gtkmm 4.7.1

Public Types | Public Member Functions | Static Public Member Functions | Static Public Attributes | Protected Member Functions | Related Functions | List of all members
Gdk::MemoryTexture Class Reference

A Gdk::Texture representing image data in memory. More...

`#include <gdkmm/memorytexture.h>`

Inheritance diagram for Gdk::MemoryTexture:
[legend]

## Public Types
enum class | Format { B8G8R8A8_PREMULTIPLIED , A8R8G8B8_PREMULTIPLIED , R8G8B8A8_PREMULTIPLIED , B8G8R8A8 , A8R8G8B8 , R8G8B8A8 , A8B8G8R8 , R8G8B8 , B8G8R8 , R16G16B16 , R16G16B16A16_PREMULTIPLIED , R16G16B16A16 , R16G16B16_FLOAT , R16G16B16A16_FLOAT_PREMULTIPLIED , R16G16B16A16_FLOAT , R32G32B32_FLOAT , R32G32B32A32_FLOAT_PREMULTIPLIED , R32G32B32A32_FLOAT , N_FORMATS }
| `Gdk::MemoryFormat` describes formats that image data can have in memory. More...
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 Types inherited from sigc::notifiable
typedef internal::func_destroy_notify | func_destroy_notify
Public Types inherited from Gdk::Paintable
enum class | Flags { STATIC_SIZE = 1 << 0 , STATIC_CONTENTS = 1 << 1 }
| Flags about a paintable object. More...

## Public Member Functions
| MemoryTexture (MemoryTexture && src) noexcept
MemoryTexture & | operator= (MemoryTexture && src) noexcept
| ~MemoryTexture () noexcept override
GdkMemoryTexture * | gobj ()
| Provides access to the underlying C GObject. More...
const GdkMemoryTexture * | gobj () const
| Provides access to the underlying C GObject. More...
GdkMemoryTexture * | gobj_copy ()
| Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
Public Member Functions inherited from Gdk::Texture
| Texture (Texture && src) noexcept
Texture & | operator= (Texture && src) noexcept
| ~Texture () noexcept override
GdkTexture * | gobj ()
| Provides access to the underlying C GObject. More...
const GdkTexture * | gobj () const
| Provides access to the underlying C GObject. More...
GdkTexture * | gobj_copy ()
| Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
int | get_width () const
| Returns the width of texture, in pixels. More...
int | get_height () const
| Returns the height of the texture, in pixels. More...
void | download (guchar *data, gsize stride) const
| Downloads the texture into local memory. More...
bool | save_to_png (const Glib::ustring & filename) const
| Store the given texture to the filename as a PNG file. More...
Glib::RefPtr< Glib::Bytes > | save_to_png_bytes () const
| Store the given texture in memory as a PNG file. More...
bool | save_to_tiff (const std::string & filename) const
| Store the given texture to the filename as a TIFF file. More...
Glib::RefPtr< Glib::Bytes > | save_to_tiff_bytes () const
| Store the given texture in memory as a TIFF file. More...
Glib::PropertyProxy_ReadOnly< int > | property_width () const
| The width of the texture, in pixels. More...
Glib::PropertyProxy_ReadOnly< int > | property_height () const
| The height of the texture, in pixels. More...
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
PropertyType | get_property (const Glib::ustring &property_name) const
sigc::connection | connect_property_changed (const Glib::ustring &property_name, const sigc::slot< void()> &slot)
sigc::connection | connect_property_changed (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) noexcept
| ~trackable ()
void | add_destroy_notify_callback (notifiable *data, func_destroy_notify func) const
void | notify_callbacks ()
trackable & | operator= (const trackable &src)
trackable & | operator= (trackable &&src) noexcept
void | remove_destroy_notify_callback (notifiable *data) const
Public Member Functions inherited from Gdk::Paintable
| Paintable (Paintable && src) noexcept
Paintable & | operator= (Paintable && src) noexcept
| ~Paintable () noexcept override
GdkPaintable * | gobj ()
| Provides access to the underlying C GObject. More...
const GdkPaintable * | gobj () const
| Provides access to the underlying C GObject. More...
void | snapshot (const Glib::RefPtr< Gdk::Snapshot > & snapshot, double width, double height)
| Snapshots the given paintable with the given width and height. More...
Glib::RefPtr< const Paintable > | get_current_image () const
| Gets an immutable paintable for the current contents displayed by paintable. More...
Flags | get_flags () const
| Get flags for the paintable. More...
int | get_intrinsic_width () const
| Gets the preferred width the paintable would like to be displayed at. More...
int | get_intrinsic_height () const
| Gets the preferred height the paintable would like to be displayed at. More...
double | get_intrinsic_aspect_ratio () const
| Gets the preferred aspect ratio the paintable would like to be displayed at. More...
void | compute_concrete_size (double specified_width, double specified_height, double default_width, double default_height, double & concrete_width, double & concrete_height) const
| Compute a concrete size for the `Gdk::Paintable`. More...
void | invalidate_contents ()
| Called by implementations of `Gdk::Paintable` to invalidate their contents. More...
void | invalidate_size ()
| Called by implementations of `Gdk::Paintable` to invalidate their size. More...
Glib::SignalProxy< void()> | signal_invalidate_contents ()
Glib::SignalProxy< void()> | signal_invalidate_size ()
Public Member Functions inherited from Glib::Interface
| Interface ()
| Interface (Interface &&src) noexcept
Interface & | operator= (Interface &&src) noexcept
| Interface (const Glib::Interface_Class &interface_class)
| Interface (GObject *castitem)
| ~Interface () noexcept override
| Interface (const Interface &)=delete
Interface & | operator= (const Interface &)=delete
GObject * | gobj ()
const GObject * | gobj () 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< Texture > | create (int width, int height, Format format, const Glib::RefPtr< const Glib::Bytes > & bytes, gsize stride)
| Creates a new texture for a blob of image data. More...
Static Public Member Functions inherited from Gdk::Texture
static GType | get_type ()
| Get the GType for this class, for use with the underlying GObject type system. More...
static Glib::RefPtr< Texture > | create_for_pixbuf (const Glib::RefPtr< Pixbuf > & pixbuf)
| Creates a new texture object representing the `Gdk::Pixbuf`. More...
static Glib::RefPtr< Texture > | create_from_resource (const std::string & resource_path)
| Creates a new texture by loading an image from a resource. More...
static Glib::RefPtr< Texture > | create_from_file (const Glib::RefPtr< Gio::File > & file)
| Creates a new texture by loading an image from a file. More...
static Glib::RefPtr< Texture > | create_from_filename (const std::string & path)
| Creates a new texture by loading an image from a file. More...
static Glib::RefPtr< Texture > | create_from_bytes (const Glib::RefPtr< const Glib::Bytes > & bytes)
| Creates a new texture by loading an image from memory,. More...
Static Public Member Functions inherited from Gdk::Paintable
static void | add_interface (GType gtype_implementer)
static GType | get_type ()
| Get the GType for this class, for use with the underlying GObject type system. More...

