I am creating a custom Drawable that needs to push a Fragment Shader
into the current rendering state and then, after a single extension
call, subsequently remove this shader from the state.
I have some code I noodled through to make this work, but I feel like
there is probably a better way. It goes something like this:
----------------------------------------
drawImplementaion(RenderInfo& ri) {
State* state = ri.getState();
unsigned int contextID = state->getContextID();
_program.apply(state);
myExtensions->doMycall();
GL2Extensions::Get(contextID, true)->glUseProgram(0);
state->setLastAppliedProgramObject(0);
}
----------------------------------------
Like I said above, this "works", but I feel like there is probably a
cleaner way to achieve what I want. Note that _program is a ref_ptr to a
properly create osg::Program object, since I certainly do NOT want to
recreate all the goodness it provides. :)
Any API advice?
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