gtkmm: Gdk::Pixbuf Class Reference

gtkmm 2.24.4

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Gdk::Pixbuf Class Reference
Inheritance diagram for Gdk::Pixbuf:
[legend]
Collaboration diagram for Gdk::Pixbuf:
[legend]

## Public Types
typedef sigc::slot< void, const guint8* > | SlotDestroyData
typedef Glib::SListHandle< Glib::RefPtr< PixbufFormat >, PixbufFormatTraits > | SListHandle_PixbufFormat
Public Types inherited from Glib::Object
typedef void(*)(gpointer data | DestroyNotify)
Public Types inherited from sigc::trackable
typedef internal::func_destroy_notify | func_destroy_notify

## Public Member Functions
| Pixbuf (Pixbuf&& src) noexcept
Pixbuf& | operator= (Pixbuf&& src) noexcept
| ~Pixbuf () noexceptoverride
GdkPixbuf* | gobj ()
| Provides access to the underlying C GObject. More...
const GdkPixbuf* | gobj () const
| Provides access to the underlying C GObject. More...
GdkPixbuf* | gobj_copy ()
| Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
Glib::RefPtr< Pixbuf > | copy () const
Colorspace | get_colorspace () const
int | get_n_channels () const
bool | get_has_alpha () const
int | get_bits_per_sample () const
guint8* | get_pixels () const
int | get_width () const
int | get_height () const
int | get_rowstride () const
void | fill (guint32 pixel)
void | save (const std::string& filename, const Glib::ustring& type)
| Saves pixbuf to a file in format type. More...
void | save (const std::string& filename, const Glib::ustring& type, const Glib::StringArrayHandle& option_keys, const Glib::StringArrayHandle& option_values)
| Saves pixbuf to a file in format type. More...
void | save_to_buffer (gchar*& buffer, gsize& buffer_size, const Glib::ustring& type="png")
void | save_to_buffer (gchar*& buffer, gsize& buffer_size, const Glib::ustring& type, const Glib::StringArrayHandle& option_keys, const Glib::StringArrayHandle& option_values)
Glib::RefPtr< Gdk::Pixbuf > | add_alpha (bool substitute_color, guint8 r, guint8 g, guint8 b) const
void | copy_area (int src_x, int src_y, int width, int height, const Glib::RefPtr< Gdk::Pixbuf >& dest_pixbuf, int dest_x, int dest_y) const
void | saturate_and_pixelate (const Glib::RefPtr< Gdk::Pixbuf >& dest, float saturation, bool pixelate) const
void | scale (const Glib::RefPtr< Gdk::Pixbuf >& dest, int dest_x, int dest_y, int dest_width, int dest_height, double offset_x, double offset_y, double scale_x, double scale_y, InterpType interp_type) const
void | composite (const Glib::RefPtr< Gdk::Pixbuf >& dest, int dest_x, int dest_y, int dest_width, int dest_height, double offset_x, double offset_y, double scale_x, double scale_y, InterpType interp_type, int overall_alpha) const
void | composite_color (const Glib::RefPtr< Gdk::Pixbuf >& dest, int dest_x, int dest_y, int dest_width, int dest_height, double offset_x, double offset_y, double scale_x, double scale_y, InterpType interp_type, int overall_alpha, int check_x, int check_y, int check_size, guint32 color1, guint32 color2) const
Glib::RefPtr< Gdk::Pixbuf > | scale_simple (int dest_width, int dest_height, InterpType interp_type) const
Glib::RefPtr< Gdk::Pixbuf > | composite_color_simple (int dest_width, int dest_height, InterpType interp_type, int overall_alpha, int check_size, guint32 color1, guint32 color2) const
Glib::RefPtr< Gdk::Pixbuf > | rotate_simple (PixbufRotation angle) const
Glib::RefPtr< Gdk::Pixbuf > | flip (bool horizontal=true) const
void | render_threshold_alpha (const Glib::RefPtr< Gdk::Bitmap >& bitmap, int src_x, int src_y, int dest_x, int dest_y, int width, int height, int alpha_threshold)
| Takes the opacity values in a rectangular portion of a pixbuf and thresholds them to produce a bi-level alpha mask that can be used as a clipping mask for a drawable. More...
void | render_to_drawable (const Glib::RefPtr< Drawable >& drawable, const Glib::RefPtr< Gdk::GC >& gc, int src_x, int src_y, int dest_x, int dest_y, int width, int height, RgbDither dither, int x_dither, int y_dither)
| Renders a rectangular portion of a pixbuf to a drawable while using the specified GC. More...
void | render_to_drawable_alpha (const Glib::RefPtr< Drawable >& drawable, int src_x, int src_y, int dest_x, int dest_y, int width, int height, PixbufAlphaMode alpha_mode, int alpha_threshold, RgbDither dither, int x_dither, int y_dither)
| Renders a rectangular portion of a pixbuf to a drawable. More...
void | render_pixmap_and_mask_for_colormap (const Glib::RefPtr< Colormap >& colormap, Glib::RefPtr< Pixmap >& pixmap_return, Glib::RefPtr< Bitmap >& mask_return, int alpha_threshold)
void | render_pixmap_and_mask (Glib::RefPtr< Pixmap >& pixmap_return, Glib::RefPtr< Bitmap >& mask_return, int alpha_threshold)
Glib::ustring | get_option (const Glib::ustring& key) const
Public Member Functions inherited from Glib::Object
| Object (const Object &)=delete
Object & | operator= (const Object &)=delete
| Object (Object &&src) noexcept
Object & | operator= (Object &&src) noexcept
void * | get_data (const QueryQuark &key)
void | set_data (const Quark &key, void *data)
void | set_data (const Quark &key, void *data, DestroyNotify notify)
void | remove_data (const QueryQuark &quark)
void * | steal_data (const QueryQuark &quark)
Glib::RefPtr< Glib::Object > | wrap (GObject *object, bool take_copy=false)
Public Member Functions inherited from Glib::ObjectBase
| ObjectBase (const ObjectBase &)=delete
ObjectBase & | operator= (const ObjectBase &)=delete
void | set_property_value (const Glib::ustring &property_name, const Glib::ValueBase &value)
void | get_property_value (const Glib::ustring &property_name, Glib::ValueBase &value) const
void | set_property (const Glib::ustring &property_name, const PropertyType &value)
void | get_property (const Glib::ustring &property_name, PropertyType &value) const
void | connect_property_changed (const Glib::ustring &property_name, const sigc::slot< void > &slot)
void | connect_property_changed (const Glib::ustring &property_name, sigc::slot< void > &&slot)
sigc::connection | connect_property_changed_with_return (const Glib::ustring &property_name, const sigc::slot< void > &slot)
sigc::connection | connect_property_changed_with_return (const Glib::ustring &property_name, sigc::slot< void > &&slot)
void | freeze_notify ()
void | thaw_notify ()
virtual void | reference () const
virtual void | unreference () const
GObject * | gobj ()
const GObject * | gobj () const
GObject * | gobj_copy () const
Public Member Functions inherited from sigc::trackable
| trackable () noexcept
| trackable (const trackable &src) noexcept
| trackable (trackable &&src)
| ~trackable ()
void | add_destroy_notify_callback (void *data, func_destroy_notify func) const
void | notify_callbacks ()
trackable & | operator= (const trackable &src)
trackable & | operator= (trackable &&src)
void | remove_destroy_notify_callback (void *data) const

