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<div class="twikiMiddleContainer"><div class="twikiMain"><div class="twikiSearchResults"><div class="twikiSearchResultsHeader">&nbsp;<tt><b>&lt;&lt;O&gt;&gt;</b></tt>&nbsp; Difference Topic
		<b><a href="../../view/Cinelerra/OverlayMode">OverlayMode</a></b>
		(<a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/OverlayMode?rev=r1.5">r1.5</a> - 26&nbsp;Jan&nbsp;2004 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a>)</div>
<table class="twikiDiffTable" width="100%" cellspacing="0">
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">
<h3><a name="Overlay_Mode_s"> </a><a name="_Overlay_Mode_s"> </a> <a class="twikiLink" href="../../view/Cinelerra/OverlayMode">Overlay Mode</a>s </h3>
<p />
Every video <a class="twikiLink" href="../../view/Cinelerra/MediaTrack">MediaTrack</a> has an <a class="twikiLink" href="../../view/Cinelerra/OverlayMode">OverlayMode</a>, accessible by expanding the track. The overlay mode is a pulldown menu on the left under the fader. When collapsed, it displays an icon representing the current overlay mode.
</td></tr>

</table></div><div class="twikiSearchResults"><div class="twikiSearchResultsHeader">&nbsp;<tt><b>&lt;&lt;O&gt;&gt;</b></tt>&nbsp; Difference Topic
		<b><a href="../../view/Cinelerra/OverlayMode">OverlayMode</a></b>
		(<a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/OverlayMode?rev=r1.4">r1.4</a> - 08&nbsp;Jan&nbsp;2004 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a>)</div>
<table class="twikiDiffTable" width="100%" cellspacing="0">
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">
<h3><a name="Overlay_Mode_s"> </a><a name="_Overlay_Mode_s"> </a> <a class="twikiLink" href="../../view/Cinelerra/OverlayMode">Overlay Mode</a>s </h3>
</td></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffChangedHeader" colspan ="9"><b> Changed: </b></td></tr>
<tr><td bgcolor="#ff9999" class="twikiDiffDeletedMarker" valign="top" width="1%">&lt;<br />&lt;</td>
<td class="twikiDiffDeletedText">
Every video <span class="twikiNewLink" style="background : #FFFFCE;"><font color="#0000FF">Track</font><a href="http://www.ftconsult.com/twiki/bin/edit/Cinelerra/Track?topicparent=Cinelerra.OverlayMode"><sup>?</sup></a></span> has an <a class="twikiLink" href="../../view/Cinelerra/OverlayMode">OverlayMode</a>, accessible by expanding the track. The overlay mode is a pulldown menu on the left under the fader. When collapsed, it displays an icon representing the current overlay mode.
</td></tr>
<tr><td bgcolor="#ccccff" class="twikiDiffAddedMarker" valign="top" width="1%">&gt;<br />&gt;</td>
<td class="twikiDiffAddedText">
Every video <a class="twikiLink" href="../../view/Cinelerra/MediaTrack">MediaTrack</a> has an <a class="twikiLink" href="../../view/Cinelerra/OverlayMode">OverlayMode</a>, accessible by expanding the track. The overlay mode is a pulldown menu on the left under the fader. When collapsed, it displays an icon representing the current overlay mode.
</td></tr>
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">
<p />
<img src="../../../pub/Cinelerra/CinelerraImages/overlay_mode.png" alt="overlay_mode.png" /><br>
Select the expand track toggle to view all the options for a video track if you can't see the overlay mode. The overlay mode of video tracks is normal by default. Select other modes by clicking the overlay button and selecting an item from the popup menu.
</td></tr>

</table></div><div class="twikiSearchResults"><div class="twikiSearchResultsHeader">&nbsp;<tt><b>&lt;&lt;O&gt;&gt;</b></tt>&nbsp; Difference Topic
		<b><a href="../../view/Cinelerra/OverlayMode">OverlayMode</a></b>
		(<a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/OverlayMode?rev=r1.3">r1.3</a> - 07&nbsp;Jan&nbsp;2004 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a>)</div>
<table class="twikiDiffTable" width="100%" cellspacing="0">
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">
<h3><a name="Overlay_Mode_s"> </a><a name="_Overlay_Mode_s"> </a> <a class="twikiLink" href="../../view/Cinelerra/OverlayMode">Overlay Mode</a>s </h3>
<p />
Every video <span class="twikiNewLink" style="background : #FFFFCE;"><font color="#0000FF">Track</font><a href="http://www.ftconsult.com/twiki/bin/edit/Cinelerra/Track?topicparent=Cinelerra.OverlayMode"><sup>?</sup></a></span> has an <a class="twikiLink" href="../../view/Cinelerra/OverlayMode">OverlayMode</a>, accessible by expanding the track. The overlay mode is a pulldown menu on the left under the fader. When collapsed, it displays an icon representing the current overlay mode.
