Question about Texture Atlases

15 Jan 2014, 11:46

Something I was wondering but haven't gotten to yet: Let's say you have a large atlas with your icons, for your project. In your example of the running alladin character, you create a resource dictionary defining an image for each icon.

<!-- Created using Noesis XAML exporter for TexturePacker (http://www.texturepacker.com) -->
<ResourceDictionary
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <ImageBrush x:Key="aladin01" ImageSource="aladin-atlas.png" Viewbox="145,58,33,54" ViewboxUnits="Absolute"
      Stretch="Fill"/>
    <ImageBrush x:Key="aladin02" ImageSource="aladin-atlas.png" Viewbox="180,58,30,54" ViewboxUnits="Absolute"
      Stretch="Fill"/>
    <ImageBrush x:Key="aladin03" ImageSource="aladin-atlas.png" Viewbox="73,61,27,57" ViewboxUnits="Absolute"
      Stretch="Fill"/>
    <ImageBrush x:Key="aladin04" ImageSource="aladin-atlas.png" Viewbox="39,2,33,57" ViewboxUnits="Absolute"
      Stretch="Fill"/>
    <ImageBrush x:Key="aladin05" ImageSource="aladin-atlas.png" Viewbox="112,2,38,54" ViewboxUnits="Absolute"
      Stretch="Fill"/>
    <ImageBrush x:Key="aladin06" ImageSource="aladin-atlas.png" Viewbox="74,2,36,56" ViewboxUnits="Absolute"
      Stretch="Fill"/>
    <ImageBrush x:Key="aladin07" ImageSource="aladin-atlas.png" Viewbox="152,2,31,54" ViewboxUnits="Absolute"
      Stretch="Fill"/>
    <ImageBrush x:Key="aladin08" ImageSource="aladin-atlas.png" Viewbox="185,2,27,54" ViewboxUnits="Absolute"
      Stretch="Fill"/>
    <ImageBrush x:Key="aladin09" ImageSource="aladin-atlas.png" Viewbox="41,61,30,57" ViewboxUnits="Absolute"
      Stretch="Fill"/>
    <ImageBrush x:Key="aladin10" ImageSource="aladin-atlas.png" Viewbox="2,2,35,58" ViewboxUnits="Absolute"
      Stretch="Fill"/>
    <ImageBrush x:Key="aladin11" ImageSource="aladin-atlas.png" Viewbox="102,60,41,55" ViewboxUnits="Absolute"
      Stretch="Fill"/>
    <ImageBrush x:Key="aladin12" ImageSource="aladin-atlas.png" Viewbox="2,62,37,57" ViewboxUnits="Absolute"
      Stretch="Fill"/>

</ResourceDictionary>

For something like a static set of icons (not a running character where the image changes very quickly), would you recommend instead to just create the imagebrush at runtime, when you show the icon?

In my case, I have a quickbar of skills you choose in mind. I would only be showing a small amount at one time, but the total I have to choose from may be in the hundreds.

15 Jan 2014, 15:00

Unless you have memory problems by defining all the ImageBrushes in one or more ResourceDictionaries, this is the recommended way of using an image atlas.

The alternative would require you to define, in a ResourceDictionary, a ImageSource for each image atlas texture, and use it to create in runtime the ImageBrushes and setting the ImageSource and Viewbox properties manually.

Question about Texture Atlases

Question about Texture Atlases

Re: Question about Texture Atlases

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