pub enum FlatlandRequest {
Show 32 variants
Present {
args: PresentArgs,
control_handle: FlatlandControlHandle,
},
CreateView {
token: ViewCreationToken,
parent_viewport_watcher: ServerEnd<ParentViewportWatcherMarker>,
control_handle: FlatlandControlHandle,
},
CreateView2 {
token: ViewCreationToken,
view_identity: ViewIdentityOnCreation,
protocols: ViewBoundProtocols,
parent_viewport_watcher: ServerEnd<ParentViewportWatcherMarker>,
control_handle: FlatlandControlHandle,
},
CreateTransform {
transform_id: TransformId,
control_handle: FlatlandControlHandle,
},
SetTranslation {
transform_id: TransformId,
translation: Vec_,
control_handle: FlatlandControlHandle,
},
SetOrientation {
transform_id: TransformId,
orientation: Orientation,
control_handle: FlatlandControlHandle,
},
SetScale {
transform_id: TransformId,
scale: VecF,
control_handle: FlatlandControlHandle,
},
SetOpacity {
transform_id: TransformId,
value: f32,
control_handle: FlatlandControlHandle,
},
SetClipBoundary {
transform_id: TransformId,
rect: Option<Box<Rect>>,
control_handle: FlatlandControlHandle,
},
AddChild {
parent_transform_id: TransformId,
child_transform_id: TransformId,
control_handle: FlatlandControlHandle,
},
RemoveChild {
parent_transform_id: TransformId,
child_transform_id: TransformId,
control_handle: FlatlandControlHandle,
},
SetRootTransform {
transform_id: TransformId,
control_handle: FlatlandControlHandle,
},
SetHitRegions {
transform_id: TransformId,
regions: Vec<HitRegion>,
control_handle: FlatlandControlHandle,
},
SetInfiniteHitRegion {
transform_id: TransformId,
hit_test: HitTestInteraction,
control_handle: FlatlandControlHandle,
},
CreateViewport {
viewport_id: ContentId,
token: ViewportCreationToken,
properties: ViewportProperties,
child_view_watcher: ServerEnd<ChildViewWatcherMarker>,
control_handle: FlatlandControlHandle,
},
CreateImage {
image_id: ContentId,
import_token: BufferCollectionImportToken,
vmo_index: u32,
properties: ImageProperties,
control_handle: FlatlandControlHandle,
},
SetImageSampleRegion {
image_id: ContentId,
rect: RectF,
control_handle: FlatlandControlHandle,
},
SetImageDestinationSize {
image_id: ContentId,
size: SizeU,
control_handle: FlatlandControlHandle,
},
SetImageBlendingFunction {
image_id: ContentId,
blend_mode: BlendMode,
control_handle: FlatlandControlHandle,
},
SetImageOpacity {
image_id: ContentId,
val: f32,
control_handle: FlatlandControlHandle,
},
SetImageFlip {
image_id: ContentId,
flip: ImageFlip,
control_handle: FlatlandControlHandle,
},
CreateFilledRect {
rect_id: ContentId,
control_handle: FlatlandControlHandle,
},
SetSolidFill {
rect_id: ContentId,
color: ColorRgba,
size: SizeU,
control_handle: FlatlandControlHandle,
},
ReleaseFilledRect {
rect_id: ContentId,
control_handle: FlatlandControlHandle,
},
SetContent {
transform_id: TransformId,
content_id: ContentId,
control_handle: FlatlandControlHandle,
},
SetViewportProperties {
viewport_id: ContentId,
properties: ViewportProperties,
control_handle: FlatlandControlHandle,
},
ReleaseTransform {
transform_id: TransformId,
control_handle: FlatlandControlHandle,
},
ReleaseView {
control_handle: FlatlandControlHandle,
},
ReleaseViewport {
viewport_id: ContentId,
responder: FlatlandReleaseViewportResponder,
},
ReleaseImage {
image_id: ContentId,
control_handle: FlatlandControlHandle,
},
Clear {
control_handle: FlatlandControlHandle,
},
SetDebugName {
name: String,
control_handle: FlatlandControlHandle,
},
}Expand description
Each Flatland instance contains a Graph, which consists of a set of objects, and the relationships between those objects. The client can specify a subset of those objects (specifically, the directed acyclic graph starting at the root transform) to be presented as content to some kind of output – usually, a display.
Flatland Graphs are both hierarchical, and distributed. Graphs from different Flatland instances may be connected together, allowing multiple processes to be involved in authoring content for a particular output.
