/*
 * This file is part of gtkD.
 *
 * gtkD is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version, with
 * some exceptions, please read the COPYING file.
 *
 * gtkD is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with gtkD; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
 */

// generated automatically - do not change
// find conversion definition on APILookup.txt
// implement new conversion functionalities on the wrap.utils pakage


module gdkpixbuf.Pixbuf;

private import gdkpixbuf.PixbufFormat;
private import gdkpixbuf.Pixdata;
private import gdkpixbuf.c.functions;
public  import gdkpixbuf.c.types;
private import gio.AsyncResultIF;
private import gio.Cancellable;
private import gio.IconIF;
private import gio.IconT;
private import gio.InputStream;
private import gio.LoadableIconIF;
private import gio.LoadableIconT;
private import gio.OutputStream;
private import glib.Bytes;
private import glib.ConstructionException;
private import glib.ErrorG;
private import glib.GException;
private import glib.HashTable;
private import glib.ListSG;
private import glib.Str;
private import gobject.ObjectG;
public  import gtkc.gdkpixbuftypes;


/**
 * This is the main structure in the gdk-pixbuf library.  It is
 * used to represent images.  It contains information about the
 * image's pixel data, its color space, bits per sample, width and
 * height, and the rowstride (the number of bytes between the start of
 * one row and the start of the next).
 */
public class Pixbuf : ObjectG, IconIF, LoadableIconIF
{
	/** the main Gtk struct */
	protected GdkPixbuf* gdkPixbuf;

	/** Get the main Gtk struct */
	public GdkPixbuf* getPixbufStruct(bool transferOwnership = false)
	{
		if (transferOwnership)
			ownedRef = false;
		return gdkPixbuf;
	}

	/** the main Gtk struct as a void* */
	protected override void* getStruct()
	{
		return cast(void*)gdkPixbuf;
	}

	protected override void setStruct(GObject* obj)
	{
		gdkPixbuf = cast(GdkPixbuf*)obj;
		super.setStruct(obj);
	}

	/**
	 * Sets our main struct and passes it to the parent class.
	 */
	public this (GdkPixbuf* gdkPixbuf, bool ownedRef = false)
	{
		this.gdkPixbuf = gdkPixbuf;
		super(cast(GObject*)gdkPixbuf, ownedRef);
	}

	// add the Icon capabilities
	mixin IconT!(GdkPixbuf);

	// add the LoadableIcon capabilities
	mixin LoadableIconT!(GdkPixbuf);

	/**
	 * Saves pixbuf to a new buffer in format @type, which is currently "jpeg",
	 * "tiff", "png", "ico" or "bmp".  See gdk_pixbuf_save_to_buffer()
	 * for more details.
	 *
	 * Params:
	 *     buffer = location to receive a pointer to the new buffer.
	 *     bufferSize = location to receive the size of the new buffer.
	 *     type = name of file format.
	 *     optionKeys = name of options to set, %NULL-terminated
	 *     optionValues = values for named options
	 *
	 * Return: whether an error was set
	 *
	 * Since: 2.4
	 *
	 * Throws: GException on failure.
	 */
	public bool saveToBuffer(out ubyte[] buffer, string type, string[] optionKeys, string[] optionValues)
	{
		char* outbuffer = null;
		size_t bufferSize;
		GError* err = null;

		auto p = gdk_pixbuf_save_to_bufferv(gdkPixbuf, &outbuffer, &bufferSize, Str.toStringz(type), Str.toStringzArray(optionKeys), Str.toStringzArray(optionValues), &err) != 0;

		if (err !is null)
		{
			throw new GException( new ErrorG(err) );
		}

		buffer = (cast(ubyte*)outbuffer)[0 .. bufferSize];

		return p;
	}

	/**
	 * Creates a new pixbuf by loading an image from an resource.
	 *
	 * The file format is detected automatically.
	 *
	 * Params:
	 *     resourcePath = the path of the resource file
	 *
	 * Return: A newly-created pixbuf, or null if any of several error
	 *     conditions occurred: the file could not be opened, the image format is
	 *     not supported, there was not enough memory to allocate the image buffer,
	 *     the stream contained invalid data, or the operation was cancelled.
	 *
	 * Since: 2.26
	 *
	 * Throws: GException on failure.
	 */
	public static Pixbuf newFromResource(string resourcePath)
	{
		GError* err = null;

		auto p = gdk_pixbuf_new_from_resource(Str.toStringz(resourcePath), &err);

		if (err !is null)
		{
			throw new GException( new ErrorG(err) );
		}

		return new Pixbuf(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Creates a new pixbuf by loading an image from an resource.
	 *
	 * The file format is detected automatically.
	 *
	 * The image will be scaled to fit in the requested size, optionally
	 * preserving the image's aspect ratio. When preserving the aspect ratio,
	 * a width of -1 will cause the image to be scaled to the exact given
	 * height, and a height of -1 will cause the image to be scaled to the
	 * exact given width. When not preserving aspect ratio, a width or
	 * height of -1 means to not scale the image at all in that dimension.
	 *
	 * The stream is not closed.
	 *
	 * Params:
	 *     resourcePath = the path of the resource file
	 *     width = The width the image should have or -1 to not constrain the width
	 *     height = The height the image should have or -1 to not constrain the height
	 *     preserveAspectRatio = true to preserve the image's aspect ratio
	 *
	 * Return: A newly-created pixbuf, or null if any of several error
	 *     conditions occurred: the file could not be opened, the image format is
	 *     not supported, there was not enough memory to allocate the image buffer,
	 *     the stream contained invalid data, or the operation was cancelled.
	 *
	 * Since: 2.26
	 *
	 * Throws: GException on failure.
	 */
	public static Pixbuf newFromResource(string resourcePath, int width, int height, bool preserveAspectRatio)
	{
		GError* err = null;

		auto p = gdk_pixbuf_new_from_resource_at_scale(Str.toStringz(resourcePath), width, height, preserveAspectRatio, &err);

		if (err !is null)
		{
			throw new GException( new ErrorG(err) );
		}

		return new Pixbuf(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Queries a pointer to the pixel data of a pixbuf.
	 *
	 * Return: A pointer to the pixbuf's pixel data.
	 *     Please see the section on [image data](image-data) for information
	 *     about how the pixel data is stored in memory.
	 *
	 *     This function will cause an implicit copy of the pixbuf data if the
	 *     pixbuf was created from read-only data.
	 */
	public char* getPixels()
	{
		return gdk_pixbuf_get_pixels(gdkPixbuf);
	}

