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Diffstat (limited to 'include/SFML/Graphics/Glsl.inl')
| -rw-r--r-- | include/SFML/Graphics/Glsl.inl | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/include/SFML/Graphics/Glsl.inl b/include/SFML/Graphics/Glsl.inl new file mode 100644 index 0000000..3f2b027 --- /dev/null +++ b/include/SFML/Graphics/Glsl.inl @@ -0,0 +1,155 @@ +//////////////////////////////////////////////////////////// +// +// SFML - Simple and Fast Multimedia Library +// Copyright (C) 2007-2016 Laurent Gomila (laurent@sfml-dev.org) +// +// This software is provided 'as-is', without any express or implied warranty. +// In no event will the authors be held liable for any damages arising from the use of this software. +// +// Permission is granted to anyone to use this software for any purpose, +// including commercial applications, and to alter it and redistribute it freely, +// subject to the following restrictions: +// +// 1. The origin of this software must not be misrepresented; +// you must not claim that you wrote the original software. +// If you use this software in a product, an acknowledgment +// in the product documentation would be appreciated but is not required. +// +// 2. Altered source versions must be plainly marked as such, +// and must not be misrepresented as being the original software. +// +// 3. This notice may not be removed or altered from any source distribution. +// +//////////////////////////////////////////////////////////// + + +//////////////////////////////////////////////////////////// +/// \brief Helper functions to copy sf::Transform to sf::Glsl::Mat3/4 +/// +//////////////////////////////////////////////////////////// +void SFML_GRAPHICS_API copyMatrix(const Transform& source, Matrix<3, 3>& dest); +void SFML_GRAPHICS_API copyMatrix(const Transform& source, Matrix<4, 4>& dest); + +//////////////////////////////////////////////////////////// +/// \brief Copy array-based matrix with given number of elements +/// +/// Indirection to std::copy() to avoid inclusion of +/// <algorithm> and MSVC's annoying 4996 warning in header +/// +//////////////////////////////////////////////////////////// +void SFML_GRAPHICS_API copyMatrix(const float* source, std::size_t elements, float* dest); + +//////////////////////////////////////////////////////////// +/// \brief Helper functions to copy sf::Color to sf::Glsl::Vec4/Ivec4 +/// +//////////////////////////////////////////////////////////// +void SFML_GRAPHICS_API copyVector(const Color& source, Vector4<float>& dest); +void SFML_GRAPHICS_API copyVector(const Color& source, Vector4<int>& dest); + + +//////////////////////////////////////////////////////////// +/// \brief Matrix type, used to set uniforms in GLSL +/// +//////////////////////////////////////////////////////////// +template <std::size_t Columns, std::size_t Rows> +struct Matrix +{ + //////////////////////////////////////////////////////////// + /// \brief Construct from raw data + /// + /// \param pointer Points to the beginning of an array that + /// has the size of the matrix. The elements + /// are copied to the instance. + /// + //////////////////////////////////////////////////////////// + explicit Matrix(const float* pointer) + { + copyMatrix(pointer, Columns * Rows, array); + } + + //////////////////////////////////////////////////////////// + /// \brief Construct implicitly from SFML transform + /// + /// This constructor is only supported for 3x3 and 4x4 + /// matrices. + /// + /// \param transform Object containing a transform. + /// + //////////////////////////////////////////////////////////// + Matrix(const Transform& transform) + { + copyMatrix(transform, *this); + } + + float array[Columns * Rows]; ///< Array holding matrix data +}; + +//////////////////////////////////////////////////////////// +/// \brief 4D vector type, used to set uniforms in GLSL +/// +//////////////////////////////////////////////////////////// +template <typename T> +struct Vector4 +{ + //////////////////////////////////////////////////////////// + /// \brief Default constructor, creates a zero vector + /// + //////////////////////////////////////////////////////////// + Vector4() : + x(0), + y(0), + z(0), + w(0) + { + } + + //////////////////////////////////////////////////////////// + /// \brief Construct from 4 vector components + /// + /// \param X Component of the 4D vector + /// \param Y Component of the 4D vector + /// \param Z Component of the 4D vector + /// \param W Component of the 4D vector + /// + //////////////////////////////////////////////////////////// + Vector4(T X, T Y, T Z, T W) : + x(X), + y(Y), + z(Z), + w(W) + { + } + + //////////////////////////////////////////////////////////// + /// \brief Conversion constructor + /// + /// \param other 4D vector of different type + /// + //////////////////////////////////////////////////////////// + template <typename U> + explicit Vector4(const Vector4<U>& other) : + x(static_cast<T>(other.x)), + y(static_cast<T>(other.y)), + z(static_cast<T>(other.z)), + w(static_cast<T>(other.w)) + { + } + + //////////////////////////////////////////////////////////// + /// \brief Construct float vector implicitly from color + /// + /// \param color Color instance. Is normalized to [0, 1] + /// for floats, and left as-is for ints. + /// + //////////////////////////////////////////////////////////// + Vector4(const Color& color) + // uninitialized + { + copyVector(color, *this); + } + + T x; ///< 1st component (X) of the 4D vector + T y; ///< 2nd component (Y) of the 4D vector + T z; ///< 3rd component (Z) of the 4D vector + T w; ///< 4th component (W) of the 4D vector +}; |