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<h1>vtkImageBlend Class Reference</h1><!-- doxytag: class="vtkImageBlend" --><!-- doxytag: inherits="vtkThreadedImageAlgorithm" --><code>#include <<a class="el" href="a04668.html">vtkImageBlend.h</a>></code>
<p>
<div class="dynheader">
Inheritance diagram for vtkImageBlend:</div>
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<p><center><img src="a10704.png" border="0" usemap="#a10705" alt="Inheritance graph"></center>
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<area shape="rect" href="a01705.html" title="Generic filter that has one input.." alt="" coords="5,304,200,331"><area shape="rect" href="a00727.html" title="Generic algorithm superclass for image algs." alt="" coords="35,230,171,256"><area shape="rect" href="a00101.html" title="Superclass for all sources, filters, and sinks in VTK." alt="" coords="53,155,152,182"><area shape="rect" href="a01084.html" title="abstract base class for most VTK objects" alt="" coords="63,80,143,107"><area shape="rect" href="a01085.html" title="abstract base class for most VTK objects" alt="" coords="48,6,157,32"></map>
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Collaboration diagram for vtkImageBlend:</div>
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<area shape="rect" href="a01705.html" title="Generic filter that has one input.." alt="" coords="710,590,904,616"><area shape="rect" href="a00727.html" title="Generic algorithm superclass for image algs." alt="" coords="627,499,763,526"><area shape="rect" href="a00101.html" title="Superclass for all sources, filters, and sinks in VTK." alt="" coords="414,382,512,408"><area shape="rect" href="a00472.html" title="Superclass for all pipeline executives in VTK." alt="" coords="423,499,522,526"><area shape="rect" href="a01084.html" title="abstract base class for most VTK objects" alt="" coords="408,174,488,200"><area shape="rect" href="a00895.html" title="Store zero or more vtkInformation instances." alt="" coords="479,264,628,291"><area shape="rect" href="a00872.html" title="Store vtkAlgorithm input/output information." alt="" coords="155,264,264,291"><area shape="rect" href="a01064.html" title="A class for performing multithreaded execution." alt="" coords="796,499,922,526"><area shape="rect" href="a01074.html" title="mutual exclusion locking class" alt="" coords="866,264,972,291"><area shape="rect" href="a01085.html" title="abstract base class for most VTK objects" alt="" coords="164,6,274,32"><area shape="rect" href="a00884.html" title="internal structure for vtkInformation" alt="" coords="6,174,168,200"><area shape="rect" href="a00886.html" title="Superclass for vtkInformation keys." alt="" coords="154,83,284,110"><area shape="rect" href="a01719.html" title="record modification and/or execution time" alt="" coords="308,83,418,110"><area shape="rect" href="a00891.html" title="Key for pointer to pointer." alt="" coords="192,174,374,200"><area shape="rect" href="a01065.html" title="vtkMultiThreader::ThreadInfo" alt="" coords="1106,382,1306,408"><area shape="rect" href="a01552.html" title="vtkSimpleMutexLock" alt="" coords="846,174,992,200"></map>
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<p>
<a href="a10708.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>
blend images together using alpha or opacity
<p>
<a class="el" href="a00732.html" title="blend images together using alpha or opacity">vtkImageBlend</a> takes L, LA, RGB, or RGBA images as input and blends them according to the alpha values and/or the opacity setting for each input.<p>
The spacing, origin, extent, and number of components of the output are the same as those for the first input. If the input has an alpha component, then this component is copied unchanged into the output. In addition, if the first input has either one component or two components i.e. if it is either L (greyscale) or LA (greyscale + alpha) then all other inputs must also be L or LA.<p>
Different blending modes are available:<p>
<em>Normal</em> (default) : This is the standard blending mode used by OpenGL and other graphics packages. The output always has the same number of components and the same extent as the first input. The alpha value of the first input is not used in the blending computation, instead it is copied directly to the output.<p>
<div class="fragment"><pre class="fragment"> output <- input[0]
<span class="keywordflow">foreach</span> input i {
<span class="keywordflow">foreach</span> pixel px {
r <- input[i](px)(<a class="code" href="a03761.html#c6551f7bf833e8254b2b3ecdaea0d210a6028180e112c2c1c3556a8253cdbff5">alpha</a>) * opacity[i]
f <- (255 - r)
output(px) <- output(px) * f + input(px) * r
}
}
</pre></div><p>
