Add support for BT2020 primaries

References: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4976

Author: emersion

Diff for: sway/commands/output/color_profile.c

@@ -90,7 +90,7 @@ struct cmd_results *output_cmd_color_profile(int argc, char **argv) {
 		free(icc_path);
 
 		struct wlr_color_transform *tmp =
-			wlr_color_transform_init_linear_to_icc(data, size);
+			wlr_color_transform_init_linear_to_icc(WLR_COLOR_NAMED_PRIMARIES_SRGB, data, size);
 		if (!tmp) {
 			free(data);
 			return cmd_results_new(CMD_FAILURE,

Diff for: sway/config/output.c

@@ -490,6 +490,15 @@ static void queue_output_config(struct output_config *oc,
 	} else {
 		wlr_output_state_set_render_format(pending, DRM_FORMAT_XRGB8888);
 	}
+
+	if (oc && oc->color_transform == NULL && oc->render_bit_depth == RENDER_BIT_DEPTH_10 &&
+			(wlr_output->supported_primaries & WLR_COLOR_NAMED_PRIMARIES_BT2020) &&
+			server.renderer->features.output_color_transform) {
+		const struct wlr_output_image_description image_desc = {
+			.primaries = WLR_COLOR_NAMED_PRIMARIES_BT2020,
+		};
+		wlr_output_state_set_image_description(pending, &image_desc);
+	}
 }
 
 static bool finalize_output_config(struct output_config *oc, struct sway_output *output) {
@@ -549,6 +558,12 @@ static bool finalize_output_config(struct output_config *oc, struct sway_output
 		output->color_transform = NULL;
 	}
 
+	if (output->color_transform == NULL && oc && oc->render_bit_depth == RENDER_BIT_DEPTH_10 &&
+			(wlr_output->supported_primaries & WLR_COLOR_NAMED_PRIMARIES_BT2020) &&
+			server.renderer->features.output_color_transform) {
+		output->color_transform = wlr_color_transform_init_srgb(WLR_COLOR_NAMED_PRIMARIES_BT2020);
+	}
+
 	output->max_render_time = oc && oc->max_render_time > 0 ? oc->max_render_time : 0;
 	output->allow_tearing = oc && oc->allow_tearing > 0;