## Static Public Member Functions
static GType | get_type ()
| Get the GType for this class, for use with the underlying GObject type system. More...
static Glib::RefPtr< Gdk::Pixbuf > | create (const Glib::RefPtr< Drawable >& src, const Glib::RefPtr< Colormap >& cmap, int src_x, int src_y, int dest_x, int dest_y, int width, int height)
static Glib::RefPtr< Gdk::Pixbuf > | create (const Glib::RefPtr< Image >& src, const Glib::RefPtr< Colormap >& cmap, int src_x, int src_y, int dest_x, int dest_y, int width, int height)
static Glib::RefPtr< Pixbuf > | create (const Glib::RefPtr< Drawable >& src, const Glib::RefPtr< Colormap >& cmap, int src_x, int src_y, int width, int height)
| Creates a pixbuf object from a drawable. More...
static Glib::RefPtr< Pixbuf > | create (const Glib::RefPtr< Drawable >& src, int src_x, int src_y, int width, int height)
| Creates a pixbuf object from a drawable, using the colormap from the drawable. More...
static Glib::RefPtr< Pixbuf > | create (const Glib::RefPtr< Image >& src, const Glib::RefPtr< Colormap >& cmap, int src_x, int src_y, int width, int height)
| Creates a pixbuf object from an image. More...
static Glib::RefPtr< Pixbuf > | create (const Glib::RefPtr< Image >& src, int src_x, int src_y, int width, int height)
| Creates a pixbuf object from an image, using the colormap from the image. More...
static Glib::RefPtr< Pixbuf > | create (Colorspace colorspace, bool has_alpha, int bits_per_sample, int width, int height)
static Glib::RefPtr< Pixbuf > | create_subpixbuf (const Glib::RefPtr< Pixbuf >& src_pixbuf, int src_x, int src_y, int width, int height)
static Glib::RefPtr< Pixbuf > | create_from_file (const std::string& filename)
| Creates a new pixbuf by loading an image from a file. More...
static Glib::RefPtr< Pixbuf > | create_from_file (const std::string& filename, int width, int height, bool preserve_aspect_ratio=true)
| Creates a new pixbuf by loading an image from a file. More...
static Glib::RefPtr< Pixbuf > | create_from_data (const guint8* data, Colorspace colorspace, bool has_alpha, int bits_per_sample, int width, int height, int rowstride)
| Creates a new Gdk::Pixbuf out of in-memory image data. More...
static Glib::RefPtr< Pixbuf > | create_from_data (const guint8* data, Colorspace colorspace, bool has_alpha, int bits_per_sample, int width, int height, int rowstride, const SlotDestroyData& destroy_slot)
| Creates a new Gdk::Pixbuf out of in-memory image data. More...
static Glib::RefPtr< Pixbuf > | create_from_xpm_data (const char* const* data)
static Glib::RefPtr< Pixbuf > | create_from_inline (int data_length, const guint8* data, bool copy_pixels=false)
| Create a Gdk::Pixbuf from a flat representation that is suitable for storing as inline data in a program. More...
static Glib::RefPtr< Pixbuf > | create_from_stream (const Glib::RefPtr< Gio::InputStream >& stream, const Glib::RefPtr< Gio::Cancellable >& cancelable)
static Glib::RefPtr< Pixbuf > | create_from_stream (const Glib::RefPtr< Gio::InputStream >& stream)
static Glib::RefPtr< Pixbuf > | create_from_stream_at_scale (const Glib::RefPtr< Gio::InputStream >& stream, int width, int height, bool preserve_aspect_ratio, const Glib::RefPtr< Gio::Cancellable >& cancelable)
static Glib::RefPtr< Pixbuf > | create_from_stream_at_scale (const Glib::RefPtr< Gio::InputStream >& stream, int width, int height, bool preserve_aspect_ratio)
static SListHandle_PixbufFormat | get_formats ()
| Obtains the available information about the image formats supported by GdkPixbuf. More...

