point is done as follows: + /// unpackSnorm2x16: clamp(f / 32767.0, -1, +1) + /// + /// The first component of the returned vector will be extracted from the least significant bits of the input; + /// the last component will be extracted from the most significant bits. + /// + /// @see GLSL unpackSnorm2x16 man page + /// @see GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions + GLM_FUNC_DECL vec2 unpackSnorm2x16(uint p); + + /// First, unpacks a single 32-bit unsigned integer p into a pair of 16-bit unsigned integers, four 8-bit unsigned integers, or four 8-bit signed integers. + /// Then, each component is converted to a normalized floating-point value to generate the returned two- or four-component vector. + /// + /// The conversion for unpacked fixed-point value f to floating point is done as follows: + /// unpackUnorm4x8: f / 255.0 + /// + /// The first component of the returned vector will be extracted from the least significant bits of the input; + /// the last component will be extracted from the most significant bits. + /// + /// @see GLSL unpackUnorm4x8 man page + /// @see GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions + GLM_FUNC_DECL vec4 unpackUnorm4x8(uint p); + + /// First, unpacks a single 32-bit unsigned integer p into a pair of 16-bit unsigned integers, four 8-bit unsigned integers, or four 8-bit signed integers. + /// Then, each component is converted to a normalized floating-point value to generate the returned two- or four-component vector. + /// + /// The conversion for unpacked fixed-point value f to floating point is done as follows: + /// unpackSnorm4x8: clamp(f / 127.0, -1, +1) + /// + /// The first component of the returned vector will be extracted from the least significant bits of the input; + /// the last component will be extracted from the most significant bits. + /// + /// @see GLSL unpackSnorm4x8 man page + /// @see GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions + GLM_FUNC_DECL vec4 unpackSnorm4x8(uint p); + + /// Returns a double-precision value obtained by packing the components of v into a 64-bit value. + /// If an IEEE 754 Inf or NaN is created, it will not signal, and the resulting floating point value is unspecified. + /// Otherwise, the bit- level representation of v is preserved. + /// The first vector component specifies the 32 least significant bits; + /// the second component specifies the 32 most significant bits. + /// + /// @see GLSL packDouble2x32 man page + /// @see GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions + GLM_FUNC_DECL double packDouble2x32(uvec2 const & v); + + /// Returns a two-component unsigned integer vector representation of v. + /// The bit-level representation of v is preserved. + /// The first component of the vector contains the 32 least significant bits of the double; + /// the second component consists the 32 most significant bits. + /// + /// @see GLSL unpackDouble2x32 man page + /// @see GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions + GLM_FUNC_DECL uvec2 unpackDouble2x32(double v); + + /// Returns an unsigned integer obtained by converting the components of a two-component floating-point vector + /// to the 16-bit floating-point representation found in the OpenGL Specification, + /// and then packing these two 16- bit integers into a 32-bit unsigned integer. + /// The first vector component specifies the 16 least-significant bits of the result; + /// the second component specifies the 16 most-significant bits. + /// + /// @see GLSL packHalf2x16 man page + /// @see GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions + GLM_FUNC_DECL uint packHalf2x16(vec2 const & v); + + /// Returns a two-component floating-point vector with components obtained by unpacking a 32-bit unsigned integer into a pair of 16-bit values, + /// interpreting those values as 16-bit floating-point numbers according to the OpenGL Specification, + /// and converting them to 32-bit floating-point values. + /// The first component of the vector is obtained from the 16 least-significant bits of v; + /// the second component is obtained from the 16 most-significant bits of v. + /// + /// @see GLSL unpackHalf2x16 man page + /// @see GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions + GLM_FUNC_DECL vec2 unpackHalf2x16(uint v); + + /// @} +}//namespace glm + +#include "func_packing.inl" -- cgit v1.2.3