Method Execute

Hydrogent/src/Tasks/HnBeginMainPassTask.cpp:70–115

}

void HnBeginMainPassTask::Execute(pxr::HdTaskContext* TaskCtx)
{
    if (m_RenderIndex == nullptr)
    {
        UNEXPECTED("Render index is null. This likely indicates that Prepare() has not been called.");
        return;
    }

    HnRenderDelegate* RenderDelegate = static_cast<HnRenderDelegate*>(m_RenderIndex->GetRenderDelegate());
    IDeviceContext*   pCtx           = RenderDelegate->GetDeviceContext();

    // Note that HnRenderShadowsTask may be disabled, so we need to transition the shadow map state here
    if (const HnShadowMapManager* ShadowMapMgr = RenderDelegate->GetShadowMapManager())
    {
        const RenderDeviceInfo& DeviceInfo = RenderDelegate->GetDevice()->GetDeviceInfo();

        StateTransitionDesc Barrier{ShadowMapMgr->GetShadowTexture(), RESOURCE_STATE_UNKNOWN,
                                    DeviceInfo.IsD3DDevice() ? RESOURCE_STATE_SHADER_RESOURCE : RESOURCE_STATE_DEPTH_READ,
                                    STATE_TRANSITION_FLAG_UPDATE_STATE};
        pCtx->TransitionResourceStates(1, &Barrier);
    }

    HnRenderPassState* RP_OpaqueSelected                  = GetRenderPassState(TaskCtx, HnRenderResourceTokens->renderPass_OpaqueSelected);
    HnRenderPassState* RP_OpaqueUnselected_TransparentAll = GetRenderPassState(TaskCtx, HnRenderResourceTokens->renderPass_OpaqueUnselected_TransparentAll);
    HnRenderPassState* RP_TransparentSelected             = GetRenderPassState(TaskCtx, HnRenderResourceTokens->renderPass_TransparentSelected);

    for (HnRenderPassState* RPState : {RP_OpaqueSelected,
                                       RP_OpaqueUnselected_TransparentAll,
                                       RP_TransparentSelected})
    {
        if (RPState != nullptr)
        {
            RPState->SetFrameAttribsSRB(RenderDelegate->GetMainPassFrameAttribsSRB());
        }
    }

    if (RP_OpaqueSelected != nullptr)
    {
        // Commit render pass now to make sure that all render targets are cleared
        RP_OpaqueSelected->Commit(pCtx);
    }
    else
    {
        UNEXPECTED("Opaque Selected render pass state is not set in the task context");
    }
}

} // namespace USD