## Protected Member Functions
| Pixbuf (const Glib::RefPtr< Drawable >& src, const Glib::RefPtr< Colormap >& cmap, int src_x, int src_y, int width, int height)
| Creates a pixbuf object from a drawable. More...
| Pixbuf (const Glib::RefPtr< Drawable >& src, int src_x, int src_y, int width, int height)
| Creates a pixbuf object from a drawable, using the colormap from the drawable. More...
| Pixbuf (const Glib::RefPtr< Drawable >& src, const Glib::RefPtr< Colormap >& cmap, int src_x, int src_y, int dest_x, int dest_y, int width, int height)
| Pixbuf (const Glib::RefPtr< Image >& src, const Glib::RefPtr< Colormap >& cmap, int src_x, int src_y, int width, int height)
| Creates a pixbuf object from an image. More...
| Pixbuf (const Glib::RefPtr< Image >& src, int src_x, int src_y, int width, int height)
| Creates a pixbuf object from an image, using the colormap from the image. More...
| Pixbuf (const Glib::RefPtr< Image >& src, const Glib::RefPtr< Colormap >& cmap, int src_x, int src_y, int dest_x, int dest_y, int width, int height)
Protected Member Functions inherited from Glib::Object
| Object ()
| Object (const Glib::ConstructParams &construct_params)
| Object (GObject *castitem)
| ~Object () noexceptoverride
Protected Member Functions inherited from Glib::ObjectBase
| ObjectBase ()
| ObjectBase (const char *custom_type_name)
| ObjectBase (const std::type_info &custom_type_info)
| ObjectBase (ObjectBase &&src) noexcept
ObjectBase & | operator= (ObjectBase &&src) noexcept
virtual | ~ObjectBase () noexcept=0
void | initialize (GObject *castitem)
void | initialize_move (GObject *castitem, Glib::ObjectBase *previous_wrapper)

## Related Functions
(Note that these are not member functions.)
Glib::RefPtr< Gdk::Pixbuf > | wrap (GdkPixbuf* object, bool take_copy=false)
| A Glib::wrap() method for this object. More...

## Member Typedef Documentation

typedef Glib::SListHandle< Glib::RefPtr<PixbufFormat>, PixbufFormatTraits > Gdk::Pixbuf::SListHandle_PixbufFormat

typedef sigc::slot<void, const guint8*> Gdk::Pixbuf::SlotDestroyData

## Constructor & Destructor Documentation

Gdk::Pixbuf::Pixbuf | ( | Pixbuf&& | src | ) |
| noexcept

Gdk::Pixbuf::~Pixbuf | ( |  | ) |
| overridenoexcept

Gdk::Pixbuf::Pixbuf | ( | const Glib::RefPtr< Drawable >& | src,
|  | const Glib::RefPtr< Colormap >& | cmap,
|  | int | src_x,
|  | int | src_y,
|  | int | width,
|  | int | height
| ) |  |
| protected

Creates a pixbuf object from a drawable.

Transfers image data from a Drawable and converts it to an RGB(A) representation inside a Pixbuf. In other words, copies image data from a server-side drawable to a client-side RGB(A) buffer. This allows you to efficiently read individual pixels on the client side.

If the drawable has no colormap (See Gdk::Drawable::get_colormap()), then a suitable colormap must be specified. Otherwise, you may use the constructor that takes no colormap argument. Typically a Gdk::Window or a pixmap created by passing a Gdk:Window to the Gdk::Pixbuf constructor will already have a colormap associated with it. If the drawable is a bitmap (1 bit per pixel pixmap), then a colormap is not required; pixels with a value of 1 are assumed to be white, and pixels with a value of 0 are assumed to be black. For taking screenshots, Gdk::Colormap::get_system() returns the correct colormap to use.

This will create an RGB pixbuf with 8 bits per channel and no alpha, with the same size specified by the width and height arguments.

If the specified drawable is a pixmap, then the requested source rectangle must be completely contained within the pixmap, otherwise the constructor will fail. For pixmaps only (not for windows) passing -1 for width or height is allowed to mean the full width or height of the pixmap.