	/**
	 */

	/** */
	public static GType getType()
	{
		return gdk_pixbuf_get_type();
	}

	/**
	 * Creates a new #GdkPixbuf structure and allocates a buffer for it.  The
	 * buffer has an optimal rowstride.  Note that the buffer is not cleared;
	 * you will have to fill it completely yourself.
	 *
	 * Params:
	 *     colorspace = Color space for image
	 *     hasAlpha = Whether the image should have transparency information
	 *     bitsPerSample = Number of bits per color sample
	 *     width = Width of image in pixels, must be > 0
	 *     height = Height of image in pixels, must be > 0
	 *
	 * Returns: A newly-created #GdkPixbuf with a reference count of 1, or
	 *     %NULL if not enough memory could be allocated for the image buffer.
	 *
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(GdkColorspace colorspace, bool hasAlpha, int bitsPerSample, int width, int height)
	{
		auto p = gdk_pixbuf_new(colorspace, hasAlpha, bitsPerSample, width, height);

		if(p is null)
		{
			throw new ConstructionException("null returned by new");
		}

		this(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Creates a new #GdkPixbuf out of in-memory readonly image data.
	 * Currently only RGB images with 8 bits per sample are supported.
	 * This is the #GBytes variant of gdk_pixbuf_new_from_data().
	 *
	 * Params:
	 *     data = Image data in 8-bit/sample packed format inside a #GBytes
	 *     colorspace = Colorspace for the image data
	 *     hasAlpha = Whether the data has an opacity channel
	 *     bitsPerSample = Number of bits per sample
	 *     width = Width of the image in pixels, must be > 0
	 *     height = Height of the image in pixels, must be > 0
	 *     rowstride = Distance in bytes between row starts
	 *
	 * Returns: A newly-created #GdkPixbuf structure with a reference count of 1.
	 *
	 * Since: 2.32
	 *
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(Bytes data, GdkColorspace colorspace, bool hasAlpha, int bitsPerSample, int width, int height, int rowstride)
	{
		auto p = gdk_pixbuf_new_from_bytes((data is null) ? null : data.getBytesStruct(), colorspace, hasAlpha, bitsPerSample, width, height, rowstride);

		if(p is null)
		{
			throw new ConstructionException("null returned by new_from_bytes");
		}

		this(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Creates a new #GdkPixbuf out of in-memory image data.  Currently only RGB
	 * images with 8 bits per sample are supported.
	 *
	 * Since you are providing a pre-allocated pixel buffer, you must also
	 * specify a way to free that data.  This is done with a function of
	 * type #GdkPixbufDestroyNotify.  When a pixbuf created with is
	 * finalized, your destroy notification function will be called, and
	 * it is its responsibility to free the pixel array.
	 *
	 * See also gdk_pixbuf_new_from_bytes().
	 *
	 * Params:
	 *     data = Image data in 8-bit/sample packed format
	 *     colorspace = Colorspace for the image data
	 *     hasAlpha = Whether the data has an opacity channel
	 *     bitsPerSample = Number of bits per sample
	 *     width = Width of the image in pixels, must be > 0
	 *     height = Height of the image in pixels, must be > 0
	 *     rowstride = Distance in bytes between row starts
	 *     destroyFn = Function used to free the data when the pixbuf's reference count
	 *         drops to zero, or %NULL if the data should not be freed
	 *     destroyFnData = Closure data to pass to the destroy notification function
	 *
	 * Returns: A newly-created #GdkPixbuf structure with a reference count of 1.
	 *
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(char[] data, GdkColorspace colorspace, bool hasAlpha, int bitsPerSample, int width, int height, int rowstride, GdkPixbufDestroyNotify destroyFn, void* destroyFnData)
	{
		auto p = gdk_pixbuf_new_from_data(data.ptr, colorspace, hasAlpha, bitsPerSample, width, height, rowstride, destroyFn, destroyFnData);

		if(p is null)
		{
			throw new ConstructionException("null returned by new_from_data");
		}

		this(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Creates a new pixbuf by loading an image from a file.  The file format is
	 * detected automatically. If %NULL is returned, then @error will be set.
	 * Possible errors are in the #GDK_PIXBUF_ERROR and #G_FILE_ERROR domains.
	 *
	 * Params:
	 *     filename = Name of file to load, in the GLib file name encoding
	 *
	 * Returns: A newly-created pixbuf with a reference count of 1, or %NULL if
	 *     any of several error conditions occurred:  the file could not be opened,
	 *     there was no loader for the file's format, there was not enough memory to
	 *     allocate the image buffer, or the image file contained invalid data.
	 *
	 * Throws: GException on failure.
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(string filename)
	{
		GError* err = null;

		auto p = gdk_pixbuf_new_from_file(Str.toStringz(filename), &err);

		if (err !is null)
		{
			throw new GException( new ErrorG(err) );
		}

		if(p is null)
		{
			throw new ConstructionException("null returned by new_from_file");
		}

		this(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Creates a new pixbuf by loading an image from a file.  The file format is
	 * detected automatically. If %NULL is returned, then @error will be set.
	 * Possible errors are in the #GDK_PIXBUF_ERROR and #G_FILE_ERROR domains.
	 * The image will be scaled to fit in the requested size, optionally preserving
	 * the image's aspect ratio.
	 *
	 * When preserving the aspect ratio, a @width of -1 will cause the image
	 * to be scaled to the exact given height, and a @height of -1 will cause
	 * the image to be scaled to the exact given width. When not preserving
	 * aspect ratio, a @width or @height of -1 means to not scale the image
	 * at all in that dimension. Negative values for @width and @height are
	 * allowed since 2.8.
	 *
	 * Params:
	 *     filename = Name of file to load, in the GLib file name encoding
	 *     width = The width the image should have or -1 to not constrain the width
	 *     height = The height the image should have or -1 to not constrain the height
	 *     preserveAspectRatio = %TRUE to preserve the image's aspect ratio
	 *
	 * Returns: A newly-created pixbuf with a reference count of 1, or %NULL
	 *     if any of several error conditions occurred:  the file could not be opened,
	 *     there was no loader for the file's format, there was not enough memory to
	 *     allocate the image buffer, or the image file contained invalid data.
	 *
	 * Since: 2.6
	 *
	 * Throws: GException on failure.
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(string filename, int width, int height, bool preserveAspectRatio)
	{
		GError* err = null;

		auto p = gdk_pixbuf_new_from_file_at_scale(Str.toStringz(filename), width, height, preserveAspectRatio, &err);

		if (err !is null)
		{
			throw new GException( new ErrorG(err) );
		}

		if(p is null)
		{
			throw new ConstructionException("null returned by new_from_file_at_scale");
		}

		this(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Creates a new pixbuf by loading an image from a file.
	 * The file format is detected automatically. If %NULL is returned, then
	 * @error will be set. Possible errors are in the #GDK_PIXBUF_ERROR and
	 * #G_FILE_ERROR domains.
	 *
	 * The image will be scaled to fit in the requested size, preserving
	 * the image's aspect ratio. Note that the returned pixbuf may be smaller
	 * than @width x @height, if the aspect ratio requires it. To load
	 * and image at the requested size, regardless of aspect ratio, use
	 * gdk_pixbuf_new_from_file_at_scale().
	 *
	 * Params:
	 *     filename = Name of file to load, in the GLib file name encoding
	 *     width = The width the image should have or -1 to not constrain the width
	 *     height = The height the image should have or -1 to not constrain the height
	 *
	 * Returns: A newly-created pixbuf with a reference count of 1, or
	 *     %NULL if any of several error conditions occurred:  the file could not
	 *     be opened, there was no loader for the file's format, there was not
	 *     enough memory to allocate the image buffer, or the image file contained
	 *     invalid data.
	 *
	 * Since: 2.4
	 *
	 * Throws: GException on failure.
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(string filename, int width, int height)
	{
		GError* err = null;

