gtkmm 4.15.0

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

Gdk::GLTextureBuilder is a buider used to construct Gdk::Texture objects from GL textures. More...

`#include <gdkmm/gltexturebuilder.h>`

Inheritance diagram for Gdk::GLTextureBuilder:
[legend]

## Public Types
using | SlotGLTextureReleased = sigc::slot< void()>
| For instance, void on_gl_texture_released();.
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 Member Functions
| GLTextureBuilder (GLTextureBuilder &&src) noexcept
GLTextureBuilder & | operator= (GLTextureBuilder &&src) noexcept
| ~GLTextureBuilder () noexcept override
GdkGLTextureBuilder * | gobj ()
| Provides access to the underlying C GObject.
const GdkGLTextureBuilder * | gobj () const
| Provides access to the underlying C GObject.
GdkGLTextureBuilder * | gobj_copy ()
| Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.
Glib::RefPtr< GLContext > | get_context ()
| Gets the context previously set via set_context() or `nullptr` if none was set.
Glib::RefPtr< const GLContext > | get_context () const
| Gets the context previously set via set_context() or `nullptr` if none was set.
void | set_context (const Glib::RefPtr< GLContext > &context)
| Sets the context to be used for the texture.
guint | get_id () const
| Gets the texture id previously set via set_id() or 0 if the id wasn't set.
void | set_id (guint id)
| Sets the texture id of the texture.
int | get_width () const
| Gets the width previously set via set_width() or 0 if the width wasn't set.
void | set_width (int width)
| Sets the width of the texture.
int | get_height () const
| Gets the height previously set via set_height() or 0 if the height wasn't set.
void | set_height (int height)
| Sets the height of the texture.
MemoryFormat | get_format () const
| Gets the format previously set via set_format().
void | set_format (MemoryFormat format)
| Sets the format of the texture.
bool | get_has_mipmap () const
| Gets whether the texture has a mipmap.
void | set_has_mipmap (bool has_mipmap=true)
| Sets whether the texture has a mipmap.
void * | get_sync () const
| Gets the `Lsync` previously set via set_sync().
void | set_sync (void * sync)
| Sets the GLSync object to use for the texture.
Glib::RefPtr< ColorState > | get_color_state () const
| Gets the color state previously set via set_color_state().
void | set_color_state (const Glib::RefPtr< const ColorState > &color_state)
| Sets the color state for the texture.
Glib::RefPtr< Texture > | get_update_texture ()
| Gets the texture previously set via set_update_texture() or `nullptr` if none was set.
Glib::RefPtr< const Texture > | get_update_texture () const
| Gets the texture previously set via set_update_texture() or `nullptr` if none was set.
void | set_update_texture (const Glib::RefPtr< Texture > &texture)
| Sets the texture to be updated by this texture.
::Cairo::RefPtr< ::Cairo::Region > | get_update_region ()
| Gets the region previously set via set_update_region() or `nullptr` if none was set.
::Cairo::RefPtr< const ::Cairo::Region > | get_update_region () const
| Gets the region previously set via set_update_region() or `nullptr` if none was set.
void | set_update_region (const ::Cairo::RefPtr< ::Cairo::Region > &region)
| Sets the region to be updated by this texture.
Glib::RefPtr< Texture > | build (const SlotGLTextureReleased & slot={})
| Builds a new `Gdk::Texture` with the values set up in the builder.
Glib::PropertyProxy< Glib::RefPtr< GLContext > > | property_context ()
| The context owning the texture.
Glib::PropertyProxy_ReadOnly< Glib::RefPtr< GLContext > > | property_context () const
| The context owning the texture.
Glib::PropertyProxy< MemoryFormat > | property_format ()
| The format when downloading the texture.
Glib::PropertyProxy_ReadOnly< MemoryFormat > | property_format () const
| The format when downloading the texture.
Glib::PropertyProxy< bool > | property_has_mipmap ()
| If the texture has a mipmap.
Glib::PropertyProxy_ReadOnly< bool > | property_has_mipmap () const
| If the texture has a mipmap.
Glib::PropertyProxy< int > | property_height ()
| The height of the texture.
Glib::PropertyProxy_ReadOnly< int > | property_height () const
| The height of the texture.
Glib::PropertyProxy< guint > | property_id ()
| The texture ID to use.
Glib::PropertyProxy_ReadOnly< guint > | property_id () const
| The texture ID to use.
Glib::PropertyProxy< Glib::RefPtr< ColorState > > | property_color_state ()
| The color state of the texture.
Glib::PropertyProxy_ReadOnly< Glib::RefPtr< ColorState > > | property_color_state () const
| The color state of the texture.
Glib::PropertyProxy< ::Cairo::RefPtr< ::Cairo::Region > > | property_update_region ()
| The update region for property_update_texture().
Glib::PropertyProxy_ReadOnly< ::Cairo::RefPtr< ::Cairo::Region > > | property_update_region () const
| The update region for property_update_texture().
Glib::PropertyProxy< Glib::RefPtr< Texture > > | property_update_texture ()
| The texture property_update_region() is an update for.
Glib::PropertyProxy_ReadOnly< Glib::RefPtr< Texture > > | property_update_texture () const
| The texture property_update_region() is an update for.
Glib::PropertyProxy< int > | property_width ()
| The width of the texture.
Glib::PropertyProxy_ReadOnly< int > | property_width () const
| The width of the texture.
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_with_c_callback (const Quark &key, void *data, GDestroyNotify notify)
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

