26ded94aa0
Add a flag to pixman-renderer for initializing the output with a shadow framebuffer. All backends were getting the shadow implcitly, so all backends are modified to ask for the shadow explicitly. Using a shadow buffer is usually beneficial, because read-modify-write cycles (blending) into a scanout-capable buffer may be very slow. The scanout framebuffer may also have reduced color depth, making blending and read-back produce inferior results. In some use cases though the shadow buffer might be just an extra copy hurting more than it helps. Whether it helps or hurts depends on the platform and the workload. Therefore let the backends control whether pixman-renderer uses a shadow buffer for an output or not. Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk> Signed-off-by: Fabien Lahoudere <fabien.lahoudere@collabora.com> Reviewed-by: Ian Ray <ian.ray@ge.com>
50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/*
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* Copyright © 2013 Vasily Khoruzhick <anarsoul@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "config.h"
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#include "compositor.h"
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int
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pixman_renderer_init(struct weston_compositor *ec);
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enum pixman_renderer_output_flags {
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PIXMAN_RENDERER_OUTPUT_USE_SHADOW = (1 << 0),
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};
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int
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pixman_renderer_output_create(struct weston_output *output, uint32_t flags);
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void
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pixman_renderer_output_set_buffer(struct weston_output *output,
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pixman_image_t *buffer);
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void
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pixman_renderer_output_set_hw_extra_damage(struct weston_output *output,
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pixman_region32_t *extra_damage);
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void
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pixman_renderer_output_destroy(struct weston_output *output);
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