If the specified drawable is a window, and the window is off the screen, then there is no image data in the obscured/offscreen regions to be placed in the pixbuf. The contents of portions of the pixbuf corresponding to the offscreen region are undefined.

If the window you're obtaining data from is partially obscured by other windows, then the contents of the pixbuf areas corresponding to the obscured regions are undefined.

See alo Gdk::Drawable::get_image().

Parameters

  src | Source drawable.
  cmap | A colormap.
  src_x | Source X coordinate within drawable.
  src_y | Source Y coordinate within drawable.
  width | Width in pixels of region to get.
  height | Height in pixels of region to get.

Since gtkmm 2.12:

Gdk::Pixbuf::Pixbuf | ( | const Glib::RefPtr< Drawable >& | src,
|  | int | src_x,
|  | int | src_y,
|  | int | width,
|  | int | height
| ) |  |
| protected

Creates a pixbuf object from a drawable, using the colormap from the drawable.

Parameters

  src | Source drawable.
  src_x | Source X coordinate within drawable.
  src_y | Source Y coordinate within drawable.
  width | Width in pixels of region to get.
  height | Height in pixels of region to get.

Since gtkmm 2.12:

Gdk::Pixbuf::Pixbuf | ( | const Glib::RefPtr< Drawable >& | src,
|  | const Glib::RefPtr< Colormap >& | cmap,
|  | int | src_x,
|  | int | src_y,
|  | int | dest_x,
|  | int | dest_y,
|  | int | width,
|  | int | height
| ) |  |
| protected

Deprecated:
  Use the constructor without dest_x and dest_y parameters.

Gdk::Pixbuf::Pixbuf | ( | const Glib::RefPtr< Image >& | src,
|  | const Glib::RefPtr< Colormap >& | cmap,
|  | int | src_x,
|  | int | src_y,
|  | int | width,
|  | int | height
| ) |  |
| protected

Creates a pixbuf object from an image.

Parameters

  src | Source Image.
  cmap | A colormap.
  src_x | Source X coordinate within the image.
  src_y | Source Y coordinate within the image.
  width | Width in pixels of region to get.
  height | Height in pixels of region to get.

Since gtkmm 2.12:

Gdk::Pixbuf::Pixbuf | ( | const Glib::RefPtr< Image >& | src,
|  | int | src_x,
|  | int | src_y,
|  | int | width,
|  | int | height
| ) |  |
| protected

Creates a pixbuf object from an image, using the colormap from the image.

Parameters

  src | Source Image.
  src_x | Source X coordinate within the image.
  src_y | Source Y coordinate within the image.
  width | Width in pixels of region to get.
  height | Height in pixels of region to get.

Gdk::Pixbuf::Pixbuf | ( | const Glib::RefPtr< Image >& | src,
|  | const Glib::RefPtr< Colormap >& | cmap,
|  | int | src_x,
|  | int | src_y,
|  | int | dest_x,
|  | int | dest_y,
|  | int | width,
|  | int | height
| ) |  |
| protected

Deprecated:
  Use the constructors without dest_x and dest_y parameters.

## Member Function Documentation

Glib::RefPtr<Gdk::Pixbuf> Gdk::Pixbuf::add_alpha | ( | bool | substitute_color,
|  | guint8 | r,
|  | guint8 | g,
|  | guint8 | b
| ) |  | const

void Gdk::Pixbuf::composite | ( | const Glib::RefPtr< Gdk::Pixbuf >& | dest,
|  | int | dest_x,
|  | int | dest_y,
|  | int | dest_width,
|  | int | dest_height,
|  | double | offset_x,
|  | double | offset_y,
|  | double | scale_x,
|  | double | scale_y,
|  | InterpType | interp_type,
|  | int | overall_alpha
| ) |  | const

void Gdk::Pixbuf::composite_color | ( | const Glib::RefPtr< Gdk::Pixbuf >& | dest,
|  | int | dest_x,
|  | int | dest_y,
|  | int | dest_width,
|  | int | dest_height,
|  | double | offset_x,
|  | double | offset_y,
|  | double | scale_x,
|  | double | scale_y,
|  | InterpType | interp_type,
|  | int | overall_alpha,
|  | int | check_x,
|  | int | check_y,
|  | int | check_size,
|  | guint32 | color1,
|  | guint32 | color2
| ) |  | const

Glib::RefPtr<Gdk::Pixbuf> Gdk::Pixbuf::composite_color_simple | ( | int | dest_width,
|  | int | dest_height,
|  | InterpType | interp_type,
|  | int | overall_alpha,
|  | int | check_size,
|  | guint32 | color1,
|  | guint32 | color2
| ) |  | const