All functions in this protocol are feed-forward. The operations they represent are not fully
executed until [Present] is called.
Variants§
Present
Complete execution of all feed-forward operations.
If executing an operation produces an error (e.g., CreateTransform(0)), an [OnError] event
is emitted. Operations that produce errors are ignored and the channel is closed.
If the execution is completed successfully, [OnNextFrameBegin] emits NO_ERROR along
with other valid fields.
The client may only call [Present] when they have a non-zero number of present credits,
which are tracked by the server. The server may increment the number of credits when it
fires the [OnNextFrameBegin] event, which informs the client when it receives additional
present credits. Each [Present] call uses one present credit and decrements the server
count by one. If the client calls [Present] with no present credits, the server will
return a NO_PRESENTS_REMAINING error.
The client should assume that prior to receiving any [OnNextFrameBegin] events, they have
one present credit.
Every [Present] call results in one [OnNextFrameBegin] event, and one
[OnFramePresented] event, typically in that order.
When the commands flushed by [Present] make it to display, an [OnFramePresented] event
is fired. This event includes information pertaining to all [Present]s that had content
that were part of that frame.
See [fuchsia.ui.composition/PresentArgs] documentation above for more detailed information
on what arguments are passed in and their role.
CreateView
Two Flatland instances may be connected in a parent-child relationship. The parent endpoint is held in a Viewport, and the child endpoint is held in a View. The parent Flatland instance that creates a Viewport has control over how the child’s View is integrated into its own View.
The lifecycle of a parent-child connection starts with two endpoints of a channel object:
a ViewportCreationToken and a ViewCreationToken. Out-of-band protocols pass the
ViewportCreationToken to the parent, which calls [CreateViewport], and the
ViewCreationToken to the child, which calls [CreateView].
Only nodes connected to the Root Transform in this Flatland instance will be rendered into the parent’s Viewport.
Calling [CreateView] a second time will disconnect the Root Transform from the existing
parent’s Viewport, and attach it to a new parent’s Viewport. In other words, each View can
only have one parent.
This function is queued, meaning that the Root Transform will not be attached to the
parent Viewport until [Present] is called. However, clients will receive information
through their ParentViewportWatcher (e.g., LayoutInfo) immediately after calling this
function, even if they have not called [Present] or [SetRootTransform]. This allows
clients to wait for layout information from their parent before calling [Present].
Any illegal operations on ParentViewportWatcher will cause both ParentViewportWatcher channel and this Flatland channel to be torn down.
Lifecycle note. The lifetime of the ParentViewportWatcher channel is bound by the peer ViewportCreationToken. When the ViewportCreationToken dies, this ParentViewportWatcher channel is destroyed.
Views and subgraphs of Views created using CreateView will not be represented in the
ViewTree, and hence will not be able to participate in any ViewTree-dependent interactions
such as touch, mouse or focus.
The Flatland protocol provides no way for Views in the subgraph of a View created with
CreateView to know that they are excluded from the ViewTree.
Fields
token: ViewCreationTokenparent_viewport_watcher: ServerEnd<ParentViewportWatcherMarker>control_handle: FlatlandControlHandleCreateView2
Identical to [CreateView], except it allows association of View identity (ViewRef) and
view-bound protocols.
Fields
token: ViewCreationTokenview_identity: ViewIdentityOnCreationprotocols: ViewBoundProtocolsparent_viewport_watcher: ServerEnd<ParentViewportWatcherMarker>control_handle: FlatlandControlHandleCreateTransform
Creates a new Transform node. Transforms are a hierarchical piece of a Flatland graph. They can have children, and can reference Content. A sub-graph represented by a Transform and its descendants can be rendered to a display.
Transforms are kept alive, even when released, as long as they are children of either an unreleased Transform, or the Root Transform.
Each Transform can have a single piece of attached Content. Common types of Content include bitmaps, asynchronous streams of images, and Viewports to Views hosted in other Flatland instances.
Transforms have attributes. Child Transforms inherit the combined attributes of their parents. Content attached to a Transform is also affected by that Transform’s attributes.
When a sub-graph of Transforms is rendered, Content will be rendered back-to-front, starting
with the Content on the root transform, and continuing recursively through all of its child
Transforms in the order the children were added. See [AddChild] for more information.
Zero is not a valid transform id. All other values are valid, assuming they are not already
in use (see [ReleaseTransform] for more details).
