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https://github.com/DxWnd/DxWnd.reloaded
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126 lines
6.7 KiB
HTML
126 lines
6.7 KiB
HTML
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<html>
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<head>
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<title>Time Stretching</title>
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<meta name="generator" content="HelpNDoc Personal Edition 4.6.2.573">
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top.FrameTOC.SelectTocItem("TimeStretching");
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<div id="topic_header">
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<div id="topic_header_content">
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<h1 id="topic_header_text">Time Stretching</h1>
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<div id="topic_breadcrumb">
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<a href="Theconfigurationpanel.html">The configuration panel</a> ›› <a href="Timing.html">Timing</a> ›› </div>
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</div>
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<div id="topic_header_nav">
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<a href="Timing.html"><img src="img/arrow_up.png" alt="Parent"/></a>
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<div id="topic_content">
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<p></p>
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<div class="rvps2"><table width="100%" border="1" cellpadding="1" cellspacing="2" style="border-color: #000000; border-style: solid; border-spacing: 2px;">
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<tr valign="top">
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<td width="188" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts6">Time Stretching – initial</span></p>
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</td>
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<td width="134" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts16">TIMESTRETCH</span></p>
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</td>
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<td width="1215" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts6">If this option is checked, DxWnd tries to emulate an accelerated (xn) or decelerated (:n) time flow. The value set in the listbox is the initial value, that can be altered by means of the time control slider in the time panel (see </span><span class="rvts14">Time Slider</span><span class="rvts6">). When checked, DxWnd stretches time in the timing API (such as with GetSystemTime()), the query performance APIs, and the Sleep APIs, which are the most common ways to control a program's timing. </span></p>
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</td>
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</tr>
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<tr valign="top">
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<td width="188" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts6">Show time stretch</span></p>
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</td>
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<td width="134" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts16">SHOWTIMESTRETCH</span></p>
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</td>
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<td width="1215" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts6">When checked, the time stretch ratio is drawn as an overlay in a corner of the screen, sometimes moving to other corners when it is updated.</span></p>
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</td>
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</tr>
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<tr valign="top">
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<td width="188" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts6">Fine time adjust</span></p>
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</td>
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<td width="134" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts16">FINETIMING</span></p>
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</td>
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<td width="1215" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts6">When checked, the time stretch ratio shows ticks in finer increments, switching from a 50% change with each tick to a 10% change with each tick. This limits the range to 0.5x-2.0x but allows for finer timing control.</span></p>
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</td>
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</tr>
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<tr valign="top">
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<td width="188" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts6">Intercept RDTSC opcode</span></p>
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</td>
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<td width="134" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts16">INTERCEPTRDTSC</span></p>
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</td>
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<td width="1215" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts6">Program timing is usually determined by system calls that can be easily and safely hooked to stretch the flow of time. There is one possible exception, however: when the program embeds in its assembly the RDTSC assembly instruction opcodes that directly access the hardware clock. This timing value can still be intercepted and manipulated, but using a more delicate technique that searches for the assembly code and replaces it with specific calls. This is why I preferred to make this option available with a dedicated flag to be activated when necessary. The flag should be set whenever adjusting the time stretching option does not alter the time flow.</span></p>
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</td>
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</tr>
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<tr valign="top">
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<td width="188" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts6">Stretch timers</span></p>
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</td>
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<td width="134" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts16">STRETCHTIMERS</span></p>
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</td>
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<td width="1215" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts6">When checked, the window timers are stretched, namely the user32.dll timers set by SetTimer and the multimedia timers in winmm.dll set by timeSetEvent().</span></p>
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</td>
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</tr>
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<tr valign="top">
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<td width="188" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts6">Normalize Performance Counter</span></p>
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</td>
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<td width="134" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts16">???</span></p>
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</td>
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<td width="1215" style="border-color: #000000; border-style: solid; padding: 1px;"><p class="rvps2"><span class="rvts6">???</span></p>
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</td>
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</tr>
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</table>
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</div>
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<p></p>
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<p class="rvps5"><span class="rvts12">Created with the Personal Edition of HelpNDoc: </span><a class="rvts13" href="http://www.helpndoc.com">Easy EBook and documentation generator</a></p>
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</div>
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<div id="topic_footer">
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<div id="topic_footer_content">
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Copyright © 2016 by GHO. All Rights Reserved.</div>
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</html>
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