Glib::RefPtr<Pixbuf> Gdk::Pixbuf::copy | ( |  | ) | const

void Gdk::Pixbuf::copy_area | ( | int | src_x,
|  | int | src_y,
|  | int | width,
|  | int | height,
|  | const Glib::RefPtr< Gdk::Pixbuf >& | dest_pixbuf,
|  | int | dest_x,
|  | int | dest_y
| ) |  | const

static Glib::RefPtr<Gdk::Pixbuf> Gdk::Pixbuf::create | ( | const Glib::RefPtr< Drawable >& | src,
|  | const Glib::RefPtr< Colormap >& | cmap,
|  | int | src_x,
|  | int | src_y,
|  | int | dest_x,
|  | int | dest_y,
|  | int | width,
|  | int | height
| ) |  |
| static

Deprecated:
  Use the create() methods that don't have the unused dest_x and dest_y parameters.

static Glib::RefPtr<Gdk::Pixbuf> Gdk::Pixbuf::create | ( | const Glib::RefPtr< Image >& | src,
|  | const Glib::RefPtr< Colormap >& | cmap,
|  | int | src_x,
|  | int | src_y,
|  | int | dest_x,
|  | int | dest_y,
|  | int | width,
|  | int | height
| ) |  |
| static

Deprecated:
  Use the create() methods that that don't have the unused dest_x and dest_y parameters.

static Glib::RefPtr<Pixbuf> Gdk::Pixbuf::create | ( | const Glib::RefPtr< Drawable >& | src,
|  | const Glib::RefPtr< Colormap >& | cmap,
|  | int | src_x,
|  | int | src_y,
|  | int | width,
|  | int | height
| ) |  |
| static

Creates a pixbuf object from a drawable.

Transfers image data from a Drawable and converts it to an RGB(A) representation inside a Pixbuf. In other words, copies image data from a server-side drawable to a client-side RGB(A) buffer. This allows you to efficiently read individual pixels on the client side.

If the drawable has no colormap (See Gdk::Drawable::get_colormap()), then a suitable colormap must be specified. Otherwise, you may use the constructor that takes no colormap argument. Typically a Gdk::Window or a pixmap created by passing a Gdk:Window to the Gdk::Pixbuf constructor will already have a colormap associated with it. If the drawable is a bitmap (1 bit per pixel pixmap), then a colormap is not required; pixels with a value of 1 are assumed to be white, and pixels with a value of 0 are assumed to be black. For taking screenshots, Gdk::Colormap::get_system() returns the correct colormap to use.

This will create an RGB pixbuf with 8 bits per channel and no alpha, with the same size specified by the width and height arguments.

If the specified drawable is a pixmap, then the requested source rectangle must be completely contained within the pixmap, otherwise the constructor will fail. For pixmaps only (not for windows) passing -1 for width or height is allowed to mean the full width or height of the pixmap.

If the specified drawable is a window, and the window is off the screen, then there is no image data in the obscured/offscreen regions to be placed in the pixbuf. The contents of portions of the pixbuf corresponding to the offscreen region are undefined.

If the window you're obtaining data from is partially obscured by other windows, then the contents of the pixbuf areas corresponding to the obscured regions are undefined.

See alo Gdk::Drawable::get_image().

Parameters

  src | Source drawable.
  cmap | A colormap.
  src_x | Source X coordinate within drawable.
  src_y | Source Y coordinate within drawable.
  width | Width in pixels of region to get.
  height | Height in pixels of region to get.

Since gtkmm 2.12:

static Glib::RefPtr<Pixbuf> Gdk::Pixbuf::create | ( | const Glib::RefPtr< Drawable >& | src,
|  | int | src_x,
|  | int | src_y,
|  | int | width,
|  | int | height
| ) |  |
| static

Creates a pixbuf object from a drawable, using the colormap from the drawable.

Parameters

  src | Source drawable.
  src_x | Source X coordinate within drawable.
  src_y | Source Y coordinate within drawable.
  width | Width in pixels of region to get.
  height | Height in pixels of region to get.

Since gtkmm 2.12:

static Glib::RefPtr<Pixbuf> Gdk::Pixbuf::create | ( | const Glib::RefPtr< Image >& | src,
|  | const Glib::RefPtr< Colormap >& | cmap,
|  | int | src_x,
|  | int | src_y,
|  | int | width,
|  | int | height
| ) |  |
| static

Creates a pixbuf object from an image.

Parameters

  src | Source Image.
  cmap | A colormap.
  src_x | Source X coordinate within the image.
  src_y | Source Y coordinate within the image.
  width | Width in pixels of region to get.
  height | Height in pixels of region to get.

Since gtkmm 2.12:

static Glib::RefPtr<Pixbuf> Gdk::Pixbuf::create | ( | const Glib::RefPtr< Image >& | src,
|  | int | src_x,
|  | int | src_y,
|  | int | width,
|  | int | height
| ) |  |
| static

Creates a pixbuf object from an image, using the colormap from the image.

Parameters

  src | Source Image.
  src_x | Source X coordinate within the image.
  src_y | Source Y coordinate within the image.
  width | Width in pixels of region to get.
  height | Height in pixels of region to get.

static Glib::RefPtr<Pixbuf> Gdk::Pixbuf::create | ( | Colorspace | colorspace,
|  | bool | has_alpha,
|  | int | bits_per_sample,
|  | int | width,
|  | int | height
| ) |  |
| static

static Glib::RefPtr<Pixbuf> Gdk::Pixbuf::create_from_data | ( | const guint8 * | data,
|  | Colorspace | colorspace,
|  | bool | has_alpha,
|  | int | bits_per_sample,
|  | int | width,
|  | int | height,
|  | int | rowstride
| ) |  |
| static

Creates a new Gdk::Pixbuf out of in-memory image data.

