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		<title>Allegro bitmap is null even when initialized</title>
		<link>http://www.allegro.cc/forums/view/615086</link>
		<description>Allegro.cc Forum Thread</description>
		<webMaster>matthew@allegro.cc (Matthew Leverton)</webMaster>
		<lastBuildDate>Tue, 17 Feb 2015 01:41:08 +0000</lastBuildDate>
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		<description><![CDATA[<div class="mockup v2"><p>Hello folks I&#39;ve come across this problem where my bitmap will not become initialized.<br />I&#39;ve doubled checked my code and I can&#39;t see anything wrong, but it might be because I&#39;m pretty tired atm.</p><p>Here is the relevant code;<br />Main.cpp - This isn&#39;t really relevant code, just another question here, is this a proper way of approaching what I am trying to accomplish? A small 2D game:
</p><div class="source-code snippet"><div class="inner"><pre><span class="p">#include "initialize.h"</span>

<span class="k1">int</span> main<span class="k2">(</span><span class="k2">)</span>
<span class="k2">{</span>
  <span class="k1">const</span> <span class="k1">float</span> FPS <span class="k3">=</span> <span class="n">60</span>.<span class="n">0</span><span class="k2">;</span>
  <span class="k1">const</span> <span class="k1">float</span> frameFPS <span class="k3">=</span> <span class="n">10</span>.<span class="n">0</span><span class="k2">;</span>

  initialize <span class="k3">*</span>init <span class="k3">=</span> <span class="k1">new</span> initialize<span class="k2">(</span><span class="k2">)</span><span class="k2">;</span>
  init-&gt;initSystem<span class="k2">(</span>FPS, frameFPS<span class="k2">)</span><span class="k2">;</span>

  <span class="k1">return</span> <span class="n">0</span><span class="k2">;</span>
<span class="k2">}</span>
</pre></div></div><p>
Inside initialize.cpp:
</p><div class="source-code snippet"><div class="inner"><pre><a href="http://www.allegro.cc/manual/al_install_keyboard"><span class="a">al_install_keyboard</span></a><span class="k2">(</span><span class="k2">)</span><span class="k2">;</span>
  <a href="http://www.allegro.cc/manual/al_init_image_addon"><span class="a">al_init_image_addon</span></a><span class="k2">(</span><span class="k2">)</span><span class="k2">;</span>

  c <span class="k3">=</span> <span class="k1">new</span> Character<span class="k2">(</span><span class="s">"player.png"</span>, <span class="s">"Hero"</span>, <span class="n">40</span>, <span class="n">40</span>, <span class="n">3</span><span class="k2">)</span><span class="k2">;</span>
  std::cout <span class="k3">&lt;</span><span class="k3">&lt;</span> c-&gt;getName<span class="k2">(</span><span class="k2">)</span> <span class="k3">&lt;</span><span class="k3">&lt;</span> <span class="s">": "</span> <span class="k3">&lt;</span><span class="k3">&lt;</span> c-&gt;getHealth<span class="k2">(</span><span class="k2">)</span> <span class="k3">&lt;</span><span class="k3">&lt;</span> <span class="s">" HP."</span> <span class="k3">&lt;</span><span class="k3">&lt;</span> std::endl<span class="k2">;</span>
</pre></div></div><p>
Character.cpp:
</p><div class="source-code snippet"><div class="inner"><pre>Character::Character<span class="k2">(</span>std::string filePath, std::string n, <span class="k1">int</span> var, <span class="k1">int</span> var2, <span class="k1">int</span> speed<span class="k2">)</span>
<span class="k2">{</span>
  image <span class="k3">=</span> <a href="http://www.allegro.cc/manual/al_load_bitmap"><span class="a">al_load_bitmap</span></a><span class="k2">(</span>filePath.c_str<span class="k2">(</span><span class="k2">)</span><span class="k2">)</span><span class="k2">;</span>
  <span class="k1">if</span><span class="k2">(</span>image <span class="k3">=</span><span class="k3">=</span> NULL<span class="k2">)</span>
  <span class="k2">{</span>
    std::cout <span class="k3">&lt;</span><span class="k3">&lt;</span> filePath.c_str<span class="k2">(</span><span class="k2">)</span> <span class="k3">&lt;</span><span class="k3">&lt;</span> <span class="s">" could not be loaded."</span> <span class="k3">&lt;</span><span class="k3">&lt;</span> std::endl<span class="k2">;</span>
    <a href="http://www.allegro.cc/manual/al_destroy_bitmap"><span class="a">al_destroy_bitmap</span></a><span class="k2">(</span>image<span class="k2">)</span><span class="k2">;</span>
  <span class="k2">}</span>

  name <span class="k3">=</span> n<span class="k2">;</span>
  maxHealth <span class="k3">=</span> <span class="n">10</span>, health <span class="k3">=</span> maxHealth<span class="k2">;</span>
  x <span class="k3">=</span> var, y <span class="k3">=</span> var2, this-&gt;speed <span class="k3">=</span> speed<span class="k2">;</span>
<span class="k2">}</span>
</pre></div></div><p>
</p></div>]]>
		</description>
		<author>no-reply@allegro.cc (Matias Persson)</author>
		<pubDate>Mon, 16 Feb 2015 11:38:16 +0000</pubDate>
	</item>
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		<description><![CDATA[<div class="mockup v2"><p>Post the full code for the initialize constructor and for initSystem.</p><p>The loaded png may be null because it was not found.</p><p>See <a href="https://wiki.allegro.cc/index.php?title=Loading_Resources_%28Troubleshooting%29">https://wiki.allegro.cc/index.php?title=Loading_Resources_%28Troubleshooting%29</a> for more help.
