OpenGL.GL.ARB.shader_stencil_export

OpenGL extension ARB.shader_stencil_export

This module customises the behaviour of the OpenGL.raw.GL.ARB.shader_stencil_export to provide a more Python-friendly API

Overview (from the spec)

In OpenGL, the stencil test is a powerful mechanism to selectively discard fragments based on the content of the stencil buffer. However, facilites to update the content of the stencil buffer are limited to operations such as incrementing the existing value, or overwriting with a fixed reference value.

This extension provides a mechanism whereby a shader may generate the stencil reference value per invocation. When stencil testing is enabled, this allows the test to be performed against the value generated in the shader. When the stencil operation is set to GL_REPLACE, this allows a value generated in the shader to be written to the stencil buffer directly.

The official definition of this extension is available here: http://www.opengl.org/registry/specs/ARB/shader_stencil_export.txt