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Diffstat (limited to 'src/glm/core/func_packing.hpp')
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diff --git a/src/glm/core/func_packing.hpp b/src/glm/core/func_packing.hpp new file mode 100644 index 0000000..a84036a --- /dev/null +++ b/src/glm/core/func_packing.hpp @@ -0,0 +1,132 @@ +///////////////////////////////////////////////////////////////////////////////////////////////////
+// OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Created : 2010-03-17
+// Updated : 2010-03-17
+// Licence : This source is under MIT License
+// File : glm/core/func_packing.hpp
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+#ifndef glm_core_func_packing
+#define glm_core_func_packing
+
+namespace glm
+{
+ namespace core{
+ namespace function{
+ //! Define packing functions from section 8.4 floating-point pack and unpack functions of GLSL 4.00.8 specification
+ namespace packing
+ {
+ /// \addtogroup core_funcs
+ ///@{
+
+ //! 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.
+ //!
+ //! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/packUnorm2x16.xml">GLSL packUnorm2x16 man page</a>
+ //! \li GLSL 4.00.08 specification, section 8.4
+ detail::uint32 packUnorm2x16(detail::tvec2<detail::float32> 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.
+ //!
+ //! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/packUnorm4x8.xml">GLSL packUnorm4x8 man page</a>
+ //! \li GLSL 4.00.08 specification, section 8.4
+ detail::uint32 packUnorm4x8(detail::tvec4<detail::float32> 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.
+ //!
+ //! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/packSnorm4x8.xml">GLSL packSnorm4x8 man page</a>
+ //! \li GLSL 4.00.08 specification, section 8.4
+ detail::uint32 packSnorm4x8(detail::tvec4<detail::float32> 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.
+ //!
+ //! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/unpackUnorm2x16.xml">GLSL unpackUnorm2x16 man page</a>
+ //! \li GLSL 4.00.08 specification, section 8.4
+ detail::tvec2<detail::float32> unpackUnorm2x16(detail::uint32 const & 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.
+ //!
+ //! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/unpackUnorm4x8.xml">GLSL unpackUnorm4x8 man page</a>
+ //! \li GLSL 4.00.08 specification, section 8.4
+ detail::tvec4<detail::float32> unpackUnorm4x8(detail::uint32 const & 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.
+ //!
+ //! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/unpackSnorm4x8.xml">GLSL unpackSnorm4x8 man page</a>
+ //! \li GLSL 4.00.08 specification, section 8.4
+ detail::tvec4<detail::float32> unpackSnorm4x8(detail::uint32 const & 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.
+ //!
+ //! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/packDouble2x32.xml">GLSL packDouble2x32 man page</a>
+ //! \li GLSL 4.00.08 specification, section 8.4
+ double packDouble2x32(detail::tvec2<detail::uint32> 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.
+ //!
+ //! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/unpackDouble2x32.xml">GLSL unpackDouble2x32 man page</a>
+ //! \li GLSL 4.00.08 specification, section 8.4
+ detail::tvec2<detail::uint32> unpackDouble2x32(double const & v);
+
+ ///@}
+
+ }//namespace packing
+ }//namespace function
+ }//namespace core
+
+ using namespace core::function::packing;
+}//namespace glm
+
+#include "func_packing.inl"
+
+#endif//glm_core_func_packing
+
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