Gdk::Image Class Reference

This represents an area for drawing graphics. More...

Inherits Glib::Object.

Collaboration diagram for Gdk::Image:

[legend]

List of all members.

Public Member Functions
virtual	~Image ()
GdkImage*	gobj ()
	Provides access to the underlying C GObject.
const GdkImage*	gobj () const
	Provides access to the underlying C GObject.
GdkImage*	gobj_copy ()
	Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.
void	put_pixel (int x, int y, guint32 pixel)
guint32	get_pixel (int x, int y) const
void	set_colormap (const Glib::RefPtr< Colormap >& colormap)
	Sets the colormap for the image to the given colormap.
Glib::RefPtr< Colormap >	get_colormap ()
	Retrieves the colormap for a given image, if it exists.
Glib::RefPtr< const Colormap >	get_colormap () const
	Retrieves the colormap for a given image, if it exists.
ImageType	get_image_type () const
Glib::RefPtr< Visual >	get_visual ()
Glib::RefPtr< const Visual >	get_visual () const
ByteOrder	get_byte_order () const
int	get_width () const
int	get_height () const
guint16	get_bpp () const
guint16	get_bpl () const
guint16	get_bits_per_pixel () const
void*	get_mem ()
const void*	get_mem () const
void*	get_windowing_data () const
Static Public Member Functions
static Glib::RefPtr< Image >	create (ImageType type, const Glib::RefPtr< Visual >& visual, int width, int height)
Protected Member Functions
	Image (ImageType type, const Glib::RefPtr< Visual >& visual, int width, int height)
	Instantiate a new Gdk::Image.
Related Functions
(Note that these are not member functions.)
Glib::RefPtr< Gdk::Image >	wrap (GdkImage* object, bool take_copy=false)
	A Glib::wrap() method for this object.

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Detailed Description

This represents an area for drawing graphics.

It has now been superceded to a large extent by the much more flexible Gdk::Drawable RGB functions. To create an image from part of a Gdk::Window use Gdk::Drawable::get_image().

The image can be manipulated with get_pixel() and put_pixel(), or alternatively by changing the actual pixel data, though manipulating the pixel data requires complicated code to cope with the different formats that may be used. To draw a Gdk::Image in a Gdk::Window or Gdk::Pixmap use Gdk::Drawable::draw_image().

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Constructor & Destructor Documentation

virtual Gdk::Image::~Image

(

)

[virtual]

Gdk::Image::Image	(	ImageType	type,
		const Glib::RefPtr< Visual >&	visual,
		int	width,
		int	height
	)			[protected]

Instantiate a new Gdk::Image.

Parameters:

	type	The type of the Gdk::Image. Gdk::IMAGE_FASTEST is probably the best choice, since it will try to create a Gdk::IMAGE_SHARED image first and if that fails it will then use Gdk::IMAGE_NORMAL.
	visual	The Gdk::Visual to use for the image.
	width	The width of the image in pixels.
	height	The height of the image in pixels.

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Member Function Documentation

static Glib::RefPtr<Image> Gdk::Image::create	(	ImageType	type,
		const Glib::RefPtr< Visual >&	visual,
		int	width,
		int	height
	)			[static]

guint16 Gdk::Image::get_bits_per_pixel

(

)

const

guint16 Gdk::Image::get_bpl

(

)

const

guint16 Gdk::Image::get_bpp

(

)

const

ByteOrder Gdk::Image::get_byte_order

(

)

const

Glib::RefPtr<const Colormap> Gdk::Image::get_colormap

(

)

const

Retrieves the colormap for a given image, if it exists.

An image will have a colormap if the drawable from which it was created has a colormap, or if a colormap was set explicitely with set_colormap().

Returns:

Colormap for the image.

Glib::RefPtr<Colormap> Gdk::Image::get_colormap

(

)

Retrieves the colormap for a given image, if it exists.

An image will have a colormap if the drawable from which it was created has a colormap, or if a colormap was set explicitely with set_colormap().

Returns:

Colormap for the image.

int Gdk::Image::get_height

(

)

const

ImageType Gdk::Image::get_image_type

(

)

const

const void* Gdk::Image::get_mem

(

)

const

void* Gdk::Image::get_mem

(

)

guint32 Gdk::Image::get_pixel	(	int	x,
		int	y
	)			const

Glib::RefPtr<const Visual> Gdk::Image::get_visual

(

)

const

Glib::RefPtr<Visual> Gdk::Image::get_visual

(

)

int Gdk::Image::get_width

(

)

const

void* Gdk::Image::get_windowing_data

(

)

const

const GdkImage* Gdk::Image::gobj

(

)

const [inline]

Provides access to the underlying C GObject.

Reimplemented from Glib::ObjectBase.

GdkImage* Gdk::Image::gobj

(

)

[inline]

Provides access to the underlying C GObject.

Reimplemented from Glib::ObjectBase.

GdkImage* Gdk::Image::gobj_copy

(

)

Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.

void Gdk::Image::put_pixel	(	int	x,
		int	y,
		guint32	pixel
	)

void Gdk::Image::set_colormap

(

const Glib::RefPtr< Colormap >&

colormap

)

Sets the colormap for the image to the given colormap.

Normally there's no need to use this function, images are created with the correct colormap if you get the image from a drawable. If you create the image from scratch, use the colormap of the drawable you intend to render the image to.

Parameters:

colormap

A Gdk::Colormap.

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Friends And Related Function Documentation

Glib::RefPtr< Gdk::Image > wrap	(	GdkImage *	object,
		bool	take_copy = false
	)			[related]

A Glib::wrap() method for this object.

Parameters:

	object	The C instance.
	take_copy	False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns:

A C++ instance that wraps this C instance.

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The documentation for this class was generated from the following file:

• gdkmm/image.h