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602 lines
24 KiB
Clojure
602 lines
24 KiB
Clojure
;; This Source Code Form is subject to the terms of the Mozilla Public
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;; License, v. 2.0. If a copy of the MPL was not distributed with this
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;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
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;;
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;; Copyright (c) KALEIDOS SUBSIDIARY SL
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(ns benches.render-wasm.browser
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"Browser bridge for the benchmarks.
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Lifecycle here mirrors the editor cold-load path
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(`app.render-wasm.api/initialize-viewport` + `set-objects` sync).
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The browser exports `bridge`; Node passes data through `page.evaluate`.
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`loadScene` resolves to Transit. `ping` and `dispose` return plain data.
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Failures are returned as `{\"status\" \"failed\" ...}` maps."
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(:require
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[app.common.render-wasm.helpers :as h]
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[app.common.render-wasm.serialize-shape :as serialize-shape]
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[app.common.render-wasm.serializers :as sr]
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[app.common.render-wasm.wasm :as wasm]
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[app.common.schema :as sm]
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[app.common.transit :as t]
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;; bind the enum table from the prepared renderer build's `shared.js` so
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;; a missing `shared.js` fails the compile. A stale or mismatched one throws
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;; at load
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[app.render-wasm.api.enums]
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[app.render-wasm.api.webgl :as webgl]
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[benches.render-wasm.cases]
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[benches.render-wasm.failures :as fail]
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[benches.render-wasm.protocol :as protocol]
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[benches.render-wasm.scenes.common :as scenes]
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[benches.render-wasm.scenes.core :as core]
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[benches.render-wasm.upload :as upload]))
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;; Forward decls
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(declare now guard-current! read-graphics)
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(def schema:load-scene-args
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"Decoded Transit request for `load-scene`."
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[:map {:closed true}
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[:seed [:int {:min 0 :max 4294967295}]] ;; derived in `collect-cases`
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[:case map?]
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[:module-url {:optional true} string?]
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[:wasm-url {:optional true} string?]])
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(def ^:const ^:private attempt-ms-budget
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"Own wall deadline for one bridge attempt, checked by `browser-hooks`.
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Ticket 11 accepts a per-attempt timeout; until then this fixed value
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bounds runaway drains. The Node outer timeout stays the backstop for
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synchronously blocked pages."
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30000)
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(def ^:const ^:private gesture-settle-ms
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"Declared settle wait for warm gestures. The actual wait is recorded
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separately by `protocol/interact`."
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100)
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(defn- browser-hooks
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"Browser hooks for one owner epoch and deadline."
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[epoch deadline-ms]
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{:now now
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;; rAF scheduling
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:frame #(js/Promise.
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(fn [resolve] (.requestAnimationFrame js/window resolve)))
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:sleep #(js/Promise. (fn [resolve] (js/setTimeout resolve %)))
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;; checks that this attempt still owns the page, WebGL context hasn't been
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;; lost, and the deadline hasn't passed
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:check (fn []
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(when @wasm/context-lost?
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(throw (ex-info "WebGL context lost"
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{:phase "context-lost"})))
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(guard-current! epoch "protocol")
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(when (> (now) deadline-ms)
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(throw (ex-info "attempt deadline exceeded"
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{:phase "deadline"}))))
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;; WASM calls
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:render (fn [timestamp flags]
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(h/call wasm/internal-module "_render" timestamp flags))
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:render-from-cache #(h/call wasm/internal-module "_render_from_cache" 0)
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:set-view #(h/call wasm/internal-module "_set_view"
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(:scale %) (- (:x %)) (- (:y %)))
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:set-view-start #(h/call wasm/internal-module "_set_view_start")
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:set-view-end #(h/call wasm/internal-module "_set_view_end")})
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;; TODO(tickets 07/08): Move gestures into scene cases. These rectangle ID
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;; checks reject every new warm case; the bridge should run its gesture.
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(defn- linear-frames
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"Linear interpolation of `{:scale :x :y}` views from `from` to `to` over
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`n` frames."
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[from to n]
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(mapv (fn [i]
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(let [t (/ (inc i) n)]
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{:scale (+ (:scale from) (* t (- (:scale to) (:scale from))))
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:x (+ (:x from) (* t (- (:x to) (:x from))))
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:y (+ (:y from) (* t (- (:y to) (:y from))))}))
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(range n)))
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(defn- gesture-frames
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"Builds rectangle pan or zoom frames from the case view. Other case ids
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throw because the bridge has no gesture for them."
