/*
  ==============================================================================

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2020 - Raw Material Software Limited

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

namespace juce
{

/** @internal This macro contains a list of GL extension functions that need to be dynamically loaded on Windows/Linux.
    @see OpenGLExtensionFunctions
*/
#define JUCE_GL_BASE_FUNCTIONS(USE_FUNCTION) \
    USE_FUNCTION (glActiveTexture,          void, (GLenum p1), (p1))\
    USE_FUNCTION (glBindBuffer,             void, (GLenum p1, GLuint p2), (p1, p2))\
    USE_FUNCTION (glDeleteBuffers,          void, (GLsizei p1, const GLuint* p2), (p1, p2))\
    USE_FUNCTION (glGenBuffers,             void, (GLsizei p1, GLuint* p2), (p1, p2))\
    USE_FUNCTION (glBufferData,             void, (GLenum p1, GLsizeiptr p2, const GLvoid* p3, GLenum p4), (p1, p2, p3, p4))\
    USE_FUNCTION (glBufferSubData,          void, (GLenum p1, GLintptr p2, GLsizeiptr p3, const GLvoid* p4), (p1, p2, p3, p4))\
    USE_FUNCTION (glCreateProgram,          GLuint, (), ())\
    USE_FUNCTION (glDeleteProgram,          void, (GLuint p1), (p1))\
    USE_FUNCTION (glCreateShader,           GLuint, (GLenum p1), (p1))\
    USE_FUNCTION (glDeleteShader,           void, (GLuint p1), (p1))\
    USE_FUNCTION (glShaderSource,           void, (GLuint p1, GLsizei p2, const GLchar** p3, const GLint* p4), (p1, p2, p3, p4))\
    USE_FUNCTION (glCompileShader,          void, (GLuint p1), (p1))\
    USE_FUNCTION (glAttachShader,           void, (GLuint p1, GLuint p2), (p1, p2))\
    USE_FUNCTION (glLinkProgram,            void, (GLuint p1), (p1))\
    USE_FUNCTION (glUseProgram,             void, (GLuint p1), (p1))\
    USE_FUNCTION (glGetShaderiv,            void, (GLuint p1, GLenum p2, GLint* p3), (p1, p2, p3))\
    USE_FUNCTION (glGetShaderInfoLog,       void, (GLuint p1, GLsizei p2, GLsizei* p3, GLchar* p4), (p1, p2, p3, p4))\
    USE_FUNCTION (glGetProgramInfoLog,      void, (GLuint p1, GLsizei p2, GLsizei* p3, GLchar* p4), (p1, p2, p3, p4))\
    USE_FUNCTION (glGetProgramiv,           void, (GLuint p1, GLenum p2, GLint* p3), (p1, p2, p3))\
    USE_FUNCTION (glGetUniformLocation,     GLint, (GLuint p1, const GLchar* p2), (p1, p2))\
    USE_FUNCTION (glGetAttribLocation,      GLint, (GLuint p1, const GLchar* p2), (p1, p2))\
    USE_FUNCTION (glVertexAttribPointer,    void, (GLuint p1, GLint p2, GLenum p3, GLboolean p4, GLsizei p5, const GLvoid* p6), (p1, p2, p3, p4, p5, p6))\
    USE_FUNCTION (glEnableVertexAttribArray,  void, (GLuint p1), (p1))\
    USE_FUNCTION (glDisableVertexAttribArray, void, (GLuint p1), (p1))\
    USE_FUNCTION (glUniform1f,              void, (GLint p1, GLfloat p2), (p1, p2))\
    USE_FUNCTION (glUniform1i,              void, (GLint p1, GLint p2), (p1, p2))\
    USE_FUNCTION (glUniform2f,              void, (GLint p1, GLfloat p2, GLfloat p3), (p1, p2, p3))\
    USE_FUNCTION (glUniform3f,              void, (GLint p1, GLfloat p2, GLfloat p3, GLfloat p4), (p1, p2, p3, p4))\
    USE_FUNCTION (glUniform4f,              void, (GLint p1, GLfloat p2, GLfloat p3, GLfloat p4, GLfloat p5), (p1, p2, p3, p4, p5))\
    USE_FUNCTION (glUniform4i,              void, (GLint p1, GLint p2, GLint p3, GLint p4, GLint p5), (p1, p2, p3, p4, p5))\
    USE_FUNCTION (glUniform1fv,             void, (GLint p1, GLsizei p2, const GLfloat* p3), (p1, p2, p3))\
    USE_FUNCTION (glUniformMatrix2fv,       void, (GLint p1, GLsizei p2, GLboolean p3, const GLfloat* p4), (p1, p2, p3, p4))\
    USE_FUNCTION (glUniformMatrix3fv,       void, (GLint p1, GLsizei p2, GLboolean p3, const GLfloat* p4), (p1, p2, p3, p4))\
    USE_FUNCTION (glUniformMatrix4fv,       void, (GLint p1, GLsizei p2, GLboolean p3, const GLfloat* p4), (p1, p2, p3, p4))\
    USE_FUNCTION (glBindAttribLocation,     void, (GLuint p1, GLuint p2, const GLchar* p3), (p1, p2, p3))

