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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<a href="#cairo-Win32-Surfaces.description" class="shortcut">Description</a>
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<div class="refentry" title="Win32 Surfaces">
<a name="cairo-Win32-Surfaces"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="cairo-Win32-Surfaces.top_of_page"></a>Win32 Surfaces</span></h2>
<p>Win32 Surfaces — Microsoft Windows surface support</p>
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<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv" title="Synopsis">
<a name="cairo-Win32-Surfaces.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">#define <a class="link" href="cairo-Win32-Surfaces.html#CAIRO-HAS-WIN32-SURFACE:CAPS" title="CAIRO_HAS_WIN32_SURFACE">CAIRO_HAS_WIN32_SURFACE</a>
<a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="returnvalue">cairo_surface_t</span></a> * <a class="link" href="cairo-Win32-Surfaces.html#cairo-win32-surface-create" title="cairo_win32_surface_create ()">cairo_win32_surface_create</a> (<em class="parameter"><code><span class="type">HDC</span> hdc</code></em>);
<a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="returnvalue">cairo_surface_t</span></a> * <a class="link" href="cairo-Win32-Surfaces.html#cairo-win32-surface-create-with-dib" title="cairo_win32_surface_create_with_dib ()">cairo_win32_surface_create_with_dib</a> (<em class="parameter"><code><a class="link" href="cairo-Image-Surfaces.html#cairo-format-t" title="enum cairo_format_t"><span class="type">cairo_format_t</span></a> format</code></em>,
<em class="parameter"><code><span class="type">int</span> width</code></em>,
<em class="parameter"><code><span class="type">int</span> height</code></em>);
<a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="returnvalue">cairo_surface_t</span></a> * <a class="link" href="cairo-Win32-Surfaces.html#cairo-win32-surface-create-with-ddb" title="cairo_win32_surface_create_with_ddb ()">cairo_win32_surface_create_with_ddb</a> (<em class="parameter"><code><span class="type">HDC</span> hdc</code></em>,
<em class="parameter"><code><a class="link" href="cairo-Image-Surfaces.html#cairo-format-t" title="enum cairo_format_t"><span class="type">cairo_format_t</span></a> format</code></em>,
<em class="parameter"><code><span class="type">int</span> width</code></em>,
<em class="parameter"><code><span class="type">int</span> height</code></em>);
<a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="returnvalue">cairo_surface_t</span></a> * <a class="link" href="cairo-Win32-Surfaces.html#cairo-win32-printing-surface-create" title="cairo_win32_printing_surface_create ()">cairo_win32_printing_surface_create</a> (<em class="parameter"><code><span class="type">HDC</span> hdc</code></em>);
<span class="returnvalue">HDC</span> <a class="link" href="cairo-Win32-Surfaces.html#cairo-win32-surface-get-dc" title="cairo_win32_surface_get_dc ()">cairo_win32_surface_get_dc</a> (<em class="parameter"><code><a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="type">cairo_surface_t</span></a> *surface</code></em>);
<a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="returnvalue">cairo_surface_t</span></a> * <a class="link" href="cairo-Win32-Surfaces.html#cairo-win32-surface-get-image" title="cairo_win32_surface_get_image ()">cairo_win32_surface_get_image</a> (<em class="parameter"><code><a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="type">cairo_surface_t</span></a> *surface</code></em>);
</pre>
</div>
<div class="refsect1" title="Description">
<a name="cairo-Win32-Surfaces.description"></a><h2>Description</h2>
<p>
The Microsoft Windows surface is used to render cairo graphics to
Microsoft Windows windows, bitmaps, and printing device contexts.
</p>
<p>
The surface returned by <a class="link" href="cairo-Win32-Surfaces.html#cairo-win32-printing-surface-create" title="cairo_win32_printing_surface_create ()"><code class="function">cairo_win32_printing_surface_create()</code></a> is of surface
type <a class="link" href="cairo-cairo-surface-t.html#CAIRO-SURFACE-TYPE-WIN32-PRINTING:CAPS"><code class="literal">CAIRO_SURFACE_TYPE_WIN32_PRINTING</code></a> and is a multi-page vector surface
type.