Currently only RGB images with 8 bits per sample are supported.

Parameters

  data | Image data in 8-bit/sample packed format.
  colorspace | Colorspace for the image data.
  has_alpha | Whether the data has an opacity channel.
  bits_per_sample | Number of bits per sample.
  width | Width of the image in pixels.
  height | Height of the image in pixels.
  rowstride | Distance in bytes between rows.

Returns
  A newly-created Gdk::Pixbuf object.

static Glib::RefPtr<Pixbuf> Gdk::Pixbuf::create_from_data | ( | const guint8 * | data,
|  | Colorspace | colorspace,
|  | bool | has_alpha,
|  | int | bits_per_sample,
|  | int | width,
|  | int | height,
|  | int | rowstride,
|  | const SlotDestroyData& | destroy_slot
| ) |  |
| static

Creates a new Gdk::Pixbuf out of in-memory image data.

Currently only RGB images with 8 bits per sample are supported.

Parameters

  data | Image data in 8-bit/sample packed format.
  colorspace | Colorspace for the image data.
  has_alpha | Whether the data has an opacity channel.
  bits_per_sample | Number of bits per sample.
  width | Width of the image in pixels.
  height | Height of the image in pixels.
  rowstride | Distance in bytes between rows.
  destroy_slot | Slot used to free the data when the pixbuf's reference count drops to zero.

Returns
  A newly-created Gdk::Pixbuf object.

static Glib::RefPtr<Pixbuf> Gdk::Pixbuf::create_from_file | ( | const std::string & | filename | ) |
| static

Creates a new pixbuf by loading an image from a file.

The file format is detected automatically.

Parameters

  filename | The path to the pixbuf file.

Exceptions

  Glib::FileError |
  Gdk::PixbufError |

static Glib::RefPtr<Pixbuf> Gdk::Pixbuf::create_from_file | ( | const std::string & | filename,
|  | int | width,
|  | int | height,
|  | bool | preserve_aspect_ratio = `true`
| ) |  |
| static

Creates a new pixbuf by loading an image from a file.

The file format is detected automatically. The image will be scaled to fit in the requested size.

Parameters

  filename | The path to the pixbuf file.
  width | The desired width
  height | The desired height
  preserve_aspect_ratio | Whether the image's aspect ratio will be preserved when scaling.

Exceptions

  Glib::FileError |
  Gdk::PixbufError |

static Glib::RefPtr<Pixbuf> Gdk::Pixbuf::create_from_inline | ( | int | data_length,
|  | const guint8 * | data,
|  | bool | copy_pixels = `false`
| ) |  |
| static

Create a Gdk::Pixbuf 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.

GTK+ ships with a program called `gdk-pixbuf-csource` which allows for conversion of GdkPixbufs into such a inline representation. In almost all cases, you should pass the `–raw` flag 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, since things will always succeed. 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.

Parameters

  data_length | Length in bytes of the data argument.
  data | Byte data containing a serialized GdkPixdata structure.
  copy_pixels | Whether to copy the pixel data, or use direct pointers to data for the resulting pixbuf.

Exceptions

  Gdk::PixbufError |

static Glib::RefPtr<Pixbuf> Gdk::Pixbuf::create_from_stream | ( | const Glib::RefPtr< Gio::InputStream > & | stream,
|  | const Glib::RefPtr< Gio::Cancellable > & | cancelable
| ) |  |
| static

static Glib::RefPtr<Pixbuf> Gdk::Pixbuf::create_from_stream | ( | const Glib::RefPtr< Gio::InputStream > & | stream | ) |
| static

static Glib::RefPtr<Pixbuf> Gdk::Pixbuf::create_from_stream_at_scale | ( | const Glib::RefPtr< Gio::InputStream > & | stream,
|  | int | width,
|  | int | height,
|  | bool | preserve_aspect_ratio,
|  | const Glib::RefPtr< Gio::Cancellable > & | cancelable
| ) |  |
| static

static Glib::RefPtr<Pixbuf> Gdk::Pixbuf::create_from_stream_at_scale | ( | const Glib::RefPtr< Gio::InputStream > & | stream,
|  | int | width,
|  | int | height,
|  | bool | preserve_aspect_ratio
| ) |  |
| static

static Glib::RefPtr<Pixbuf> Gdk::Pixbuf::create_from_xpm_data | ( | const char *const * | data | ) |
| static

static Glib::RefPtr<Pixbuf> Gdk::Pixbuf::create_subpixbuf | ( | const Glib::RefPtr< Pixbuf >& | src_pixbuf,
|  | int | src_x,
|  | int | src_y,
|  | int | width,
|  | int | height
| ) |  |
| static

Parameters

  dummy | Dummy parameter, this is a static function but the name idicates a class, so this one will be stripped not the actual first parameter.
  src_pixbuf | A Gdk::Pixbuf.
  src_x | X coord in src_pixbuf.
  src_y | Y coord in src_pixbuf.
  width | Width of region in src_pixbuf.
  height | Height of region in src_pixbuf.

void Gdk::Pixbuf::fill | ( | guint32 | pixel | ) |

Glib::RefPtr<Gdk::Pixbuf> Gdk::Pixbuf::flip | ( | bool | horizontal = `true` | ) | const

int Gdk::Pixbuf::get_bits_per_sample | ( |  | ) | const

Colorspace Gdk::Pixbuf::get_colorspace | ( |  | ) | const

static SListHandle_PixbufFormat Gdk::Pixbuf::get_formats | ( |  | ) |
| static

Obtains the available information about the image formats supported by GdkPixbuf.

