Add UI scale factor and color properties

3 files changed, 52 insertions, 0 deletions

diff --git a/lv2/ui/lv2-ui.doap.ttl b/lv2/ui/lv2-ui.doap.ttl
index ace0a0f..b83a730 100644
--- a/lv2/ui/lv2-ui.doap.ttl
+++ b/lv2/ui/lv2-ui.doap.ttl
@@ -18,6 +18,8 @@
 		dcs:changeset [
 			dcs:item [
 				rdfs:label "Add ui:requestValue feature."
+			] , [
+				rdfs:label "Add ui:scaleFactor, ui:foregroundColor, and ui:backgroundColor properties."
 			]
 		]
 	] , [
diff --git a/lv2/ui/ui.h b/lv2/ui/ui.h
index aba3d5a..ce6aa4f 100644
--- a/lv2/ui/ui.h
+++ b/lv2/ui/ui.h
@@ -69,6 +69,9 @@
 #define LV2_UI__ui               LV2_UI_PREFIX "ui"                ///< http://lv2plug.in/ns/extensions/ui#ui
 #define LV2_UI__updateRate       LV2_UI_PREFIX "updateRate"        ///< http://lv2plug.in/ns/extensions/ui#updateRate
 #define LV2_UI__windowTitle      LV2_UI_PREFIX "windowTitle"       ///< http://lv2plug.in/ns/extensions/ui#windowTitle
+#define LV2_UI__scaleFactor      LV2_UI_PREFIX "scaleFactor"       ///< http://lv2plug.in/ns/extensions/ui#scaleFactor
+#define LV2_UI__foregroundColor  LV2_UI_PREFIX "foregroundColor"   ///< http://lv2plug.in/ns/extensions/ui#foregroundColor
+#define LV2_UI__backgroundColor  LV2_UI_PREFIX "backgroundColor"   ///< http://lv2plug.in/ns/extensions/ui#backgroundColor
 
 /**
    The index returned by LV2UI_Port_Map::port_index() for unknown ports.
diff --git a/lv2/ui/ui.ttl b/lv2/ui/ui.ttl
index 8641471..fcd2f67 100644
--- a/lv2/ui/ui.ttl
+++ b/lv2/ui/ui.ttl
@@ -1,4 +1,5 @@
 @prefix lv2: <http://lv2plug.in/ns/lv2core#> .
+@prefix opts: <http://lv2plug.in/ns/ext/options#> .
 @prefix owl: <http://www.w3.org/2002/07/owl#> .
 @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
 @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@@ -179,6 +180,52 @@ The data pointer for the LV2_Feature for this feature should always be set
 to NULL.</p>
 """ .
 
+ui:scaleFactor
+	a rdf:Property ,
+		owl:DatatypeProperty ,
+		opts:Option ;
+	rdfs:range xsd:float ;
+	rdfs:label "UI scale factor" ;
+	lv2:documentation """
+<p>HiDPI (High Dots Per Inch) displays have a high resolution on a relatively
+small form factor.  Many systems use a scale factor to compensate for this, so
+for example, a scale factor of 2 means things are drawn twice as large as
+normal.</p>
+
+<p>Hosts can pass this as an option to UIs to communicate this information, so
+that the UI can draw at an appropriate scale.</p>
+""" .
+
+ui:backgroundColor
+	a rdf:Property ,
+		owl:DatatypeProperty ,
+		opts:Option ;
+	rdfs:label "Background color" ;
+	lv2:documentation """
+<p>The background color of the host's UI.  The host can pass this as an option
+so that UIs can integrate nicely with the host window around it.</p>
+
+<p>Hosts should pass this as an option to UIs with an integer RGBA32 color
+value.  If the value is a 32-bit integer, it is guaranteed to be in RGBA32
+format, but the UI must check the value type and not assume this, to allow for
+other types of color in the future.</p>
+""" .
+
+ui:foregroundColor
+	a rdf:Property ,
+		owl:DatatypeProperty ,
+		opts:Option ;
+	rdfs:label "Foreground color" ;
+	lv2:documentation """
+<p>The foreground color of the host's UI.  The host can pass this as an option
+so that UIs can integrate nicely with the host window around it.</p>
+
+<p>Hosts should pass this as an option to UIs with an integer RGBA32 color
+value.  If the value is a 32-bit integer, it is guaranteed to be in RGBA32
+format, but the UI must check the value type and not assume this, to allow for
+other types of color in the future.</p>
+""" .
+
 ui:parent
 	a lv2:Feature ;
 	lv2:documentation """