<em>Compound</em> : Images are compounded together and each component is scaled by the sum of the alpha/opacity values. Use the CompoundThreshold method to set specify a threshold in compound mode. Pixels with opacity*alpha less or equal than this threshold are ignored. The alpha value of the first input, if present, is NOT copied to the alpha value of the output. The output always has the same number of components and the same extent as the first input.<p>
<div class="fragment"><pre class="fragment"> output <- 0
<span class="keywordflow">foreach</span> pixel px {
sum <- 0
<span class="keywordflow">foreach</span> input i {
r <- input[i](px)(<a class="code" href="a03761.html#c6551f7bf833e8254b2b3ecdaea0d210a6028180e112c2c1c3556a8253cdbff5">alpha</a>) * opacity(i)
sum <- sum + r
if r > threshold {
output(px) <- output(px) + input(px) * r
}
}
output(px) <- output(px) / sum
}
</pre></div><p>
<dl class="user" compact><dt><b>Tests:</b></dt><dd><a class="el" href="c2_vtk_t_8.html#c2_vtk_t_vtkImageBlend">vtkImageBlend (Tests)</a> </dd></dl>
<p>Definition at line <a class="el" href="a04668.html#l00087">87</a> of file <a class="el" href="a04668.html">vtkImageBlend.h</a>.</p>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef <a class="el" href="a01705.html">vtkThreadedImageAlgorithm</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#b9d5b1d74ebd4d999447793bedf63742">Superclass</a></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#98362a7aa0dd153d697750789b342acf">GetClassName</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#7169ca512acc159733889fe8345eec91">IsA</a> (const char *type)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#815355a3ebf24b3e029d0503a170e9cf">PrintSelf</a> (ostream &os, <a class="el" href="a00869.html">vtkIndent</a> indent)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#202f04bbf50804b9e3c4ad96bd78a22b">ReplaceNthInputConnection</a> (int idx, <a class="el" href="a00102.html">vtkAlgorithmOutput</a> *input)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#c7cc4cb31431302598019b049bb05302">GetNumberOfInputs</a> ()</td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#83ee02c7ba5a28dd181acf594059c10a">SetInput</a> (int num, <a class="el" href="a00362.html">vtkDataObject</a> *input)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#b10cdbda97e8366edf0c8c2dbb84d9b6">SetInput</a> (<a class="el" href="a00362.html">vtkDataObject</a> *input)</td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="a00362.html">vtkDataObject</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#c52e5a1e2e962fd31f53a685aec5b846">GetInput</a> (int num)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="a00362.html">vtkDataObject</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#a9fdef018bdd9c23c8b882bc7cfcbdf2">GetInput</a> ()</td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#180c208d1f45e2ff273ec5289527353e">SetOpacity</a> (int idx, double opacity)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#cf20a52722c46a0d6a5c6581ffebc7eb">GetOpacity</a> (int idx)</td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#6190d6864da2a4d543fea38dff4fb999">SetStencil</a> (<a class="el" href="a00836.html">vtkImageStencilData</a> *stencil)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="a00836.html">vtkImageStencilData</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#1f771452da3f6ec511aa02f40467b675">GetStencil</a> ()</td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#2b11131277c3e3ff44e9b493d3a042e1">SetBlendMode</a> (int)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#f4d1f9075b097541603f25d6065eb6c9">GetBlendMode</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#0ec4a1513064bcdd88b02af2c745ddcf">SetBlendModeToNormal</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#23443447d1a34244d1d41bcb18d21b12">SetBlendModeToCompound</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#37da58aaf35b2445888dadd30627e90c">GetBlendModeAsString</a> (void)</td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#3dfa5ae099ee18cc846fc3032749793c">SetCompoundThreshold</a> (double)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual double </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#d001dddb6729d1080797be1afd3c1171">GetCompoundThreshold</a> ()</td></tr>
<tr><td colspan="2"><br><h2>Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="a00732.html">vtkImageBlend</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#202d918f50952f0161faf7c3e5e2d6bf">New</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#b16f54789f56b6971538ee45ce7dc5b2">IsTypeOf</a> (const char *type)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="a00732.html">vtkImageBlend</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#f50ee08ec9df917f7b208b2bb817923f">SafeDownCast</a> (<a class="el" href="a01084.html">vtkObject</a> *o)</td></tr>
