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<!-- ##### SECTION Title ##### -->
Image Data in Memory
<!-- ##### SECTION Short_Description ##### -->
Creating a pixbuf from image data that is already in memory.
<!-- ##### SECTION Long_Description ##### -->
<para>
The most basic way to create a pixbuf is to wrap an existing pixel
buffer with a #GdkPixbuf structure. You can use the
gdk_pixbuf_new_from_data() function to do this You need to specify
the destroy notification function that will be called when the
data buffer needs to be freed; this will happen when a #GdkPixbuf
is finalized by the reference counting functions If you have a
chunk of static data compiled into your application, you can pass
in %NULL as the destroy notification function so that the data
will not be freed.
</para>
<para>
The gdk_pixbuf_new() function can be used as a convenience to
create a pixbuf with an empty buffer. This is equivalent to
allocating a data buffer using <function>malloc()</function> and
then wrapping it with gdk_pixbuf_new_from_data(). The gdk_pixbuf_new()
function will compute an optimal rowstride so that rendering can be
performed with an efficient algorithm.
</para>
<para>
As a special case, you can use the gdk_pixbuf_new_from_xpm_data()
function to create a pixbuf from inline XPM image data.
</para>
<para>
You can also copy an existing pixbuf with the gdk_pixbuf_copy()
function. This is not the same as just doing a g_object_ref()
on the old pixbuf; the copy function will actually duplicate the
pixel data in memory and create a new #GdkPixbuf structure for it.
</para>
<!-- ##### SECTION See_Also ##### -->
<para>
gdk_pixbuf_finalize().
</para>
<!-- ##### SECTION Stability_Level ##### -->
<!-- ##### FUNCTION gdk_pixbuf_new ##### -->
<para>
</para>
@colorspace:
@has_alpha:
@bits_per_sample:
@width:
@height:
@Returns:
<!-- ##### FUNCTION gdk_pixbuf_new_from_data ##### -->
<para>
</para>
@data:
@colorspace:
@has_alpha:
@bits_per_sample:
@width:
@height:
@rowstride:
@destroy_fn:
@destroy_fn_data:
@Returns:
<!-- ##### FUNCTION gdk_pixbuf_new_from_xpm_data ##### -->
<para>
</para>
@data:
@Returns:
<!-- ##### FUNCTION gdk_pixbuf_new_from_inline ##### -->
<para>
</para>
@data_length:
@data:
@copy_pixels:
@error:
@Returns:
<!-- # Unused Parameters # -->
@inline_pixbuf:
@length:
<!-- ##### FUNCTION gdk_pixbuf_new_subpixbuf ##### -->
<para>
</para>
@src_pixbuf:
@src_x:
@src_y:
@width:
@height:
@Returns:
<!-- ##### FUNCTION gdk_pixbuf_copy ##### -->
<para>
</para>
@pixbuf:
@Returns: <!--
Local variables:
mode: sgml
sgml-parent-document: ("../gdk-pixbuf.sgml" "book" "refsect2" "")
End:
-->
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