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ae0e28265e
Some drivers duplicate the logic to create a property to store a per-plane alpha. This is especially useful if we ever want to support extra protocols for Wayland like: https://lists.freedesktop.org/archives/wayland-devel/2017-August/034741.html Let's create a helper in order to move that to the core. Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Acked-by: Sean Paul <seanpaul@chromium.org> Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com> Reviewed-by: Eric Anholt <eric@anholt.net> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/6e1ce0db78fcfc407e94913c64819e65109d034d.1523432341.git-series.maxime.ripard@bootlin.com
56 lines
2.1 KiB
C
56 lines
2.1 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#ifndef __DRM_BLEND_H__
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#define __DRM_BLEND_H__
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#include <linux/list.h>
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#include <linux/ctype.h>
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#include <drm/drm_mode.h>
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struct drm_device;
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struct drm_atomic_state;
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struct drm_plane;
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static inline bool drm_rotation_90_or_270(unsigned int rotation)
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{
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return rotation & (DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_270);
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}
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#define DRM_BLEND_ALPHA_OPAQUE 0xffff
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int drm_plane_create_alpha_property(struct drm_plane *plane);
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int drm_plane_create_rotation_property(struct drm_plane *plane,
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unsigned int rotation,
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unsigned int supported_rotations);
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unsigned int drm_rotation_simplify(unsigned int rotation,
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unsigned int supported_rotations);
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int drm_plane_create_zpos_property(struct drm_plane *plane,
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unsigned int zpos,
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unsigned int min, unsigned int max);
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int drm_plane_create_zpos_immutable_property(struct drm_plane *plane,
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unsigned int zpos);
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int drm_atomic_normalize_zpos(struct drm_device *dev,
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struct drm_atomic_state *state);
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#endif
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