<tr><td colspan="2"><br><h2>Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#2826b24f0d43a2c511823664c1d3ffff">vtkImageBlend</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#7b790d288badcb82f5f176831a6f6d70">~vtkImageBlend</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#a74dbe1ff0386353cde710be25583cf7">RequestUpdateExtent</a> (<a class="el" href="a00872.html">vtkInformation</a> *, <a class="el" href="a00895.html">vtkInformationVector</a> **, <a class="el" href="a00895.html">vtkInformationVector</a> *)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#42593b2129e8ff2f3e4bf8c9bf4a0b72">InternalComputeInputUpdateExtent</a> (int inExt[6], int outExt[6], int inWExtent[6])</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#d4fac56ef0b0c197f8dba493fb4a3c81">RequestInformation</a> (<a class="el" href="a00872.html">vtkInformation</a> *, <a class="el" href="a00895.html">vtkInformationVector</a> **, <a class="el" href="a00895.html">vtkInformationVector</a> *)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#898caf3528e8f1af8f443551cdd986d6">ThreadedRequestData</a> (<a class="el" href="a00872.html">vtkInformation</a> *request, <a class="el" href="a00895.html">vtkInformationVector</a> **inputVector, <a class="el" href="a00895.html">vtkInformationVector</a> *outputVector, <a class="el" href="a00751.html">vtkImageData</a> ***inData, <a class="el" href="a00751.html">vtkImageData</a> **outData, int ext[6], int id)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#0744bb8a18f49c158785a918f3500d6f">FillInputPortInformation</a> (int, <a class="el" href="a00872.html">vtkInformation</a> *)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#500f2f53f4d8ee0463cbf23f0da01925">RequestData</a> (<a class="el" href="a00872.html">vtkInformation</a> *request, <a class="el" href="a00895.html">vtkInformationVector</a> **inputVector, <a class="el" href="a00895.html">vtkInformationVector</a> *outputVector)</td></tr>
<tr><td colspan="2"><br><h2>Protected Attributes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">double * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#c8d65e7f89aa0e4076cdc4fc45f4a66e">Opacity</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#7caf27a5fd0b0425a97994b01f5d0764">OpacityArrayLength</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#361611584dd336390bbdda3f9d3b2f54">BlendMode</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#af9d53d1a706aa1154e8ae2211fa9ab9">CompoundThreshold</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00732.html#7233a37202f10301f3c54666141a28d1">DataWasPassed</a></td></tr>
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<hr><h2>Member Typedef Documentation</h2>
<a class="anchor" name="b9d5b1d74ebd4d999447793bedf63742"></a><!-- doxytag: member="vtkImageBlend::Superclass" ref="b9d5b1d74ebd4d999447793bedf63742" args="" -->
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<td class="memname">typedef <a class="el" href="a01705.html">vtkThreadedImageAlgorithm</a> <a class="el" href="a01705.html">vtkImageBlend::Superclass</a> </td>
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<p>Reimplemented from <a class="el" href="a01705.html#67876177e53dbc18f91b9b50f8f03331">vtkThreadedImageAlgorithm</a>.</p>
<p>Definition at line <a class="el" href="a04668.html#l00091">91</a> of file <a class="el" href="a04668.html">vtkImageBlend.h</a>.</p>
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<hr><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" name="2826b24f0d43a2c511823664c1d3ffff"></a><!-- doxytag: member="vtkImageBlend::vtkImageBlend" ref="2826b24f0d43a2c511823664c1d3ffff" args="()" -->
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<td class="memname">vtkImageBlend::vtkImageBlend </td>
<td>(</td>
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<td> ) </td>
<td><code> [protected]</code></td>
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</div>
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<a class="anchor" name="7b790d288badcb82f5f176831a6f6d70"></a><!-- doxytag: member="vtkImageBlend::~vtkImageBlend" ref="7b790d288badcb82f5f176831a6f6d70" args="()" -->
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<td class="memname">vtkImageBlend::~vtkImageBlend </td>
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<td><code> [protected]</code></td>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="202d918f50952f0161faf7c3e5e2d6bf"></a><!-- doxytag: member="vtkImageBlend::New" ref="202d918f50952f0161faf7c3e5e2d6bf" args="()" -->
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<td class="memname">static <a class="el" href="a00732.html">vtkImageBlend</a>* vtkImageBlend::New </td>
<td>(</td>
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<td><code> [static]</code></td>
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Create an object with Debug turned off, modified time initialized to zero, and reference counting on.
