#ifndef OPENGL_UTILS_H
#define OPENGL_UTILS_H
#include "glcorearb.h"
#include "wglext.h"

/* wgl */
typedef HGLRC(APIENTRYP PFNWGLCREATECONTEXTPROC)(HDC);
typedef BOOL(APIENTRYP PFNWGLDELETECONTEXTPROC)(HGLRC);
typedef PROC(APIENTRYP PFNWGLGETPROCADDRESSPROC)(LPCSTR);
typedef BOOL(APIENTRYP PFNWGLMAKECURRENTPROC)(HDC, HGLRC);

extern PFNWGLCREATECONTEXTPROC xwglCreateContext;
extern PFNWGLDELETECONTEXTPROC xwglDeleteContext;
extern PFNWGLGETPROCADDRESSPROC xwglGetProcAddress;
extern PFNWGLMAKECURRENTPROC xwglMakeCurrent;
extern PFNWGLSWAPINTERVALEXTPROC wglSwapIntervalEXT;
extern PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB;
extern PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;


/* compat profile only ---> */
#define GL_LUMINANCE                      0x1909
#define GL_LUMINANCE8                     0x8040
typedef void (APIENTRYP PFNGLBEGINPROC)(GLenum mode);
typedef void (APIENTRYP PFNGLENDPROC)(void);
typedef void (APIENTRYP PFNGLTEXCOORD2FPROC)(GLfloat s, GLfloat t);
typedef void (APIENTRYP PFNGLVERTEX2FPROC)(GLfloat x, GLfloat y);

extern PFNGLBEGINPROC glBegin;
extern PFNGLENDPROC glEnd;
extern PFNGLTEXCOORD2FPROC glTexCoord2f;
extern PFNGLVERTEX2FPROC glVertex2f;
/* <--- compat profile only */


BOOL oglu_load_dll();
void oglu_init();
BOOL oglu_ext_exists(char* ext, HDC hdc);
GLuint oglu_build_program(GLchar* vert_source, GLchar* frag_source, BOOL core_profile);
GLuint oglu_build_program_from_file(const char* file_path, BOOL core_profile);

extern PFNGLVIEWPORTPROC glViewport;
extern PFNGLBINDTEXTUREPROC glBindTexture;
extern PFNGLGENTEXTURESPROC glGenTextures;
extern PFNGLTEXPARAMETERIPROC glTexParameteri;
extern PFNGLDELETETEXTURESPROC glDeleteTextures;
extern PFNGLTEXIMAGE2DPROC glTexImage2D;
extern PFNGLDRAWELEMENTSPROC glDrawElements;
extern PFNGLTEXSUBIMAGE2DPROC glTexSubImage2D;
extern PFNGLGETERRORPROC glGetError;
extern PFNGLGETSTRINGPROC glGetString;
extern PFNGLGETTEXIMAGEPROC glGetTexImage;
extern PFNGLPIXELSTOREIPROC glPixelStorei;
extern PFNGLENABLEPROC glEnable;
extern PFNGLCLEARPROC glClear;
extern PFNGLCREATEPROGRAMPROC glCreateProgram;
extern PFNGLDELETEPROGRAMPROC glDeleteProgram;
extern PFNGLUSEPROGRAMPROC glUseProgram;
extern PFNGLATTACHSHADERPROC glAttachShader;
extern PFNGLDETACHSHADERPROC glDetachShader;
extern PFNGLLINKPROGRAMPROC glLinkProgram;
extern PFNGLGETPROGRAMIVPROC glGetProgramiv;
extern PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog;
extern PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation;
extern PFNGLUNIFORM1IPROC glUniform1i;
extern PFNGLUNIFORM1IVPROC glUniform1iv;
extern PFNGLUNIFORM2IVPROC glUniform2iv;
extern PFNGLUNIFORM3IVPROC glUniform3iv;
extern PFNGLUNIFORM4IVPROC glUniform4iv;
extern PFNGLUNIFORM1FPROC glUniform1f;
extern PFNGLUNIFORM1FVPROC glUniform1fv;
extern PFNGLUNIFORM2FVPROC glUniform2fv;
extern PFNGLUNIFORM3FVPROC glUniform3fv;
extern PFNGLUNIFORM4FVPROC glUniform4fv;
extern PFNGLUNIFORM4FPROC glUniform4f;
extern PFNGLUNIFORMMATRIX4FVPROC glUniformMatrix4fv;
extern PFNGLGETATTRIBLOCATIONPROC glGetAttribLocation;
extern PFNGLVERTEXATTRIB1FPROC glVertexAttrib1f;
extern PFNGLVERTEXATTRIB1FVPROC glVertexAttrib1fv;
extern PFNGLVERTEXATTRIB2FVPROC glVertexAttrib2fv;
extern PFNGLVERTEXATTRIB3FVPROC glVertexAttrib3fv;
extern PFNGLVERTEXATTRIB4FVPROC glVertexAttrib4fv;
extern PFNGLENABLEVERTEXATTRIBARRAYPROC glEnableVertexAttribArray;
extern PFNGLDISABLEVERTEXATTRIBARRAYPROC glDisableVertexAttribArray;
extern PFNGLBINDATTRIBLOCATIONPROC glBindAttribLocation;
extern PFNGLGETACTIVEUNIFORMPROC glGetActiveUniform;
extern PFNGLCREATESHADERPROC glCreateShader;
extern PFNGLDELETESHADERPROC glDeleteShader;
extern PFNGLSHADERSOURCEPROC glShaderSource;
extern PFNGLCOMPILESHADERPROC glCompileShader;
extern PFNGLGETSHADERIVPROC glGetShaderiv;
extern PFNGLGENBUFFERSPROC glGenBuffers;
extern PFNGLBINDBUFFERPROC	glBindBuffer;
extern PFNGLBUFFERDATAPROC	glBufferData;
extern PFNGLMAPBUFFERPROC glMapBuffer;
extern PFNGLUNMAPBUFFERPROC glUnmapBuffer;
extern PFNGLBUFFERSUBDATAPROC glBufferSubData;
extern PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer;
extern PFNGLDELETEBUFFERSPROC glDeleteBuffers;
extern PFNGLGENVERTEXARRAYSPROC glGenVertexArrays;
extern PFNGLBINDVERTEXARRAYPROC glBindVertexArray;
extern PFNGLDELETEVERTEXARRAYSPROC glDeleteVertexArrays;
extern PFNGLACTIVETEXTUREPROC glActiveTexture;
extern PFNGLGENFRAMEBUFFERSPROC glGenFramebuffers;
extern PFNGLBINDFRAMEBUFFERPROC glBindFramebuffer;
extern PFNGLFRAMEBUFFERTEXTURE2DPROC glFramebufferTexture2D;
extern PFNGLDRAWBUFFERSPROC glDrawBuffers;
extern PFNGLCHECKFRAMEBUFFERSTATUSPROC glCheckFramebufferStatus;
extern PFNGLDELETEFRAMEBUFFERSPROC glDeleteFramebuffers;
extern PFNGLTEXBUFFERPROC glTexBuffer;

extern HMODULE g_oglu_hmodule;
extern BOOL g_oglu_got_version2;
extern BOOL g_oglu_got_version3;
extern char g_oglu_version[];

#endif