package brr

  1. Overview
  2. Docs
package brr
Legend:
Library
Module
Module type
Parameter
Class
Class type

Canvas element.

type t

The type for HTMLCanvasElement objects.

val create : ?d:Brr.Document.t -> ?at:Brr.At.t list -> ?w:int -> ?h:int -> Brr.El.t list -> t

create ~w ~h [] is a canvas element with a render buffer of wxh pixels (they default to 0).

val of_el : Brr.El.t -> t

of_el e is a canvas from element e. This throws a JavaScript error if e is not a canvas element.

val to_el : t -> Brr.El.t

to_el c is c as an an element.

Render buffer dimensions

val w : t -> int

w c is the render buffer width of c in pixels.

val h : t -> int

h c is the render buffer height of c in pixels.

val set_w : t -> int -> unit

set_w c w sets the render buffer width of c to w pixels.

val set_h : t -> int -> unit

set_h c h sets the render buffer height of c to h pixels.

val set_size_to_layout_size : ?hidpi:bool -> t -> unit

set_size_to_layout_size t sets the render buffer size to the canvas' element Brr.El.inner_w Brr.El.inner_h and values. If hidpi is true (defaults), these values are multiplied by Brr.Window.device_pixel_ratio.

Contexts

Context are obtained by the modules that handle them.

Converting

type image_encode

The type for image encode parameters.

val image_encode : ?type':Jstr.t -> ?quality:float -> unit -> image_encode

image_encode ~type' ~quality () are image encoding parameters type' is the mime type of the image, it defaults to "image/png". quality a number from 0. to 1. if it makes sense for the data format (e.g. JPEG), default is implementation dependent.

val to_data_url : ?encode:image_encode -> t -> (Jstr.t, Jv.Error.t) result

to_data_url ~encode t is the canvas's image as a data url.

val to_blob : ?encode:image_encode -> t -> Brr.Blob.t option Fut.or_error

to_blob ~encode t is the canvas's image a blob object. None is returned either if the canvas has no pixels or if an error occurs during image serialisation.

val capture_stream : hz:int option -> t -> Brr_io.Media.Stream.t

capture_stream ~hz is a capture media stream for the canvas at the frequency of hz or manually if unspecified.

OCaml

Innovation. Community. Security.

GitHub Discord Twitter Peertube RSS
About
Changelog Releases Industrial Users Academic Users Why OCaml
Ecosystem
Packages Community Events OCaml Planet Jobs
Resources
Install OCaml Get Started Platform Tools Language Manual Standard Library API Books Exercises Papers OCaml Playground Logo
Policies
Carbon Footprint Governance Privacy Code of Conduct