<p>Reimplemented from <a class="el" href="a00101.html#06d80d8d4aa1a4856135fa003845be82">vtkAlgorithm</a>.</p>
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<a class="anchor" name="98362a7aa0dd153d697750789b342acf"></a><!-- doxytag: member="vtkImageBlend::GetClassName" ref="98362a7aa0dd153d697750789b342acf" args="()" -->
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<td class="memname">virtual const char* vtkImageBlend::GetClassName </td>
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<td><code> [virtual]</code></td>
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<p>Reimplemented from <a class="el" href="a01705.html#8622c920af18a6521f427d7b70613faa">vtkThreadedImageAlgorithm</a>.</p>
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<a class="anchor" name="b16f54789f56b6971538ee45ce7dc5b2"></a><!-- doxytag: member="vtkImageBlend::IsTypeOf" ref="b16f54789f56b6971538ee45ce7dc5b2" args="(const char *type)" -->
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<td class="memname">static int vtkImageBlend::IsTypeOf </td>
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Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeRevisionMacro found in vtkSetGet.h.
<p>Reimplemented from <a class="el" href="a01705.html#1e20b0feec3712e39d352e47d582ff4e">vtkThreadedImageAlgorithm</a>.</p>
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<a class="anchor" name="7169ca512acc159733889fe8345eec91"></a><!-- doxytag: member="vtkImageBlend::IsA" ref="7169ca512acc159733889fe8345eec91" args="(const char *type)" -->
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<td class="memname">virtual int vtkImageBlend::IsA </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>name</em> </td>
<td> ) </td>
<td><code> [virtual]</code></td>
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<p>
Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeRevisionMacro found in vtkSetGet.h.
<p>Reimplemented from <a class="el" href="a01705.html#250ac29fa902a270b6f94702f7f24e9b">vtkThreadedImageAlgorithm</a>.</p>
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<a class="anchor" name="f50ee08ec9df917f7b208b2bb817923f"></a><!-- doxytag: member="vtkImageBlend::SafeDownCast" ref="f50ee08ec9df917f7b208b2bb817923f" args="(vtkObject *o)" -->
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<td class="memname">static <a class="el" href="a00732.html">vtkImageBlend</a>* vtkImageBlend::SafeDownCast </td>
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<td class="paramtype"><a class="el" href="a01084.html">vtkObject</a> * </td>
<td class="paramname"> <em>o</em> </td>
<td> ) </td>
<td><code> [static]</code></td>
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<p>Reimplemented from <a class="el" href="a01705.html#def8b2b0abda015b495884db6f717625">vtkThreadedImageAlgorithm</a>.</p>
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<a class="anchor" name="815355a3ebf24b3e029d0503a170e9cf"></a><!-- doxytag: member="vtkImageBlend::PrintSelf" ref="815355a3ebf24b3e029d0503a170e9cf" args="(ostream &os, vtkIndent indent)" -->
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<td class="memname">void vtkImageBlend::PrintSelf </td>
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<td class="paramkey"></td>
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<td class="paramtype"><a class="el" href="a00869.html">vtkIndent</a> </td>
<td class="paramname"> <em>indent</em></td><td> </td>
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<td></td><td></td><td><code> [virtual]</code></td>
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Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use <a class="el" href="a01085.html#edadf6378465fd81c2592ef64262e2a5">Print()</a> instead) but used in the hierarchical print process to combine the output of several classes.
<p>Reimplemented from <a class="el" href="a01705.html#53dc14a03ab6cffae0ca5cadb2c6d172">vtkThreadedImageAlgorithm</a>.</p>
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<a class="anchor" name="202f04bbf50804b9e3c4ad96bd78a22b"></a><!-- doxytag: member="vtkImageBlend::ReplaceNthInputConnection" ref="202f04bbf50804b9e3c4ad96bd78a22b" args="(int idx, vtkAlgorithmOutput *input)" -->
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<td class="memname">virtual void vtkImageBlend::ReplaceNthInputConnection </td>
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<td class="paramname"> <em>input</em></td><td> </td>
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<td></td><td></td><td><code> [virtual]</code></td>
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Replace one of the input connections with a new input. You can only replace input connections that you previously created with <a class="el" href="a00101.html#fea437e12d98e7745874708990d1dee0">AddInputConnection()</a> or, in the case of the first input, with <a class="el" href="a00101.html#ac26b4138f0e8c07e45c74571f2c51a3">SetInputConnection()</a>.