		auto p = gdk_pixbuf_new_from_file_at_size(Str.toStringz(filename), width, height, &err);

		if (err !is null)
		{
			throw new GException( new ErrorG(err) );
		}

		if(p is null)
		{
			throw new ConstructionException("null returned by new_from_file_at_size");
		}

		this(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Create a #GdkPixbuf from a flat representation that is suitable for
	 * storing as inline data in a program. This is useful if you want to
	 * ship a program with images, but don't want to depend on any
	 * external files.
	 *
	 * gdk-pixbuf ships with a program called [gdk-pixbuf-csource][gdk-pixbuf-csource],
	 * which allows for conversion of #GdkPixbufs into such a inline representation.
	 * In almost all cases, you should pass the `--raw` option to
	 * `gdk-pixbuf-csource`. A sample invocation would be:
	 *
	 * |[
	 * gdk-pixbuf-csource --raw --name=myimage_inline myimage.png
	 * ]|
	 *
	 * For the typical case where the inline pixbuf is read-only static data,
	 * you don't need to copy the pixel data unless you intend to write to
	 * it, so you can pass %FALSE for @copy_pixels.  (If you pass `--rle` to
	 * `gdk-pixbuf-csource`, a copy will be made even if @copy_pixels is %FALSE,
	 * so using this option is generally a bad idea.)
	 *
	 * If you create a pixbuf from const inline data compiled into your
	 * program, it's probably safe to ignore errors and disable length checks,
	 * since things will always succeed:
	 * |[
	 * pixbuf = gdk_pixbuf_new_from_inline (-1, myimage_inline, FALSE, NULL);
	 * ]|
	 *
	 * For non-const inline data, you could get out of memory. For untrusted
	 * inline data located at runtime, you could have corrupt inline data in
	 * addition.
	 *
	 * Deprecated: Use #GResource instead.
	 *
	 * Params:
	 *     data = Byte data containing a
	 *         serialized #GdkPixdata structure
	 *     copyPixels = Whether to copy the pixel data, or use direct pointers
	 *         @data for the resulting pixbuf
	 *
	 * Returns: A newly-created #GdkPixbuf structure with a reference,
	 *     count of 1, or %NULL if an error occurred.
	 *
	 * Throws: GException on failure.
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(ubyte[] data, bool copyPixels)
	{
		GError* err = null;

		auto p = gdk_pixbuf_new_from_inline(cast(int)data.length, data.ptr, copyPixels, &err);

		if (err !is null)
		{
			throw new GException( new ErrorG(err) );
		}

		if(p is null)
		{
			throw new ConstructionException("null returned by new_from_inline");
		}

		this(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Creates a new pixbuf by loading an image from an input stream.
	 *
	 * The file format is detected automatically. If %NULL is returned, then
	 * @error will be set. The @cancellable can be used to abort the operation
	 * from another thread. If the operation was cancelled, the error
	 * %G_IO_ERROR_CANCELLED will be returned. Other possible errors are in
	 * the #GDK_PIXBUF_ERROR and %G_IO_ERROR domains.
	 *
	 * The stream is not closed.
	 *
	 * Params:
	 *     stream = a #GInputStream to load the pixbuf from
	 *     cancellable = optional #GCancellable object, %NULL to ignore
	 *
	 * Returns: A newly-created pixbuf, or %NULL if any of several error
	 *     conditions occurred: the file could not be opened, the image format is
	 *     not supported, there was not enough memory to allocate the image buffer,
	 *     the stream contained invalid data, or the operation was cancelled.
	 *
	 * Since: 2.14
	 *
	 * Throws: GException on failure.
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(InputStream stream, Cancellable cancellable)
	{
		GError* err = null;

		auto p = gdk_pixbuf_new_from_stream((stream is null) ? null : stream.getInputStreamStruct(), (cancellable is null) ? null : cancellable.getCancellableStruct(), &err);

		if (err !is null)
		{
			throw new GException( new ErrorG(err) );
		}

		if(p is null)
		{
			throw new ConstructionException("null returned by new_from_stream");
		}

		this(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Creates a new pixbuf by loading an image from an input stream.
	 *
	 * The file format is detected automatically. If %NULL is returned, then
	 * @error will be set. The @cancellable can be used to abort the operation
	 * from another thread. If the operation was cancelled, the error
	 * %G_IO_ERROR_CANCELLED will be returned. Other possible errors are in
	 * the #GDK_PIXBUF_ERROR and %G_IO_ERROR domains.
	 *
	 * The image will be scaled to fit in the requested size, optionally
	 * preserving the image's aspect ratio.
	 *
	 * When preserving the aspect ratio, a @width of -1 will cause the image to be
	 * scaled to the exact given height, and a @height of -1 will cause the image
	 * to be scaled to the exact given width. If both @width and @height are
	 * given, this function will behave as if the smaller of the two values
	 * is passed as -1.
	 *
	 * When not preserving aspect ratio, a @width or @height of -1 means to not
	 * scale the image at all in that dimension.
	 *
	 * The stream is not closed.
	 *
	 * Params:
	 *     stream = a #GInputStream to load the pixbuf from
	 *     width = The width the image should have or -1 to not constrain the width
	 *     height = The height the image should have or -1 to not constrain the height
	 *     preserveAspectRatio = %TRUE to preserve the image's aspect ratio
	 *     cancellable = optional #GCancellable object, %NULL to ignore
	 *
	 * Returns: A newly-created pixbuf, or %NULL if any of several error
	 *     conditions occurred: the file could not be opened, the image format is
	 *     not supported, there was not enough memory to allocate the image buffer,
	 *     the stream contained invalid data, or the operation was cancelled.
	 *
	 * Since: 2.14
	 *
	 * Throws: GException on failure.
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(InputStream stream, int width, int height, bool preserveAspectRatio, Cancellable cancellable)
	{
		GError* err = null;

		auto p = gdk_pixbuf_new_from_stream_at_scale((stream is null) ? null : stream.getInputStreamStruct(), width, height, preserveAspectRatio, (cancellable is null) ? null : cancellable.getCancellableStruct(), &err);

		if (err !is null)
		{
			throw new GException( new ErrorG(err) );
		}

		if(p is null)
		{
			throw new ConstructionException("null returned by new_from_stream_at_scale");
		}

		this(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Finishes an asynchronous pixbuf creation operation started with
	 * gdk_pixbuf_new_from_stream_async().
	 *
	 * Params:
	 *     asyncResult = a #GAsyncResult
	 *
	 * Returns: a #GdkPixbuf or %NULL on error. Free the returned
	 *     object with g_object_unref().
	 *
	 * Since: 2.24
	 *
	 * Throws: GException on failure.
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(AsyncResultIF asyncResult)
	{
		GError* err = null;

		auto p = gdk_pixbuf_new_from_stream_finish((asyncResult is null) ? null : asyncResult.getAsyncResultStruct(), &err);

		if (err !is null)
		{
			throw new GException( new ErrorG(err) );
		}

		if(p is null)
		{
			throw new ConstructionException("null returned by new_from_stream_finish");
		}