## Static Public Attributes
static const Format | DEFAULT_FORMAT = static_cast<Format>(GDK_MEMORY_DEFAULT)
| Default memory format used by GTK. More...

## Protected Member Functions
| MemoryTexture ()
Protected Member Functions inherited from Gdk::Texture
| Texture ()
Protected Member Functions inherited from Glib::Object
| Object ()
| Object (const Glib::ConstructParams &construct_params)
| Object (GObject *castitem)
| ~Object () noexcept override
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)
Protected Member Functions inherited from Gdk::Paintable
| Paintable ()
| You should derive from this class to use it. More...
virtual void | snapshot_vfunc (const Glib::RefPtr< Gdk::Snapshot > &snapshot, double width, double height)
virtual Glib::RefPtr< Paintable > | get_current_image_vfunc () const
virtual Flags | get_flags_vfunc () const
virtual int | get_intrinsic_width_vfunc () const
virtual int | get_intrinsic_height_vfunc () const
virtual double | get_intrinsic_aspect_ratio_vfunc () const

## Related Functions
(Note that these are not member functions.)
Glib::RefPtr< Gdk::MemoryTexture > | wrap (GdkMemoryTexture * object, bool take_copy=false)
| A Glib::wrap() method for this object. More...
Related Functions inherited from Gdk::Texture
Glib::RefPtr< Gdk::Texture > | wrap (GdkTexture * object, bool take_copy=false)
| A Glib::wrap() method for this object. More...
Related Functions inherited from Gdk::Paintable
Glib::RefPtr< Gdk::Paintable > | wrap (GdkPaintable * object, bool take_copy=false)
| A Glib::wrap() method for this object. More...

## Detailed Description

A Gdk::Texture representing image data in memory.

Since gtkmm 3.98:

## Constructor & Destructor Documentation

## ◆ MemoryTexture() [1/2]

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

## ◆ ~MemoryTexture()

Gdk::MemoryTexture::~MemoryTexture | ( |  | ) |
| override noexcept

## ◆ MemoryTexture() [2/2]

Gdk::MemoryTexture::MemoryTexture | ( |  | ) |
| protected

## Member Function Documentation

## ◆ create()

static Glib::RefPtr<Texture> Gdk::MemoryTexture::create | ( | int | width,
|  | int | height,
|  | Format | format,
|  | const Glib::RefPtr< const Glib::Bytes > & | bytes,
|  | gsize | stride
| ) |  |
| static

Creates a new texture for a blob of image data.

The `Glib::Bytes` must contain stride × height pixels in the given format.

Parameters

  width | The width of the texture.
  height | The height of the texture.
  format | The format of the data.
  bytes | The `Glib::Bytes` containing the pixel data.
  stride | Rowstride for the data.

Returns
  A newly-created `Gdk::Texture`.

## ◆ get_type()

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

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

## ◆ gobj() [1/2]

GdkMemoryTexture* Gdk::MemoryTexture::gobj | ( |  | ) |
| inline

Provides access to the underlying C GObject.

## ◆ gobj() [2/2]

const GdkMemoryTexture* Gdk::MemoryTexture::gobj | ( |  | ) | const
| inline

Provides access to the underlying C GObject.

## ◆ gobj_copy()

GdkMemoryTexture* Gdk::MemoryTexture::gobj_copy | ( |  | ) |

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

## ◆ operator=()

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

## Friends And Related Function Documentation

## ◆ wrap()

Glib::RefPtr< Gdk::MemoryTexture > wrap | ( | GdkMemoryTexture * | 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.

## Member Data Documentation

## ◆ DEFAULT_FORMAT

const Format Gdk::MemoryTexture::DEFAULT_FORMAT = static_cast<Format>(GDK_MEMORY_DEFAULT)
| static

Default memory format used by GTK.

It is the format provided by Gdk::Texture::download(). It is equal to Cairo::Surface::Format::ARGB32.

Be aware that unlike the Format values, this format is different for different endianness.