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<a class="anchor" name="83ee02c7ba5a28dd181acf594059c10a"></a><!-- doxytag: member="vtkImageBlend::SetInput" ref="83ee02c7ba5a28dd181acf594059c10a" args="(int num, vtkDataObject *input)" -->
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<td class="memname">void vtkImageBlend::SetInput </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"> <em>num</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype"><a class="el" href="a00362.html">vtkDataObject</a> * </td>
<td class="paramname"> <em>input</em></td><td> </td>
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Set an Input of this filter. This method is only for support of old-style pipeline connections. When writing new code you should use <a class="el" href="a00101.html#ac26b4138f0e8c07e45c74571f2c51a3">SetInputConnection()</a>, <a class="el" href="a00101.html#fea437e12d98e7745874708990d1dee0">AddInputConnection()</a>, and <a class="el" href="a00732.html#202f04bbf50804b9e3c4ad96bd78a22b">ReplaceNthInputConnection()</a> instead.
<p>Reimplemented from <a class="el" href="a00727.html#770305e5850f97783baf2ab44e1d40d7">vtkImageAlgorithm</a>.</p>
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<a class="anchor" name="b10cdbda97e8366edf0c8c2dbb84d9b6"></a><!-- doxytag: member="vtkImageBlend::SetInput" ref="b10cdbda97e8366edf0c8c2dbb84d9b6" args="(vtkDataObject *input)" -->
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<td class="memname">void vtkImageBlend::SetInput </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00362.html">vtkDataObject</a> * </td>
<td class="paramname"> <em>input</em> </td>
<td> ) </td>
<td><code> [inline]</code></td>
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<p>
Set an Input of this filter. This method is only for support of old-style pipeline connections. When writing new code you should use <a class="el" href="a00101.html#ac26b4138f0e8c07e45c74571f2c51a3">SetInputConnection()</a>, <a class="el" href="a00101.html#fea437e12d98e7745874708990d1dee0">AddInputConnection()</a>, and <a class="el" href="a00732.html#202f04bbf50804b9e3c4ad96bd78a22b">ReplaceNthInputConnection()</a> instead.
<p>Reimplemented from <a class="el" href="a00727.html#29e467d314fb2efafb134cc11a8796a5">vtkImageAlgorithm</a>.</p>
<p>Definition at line <a class="el" href="a04668.html#l00106">106</a> of file <a class="el" href="a04668.html">vtkImageBlend.h</a>.</p>
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<a class="anchor" name="c52e5a1e2e962fd31f53a685aec5b846"></a><!-- doxytag: member="vtkImageBlend::GetInput" ref="c52e5a1e2e962fd31f53a685aec5b846" args="(int num)" -->
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<td class="memname"><a class="el" href="a00362.html">vtkDataObject</a>* vtkImageBlend::GetInput </td>
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Get one input to this filter. This method is only for support of old-style pipeline connections. When writing new code you should use vtkAlgorithm::GetInputConnection(0, num).
<p>Reimplemented from <a class="el" href="a00727.html#fcdc7acde7396d0e69db5e815f26773b">vtkImageAlgorithm</a>.</p>
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<a class="anchor" name="a9fdef018bdd9c23c8b882bc7cfcbdf2"></a><!-- doxytag: member="vtkImageBlend::GetInput" ref="a9fdef018bdd9c23c8b882bc7cfcbdf2" args="()" -->
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<td class="memname"><a class="el" href="a00362.html">vtkDataObject</a>* vtkImageBlend::GetInput </td>
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<td><code> [inline]</code></td>
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Get one input to this filter. This method is only for support of old-style pipeline connections. When writing new code you should use vtkAlgorithm::GetInputConnection(0, num).
<p>Reimplemented from <a class="el" href="a00727.html#06615baee9e1b31fce3417191acae50b">vtkImageAlgorithm</a>.</p>
<p>Definition at line <a class="el" href="a04668.html#l00114">114</a> of file <a class="el" href="a04668.html">vtkImageBlend.h</a>.</p>
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<a class="anchor" name="c7cc4cb31431302598019b049bb05302"></a><!-- doxytag: member="vtkImageBlend::GetNumberOfInputs" ref="c7cc4cb31431302598019b049bb05302" args="()" -->
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<td class="memname">int vtkImageBlend::GetNumberOfInputs </td>
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Get the number of inputs to this filter. This method is only for support of old-style pipeline connections. When writing new code you should use vtkAlgorithm::GetNumberOfInputConnections(0).
<p>Definition at line <a class="el" href="a04668.html#l00120">120</a> of file <a class="el" href="a04668.html">vtkImageBlend.h</a>.</p>
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<a class="anchor" name="180c208d1f45e2ff273ec5289527353e"></a><!-- doxytag: member="vtkImageBlend::SetOpacity" ref="180c208d1f45e2ff273ec5289527353e" args="(int idx, double opacity)" -->
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<td class="memname">void vtkImageBlend::SetOpacity </td>
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<td class="paramname"> <em>opacity</em></td><td> </td>
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Set the opacity of an input image: the alpha values of the image are multiplied by the opacity. The opacity of image idx=0 is ignored.