</td></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffChangedHeader" colspan ="9"><b> Changed: </b></td></tr>
<tr><td bgcolor="#ff9999" class="twikiDiffDeletedMarker" valign="top" width="1%">&lt;<br />&lt;</td>
<td class="twikiDiffDeletedText">
<img src="../../../pub/Cinelerra/CinelerraImages/overlay_mode.png" /><br>
</td></tr>
<tr><td bgcolor="#ccccff" class="twikiDiffAddedMarker" valign="top" width="1%">&gt;<br />&gt;</td>
<td class="twikiDiffAddedText">
<img src="../../../pub/Cinelerra/CinelerraImages/overlay_mode.png" alt="overlay_mode.png" /><br>
</td></tr>
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">
Select the expand track toggle to view all the options for a video track if you can't see the overlay mode. The overlay mode of video tracks is normal by default. Select other modes by clicking the overlay button and selecting an item from the popup menu.
<p />
Overlay modes are processed inside the projector stage of compositing. The different modes are summarized below.
</td></tr>

</table></div><div class="twikiSearchResults"><div class="twikiSearchResultsHeader">&nbsp;<tt><b>&lt;&lt;O&gt;&gt;</b></tt>&nbsp; Difference Topic
		<b><a href="../../view/Cinelerra/OverlayMode">OverlayMode</a></b>
		(<a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/OverlayMode?rev=r1.2">r1.2</a> - 06&nbsp;Jan&nbsp;2004 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a>)</div>
<table class="twikiDiffTable" width="100%" cellspacing="0">
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">
<h3><a name="Overlay_Mode_s"> </a><a name="_Overlay_Mode_s"> </a> <a class="twikiLink" href="../../view/Cinelerra/OverlayMode">Overlay Mode</a>s </h3>
<p />
Every video <span class="twikiNewLink" style="background : #FFFFCE;"><font color="#0000FF">Track</font><a href="http://www.ftconsult.com/twiki/bin/edit/Cinelerra/Track?topicparent=Cinelerra.OverlayMode"><sup>?</sup></a></span> has an <a class="twikiLink" href="../../view/Cinelerra/OverlayMode">OverlayMode</a>, accessible by expanding the track. The overlay mode is a pulldown menu on the left under the fader. When collapsed, it displays an icon representing the current overlay mode.
</td></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffChangedHeader" colspan ="9"><b> Changed: </b></td></tr>
<tr><td bgcolor="#ff9999" class="twikiDiffDeletedMarker" valign="top" width="1%">&lt;<br />&lt;</td>
<td class="twikiDiffDeletedText">
Select the expandpatch_checked.png expand track toggle to view all the options for a video track if you can't see the overlay mode. The overlay mode of video tracks is normal by default. Select other modes by clicking the overlay button and selecting an item from the popup menu.
</td></tr>
<tr><td bgcolor="#ccccff" class="twikiDiffAddedMarker" valign="top" width="1%">&gt;<br />&gt;</td>
<td class="twikiDiffAddedText">
<img src="../../../pub/Cinelerra/CinelerraImages/overlay_mode.png" /><br>
Select the expand track toggle to view all the options for a video track if you can't see the overlay mode. The overlay mode of video tracks is normal by default. Select other modes by clicking the overlay button and selecting an item from the popup menu.
</td></tr>
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">
<p />
Overlay modes are processed inside the projector stage of compositing. The different modes are summarized below.
</td></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffChangedHeader" colspan ="9"><b> Changed: </b></td></tr>
<tr><td bgcolor="#ff9999" class="twikiDiffDeletedMarker" valign="top" width="1%">&lt;<br />&lt;</td>
<td class="twikiDiffDeletedText">
<ul>
<li> Normal uses a traditional Porter-Diff equation to blend tracks with alpha. When no alpha exists in the project color model, the new track always replaces the output.
</li>
<li> Addition In this mode, whatever is in the output is added to the current track. The result is blended based on the current track's alpha onto the output.