</p>
<p>
The surface returned by the other win32 constructors is of surface type
<a class="link" href="cairo-cairo-surface-t.html#CAIRO-SURFACE-TYPE-WIN32:CAPS"><code class="literal">CAIRO_SURFACE_TYPE_WIN32</code></a> and is a raster surface type.
</p>
</div>
<div class="refsect1" title="Details">
<a name="cairo-Win32-Surfaces.details"></a><h2>Details</h2>
<div class="refsect2" title="CAIRO_HAS_WIN32_SURFACE">
<a name="CAIRO-HAS-WIN32-SURFACE:CAPS"></a><h3>CAIRO_HAS_WIN32_SURFACE</h3>
<pre class="programlisting">#define CAIRO_HAS_WIN32_SURFACE</pre>
<p>
Defined if the Microsoft Windows surface backend is available.
This macro can be used to conditionally compile backend-specific code.
</p>
</div>
<hr>
<div class="refsect2" title="cairo_win32_surface_create ()">
<a name="cairo-win32-surface-create"></a><h3>cairo_win32_surface_create ()</h3>
<pre class="programlisting"><a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="returnvalue">cairo_surface_t</span></a> * cairo_win32_surface_create (<em class="parameter"><code><span class="type">HDC</span> hdc</code></em>);</pre>
<p>
Creates a cairo surface that targets the given DC. The DC will be
queried for its initial clip extents, and this will be used as the
size of the cairo surface. The resulting surface will always be of
format <a class="link" href="cairo-Image-Surfaces.html#CAIRO-FORMAT-RGB24:CAPS"><code class="literal">CAIRO_FORMAT_RGB24</code></a>; should you need another surface format,
you will need to create one through
<a class="link" href="cairo-Win32-Surfaces.html#cairo-win32-surface-create-with-dib" title="cairo_win32_surface_create_with_dib ()"><code class="function">cairo_win32_surface_create_with_dib()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>hdc</code></em> :</span></p></td>
<td>the DC to create a surface for
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> the newly created surface
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="cairo_win32_surface_create_with_dib ()">
<a name="cairo-win32-surface-create-with-dib"></a><h3>cairo_win32_surface_create_with_dib ()</h3>
<pre class="programlisting"><a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="returnvalue">cairo_surface_t</span></a> * cairo_win32_surface_create_with_dib (<em class="parameter"><code><a class="link" href="cairo-Image-Surfaces.html#cairo-format-t" title="enum cairo_format_t"><span class="type">cairo_format_t</span></a> format</code></em>,
<em class="parameter"><code><span class="type">int</span> width</code></em>,
<em class="parameter"><code><span class="type">int</span> height</code></em>);</pre>
<p>
Creates a device-independent-bitmap surface not associated with
any particular existing surface or device context. The created
bitmap will be uninitialized.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td>
<td>format of pixels in the surface to create
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td>width of the surface, in pixels
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
<td>height of the surface, in pixels
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> the newly created surface
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.2</p>
</div>
<hr>
<div class="refsect2" title="cairo_win32_surface_create_with_ddb ()">
<a name="cairo-win32-surface-create-with-ddb"></a><h3>cairo_win32_surface_create_with_ddb ()</h3>
<pre class="programlisting"><a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="returnvalue">cairo_surface_t</span></a> * cairo_win32_surface_create_with_ddb (<em class="parameter"><code><span class="type">HDC</span> hdc</code></em>,
<em class="parameter"><code><a class="link" href="cairo-Image-Surfaces.html#cairo-format-t" title="enum cairo_format_t"><span class="type">cairo_format_t</span></a> format</code></em>,
<em class="parameter"><code><span class="type">int</span> width</code></em>,
<em class="parameter"><code><span class="type">int</span> height</code></em>);</pre>
<p>
Creates a device-independent-bitmap surface not associated with
any particular existing surface or device context. The created
bitmap will be uninitialized.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>hdc</code></em> :</span></p></td>
<td>the DC to create a surface for
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td>
<td>format of pixels in the surface to create
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td>width of the surface, in pixels
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
<td>height of the surface, in pixels
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> the newly created surface
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
<hr>
<div class="refsect2" title="cairo_win32_printing_surface_create ()">
<a name="cairo-win32-printing-surface-create"></a><h3>cairo_win32_printing_surface_create ()</h3>
<pre class="programlisting"><a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="returnvalue">cairo_surface_t</span></a> * cairo_win32_printing_surface_create (<em class="parameter"><code><span class="type">HDC</span> hdc</code></em>);</pre>
<p>
Creates a cairo surface that targets the given DC. The DC will be
queried for its initial clip extents, and this will be used as the
size of the cairo surface. The DC should be a printing DC;
antialiasing will be ignored, and GDI will be used as much as
possible to draw to the surface.