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<a class="anchor" name="cf20a52722c46a0d6a5c6581ffebc7eb"></a><!-- doxytag: member="vtkImageBlend::GetOpacity" ref="cf20a52722c46a0d6a5c6581ffebc7eb" args="(int idx)" -->
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<td class="memname">double vtkImageBlend::GetOpacity </td>
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Set the opacity of an input image: the alpha values of the image are multiplied by the opacity. The opacity of image idx=0 is ignored.
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<a class="anchor" name="6190d6864da2a4d543fea38dff4fb999"></a><!-- doxytag: member="vtkImageBlend::SetStencil" ref="6190d6864da2a4d543fea38dff4fb999" args="(vtkImageStencilData *stencil)" -->
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<td class="memname">void vtkImageBlend::SetStencil </td>
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<td class="paramname"> <em>stencil</em> </td>
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Set a stencil to apply when blending the data.
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<a class="anchor" name="1f771452da3f6ec511aa02f40467b675"></a><!-- doxytag: member="vtkImageBlend::GetStencil" ref="1f771452da3f6ec511aa02f40467b675" args="()" -->
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<td class="memname"><a class="el" href="a00836.html">vtkImageStencilData</a>* vtkImageBlend::GetStencil </td>
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Set a stencil to apply when blending the data.
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<a class="anchor" name="2b11131277c3e3ff44e9b493d3a042e1"></a><!-- doxytag: member="vtkImageBlend::SetBlendMode" ref="2b11131277c3e3ff44e9b493d3a042e1" args="(int)" -->
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<td class="memname">virtual void vtkImageBlend::SetBlendMode </td>
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<td><code> [virtual]</code></td>
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Set the blend mode
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<a class="anchor" name="f4d1f9075b097541603f25d6065eb6c9"></a><!-- doxytag: member="vtkImageBlend::GetBlendMode" ref="f4d1f9075b097541603f25d6065eb6c9" args="()" -->
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<td class="memname">virtual int vtkImageBlend::GetBlendMode </td>
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Set the blend mode
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<a class="anchor" name="0ec4a1513064bcdd88b02af2c745ddcf"></a><!-- doxytag: member="vtkImageBlend::SetBlendModeToNormal" ref="0ec4a1513064bcdd88b02af2c745ddcf" args="()" -->
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<td class="memname">void vtkImageBlend::SetBlendModeToNormal </td>
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Set the blend mode
<p>Definition at line <a class="el" href="a04668.html#l00141">141</a> of file <a class="el" href="a04668.html">vtkImageBlend.h</a>.</p>
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<a class="anchor" name="23443447d1a34244d1d41bcb18d21b12"></a><!-- doxytag: member="vtkImageBlend::SetBlendModeToCompound" ref="23443447d1a34244d1d41bcb18d21b12" args="()" -->
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<td class="memname">void vtkImageBlend::SetBlendModeToCompound </td>
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Set the blend mode
<p>Definition at line <a class="el" href="a04668.html#l00143">143</a> of file <a class="el" href="a04668.html">vtkImageBlend.h</a>.</p>
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<a class="anchor" name="37da58aaf35b2445888dadd30627e90c"></a><!-- doxytag: member="vtkImageBlend::GetBlendModeAsString" ref="37da58aaf35b2445888dadd30627e90c" args="(void)" -->
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<td class="memname">const char * vtkImageBlend::GetBlendModeAsString </td>
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Get the blending mode as a descriptive string
<p>Definition at line <a class="el" href="a04668.html#l00198">198</a> of file <a class="el" href="a04668.html">vtkImageBlend.h</a>.</p>
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<a class="anchor" name="3dfa5ae099ee18cc846fc3032749793c"></a><!-- doxytag: member="vtkImageBlend::SetCompoundThreshold" ref="3dfa5ae099ee18cc846fc3032749793c" args="(double)" -->
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<td class="memname">virtual void vtkImageBlend::SetCompoundThreshold </td>
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Specify a threshold in compound mode. Pixels with opacity*alpha less or equal the threshold are ignored.
