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<head>
<title>Resources are a main part of any game and ClanLib has a system that
makes resources easy to use</title>
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</head>

<body lang=EN-US style='tab-interval:.5in'>

<div class=Section1>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>Resources are a main part of any game and <span
class=SpellE>ClanLib</span> has a system that makes resources easy to use.<span
style='mso-spacerun:yes'> </span>Lets go back to the code from the first
tutorial and modify it so that it uses resources.</p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>First I will create a file <span class=SpellE>resources.scr</span>
which contains the following</p>

  <p class=MsoNormal><o:p>&nbsp;</o:p></p>
  <hr>
  <pre style='margin-left:.5in'><span class=GramE><span
style='mso-bookmark:OLE_LINK4'><span style='font-family:"Times New Roman"'>section</span></span></span><span
style='mso-bookmark:OLE_LINK4'><span style='font-family:"Times New Roman"'> Surfaces<o:p></o:p></span></span></pre>
  <span
style='mso-bookmark:OLE_LINK4'></span><pre style='margin-left:.5in'><span
style='font-family:"Times New Roman"'>{<o:p></o:p></span></pre>
  <pre
style='margin-left:.5in'><a><span style='font-family:"Times New Roman"'><span
style='mso-tab-count:1'> </span><span style='mso-tab-count:1'> </span></span></a><span
class=SpellE><span style='mso-bookmark:OLE_LINK5'><span style='font-family:
"Times New Roman"'>my_surface</span></span></span><span style='mso-bookmark:
OLE_LINK5'><span style='font-family:"Times New Roman"'> = <span class=SpellE>clanlib.tga</span> (type=surface);<o:p></o:p></span></span></pre>
  <span
style='mso-bookmark:OLE_LINK5'></span><pre style='margin-left:.5in'><span
style='font-family:"Times New Roman"'>}<o:p></o:p></span></pre>
  <p class=MsoNormal><span style='font-size:10.0pt'><o:p>&nbsp;</o:p></span></p>
  <hr>
  <p class=MsoNormal>The Resource Overview provides a good explanation of how to
create a resource file but I will cover some basics here</p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<pre style='margin-left:.5in'><span class=GramE><i style='mso-bidi-font-style:
normal'><span style='font-family:"Times New Roman"'>section</span></i></span><i
style='mso-bidi-font-style:normal'><span style='font-family:"Times New Roman"'> Surfaces<o:p></o:p></span></i></pre>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>You can separate your resources into different sections for
easier organization.<span style='mso-spacerun:yes'> </span>Sections may also
have subsections. </p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<pre style='margin-left:.5in'><span class=SpellE><i style='mso-bidi-font-style:
normal'><span style='font-family:"Times New Roman"'>my_surface</span></i></span><i
style='mso-bidi-font-style:normal'><span style='font-family:"Times New Roman"'> = <span
class=SpellE>clanlib.tga</span> (type=surface);<o:p></o:p></span></i></pre>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><span class=GramE>Creates a resource called <span
class=SpellE>my_surface</span>.</span></p>

  <hr>
  <p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'>//<span
class=SpellE>main.h</span>  has the definition for our main <span
class=SpellE>clanapp</span> class<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'>#include &lt;<span
class=SpellE>ClanLib/core.h</span>&gt;<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'>#include &lt;<span
class=SpellE>ClanLib/application.h</span>&gt;<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'>#include &lt;<span
class=SpellE>ClanLib/display.h</span>&gt;<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'>#include &lt;<span
class=SpellE>ClanLib/gl.h</span>&gt;<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span class=GramE><span style='font-size:10.0pt;color:black'>class</span></span><span
style='font-size:10.0pt;color:black'> <span class=SpellE>SimpleApp</span> :
public <span class=SpellE>CL_ClanApplication</span><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'>{<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span></p>

  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span>virtual <span class=SpellE>int</span> 
    main(<span class=SpellE>int</span>, char**);<o:p></o:p></span></p>

  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'></span></span><span style='font-size:10.0pt;color:black'><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'>};<o:p></o:p></span></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>
  <hr>
  <p class=MsoNormal>&nbsp;</p>
  <p class=MsoNormal>In <span class=SpellE>main.h</span> we will add a line defining 
    a <span class=SpellE>CL_ResourceManager</span> <span class=GramE>whos</span> 
    main job is to load resources and make them available to objects such as a 
    <span
class=SpellE>CL_Surface</span></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

  <hr>
  <p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'>//<span
class=SpellE>main.cpp</span><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'>#include <span
class=SpellE>main.h</span><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span class=SpellE><span class=GramE><span style='font-size:
10.0pt;color:black'>int</span></span></span><span style='font-size:10.0pt;
color:black'> <span class=SpellE>SimpleApp::main</span>(<span class=SpellE>int</span>
<span class=SpellE>argc</span>, char **<span class=SpellE>argv</span>)<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'>{<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span>//we need to set up all the
different pieces<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span><span class=SpellE>CL_SetupCore::<span
class=GramE>init</span></span><span class=GramE>(</span>);<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span><span class=SpellE>CL_SetupApplication::<span
class=GramE>init</span></span><span class=GramE>(</span>);<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span><span class=SpellE>CL_SetupDisplay::<span
class=GramE>init</span></span><span class=GramE>(</span>);<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span><span class=SpellE>CL_SetupGL::<span
class=GramE>init</span></span><span class=GramE>(</span>);<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span></p>