</li>
<li> Subtraction In this mode, the current track is subtracted from the output and the result is alpha blended onto the output.
</li>
<li> Multiply is the most useful operation. The current track is multiplied by the output and the result blended onto the output. Usually a black and white image with no alpha channel or a white title on a black image is used as the current track. With the multiply operation, only the output portions under the white area show.
</li>
<li> Divide divides the current track by the output and the result is blended into the output. It usually results in overloaded levels.
</li>
<li> Replace does no blending and overwrites the output with the current track. 
</li>
</ul>
</td></tr>
<tr><td bgcolor="#ccccff" class="twikiDiffAddedMarker" valign="top" width="1%">&gt;<br />&gt;</td>
<td class="twikiDiffAddedText">
<h4><a name="Normal"> </a> Normal </h4>
<ul>
<li> Uses a traditional Porter-Diff equation to blend tracks with alpha. When no alpha exists in the project color model, the new track always replaces the output.
</li>
</ul>
<h4><a name="Addition"> </a> Addition </h4>
<ul>
<li> In this mode, whatever is in the output is added to the current track. The result is blended based on the current track's alpha onto the output.
</li>
</ul>
<h4><a name="Subtraction"> </a> Subtraction </h4>
<ul>
<li> In this mode, the current track is subtracted from the output and the result is alpha blended onto the output.
</li>
</ul>
<h4><a name="Multiply"> </a> Multiply </h4>
<ul>
<li> is the most useful operation. The current track is multiplied by the output and the result blended onto the output. Usually a black and white image with no alpha channel or a white title on a black image is used as the current track. With the multiply operation, only the output portions under the white area show.
</li>
</ul>
<h4><a name="Divide"> </a> Divide </h4>
<ul>
<li> divides the current track by the output and the result is blended into the output. It usually results in overloaded levels.
</li>
</ul>
<h4><a name="Replace"> </a> Replace </h4>
<ul>
<li> does no blending and overwrites the output with the current track. 
</li>
</ul>
</td></tr>
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">

</td></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffChangedHeader" colspan ="9"><b> Changed: </b></td></tr>
<tr><td bgcolor="#ff9999" class="twikiDiffDeletedMarker" valign="top" width="1%">&lt;<br />&lt;</td>
<td class="twikiDiffDeletedText">
-- <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a> - 21 Dec 2003 from <a class="twikiLink" href="../../view/Cinelerra/SecretsOfCinelerra">SecretsOfCinelerra</a>
</td></tr>
<tr><td bgcolor="#ccccff" class="twikiDiffAddedMarker" valign="top" width="1%">&gt;<br />&gt;</td>
<td class="twikiDiffAddedText">
-- <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a> - 21 Dec 2003 <strong><em>from <a class="twikiLink" href="../../view/Cinelerra/SecretsOfCinelerra">SecretsOfCinelerra</a></em></strong>
</td></tr>
<tr><td valign="top" bgcolor="#ffffff" class="twikiDiffUnchangedText" width="1%"><br /></td>
<td class="twikiDiffUnchangedText">
<hr />
<table border="1" cellspacing="1" cellpadding="0">
<tr><th class="twikiFirstCol" bgcolor="#99CCCC"> <strong>META TOPICMOVED</strong> </th><td bgcolor="#FFFFCC"> <span class="twikiNewLink" style="background : #FFFFCE;"><font color="#0000FF">AlexFerrer</font><a href="http://www.ftconsult.com/twiki/bin/edit/Cinelerra/AlexFerrer?topicparent=Cinelerra.OverlayMode"><sup>?</sup></a></span> </td><td bgcolor="#FFFFCC"> date="1072033746" from="Cinelerra.OverlayModes" to="Cinelerra.OverlayMode" </td></tr>
</table>
</td></tr>

</table></div><div class="twikiSearchResults"><div class="twikiSearchResultsHeader">&nbsp;<tt><b>&lt;&lt;O&gt;&gt;</b></tt>&nbsp; Difference Topic
		<b><a href="../../view/Cinelerra/OverlayMode">OverlayMode</a></b>
		(<a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/OverlayMode?rev=r1.1">r1.1</a> - 21&nbsp;Dec&nbsp;2003 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a>)</div>
<table class="twikiDiffTable" width="100%" cellspacing="0">
<tr bgcolor="#eeeeee" class="twikiDiffLineNumberHeader"><th align="left" colspan="9">Line: 1 to 1</th></tr>
<tr><td bgcolor="#D0FFD0" class="twikiDiffAddedHeader" colspan ="9"><b> Added:   </b>
</td></tr>
<tr><td bgcolor="#ccccff" class="twikiDiffAddedMarker" valign="top" width="1%">&gt;<br />&gt;</td>
<td class="twikiDiffAddedText">
<h3><a name="Overlay_Mode_s"> </a><a name="_Overlay_Mode_s"> </a> <a class="twikiLink" href="../../view/Cinelerra/OverlayMode">Overlay Mode</a>s </h3>
<p />
Every video <span class="twikiNewLink" style="background : #FFFFCE;"><font color="#0000FF">Track</font><a href="http://www.ftconsult.com/twiki/bin/edit/Cinelerra/Track?topicparent=Cinelerra.OverlayMode"><sup>?</sup></a></span> has an <a class="twikiLink" href="../../view/Cinelerra/OverlayMode">OverlayMode</a>, accessible by expanding the track. The overlay mode is a pulldown menu on the left under the fader. When collapsed, it displays an icon representing the current overlay mode.