/** @internal This macro contains a list of GL extension functions that need to be dynamically loaded on Windows/Linux.
    @see OpenGLExtensionFunctions
*/
#define JUCE_GL_EXTENSION_FUNCTIONS(USE_FUNCTION) \
    USE_FUNCTION (glIsRenderbuffer,         GLboolean, (GLuint p1), (p1))\
    USE_FUNCTION (glBindRenderbuffer,       void, (GLenum p1, GLuint p2), (p1, p2))\
    USE_FUNCTION (glDeleteRenderbuffers,    void, (GLsizei p1, const GLuint* p2), (p1, p2))\
    USE_FUNCTION (glGenRenderbuffers,       void, (GLsizei p1, GLuint* p2), (p1, p2))\
    USE_FUNCTION (glRenderbufferStorage,    void, (GLenum p1, GLenum p2, GLsizei p3, GLsizei p4), (p1, p2, p3, p4))\
    USE_FUNCTION (glGetRenderbufferParameteriv,  void, (GLenum p1, GLenum p2, GLint* p3), (p1, p2, p3))\
    USE_FUNCTION (glIsFramebuffer,          GLboolean, (GLuint p1), (p1))\
    USE_FUNCTION (glBindFramebuffer,        void, (GLenum p1, GLuint p2), (p1, p2))\
    USE_FUNCTION (glDeleteFramebuffers,     void, (GLsizei p1, const GLuint* p2), (p1, p2))\
    USE_FUNCTION (glGenFramebuffers,        void, (GLsizei p1, GLuint* p2), (p1, p2))\
    USE_FUNCTION (glCheckFramebufferStatus, GLenum, (GLenum p1), (p1))\
    USE_FUNCTION (glFramebufferTexture2D,   void, (GLenum p1, GLenum p2, GLenum p3, GLuint p4, GLint p5), (p1, p2, p3, p4, p5))\
    USE_FUNCTION (glFramebufferRenderbuffer,  void, (GLenum p1, GLenum p2, GLenum p3, GLuint p4), (p1, p2, p3, p4))\
    USE_FUNCTION (glGetFramebufferAttachmentParameteriv, void, (GLenum p1, GLenum p2, GLenum p3, GLint* p4), (p1, p2, p3, p4))

/** @internal This macro contains a list of GL extension functions that need to be dynamically loaded on Windows/Linux.
    @see OpenGLExtensionFunctions
*/
#define JUCE_GL_VERTEXBUFFER_FUNCTIONS(USE_FUNCTION) \
    USE_FUNCTION (glGenVertexArrays,        void, (GLsizei p1, GLuint* p2), (p1, p2))\
    USE_FUNCTION (glDeleteVertexArrays,     void, (GLsizei p1, const GLuint* p2), (p1, p2))\
    USE_FUNCTION (glBindVertexArray,        void, (GLuint p1), (p1))


/** This class contains a generated list of OpenGL extension functions, which are either dynamically loaded
    for a specific GL context, or simply call-through to the appropriate OS function where available.

    @tags{OpenGL}
*/
struct OpenGLExtensionFunctions
{
    void initialise();

   #if JUCE_WINDOWS && ! DOXYGEN
    typedef char GLchar;
    typedef pointer_sized_int GLsizeiptr;
    typedef pointer_sized_int GLintptr;
   #endif

    //==============================================================================
   #if JUCE_WINDOWS
    #define JUCE_DECLARE_GL_FUNCTION(name, returnType, params, callparams)      typedef returnType (__stdcall *type_ ## name) params; type_ ## name name;
    JUCE_GL_BASE_FUNCTIONS (JUCE_DECLARE_GL_FUNCTION)
    JUCE_GL_EXTENSION_FUNCTIONS (JUCE_DECLARE_GL_FUNCTION)
    #if JUCE_OPENGL3
     JUCE_GL_VERTEXBUFFER_FUNCTIONS (JUCE_DECLARE_GL_FUNCTION)
    #endif

    //==============================================================================
   #elif JUCE_LINUX
    #define JUCE_DECLARE_GL_FUNCTION(name, returnType, params, callparams)      typedef returnType (*type_ ## name) params; type_ ## name name;
    JUCE_GL_BASE_FUNCTIONS (JUCE_DECLARE_GL_FUNCTION)
    JUCE_GL_EXTENSION_FUNCTIONS (JUCE_DECLARE_GL_FUNCTION)
    #if JUCE_OPENGL3
     JUCE_GL_VERTEXBUFFER_FUNCTIONS (JUCE_DECLARE_GL_FUNCTION)
    #endif

    //==============================================================================
   #elif JUCE_OPENGL_ES
    #define JUCE_DECLARE_GL_FUNCTION(name, returnType, params, callparams)      static returnType name params noexcept;
    JUCE_GL_BASE_FUNCTIONS (JUCE_DECLARE_GL_FUNCTION)
    JUCE_GL_EXTENSION_FUNCTIONS (JUCE_DECLARE_GL_FUNCTION)
    JUCE_GL_VERTEXBUFFER_FUNCTIONS (JUCE_DECLARE_GL_FUNCTION)

    //==============================================================================
   #else
    #define JUCE_DECLARE_GL_FUNCTION(name, returnType, params, callparams)      static returnType name params noexcept { return ::name callparams; }
    JUCE_GL_BASE_FUNCTIONS (JUCE_DECLARE_GL_FUNCTION)

    #ifndef GL3_PROTOTYPES
     #undef JUCE_DECLARE_GL_FUNCTION
     #define JUCE_DECLARE_GL_FUNCTION(name, returnType, params, callparams)     static returnType name params noexcept { return ::name ## EXT callparams; }
    #endif
     JUCE_GL_EXTENSION_FUNCTIONS (JUCE_DECLARE_GL_FUNCTION)

    #if JUCE_OPENGL3
     #ifndef GL3_PROTOTYPES
      #undef JUCE_DECLARE_GL_FUNCTION
      #define JUCE_DECLARE_GL_FUNCTION(name, returnType, params, callparams)    static returnType name params noexcept { return ::name ## APPLE callparams; }
     #endif
     JUCE_GL_VERTEXBUFFER_FUNCTIONS (JUCE_DECLARE_GL_FUNCTION)
    #endif
   #endif

    #undef JUCE_DECLARE_GL_FUNCTION
};

} // namespace juce