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| <a href="#libvips-transform.synopsis" class="shortcut">Top</a> |
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| <a href="#libvips-transform.description" class="shortcut">Description</a> |
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| <div class="refentry" title="transform"> |
| <a name="libvips-transform"></a><div class="titlepage"></div> |
| <div class="refnamediv"><table width="100%"><tr> |
| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="libvips-transform.top_of_page"></a>transform</span></h2> |
| <p>transform</p> |
| </td> |
| <td valign="top" align="right"></td> |
| </tr></table></div> |
| <div class="refsynopsisdiv" title="Synopsis"> |
| <a name="libvips-transform.synopsis"></a><h2>Synopsis</h2> |
| <pre class="synopsis"> <a class="link" href="libvips-transform.html#Transformation" title="Transformation">Transformation</a>; |
| <span class="returnvalue">void</span> <a class="link" href="libvips-transform.html#im--transform-init" title="im__transform_init ()">im__transform_init</a> (<em class="parameter"><code><a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>); |
| <span class="returnvalue">int</span> <a class="link" href="libvips-transform.html#im--transform-calc-inverse" title="im__transform_calc_inverse ()">im__transform_calc_inverse</a> (<em class="parameter"><code><a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>); |
| <span class="returnvalue">int</span> <a class="link" href="libvips-transform.html#im--transform-isidentity" title="im__transform_isidentity ()">im__transform_isidentity</a> (<em class="parameter"><code>const <a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>); |
| <span class="returnvalue">int</span> <a class="link" href="libvips-transform.html#im--transform-add" title="im__transform_add ()">im__transform_add</a> (<em class="parameter"><code>const <a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *in1</code></em>, |
| <em class="parameter"><code>const <a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *in2</code></em>, |
| <em class="parameter"><code><a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *out</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="libvips-transform.html#im--transform-print" title="im__transform_print ()">im__transform_print</a> (<em class="parameter"><code>const <a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="libvips-transform.html#im--transform-forward-point" title="im__transform_forward_point ()">im__transform_forward_point</a> (<em class="parameter"><code>const <a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>, |
| <em class="parameter"><code>const <span class="type">double</span> x</code></em>, |
| <em class="parameter"><code>const <span class="type">double</span> y</code></em>, |
| <em class="parameter"><code><span class="type">double</span> *ox</code></em>, |
| <em class="parameter"><code><span class="type">double</span> *oy</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="libvips-transform.html#im--transform-invert-point" title="im__transform_invert_point ()">im__transform_invert_point</a> (<em class="parameter"><code>const <a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>, |
| <em class="parameter"><code>const <span class="type">double</span> x</code></em>, |
| <em class="parameter"><code>const <span class="type">double</span> y</code></em>, |
| <em class="parameter"><code><span class="type">double</span> *ox</code></em>, |
| <em class="parameter"><code><span class="type">double</span> *oy</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="libvips-transform.html#im--transform-forward-rect" title="im__transform_forward_rect ()">im__transform_forward_rect</a> (<em class="parameter"><code>const <a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>, |
| <em class="parameter"><code>const <a class="link" href="libvips-rect.html#Rect" title="Rect"><span class="type">Rect</span></a> *in</code></em>, |
| <em class="parameter"><code><a class="link" href="libvips-rect.html#Rect" title="Rect"><span class="type">Rect</span></a> *out</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="libvips-transform.html#im--transform-invert-rect" title="im__transform_invert_rect ()">im__transform_invert_rect</a> (<em class="parameter"><code>const <a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>, |
| <em class="parameter"><code>const <a class="link" href="libvips-rect.html#Rect" title="Rect"><span class="type">Rect</span></a> *in</code></em>, |
| <em class="parameter"><code><a class="link" href="libvips-rect.html#Rect" title="Rect"><span class="type">Rect</span></a> *out</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="libvips-transform.html#im--transform-set-area" title="im__transform_set_area ()">im__transform_set_area</a> (<em class="parameter"><code><a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *Param1</code></em>); |
| <span class="returnvalue">int</span> <a class="link" href="libvips-transform.html#im--affine" title="im__affine ()">im__affine</a> (<em class="parameter"><code><span class="type">IMAGE</span> *in</code></em>, |
| <em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>, |
| <em class="parameter"><code><a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>); |
| </pre> |
| </div> |
| <div class="refsect1" title="Description"> |
| <a name="libvips-transform.description"></a><h2>Description</h2> |
| </div> |
| <div class="refsect1" title="Details"> |
| <a name="libvips-transform.details"></a><h2>Details</h2> |
| <div class="refsect2" title="Transformation"> |
| <a name="Transformation"></a><h3>Transformation</h3> |
| <pre class="programlisting">typedef struct { |
| /* Area of input we can use. This can be smaller than the real input |
| * image: we expand the input to add extra pixels for interpolation. |
