How to use WGL_CONTEXT_MAJOR_VERSION_ARB and WGL_CONTEXT_MINOR_VERSION_ARB on Windows?

OpenGL OpenGL: Basic Coding
1

WinMain.cpp

#define WGL_CONTEXT_MAJOR_VERSION_ARB     0x2091
#define WGL_CONTEXT_MINOR_VERSION_ARB     0x2092
#define WGL_CONTEXT_FLAGS_ARB             0x2094
#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB  0x00000001
#define WGL_CONTEXT_PROFILE_MASK_ARB      0x9126
typedef HGLRC(WINAPI* PFNWGLCREATECONTEXTATTRIBSARBPROC) (HDC, HGLRC, const int*);

I tried a couple of hexidecimal to decimal converters on 0x2091 and 0x2902 for the WGL_CONTEXT_MAJOR_VERSION_ARB and WGL_CONTEXT_MINOR_VERSION_ARB values. Things don’t seem to convert anything close to the OpenGL 3 for major and three for the minor context that is being loaded here. WinMain.cpp is set up to load with glad (Hands-On-Game-Animation-Programming-master.zip, Packt publishing). I have the Iris Xe graphics card which does seem to load a 4.6 context running on Windows 11 Pro.

So far I tried setting 4 for the major ARB and 6 for the minor ARB but there is some type of fault being generated by Visual Studio… So far I have 0x2091 converting to 8337 in decimal which does not seem to be anything close to 3 like the context that is being loaded?

So in this case with glad set up how should I set up WGL_CONTEXT_MAJOR_VERSION_ARB, and WGL_CONTEXT_MINOR_VERSION_ARB (and whatever else needs to be changed it?) to load an OpenGL 4.6 context?

2

Those are just enumerators, numbers which are used to identify properties or settings. You’re supposed to use them to specify which version of OpenGL you want.

3

WinMain.cpp

	WGL_CONTEXT_MAJOR_VERSION_ARB, 4,
	WGL_CONTEXT_MINOR_VERSION_ARB, 6,

I replaced GLAD with a 4.6 profile I downloaded from the GLAD site. So far the problem is that there is an access violation reading at the line posted below. Any way to get a 4.6 context starting on Windows 11 Pro with Intel Iris Xe?

bool swapControlSupported = strstr(_wglGetExtensionsStringEXT(), "WGL_EXT_swap_control") != 0;
4

Try:

fprintf( stderr, "wglGetExtensionsString() = %p\n", wglGetExtensionsString() );

If it’s NULL, see this in WGL_EXT_extensions_string:

Also…:

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