SetTranslation
All Transform objects support all attributes.
Geometric attributes are applied in the following order:
- Scale (relative to the parent transform’s coordinate space)
- Orientation (relative to the parent transform’s coordinate space)
- Translation (relative to the parent transforms’s coordinate space, unaffected by scale applied to the current transform).
- Clipping (relative to the current transform’s coordinate space)
The effects of each of these attributes are cumulative. This means the transform’s position in the view space, and its clip boundary, will be calculated based on that chain of geometric attributes going up to the root transform.
For instance, in a nested hierarchy such as the following: [Root-Transform -> Transform1 -> Transform2 -> CurrentTransform] If Transform1 is translated by [2,0] and Transform2 is translated by [0,1] then the view-space position of CurrentTransform will be [2,1].
Sets the translation on a Transform. The order of geometric attribute application is addressed above.
SetOrientation
Sets the orientation on a Transform. The order of geometric attribute application is
addressed in the documentation for [SetTranslation]. In Flatland, the +X axis is
to the right and the +Y axis is down. There is no notion of a Z axis. CCW is defined
from the POV of the user, as if a skeuomorphoic clock is displayed on the screen.
SetScale
Sets the scale on a transform. The order of geometric attribute application is addressed above. The (x,y) values in the VecF |scale| refer to the scale factor in the x-axis (width) and y-axis (height) respectively. Scale values must be normal 32-bit floating point values: https://en.wikipedia.org/wiki/Normal_number_%28computing%29
SetOpacity
Sets an opacity in linear space to be applied to a transform and its descendents, which include other transforms and content. Opacity values must be in the range of [0.0, 1.0], where 0.0 is completely transparent and 1.0 is completely opaque. Attempting to call this function with values outside that range will result in an error. A transform’s opacity value is multiplied with that of its parent. This effect works differently from group opacity. Using group opacity, child nodes are rendered together first, and then have the parent’s opacity applied as a post-effect. Here, opacity is applied to each child individually. This may result in a very different effect.
SetClipBoundary
Sets the bounds, expressed in the local coordinate space of the transform, that constrains the region that content attached to this transform can be rendered to. If the content’s area exceeds the clip bounds, the area outside the bounds will not be rendered. These bounds are valid for all children of this transform node as well, which includes nested Flatland instances and their node hierarchies. If a child transform attempts to set clip bounds larger than that of its parent, it will be clipped to the parent’s clip bounds. The default state is for a transform to be unclipped, meaning it will not have any bounds placed on its render region. The clip width/height must be positive. Negative values will result in an error. Passing in an empty box to the |rect| parameter will remove the clip bounds.
AddChild
Adds a child Transform to a parent Transform. The new child Transform, and any Content attached to it or its children, will be rendered on top of the parent’s Content, as well as any previously added children.
Fields
parent_transform_id: TransformIdchild_transform_id: TransformIdcontrol_handle: FlatlandControlHandleRemoveChild
Removes a child Transform from a parent Transform.
Fields
parent_transform_id: TransformIdchild_transform_id: TransformIdcontrol_handle: FlatlandControlHandleSetRootTransform
Sets the Root Transform for the graph.
The sub-graph defined by the Root Transform and its children will be rendered as View
in the connected parent’s Viewport (see [CreateView]). Any parents of the Root Transform
in this Graph will be ignored.
The Root Transform, and all children of the Root Transform, are kept alive if they are
released (see [ReleaseTransform] for more details).
There is only ever one Root. Since 0 is not a valid transform id (see [CreateTransform]),
calling SetRootTransform(0) clears the current Root, destroying any previously released
objects that are not referenced by the new root.
Note that every View has a clip boundary equivalent to its logical size. Anything outside that clip boundary will not be rendered. Hence, the Root Transform has a useful coordinate space of (0, 0) to (logical_size.width, logical_size.height), where (0, 0) is the upper left corner.
Setting the root transform installs a full screen hit region on the root transform. Clients
may remove this hit region if they don’t want users to be able to interact with the root
transform’s content. For additional details on hit regions, see the [SetHitRegions]
documentation.
Default hit region rules
A default hit region follows these rules:
- When
SetRootTransformis called, T receives a maximal hit region, covering the entire view. - If [
SetHitRegions] is called on T, either before or afterSetRootTransform, then no default hit region is active and the client specified hit regions are used. - If a transform is no longer the root transform, i.e.,
SetRootTransformis called, then the original transform no longer has its default hit region. - Clients can remove or modify the root transform’s hit regions the same way they would
reset any other transform’s hit regions, by calling [
SetHitRegions] with the appropriate vector.