| */ |
| Rect iarea; |
| |
| /* The area of the output we've been asked to generate. left/top can |
| * be negative. |
| */ |
| Rect oarea; |
| |
| /* The transform. |
| */ |
| double a, b, c, d; |
| double dx, dy; |
| |
| double ia, ib, ic, id; /* Inverse of matrix abcd */ |
| } Transformation; |
| </pre> |
| </div> |
| <hr> |
| <div class="refsect2" title="im__transform_init ()"> |
| <a name="im--transform-init"></a><h3>im__transform_init ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> im__transform_init (<em class="parameter"><code><a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>);</pre> |
| </div> |
| <hr> |
| <div class="refsect2" title="im__transform_calc_inverse ()"> |
| <a name="im--transform-calc-inverse"></a><h3>im__transform_calc_inverse ()</h3> |
| <pre class="programlisting"><span class="returnvalue">int</span> im__transform_calc_inverse (<em class="parameter"><code><a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>);</pre> |
| </div> |
| <hr> |
| <div class="refsect2" title="im__transform_isidentity ()"> |
| <a name="im--transform-isidentity"></a><h3>im__transform_isidentity ()</h3> |
| <pre class="programlisting"><span class="returnvalue">int</span> im__transform_isidentity (<em class="parameter"><code>const <a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>);</pre> |
| </div> |
| <hr> |
| <div class="refsect2" title="im__transform_add ()"> |
| <a name="im--transform-add"></a><h3>im__transform_add ()</h3> |
| <pre class="programlisting"><span class="returnvalue">int</span> im__transform_add (<em class="parameter"><code>const <a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *in1</code></em>, |
| <em class="parameter"><code>const <a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *in2</code></em>, |
| <em class="parameter"><code><a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *out</code></em>);</pre> |
| </div> |
| <hr> |
| <div class="refsect2" title="im__transform_print ()"> |
| <a name="im--transform-print"></a><h3>im__transform_print ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> im__transform_print (<em class="parameter"><code>const <a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>);</pre> |
| </div> |
| <hr> |
| <div class="refsect2" title="im__transform_forward_point ()"> |
| <a name="im--transform-forward-point"></a><h3>im__transform_forward_point ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> im__transform_forward_point (<em class="parameter"><code>const <a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>, |
| <em class="parameter"><code>const <span class="type">double</span> x</code></em>, |
| <em class="parameter"><code>const <span class="type">double</span> y</code></em>, |
| <em class="parameter"><code><span class="type">double</span> *ox</code></em>, |
| <em class="parameter"><code><span class="type">double</span> *oy</code></em>);</pre> |
| </div> |
| <hr> |
| <div class="refsect2" title="im__transform_invert_point ()"> |
| <a name="im--transform-invert-point"></a><h3>im__transform_invert_point ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> im__transform_invert_point (<em class="parameter"><code>const <a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>, |
| <em class="parameter"><code>const <span class="type">double</span> x</code></em>, |
| <em class="parameter"><code>const <span class="type">double</span> y</code></em>, |
| <em class="parameter"><code><span class="type">double</span> *ox</code></em>, |
| <em class="parameter"><code><span class="type">double</span> *oy</code></em>);</pre> |
| </div> |
| <hr> |
| <div class="refsect2" title="im__transform_forward_rect ()"> |
| <a name="im--transform-forward-rect"></a><h3>im__transform_forward_rect ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> im__transform_forward_rect (<em class="parameter"><code>const <a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>, |
| <em class="parameter"><code>const <a class="link" href="libvips-rect.html#Rect" title="Rect"><span class="type">Rect</span></a> *in</code></em>, |
| <em class="parameter"><code><a class="link" href="libvips-rect.html#Rect" title="Rect"><span class="type">Rect</span></a> *out</code></em>);</pre> |
| </div> |
| <hr> |
| <div class="refsect2" title="im__transform_invert_rect ()"> |
| <a name="im--transform-invert-rect"></a><h3>im__transform_invert_rect ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> im__transform_invert_rect (<em class="parameter"><code>const <a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>, |
| <em class="parameter"><code>const <a class="link" href="libvips-rect.html#Rect" title="Rect"><span class="type">Rect</span></a> *in</code></em>, |
| <em class="parameter"><code><a class="link" href="libvips-rect.html#Rect" title="Rect"><span class="type">Rect</span></a> *out</code></em>);</pre> |
| </div> |
| <hr> |
| <div class="refsect2" title="im__transform_set_area ()"> |
| <a name="im--transform-set-area"></a><h3>im__transform_set_area ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> im__transform_set_area (<em class="parameter"><code><a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *Param1</code></em>);</pre> |
| </div> |
| <hr> |
| <div class="refsect2" title="im__affine ()"> |
| <a name="im--affine"></a><h3>im__affine ()</h3> |
| <pre class="programlisting"><span class="returnvalue">int</span> im__affine (<em class="parameter"><code><span class="type">IMAGE</span> *in</code></em>, |
| <em class="parameter"><code><span class="type">IMAGE</span> *out</code></em>, |
| <em class="parameter"><code><a class="link" href="libvips-transform.html#Transformation" title="Transformation"><span class="type">Transformation</span></a> *trn</code></em>);</pre> |
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