From 0530d3767a6bf58bc5d53e097aa9b4eae471b800 Mon Sep 17 00:00:00 2001
From: Pavel Linkesch <pavel.linkesch@gmail.com>
Date: Tue, 13 Mar 2018 12:36:14 -0700
Subject: [PATCH] close #115 - add resolution info

---
 lib/psd/nodes/root.coffee                |  3 ++-
 lib/psd/resource_section.coffee          |  1 +
 lib/psd/resources/resolution_info.coffee | 26 ++++++++++++++++++++++++
 3 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 lib/psd/resources/resolution_info.coffee

diff --git a/lib/psd/nodes/root.coffee b/lib/psd/nodes/root.coffee
index 92f7bd4..9d5c5e8 100644
--- a/lib/psd/nodes/root.coffee
+++ b/lib/psd/nodes/root.coffee
@@ -7,7 +7,7 @@ module.exports = class Root extends Node
   @layerForPsd: (psd) ->
     layer = {}
     layer[prop] = null for prop in Node.PROPERTIES
-    
+
     layer.top = 0
     layer.left = 0
     layer.right = psd.header.width
@@ -36,6 +36,7 @@ module.exports = class Root extends Node
       height: @height
       resources:
         layerComps: @psd.resources.resource('layerComps')?.export() or []
+        resolutionInfo: @psd.resources.resource('resolutionInfo')?.export() or []
         guides: []
         slices: []
 
diff --git a/lib/psd/resource_section.coffee b/lib/psd/resource_section.coffee
index fb9a5cb..d0c8085 100644
--- a/lib/psd/resource_section.coffee
+++ b/lib/psd/resource_section.coffee
@@ -4,6 +4,7 @@ module.exports = class ResourceSection
   RESOURCES = [
     require('./resources/layer_comps.coffee')
     require('./resources/layer_links.coffee')
+    require('./resources/resolution_info.coffee')
   ]
 
   @factory: (resource) ->
diff --git a/lib/psd/resources/resolution_info.coffee b/lib/psd/resources/resolution_info.coffee
new file mode 100644
index 0000000..a05a719
--- /dev/null
+++ b/lib/psd/resources/resolution_info.coffee
@@ -0,0 +1,26 @@
+module.exports = class ResolutionInfo
+  id: 1005
+  name: 'resolutionInfo'
+
+  constructor: (@resource) ->
+    @file = @resource.file
+
+  parse: ->
+    # 32-bit fixed-point number (16.16)
+    @h_res = @file.readUInt() / 65536
+    @h_res_unit = @file.readUShort()
+    @width_unit = @file.readUShort()
+
+    # 32-bit fixed-point number (16.16)
+    @v_res = @file.readUInt() / 65536
+    @v_res_unit = @file.readUShort()
+    @height_unit = @file.readUShort()
+
+    @resource.data = @
+
+  export: ->
+    data = {}
+    for key in ['h_res', 'h_res_unit', 'width_unit', 'v_res', 'v_res_unit', 'height_unit']
+      data[key] = @[key]
+
+    data
\ No newline at end of file