		this(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Creates a new pixbuf by parsing XPM data in memory.  This data is commonly
	 * the result of including an XPM file into a program's C source.
	 *
	 * Params:
	 *     data = Pointer to inline XPM data.
	 *
	 * Returns: A newly-created pixbuf with a reference count of 1.
	 *
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(string[] data)
	{
		auto p = gdk_pixbuf_new_from_xpm_data(Str.toStringzArray(data));

		if(p is null)
		{
			throw new ConstructionException("null returned by new_from_xpm_data");
		}

		this(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Calculates the rowstride that an image created with those values would
	 * have. This is useful for front-ends and backends that want to sanity
	 * check image values without needing to create them.
	 *
	 * Params:
	 *     colorspace = Color space for image
	 *     hasAlpha = Whether the image should have transparency information
	 *     bitsPerSample = Number of bits per color sample
	 *     width = Width of image in pixels, must be > 0
	 *     height = Height of image in pixels, must be > 0
	 *
	 * Returns: the rowstride for the given values, or -1 in case of error.
	 *
	 * Since: 2.36.8
	 */
	public static int calculateRowstride(GdkColorspace colorspace, bool hasAlpha, int bitsPerSample, int width, int height)
	{
		return gdk_pixbuf_calculate_rowstride(colorspace, hasAlpha, bitsPerSample, width, height);
	}

	/**
	 * Converts a #GdkPixdata to a #GdkPixbuf. If @copy_pixels is %TRUE or
	 * if the pixel data is run-length-encoded, the pixel data is copied into
	 * newly-allocated memory; otherwise it is reused.
	 *
	 * Deprecated: Use #GResource instead.
	 *
	 * Params:
	 *     pixdata = a #GdkPixdata to convert into a #GdkPixbuf.
	 *     copyPixels = whether to copy raw pixel data; run-length encoded
	 *         pixel data is always copied.
	 *
	 * Returns: a new #GdkPixbuf.
	 *
	 * Throws: GException on failure.
	 */
	public static Pixbuf fromPixdata(Pixdata pixdata, bool copyPixels)
	{
		GError* err = null;

		auto p = gdk_pixbuf_from_pixdata((pixdata is null) ? null : pixdata.getPixdataStruct(), copyPixels, &err);

		if (err !is null)
		{
			throw new GException( new ErrorG(err) );
		}

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(Pixbuf)(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Parses an image file far enough to determine its format and size.
	 *
	 * Params:
	 *     filename = The name of the file to identify.
	 *     width = Return location for the width of the
	 *         image, or %NULL
	 *     height = Return location for the height of the
	 *         image, or %NULL
	 *
	 * Returns: A #GdkPixbufFormat describing
	 *     the image format of the file or %NULL if the image format wasn't
	 *     recognized. The return value is owned by #GdkPixbuf and should
	 *     not be freed.
	 *
	 * Since: 2.4
	 */
	public static PixbufFormat getFileInfo(string filename, out int width, out int height)
	{
		auto p = gdk_pixbuf_get_file_info(Str.toStringz(filename), &width, &height);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(PixbufFormat)(cast(GdkPixbufFormat*) p);
	}

	/**
	 * Asynchronously parses an image file far enough to determine its
	 * format and size.
	 *
	 * For more details see gdk_pixbuf_get_file_info(), which is the synchronous
	 * version of this function.
	 *
	 * When the operation is finished, @callback will be called in the
	 * main thread. You can then call gdk_pixbuf_get_file_info_finish() to
	 * get the result of the operation.
	 *
	 * Params:
	 *     filename = The name of the file to identify
	 *     cancellable = optional #GCancellable object, %NULL to ignore
	 *     callback = a #GAsyncReadyCallback to call when the file info is available
	 *     userData = the data to pass to the callback function
	 *
	 * Since: 2.32
	 */
	public static void getFileInfoAsync(string filename, Cancellable cancellable, GAsyncReadyCallback callback, void* userData)
	{
		gdk_pixbuf_get_file_info_async(Str.toStringz(filename), (cancellable is null) ? null : cancellable.getCancellableStruct(), callback, userData);
	}

	/**
	 * Finishes an asynchronous pixbuf parsing operation started with
	 * gdk_pixbuf_get_file_info_async().
	 *
	 * Params:
	 *     asyncResult = a #GAsyncResult
	 *     width = Return location for the width of the image, or %NULL
	 *     height = Return location for the height of the image, or %NULL
	 *
	 * Returns: A #GdkPixbufFormat describing the image
	 *     format of the file or %NULL if the image format wasn't
	 *     recognized. The return value is owned by GdkPixbuf and should
	 *     not be freed.
	 *
	 * Since: 2.32
	 *
	 * Throws: GException on failure.
	 */
	public static PixbufFormat getFileInfoFinish(AsyncResultIF asyncResult, out int width, out int height)
	{
		GError* err = null;

		auto p = gdk_pixbuf_get_file_info_finish((asyncResult is null) ? null : asyncResult.getAsyncResultStruct(), &width, &height, &err);

		if (err !is null)
		{
			throw new GException( new ErrorG(err) );
		}

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(PixbufFormat)(cast(GdkPixbufFormat*) p);
	}

	/**
	 * Obtains the available information about the image formats supported
	 * by GdkPixbuf.
	 *
	 * Returns: A list of
	 *     #GdkPixbufFormats describing the supported image formats. The list should
	 *     be freed when it is no longer needed, but the structures themselves are
	 *     owned by #GdkPixbuf and should not be freed.
	 *
	 * Since: 2.2
	 */
	public static ListSG getFormats()
	{
		auto p = gdk_pixbuf_get_formats();

		if(p is null)
		{
			return null;
		}

		return new ListSG(cast(GSList*) p);
	}

	/**
	 * Creates a new pixbuf by asynchronously loading an image from an input stream.
	 *
	 * For more details see gdk_pixbuf_new_from_stream(), which is the synchronous
	 * version of this function.
	 *
	 * When the operation is finished, @callback will be called in the main thread.
	 * You can then call gdk_pixbuf_new_from_stream_finish() to get the result of the operation.
	 *
	 * Params:
	 *     stream = a #GInputStream from which to load the pixbuf
	 *     cancellable = optional #GCancellable object, %NULL to ignore
	 *     callback = a #GAsyncReadyCallback to call when the pixbuf is loaded
	 *     userData = the data to pass to the callback function
	 *
	 * Since: 2.24
	 */
	public static void newFromStreamAsync(InputStream stream, Cancellable cancellable, GAsyncReadyCallback callback, void* userData)
	{
		gdk_pixbuf_new_from_stream_async((stream is null) ? null : stream.getInputStreamStruct(), (cancellable is null) ? null : cancellable.getCancellableStruct(), callback, userData);
	}