</p></div>]]>
		</description>
		<author>no-reply@allegro.cc (Edgar Reynaldo)</author>
		<pubDate>Mon, 16 Feb 2015 23:38:30 +0000</pubDate>
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		<description><![CDATA[<div class="mockup v2"><p>No, the image is certainly there.. I will post the rest of the code in 2-3 minutes.
</p><div class="source-code snippet"><div class="inner"><pre>initialize::initialize<span class="k2">(</span><span class="k2">)</span>
<span class="k2">{</span>
  display <span class="k3">=</span> NULL<span class="k2">;</span>
  event_queue <span class="k3">=</span> NULL<span class="k2">;</span>
  timer <span class="k3">=</span> NULL<span class="k2">;</span>
  frameTimer <span class="k3">=</span> NULL<span class="k2">;</span>
  
  loop <span class="k3">=</span> <span class="k1">true</span>, redraw <span class="k3">=</span> <span class="k1">false</span><span class="k2">;</span>
<span class="k2">}</span>
</pre></div></div><p>
</p><div class="source-code"><div class="toolbar"><span class="button numbers"><b>#</b></span><span class="button select">Select</span><span class="button expand">Expand</span></div><div class="inner"><span class="number">  1</span><span class="k1">int</span> initialize::initSystem<span class="k2">(</span><span class="k1">const</span> <span class="k1">float</span> FPS, <span class="k1">const</span> <span class="k1">float</span> frameFPS<span class="k2">)</span>
<span class="number">  2</span><span class="k2">{</span>
<span class="number">  3</span>  <span class="k1">if</span><span class="k2">(</span><span class="k3">!</span><a href="http://www.allegro.cc/manual/al_init"><span class="a">al_init</span></a><span class="k2">(</span><span class="k2">)</span><span class="k2">)</span>
<span class="number">  4</span>  <span class="k2">{</span>
<span class="number">  5</span>    <span class="k1">return</span> <span class="k3">-</span><span class="n">1</span><span class="k2">;</span>
<span class="number">  6</span>  <span class="k2">}</span>
<span class="number">  7</span>
<span class="number">  8</span>  display <span class="k3">=</span> <a href="http://www.allegro.cc/manual/al_create_display"><span class="a">al_create_display</span></a><span class="k2">(</span><span class="n">640</span>, <span class="n">480</span><span class="k2">)</span><span class="k2">;</span>
<span class="number">  9</span>  <span class="k1">if</span><span class="k2">(</span><span class="k3">!</span>display<span class="k2">)</span>
<span class="number"> 10</span>  <span class="k2">{</span>
<span class="number"> 11</span>    <a href="http://www.allegro.cc/manual/al_destroy_display"><span class="a">al_destroy_display</span></a><span class="k2">(</span>display<span class="k2">)</span><span class="k2">;</span>
<span class="number"> 12</span>    <span class="k1">return</span> <span class="k3">-</span><span class="n">1</span><span class="k2">;</span>
<span class="number"> 13</span>  <span class="k2">}</span>
<span class="number"> 14</span>
<span class="number"> 15</span>  event_queue <span class="k3">=</span> <a href="http://www.allegro.cc/manual/al_create_event_queue"><span class="a">al_create_event_queue</span></a><span class="k2">(</span><span class="k2">)</span><span class="k2">;</span>
<span class="number"> 16</span>  <span class="k1">if</span><span class="k2">(</span><span class="k3">!</span>event_queue<span class="k2">)</span>
<span class="number"> 17</span>  <span class="k2">{</span>
<span class="number"> 18</span>    <a href="http://www.allegro.cc/manual/al_destroy_event_queue"><span class="a">al_destroy_event_queue</span></a><span class="k2">(</span>event_queue<span class="k2">)</span><span class="k2">;</span>
<span class="number"> 19</span>    <a href="http://www.allegro.cc/manual/al_destroy_display"><span class="a">al_destroy_display</span></a><span class="k2">(</span>display<span class="k2">)</span><span class="k2">;</span>
<span class="number"> 20</span>    <span class="k1">return</span> <span class="k3">-</span><span class="n">1</span><span class="k2">;</span>
<span class="number"> 21</span>  <span class="k2">}</span>
<span class="number"> 22</span>
