color-lcms: introduce sRGB stock profile

The stock profile would be used when client or output
do not provide any profile or unaware of color management.

Signed-off-by: Vitaly Prosyak <vitaly.prosyak@amd.com>

libweston/color-lcms/color-lcms.c

@@ -165,6 +165,10 @@ cmlcms_init(struct weston_color_manager *cm_base)
 
 	cmsSetLogErrorHandlerTHR(cm->lcms_ctx, lcms_error_logger);
 
+	if (!cmlcms_create_stock_profile(cm)) {
+		weston_log("color-lcms: error: cmlcms_create_stock_profile failed\n");
+		return false;
+	}
 	weston_log("LittleCMS %d initialized.\n", cmsGetEncodedCMMversion());
 
 	return true;
@@ -175,6 +179,8 @@ cmlcms_destroy(struct weston_color_manager *cm_base)
 {
 	struct weston_color_manager_lcms *cm = get_cmlcms(cm_base);
 
+	if (cm->sRGB_profile)
+		cmlcms_color_profile_destroy(cm->sRGB_profile);
 	assert(wl_list_empty(&cm->color_transform_list));
 	assert(wl_list_empty(&cm->color_profile_list));
 

libweston/color-lcms/color-lcms.h

@@ -39,6 +39,7 @@ struct weston_color_manager_lcms {
 
 	struct wl_list color_transform_list; /* cmlcms_color_transform::link */
 	struct wl_list color_profile_list; /* cmlcms_color_profile::link */
+	struct cmlcms_color_profile *sRGB_profile; /* stock profile */
 };
 
 static inline struct weston_color_manager_lcms *
@@ -186,4 +187,10 @@ ref_cprof(struct cmlcms_color_profile *cprof);
 void
 unref_cprof(struct cmlcms_color_profile *cprof);
 
+bool
+cmlcms_create_stock_profile(struct weston_color_manager_lcms *cm);
+
+void
+cmlcms_color_profile_destroy(struct cmlcms_color_profile *cprof);
+
 #endif /* WESTON_COLOR_LCMS_H */

libweston/color-lcms/color-profile.c

@@ -102,7 +102,7 @@ cmlcms_color_profile_create(struct weston_color_manager_lcms *cm,
 	return cprof;
 }
 
-static void
+void
 cmlcms_color_profile_destroy(struct cmlcms_color_profile *cprof)
 {
 	wl_list_remove(&cprof->link);
@@ -153,6 +153,44 @@ make_icc_file_description(cmsHPROFILE profile,
 	return desc;
 }
 
+/**
+ *
+ * Build stock profile which available for clients unaware of color management
+ */
+bool
+cmlcms_create_stock_profile(struct weston_color_manager_lcms *cm)
+{
+	cmsHPROFILE profile;
+	struct cmlcms_md5_sum md5sum;
+	char *desc = NULL;
+
+	profile = cmsCreate_sRGBProfileTHR(cm->lcms_ctx);
+	if (!profile) {
+		weston_log("color-lcms: error: cmsCreate_sRGBProfileTHR failed\n");
+		return false;
+	}
+	if (!cmsMD5computeID(profile)) {
+		weston_log("Failed to compute MD5 for ICC profile\n");
+		goto err_close;
+	}
+
+	cmsGetHeaderProfileID(profile, md5sum.bytes);
+	desc = make_icc_file_description(profile, &md5sum, "sRGB stock");
+	if (!desc)
+		goto err_close;
+
+	cm->sRGB_profile = cmlcms_color_profile_create(cm, profile, desc, NULL);
+	if (!cm->sRGB_profile)
+		goto err_close;
+
+	return true;
+
+err_close:
+	free(desc);
+	cmsCloseProfile(profile);
+	return false;
+}
+
 bool
 cmlcms_get_color_profile_from_icc(struct weston_color_manager *cm_base,
 				  const void *icc_data,