	/**
	 * Creates a new pixbuf by asynchronously loading an image from an input stream.
	 *
	 * For more details see gdk_pixbuf_new_from_stream_at_scale(), which is the synchronous
	 * version of this function.
	 *
	 * When the operation is finished, @callback will be called in the main thread.
	 * You can then call gdk_pixbuf_new_from_stream_finish() to get the result of the operation.
	 *
	 * Params:
	 *     stream = a #GInputStream from which to load the pixbuf
	 *     width = the width the image should have or -1 to not constrain the width
	 *     height = the height the image should have or -1 to not constrain the height
	 *     preserveAspectRatio = %TRUE to preserve the image's aspect ratio
	 *     cancellable = optional #GCancellable object, %NULL to ignore
	 *     callback = a #GAsyncReadyCallback to call when the pixbuf is loaded
	 *     userData = the data to pass to the callback function
	 *
	 * Since: 2.24
	 */
	public static void newFromStreamAtScaleAsync(InputStream stream, int width, int height, bool preserveAspectRatio, Cancellable cancellable, GAsyncReadyCallback callback, void* userData)
	{
		gdk_pixbuf_new_from_stream_at_scale_async((stream is null) ? null : stream.getInputStreamStruct(), width, height, preserveAspectRatio, (cancellable is null) ? null : cancellable.getCancellableStruct(), callback, userData);
	}

	/**
	 * Finishes an asynchronous pixbuf save operation started with
	 * gdk_pixbuf_save_to_stream_async().
	 *
	 * Params:
	 *     asyncResult = a #GAsyncResult
	 *
	 * Returns: %TRUE if the pixbuf was saved successfully, %FALSE if an error was set.
	 *
	 * Since: 2.24
	 *
	 * Throws: GException on failure.
	 */
	public static bool saveToStreamFinish(AsyncResultIF asyncResult)
	{
		GError* err = null;

		auto p = gdk_pixbuf_save_to_stream_finish((asyncResult is null) ? null : asyncResult.getAsyncResultStruct(), &err) != 0;

		if (err !is null)
		{
			throw new GException( new ErrorG(err) );
		}

		return p;
	}

	/**
	 * Takes an existing pixbuf and adds an alpha channel to it.
	 * If the existing pixbuf already had an alpha channel, the channel
	 * values are copied from the original; otherwise, the alpha channel
	 * is initialized to 255 (full opacity).
	 *
	 * If @substitute_color is %TRUE, then the color specified by (@r, @g, @b) will be
	 * assigned zero opacity. That is, if you pass (255, 255, 255) for the
	 * substitute color, all white pixels will become fully transparent.
	 *
	 * Params:
	 *     substituteColor = Whether to set a color to zero opacity.  If this
	 *         is %FALSE, then the (@r, @g, @b) arguments will be ignored.
	 *     r = Red value to substitute.
	 *     g = Green value to substitute.
	 *     b = Blue value to substitute.
	 *
	 * Returns: A newly-created pixbuf with a reference count of 1.
	 */
	public Pixbuf addAlpha(bool substituteColor, char r, char g, char b)
	{
		auto p = gdk_pixbuf_add_alpha(gdkPixbuf, substituteColor, r, g, b);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(Pixbuf)(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Takes an existing pixbuf and checks for the presence of an
	 * associated "orientation" option, which may be provided by the
	 * jpeg loader (which reads the exif orientation tag) or the
	 * tiff loader (which reads the tiff orientation tag, and
	 * compensates it for the partial transforms performed by
	 * libtiff). If an orientation option/tag is present, the
	 * appropriate transform will be performed so that the pixbuf
	 * is oriented correctly.
	 *
	 * Returns: A newly-created pixbuf, %NULL if
	 *     not enough memory could be allocated for it, or a reference to the
	 *     input pixbuf (with an increased reference count).
	 *
	 * Since: 2.12
	 */
	public Pixbuf applyEmbeddedOrientation()
	{
		auto p = gdk_pixbuf_apply_embedded_orientation(gdkPixbuf);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(Pixbuf)(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Creates a transformation of the source image @src by scaling by
	 * @scale_x and @scale_y then translating by @offset_x and @offset_y.
	 * This gives an image in the coordinates of the destination pixbuf.
	 * The rectangle (@dest_x, @dest_y, @dest_width, @dest_height)
	 * is then alpha blended onto the corresponding rectangle of the
	 * original destination image.
	 *
	 * When the destination rectangle contains parts not in the source
	 * image, the data at the edges of the source image is replicated
	 * to infinity.
	 *
	 * ![](composite.png)
	 *
	 * Params:
	 *     dest = the #GdkPixbuf into which to render the results
	 *     destX = the left coordinate for region to render
	 *     destY = the top coordinate for region to render
	 *     destWidth = the width of the region to render
	 *     destHeight = the height of the region to render
	 *     offsetX = the offset in the X direction (currently rounded to an integer)
	 *     offsetY = the offset in the Y direction (currently rounded to an integer)
	 *     scaleX = the scale factor in the X direction
	 *     scaleY = the scale factor in the Y direction
	 *     interpType = the interpolation type for the transformation.
	 *     overallAlpha = overall alpha for source image (0..255)
	 */
	public void composite(Pixbuf dest, int destX, int destY, int destWidth, int destHeight, double offsetX, double offsetY, double scaleX, double scaleY, GdkInterpType interpType, int overallAlpha)
	{
		gdk_pixbuf_composite(gdkPixbuf, (dest is null) ? null : dest.getPixbufStruct(), destX, destY, destWidth, destHeight, offsetX, offsetY, scaleX, scaleY, interpType, overallAlpha);
	}

	/**
	 * Creates a transformation of the source image @src by scaling by
	 * @scale_x and @scale_y then translating by @offset_x and @offset_y,
	 * then alpha blends the rectangle (@dest_x ,@dest_y, @dest_width,
	 * @dest_height) of the resulting image with a checkboard of the
	 * colors @color1 and @color2 and renders it onto the destination
	 * image.
	 *
	 * If the source image has no alpha channel, and @overall_alpha is 255, a fast
	 * path is used which omits the alpha blending and just performs the scaling.
	 *
	 * See gdk_pixbuf_composite_color_simple() for a simpler variant of this
	 * function suitable for many tasks.
	 *
	 * Params:
	 *     dest = the #GdkPixbuf into which to render the results
	 *     destX = the left coordinate for region to render
	 *     destY = the top coordinate for region to render
	 *     destWidth = the width of the region to render
	 *     destHeight = the height of the region to render
	 *     offsetX = the offset in the X direction (currently rounded to an integer)
	 *     offsetY = the offset in the Y direction (currently rounded to an integer)
	 *     scaleX = the scale factor in the X direction
	 *     scaleY = the scale factor in the Y direction
	 *     interpType = the interpolation type for the transformation.
	 *     overallAlpha = overall alpha for source image (0..255)
	 *     checkX = the X offset for the checkboard (origin of checkboard is at -@check_x, -@check_y)
	 *     checkY = the Y offset for the checkboard
	 *     checkSize = the size of checks in the checkboard (must be a power of two)
	 *     color1 = the color of check at upper left
	 *     color2 = the color of the other check
	 */
	public void compositeColor(Pixbuf dest, int destX, int destY, int destWidth, int destHeight, double offsetX, double offsetY, double scaleX, double scaleY, GdkInterpType interpType, int overallAlpha, int checkX, int checkY, int checkSize, uint color1, uint color2)
	{
		gdk_pixbuf_composite_color(gdkPixbuf, (dest is null) ? null : dest.getPixbufStruct(), destX, destY, destWidth, destHeight, offsetX, offsetY, scaleX, scaleY, interpType, overallAlpha, checkX, checkY, checkSize, color1, color2);
	}