<span class="number"> 23</span>  timer <span class="k3">=</span> <a href="http://www.allegro.cc/manual/al_create_timer"><span class="a">al_create_timer</span></a><span class="k2">(</span><span class="n">1</span>.<span class="n">0</span> <span class="k3">/</span> FPS<span class="k2">)</span><span class="k2">;</span>
<span class="number"> 24</span>  <span class="k1">if</span><span class="k2">(</span><span class="k3">!</span>timer<span class="k2">)</span>
<span class="number"> 25</span>  <span class="k2">{</span>
<span class="number"> 26</span>    <a href="http://www.allegro.cc/manual/al_destroy_timer"><span class="a">al_destroy_timer</span></a><span class="k2">(</span>timer<span class="k2">)</span><span class="k2">;</span>
<span class="number"> 27</span>    <a href="http://www.allegro.cc/manual/al_destroy_event_queue"><span class="a">al_destroy_event_queue</span></a><span class="k2">(</span>event_queue<span class="k2">)</span><span class="k2">;</span>
<span class="number"> 28</span>    <a href="http://www.allegro.cc/manual/al_destroy_display"><span class="a">al_destroy_display</span></a><span class="k2">(</span>display<span class="k2">)</span><span class="k2">;</span>
<span class="number"> 29</span>    <span class="k1">return</span> <span class="k3">-</span><span class="n">1</span><span class="k2">;</span>
<span class="number"> 30</span>  <span class="k2">}</span>
<span class="number"> 31</span>
<span class="number"> 32</span>  frameTimer <span class="k3">=</span> <a href="http://www.allegro.cc/manual/al_create_timer"><span class="a">al_create_timer</span></a><span class="k2">(</span><span class="n">1</span>.<span class="n">0</span> <span class="k3">/</span> frameFPS<span class="k2">)</span><span class="k2">;</span>
<span class="number"> 33</span>  <span class="k1">if</span><span class="k2">(</span><span class="k3">!</span>frameTimer<span class="k2">)</span>
<span class="number"> 34</span>  <span class="k2">{</span>
<span class="number"> 35</span>    <a href="http://www.allegro.cc/manual/al_destroy_timer"><span class="a">al_destroy_timer</span></a><span class="k2">(</span>frameTimer<span class="k2">)</span><span class="k2">;</span>
<span class="number"> 36</span>    <a href="http://www.allegro.cc/manual/al_destroy_timer"><span class="a">al_destroy_timer</span></a><span class="k2">(</span>timer<span class="k2">)</span><span class="k2">;</span>
<span class="number"> 37</span>    <a href="http://www.allegro.cc/manual/al_destroy_event_queue"><span class="a">al_destroy_event_queue</span></a><span class="k2">(</span>event_queue<span class="k2">)</span><span class="k2">;</span>
<span class="number"> 38</span>    <a href="http://www.allegro.cc/manual/al_destroy_display"><span class="a">al_destroy_display</span></a><span class="k2">(</span>display<span class="k2">)</span><span class="k2">;</span>
<span class="number"> 39</span>    <span class="k1">return</span> <span class="k3">-</span><span class="n">1</span><span class="k2">;</span>
<span class="number"> 40</span>  <span class="k2">}</span>
<span class="number"> 41</span>
<span class="number"> 42</span>  <a href="http://www.allegro.cc/manual/al_install_keyboard"><span class="a">al_install_keyboard</span></a><span class="k2">(</span><span class="k2">)</span><span class="k2">;</span>
<span class="number"> 43</span>  <a href="http://www.allegro.cc/manual/al_init_image_addon"><span class="a">al_init_image_addon</span></a><span class="k2">(</span><span class="k2">)</span><span class="k2">;</span>
<span class="number"> 44</span>
<span class="number"> 45</span>  c <span class="k3">=</span> <span class="k1">new</span> Character<span class="k2">(</span><span class="s">"player.png"</span>, <span class="s">"Hero"</span>, <span class="n">40</span>, <span class="n">40</span>, <span class="n">3</span><span class="k2">)</span><span class="k2">;</span>
<span class="number"> 46</span>  std::cout <span class="k3">&lt;</span><span class="k3">&lt;</span> c-&gt;getName<span class="k2">(</span><span class="k2">)</span> <span class="k3">&lt;</span><span class="k3">&lt;</span> <span class="s">": "</span> <span class="k3">&lt;</span><span class="k3">&lt;</span> c-&gt;getHealth<span class="k2">(</span><span class="k2">)</span> <span class="k3">&lt;</span><span class="k3">&lt;</span> <span class="s">" HP."</span> <span class="k3">&lt;</span><span class="k3">&lt;</span> std::endl<span class="k2">;</span>
