gtkmm: Gdk::MemoryTexture Class Reference
A Gdk::Texture representing image data in memory. More...
#include <gdkmm/memorytexture.h>
Public Types | |
enum | Format { Format::B8G8R8A8_PREMULTIPLIED, Format::A8R8G8B8_PREMULTIPLIED, Format::R8G8B8A8_PREMULTIPLIED, Format::B8G8R8A8, Format::A8R8G8B8, Format::R8G8B8A8, Format::A8B8G8R8, Format::R8G8B8, Format::B8G8R8, Format::N_FORMATS } |
Gdk::MemoryFormat describes a format that bytes 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 | Flags { Flags::STATIC_SIZE = 1 << 0, Flags::STATIC_CONTENTS = 1 << 1 } |
Flags about this 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::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 at the current (0,0) offset of the snapshot. 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 |
Applies the sizing algorithm outlined in https://drafts.csswg.org/css-images-3/#default-sizing to the given 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 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.
Constructor & Destructor Documentation
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noexcept |
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overridenoexcept |
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protected |
Member Function Documentation
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static |
Creates a new texture for a blob of image data.
The Bytes must contain stride x height pixels in the given format.
- Parameters
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width The width of the texture. height The height of the texture. format The format of the data. bytes The Bytes containing the pixel data. stride Rowstride for the data.
- Returns
- A newly-created Gdk::Texture.
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static |
Get the GType for this class, for use with the underlying GObject type system.
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inline |
Provides access to the underlying C GObject.
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inline |
Provides access to the underlying C GObject.
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.
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noexcept |
Friends And Related Function Documentation
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related |
A Glib::wrap() method for this object.
- Parameters
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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 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.