From 2aca058b69b62bf2b46aa068cff8f4972ffd31c7 Mon Sep 17 00:00:00 2001
From: Pekka Paalanen <pekka.paalanen@collabora.com>
Date: Tue, 17 Jun 2025 14:43:04 +0300
Subject: [PATCH] color: add weston_cm_send_parametric_info()

Implementation of sending the protocol info events for an arbitrary
parametric image description.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
---
 libweston/color-lcms/color-profile.c | 11 ++++-----
 libweston/color-management.c         | 34 ++++++++++++++++++++++++++++
 libweston/color-management.h         |  4 ++++
 3 files changed, 42 insertions(+), 7 deletions(-)

diff --git a/libweston/color-lcms/color-profile.c b/libweston/color-lcms/color-profile.c
index e742ebcdb..01c0d032e 100644
--- a/libweston/color-lcms/color-profile.c
+++ b/libweston/color-lcms/color-profile.c
@@ -763,13 +763,10 @@ cmlcms_send_image_desc_info(struct cm_image_desc_info *cm_image_desc_info,
 	if (cprof->type == CMLCMS_PROFILE_TYPE_ICC && cprof != cm->sRGB_profile) {
 		return cmlcms_send_icc_info(cm_image_desc_info, cprof);
 	} else {
-		/* TODO: we still don't support parametric color profiles that
-		 * are not the stock one. This should change when we start
-		 * advertising parametric image description support in our
-		 * color-management protocol implementation. */
-		if (cprof != cm->sRGB_profile)
-			weston_assert_not_reached(compositor, "we don't support parametric " \
-						  "cprof's that are not the stock sRGB one");
+		if (cprof != cm->sRGB_profile) {
+			weston_cm_send_parametric_info(cm_image_desc_info, cprof->params);
+			return true;
+		}
 
 		/* Stock sRGB color profile. TODO: when we add support for
 		 * parametric color profiles, the stock sRGB will be crafted
diff --git a/libweston/color-management.c b/libweston/color-management.c
index 79572cc1d..8996401ea 100644
--- a/libweston/color-management.c
+++ b/libweston/color-management.c
@@ -280,6 +280,40 @@ weston_cm_send_target_luminances(struct cm_image_desc_info *cm_image_desc_info,
 							   max_lum);
 }
 
+/**
+ * Send complete parametric image description information to the client.
+ */
+WL_EXPORT void
+weston_cm_send_parametric_info(struct cm_image_desc_info *cm_image_desc_info,
+			       const struct weston_color_profile_params *par)
+{
+	if (par->primaries_info)
+		weston_cm_send_primaries_named(cm_image_desc_info, par->primaries_info);
+	weston_cm_send_primaries(cm_image_desc_info, &par->primaries);
+	weston_cm_send_target_primaries(cm_image_desc_info, &par->target_primaries);
+
+	weston_cm_send_tf(cm_image_desc_info, &par->tf);
+
+	weston_cm_send_luminances(cm_image_desc_info, par->min_luminance,
+				  par->max_luminance, par->reference_white_luminance);
+
+	if (par->target_min_luminance >= 0.0f && par->target_max_luminance >= 0.0f) {
+		weston_cm_send_target_luminances(cm_image_desc_info,
+						 par->target_min_luminance,
+						 par->target_max_luminance);
+	}
+
+	if (par->maxCLL > 0.0f) {
+		wp_image_description_info_v1_send_target_max_cll(cm_image_desc_info->owner,
+								 par->maxCLL);
+	}
+
+	if (par->maxFALL > 0.0f) {
+		wp_image_description_info_v1_send_target_max_fall(cm_image_desc_info->owner,
+								  par->maxFALL);
+	}
+}
+
 /**
  * Destroy an image description info object.
  */
diff --git a/libweston/color-management.h b/libweston/color-management.h
index 0086e1207..d83ed39c4 100644
--- a/libweston/color-management.h
+++ b/libweston/color-management.h
@@ -67,4 +67,8 @@ void
 weston_cm_send_target_luminances(struct cm_image_desc_info *cm_image_desc_info,
                                  float min_lum, float max_lum);
 
+void
+weston_cm_send_parametric_info(struct cm_image_desc_info *cm_image_desc_info,
+			       const struct weston_color_profile_params *par);
+
 #endif /* WESTON_COLOR_MANAGEMENT_H */