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Retidy, removing align=left from headings and empty paragraphs

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James Gregory 2013-12-30 15:37:13 +11:00
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@ -1,5 +1,4 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
@ -19,17 +18,21 @@
<center>
<table border="1">
<tr>
<td><a href="49-02.html">Previous</a></td>
<td>
<a href="49-02.html">Previous</a>
</td>
<td><a href="index.html">Table of Contents</a></td>
<td>
<a href="index.html">Table of Contents</a>
</td>
<td><a href="49-04.html">Next</a></td>
<td>
<a href="49-04.html">Next</a>
</td>
</tr>
</table>
</center>
<p><br /></p>
<p>It would be handy to have a function that, given a base image and mask, generates the four image and mask alignments and fills in the <b>MaskedImage</b> structure. Listing 49.3, together with the include file in Listing 49.4 and the system memory-to-display memory block-copy routine in Listing 48.4 (in the previous chapter) does just that. It would be faster if Listing 49.3 were in assembly language, but there&rsquo;s no reason to think that generating aligned images needs to be particularly fast; in such cases, I prefer to use C, for reasons of coding speed, fewer bugs, and maintainability.</p>
<p><b>LISTING 49.3 L49-3.C</b></p>
@ -123,7 +126,7 @@ typedef struct {
} MaskedImage;
</pre>
<h4 align="left" id="Heading5">Notes on Masked Copying</h4>
<h4 id="Heading5">Notes on Masked Copying</h4>
<p>Listings 49.1 and 49.2, like all Mode X code I&rsquo;ve presented, perform no clipping, because clipping code would complicate the listings too much. While clipping can be implemented directly in the low-level Mode X routines (at the beginning of Listing 49.1, for instance), another, potentially simpler approach would be to perform clipping at a higher level, modifying the coordinates and dimensions passed to low-level routines such as Listings 49.1 and 49.2 as necessary to accomplish the desired clipping. It is for precisely this reason that the low-level Mode X routines support programmable start coordinates in the source images, rather than assuming (0,0); likewise for the distinction between the width of the image and the width of the area of the image to draw.</p>
@ -137,16 +140,20 @@ typedef struct {
</tr>
</table>
<p><br /></p>
<center>
<table border="1">
<tr>
<td><a href="49-02.html">Previous</a></td>
<td>
<a href="49-02.html">Previous</a>
</td>
<td><a href="index.html">Table of Contents</a></td>
<td>
<a href="index.html">Table of Contents</a>
</td>
<td><a href="49-04.html">Next</a></td>
<td>
<a href="49-04.html">Next</a>
</td>
</tr>
</table>
</center>