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<a class="anchor" name="d001dddb6729d1080797be1afd3c1171"></a><!-- doxytag: member="vtkImageBlend::GetCompoundThreshold" ref="d001dddb6729d1080797be1afd3c1171" args="()" -->
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<td class="memname">virtual double vtkImageBlend::GetCompoundThreshold </td>
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<td><code> [virtual]</code></td>
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Specify a threshold in compound mode. Pixels with opacity*alpha less or equal the threshold are ignored.
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<a class="anchor" name="a74dbe1ff0386353cde710be25583cf7"></a><!-- doxytag: member="vtkImageBlend::RequestUpdateExtent" ref="a74dbe1ff0386353cde710be25583cf7" args="(vtkInformation *, vtkInformationVector **, vtkInformationVector *)" -->
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<p>Reimplemented from <a class="el" href="a00727.html#442e91c5e549f40acffb0941846cb047">vtkImageAlgorithm</a>.</p>
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<a class="anchor" name="42593b2129e8ff2f3e4bf8c9bf4a0b72"></a><!-- doxytag: member="vtkImageBlend::InternalComputeInputUpdateExtent" ref="42593b2129e8ff2f3e4bf8c9bf4a0b72" args="(int inExt[6], int outExt[6], int inWExtent[6])" -->
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<td class="paramname"> <em>outExt</em>[6], </td>
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<td class="paramname"> <em>inWExtent</em>[6]</td><td> </td>
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<a class="anchor" name="d4fac56ef0b0c197f8dba493fb4a3c81"></a><!-- doxytag: member="vtkImageBlend::RequestInformation" ref="d4fac56ef0b0c197f8dba493fb4a3c81" args="(vtkInformation *, vtkInformationVector **, vtkInformationVector *)" -->
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<p>Reimplemented from <a class="el" href="a00727.html#b739abd84881f7e31a8a382bf5a06a91">vtkImageAlgorithm</a>.</p>
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<a class="anchor" name="898caf3528e8f1af8f443551cdd986d6"></a><!-- doxytag: member="vtkImageBlend::ThreadedRequestData" ref="898caf3528e8f1af8f443551cdd986d6" args="(vtkInformation *request, vtkInformationVector **inputVector, vtkInformationVector *outputVector, vtkImageData ***inData, vtkImageData **outData, int ext[6], int id)" -->
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<td class="memname">void vtkImageBlend::ThreadedRequestData </td>
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<td class="paramtype"><a class="el" href="a00872.html">vtkInformation</a> * </td>
<td class="paramname"> <em>request</em>, </td>
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<td class="paramtype"><a class="el" href="a00895.html">vtkInformationVector</a> ** </td>
<td class="paramname"> <em>inputVector</em>, </td>
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<td class="paramtype"><a class="el" href="a00895.html">vtkInformationVector</a> * </td>
<td class="paramname"> <em>outputVector</em>, </td>
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<td class="paramtype"><a class="el" href="a00751.html">vtkImageData</a> *** </td>
<td class="paramname"> <em>inData</em>, </td>
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<td class="paramtype"><a class="el" href="a00751.html">vtkImageData</a> ** </td>
<td class="paramname"> <em>outData</em>, </td>
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<td class="paramtype">int </td>
<td class="paramname"> <em>extent</em>[6], </td>
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<td class="paramtype">int </td>
<td class="paramname"> <em>threadId</em></td><td> </td>
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<td></td><td></td><td><code> [protected, virtual]</code></td>
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If the subclass does not define an Execute method, then the task will be broken up, multiple threads will be spawned, and each thread will call this method. It is public so that the thread functions can call this method.
<p>Reimplemented from <a class="el" href="a01705.html#dda52b8ad4b703ee11c76b916accbb42">vtkThreadedImageAlgorithm</a>.</p>
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<a class="anchor" name="0744bb8a18f49c158785a918f3500d6f"></a><!-- doxytag: member="vtkImageBlend::FillInputPortInformation" ref="0744bb8a18f49c158785a918f3500d6f" args="(int, vtkInformation *)" -->
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<td class="memname">virtual int vtkImageBlend::FillInputPortInformation </td>
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<td class="paramtype"><a class="el" href="a00872.html">vtkInformation</a> * </td>
<td class="paramname"> <em>info</em></td><td> </td>
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<td></td><td></td><td><code> [protected, virtual]</code></td>
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Fill the input port information objects for this algorithm. This is invoked by the first call to GetInputPortInformation for each port so subclasses can specify what they can handle.