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[case view]
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(cond
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(= (:id case) :rects/pan)
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(linear-frames view (update view :x + 200) 20)
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(= (:id case) :rects/zoom)
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(linear-frames view (update view :scale * 1.5) 20)
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:else
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(throw (ex-info (str "no gesture declared for case " (:id case))
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{:phase "gesture"
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:case (:id case)}))))
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;; Monotonic owner generation. Every async continuation compares its
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;; captured epoch and drops stale results silently; dispose/load bump it.
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(defonce ^:private owner-epoch*
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(atom 0))
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;; Cached Emscripten import. Import precedes module-init timing (untimed).
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(defonce ^:private module-promise*
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(atom nil))
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;; Page-scoped canvas owned by the current load. Fresh page per attempt in
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;; the future runner; the pilot loads once.
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(defonce ^:private canvas*
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(atom nil))
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(defn- mark-live!
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[]
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(reset! wasm/context-lost? false)
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(set! wasm/context-initialized? true))
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(defn- now
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[]
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(.now js/performance))
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(defn- ensure-module!
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"Imports the Emscripten glue (cached per page, untimed: script import
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precedes module-init timing) and instantiates it with `locateFile`
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pointing at the prepared `.wasm` bytes. Resolves
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`{:module instance :factory-ms ms}` where factory-ms covers the
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instantiate call only."
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[module-url wasm-url]
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(when (nil? @module-promise*)
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(reset! module-promise*
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(-> (js/dynamicImport module-url)
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(.then (fn [module]
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(let [t0 (now)
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default-fn (unchecked-get module "default")]
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(-> (default-fn #js {:locateFile (constantly wasm-url)})
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(.then (fn [instance]
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{:module instance
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:factory-ms (- (now) t0)})))))))))
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@module-promise*)
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(defn- renderer-string
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"Reads the unmasked renderer (SwiftShader/llvmpipe detection for the
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software-renderer warning). The init helper forces the debug extension."
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[context]
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(try
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(let [ext (.getExtension ^js context "WEBGL_debug_renderer_info")]
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(if (some? ext)
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(str (.getParameter ^js context (unchecked-get ext "UNMASKED_RENDERER_WEBGL")))
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"unknown"))
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(catch :default _ "unknown")))
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(defn- software-renderer?
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[s]
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(boolean (re-find #"(?i)swiftshader|llvmpipe|software|basic render" (or s ""))))
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(defn- teardown-canvas!
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"Releases the context after successful initialization, then removes its
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canvas. The initializer owns cleanup until it returns a context."
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[canvas]
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(when (some? canvas)
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(when-let [context wasm/gl-context]
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(webgl/release-context! wasm/internal-module context wasm/gl-context-handle))
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(try
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(.remove ^js canvas)
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(catch :default _))))
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(defn- release-owner-resources!
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"Drops the current owner's canvas, GL handles and WASM module binding
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without touching the owner epoch. Callers own the epoch: `dispose!` bumps
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first, superseding loads already bumped for the new owner."
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[]
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(teardown-canvas! @canvas*)
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(wasm/reset-context-state!)
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;; reset-context-state! deliberately preserves loss state for the editor
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;; reload path; bench disposal owns it explicitly.
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(reset! wasm/context-lost? false)
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(set! wasm/internal-module nil)
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(reset! canvas* nil))
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(defn dispose!
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"Closes the current owner: bumps the epoch (running continuations go
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stale), releases renderer resources and drops the cached module promise so
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a later load re-imports cleanly. Idempotent. Stale callers must not clean
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up a newer owner; use `dispose-if-current!` from async continuations."
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[]
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(swap! owner-epoch* inc)
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(release-owner-resources!)
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(reset! module-promise* nil)
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#js {"status" "disposed"})
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(defn- dispose-if-current!
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"Disposes only when `epoch` is still current. Stale work returns false
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without modifying the newer owner's canvas, GL context or module cache."
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[epoch]
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(when (= epoch @owner-epoch*)
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(dispose!)
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true))
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(defn- render-ok
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"Maps one drain result to the bridge value.
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Success keeps the owner live for explicit disposal. Failures release the owner
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only if it still is current (i.e. it owns the page resources) to avoid
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disposing of resources belonging to a newer owner in case of a stale failure."
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[epoch module-ms graphics-ms upload-ms alive? drain-result snapshot seed ctx width height dpr renderer]
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(if-not alive?