SetHitRegions
Sets the interactive areas for a Transform. By default, Content is not interactive; hit regions must be placed for a user to interact with the Content in a View. Because hit regions are described in the Flatland protocol, a Flatland instance can synchronize Content and hit regions.
Each hit region is placed in the coordinate space of the owning Transform, and may or may
not interact with different types of hit testing, depending on its HitTestInteraction
type. When there are multiple hit regions that intersect with a hit test, the precedence
rules given below dictate which hit region has interacted with the hit test. Only Transforms
that transitively connect to the root Transform have their hit regions interact with a hit
test.
Calling this function replaces any previous values set on this Transform. To reset a
Transform to “no hit testing”: send an empty vector with [SetHitRegions].
Note that root transforms get a default hit region installed by Flatland. For more details,
see the [SetRootTransform] documentation.
Precedence rules
Within a Transform, if multiple hit regions overlap, the hit test examines each
intersecting hit region for a possible interaction. Thus, for a regular hit test R and an
accessibility hit test A, where R and A both intersect two hit regions D ([DEFAULT]) and
S ([SEMANTICALLY_INVISIBLE]) on the same Transform, (1) R interacts with both D and S,
and (2) A only interacts with D. Generally, hit regions that overlap in a single Transform
can cause confusing behavior.
Within a View, for a given hit test, the front-most Transform’s hit regions take
precedence over those behind. This follows the expected reverse “render order” of
Transforms (described in [CreateTransform]), where a user expects to interact with
Content that is visible, or front-most.
Across Flatland instances, for a given hit test, the front-most instance’s front-most Transform’s hit regions take precedence over those behind. This follows the expected reverse “render order” of views, where a user expects to interact with the View that is visible, or front-most. For example, if a child View owns Content that is rendered over the parent View, the user expects to interact with the child’s Content.
SetInfiniteHitRegion
Identical to [SetHitRegions], except the hit region associated with [transform_id]
covers an infinite region. The hit region is invariant against translation, scaling, and
orientation of the Transform.
An infinite hit region is still limited in extent by the View’s clip boundary, just like a finite hit region.
Calling this function replaces any previous values set on this Transform. To reset a
Transform to “no hit testing”: send an empty vector with [SetHitRegions].
CreateViewport
The Viewport and View pair, together, represent the connection between two Flatland instances. The Viewport is created in the parent, and the View is created in the child. The parent has control over how the child’s View is integrated into its own View.
Any illegal operations on ChildViewWatcher will cause both ChildViewWatcher channel and this Flatland channel to be torn down.
ViewportProperties must have logical_size set. This is the initial size that will drive
the layout of the child. The logical_size is also used as the default Content size, but
subsequent changes to the logical_size will have no effect on the Content size.
ViewportProperties may have inset field not set. In that case, the default value of
(0, 0, 0, 0) is used.
The logical_size must have positive X and Y components.
Zero is not a valid ContentId. All other values are valid, assuming they are not already
in use for another piece of Content (see [ReleaseViewport] for more details).
Lifecycle note. The lifetime of the ChildViewWatcher channel is bound by the peer ViewCreationToken. When the ViewCreationToken dies, this ChildViewWatcher channel is destroyed.
Fields
token: ViewportCreationTokenproperties: ViewportPropertieschild_view_watcher: ServerEnd<ChildViewWatcherMarker>control_handle: FlatlandControlHandleCreateImage
An Image is a bitmap backed by a specific VMO in a BufferCollection.
Image creation requires an allocated BufferCollection registered with Allocator. This function will fail unless all clients of the specified BufferCollection have set their constraints.
The Image must reference a valid VMO index and must have ImageProperties that fall within the constraints specified by the backing BufferCollection (i.e. width and height within a valid range, etc.)
Zero is not a valid Image id. All other values are valid, assuming they are not already in
use for another piece of Content (see [ReleaseImage] for more details).