	/**
	 * Creates a new #GdkPixbuf by scaling @src to @dest_width x
	 * @dest_height and alpha blending the result with a checkboard of colors
	 * @color1 and @color2.
	 *
	 * Params:
	 *     destWidth = the width of destination image
	 *     destHeight = the height of destination image
	 *     interpType = the interpolation type for the transformation.
	 *     overallAlpha = overall alpha for source image (0..255)
	 *     checkSize = the size of checks in the checkboard (must be a power of two)
	 *     color1 = the color of check at upper left
	 *     color2 = the color of the other check
	 *
	 * Returns: the new #GdkPixbuf, or %NULL if not enough memory could be
	 *     allocated for it.
	 */
	public Pixbuf compositeColorSimple(int destWidth, int destHeight, GdkInterpType interpType, int overallAlpha, int checkSize, uint color1, uint color2)
	{
		auto p = gdk_pixbuf_composite_color_simple(gdkPixbuf, destWidth, destHeight, interpType, overallAlpha, checkSize, color1, color2);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(Pixbuf)(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Creates a new #GdkPixbuf with a copy of the information in the specified
	 * @pixbuf. Note that this does not copy the options set on the original #GdkPixbuf,
	 * use gdk_pixbuf_copy_options() for this.
	 *
	 * Returns: A newly-created pixbuf with a reference count of 1, or %NULL if
	 *     not enough memory could be allocated.
	 */
	public Pixbuf copy()
	{
		auto p = gdk_pixbuf_copy(gdkPixbuf);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(Pixbuf)(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Copies a rectangular area from @src_pixbuf to @dest_pixbuf.  Conversion of
	 * pixbuf formats is done automatically.
	 *
	 * If the source rectangle overlaps the destination rectangle on the
	 * same pixbuf, it will be overwritten during the copy operation.
	 * Therefore, you can not use this function to scroll a pixbuf.
	 *
	 * Params:
	 *     srcX = Source X coordinate within @src_pixbuf.
	 *     srcY = Source Y coordinate within @src_pixbuf.
	 *     width = Width of the area to copy.
	 *     height = Height of the area to copy.
	 *     destPixbuf = Destination pixbuf.
	 *     destX = X coordinate within @dest_pixbuf.
	 *     destY = Y coordinate within @dest_pixbuf.
	 */
	public void copyArea(int srcX, int srcY, int width, int height, Pixbuf destPixbuf, int destX, int destY)
	{
		gdk_pixbuf_copy_area(gdkPixbuf, srcX, srcY, width, height, (destPixbuf is null) ? null : destPixbuf.getPixbufStruct(), destX, destY);
	}

	/**
	 * Copy the key/value pair options attached to a #GdkPixbuf to another.
	 * This is useful to keep original metadata after having manipulated
	 * a file. However be careful to remove metadata which you've already
	 * applied, such as the "orientation" option after rotating the image.
	 *
	 * Params:
	 *     destPixbuf = the #GdkPixbuf to copy options to
	 *
	 * Returns: %TRUE on success.
	 *
	 * Since: 2.36
	 */
	public bool copyOptions(Pixbuf destPixbuf)
	{
		return gdk_pixbuf_copy_options(gdkPixbuf, (destPixbuf is null) ? null : destPixbuf.getPixbufStruct()) != 0;
	}

	/**
	 * Clears a pixbuf to the given RGBA value, converting the RGBA value into
	 * the pixbuf's pixel format. The alpha will be ignored if the pixbuf
	 * doesn't have an alpha channel.
	 *
	 * Params:
	 *     pixel = RGBA pixel to clear to
	 *         (0xffffffff is opaque white, 0x00000000 transparent black)
	 */
	public void fill(uint pixel)
	{
		gdk_pixbuf_fill(gdkPixbuf, pixel);
	}

	/**
	 * Flips a pixbuf horizontally or vertically and returns the
	 * result in a new pixbuf.
	 *
	 * Params:
	 *     horizontal = %TRUE to flip horizontally, %FALSE to flip vertically
	 *
	 * Returns: the new #GdkPixbuf, or %NULL
	 *     if not enough memory could be allocated for it.
	 *
	 * Since: 2.6
	 */
	public Pixbuf flip(bool horizontal)
	{
		auto p = gdk_pixbuf_flip(gdkPixbuf, horizontal);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(Pixbuf)(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Queries the number of bits per color sample in a pixbuf.
	 *
	 * Returns: Number of bits per color sample.
	 */
	public int getBitsPerSample()
	{
		return gdk_pixbuf_get_bits_per_sample(gdkPixbuf);
	}

	/**
	 * Returns the length of the pixel data, in bytes.
	 *
	 * Returns: The length of the pixel data.
	 *
	 * Since: 2.26
	 */
	public size_t getByteLength()
	{
		return gdk_pixbuf_get_byte_length(gdkPixbuf);
	}

	/**
	 * Queries the color space of a pixbuf.
	 *
	 * Returns: Color space.
	 */
	public GdkColorspace getColorspace()
	{
		return gdk_pixbuf_get_colorspace(gdkPixbuf);
	}

	/**
	 * Queries whether a pixbuf has an alpha channel (opacity information).
	 *
	 * Returns: %TRUE if it has an alpha channel, %FALSE otherwise.
	 */
	public bool getHasAlpha()
	{
		return gdk_pixbuf_get_has_alpha(gdkPixbuf) != 0;
	}

	/**
	 * Queries the height of a pixbuf.
	 *
	 * Returns: Height in pixels.
	 */
	public int getHeight()
	{
		return gdk_pixbuf_get_height(gdkPixbuf);
	}

	/**
	 * Queries the number of channels of a pixbuf.
	 *
	 * Returns: Number of channels.
	 */
	public int getNChannels()
	{
		return gdk_pixbuf_get_n_channels(gdkPixbuf);
	}

	/**
	 * Looks up @key in the list of options that may have been attached to the
	 * @pixbuf when it was loaded, or that may have been attached by another
	 * function using gdk_pixbuf_set_option().
	 *
	 * For instance, the ANI loader provides "Title" and "Artist" options.
	 * The ICO, XBM, and XPM loaders provide "x_hot" and "y_hot" hot-spot
	 * options for cursor definitions. The PNG loader provides the tEXt ancillary
	 * chunk key/value pairs as options. Since 2.12, the TIFF and JPEG loaders
	 * return an "orientation" option string that corresponds to the embedded
	 * TIFF/Exif orientation tag (if present). Since 2.32, the TIFF loader sets
	 * the "multipage" option string to "yes" when a multi-page TIFF is loaded.
	 * Since 2.32 the JPEG and PNG loaders set "x-dpi" and "y-dpi" if the file
	 * contains image density information in dots per inch.
	 * Since 2.36.6, the JPEG loader sets the "comment" option with the comment
	 * EXIF tag.
	 *
	 * Params:
	 *     key = a nul-terminated string.
	 *
	 * Returns: the value associated with @key. This is a nul-terminated
	 *     string that should not be freed or %NULL if @key was not found.
	 */
	public string getOption(string key)
	{
		return Str.toString(gdk_pixbuf_get_option(gdkPixbuf, Str.toStringz(key)));
	}

