From 25ae5485da2236e2ace73b7e9d27fb41c3f62ead Mon Sep 17 00:00:00 2001
From: Philipp von Weitershausen <philikon@fb.com>
Date: Tue, 21 Apr 2015 09:18:51 -0700
Subject: [PATCH] [ReactNative][MAdMan] helper for GraphQL-safe pixel size
 calculation

---
 Libraries/Utilities/PixelRatio.js | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/Libraries/Utilities/PixelRatio.js b/Libraries/Utilities/PixelRatio.js
index f8e23398a..e6c96b7fa 100644
--- a/Libraries/Utilities/PixelRatio.js
+++ b/Libraries/Utilities/PixelRatio.js
@@ -36,8 +36,8 @@ var Dimensions = require('Dimensions');
  *
  * ```
  * var image = getImage({
- *   width: 200 * PixelRatio.get(),
- *   height: 100 * PixelRatio.get()
+ *   width: PixelRatio.getPixelSizeForLayoutSize(200),
+ *   height: PixelRatio.getPixelSizeForLayoutSize(100),
  * });
  * <Image source={image} style={{width: 200, height: 100}} />
  * ```
@@ -52,10 +52,21 @@ class PixelRatio {
    *     - iPhone 6
    *   - PixelRatio.get() === 3
    *     - iPhone 6 plus
+   *   - PixelRatio.get() === 3.5
+   *     - Nexus 6
    */
   static get(): number {
     return Dimensions.get('window').scale;
   }
+
+  /**
+   * Converts a layout size (dp) to pixel size (px).
+   *
+   * Guaranteed to return an integer number.
+   */
+  static getPixelSizeForLayoutSize(layoutSize: number): number {
+    return Math.round(layoutSize * PixelRatio.get());
+  }
 }
 
 // No-op for iOS, but used on the web. Should not be documented.