Fields
import_token: BufferCollectionImportTokenproperties: ImagePropertiescontrol_handle: FlatlandControlHandleSetImageSampleRegion
This function is used to determine the region (in texel space) of an image that will be used
by Flatland when rendering. The image to be sampled is referenced by [image_id] and the
sample region is specified by [rect] which itself is comprised of an origin point (x,y) as
well as a width and height, in unnormalized coordinates. It is illegal to call this function
on non-image content, or to sample a region outside of the texel space of the image. In
other words, the region specifed by [rect] must not exceed the ranges (0, image_width) and
(0, image_height). If (rect.x + rect.width > image_width) or (rect.y + rect.height >
image_height) or if any of the values are negative, this will result in an error.
If this method is not called, the default sample region is the rectangle with origin at
(0, 0) and width and height set at ImageProperties from [CreateImage].
SetImageDestinationSize
The content size for an Image is the size of the rectangle in the parent’s logical coordinate space that the image occupies. This combined with the global translation of the transform it is attached to determines the size and location of where the content is rendered on the display.
If this method is not called, the default image destination size is the width and height set
at ImageProperties from [CreateImage]. The destination size will be affected by scaling if
[SetScale] is used on the attached Transform or its parents.
SetImageBlendingFunction
Determines the blend function to use when rendering the content specified by |image_id|. |image_id| must be a valid ContentId associated to a transform through a call to |CreateImage| or |CreateFilledRect|. For details on the different blend functions that are available, please refer to the BlendMode enum. If this function is not called, then the default blendmode is BlendMode::SRC.
SetImageOpacity
Sets an opacity in linear space to be applied to a flatland image. Opacity values must be in the range [0.0, 1.0].
SetImageFlip
Sets the image flip to be applied to a flatland image. This call must be performed after a successful |CreateImage| call. If an invalid |image_id| is supplied, the channel will be closed due to FlatlandError::BAD_OPERATION. This flip will be applied to the Image before parent Transform Orientations. If this function is not called, then the default flip value is ImageFlip::NONE.
CreateFilledRect
Creates a solid-color rectangle. By default a filled-rect does not have a defined color or size. It is necessary to call |SetSolidFill| to specify a color and size before a filled rect can be used for rendering. Not doing so will result the
SetSolidFill
Defines the color and size of a filled rect. |rect_id| must refer to content that was created via a call to CreateFilledRect. The color is not premultiplied. Color values must be within the range [0,1] inclusive, and normal 32-bit floating point values: https://en.wikipedia.org/wiki/Normal_number_%28computing%29. Values that do not conform to these specifications will cause the channel to close. The rectangle’s top left corner will be at (0, 0) in its transform’s coordinate space. Hence, its bottom right corner will be at (size.width, size.height).
ReleaseFilledRect
Automatically garbage collects the rectangle when it is no longer needed for rendering. |rect_id| must have been instantiated with a call to |CreateFilledRect|. Once released, the ID immediately goes out of scope and is free to be used again.
SetContent
Setting a piece of Content on a Transform makes that Content visible in the render tree as long as the Transform is visible from the root Transform. The Content will be rendered before, and therefore “behind”, any Content attached to the descendants of the Transform.
Because each Transform can have, at most, a single piece of Content on it, calling this function on a Transform that already has Content will replace that Content.
A Content may be set on more than one Transform.
Calling this function with a Content id of 0 will remove any Content currently on the Transform.
SetViewportProperties
Transforms are usually sufficient to change how Content is presented. Viewports, however, have special properties that are not part of the Transform hierarchy. Those properties can be set using this function.
ReleaseTransform
Released Transforms will be garbage collected by the system once they are no longer necessary for rendering. For Transforms, this means there is no path from any unreleased Transform to the newly-released Transform.
Once released, the id immediately goes out of scope for future function calls and can be reused when creating new Transforms.
It is an error to call functions with a released id (unless that id has been reused to construct a new Transform).
ReleaseView
Fields
control_handle: FlatlandControlHandleReleaseViewport
Releases a Viewport from the scene, even if the Viewport is still connected to a Transform.
Unlike other resources, Viewports are garbage collected by the system during the next
[Present] because a removed Viewport is guaranteed to provide no renderable content.
Use SetContent(transform_id, 0) to clean up references to released Viewports.
Despite having a return type, this function is still feed-forward like [CreateView] and
requires a call to [Present] to be executed. The ViewportCreationToken will be returned
after the presented operations have been executed.
ReleaseImage
Released Images will be garbage collected by the system once they are no longer necessary for rendering. For Images, this means the Image is no longer attached to any Transform and any pending rendering that references the Image is complete.
Use SetContent(transform_id, 0) to clean up references to released Images.
Once released, the id immediately goes out of scope for future function calls and can be reused when creating new Images.
