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backend/drm: relay full HDR metadata

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Simon Ser 2025-06-25 08:54:02 +02:00 • committed by Kenny Levinsen
parent aecb867098
commit 8c7041c4e8
1 changed files with 32 additions and 0 deletions
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32
backend/drm/atomic.c
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@ -190,6 +190,16 @@ static uint8_t convert_cta861_eotf(enum wlr_color_transfer_function tf) {
abort(); // unreachable
}
static uint16_t convert_cta861_color_coord(double v) {
if (v < 0) {
v = 0;
}
if (v > 1) {
v = 1;
}
return (uint16_t)round(v * 50000);
}
static bool create_hdr_output_metadata_blob(struct wlr_drm_backend *drm,
const struct wlr_output_image_description *img_desc, uint32_t *blob_id) {
if (img_desc == NULL) {
@ -202,6 +212,28 @@ static bool create_hdr_output_metadata_blob(struct wlr_drm_backend *drm,
.hdmi_metadata_type1 = {
.eotf = convert_cta861_eotf(img_desc->transfer_function),
.metadata_type = 0,
.display_primaries = {
{
.x = convert_cta861_color_coord(img_desc->mastering_display_primaries.red.x),
.y = convert_cta861_color_coord(img_desc->mastering_display_primaries.red.y),
},
{
.x = convert_cta861_color_coord(img_desc->mastering_display_primaries.green.x),
.y = convert_cta861_color_coord(img_desc->mastering_display_primaries.green.y),
},
{
.x = convert_cta861_color_coord(img_desc->mastering_display_primaries.blue.x),
.y = convert_cta861_color_coord(img_desc->mastering_display_primaries.blue.y),
},
},
.white_point = {
.x = convert_cta861_color_coord(img_desc->mastering_display_primaries.white.x),
.y = convert_cta861_color_coord(img_desc->mastering_display_primaries.white.y),
},
.max_display_mastering_luminance = img_desc->mastering_luminance.max,
.min_display_mastering_luminance = img_desc->mastering_luminance.min * 0.0001,
.max_cll = img_desc->max_cll,
.max_fall = img_desc->max_fall,
},
};
if (drmModeCreatePropertyBlob(drm->fd, &metadata, sizeof(metadata), blob_id) != 0) {