<p />
Select the expandpatch_checked.png expand track toggle to view all the options for a video track if you can't see the overlay mode. The overlay mode of video tracks is normal by default. Select other modes by clicking the overlay button and selecting an item from the popup menu.
<p />
Overlay modes are processed inside the projector stage of compositing. The different modes are summarized below.
<p />
<ul>
<li> Normal uses a traditional Porter-Diff equation to blend tracks with alpha. When no alpha exists in the project color model, the new track always replaces the output.
</li>
<li> Addition In this mode, whatever is in the output is added to the current track. The result is blended based on the current track's alpha onto the output.
</li>
<li> Subtraction In this mode, the current track is subtracted from the output and the result is alpha blended onto the output.
</li>
<li> Multiply is the most useful operation. The current track is multiplied by the output and the result blended onto the output. Usually a black and white image with no alpha channel or a white title on a black image is used as the current track. With the multiply operation, only the output portions under the white area show.
</li>
<li> Divide divides the current track by the output and the result is blended into the output. It usually results in overloaded levels.
</li>
<li> Replace does no blending and overwrites the output with the current track. 
</li>
</ul>
<p />
-- <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a> - 21 Dec 2003 from <a class="twikiLink" href="../../view/Cinelerra/SecretsOfCinelerra">SecretsOfCinelerra</a>
<hr />
<table border="1" cellspacing="1" cellpadding="0">
<tr><th class="twikiFirstCol" bgcolor="#99CCCC"> <strong>META TOPICMOVED</strong> </th><td bgcolor="#FFFFCC"> <span class="twikiNewLink" style="background : #FFFFCE;"><font color="#0000FF">AlexFerrer</font><a href="http://www.ftconsult.com/twiki/bin/edit/Cinelerra/AlexFerrer?topicparent=Cinelerra.OverlayMode"><sup>?</sup></a></span> </td><td bgcolor="#FFFFCC"> date="1072033746" from="Cinelerra.OverlayModes" to="Cinelerra.OverlayMode" </td></tr>
</table>
</td></tr>

</table></div><div class="twikiTopicAction"><a href="../../view/Cinelerra/OverlayMode">View topic</a>
 <span class="twikiSeparator">|</span> <a href="OverlayMode">Diffs</a>  | <a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/OverlayMode?rev=1.5">r1.5</a> | <a href="http://www.ftconsult.com/twiki/bin/rdiff/Cinelerra/OverlayMode?rev1=1.5&rev2=1.4">&gt;</a> | <a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/OverlayMode?rev=1.4">r1.4</a> | <a href="http://www.ftconsult.com/twiki/bin/rdiff/Cinelerra/OverlayMode?rev1=1.4&rev2=1.3">&gt;</a> | <a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/OverlayMode?rev=1.3">r1.3</a>
 <span class="twikiSeparator">|</span> <a href="http://www.ftconsult.com/twiki/bin/oops/Cinelerra/OverlayMode?template=oopsmore&param1=1.5&param2=1.5">More</a>
</div><div class="twikiTopicInfo"><span class="twikiRevInfo twikiGrayText">Revision r1.1 - 21 Dec 2003 - 19:15 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a><br />
Revision r1.5 - 26 Jan 2004 - 01:03 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a></span></div>
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