///////////////////////////////////////////////////////////////////////////////////
/// OpenGL Mathematics (glm.g-truc.net)
///
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/// @ref core
/// @file glm/detail/func_packing.hpp
/// @date 2010-03-17 / 2011-06-15
/// @author Christophe Riccio
///
/// @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"