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(do
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(dispose-if-current! epoch)
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(fail/fail-data {:phase "first-render"
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:message "disposed or context lost during render"}))
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(assoc drain-result
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:status "ok"
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:module-init-ms module-ms
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:graphics-init-ms graphics-ms
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:upload-ms upload-ms
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:first-render-ms (:full-ms drain-result)
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:render-frames (count (:slices drain-result))
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:scene {:shapes (count (:objects snapshot))
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:seed seed}
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:effective-graphics (read-graphics ctx width height dpr renderer))))
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(defn- read-graphics
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"Records effective graphics settings: requested CSS size and DPR
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separately from the observed drawing-buffer size and the context's actual
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attributes. Requested defaults live in `webgl/default-context-options`;
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the drawing-buffer size is the context's actual `drawingBufferWidth/Height`,
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not the canvas attributes. What the browser granted comes from
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`getContextAttributes`."
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[ctx width height dpr renderer]
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(let [attrs (try
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(.getContextAttributes ^js ctx)
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(catch :default _ nil))
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attr (fn [k]
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(when (some? attrs)
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(unchecked-get attrs k)))]
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{:css-width width
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:css-height height
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:drawing-buffer-width (.-drawingBufferWidth ^js ctx)
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:drawing-buffer-height (.-drawingBufferHeight ^js ctx)
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:dpr dpr
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:webgl2 true
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:antialias (attr "antialias")
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:depth (attr "depth")
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:stencil (attr "stencil")
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:alpha (attr "alpha")
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:preserve-drawing-buffer (attr "preserveDrawingBuffer")
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:renderer renderer
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:software (software-renderer? renderer)}))
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(defn- install-listeners!
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"Wires context lost/restored handling for `canvas`, epoch-guarded: a stale
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canvas (removed but not yet GC'd) must not kill the live owner. On loss the
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current owner releases its canvas and GL resources itself: the protocol
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loop only observes staleness afterwards, so a cleanup by `render-ok` /
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`warm-ok` there would always miss."
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[canvas epoch]
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(.addEventListener
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canvas "webglcontextlost"
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(let [installed epoch]
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(fn [e]
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(.preventDefault ^js e)
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(when (= installed @owner-epoch*)
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(release-owner-resources!)
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(reset! module-promise* nil)
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(reset! wasm/context-lost? true)
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(swap! owner-epoch* inc)))))
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(.addEventListener
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canvas "webglcontextrestored"
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(let [installed epoch]
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(fn [_]
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(when (= installed @owner-epoch*)
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(swap! owner-epoch* inc))))))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Public interface
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defn- terminal-failure
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"Maps a chain rejection to the bridge value. Stale work resolves to the
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stale marker without touching the newer owner; any other failure releases
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the owner when it still owns the realm and resolves to a failure map, so
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the bridge promise never rejects. The top message stays phase-labeled for
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accounting; the original failure lives under `:cause` as plain data. Only
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the top-level cause decides staleness."
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[epoch cause fallback-phase]
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(if (fail/stale? cause)
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{:status "stale"}
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(let [phase (try (or (:phase (ex-data cause))
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fallback-phase
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"aborted")
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(catch :default _
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(or fallback-phase "aborted")))
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message (try (or (ex-message cause) "unknown failure")
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(catch :default _
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"unknown failure"))
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detail (try (fail/describe-cause cause)
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(catch :default _
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[{:message fail/unrenderable-cause-text}]))]
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(dispose-if-current! epoch)
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(fail/fail-data {:phase phase
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:message message
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:cause detail}))))
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(defn- guard-current!
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"Throws the stale marker when `epoch` no longer owns the realm. Every
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async step calls it first with its own phase so the terminal handler can
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tell superseded work from genuine failures. The marker lives in `ex-data`,
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never in the message: message text is not a protocol."
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[epoch phase]
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(when-not (= epoch @owner-epoch*)
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(throw (ex-info "superseded" {::fail/stale true :phase phase}))))
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(defn- build-canvas!
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"Creates the bench canvas with a `width*dpr` backing buffer and an explicit
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CSS size, so the drawn scene fills exactly the reported viewport."
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[width height dpr]
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(let [canvas (.createElement js/document "canvas")]
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(aset canvas "width" (* width dpr))
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(aset canvas "height" (* height dpr))
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(aset (.-style ^js canvas) "width" (str width "px"))
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(aset (.-style ^js canvas) "height" (str height "px"))
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canvas))
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(defn- warm-ok
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"Maps an interaction to the bridge result. Success keeps the owner live;
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failure releases it if this attempt still owns the page."
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[epoch module-ms graphics-ms upload-ms interact-ms alive? interaction snapshot seed ctx width height dpr renderer]
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(if-not alive?