## Static Public Member Functions
static GType | get_type ()
| Get the GType for this class, for use with the underlying GObject type system.
static Glib::RefPtr< GLTextureBuilder > | create ()

## Protected Member Functions
| GLTextureBuilder ()
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)

## Related Symbols
(Note that these are not member symbols.)
Glib::RefPtr< Gdk::GLTextureBuilder > | wrap (GdkGLTextureBuilder *object, bool take_copy=false)
| A Glib::wrap() method for this object.

## Detailed Description

Gdk::GLTextureBuilder is a buider used to construct Gdk::Texture objects from GL textures.

The operation is quite simple: Create a texture builder, set all the necessary properties - keep in mind that property_context(), property_id(), property_width(), and property_height() are mandatory - and then call build() to create the new texture.

Gdk::GLTextureBuilder can be used for quick one-shot construction of textures as well as kept around and reused to construct multiple textures.

Since gtkmm 4.12:

## Member Typedef Documentation

## ◆ SlotGLTextureReleased

using Gdk::GLTextureBuilder::SlotGLTextureReleased = sigc::slot<void()>

For instance, void on_gl_texture_released();.

## Constructor & Destructor Documentation

## ◆ GLTextureBuilder() [1/2]

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

## ◆ ~GLTextureBuilder()

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

## ◆ GLTextureBuilder() [2/2]

Gdk::GLTextureBuilder::GLTextureBuilder | ( |  | ) |
| protected

## Member Function Documentation

## ◆ build()

Glib::RefPtr< Texture > Gdk::GLTextureBuilder::build | ( | const SlotGLTextureReleased & | slot = `{}` | ) |

Builds a new `Gdk::Texture` with the values set up in the builder.

The `destroy` function gets called when the returned texture gets released; either when the texture is finalized or by an explicit call to release(). It should release all GL resources associated with the texture, such as the property_id() and the property_sync().

Note that it is a programming error to call this function if any mandatory property has not been set.

It is possible to call this function multiple times to create multiple textures, possibly with changing properties in between.

Since gtkmm 4.12:

Parameters

  slot | Destroy function to be called when the texture is released.

Returns
  A newly built `Gdk::Texture`.

## ◆ create()

static Glib::RefPtr< GLTextureBuilder > Gdk::GLTextureBuilder::create | ( |  | ) |
| static

## ◆ get_color_state()

Glib::RefPtr< ColorState > Gdk::GLTextureBuilder::get_color_state | ( |  | ) | const

Gets the color state previously set via set_color_state().

Since gtkmm 4.16:

Returns
  The color state.

## ◆ get_context() [1/2]

Glib::RefPtr< GLContext > Gdk::GLTextureBuilder::get_context | ( |  | ) |

Gets the context previously set via set_context() or `nullptr` if none was set.

Since gtkmm 4.12:

Returns
  The context.

## ◆ get_context() [2/2]

Glib::RefPtr< const GLContext > Gdk::GLTextureBuilder::get_context | ( |  | ) | const

Gets the context previously set via set_context() or `nullptr` if none was set.

