From 6d474717673530d6e4160fa251bbf226d301f1f1 Mon Sep 17 00:00:00 2001
From: Ivo van Dongen <info@ivovandongen.nl>
Date: Wed, 30 Aug 2017 17:22:28 +0300
Subject: [PATCH] [ios] extend ui image additions with init from premultiplied
 image

---
 platform/ios/src/UIImage+MGLAdditions.h  |  2 ++
 platform/ios/src/UIImage+MGLAdditions.mm | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/platform/ios/src/UIImage+MGLAdditions.h b/platform/ios/src/UIImage+MGLAdditions.h
index 6e15e07cb..3c179d632 100644
--- a/platform/ios/src/UIImage+MGLAdditions.h
+++ b/platform/ios/src/UIImage+MGLAdditions.h
@@ -8,6 +8,8 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (nullable instancetype)initWithMGLStyleImage:(const mbgl::style::Image *)styleImage;
 
+- (nullable instancetype)initWithMGLPremultipliedImage:(const mbgl::PremultipliedImage&&)mbglImage;
+
 - (std::unique_ptr<mbgl::style::Image>)mgl_styleImageWithIdentifier:(NSString *)identifier;
 
 - (mbgl::PremultipliedImage)mgl_premultipliedImage;
diff --git a/platform/ios/src/UIImage+MGLAdditions.mm b/platform/ios/src/UIImage+MGLAdditions.mm
index 5e28d1819..7cf1ed9bc 100644
--- a/platform/ios/src/UIImage+MGLAdditions.mm
+++ b/platform/ios/src/UIImage+MGLAdditions.mm
@@ -22,6 +22,19 @@
     return self;
 }
 
+- (nullable instancetype)initWithMGLPremultipliedImage:(const mbgl::PremultipliedImage&&)mbglImage
+{
+    CGImageRef image = CGImageFromMGLPremultipliedImage(mbglImage.clone());
+    if (!image) {
+        return nil;
+    }
+
+    self = [self initWithCGImage:image scale:1.0 orientation:UIImageOrientationUp];
+    
+    CGImageRelease(image);
+    return self;
+}
+
 - (std::unique_ptr<mbgl::style::Image>)mgl_styleImageWithIdentifier:(NSString *)identifier {
     BOOL isTemplate = self.renderingMode == UIImageRenderingModeAlwaysTemplate;
     return std::make_unique<mbgl::style::Image>([identifier UTF8String],