creating.sgml

This GTK+ version 2.12.3. GTK+ is a multi-platform toolkit for creating graphical user interfaces.

<!-- ##### 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: 


<!-- ##### 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:
-->