1c6f875f52
Add a mechanism to create, recycle and destroy window buffers when needed. Typically, this adds a new `xwl_window_buffer` structure which represents a buffer for a given Xwayland window. Each Xwayland window has two different pools of buffers: - The available buffers pool: Those are buffers which where created previously and that have either not been submitted to the compositor or submitted and released. - The unavailable buffers pool: Those are typically the buffers which are being used by the compositor, awaiting a release. Initially, an Xwayland window starts with both pools empty. As soon as a new buffer is needed, it's either created (if there is none available) or picked from the pool of available buffers. Once submitted to the compositor, the buffer is moved to the pool of unavailable buffers. When the corresponding `wl_buffer` is released by the compositor, it is moved back to pool of available buffers again to be reused when needed. To avoid keeping too many buffers around doing nothing, a garbage collection of older, unused buffers also takes care of disposing the buffers being unused for some time. Signed-off-by: Olivier Fourdan <ofourdan@redhat.com> Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
39 lines
1.6 KiB
C
39 lines
1.6 KiB
C
/*
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* Copyright © 2019 Red Hat, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Olivier Fourdan <ofourdan@redhat.com>
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*/
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#include "xwayland.h"
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#ifndef XWAYLAND_WINDOW_BUFFERS_H
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#define XWAYLAND_WINDOW_BUFFERS_H
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void xwl_window_buffers_init(struct xwl_window *xwl_window);
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void xwl_window_buffers_recycle(struct xwl_window *xwl_window);
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void xwl_window_buffers_dispose(struct xwl_window *xwl_window);
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PixmapPtr xwl_window_buffers_get_pixmap(struct xwl_window *xwl_window,
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RegionPtr damage_region);
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#endif /* XWAYLAND_WINDOW_BUFFERS_H */
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