bool CCSchedulerStateMachine::scheduledToDraw() const
{
if (!m_needsRedraw)
return false;
if (drawSuspendedUntilCommit())
return false;
return true;
}
CCSchedulerStateMachine::Action CCSchedulerStateMachine::nextAction() const
{
if (shouldAcquireLayerTexturesForMainThread())
return ACTION_ACQUIRE_LAYER_TEXTURES_FOR_MAIN_THREAD;
switch (m_commitState) {
case COMMIT_STATE_IDLE:
if (m_contextState != CONTEXT_ACTIVE && m_needsForcedRedraw)
return ACTION_DRAW_FORCED;
if (m_contextState != CONTEXT_ACTIVE && m_needsForcedCommit)
return ACTION_BEGIN_FRAME;
if (m_contextState == CONTEXT_LOST)
return ACTION_BEGIN_CONTEXT_RECREATION;
if (m_contextState == CONTEXT_RECREATING)
return ACTION_NONE;
if (shouldDraw())
return m_needsForcedRedraw ? ACTION_DRAW_FORCED : ACTION_DRAW_IF_POSSIBLE;
if (m_needsCommit && ((m_visible && m_canBeginFrame) || m_needsForcedCommit))
return ACTION_BEGIN_FRAME;
return ACTION_NONE;
case COMMIT_STATE_FRAME_IN_PROGRESS:
if (shouldDraw())
return m_needsForcedRedraw ? ACTION_DRAW_FORCED : ACTION_DRAW_IF_POSSIBLE;
return ACTION_NONE;
case COMMIT_STATE_UPDATING_RESOURCES:
if (shouldDraw())
return m_needsForcedRedraw ? ACTION_DRAW_FORCED : ACTION_DRAW_IF_POSSIBLE;
if (!m_updateMoreResourcesPending)
return ACTION_BEGIN_UPDATE_MORE_RESOURCES;
return ACTION_NONE;
case COMMIT_STATE_READY_TO_COMMIT:
return ACTION_COMMIT;
case COMMIT_STATE_WAITING_FOR_FIRST_DRAW:
if (shouldDraw() || m_contextState == CONTEXT_LOST)
return m_needsForcedRedraw ? ACTION_DRAW_FORCED : ACTION_DRAW_IF_POSSIBLE;
// COMMIT_STATE_WAITING_FOR_FIRST_DRAW wants to enforce a draw. If m_canDraw is false
// or textures are not available, proceed to the next step (similar as in COMMIT_STATE_IDLE).
bool canCommit = m_visible || m_needsForcedCommit;
if (m_needsCommit && canCommit && drawSuspendedUntilCommit())
return ACTION_BEGIN_FRAME;
return ACTION_NONE;
}
ASSERT_NOT_REACHED();
return ACTION_NONE;
}
