GLRENDERBUFFERSTENCILSIZE
GLRENDERBUFFERSTENCILSIZE is a token used in OpenGL. It represents the number of bits per sample in the stencil buffer of the currently bound renderbuffer object. When querying renderbuffer storage, this value indicates the width of the stencil buffer in bits. The stencil buffer is a component of an OpenGL framebuffer that stores stencil data, which is used for various rendering techniques such as stencil shadows, masking, and anti-aliasing. The specific number of bits allocated for the stencil buffer can influence the precision and capabilities of these stencil-based operations. The GLRENDERBUFFERSTENCILSIZE query is typically performed using the glGetRenderbufferParameteriv function, where GLRENDERBUFFERSTENCILSIZE is passed as the pname argument. The returned value will be an integer representing the number of bits. For example, a value of 8 would mean that each stencil sample uses 8 bits of storage. The availability and size of the stencil buffer are dependent on the underlying hardware and the OpenGL driver implementation. Not all configurations will necessarily have a stencil buffer, or they may have different sizes available.