Since gtkmm 4.12:

Returns
  The context.

## ◆ get_format()

MemoryFormat Gdk::GLTextureBuilder::get_format | ( |  | ) | const

Gets the format previously set via set_format().

Since gtkmm 4.12:

Returns
  The format.

## ◆ get_has_mipmap()

bool Gdk::GLTextureBuilder::get_has_mipmap | ( |  | ) | const

Gets whether the texture has a mipmap.

Since gtkmm 4.12:

Returns
  Whether the texture has a mipmap.

## ◆ get_height()

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

Gets the height previously set via set_height() or 0 if the height wasn't set.

Since gtkmm 4.12:

Returns
  The height.

## ◆ get_id()

guint Gdk::GLTextureBuilder::get_id | ( |  | ) | const

Gets the texture id previously set via set_id() or 0 if the id wasn't set.

Since gtkmm 4.12:

Returns
  The id.

## ◆ get_sync()

void * Gdk::GLTextureBuilder::get_sync | ( |  | ) | const

Gets the `Lsync` previously set via set_sync().

Since gtkmm 4.12:

Returns
  The `LSync`.

## ◆ get_type()

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

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

## ◆ get_update_region() [1/2]

::Cairo::RefPtr< ::Cairo::Region > Gdk::GLTextureBuilder::get_update_region | ( |  | ) |

Gets the region previously set via set_update_region() or `nullptr` if none was set.

Since gtkmm 4.12:

Returns
  The region.

## ◆ get_update_region() [2/2]

::Cairo::RefPtr< const ::Cairo::Region > Gdk::GLTextureBuilder::get_update_region | ( |  | ) | const

Gets the region previously set via set_update_region() or `nullptr` if none was set.

Since gtkmm 4.12:

Returns
  The region.

## ◆ get_update_texture() [1/2]

Glib::RefPtr< Texture > Gdk::GLTextureBuilder::get_update_texture | ( |  | ) |

Gets the texture previously set via set_update_texture() or `nullptr` if none was set.

Since gtkmm 4.12:

Returns
  The texture.

## ◆ get_update_texture() [2/2]

Glib::RefPtr< const Texture > Gdk::GLTextureBuilder::get_update_texture | ( |  | ) | const

Gets the texture previously set via set_update_texture() or `nullptr` if none was set.

Since gtkmm 4.12:

Returns
  The texture.

## ◆ get_width()

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

Gets the width previously set via set_width() or 0 if the width wasn't set.

Since gtkmm 4.12:

Returns
  The width.

## ◆ gobj() [1/2]

GdkGLTextureBuilder * Gdk::GLTextureBuilder::gobj | ( |  | ) |
| inline

Provides access to the underlying C GObject.

## ◆ gobj() [2/2]

const GdkGLTextureBuilder * Gdk::GLTextureBuilder::gobj | ( |  | ) | const
| inline

Provides access to the underlying C GObject.

## ◆ gobj_copy()

GdkGLTextureBuilder * Gdk::GLTextureBuilder::gobj_copy | ( |  | ) |

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

## ◆ operator=()

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

## ◆ property_color_state() [1/2]

Glib::PropertyProxy< Glib::RefPtr< ColorState > > Gdk::GLTextureBuilder::property_color_state | ( |  | ) |

The color state of the texture.

Since gtkmm 4.16:

Returns
  A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

## ◆ property_color_state() [2/2]

Glib::PropertyProxy_ReadOnly< Glib::RefPtr< ColorState > > Gdk::GLTextureBuilder::property_color_state | ( |  | ) | const

The color state of the texture.

Since gtkmm 4.16:

Returns
  A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

## ◆ property_context() [1/2]

Glib::PropertyProxy< Glib::RefPtr< GLContext > > Gdk::GLTextureBuilder::property_context | ( |  | ) |

The context owning the texture.

Since gtkmm 4.12:

Returns
  A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

## ◆ property_context() [2/2]

Glib::PropertyProxy_ReadOnly< Glib::RefPtr< GLContext > > Gdk::GLTextureBuilder::property_context | ( |  | ) | const

The context owning the texture.