<p>Reimplemented from <a class="el" href="a00727.html#7abefdbb585c2e27ebc314c894c87f74">vtkImageAlgorithm</a>.</p>
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<a class="anchor" name="500f2f53f4d8ee0463cbf23f0da01925"></a><!-- doxytag: member="vtkImageBlend::RequestData" ref="500f2f53f4d8ee0463cbf23f0da01925" args="(vtkInformation *request, vtkInformationVector **inputVector, vtkInformationVector *outputVector)" -->
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<td class="memname">virtual int vtkImageBlend::RequestData </td>
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<td class="paramtype"><a class="el" href="a00872.html">vtkInformation</a> * </td>
<td class="paramname"> <em>request</em>, </td>
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<td class="paramtype"><a class="el" href="a00895.html">vtkInformationVector</a> ** </td>
<td class="paramname"> <em>inputVector</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="a00895.html">vtkInformationVector</a> * </td>
<td class="paramname"> <em>outputVector</em></td><td> </td>
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<td>)</td>
<td></td><td></td><td><code> [protected, virtual]</code></td>
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This is called by the superclass. This is the method you should override.
<p>Reimplemented from <a class="el" href="a01705.html#cb47f24e52706df6a7d2ded8266d2b23">vtkThreadedImageAlgorithm</a>.</p>
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<hr><h2>Member Data Documentation</h2>
<a class="anchor" name="c8d65e7f89aa0e4076cdc4fc45f4a66e"></a><!-- doxytag: member="vtkImageBlend::Opacity" ref="c8d65e7f89aa0e4076cdc4fc45f4a66e" args="" -->
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<td class="memname">double* <a class="el" href="a00732.html#c8d65e7f89aa0e4076cdc4fc45f4a66e">vtkImageBlend::Opacity</a><code> [protected]</code> </td>
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<p>Definition at line <a class="el" href="a04668.html#l00186">186</a> of file <a class="el" href="a04668.html">vtkImageBlend.h</a>.</p>
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<a class="anchor" name="7caf27a5fd0b0425a97994b01f5d0764"></a><!-- doxytag: member="vtkImageBlend::OpacityArrayLength" ref="7caf27a5fd0b0425a97994b01f5d0764" args="" -->
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<td class="memname">int <a class="el" href="a00732.html#7caf27a5fd0b0425a97994b01f5d0764">vtkImageBlend::OpacityArrayLength</a><code> [protected]</code> </td>
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<p>Definition at line <a class="el" href="a04668.html#l00187">187</a> of file <a class="el" href="a04668.html">vtkImageBlend.h</a>.</p>
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<a class="anchor" name="361611584dd336390bbdda3f9d3b2f54"></a><!-- doxytag: member="vtkImageBlend::BlendMode" ref="361611584dd336390bbdda3f9d3b2f54" args="" -->
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<td class="memname">int <a class="el" href="a00732.html#361611584dd336390bbdda3f9d3b2f54">vtkImageBlend::BlendMode</a><code> [protected]</code> </td>
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<p>Definition at line <a class="el" href="a04668.html#l00188">188</a> of file <a class="el" href="a04668.html">vtkImageBlend.h</a>.</p>
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<a class="anchor" name="af9d53d1a706aa1154e8ae2211fa9ab9"></a><!-- doxytag: member="vtkImageBlend::CompoundThreshold" ref="af9d53d1a706aa1154e8ae2211fa9ab9" args="" -->
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<td class="memname">double <a class="el" href="a00732.html#af9d53d1a706aa1154e8ae2211fa9ab9">vtkImageBlend::CompoundThreshold</a><code> [protected]</code> </td>
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<p>Definition at line <a class="el" href="a04668.html#l00189">189</a> of file <a class="el" href="a04668.html">vtkImageBlend.h</a>.</p>
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<a class="anchor" name="7233a37202f10301f3c54666141a28d1"></a><!-- doxytag: member="vtkImageBlend::DataWasPassed" ref="7233a37202f10301f3c54666141a28d1" args="" -->
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<td class="memname">int <a class="el" href="a00732.html#7233a37202f10301f3c54666141a28d1">vtkImageBlend::DataWasPassed</a><code> [protected]</code> </td>
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<p>Definition at line <a class="el" href="a04668.html#l00190">190</a> of file <a class="el" href="a04668.html">vtkImageBlend.h</a>.</p>
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<hr>The documentation for this class was generated from the following file:<ul>
<li>dox/Imaging/<a class="el" href="a04668.html">vtkImageBlend.h</a></ul>
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<hr size="1"><address style="text-align: right;"><small>Generated on Wed Jun 3 19:08:34 2009 for VTK by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.6 </small></address>
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