cobalt / cobalt / 3cd5432aaed8f14f27f66ade1b51aa71df939492 / . / third_party / glm / glm / detail / func_packing.hpp

/// @ref core | |

/// @file glm/detail/func_packing.hpp | |

/// | |

/// @see <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions</a> | |

/// @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 <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/packUnorm2x16.xml">GLSL packUnorm2x16 man page</a> | |

/// @see <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions</a> | |

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 <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/packSnorm2x16.xml">GLSL packSnorm2x16 man page</a> | |

/// @see <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions</a> | |

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 <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/packUnorm4x8.xml">GLSL packUnorm4x8 man page</a> | |

GLM_FUNC_DECL uint packUnorm4x8(vec4 const & v); | |

/// 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 <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/packSnorm4x8.xml">GLSL packSnorm4x8 man page</a> | |

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 <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/unpackUnorm2x16.xml">GLSL unpackUnorm2x16 man page</a> | |

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 <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/unpackSnorm2x16.xml">GLSL unpackSnorm2x16 man page</a> | |

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 <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/unpackUnorm4x8.xml">GLSL unpackUnorm4x8 man page</a> | |

GLM_FUNC_DECL vec4 unpackUnorm4x8(uint p); | |

/// | |

/// The conversion for unpacked fixed-point value f to floating point is done as follows: | |

/// unpackSnorm4x8: clamp(f / 127.0, -1, +1) | |

/// | |

/// the last component will be extracted from the most significant bits. | |

/// | |

/// @see <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/unpackSnorm4x8.xml">GLSL unpackSnorm4x8 man page</a> | |

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 <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/packDouble2x32.xml">GLSL packDouble2x32 man page</a> | |

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 <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/unpackDouble2x32.xml">GLSL unpackDouble2x32 man page</a> | |

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 <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/packHalf2x16.xml">GLSL packHalf2x16 man page</a> | |

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 <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/unpackHalf2x16.xml">GLSL unpackHalf2x16 man page</a> | |

GLM_FUNC_DECL vec2 unpackHalf2x16(uint v); | |

/// @} | |

}//namespace glm | |

#include "func_packing.inl" |