Since gtkmm 4.12:

Returns
  A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

## ◆ property_format() [1/2]

Glib::PropertyProxy< MemoryFormat > Gdk::GLTextureBuilder::property_format | ( |  | ) |

The format when downloading the texture.

Since gtkmm 4.12:

Default value: Gdk::MemoryFormat::R8G8B8A8_PREMULTIPLIED

Returns
  A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

## ◆ property_format() [2/2]

Glib::PropertyProxy_ReadOnly< MemoryFormat > Gdk::GLTextureBuilder::property_format | ( |  | ) | const

The format when downloading the texture.

Since gtkmm 4.12:

Default value: Gdk::MemoryFormat::R8G8B8A8_PREMULTIPLIED

Returns
  A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

## ◆ property_has_mipmap() [1/2]

Glib::PropertyProxy< bool > Gdk::GLTextureBuilder::property_has_mipmap | ( |  | ) |

If the texture has a mipmap.

Since gtkmm 4.12:

Default value: `false`

Returns
  A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

## ◆ property_has_mipmap() [2/2]

Glib::PropertyProxy_ReadOnly< bool > Gdk::GLTextureBuilder::property_has_mipmap | ( |  | ) | const

If the texture has a mipmap.

Since gtkmm 4.12:

Default value: `false`

Returns
  A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

## ◆ property_height() [1/2]

Glib::PropertyProxy< int > Gdk::GLTextureBuilder::property_height | ( |  | ) |

The height of the texture.

Since gtkmm 4.12:

Default value: 0

Returns
  A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

## ◆ property_height() [2/2]

Glib::PropertyProxy_ReadOnly< int > Gdk::GLTextureBuilder::property_height | ( |  | ) | const

The height of the texture.

Since gtkmm 4.12:

Default value: 0

Returns
  A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

## ◆ property_id() [1/2]

Glib::PropertyProxy< guint > Gdk::GLTextureBuilder::property_id | ( |  | ) |

The texture ID to use.

Since gtkmm 4.12:

Default value: 0

Returns
  A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

## ◆ property_id() [2/2]

Glib::PropertyProxy_ReadOnly< guint > Gdk::GLTextureBuilder::property_id | ( |  | ) | const

The texture ID to use.

Since gtkmm 4.12:

Default value: 0

Returns
  A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

## ◆ property_update_region() [1/2]

Glib::PropertyProxy< ::Cairo::RefPtr< ::Cairo::Region > > Gdk::GLTextureBuilder::property_update_region | ( |  | ) |

The update region for property_update_texture().

Since gtkmm 4.12:

Returns
  A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

## ◆ property_update_region() [2/2]

Glib::PropertyProxy_ReadOnly< ::Cairo::RefPtr< ::Cairo::Region > > Gdk::GLTextureBuilder::property_update_region | ( |  | ) | const

The update region for property_update_texture().

Since gtkmm 4.12:

Returns
  A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

## ◆ property_update_texture() [1/2]

Glib::PropertyProxy< Glib::RefPtr< Texture > > Gdk::GLTextureBuilder::property_update_texture | ( |  | ) |

The texture property_update_region() is an update for.

Since gtkmm 4.12:

Returns
  A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

## ◆ property_update_texture() [2/2]

Glib::PropertyProxy_ReadOnly< Glib::RefPtr< Texture > > Gdk::GLTextureBuilder::property_update_texture | ( |  | ) | const

The texture property_update_region() is an update for.

Since gtkmm 4.12:

Returns
  A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

## ◆ property_width() [1/2]

Glib::PropertyProxy< int > Gdk::GLTextureBuilder::property_width | ( |  | ) |

The width of the texture.

Since gtkmm 4.12:

Default value: 0

Returns
  A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

## ◆ property_width() [2/2]

Glib::PropertyProxy_ReadOnly< int > Gdk::GLTextureBuilder::property_width | ( |  | ) | const

The width of the texture.

Since gtkmm 4.12:

Default value: 0

Returns
  A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

## ◆ set_color_state()

void Gdk::GLTextureBuilder::set_color_state | ( | const Glib::RefPtr< const ColorState > & | color_state | ) |

Sets the color state for the texture.

By default, the sRGB colorstate is used. If you don't know what colorstates are, this is probably the right thing.

