forked from Minki/linux
a5ec8332d4
Pixel blend modes represent the alpha blending equation
selection, describing how the pixels from the current
plane are composited with the background.
Adds a pixel_blend_mode to drm_plane_state and a
blend_mode_property to drm_plane, and related support
functions.
Defines three blend modes in drm_blend.h.
Changes since v1:
- Moves the blending equation into the DOC comment
- Refines the comments of drm_plane_create_blend_mode_property to not
enumerate the #defines, but instead the string values
- Uses fg.* instead of pixel.* and plane_alpha instead of plane.alpha
Changes since v2:
- Refines the comments of drm_plane_create_blend_mode_property:
1) Puts the descriptions (after the ":") on a new line
2) Adds explaining why @supported_modes need PREMUL as default
Changes since v3:
- Refines drm_plane_create_blend_mode_property(). drm_property_add_enum()
can calculate the index itself just fine, so no point in having the
caller pass it in.
- Since the current DRM assumption is that alpha is premultiplied
as default, define DRM_MODE_BLEND_PREMULTI as 0 will be better.
- Refines some comments.
Changes since v4:
- Adds comments in drm_blend.h.
- Removes setting default value in drm_plane_create_blend_mode_property()
as it is already in __drm_atomic_helper_plane_reset().
- Fixes to use state->pixel_blend_mode instead of using
plane->state->pixel_blend_mode in reset function.
- Rebases on drm-misc-next.
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Lowry Li <lowry.li@arm.com>
Signed-off-by: Ayan Kumar Halder <ayan.halder@arm.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/245734/
62 lines
2.4 KiB
C
62 lines
2.4 KiB
C
/*
|
|
* Copyright (c) 2016 Intel Corporation
|
|
*
|
|
* Permission to use, copy, modify, distribute, and sell this software and its
|
|
* documentation for any purpose is hereby granted without fee, provided that
|
|
* the above copyright notice appear in all copies and that both that copyright
|
|
* notice and this permission notice appear in supporting documentation, and
|
|
* that the name of the copyright holders not be used in advertising or
|
|
* publicity pertaining to distribution of the software without specific,
|
|
* written prior permission. The copyright holders make no representations
|
|
* about the suitability of this software for any purpose. It is provided "as
|
|
* is" without express or implied warranty.
|
|
*
|
|
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
|
|
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
|
|
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
|
|
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
|
|
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
|
|
* OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#ifndef __DRM_BLEND_H__
|
|
#define __DRM_BLEND_H__
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/ctype.h>
|
|
#include <drm/drm_mode.h>
|
|
|
|
#define DRM_MODE_BLEND_PREMULTI 0
|
|
#define DRM_MODE_BLEND_COVERAGE 1
|
|
#define DRM_MODE_BLEND_PIXEL_NONE 2
|
|
|
|
struct drm_device;
|
|
struct drm_atomic_state;
|
|
struct drm_plane;
|
|
|
|
static inline bool drm_rotation_90_or_270(unsigned int rotation)
|
|
{
|
|
return rotation & (DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_270);
|
|
}
|
|
|
|
#define DRM_BLEND_ALPHA_OPAQUE 0xffff
|
|
|
|
int drm_plane_create_alpha_property(struct drm_plane *plane);
|
|
int drm_plane_create_rotation_property(struct drm_plane *plane,
|
|
unsigned int rotation,
|
|
unsigned int supported_rotations);
|
|
unsigned int drm_rotation_simplify(unsigned int rotation,
|
|
unsigned int supported_rotations);
|
|
|
|
int drm_plane_create_zpos_property(struct drm_plane *plane,
|
|
unsigned int zpos,
|
|
unsigned int min, unsigned int max);
|
|
int drm_plane_create_zpos_immutable_property(struct drm_plane *plane,
|
|
unsigned int zpos);
|
|
int drm_atomic_normalize_zpos(struct drm_device *dev,
|
|
struct drm_atomic_state *state);
|
|
int drm_plane_create_blend_mode_property(struct drm_plane *plane,
|
|
unsigned int supported_modes);
|
|
#endif
|