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<title>Adds a curve</title>
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<h1 class="refname">CairoContext::curveTo</h1>
<h1 class="refname">cairo_curve_to</h1>
<p class="verinfo">(PECL cairo >= 0.1.0)</p><p class="refpurpose"><span class="refname">CairoContext::curveTo</span> -- <span class="refname">cairo_curve_to</span> — <span class="dc-title">Adds a curve</span></p>
</div>
<div class="refsect1 description" id="refsect1-cairocontext.curveto-description">
<h3 class="title">Description</h3>
<p class="para">Object oriented style (method):</p>
<div class="methodsynopsis dc-description">
<span class="modifier">public</span> <span class="type"><span class="type void">void</span></span> <span class="methodname"><strong>CairoContext::curveTo</strong></span>
( <span class="methodparam"><span class="type">float</span> <code class="parameter">$x1</code></span>
, <span class="methodparam"><span class="type">float</span> <code class="parameter">$y1</code></span>
, <span class="methodparam"><span class="type">float</span> <code class="parameter">$x2</code></span>
, <span class="methodparam"><span class="type">float</span> <code class="parameter">$y2</code></span>
, <span class="methodparam"><span class="type">float</span> <code class="parameter">$x3</code></span>
, <span class="methodparam"><span class="type">float</span> <code class="parameter">$y3</code></span>
)</div>
<p class="para rdfs-comment">Procedural style:</p>
<div class="methodsynopsis dc-description">
<span class="type"><span class="type void">void</span></span> <span class="methodname"><strong>cairo_curve_to</strong></span>
( <span class="methodparam"><span class="type"><a href="class.cairocontext.html" class="type CairoContext">CairoContext</a></span> <code class="parameter">$context</code></span>
, <span class="methodparam"><span class="type">float</span> <code class="parameter">$x1</code></span>
, <span class="methodparam"><span class="type">float</span> <code class="parameter">$y1</code></span>
, <span class="methodparam"><span class="type">float</span> <code class="parameter">$x2</code></span>
, <span class="methodparam"><span class="type">float</span> <code class="parameter">$y2</code></span>
, <span class="methodparam"><span class="type">float</span> <code class="parameter">$x3</code></span>
, <span class="methodparam"><span class="type">float</span> <code class="parameter">$y3</code></span>
)</div>
<p class="para rdfs-comment">
Adds a cubic Bezier spline to the path from the current point to position <em><code class="parameter">x3</code></em>
,<em><code class="parameter">y3</code></em> in user-space coordinates, using <em><code class="parameter">x1</code></em>,
<em><code class="parameter">y1</code></em> and <em><code class="parameter">x2</code></em>, <em><code class="parameter">y2</code></em> as the control
points. After this call the current point will be <em><code class="parameter">x3</code></em>, <em><code class="parameter">y3</code></em>.
</p>
<p class="para">
If there is no current point before the call to <span class="methodname"><strong>CairoContext::curveTo()</strong></span>
this function will behave as if preceded by a call to <span class="methodname"><a href="cairocontext.moveto.html" class="methodname">CairoContext::moveTo()</a></span>
(<em><code class="parameter">x1</code></em>, <em><code class="parameter">y1</code></em>).
</p>
</div>
<div class="refsect1 parameters" id="refsect1-cairocontext.curveto-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">context</code></em></span>
<dd>
<p class="para">
A valid <a href="class.cairocontext.html" class="classname">CairoContext</a> object created with
<span class="methodname"><a href="cairocontext.construct.html" class="methodname">CairoContext::__construct()</a></span> or <span class="function"><a href="function.cairo-create.html" class="function">cairo_create()</a></span>
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">x1</code></em></span>
<dd>
<p class="para">
First control point in the x axis for the curve
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">y1</code></em></span>
<dd>
<p class="para">
First control point in the y axis for the curve
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">x2</code></em></span>
<dd>
<p class="para">
Second control point in x axis for the curve
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">y2</code></em></span>
<dd>
<p class="para">
Second control point in y axis for the curve
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">x3</code></em></span>
<dd>
<p class="para">
Final point in the x axis for the curve
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">y3</code></em></span>
<dd>
<p class="para">
Final point in the y axis for the curve
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-cairocontext.curveto-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
No value is returned.