Since gtkmm 4.16:

Parameters

  color_state | A `Gdk::ColorState`.

## ◆ set_context()

void Gdk::GLTextureBuilder::set_context | ( | const Glib::RefPtr< GLContext > & | context | ) |

Sets the context to be used for the texture.

This is the context that owns the texture.

The context must be set before calling build().

Since gtkmm 4.12:

Parameters

  context | The context the texture belongs to or `nullptr` to unset.

## ◆ set_format()

void Gdk::GLTextureBuilder::set_format | ( | MemoryFormat | format | ) |

Sets the format of the texture.

The default is `Gdk::MemoryFormat::R8G8B8A8_PREMULTIPLIED`.

The format is the preferred format the texture data should be downloaded to. The format must be supported by the GL version of property_context().

GDK's texture download code assumes that the format corresponds to the storage parameters of the GL texture in an obvious way. For example, a format of `Gdk::MemoryFormat::R16G16B16A16_PREMULTIPLIED` is expected to be stored as `GL_RGBA16` texture, and `Gdk::MemoryFormat::G8A8` is expected to be stored as `GL_RG8` texture.

Setting the right format is particularly useful when using high bit depth textures to preserve the bit depth, to set the correct value for unpremultiplied textures and to make sure opaque textures are treated as such.

Non-RGBA textures need to have swizzling parameters set up properly to be usable in GSK's shaders.

Since gtkmm 4.12:

Parameters

  format | The texture's format.

## ◆ set_has_mipmap()

void Gdk::GLTextureBuilder::set_has_mipmap | ( | bool | has_mipmap = `true` | ) |

Sets whether the texture has a mipmap.

This allows the renderer and other users of the generated texture to use a higher quality downscaling.

Typically, the `glGenerateMipmap` function is used to generate a mimap.

Since gtkmm 4.12:

Parameters

  has_mipmap | Whether the texture has a mipmap.

## ◆ set_height()

void Gdk::GLTextureBuilder::set_height | ( | int | height | ) |

Sets the height of the texture.

The height must be set before calling build().

Since gtkmm 4.12:

Parameters

  height | The texture's height or 0 to unset.

## ◆ set_id()

void Gdk::GLTextureBuilder::set_id | ( | guint | id | ) |

Sets the texture id of the texture.

The texture id must remain unmodified until the texture was finalized. See build() for a longer discussion.

The id must be set before calling build().

Since gtkmm 4.12:

Parameters

  id | The texture id to be used for creating the texture.

## ◆ set_sync()

void Gdk::GLTextureBuilder::set_sync | ( | void * | sync | ) |

Sets the GLSync object to use for the texture.

GTK will wait on this object before using the created `Gdk::Texture`.

The `destroy` function that is passed to build() is responsible for freeing the sync object when it is no longer needed. The texture builder does not destroy it and it is the callers responsibility to make sure it doesn't leak.

Since gtkmm 4.12:

Parameters

  sync | The GLSync object.

## ◆ set_update_region()

void Gdk::GLTextureBuilder::set_update_region | ( | const ::Cairo::RefPtr< ::Cairo::Region > & | region | ) |

Sets the region to be updated by this texture.

Together with property_update_texture() this describes an update of a previous texture.

When rendering animations of large textures, it is possible that consecutive textures are only updating contents in parts of the texture. It is then possible to describe this update via these two properties, so that GTK can avoid rerendering parts that did not change.

An example would be a screen recording where only the mouse pointer moves.

Since gtkmm 4.12:

Parameters

  region | The region to update.

## ◆ set_update_texture()

void Gdk::GLTextureBuilder::set_update_texture | ( | const Glib::RefPtr< Texture > & | texture | ) |

Sets the texture to be updated by this texture.

See set_update_region() for an explanation.

Since gtkmm 4.12:

Parameters

  texture | The texture to update.

## ◆ set_width()

void Gdk::GLTextureBuilder::set_width | ( | int | width | ) |

Sets the width of the texture.

The width must be set before calling build().

Since gtkmm 4.12:

Parameters

  width | The texture's width or 0 to unset.

## Friends And Related Symbol Documentation

## ◆ wrap()

Glib::RefPtr< Gdk::GLTextureBuilder > wrap | ( | GdkGLTextureBuilder * | 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.