libobs: Support color picker with alpha

libobs/obs-properties.c

@@ -438,6 +438,8 @@ static inline size_t get_property_size(enum obs_property_type type)
 		return sizeof(struct frame_rate_data);
 	case OBS_PROPERTY_GROUP:
 		return sizeof(struct group_data);
+	case OBS_PROPERTY_COLOR_ALPHA:
+		return 0;
 	}
 
 	return 0;
@@ -652,6 +654,15 @@ obs_property_t *obs_properties_add_color(obs_properties_t *props,
 	return new_prop(props, name, desc, OBS_PROPERTY_COLOR);
 }
 
+obs_property_t *obs_properties_add_color_alpha(obs_properties_t *props,
+					       const char *name,
+					       const char *desc)
+{
+	if (!props || has_prop(props, name))
+		return NULL;
+	return new_prop(props, name, desc, OBS_PROPERTY_COLOR_ALPHA);
+}
+
 obs_property_t *obs_properties_add_button(obs_properties_t *props,
 					  const char *name, const char *text,
 					  obs_property_clicked_t callback)

libobs/obs-properties.h

@@ -56,6 +56,7 @@ enum obs_property_type {
 	OBS_PROPERTY_EDITABLE_LIST,
 	OBS_PROPERTY_FRAME_RATE,
 	OBS_PROPERTY_GROUP,
+	OBS_PROPERTY_COLOR_ALPHA,
 };
 
 enum obs_combo_format {
@@ -224,6 +225,10 @@ EXPORT obs_property_t *obs_properties_add_color(obs_properties_t *props,
 						const char *name,
 						const char *description);
 
+EXPORT obs_property_t *obs_properties_add_color_alpha(obs_properties_t *props,
+						      const char *name,
+						      const char *description);
+
 EXPORT obs_property_t *
 obs_properties_add_button(obs_properties_t *props, const char *name,
 			  const char *text, obs_property_clicked_t callback);