[Editor] Minor fixes to ImGuiProxy;

Author: LittleCodingFox

.gitignore

@@ -18,3 +18,4 @@ DefaultResources
 dist
 Test Project/Game.csproj
 Test Project/Sandbox.sln
+.idea

Engine/Editor/ImGuiProxy.cs

@@ -86,14 +86,21 @@ public bool Initialize()
         unsafe
         {
             byte *data = null;
-            int fontWidth = 0;
-            int fontHeight = 0;
+            var fontWidth = 0;
+            var fontHeight = 0;
 
             io.Fonts.GetTexDataAsRGBA32(&data, ref fontWidth, ref fontHeight);
 
-            byte[] fontData = new byte[fontWidth * fontHeight * 4];
+            if (data == null)
+            {
+                Log.Error("Failed to load font");
+
+                return false;
+            }
+
+            var fontData = new byte[fontWidth * fontHeight * 4];
 
-            for(int i = 0; i < fontData.Length; i++)
+            for(var i = 0; i < fontData.Length; i++)
             {
                 fontData[i] = data[i];
             }
@@ -315,7 +322,7 @@ private void Render(ImDrawDataPtr drawData)
             var clipPos = drawData.DisplayPos;
             var clipScale = drawData.FramebufferScale;
 
-            for (int i = 0; i < drawData.CmdListsCount; i++)
+            for (var i = 0; i < drawData.CmdListsCount; i++)
             {
                 bgfx.TransientVertexBuffer tvb;
                 bgfx.TransientIndexBuffer tib;
@@ -409,7 +416,7 @@ public static ImTextureID GetImGuiTexture(Texture texture)
             return ImTextureID.Null;
         }
 
-        return new ImTextureID(texture.handle.idx);
+        return new ImTextureID((ulong)texture.handle.idx);
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]