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backend/drm/atomic: Add support for color representation

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Basic implementation of color representation in drm/atomic: when buffers
are presented for scanout which have color-representation data attached,
set the correct color encoding and range on the plane.  If the plane
does not support color-representation then the commit will fail and the
caller can retry without color-representation.
This commit is contained in:
David Turner 2025-02-13 17:54:57 +00:00
parent dca0703dac
commit abb6eeb422
2 changed files with 63 additions and 1 deletions
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61
backend/drm/atomic.c
View file

@ -1,3 +1,4 @@
#include <assert.h>
#include <drm_fourcc.h>
#include <stdlib.h>
#include <stdio.h>
@ -484,6 +485,62 @@ static void set_plane_props(struct atomic *atom, struct wlr_drm_backend *drm,
atomic_add(atom, id, props->crtc_h, dst_box->height);
}
static void set_color_encoding_and_range(struct atomic *atom,
struct wlr_drm_backend *drm, struct wlr_drm_plane *plane,
enum wlr_color_encoding encoding, enum wlr_color_range range) {
uint32_t id = plane->id;
const struct wlr_drm_plane_props *props = &plane->props;
uint32_t color_encoding;
switch (encoding) {
case WLR_COLOR_ENCODING_NONE:
case WLR_COLOR_ENCODING_BT601:
color_encoding = WLR_DRM_COLOR_YCBCR_BT601;
break;
case WLR_COLOR_ENCODING_BT709:
color_encoding = WLR_DRM_COLOR_YCBCR_BT709;
break;
case WLR_COLOR_ENCODING_BT2020:
color_encoding = WLR_DRM_COLOR_YCBCR_BT2020;
break;
default:
wlr_log(WLR_DEBUG, "Unsupported color encoding %d", encoding);
atom->failed = true;
return;
}
if (props->color_encoding) {
atomic_add(atom, id, props->color_encoding, color_encoding);
} else {
wlr_log(WLR_DEBUG, "Plane %"PRIu32" is missing the COLOR_ENCODING property",
id);
atom->failed = true;
return;
}
uint32_t color_range;
switch (range) {
case WLR_COLOR_RANGE_NONE:
case WLR_COLOR_RANGE_LIMITED:
color_range = WLR_DRM_COLOR_YCBCR_LIMITED_RANGE;
break;
case WLR_COLOR_RANGE_FULL:
color_range = WLR_DRM_COLOR_YCBCR_FULL_RANGE;
break;
default:
assert(0); // Unreachable
}
if (props->color_range) {
atomic_add(atom, id, props->color_range, color_range);
} else {
wlr_log(WLR_DEBUG, "Plane %"PRIu32" is missing the COLOR_RANGE property",
id);
atom->failed = true;
return;
}
}
static bool supports_cursor_hotspots(const struct wlr_drm_plane *plane) {
return plane->props.hotspot_x && plane->props.hotspot_y;
}
@ -550,6 +607,10 @@ static void atomic_connector_add(struct atomic *atom,
set_plane_props(atom, drm, crtc->primary, state->primary_fb, crtc->id,
&state->primary_viewport.dst_box, &state->primary_viewport.src_box);
if (state->base->committed & WLR_OUTPUT_STATE_COLOR_REPRESENTATION) {
set_color_encoding_and_range(atom, drm, crtc->primary,
state->base->color_encoding, state->base->color_range);
}
if (crtc->primary->props.fb_damage_clips != 0) {
atomic_add(atom, crtc->primary->id,
crtc->primary->props.fb_damage_clips, state->fb_damage_clips);