It is an error to call functions with a released id (unless that id has been reused to construct a new Image).
Clear
This function will reset all state on this interface. This includes destroying all existing View and Viewports without returning the associated Token to the caller.
Fields
control_handle: FlatlandControlHandleSetDebugName
Set debug name of the current client that can be used by Flatland to print as a prefix to
logs to help client distinguish what is theirs. [name] can be an arbitrary string, but the
current process name (see fsl::GetCurrentProcessName()) is a good default.
Implementations§
source§impl FlatlandRequest
impl FlatlandRequest
pub fn into_present(self) -> Option<(PresentArgs, FlatlandControlHandle)>
pub fn into_create_view( self ) -> Option<(ViewCreationToken, ServerEnd<ParentViewportWatcherMarker>, FlatlandControlHandle)>
pub fn into_create_view2( self ) -> Option<(ViewCreationToken, ViewIdentityOnCreation, ViewBoundProtocols, ServerEnd<ParentViewportWatcherMarker>, FlatlandControlHandle)>
pub fn into_create_transform( self ) -> Option<(TransformId, FlatlandControlHandle)>
pub fn into_set_translation( self ) -> Option<(TransformId, Vec_, FlatlandControlHandle)>
pub fn into_set_orientation( self ) -> Option<(TransformId, Orientation, FlatlandControlHandle)>
pub fn into_set_scale( self ) -> Option<(TransformId, VecF, FlatlandControlHandle)>
pub fn into_set_opacity( self ) -> Option<(TransformId, f32, FlatlandControlHandle)>
pub fn into_set_clip_boundary( self ) -> Option<(TransformId, Option<Box<Rect>>, FlatlandControlHandle)>
pub fn into_add_child( self ) -> Option<(TransformId, TransformId, FlatlandControlHandle)>
pub fn into_remove_child( self ) -> Option<(TransformId, TransformId, FlatlandControlHandle)>
pub fn into_set_root_transform( self ) -> Option<(TransformId, FlatlandControlHandle)>
pub fn into_set_hit_regions( self ) -> Option<(TransformId, Vec<HitRegion>, FlatlandControlHandle)>
pub fn into_set_infinite_hit_region( self ) -> Option<(TransformId, HitTestInteraction, FlatlandControlHandle)>
pub fn into_create_viewport( self ) -> Option<(ContentId, ViewportCreationToken, ViewportProperties, ServerEnd<ChildViewWatcherMarker>, FlatlandControlHandle)>
pub fn into_create_image( self ) -> Option<(ContentId, BufferCollectionImportToken, u32, ImageProperties, FlatlandControlHandle)>
pub fn into_set_image_sample_region( self ) -> Option<(ContentId, RectF, FlatlandControlHandle)>
pub fn into_set_image_destination_size( self ) -> Option<(ContentId, SizeU, FlatlandControlHandle)>
pub fn into_set_image_blending_function( self ) -> Option<(ContentId, BlendMode, FlatlandControlHandle)>
pub fn into_set_image_opacity( self ) -> Option<(ContentId, f32, FlatlandControlHandle)>
pub fn into_set_image_flip( self ) -> Option<(ContentId, ImageFlip, FlatlandControlHandle)>
pub fn into_create_filled_rect( self ) -> Option<(ContentId, FlatlandControlHandle)>
pub fn into_set_solid_fill( self ) -> Option<(ContentId, ColorRgba, SizeU, FlatlandControlHandle)>
pub fn into_release_filled_rect( self ) -> Option<(ContentId, FlatlandControlHandle)>
pub fn into_set_content( self ) -> Option<(TransformId, ContentId, FlatlandControlHandle)>
pub fn into_set_viewport_properties( self ) -> Option<(ContentId, ViewportProperties, FlatlandControlHandle)>
pub fn into_release_transform( self ) -> Option<(TransformId, FlatlandControlHandle)>
pub fn into_release_view(self) -> Option<FlatlandControlHandle>
pub fn into_release_viewport( self ) -> Option<(ContentId, FlatlandReleaseViewportResponder)>
pub fn into_release_image(self) -> Option<(ContentId, FlatlandControlHandle)>
pub fn into_clear(self) -> Option<FlatlandControlHandle>
pub fn into_set_debug_name(self) -> Option<(String, FlatlandControlHandle)>
sourcepub fn method_name(&self) -> &'static str
pub fn method_name(&self) -> &'static str
Name of the method defined in FIDL