//Pobrane z http://www.opengl.org/registry/

//#include <gl/GL.h>
#include "wglext.h"
#include "glext.h"

/* Do COknoGL::InitWGL */

/*
//wyjete z glext.h
#define GL_MAJOR_VERSION 0x821B 
#define GL_MINOR_VERSION 0x821C

//wyjete z wglext.h
#define WGL_CONTEXT_MAJOR_VERSION_ARB  0x2091
#define WGL_CONTEXT_MINOR_VERSION_ARB  0x2092
#define WGL_CONTEXT_FLAGS_ARB          0x2094
#define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x00000002
#define WGL_CONTEXT_PROFILE_MASK_ARB   0x9126
#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
#define WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002

typedef HGLRC (WINAPI * PFNWGLCREATECONTEXTATTRIBSARBPROC) (HDC hDC, HGLRC hShareContext, const int *attribList);
*/
PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;

/* Do COknoGL::InitBuforWerteksow i COknoGL::UsunBuforWerteksow */
/*
//VAO
//#define GL_VERTEX_ARRAY_BINDING  0x85B5
typedef void (WINAPI * PFNGLBINDVERTEXARRAYPROC) (GLuint array);
typedef void (WINAPI * PFNGLDELETEVERTEXARRAYSPROC) (GLsizei n, const GLuint *arrays);
typedef void (WINAPI * PFNGLGENVERTEXARRAYSPROC) (GLsizei n, GLuint *arrays);
typedef GLboolean (WINAPI * PFNGLISVERTEXARRAYPROC) (GLuint array);
*/
PFNGLBINDVERTEXARRAYPROC glBindVertexArray;
PFNGLDELETEVERTEXARRAYSPROC glDeleteVertexArrays;
PFNGLGENVERTEXARRAYSPROC glGenVertexArrays;
PFNGLISVERTEXARRAYPROC glIsVertexArray;

//VBO
/*
typedef ptrdiff_t GLsizeiptr;
#define GL_ARRAY_BUFFER  0x8892
#define GL_STATIC_DRAW   0x88E4
typedef void (WINAPI * PFNGLBINDBUFFERPROC) (GLenum target, GLuint buffer);
typedef void (WINAPI * PFNGLDELETEBUFFERSPROC) (GLsizei n, const GLuint *buffers);
typedef void (WINAPI * PFNGLGENBUFFERSPROC) (GLsizei n, GLuint *buffers);
typedef GLboolean (WINAPI * PFNGLISBUFFERPROC) (GLuint buffer);
typedef void (WINAPI * PFNGLBUFFERDATAPROC) (GLenum target, GLsizeiptr size, const GLvoid *data, GLenum usage);
*/
PFNGLBINDBUFFERPROC glBindBuffer;
PFNGLDELETEBUFFERSPROC glDeleteBuffers;
PFNGLGENBUFFERSPROC glGenBuffers;
PFNGLISBUFFERPROC glIsBuffer;
PFNGLBUFFERDATAPROC glBufferData;
PFNGLENABLEVERTEXATTRIBARRAYPROC glEnableVertexAttribArray;
PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer;
PFNGLDISABLEVERTEXATTRIBARRAYPROC glDisableVertexAttribArray;

/* Pobieranie adresow funkcji */

void InitAPI()
{
	//do COknoGL::InitWGL
	wglCreateContextAttribsARB = reinterpret_cast<PFNWGLCREATECONTEXTATTRIBSARBPROC>(::wglGetProcAddress("wglCreateContextAttribsARB"));
	
	//VAO
	glBindVertexArray = reinterpret_cast<PFNGLBINDVERTEXARRAYPROC>(::wglGetProcAddress("glBindVertexArray"));
	glDeleteVertexArrays = reinterpret_cast<PFNGLDELETEVERTEXARRAYSPROC>(::wglGetProcAddress("glDeleteVertexArrays"));
	glGenVertexArrays = reinterpret_cast<PFNGLGENVERTEXARRAYSPROC>(::wglGetProcAddress("glGenVertexArrays"));
	glIsVertexArray = reinterpret_cast<PFNGLISVERTEXARRAYPROC>(::wglGetProcAddress("glIsVertexArray"));

	//VBO
	glBindBuffer = reinterpret_cast<PFNGLBINDBUFFERPROC>(::wglGetProcAddress("glBindBuffer"));
	glDeleteBuffers = reinterpret_cast<PFNGLDELETEBUFFERSPROC>(::wglGetProcAddress("glDeleteBuffers"));
	glGenBuffers = reinterpret_cast<PFNGLGENBUFFERSPROC>(::wglGetProcAddress("glGenBuffers"));
	glIsBuffer = reinterpret_cast<PFNGLISBUFFERPROC>(::wglGetProcAddress("glIsBuffer"));
	glBufferData = reinterpret_cast<PFNGLBUFFERDATAPROC>(::wglGetProcAddress("glBufferData"));
	glEnableVertexAttribArray = reinterpret_cast<PFNGLENABLEVERTEXATTRIBARRAYPROC>(::wglGetProcAddress("glEnableVertexAttribArray"));
	glVertexAttribPointer = reinterpret_cast<PFNGLVERTEXATTRIBPOINTERPROC>(::wglGetProcAddress("glVertexAttribPointer"));
	glDisableVertexAttribArray = reinterpret_cast<PFNGLDISABLEVERTEXATTRIBARRAYPROC>(::wglGetProcAddress("glDisableVertexAttribArray"));
}