</p>
</div>
<div class="refsect1 examples" id="refsect1-cairocontext.curveto-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-2869">
<p><strong>Example #1 Object oriented style</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$s </span><span style="color: #007700">= new </span><span style="color: #0000BB">CairoImageSurface</span><span style="color: #007700">(</span><span style="color: #0000BB">CairoFormat</span><span style="color: #007700">::</span><span style="color: #0000BB">ARGB32</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$c </span><span style="color: #007700">= new </span><span style="color: #0000BB">CairoContext</span><span style="color: #007700">(</span><span style="color: #0000BB">$s</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$c</span><span style="color: #007700">-></span><span style="color: #0000BB">setSourceRgb</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$c</span><span style="color: #007700">-></span><span style="color: #0000BB">paint</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">$c</span><span style="color: #007700">-></span><span style="color: #0000BB">moveTo</span><span style="color: #007700">(</span><span style="color: #0000BB">10</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">); <br /></span><span style="color: #0000BB">$c</span><span style="color: #007700">-></span><span style="color: #0000BB">setLineWidth</span><span style="color: #007700">(</span><span style="color: #0000BB">5</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$c</span><span style="color: #007700">-></span><span style="color: #0000BB">setSourceRgb</span><span style="color: #007700">(</span><span style="color: #0000BB">.1</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$c</span><span style="color: #007700">-></span><span style="color: #0000BB">curveTo</span><span style="color: #007700">(</span><span style="color: #0000BB">20</span><span style="color: #007700">, </span><span style="color: #0000BB">80</span><span style="color: #007700">, </span><span style="color: #0000BB">80</span><span style="color: #007700">, </span><span style="color: #0000BB">20</span><span style="color: #007700">, </span><span style="color: #0000BB">90</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">); <br /></span><span style="color: #0000BB">$c</span><span style="color: #007700">-></span><span style="color: #0000BB">stroke</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">$s</span><span style="color: #007700">-></span><span style="color: #0000BB">writeToPng</span><span style="color: #007700">(</span><span style="color: #0000BB">dirname</span><span style="color: #007700">(</span><span style="color: #0000BB">__FILE__</span><span style="color: #007700">) . </span><span style="color: #DD0000">'/curveTo.png'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
<p class="para">
<div class="example" id="example-2870">
<p><strong>Example #2 Procedural style</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /><br />$s </span><span style="color: #007700">= </span><span style="color: #0000BB">cairo_image_surface_create</span><span style="color: #007700">(</span><span style="color: #0000BB">CAIRO_SURFACE_TYPE_IMAGE</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$c </span><span style="color: #007700">= </span><span style="color: #0000BB">cairo_create</span><span style="color: #007700">(</span><span style="color: #0000BB">$s</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">cairo_set_source_rgb</span><span style="color: #007700">(</span><span style="color: #0000BB">$c</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">cairo_paint</span><span style="color: #007700">(</span><span style="color: #0000BB">$c</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">cairo_move_to</span><span style="color: #007700">(</span><span style="color: #0000BB">$c</span><span style="color: #007700">, </span><span style="color: #0000BB">10</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">cairo_set_line_width</span><span style="color: #007700">(</span><span style="color: #0000BB">$c</span><span style="color: #007700">, </span><span style="color: #0000BB">5</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">cairo_set_source_rgb</span><span style="color: #007700">(</span><span style="color: #0000BB">$c</span><span style="color: #007700">, </span><span style="color: #0000BB">.1</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">cairo_curve_to</span><span style="color: #007700">(</span><span style="color: #0000BB">$c</span><span style="color: #007700">, </span><span style="color: #0000BB">20</span><span style="color: #007700">, </span><span style="color: #0000BB">80</span><span style="color: #007700">, </span><span style="color: #0000BB">80</span><span style="color: #007700">, </span><span style="color: #0000BB">20</span><span style="color: #007700">, </span><span style="color: #0000BB">90</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">cairo_stroke</span><span style="color: #007700">(</span><span style="color: #0000BB">$c</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">cairo_surface_write_to_png</span><span style="color: #007700">(</span><span style="color: #0000BB">$s</span><span style="color: #007700">, </span><span style="color: #0000BB">dirname</span><span style="color: #007700">(</span><span style="color: #0000BB">__FILE__</span><span style="color: #007700">) . </span><span style="color: #DD0000">'/curve_to.png'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-cairocontext.curveto-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="methodname"><a href="cairocontext.moveto.html" class="methodname" rel="rdfs-seeAlso">CairoContext::moveTo()</a> - The moveTo purpose</span></li>
</ul>
</p>
</div>
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