Returns
  A list of PixbufFormats describing the supported image formats.

bool Gdk::Pixbuf::get_has_alpha | ( |  | ) | const

int Gdk::Pixbuf::get_height | ( |  | ) | const

int Gdk::Pixbuf::get_n_channels | ( |  | ) | const

Glib::ustring Gdk::Pixbuf::get_option | ( | const Glib::ustring & | key | ) | const

guint8* Gdk::Pixbuf::get_pixels | ( |  | ) | const

int Gdk::Pixbuf::get_rowstride | ( |  | ) | const

static GType Gdk::Pixbuf::get_type | ( |  | ) |
| static

Get the GType for this class, for use with the underlying GObject type system.

int Gdk::Pixbuf::get_width | ( |  | ) | const

GdkPixbuf* Gdk::Pixbuf::gobj | ( |  | ) |
| inline

Provides access to the underlying C GObject.

const GdkPixbuf* Gdk::Pixbuf::gobj | ( |  | ) | const
| inline

Provides access to the underlying C GObject.

GdkPixbuf* Gdk::Pixbuf::gobj_copy | ( |  | ) |

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

Pixbuf& Gdk::Pixbuf::operator= | ( | Pixbuf&& | src | ) |
| noexcept

void Gdk::Pixbuf::render_pixmap_and_mask | ( | Glib::RefPtr< Pixmap >& | pixmap_return,
|  | Glib::RefPtr< Bitmap >& | mask_return,
|  | int | alpha_threshold
| ) |  |

void Gdk::Pixbuf::render_pixmap_and_mask_for_colormap | ( | const Glib::RefPtr< Colormap >& | colormap,
|  | Glib::RefPtr< Pixmap >& | pixmap_return,
|  | Glib::RefPtr< Bitmap >& | mask_return,
|  | int | alpha_threshold
| ) |  |

void Gdk::Pixbuf::render_threshold_alpha | ( | const Glib::RefPtr< Gdk::Bitmap >& | bitmap,
|  | int | src_x,
|  | int | src_y,
|  | int | dest_x,
|  | int | dest_y,
|  | int | width,
|  | int | height,
|  | int | alpha_threshold
| ) |  |

Takes the opacity values in a rectangular portion of a pixbuf and thresholds them to produce a bi-level alpha mask that can be used as a clipping mask for a drawable.

Parameters

  bitmap | Bitmap where the bilevel mask will be painted to.
  src_x | Source X coordinate.
  src_y | Source Y coordinate.
  dest_x | Destination X coordinate.
  dest_y | Destination Y coordinate.
  width | Width of region to threshold, or -1 to use pixbuf width.
  height | Height of region to threshold, or -1 to use pixbuf height.
  alpha_threshold | Opacity values below this will be painted as zero; all other values will be painted as one.

void Gdk::Pixbuf::render_to_drawable | ( | const Glib::RefPtr< Drawable >& | drawable,
|  | const Glib::RefPtr< Gdk::GC >& | gc,
|  | int | src_x,
|  | int | src_y,
|  | int | dest_x,
|  | int | dest_y,
|  | int | width,
|  | int | height,
|  | RgbDither | dither,
|  | int | x_dither,
|  | int | y_dither
| ) |  |

Renders a rectangular portion of a pixbuf to a drawable while using the specified GC.

This is done using GdkRGB, so the specified drawable must have the GdkRGB visual and colormap. Note that this function will ignore the opacity information for images with an alpha channel; the GC must already have the clipping mask set if you want transparent regions to show through.

For an explanation of dither offsets, see the GdkRGB documentation. In brief, the dither offset is important when re-rendering partial regions of an image to a rendered version of the full image, or for when the offsets to a base position change, as in scrolling. The dither matrix has to be shifted for consistent visual results. If you do not have any of these cases, the dither offsets can be both zero.

Deprecated: 2.4: This function is obsolete. Use gdk_draw_pixbuf() instead.

Deprecated:
  Use Gdk::Drawable::draw_pixbuf() instead.

