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[sdlgit/SDL-Site.git] / pages / SDL-PixelFormat.html-inc

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<h3 id="TOP">Index</h3>

<ul><li><a href="#NAME">NAME</a>
<ul><li><a href="#CATEGORY">CATEGORY</a></li>
</ul>
</li>
<li><a href="#SYNOPSIS">SYNOPSIS</a></li>
<li><a href="#DESCRIPTION">DESCRIPTION</a></li>
<li><a href="#METHODS">METHODS</a>
<ul><li><a href="#palette">palette</a></li>
<li><a href="#BitsPerPixel">BitsPerPixel </a></li>
<li><a href="#BytesPerPixel">BytesPerPixel</a></li>
<li><a href="#RGBA_loss">[RGBA]loss</a></li>
<li><a href="#RGBA_shift">[RGBA]shift</a></li>
<li><a href="#RGBA_mask">[RGBA]mask</a></li>
<li><a href="#colorkey">colorkey</a></li>
<li><a href="#alpha">alpha</a></li>
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<li><a href="#SEE_ALSO">SEE ALSO</a>
</li>
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<h1 id="NAME">NAME</h1><p><a href="#TOP" class="toplink">Top</a></p>
<div id="NAME_CONTENT">
<p>SDL::PixelFormat - Stores surface format information</p>

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<h2 id="CATEGORY">CATEGORY</h2>
<div id="CATEGORY_CONTENT">
<p>Core, Video, Structure</p>

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<h1 id="SYNOPSIS">SYNOPSIS</h1><p><a href="#TOP" class="toplink">Top</a></p>
<div id="SYNOPSIS_CONTENT">
<pre>	my $surface = SDL::Surface-&gt;new( ...
	$surface-&gt;format; #this returns the PixelFormat object attached to this surface

</pre>
<p>PixelFormat is only created in a <code>SDL::Surface</code>. This module only provides getters to the surface's pixelformat. Later on we will provide setting capability.</p>





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<h1 id="DESCRIPTION">DESCRIPTION</h1><p><a href="#TOP" class="toplink">Top</a></p>
<div id="DESCRIPTION_CONTENT">
<p>An <code>SDL::PixelFormat </code> stores surface format information</p>

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<h1 id="METHODS">METHODS</h1><p><a href="#TOP" class="toplink">Top</a></p>
<div id="METHODS_CONTENT">

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<h2 id="palette">palette</h2>
<div id="palette_CONTENT">
<pre>	$surface-&gt;format-&gt;palette;

</pre>
<p>Returns the <code>SDL_Palette</code> and <a href="SDL-Palette.html">SDL::Palette</a> of the format of the surface.</p>

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<h2 id="BitsPerPixel">BitsPerPixel </h2>
<div id="BitsPerPixel_CONTENT">
<pre>	$surface-&gt;format-&gt;BitsPerPixel;

</pre>
<p>The number of bits used to represent each pixel in a surface. Usually 8, 16, 24 or 32. (1 to 7 are not allowed when creating a surface or open a video mode</p>

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<h2 id="BytesPerPixel">BytesPerPixel</h2>
<div id="BytesPerPixel_CONTENT">
<pre>	$surface-&gt;format-&gt;BytesPerPixel;

</pre>
<p>The number of bytes used to represent each pixel in a surface. Usually one to four.</p>

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<h2 id="RGBA_loss">[RGBA]loss</h2>
<div id="RGBA_loss_CONTENT">
<pre>	$surface-&gt;format-&gt;Rloss; #red   loss
	$surface-&gt;format-&gt;Bloss; #blue  loss
	$surface-&gt;format-&gt;Gloss; #green loss	
	$surface-&gt;format-&gt;Aloss; #alpha loss

</pre>
<p>Precision loss of each color component (2[RGBA]loss)</p>

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<h2 id="RGBA_shift">[RGBA]shift</h2>
<div id="RGBA_shift_CONTENT">
<pre>	$surface-&gt;format-&gt;Rshift; #red   shift
	$surface-&gt;format-&gt;Bshift; #blue  shift
	$surface-&gt;format-&gt;Gshift; #green shift	
	$surface-&gt;format-&gt;Ashift; #alpha shift

</pre>
<p>Binary left shift of each color component in the pixel value</p>





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<h2 id="RGBA_mask">[RGBA]mask</h2>
<div id="RGBA_mask_CONTENT">
<pre>	$surface-&gt;format-&gt;Rmask; #red   mask
	$surface-&gt;format-&gt;Bmask; #blue  mask
	$surface-&gt;format-&gt;Gmask; #green mask	
	$surface-&gt;format-&gt;Amask; #alpha mask

</pre>
<p>Binary left shift of each color component in the pixel value</p>

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<h2 id="colorkey">colorkey</h2>
<div id="colorkey_CONTENT">
<pre>	$surface-&gt;format-&gt;colorkey;

</pre>
<p>Pixel value of transparent pixels.	</p>

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<h2 id="alpha">alpha</h2>
<div id="alpha_CONTENT">
<pre>	$surface-&gt;format-&gt;alpha;

</pre>
<p>Overall surface alpha value</p>








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<h1 id="SEE_ALSO">SEE ALSO</h1><p><a href="#TOP" class="toplink">Top</a></p>
<div id="SEE_ALSO_CONTENT">
<p><a href="SDL-Surface.html">SDL::Surface</a></p>

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