  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p></o:p></span><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span>//We need to create a window so 
    people can see what were doing<o:p></o:p></span></p>
  <p class=MsoNormal style='text-indent:.5in'><span class=SpellE><span style='mso-bookmark:OLE_LINK8'><span style='mso-bookmark:
OLE_LINK6'><span style='font-size:10.0pt;color:black'><span style='mso-tab-count:
1'> </span><span class=SpellE></span></span></span></span><span
style='font-size:10.0pt;color:black'>CL_DisplayWindow</span></span><span
style='font-size:10.0pt;color:black'> <span class=GramE>window(</span>&quot;A 
    Simple <span class=SpellE>ClanLib</span> App&quot;, 640, 480, false, true);<o:p></o:p></span></p>

  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p></o:p></span></p>
  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p></o:p><span
style='mso-tab-count:1'></span></span><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span>//Tell Clanlib that we will be 
    drawing in 2D<o:p></o:p></span></p>
  <span class=SpellE><span
style='font-size:10.0pt;color:black'> <span
style='mso-tab-count:1'></span></span></span> 
  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span><span class=SpellE><span
style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'></span></span></span><span style='font-size:10.0pt;color:black'><o:p>CL_Display::begin_2d();</o:p></span></p>
  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p></o:p></span></p>

  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span><span style='mso-bookmark:OLE_LINK8'><span
class=SpellE><span class=GramE><span style='mso-bookmark:OLE_LINK3'><span style='mso-bookmark:OLE_LINK8'><span style='mso-bookmark:
OLE_LINK6'><span style='font-size:10.0pt;color:black'><span style='mso-tab-count:
1'> </span><span class=SpellE></span></span></span></span><span
style='font-size:10.0pt;color:black'><span class=SpellE>CL_ResourceManager</span> 
    *myResourceManager</span></span></span></span></span><span
style='mso-bookmark:OLE_LINK8'><span style='mso-bookmark:OLE_LINK3'><span
style='font-size:10.0pt;color:black'> = new <span class=SpellE>CL_ResourceManager</span>(<span
class=SpellE>resources.scr</span>, false);<o:p></o:p></span></span></span></p>
  <span style='mso-bookmark:OLE_LINK3'></span>

<p class=MsoNormal><span style='mso-bookmark:OLE_LINK8'><span style='font-size:
10.0pt;color:black'><span style='mso-tab-count:1'> </span><o:p></o:p></span></span></p>

  <p class=MsoNormal><span style='mso-bookmark:OLE_LINK8'><span class=SpellE><span style='mso-bookmark:OLE_LINK6'><span style='mso-bookmark:OLE_LINK8'><span style='mso-bookmark:
OLE_LINK6'><span style='font-size:10.0pt;color:black'><span style='mso-tab-count:
1'> </span><span class=SpellE></span></span></span></span><span
style='font-size:10.0pt;color:black'>//Create a CL_Surface</span></span></span></span><span
style='mso-bookmark:OLE_LINK8'><span style='mso-bookmark:OLE_LINK6'><span
style='font-size:10.0pt;color:black'> that we will load from file.<o:p></o:p></span></span></span></p>

<p class=MsoNormal><span style='mso-bookmark:OLE_LINK8'><span style='mso-bookmark:
OLE_LINK6'><span style='font-size:10.0pt;color:black'><span style='mso-tab-count:
1'> </span><span class=SpellE>CL_Surface</span> *Image = new <span
class=SpellE>CL_<span class=GramE>Surface</span></span><span class=GramE>(</span>Surfaces\<span
class=SpellE>my_Surfaces</span>, <span class=SpellE>myResourceManager</span> );<o:p></o:p></span></span></span></p>

<span style='mso-bookmark:OLE_LINK6'></span><span style='mso-bookmark:OLE_LINK8'></span>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span></p>

  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p></o:p></span><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span>//lets start our while loop and 
    draw on the screen<o:p></o:p></span></p>
  <p class=MsoNormal>&nbsp;</p>
  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:2'> </span>//If escape was hit, we should quit<o:p></o:p></span></p>
  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span><span class=GramE>while(</span>!CL_Keyboard::get_keycode(CL_KEY_ESCAPE))<o:p></o:p></span></p>
  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span>{<o:p></o:p></span></p>
  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:2'> </span>//clear the
screen to black<o:p></o:p></span></p>

  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:2'> </span><span
class=SpellE>CL_Display::</span>clear();<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:2'> </span>//Draw our image
on the screen<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:2'> </span>Image-&gt;<span
class=GramE>draw(</span>150, 150);<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:2'> </span>//flip our
screen so it draws it to the front buffer<o:p></o:p></span></p>

