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<head>
<title>This is meant as a basic tutorial that will teach you how to do some of
the more basic things in ClanLib</title>
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<body lang=EN-US style='tab-interval:.5in'>
<div class=Section1>
<p class=MsoNormal align=center style='text-align:center'><b style='mso-bidi-font-weight:
normal'><span style='font-size:14.0pt'><o:p> </o:p></span></b></p>
<p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal>This is meant as a basic tutorial that will teach you how to
do some of the more basic things in <span class=SpellE>ClanLib</span>.<span
style='mso-spacerun:yes'> </span>This document refers currently to the 0.8
series.<span style='mso-spacerun:yes'> </span>We will start off by explaining
the main include statements in <span class=SpellE>ClanLib</span>.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<hr>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='color:#3366FF'><<span class=SpellE>ClanLib/core.h</span>>
</span><span style='color:black'>- This must be included when using any part of
<span class=SpellE>clanlib</span><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#3366FF'><<span class=SpellE>ClanLib/application.h</span>>
</span><span style='color:black'>- <o:p>Needed for the crossplatform application
framework</o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#3366FF'><<span class=SpellE>ClanLib/display.h</span>>
</span><span style='color:black'>- Needed for any graphics use in <span
class=SpellE>ClanLib</span><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#3366FF'><<span class=SpellE>ClanLib/GL.h</span>>
</span><span style='color:black'>- Used for OpenGL, currently the only hardware
support (DX7 and DX8 are planned)<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<hr>
<p class=MsoNormal><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'>Im going to approach this as if
we are going to have 2 files, <span class=SpellE><b style='mso-bidi-font-weight:
normal'>main.h</b></span> and <span class=SpellE><b style='mso-bidi-font-weight:
normal'>main.cpp</b></span><b style='mso-bidi-font-weight:normal'>.<span
style='mso-spacerun:yes'> </span></b>Lets first set up our header file with
our main class<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></p>
<hr>
<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> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'>#include <<span
class=SpellE>ClanLib/core.h</span>><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'>#include <<span
class=SpellE>ClanLib/application.h</span>><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'>#include <<span
class=SpellE>ClanLib/display.h</span>><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'>#include <<span
class=SpellE>ClanLib/gl.h</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 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> </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><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></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p> </o:p></span></p>
<hr>
<p class=MsoNormal><span style='color:black'>Above we created a class named
<span
class=SpellE>SimpleApp</span> that inherits from <span class=SpellE>CL_ClanApplication</span>.<span
style='mso-spacerun:yes'> </span>Within that class we have a function <span
class=GramE><b style='mso-bidi-font-weight:normal'>main(</b></span><span
class=SpellE><b style='mso-bidi-font-weight:normal'>int</b></span><b
style='mso-bidi-font-weight:normal'>, char**)</b> which will be the starting function
for your application.<span style='mso-spacerun:yes'> </span>Ok so lets go
on to <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> </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
class=SpellE>main.cpp</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'>#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> </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> </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> </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><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>
<span class=SpellE><span
style='font-size:10.0pt;color:black'> <span
style='mso-tab-count:1'></span>CL_DisplayWindow</span></span><span
style='font-size:10.0pt;color:black'> <span class=GramE>window(</span>"A
Simple <span class=SpellE>ClanLib</span> App", 640, 480, false, true);<o:p></o:p></span>
<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><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> </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><br>
</o:p></span></p>
<p class=MsoNormal><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></p>
<p class=MsoNormal><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>"<span
class=SpellE>clanlib.tga</span>");<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'><o:p></o:p></span></p>
<p class=MsoNormal><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><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: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> </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:1'> </span><span style='mso-tab-count:1'>
</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> </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-><span
class=GramE>draw(</span>150, 150);<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></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'><span
style='mso-tab-count:1'> </span><span style='mso-tab-count:1'>
</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:1'> </span><span style='mso-tab-count:1'> </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> </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></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'><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> </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><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>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> </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'><o:p> </o:p></span></p>
<p class=MsoNormal><span class=SpellE>SimpleApp</span> app;</p>
<p class=MsoNormal><o:p> </o:p></p>
<hr>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>So lets go over the separate <span class=SpellE>ClanLib</span>
related pieces of app</p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span><i style='mso-bidi-font-style:
normal'>//we need to set up all the different pieces<o:p></o:p></i></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><span
class=SpellE>CL_SetupCore::<span class=GramE>init</span></span><span
class=GramE>(</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>CL_SetupApplication::<span class=GramE>init</span></span><span
class=GramE>(</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>CL_SetupDisplay::<span class=GramE>init</span></span><span
class=GramE>(</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>CL_SetupGL::<span class=GramE>init</span></span><span class=GramE>(</span>);<o:p></o:p></span></i></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>First thing we need to do is initialize the different <span
class=SpellE>ClanLib</span> subsystems we will use.<span
style='mso-spacerun:yes'> </span>Basic rule of thumb is for every <span