Parameters

  drawable | Destination drawable.
  gc | GC used for rendering.
  src_x | Source X coordinate within pixbuf.
  src_y | Source Y coordinate within pixbuf.
  dest_x | Destination X coordinate within drawable.
  dest_y | Destination Y coordinate within drawable.
  width | Width of region to render, in pixels, or -1 to use pixbuf width.
  height | Height of region to render, in pixels, or -1 to use pixbuf height.
  dither | Dithering mode for GdkRGB.
  x_dither | X offset for dither.
  y_dither | Y offset for dither.

void Gdk::Pixbuf::render_to_drawable_alpha | ( | const Glib::RefPtr< Drawable >& | drawable,
|  | int | src_x,
|  | int | src_y,
|  | int | dest_x,
|  | int | dest_y,
|  | int | width,
|  | int | height,
|  | PixbufAlphaMode | alpha_mode,
|  | int | alpha_threshold,
|  | RgbDither | dither,
|  | int | x_dither,
|  | int | y_dither
| ) |  |

Renders a rectangular portion of a pixbuf to a drawable.

The destination drawable must have a colormap. All windows have a colormap, however, pixmaps only have colormap by default if they were created with a non-`nullptr` window argument. Otherwise a colormap must be set on them with gdk_drawable_set_colormap.

On older X servers, rendering pixbufs with an alpha channel involves round trips to the X server, and may be somewhat slow.

Deprecated: 2.4: This function is obsolete. Use gdk_draw_pixbuf() instead.

Deprecated:
  Use Gdk::Drawable::draw_pixbuf() instead.

Parameters

  drawable | Destination drawable.
  src_x | Source X coordinate within pixbuf.
  src_y | Source Y coordinates within pixbuf.
  dest_x | Destination X coordinate within drawable.
  dest_y | Destination Y coordinate within drawable.
  width | Width of region to render, in pixels, or -1 to use pixbuf width.
  height | Height of region to render, in pixels, or -1 to use pixbuf height.
  alpha_mode | Ignored. Present for backwards compatibility.
  alpha_threshold | Ignored. Present for backwards compatibility.
  dither | Dithering mode for GdkRGB.
  x_dither | X offset for dither.
  y_dither | Y offset for dither.

Glib::RefPtr<Gdk::Pixbuf> Gdk::Pixbuf::rotate_simple | ( | PixbufRotation | angle | ) | const

void Gdk::Pixbuf::saturate_and_pixelate | ( | const Glib::RefPtr< Gdk::Pixbuf >& | dest,
|  | float | saturation,
|  | bool | pixelate
| ) |  | const

void Gdk::Pixbuf::save | ( | const std::string & | filename,
|  | const Glib::ustring & | type
| ) |  |

Saves pixbuf to a file in format type.

By default, "jpeg", "png", "ico" and "bmp" are possible file formats to save in, but more formats may be installed. The list of all writable formats can be determined by using get_formats() with is_writable().

Parameters

  filename | The path of the file to be created.
  type | The file type.

Exceptions

  Glib::FileError |
  Gdk::PixbufError |

void Gdk::Pixbuf::save | ( | const std::string & | filename,
|  | const Glib::ustring & | type,
|  | const Glib::StringArrayHandle & | option_keys,
|  | const Glib::StringArrayHandle & | option_values
| ) |  |

Saves pixbuf to a file in format type.

By default, "jpeg", "png", "ico" and "bmp" are possible file formats to save in, but more formats may be installed. TThe list of all writable formats can be determined by using get_formats() with Gdk::PixbufFormat::is_writable().

The option_keys and , if not empty, should contain pairs of strings that modify the save parameters. For example, "quality", "100".

Currently only a few parameters exist. JPEG images can be saved with a "quality" parameter; its value should be in the range [0,100]. Text chunks can be attached to PNG images by specifying parameters of the form "tEXt::key", where key is an ASCII string of length 1-79. The values are UTF-8 encoded strings. ICO images can be saved in depth 16, 24, or 32, by using the "depth" parameter. When the ICO saver is given "x_hot" and "y_hot" parameters, it produces a CUR instead of an ICO.

Parameters

  filename | The path of the file to be created.
  type | The file type.
  option_keys |
  option_values |

Exceptions

  Glib::FileError |
  Gdk::PixbufError |

void Gdk::Pixbuf::save_to_buffer | ( | gchar *& | buffer,
|  | gsize & | buffer_size,
|  | const Glib::ustring & | type = `"png"`
| ) |  |

void Gdk::Pixbuf::save_to_buffer | ( | gchar *& | buffer,
|  | gsize & | buffer_size,
|  | const Glib::ustring & | type,
|  | const Glib::StringArrayHandle & | option_keys,
|  | const Glib::StringArrayHandle & | option_values
| ) |  |

void Gdk::Pixbuf::scale | ( | const Glib::RefPtr< Gdk::Pixbuf >& | dest,
|  | int | dest_x,
|  | int | dest_y,
|  | int | dest_width,
|  | int | dest_height,
|  | double | offset_x,
|  | double | offset_y,
|  | double | scale_x,
|  | double | scale_y,
|  | InterpType | interp_type
| ) |  | const

Glib::RefPtr<Gdk::Pixbuf> Gdk::Pixbuf::scale_simple | ( | int | dest_width,
|  | int | dest_height,
|  | InterpType | interp_type
| ) |  | const

## Friends And Related Function Documentation

Glib::RefPtr< Gdk::Pixbuf > wrap | ( | GdkPixbuf * | 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.

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

- gdkmm/pixbuf.h