</p>
<p>
The returned surface will be wrapped using the paginated surface to
provide correct complex rendering behaviour; <a class="link" href="cairo-cairo-surface-t.html#cairo-surface-show-page" title="cairo_surface_show_page ()"><code class="function">cairo_surface_show_page()</code></a> and
associated methods must be used for correct output.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>hdc</code></em> :</span></p></td>
<td>the DC to create a surface for
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> the newly created surface
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.6</p>
</div>
<hr>
<div class="refsect2" title="cairo_win32_surface_get_dc ()">
<a name="cairo-win32-surface-get-dc"></a><h3>cairo_win32_surface_get_dc ()</h3>
<pre class="programlisting"><span class="returnvalue">HDC</span> cairo_win32_surface_get_dc (<em class="parameter"><code><a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="type">cairo_surface_t</span></a> *surface</code></em>);</pre>
<p>
Returns the HDC associated with this surface, or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if none.
Also returns <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if the surface is not a win32 surface.
</p>
<p>
A call to <a class="link" href="cairo-cairo-surface-t.html#cairo-surface-flush" title="cairo_surface_flush ()"><code class="function">cairo_surface_flush()</code></a> is required before using the HDC to
ensure that all pending drawing operations are finished and to
restore any temporary modification cairo has made to its state. A
call to <a class="link" href="cairo-cairo-surface-t.html#cairo-surface-mark-dirty" title="cairo_surface_mark_dirty ()"><code class="function">cairo_surface_mark_dirty()</code></a> is required after the state or
the content of the HDC has been modified.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>surface</code></em> :</span></p></td>
<td>a <a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="type">cairo_surface_t</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> HDC or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if no HDC available.
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.2</p>
</div>
<hr>
<div class="refsect2" title="cairo_win32_surface_get_image ()">
<a name="cairo-win32-surface-get-image"></a><h3>cairo_win32_surface_get_image ()</h3>
<pre class="programlisting"><a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="returnvalue">cairo_surface_t</span></a> * cairo_win32_surface_get_image (<em class="parameter"><code><a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="type">cairo_surface_t</span></a> *surface</code></em>);</pre>
<p>
Returns a <a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="type">cairo_surface_t</span></a> image surface that refers to the same bits
as the DIB of the Win32 surface. If the passed-in win32 surface
is not a DIB surface, <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> is returned.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>surface</code></em> :</span></p></td>
<td>a <a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="type">cairo_surface_t</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> a <a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="type">cairo_surface_t</span></a> (owned by the win32 <a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="type">cairo_surface_t</span></a>),
or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if the win32 surface is not a DIB.
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
</div>
<div class="refsect1" title="See Also">
<a name="cairo-Win32-Surfaces.see-also"></a><h2>See Also</h2>
<a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="type">cairo_surface_t</span></a>
</div>
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