class=SpellE>ClanLib</span> include you will need to do a <span class=SpellE>CL_<span
class=GramE>Setup</span></span><span class=GramE>(</span>subsystem)::init().</p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span><i style='mso-bidi-font-style:
normal'>//We need to create a window so people can see what were doing<o:p></o:p></i></span></p>
<p class=MsoNormal style='text-indent:.5in'><span class=SpellE><i
style='mso-bidi-font-style:normal'><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span><i style='mso-bidi-font-style:
normal'></i>CL_DisplayWindow</span></i></span><i
style='mso-bidi-font-style:normal'><span style='font-size:10.0pt;color:black'>
<span
class=GramE>window(</span>"A Simple <span class=SpellE>ClanLib</span> App",
640, 480, false, true);<o:p></o:p></span></i></p>
<p><span class=SpellE>CL_DisplayWindow</span> creates a window named A Simple
<span class=SpellE>ClanLib</span> App of specified size (640 x 480 in our
case) which is not <span class=SpellE>fullscreen</span> and is resizable.<span style='mso-spacerun:yes'>
</span><span class=SpellE>CL_DisplayWindow</span> will be the main window
of your app.</p>
<p class=MsoNormal><o:p></o:p><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'><i></i></span></span><i><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></i></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;color:black'><o:p> </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></i></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;color:black'><o:p></o:p></span></i><span style='font-size:10.0pt;color:black'><o:p></o:p></span></p>
<p class=MsoNormal>Tell Clanlib that we will be drawing in 2D at this point</p>
<p class=MsoNormal><o:p></o:p><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><i style='mso-bidi-font-style:
normal'>//Create a <span class=SpellE>CL_Surface</span> that we will load from
file.<o:p></o:p></i></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><span
class=SpellE>CL_Surface</span> *Image = new <span class=SpellE>CL_<span
class=GramE>Surface</span></span><span class=GramE>(</span>"<span class=SpellE>clanlib.tga</span>");<o:p></o:p></span></i></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span class=SpellE>CL_Surface</span> is the main class used
for loading graphics file and displaying them on screen.<span
style='mso-spacerun:yes'> </span><span class=SpellE>CL_Surfaces</span> are
created either from resources or a <span class=SpellE>CL_Provider</span> class.<span
style='mso-spacerun:yes'> </span>The following Providers are available at this
time:</p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='text-indent:.5in'><span class=SpellE>CL_PCXProvider</span></p>
<p class=MsoNormal style='text-indent:.5in'><span class=SpellE>CL_PNGProvider</span></p>
<p class=MsoNormal style='text-indent:.5in'><span class=SpellE>CL_TGAProvider</span></p>
<p class=MsoNormal style='text-indent:.5in'><span class=SpellE>CL_JPEGProvider</span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Feel free to create more.</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><i><span
style='mso-tab-count:1'></span></i></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'><i><span
style='mso-tab-count:1'> </span><o:p>while (!CL_Keyboard::get_keycode(CL_KEY_ESCAPE))</o:p></i><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><span style='font-size:10.0pt;color:black'><o:p></o:p></span>Checks
to see if the user pressed escape...</p>
<p class=MsoNormal><o:p></o:p><o:p> </o:p><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><i style='mso-bidi-font-style:
normal'>//clear the screen to black<o:p></o:p></i></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>CL_Display::clear();<o:p></o:p></span></i></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Clears the <span class=SpellE>backbuffer</span> to black</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><i style='mso-bidi-font-style:
normal'>//Draw our image on the screen<o:p></o:p></i></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>Image-><span
class=GramE>draw(</span>150, 150);<o:p></o:p></span></i></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Draws our <span class=SpellE>tga</span> file to x<span
class=GramE>:150</span>, y:150 starting from the upper left corner</p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span><i style='mso-bidi-font-style:
normal'>//flip our screen so it draws it to the front buffer<o:p></o:p></i></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><span
class=SpellE><span class=GramE>CL_Display::.flip</span></span><span class=GramE>(</span>);<o:p></o:p></span></i></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Draws the image on our screen by moving it from the <span
class=SpellE>backbuffer</span> to the front buffer</p>
<p class=MsoNormal><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'><i><span
style='mso-tab-count:1'></span></i></span><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'> </span><i style='mso-bidi-font-style:
normal'>//call <span class=SpellE>keep_alive</span>, the most important call in
any loop<o:p></o:p></i></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><span
class=SpellE>CL_System::keep_<span class=GramE>alive</span></span><span
class=GramE>(</span>);<o:p></o:p></span></i></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Does housecleaning and makes sure our app doesnt die</p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'><span
style='mso-tab-count:1'><i></i></span></span><i><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></i></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;color:black'><o:p> </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></i></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;color:black'><o:p></o:p></span></i><span style='font-size:10.0pt;color:black'><o:p></o:p></span></p>
<p class=MsoNormal>Tell Clanlib that we are done drawing in 2D at this point</p>
<p class=MsoNormal><o:p></o:p><span style='font-size:10.0pt;color:black'><o:p></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><span
class=SpellE>CL_SetupCore::<span class=GramE>deinit</span></span><span
class=GramE>(</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>CL_SetupApplication::<span class=GramE>deinit</span></span><span
class=GramE>(</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>CL_SetupDisplay::<span class=GramE>deinit</span></span><span
class=GramE>(</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>CL_SetupGL::<span class=GramE>deinit</span></span><span
class=GramE>(</span>);<o:p></o:p></span></i></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span class=GramE>And shutdown your subsystems.</span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span class=SpellE><i style='mso-bidi-font-style:normal'><span
style='font-size:10.0pt'>SimpleApp</span></i></span><i style='mso-bidi-font-style:
normal'><span style='font-size:10.0pt'> app;<o:p></o:p></span></i></p>
<p class=MsoNormal><i style='mso-bidi-font-style:normal'><span
style='font-size:10.0pt'><o:p> </o:p></span></i></p>
<p class=MsoNormal>This call makes an instance of our class.</p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thats it.<span style='mso-spacerun:yes'> </span>Next is resources<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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