Why Does OpenGL Initialization Fail on Intel HD 3000?

What is the proper OpenGL initialisation on Intel HD 3000?

You have encountered an issue with Intel graphics HD 3000 on a Toshiba notebook running Windows 7 x32 with C . Classical single-context OpenGL applications function properly, but multiple OpenGL contexts within a single app create unexpected behavior:

1. Older versions of your app cannot establish a second rendering context on Intel drivers.
2. After significant updates to your OpenGL-based software architecture, you can now create a second rendering context, but it becomes invalid upon its release.

Am I doing something wrong?

Your OpenGL engine is fully functional with GL, GLSL, VBO, and VAO, and has been tested extensively. However, this issue arises only with Intel graphics cards. Nvidia cards operate normally, while ATI/AMD cards exhibit occasional issues due to driver bugs, particularly with VBOs and indices.

Is there a better way to init/exit OpenGL?

It is recommended to use a loader library instead of attempting to initialize OpenGL manually. SFML and GLEW (for Windows) are commonly used loader libraries that can simplify the process.

How to properly switch between different rendering contexts?

Your use of wglMakeCurrent to switch between rendering contexts appears correct. However, some workarounds may be necessary for Intel graphics.

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