  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:2'> </span><span
class=SpellE><span class=GramE>CL_Display::flip</span></span><span class=GramE>(</span>);<o:p></o:p></span></p>

  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p></o:p></span></p>
  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p></o:p></span><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:2'> </span>//call <span
class=SpellE>keep_alive</span>, the most important call in any loop<o:p></o:p></span></p>
  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:2'> </span><span
class=SpellE>CL_System::keep_<span class=GramE>alive</span></span><span
class=GramE>(</span>);<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span>}<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span><span class=GramE>delete</span>
Image;<o:p></o:p></span></p>

  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span><span class=SpellE><span
style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'></span></span></span><span style='font-size:10.0pt;color:black'><o:p>delete 
    </o:p><span
class=SpellE>myResourceManager</span><o:p>;</o:p></span><span style='font-size:10.0pt;color:black'><o:p></o:p></span></p>
  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p></o:p></span></p>
  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p><span
style='mso-tab-count:1'></span></span><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span>//Tell Clanlib that we are done 
    drawing in 2D<o:p></o:p></span></p>
  <span class=SpellE><span
style='font-size:10.0pt;color:black'> <span
style='mso-tab-count:1'></span></span></span> 
  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span><span class=SpellE><span
style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'></span></span></span><span style='font-size:10.0pt;color:black'><o:p>CL_Display::end_2d();</o:p></span><span style='font-size:10.0pt;color:black'><o:p></o:p></span></p>
  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span><span class=SpellE>CL_SetupCore::<span
class=GramE>deinit</span></span><span class=GramE>(</span>);<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span><span class=SpellE>CL_SetupApplication::<span
class=GramE>deinit</span></span><span class=GramE>(</span>);<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span><span class=SpellE>CL_SetupDisplay::<span
class=GramE>deinit</span></span><span class=GramE>(</span>);<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span><span class=SpellE>CL_SetupGL::<span
class=GramE>deinit</span></span><span class=GramE>(</span>);<o:p></o:p></span></p>

  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p></o:p></span></p>
  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p><span
style='mso-tab-count:1'> </span><span class=SpellE>return 0;</span><o:p></o:p></span></p>
  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p></o:p></span></p>
  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'>}<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span></p>

  <p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p></o:p></span><span class=SpellE>SimpleApp</span> 
    app;</p>

<hr>
  <p class=MsoNormal><o:p>&nbsp;</o:p><i style='mso-bidi-font-style:normal'><span
style='font-size:10.0pt;color:black'><span style='mso-tab-count:1'> 
    </span>//Create and setup our resource manager to look at a file named <span class=SpellE>resources.scr</span><o:p></o:p></span></i></p>

<p class=MsoNormal><i style='mso-bidi-font-style:normal'><span
style='font-size:10.0pt;color:black'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>myResourceManager</span></span> = new <span
class=SpellE>CL_ResourceManager</span>(<span class=SpellE>resources.scr</span>,
false);<o:p></o:p></span></i></p>

<p class=MsoNormal><i style='mso-bidi-font-style:normal'><span
style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span></i></p>

<p class=MsoNormal><span style='color:black'>This creates a <span class=SpellE>CL_ResourceManager</span>
that will load and parse the file <span class=SpellE>resources.scr</span>.<span
style='mso-spacerun:yes'> </span>This file is not a compressed file which is
what the false parameter is.<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:black'>Compressed files hold the resources
and usually have the extension .<span class=SpellE>dat</span> files. Non-compressed
files commonly have .<span class=SpellE>scr</span> extensions.<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:black'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><i style='mso-bidi-font-style:normal'><span
style='font-size:10.0pt;color:black'><span style='mso-tab-count:1'> </span>//Create
a <span class=SpellE>CL_Surface</span> that we will load from file.<o:p></o:p></span></i></p>

<p class=MsoNormal><i style='mso-bidi-font-style:normal'><span
style='font-size:10.0pt;color:black'><span style='mso-tab-count:1'> </span><span
class=SpellE>CL_Surface</span> *Image = new <span class=SpellE>CL_<span
class=GramE>Surface</span></span><span class=GramE>(</span>Surfaces\<span
class=SpellE>my_Surfaces</span>, <span class=SpellE>myResourceManager</span> );<o:p></o:p></span></i></p>

<p class=MsoNormal><i style='mso-bidi-font-style:normal'><span
style='font-size:10.0pt;color:black'><o:p>&nbsp;</o:p></span></i></p>

<p class=MsoNormal><span style='color:black'>We load our surface now from the <span
class=SpellE>CL_ResourceManager</span> instead of directly from disk.<span
style='mso-spacerun:yes'> </span>This specifies that we want to load the <span
class=SpellE>my_Surfaces</span> <span class=SpellE>CL_Surface</span> from the
Surfaces section.<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:black'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:black'>Next we will do Sprites<o:p></o:p></span></p>

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