Detaches stage from shader. stage must have been successfully attached to shader with gstgl.glshader.GLShader.attach or gstgl.glshader.GLShader.attachUnlocked.
Note: must be called in the GL thread
a #GstGLSLStage to attach
Detaches stage from shader. stage must have been successfully attached to shader with gstgl.glshader.GLShader.attach or gstgl.glshader.GLShader.attachUnlocked.
Note: must be called in the GL thread