This function returns whether the specified API extension is supported by the current OpenGL or OpenGL ES context. It searches both for client API extension and context creation API extensions.
A context must be current on the calling thread. Calling this function without a current context will cause a GLFW_NO_CURRENT_CONTEXT error.
As this functions retrieves and searches one or more extension strings each call, it is recommended that you cache its results if it is going to be used frequently. The extension strings will not change during the lifetime of a context, so there is no danger in doing this.
This function does not apply to Vulkan. If you are using Vulkan, see glfwGetRequiredInstanceExtensions, vkEnumerateInstanceExtensionProperties and vkEnumerateDeviceExtensionProperties instead.
Parameters
extension: string
The ASCII encoded name of the extension.
Returns number
GLFW_TRUEif the extension is available, orGLFW_FALSE` otherwise.
This function returns whether the specified API extension is supported by the current OpenGL or OpenGL ES context. It searches both for client API extension and context creation API extensions.
A context must be current on the calling thread. Calling this function without a current context will cause a GLFW_NO_CURRENT_CONTEXT error.
As this functions retrieves and searches one or more extension strings each call, it is recommended that you cache its results if it is going to be used frequently. The extension strings will not change during the lifetime of a context, so there is no danger in doing this.
This function does not apply to Vulkan. If you are using Vulkan, see glfwGetRequiredInstanceExtensions,
vkEnumerateInstanceExtensionPropertiesandvkEnumerateDeviceExtensionPropertiesinstead.