2 files changed, 10 insertions, 0 deletions
diff --git a/platform/ios/src/UIColor+MGLAdditions.h b/platform/ios/src/UIColor+MGLAdditions.h
index 19702fa105..86c8daff59 100644
--- a/platform/ios/src/UIColor+MGLAdditions.h
+++ b/platform/ios/src/UIColor+MGLAdditions.h
@@ -7,6 +7,8 @@
 
 - (mbgl::Color)mgl_color;
 
+- (mbgl::Color)mgl_colorForPremultipliedValue;
+
 - (mbgl::style::PropertyValue<mbgl::Color>)mgl_colorPropertyValue;
 
 + (UIColor *)mgl_colorWithColor:(mbgl::Color)color;
diff --git a/platform/ios/src/UIColor+MGLAdditions.mm b/platform/ios/src/UIColor+MGLAdditions.mm
index 68e77f5b10..281ac79ba8 100644
--- a/platform/ios/src/UIColor+MGLAdditions.mm
+++ b/platform/ios/src/UIColor+MGLAdditions.mm
@@ -12,6 +12,14 @@
     return { static_cast<float>(r*a), static_cast<float>(g*a), static_cast<float>(b*a), static_cast<float>(a) };
 }
 
+- (mbgl::Color)mgl_colorForPremultipliedValue
+{
+    CGFloat r, g, b, a;
+    [self getRed:&r green:&g blue:&b alpha:&a];
+    
+    return { static_cast<float>(r), static_cast<float>(g), static_cast<float>(b), static_cast<float>(a) };
+}
+
 - (mbgl::style::PropertyValue<mbgl::Color>)mgl_colorPropertyValue
 {
     mbgl::Color color = self.mgl_color;