	/**
	 * Returns a #GHashTable with a list of all the options that may have been
	 * attached to the @pixbuf when it was loaded, or that may have been
	 * attached by another function using gdk_pixbuf_set_option().
	 *
	 * See gdk_pixbuf_get_option() for more details.
	 *
	 * Returns: a #GHashTable of key/values
	 *
	 * Since: 2.32
	 */
	public HashTable getOptions()
	{
		auto p = gdk_pixbuf_get_options(gdkPixbuf);

		if(p is null)
		{
			return null;
		}

		return new HashTable(cast(GHashTable*) p);
	}

	/**
	 * Queries a pointer to the pixel data of a pixbuf.
	 *
	 * Returns: A pointer to the pixbuf's
	 *     pixel data.  Please see the section on [image data](image-data)
	 *     for information about how the pixel data is stored in memory.
	 *
	 *     This function will cause an implicit copy of the pixbuf data if the
	 *     pixbuf was created from read-only data.
	 *
	 * Since: 2.26
	 */
	public char[] getPixelsWithLength()
	{
		uint length;

		auto p = gdk_pixbuf_get_pixels_with_length(gdkPixbuf, &length);

		return p[0 .. length];
	}

	/**
	 * Queries the rowstride of a pixbuf, which is the number of bytes between
	 * the start of a row and the start of the next row.
	 *
	 * Returns: Distance between row starts.
	 */
	public int getRowstride()
	{
		return gdk_pixbuf_get_rowstride(gdkPixbuf);
	}

	/**
	 * Queries the width of a pixbuf.
	 *
	 * Returns: Width in pixels.
	 */
	public int getWidth()
	{
		return gdk_pixbuf_get_width(gdkPixbuf);
	}

	/**
	 * Creates a new pixbuf which represents a sub-region of @src_pixbuf.
	 * The new pixbuf shares its pixels with the original pixbuf, so
	 * writing to one affects both.  The new pixbuf holds a reference to
	 * @src_pixbuf, so @src_pixbuf will not be finalized until the new
	 * pixbuf is finalized.
	 *
	 * Note that if @src_pixbuf is read-only, this function will force it
	 * to be mutable.
	 *
	 * Params:
	 *     srcX = X coord in @src_pixbuf
	 *     srcY = Y coord in @src_pixbuf
	 *     width = width of region in @src_pixbuf
	 *     height = height of region in @src_pixbuf
	 *
	 * Returns: a new pixbuf
	 */
	public Pixbuf newSubpixbuf(int srcX, int srcY, int width, int height)
	{
		auto p = gdk_pixbuf_new_subpixbuf(gdkPixbuf, srcX, srcY, width, height);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(Pixbuf)(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Returns: A new reference to a read-only copy of
	 *     the pixel data.  Note that for mutable pixbufs, this function will
	 *     incur a one-time copy of the pixel data for conversion into the
	 *     returned #GBytes.
	 *
	 * Since: 2.32
	 */
	public Bytes readPixelBytes()
	{
		auto p = gdk_pixbuf_read_pixel_bytes(gdkPixbuf);

		if(p is null)
		{
			return null;
		}

		return new Bytes(cast(GBytes*) p, true);
	}

	/**
	 * Returns a read-only pointer to the raw pixel data; must not be
	 * modified.  This function allows skipping the implicit copy that
	 * must be made if gdk_pixbuf_get_pixels() is called on a read-only
	 * pixbuf.
	 *
	 * Since: 2.32
	 */
	public ubyte* readPixels()
	{
		return gdk_pixbuf_read_pixels(gdkPixbuf);
	}

	/**
	 * Remove the key/value pair option attached to a #GdkPixbuf.
	 *
	 * Params:
	 *     key = a nul-terminated string representing the key to remove.
	 *
	 * Returns: %TRUE if an option was removed, %FALSE if not.
	 *
	 * Since: 2.36
	 */
	public bool removeOption(string key)
	{
		return gdk_pixbuf_remove_option(gdkPixbuf, Str.toStringz(key)) != 0;
	}

	/**
	 * Rotates a pixbuf by a multiple of 90 degrees, and returns the
	 * result in a new pixbuf.
	 *
	 * If @angle is 0, a copy of @src is returned, avoiding any rotation.
	 *
	 * Params:
	 *     angle = the angle to rotate by
	 *
	 * Returns: the new #GdkPixbuf, or %NULL
	 *     if not enough memory could be allocated for it.
	 *
	 * Since: 2.6
	 */
	public Pixbuf rotateSimple(GdkPixbufRotation angle)
	{
		auto p = gdk_pixbuf_rotate_simple(gdkPixbuf, angle);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(Pixbuf)(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Modifies saturation and optionally pixelates @src, placing the result in
	 * @dest. @src and @dest may be the same pixbuf with no ill effects.  If
	 * @saturation is 1.0 then saturation is not changed. If it's less than 1.0,
	 * saturation is reduced (the image turns toward grayscale); if greater than
	 * 1.0, saturation is increased (the image gets more vivid colors). If @pixelate
	 * is %TRUE, then pixels are faded in a checkerboard pattern to create a
	 * pixelated image. @src and @dest must have the same image format, size, and
	 * rowstride.
	 *
	 * Params:
	 *     dest = place to write modified version of @src
	 *     saturation = saturation factor
	 *     pixelate = whether to pixelate
	 */
	public void saturateAndPixelate(Pixbuf dest, float saturation, bool pixelate)
	{
		gdk_pixbuf_saturate_and_pixelate(gdkPixbuf, (dest is null) ? null : dest.getPixbufStruct(), saturation, pixelate);
	}

	/**
	 * Saves pixbuf to a callback in format @type, which is currently "jpeg",
	 * "png", "tiff", "ico" or "bmp".  If @error is set, %FALSE will be returned. See
	 * gdk_pixbuf_save_to_callback () for more details.
	 *
	 * Params:
	 *     saveFunc = a function that is called to save each block of data that
	 *         the save routine generates.
	 *     userData = user data to pass to the save function.
	 *     type = name of file format.
	 *     optionKeys = name of options to set, %NULL-terminated
	 *     optionValues = values for named options
	 *
	 * Returns: whether an error was set
	 *
	 * Since: 2.4
	 *
	 * Throws: GException on failure.
	 */
	public bool saveToCallbackv(GdkPixbufSaveFunc saveFunc, void* userData, string type, string[] optionKeys, string[] optionValues)
	{
		GError* err = null;

		auto p = gdk_pixbuf_save_to_callbackv(gdkPixbuf, saveFunc, userData, Str.toStringz(type), Str.toStringzArray(optionKeys), Str.toStringzArray(optionValues), &err) != 0;

