Attaches stage to shader. stage must have been successfully compiled with gstgl.glslstage.GLSLStage.compile.
Note: must be called in the GL thread
a #GstGLSLStage to attach
whether stage could be attached to shader
Attaches stage to shader. stage must have been successfully compiled with gstgl.glslstage.GLSLStage.compile.
Note: must be called in the GL thread