<span class="number"> 47</span>
<span class="number"> 48</span>  <a href="http://www.allegro.cc/manual/al_register_event_source"><span class="a">al_register_event_source</span></a><span class="k2">(</span>event_queue, <a href="http://www.allegro.cc/manual/al_get_display_event_source"><span class="a">al_get_display_event_source</span></a><span class="k2">(</span>display<span class="k2">)</span><span class="k2">)</span><span class="k2">;</span>
<span class="number"> 49</span>  <a href="http://www.allegro.cc/manual/al_register_event_source"><span class="a">al_register_event_source</span></a><span class="k2">(</span>event_queue, <a href="http://www.allegro.cc/manual/al_get_timer_event_source"><span class="a">al_get_timer_event_source</span></a><span class="k2">(</span>timer<span class="k2">)</span><span class="k2">)</span><span class="k2">;</span>
<span class="number"> 50</span>  <a href="http://www.allegro.cc/manual/al_register_event_source"><span class="a">al_register_event_source</span></a><span class="k2">(</span>event_queue, <a href="http://www.allegro.cc/manual/al_get_keyboard_event_source"><span class="a">al_get_keyboard_event_source</span></a><span class="k2">(</span><span class="k2">)</span><span class="k2">)</span><span class="k2">;</span>
<span class="number"> 51</span>
<span class="number"> 52</span>  gameLoop<span class="k2">(</span><span class="k2">)</span><span class="k2">;</span>
<span class="number"> 53</span>
<span class="number"> 54</span>  <span class="k1">return</span> <span class="n">0</span><span class="k2">;</span>
<span class="number"> 55</span><span class="k2">}</span>
</div></div><p>
</p></div>]]>
		</description>
		<author>no-reply@allegro.cc (Matias Persson)</author>
		<pubDate>Tue, 17 Feb 2015 00:24:15 +0000</pubDate>
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		<description><![CDATA[<div class="mockup v2"><div class="quote_container"><div class="title"><a href="http://www.allegro.cc/forums/thread/615086/1010393#target">Matias Persson</a> said:</div><div class="quote"><p> No, the image is certainly there.</p></div></div><p>Stick a <span class="source-code"><a href="http://www.allegro.cc/manual/al_filename_exists"><span class="a">al_filename_exists</span></a><span class="k2">(</span><span class="s">"player.png"</span><span class="k2">)</span></span> somewhere and make sure it returns true. The only other real reason it wouldn&#39;t work is if the image addon was compiled without png support (unlikely unless you compiled it yourself) or the png file itself is corrupted.
</p></div>]]>
		</description>
		<author>no-reply@allegro.cc (SiegeLord)</author>
		<pubDate>Tue, 17 Feb 2015 00:31:45 +0000</pubDate>
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		<description><![CDATA[<div class="mockup v2"><p>I am pretty sure that the image file is NOT corrupted, that being said I&#39;ve both jpg and bmp too which I just saved in paint which usually works.. I&#39;m using pre-compiled Allegro 5.0.10 bins.</p><p>Edit: I tried al_filename_exists(&quot;player.png&quot;) and it returns true.</p><p>Edit edit: The program works now ALL OF A SUDDEN!?!? I haven&#39;t changed a thing.<br />I still do appreciate everyone&#39;s help, thanks <img src="http://www.allegro.cc/forums/smileys/smiley.gif" alt=":)" />
</p></div>]]>
		</description>
		<author>no-reply@allegro.cc (Matias Persson)</author>
		<pubDate>Tue, 17 Feb 2015 00:56:46 +0000</pubDate>
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		<description><![CDATA[<div class="mockup v2"><p>That&#39;s the Allegro way.
</p></div>]]>
		</description>
		<author>no-reply@allegro.cc (SiegeLord)</author>
		<pubDate>Tue, 17 Feb 2015 01:39:04 +0000</pubDate>
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		<description><![CDATA[<div class="mockup v2"><p>Hm, random things happing tend to mean you have a memory corruption issue <img src="http://www.allegro.cc/forums/smileys/shocked.gif" alt=":o" /> change a line of code, even adding a printf can &quot;hide&quot; them temporarily.
</p></div>]]>
		</description>
		<author>no-reply@allegro.cc (Thomas Fjellstrom)</author>
		<pubDate>Tue, 17 Feb 2015 01:41:08 +0000</pubDate>
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