		if (err !is null)
		{
			throw new GException( new ErrorG(err) );
		}

		return p;
	}

	/**
	 * Saves @pixbuf to an output stream.
	 *
	 * Supported file formats are currently "jpeg", "tiff", "png", "ico" or
	 * "bmp". See gdk_pixbuf_save_to_stream() for more details.
	 *
	 * Params:
	 *     stream = a #GOutputStream to save the pixbuf to
	 *     type = name of file format
	 *     optionKeys = name of options to set, %NULL-terminated
	 *     optionValues = values for named options
	 *     cancellable = optional #GCancellable object, %NULL to ignore
	 *
	 * Returns: %TRUE if the pixbuf was saved successfully, %FALSE if an
	 *     error was set.
	 *
	 * Since: 2.36
	 *
	 * Throws: GException on failure.
	 */
	public bool saveToStreamv(OutputStream stream, string type, string[] optionKeys, string[] optionValues, Cancellable cancellable)
	{
		GError* err = null;

		auto p = gdk_pixbuf_save_to_streamv(gdkPixbuf, (stream is null) ? null : stream.getOutputStreamStruct(), Str.toStringz(type), Str.toStringzArray(optionKeys), Str.toStringzArray(optionValues), (cancellable is null) ? null : cancellable.getCancellableStruct(), &err) != 0;

		if (err !is null)
		{
			throw new GException( new ErrorG(err) );
		}

		return p;
	}

	/**
	 * Saves @pixbuf to an output stream asynchronously.
	 *
	 * For more details see gdk_pixbuf_save_to_streamv(), which is the synchronous
	 * version of this function.
	 *
	 * When the operation is finished, @callback will be called in the main thread.
	 * You can then call gdk_pixbuf_save_to_stream_finish() to get the result of the operation.
	 *
	 * Params:
	 *     stream = a #GOutputStream to which to save the pixbuf
	 *     type = name of file format
	 *     optionKeys = name of options to set, %NULL-terminated
	 *     optionValues = values for named options
	 *     cancellable = optional #GCancellable object, %NULL to ignore
	 *     callback = a #GAsyncReadyCallback to call when the pixbuf is saved
	 *     userData = the data to pass to the callback function
	 *
	 * Since: 2.36
	 */
	public void saveToStreamvAsync(OutputStream stream, string type, string[] optionKeys, string[] optionValues, Cancellable cancellable, GAsyncReadyCallback callback, void* userData)
	{
		gdk_pixbuf_save_to_streamv_async(gdkPixbuf, (stream is null) ? null : stream.getOutputStreamStruct(), Str.toStringz(type), Str.toStringzArray(optionKeys), Str.toStringzArray(optionValues), (cancellable is null) ? null : cancellable.getCancellableStruct(), callback, userData);
	}

	/**
	 * Saves pixbuf to a file in @type, which is currently "jpeg", "png", "tiff", "ico" or "bmp".
	 * If @error is set, %FALSE will be returned.
	 * See gdk_pixbuf_save () for more details.
	 *
	 * Params:
	 *     filename = name of file to save.
	 *     type = name of file format.
	 *     optionKeys = name of options to set, %NULL-terminated
	 *     optionValues = values for named options
	 *
	 * Returns: whether an error was set
	 *
	 * Throws: GException on failure.
	 */
	public bool savev(string filename, string type, string[] optionKeys, string[] optionValues)
	{
		GError* err = null;

		auto p = gdk_pixbuf_savev(gdkPixbuf, Str.toStringz(filename), Str.toStringz(type), Str.toStringzArray(optionKeys), Str.toStringzArray(optionValues), &err) != 0;

		if (err !is null)
		{
			throw new GException( new ErrorG(err) );
		}

		return p;
	}

	/**
	 * Creates a transformation of the source image @src by scaling by
	 * @scale_x and @scale_y then translating by @offset_x and @offset_y,
	 * then renders the rectangle (@dest_x, @dest_y, @dest_width,
	 * @dest_height) of the resulting image onto the destination image
	 * replacing the previous contents.
	 *
	 * Try to use gdk_pixbuf_scale_simple() first, this function is
	 * the industrial-strength power tool you can fall back to if
	 * gdk_pixbuf_scale_simple() isn't powerful enough.
	 *
	 * If the source rectangle overlaps the destination rectangle on the
	 * same pixbuf, it will be overwritten during the scaling which
	 * results in rendering artifacts.
	 *
	 * Params:
	 *     dest = the #GdkPixbuf into which to render the results
	 *     destX = the left coordinate for region to render
	 *     destY = the top coordinate for region to render
	 *     destWidth = the width of the region to render
	 *     destHeight = the height of the region to render
	 *     offsetX = the offset in the X direction (currently rounded to an integer)
	 *     offsetY = the offset in the Y direction (currently rounded to an integer)
	 *     scaleX = the scale factor in the X direction
	 *     scaleY = the scale factor in the Y direction
	 *     interpType = the interpolation type for the transformation.
	 */
	public void scale(Pixbuf dest, int destX, int destY, int destWidth, int destHeight, double offsetX, double offsetY, double scaleX, double scaleY, GdkInterpType interpType)
	{
		gdk_pixbuf_scale(gdkPixbuf, (dest is null) ? null : dest.getPixbufStruct(), destX, destY, destWidth, destHeight, offsetX, offsetY, scaleX, scaleY, interpType);
	}

	/**
	 * Create a new #GdkPixbuf containing a copy of @src scaled to
	 * @dest_width x @dest_height. Leaves @src unaffected.  @interp_type
	 * should be #GDK_INTERP_NEAREST if you want maximum speed (but when
	 * scaling down #GDK_INTERP_NEAREST is usually unusably ugly).  The
	 * default @interp_type should be #GDK_INTERP_BILINEAR which offers
	 * reasonable quality and speed.
	 *
	 * You can scale a sub-portion of @src by creating a sub-pixbuf
	 * pointing into @src; see gdk_pixbuf_new_subpixbuf().
	 *
	 * If @dest_width and @dest_height are equal to the @src width and height, a
	 * copy of @src is returned, avoiding any scaling.
	 *
	 * For more complicated scaling/alpha blending see gdk_pixbuf_scale()
	 * and gdk_pixbuf_composite().
	 *
	 * Params:
	 *     destWidth = the width of destination image
	 *     destHeight = the height of destination image
	 *     interpType = the interpolation type for the transformation.
	 *
	 * Returns: the new #GdkPixbuf, or %NULL if not enough memory could be
	 *     allocated for it.
	 */
	public Pixbuf scaleSimple(int destWidth, int destHeight, GdkInterpType interpType)
	{
		auto p = gdk_pixbuf_scale_simple(gdkPixbuf, destWidth, destHeight, interpType);

		if(p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(Pixbuf)(cast(GdkPixbuf*) p, true);
	}

	/**
	 * Attaches a key/value pair as an option to a #GdkPixbuf. If @key already
	 * exists in the list of options attached to @pixbuf, the new value is
	 * ignored and %FALSE is returned.
	 *
	 * Params:
	 *     key = a nul-terminated string.
	 *     value = a nul-terminated string.
	 *
	 * Returns: %TRUE on success.
	 *
	 * Since: 2.2
	 */
	public bool setOption(string key, string value)
	{
		return gdk_pixbuf_set_option(gdkPixbuf, Str.toStringz(key), Str.toStringz(value)) != 0;
	}
}