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* Copyright © 2014 Canonical Ltd.
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 3,
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* as published by the Free Software Foundation.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* Authored by: Christopher James Halse Rogers <christopher.halse.rogers@canonical.com>
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#ifndef MIR_COMPOSITOR_FRAME_DROPPING_POLICY_H_
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#define MIR_COMPOSITOR_FRAME_DROPPING_POLICY_H_
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* \brief Policy to determine when to drop a frame from a client
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* The FrameDroppingPolicy objects are constructed from a
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* \ref FrameDroppingPolicyFactory
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* The frame dropping mechanism is provided as the
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* \a drop_frames argument of \ref FrameDroppingPolicyFactory::create_policy
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* The policy may decide to drop a frame any time that there is an outstanding
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* swap - namely, when there have been more calls to \ref swap_now_blocking
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* than to \ref swap_unblocked
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class FrameDroppingPolicy
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virtual ~FrameDroppingPolicy() = default;
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FrameDroppingPolicy(FrameDroppingPolicy const&) = delete;
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FrameDroppingPolicy& operator=(FrameDroppingPolicy const&) = delete;
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* \brief Notify that a swap is now blocking
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virtual void swap_now_blocking() = 0;
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* \brief Notify that previous swap is no longer blocking
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virtual void swap_unblocked() = 0;
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* \note FrameDroppingPolicies should not be constructed directly;
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* use a \ref FrameDroppingPolicyFactory
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FrameDroppingPolicy() = default;
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#endif // MIR_COMPOSITOR_FRAME_DROPPING_POLICY_H_