pub struct GLTextureBuilder { /* private fields */ }
v4_12
only.Expand description
GLTextureBuilder
is a builder used to construct Texture
objects from
GL textures.
The operation is quite simple: Create a texture builder, set all the necessary
properties - keep in mind that the properties context
,
id
, width
, and
height
are mandatory - and then call
build()
to create the new texture.
GLTextureBuilder
can be used for quick one-shot construction of
textures as well as kept around and reused to construct multiple textures.
§Properties
§context
The context owning the texture.
Readable | Writeable
§format
The format when downloading the texture.
Readable | Writeable
§has-mipmap
If the texture has a mipmap.
Readable | Writeable
§height
The height of the texture.
Readable | Writeable
§id
The texture ID to use.
Readable | Writeable
§sync
An optional GLSync
object.
If this is set, GTK will wait on it before using the texture.
Readable | Writeable
§update-region
The update region for update-texture
.
Readable | Writeable
§update-texture
The texture update-region
is an update for.
Readable | Writeable
§width
The width of the texture.
Readable | Writeable
GLib type: GObject with reference counted clone semantics.
Implementations§
Source§impl GLTextureBuilder
impl GLTextureBuilder
Sourcepub fn new() -> GLTextureBuilder
pub fn new() -> GLTextureBuilder
Sourcepub fn format(&self) -> MemoryFormat
pub fn format(&self) -> MemoryFormat
Sourcepub fn has_mipmap(&self) -> bool
pub fn has_mipmap(&self) -> bool
Sourcepub fn height(&self) -> i32
pub fn height(&self) -> i32
Gets the height previously set via gdk_gl_texture_builder_set_height() or 0 if the height wasn’t set.
§Returns
The height
Sourcepub fn id(&self) -> u32
pub fn id(&self) -> u32
Gets the texture id previously set via gdk_gl_texture_builder_set_id() or 0 if the id wasn’t set.
§Returns
The id
Sourcepub fn update_region(&self) -> Option<Region>
pub fn update_region(&self) -> Option<Region>
Sourcepub fn update_texture(&self) -> Option<Texture>
pub fn update_texture(&self) -> Option<Texture>
Source§impl GLTextureBuilder
impl GLTextureBuilder
Sourcepub unsafe fn build(self) -> Texture
pub unsafe fn build(self) -> Texture
Builds a new 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
GLTexture::release()
. It should release all GL resources associated
with the texture, such as the id
and the
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.
§Returns
a newly built Texture
pub unsafe fn build_with_release_func<F: FnOnce() + Send + 'static>( self, release_func: F, ) -> Texture
Sourcepub fn set_context(self, context: Option<&impl IsA<GLContext>>) -> Self
pub fn set_context(self, context: Option<&impl IsA<GLContext>>) -> Self
Sourcepub fn set_format(self, format: MemoryFormat) -> Self
pub fn set_format(self, format: MemoryFormat) -> Self
Sets the format of the texture. The default is GDK_MEMORY_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 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_MEMORY_R16G16B16A16_PREMULTIPLIED
is expected to be stored as GL_RGBA16
texture, and GDK_MEMORY_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.
§format
The texture’s format
Sourcepub fn set_has_mipmap(self, has_mipmap: bool) -> Self
pub fn set_has_mipmap(self, has_mipmap: bool) -> Self
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.
§has_mipmap
Whether the texture has a mipmap
Sourcepub fn set_height(self, height: i32) -> Self
pub fn set_height(self, height: i32) -> Self
Sourcepub fn set_update_region(self, region: Option<&Region>) -> Self
pub fn set_update_region(self, region: Option<&Region>) -> Self
Sets the region to be updated by this texture. Together with
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.
§region
the region to update
Sourcepub fn set_update_texture(self, texture: Option<&impl IsA<Texture>>) -> Self
pub fn set_update_texture(self, texture: Option<&impl IsA<Texture>>) -> Self
Sets the texture to be updated by this texture. See
set_update_region()
for an explanation.
§texture
the texture to update
Sourcepub fn set_sync(self, sync: Option<GLsync>) -> Self
pub fn set_sync(self, sync: Option<GLsync>) -> Self
Sets the GLSync object to use for the texture.
GTK will wait on this object before using the created 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.
§sync
the GLSync object
Trait Implementations§
Source§impl Clone for GLTextureBuilder
impl Clone for GLTextureBuilder
Source§impl Debug for GLTextureBuilder
impl Debug for GLTextureBuilder
Source§impl Default for GLTextureBuilder
impl Default for GLTextureBuilder
Source§impl HasParamSpec for GLTextureBuilder
impl HasParamSpec for GLTextureBuilder
type ParamSpec = ParamSpecObject
Source§type SetValue = GLTextureBuilder
type SetValue = GLTextureBuilder
type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, GLTextureBuilder>
fn param_spec_builder() -> Self::BuilderFn
Source§impl Hash for GLTextureBuilder
impl Hash for GLTextureBuilder
Source§impl Ord for GLTextureBuilder
impl Ord for GLTextureBuilder
Source§fn cmp(&self, other: &Self) -> Ordering
fn cmp(&self, other: &Self) -> Ordering
Comparison for two GObjects.
Compares the memory addresses of the provided objects.
1.21.0 · Source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
Source§impl ParentClassIs for GLTextureBuilder
impl ParentClassIs for GLTextureBuilder
Source§impl<OT: ObjectType> PartialEq<OT> for GLTextureBuilder
impl<OT: ObjectType> PartialEq<OT> for GLTextureBuilder
Source§impl<OT: ObjectType> PartialOrd<OT> for GLTextureBuilder
impl<OT: ObjectType> PartialOrd<OT> for GLTextureBuilder
Source§impl StaticType for GLTextureBuilder
impl StaticType for GLTextureBuilder
Source§fn static_type() -> Type
fn static_type() -> Type
Self
.impl Eq for GLTextureBuilder
impl Send for GLTextureBuilder
impl Sync for GLTextureBuilder
Auto Trait Implementations§
impl Freeze for GLTextureBuilder
impl RefUnwindSafe for GLTextureBuilder
impl Unpin for GLTextureBuilder
impl UnwindSafe for GLTextureBuilder
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