<!-- ##### SECTION Title ##### -->Images<!-- ##### SECTION Short_Description ##### -->A client-side area for bit-mapped graphics<!-- ##### SECTION Long_Description ##### --><para>The #GdkImage type represents an area for drawing graphics.It has now been superceded to a large extent by the much more flexible<link linkend="gdk-GdkRGB">GdkRGB</link> functions.</para><para>To create an empty #GdkImage use gdk_image_new().To create a #GdkImage from bitmap data use gdk_image_new_bitmap().To create an image from part of a #GdkWindow use gdk_drawable_get_image().</para><para>The image can be manipulated with gdk_image_get_pixel() andgdk_image_put_pixel(), or alternatively by changing the actual pixel data.Though manipulating the pixel data requires complicated code to cope withthe different formats that may be used.</para><para>To draw a #GdkImage in a #GdkWindow or #GdkPixmap use gdk_draw_image().</para><para>To destroy a #GdkImage use gdk_image_destroy().</para><!-- ##### SECTION See_Also ##### --><para><variablelist><varlistentry><term><link linkend="gdk-Bitmaps-and-Pixmaps">Bitmaps and Pixmaps</link></term><listitem><para>Graphics which are stored on the X Windows server.Since these are stored on the server they can be drawn very quickly, and allof the <link linkend="gdk-Drawing-Primitives">Drawing Primitives</link> can beused to draw on them. Their main disadvantage is that manipulating individualpixels can be very slow.</para></listitem></varlistentry><varlistentry><term><link linkend="gdk-GdkRGB">GdkRGB</link></term><listitem><para>Built on top of #GdkImage, this provides much more functionality,including the dithering of colors to produce better output on low-colordisplays.</para></listitem></varlistentry></variablelist></para><!-- ##### SECTION Stability_Level ##### --><!-- ##### STRUCT GdkImage ##### --><para>The #GdkImage struct contains information on the image and the pixel data.</para>@parent_instance: the parent instance@type: the type of the image.@visual: the visual.@byte_order: the byte order.@width: the width of the image in pixels.@height: the height of the image in pixels.@depth: the depth of the image, i.e. the number of bits per pixel.@bpp: the number of bytes per pixel.@bpl: the number of bytes per line of the image.@bits_per_pixel: the number of bits per pixel.@mem: the pixel data.@colormap: the #GdkColormap associated with the image<!-- ##### FUNCTION gdk_image_new ##### --><para>Creates a new #GdkImage.</para>@type: the type of the #GdkImage, one of %GDK_IMAGE_NORMAL, %GDK_IMAGE_SHAREDand %GDK_IMAGE_FASTEST. %GDK_IMAGE_FASTEST is probably the best choice, sinceit will try creating a %GDK_IMAGE_SHARED image first and if that fails it willthen use %GDK_IMAGE_NORMAL.@visual: the #GdkVisual to use for the image.@width: the width of the image in pixels.@height: the height of the image in pixels.@Returns: a new #GdkImage, or %NULL if the image could not be created.<!-- ##### ENUM GdkImageType ##### --><para>Specifies the type of a #GdkImage.</para>@GDK_IMAGE_NORMAL: The original X image type, which is quite slow since theimage has to be transferred from the client to the server to display it.@GDK_IMAGE_SHARED: A faster image type, which uses shared memory to transferthe image data between client and server. However this will only be availableif client and server are on the same machine and the shared memory extensionis supported by the server.@GDK_IMAGE_FASTEST: Specifies that %GDK_IMAGE_SHARED should be tried first,and if that fails then %GDK_IMAGE_NORMAL will be used.<!-- ##### FUNCTION gdk_image_new_bitmap ##### --><para></para>@visual: @data: @width: @height: @Returns: <!-- ##### FUNCTION gdk_image_get ##### --><para></para>@drawable: @x: @y: @width: @height: @Returns: <!-- ##### FUNCTION gdk_image_ref ##### --><para></para>@image: @Returns: <!-- ##### FUNCTION gdk_image_unref ##### --><para></para>@image: <!-- ##### MACRO gdk_image_destroy ##### --><para>Destroys a #GdkImage, freeing any resources allocated for it.</para><!-- # Unused Parameters # -->@image: a #GdkImage.<!-- ##### FUNCTION gdk_image_get_colormap ##### --><para></para>@image: @Returns: <!-- ##### FUNCTION gdk_image_set_colormap ##### --><para></para>@image: @colormap: <!-- ##### FUNCTION gdk_image_put_pixel ##### --><para>Sets a pixel in a #GdkImage to a given pixel value.</para>@image: a #GdkImage.@x: the x coordinate of the pixel to set.@y: the y coordinate of the pixel to set.@pixel: the pixel value to set.<!-- ##### FUNCTION gdk_image_get_pixel ##### --><para>Gets a pixel value at a specified position in a #GdkImage.</para>@image: a #GdkImage.@x: the x coordinate of the pixel to get.@y: the y coordinate of the pixel to get.@Returns: the pixel value at the given position.