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(do
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(dispose-if-current! epoch)
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(fail/fail-data {:phase "interact"
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:message "disposed or context lost during interaction"}))
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(merge interaction
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{:status "ok"
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:module-init-ms module-ms
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:graphics-init-ms graphics-ms
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:upload-ms upload-ms
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:interact-ms interact-ms
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:scene {:shapes (count (:objects snapshot))
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:seed seed}
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:effective-graphics (read-graphics ctx width height dpr renderer)})))
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(defn- run-fresh
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"Times one drain for a fresh-context case. Resolves the bridge value
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through `render-ok`; drain failures resolve through `terminal-failure`."
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[epoch hooks seed dims g live?]
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(let [{:keys [module-ms graphics-ms renderer ctx snapshot upload-ms]} g
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{:keys [width height dpr]} dims]
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(-> (protocol/drain hooks {:flags 0 :origin ((:now hooks)) :immediate false})
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(.then (fn [drain-result]
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(render-ok epoch module-ms graphics-ms upload-ms
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(live?) drain-result snapshot seed
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(:context ctx) width height dpr renderer)))
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(.catch (fn [cause]
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(terminal-failure epoch cause "first-render"))))))
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(defn- run-warm
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"Restores the initial view and drains outside timing, then times one
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gesture for a reuse-context case. Resolves the bridge value through
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`warm-ok`; gesture failures resolve through `terminal-failure`."
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[epoch hooks case-desc seed dims g live?]
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(let [{:keys [module-ms graphics-ms renderer ctx snapshot upload-ms view]} g
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{:keys [width height dpr]} dims]
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(-> (protocol/restore hooks view)
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(.then (fn [_]
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(guard-current! epoch "interact")
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(let [t0 ((:now hooks))]
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(-> (protocol/interact
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hooks
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{:frames (gesture-frames case-desc view)
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:settle-ms gesture-settle-ms})
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(.then (fn [interaction]
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(warm-ok epoch module-ms graphics-ms upload-ms
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(- ((:now hooks)) t0) (live?) interaction
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snapshot seed (:context ctx)
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width height dpr renderer)))
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(.catch (fn [cause]
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(terminal-failure epoch cause "interact")))))))
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(.catch (fn [cause]
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(terminal-failure epoch cause "restore"))))))
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(defn- parse-load-request
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"Decodes and validates the request before claiming the page. Failure
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leaves the current owner untouched."
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[request]
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(try
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(let [params (t/decode-str request)]
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(if-not (sm/validate schema:load-scene-args params)
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{:error (fail/fail-data {:phase "invalid-args"
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:message "load-scene needs a Transit request with seed and case"})}
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(let [case-desc (:case params)
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scene (core/registered-scene (:scene case-desc))]
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(when (nil? scene)
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(throw (ex-info (str "unknown scene: " (:scene case-desc))
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{:phase "invalid-args"})))
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{:params params
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:case-desc (core/check-collected-case case-desc)
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:scene scene})))
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(catch :default cause
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{:error (fail/fail-data {:phase "invalid-args"
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:message (or (ex-message cause)
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"invalid Transit request")})})))
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(defn- begin-load!
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"Claims the page, releases the prior owner, then fixes this attempt's
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viewport, hooks and deadline. Module instantiation gets a fresh cache."
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[case-desc]
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(let [epoch (swap! owner-epoch* inc)]
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(release-owner-resources!)
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(reset! module-promise* nil)
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(let [viewport (core/resolve-viewport (:view case-desc))]
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{:epoch epoch
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:dims viewport
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:hooks (browser-hooks epoch (+ (now) attempt-ms-budget))
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:live? (fn [] (and (= epoch @owner-epoch*) (wasm/live?)))})))
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(defn- load-module
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"Imports and instantiates the renderer. A failed import or factory call
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keeps the module-init phase and its cause for bridge accounting."
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[epoch params]
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(-> (ensure-module! (or (:module-url params) "./render-wasm.js")
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(or (:wasm-url params) "./render-wasm.wasm"))
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(.catch (fn [cause]
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(throw (ex-info (str "module init failed: "
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(or (ex-message cause) cause))
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{:phase "module-init"}
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cause))))
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(.then (fn [installed]
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(guard-current! epoch "module-init")
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installed))))
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(defn- initialize-graphics!
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"Creates the canvas and WebGL context, binds them to the renderer and
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returns the module and graphics timings for later phases."
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[epoch {:keys [width height dpr]} {:keys [module factory-ms]}]
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(guard-current! epoch "graphics-init")
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(set! wasm/internal-module module)
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(let [canvas (build-canvas! width height dpr)]
|
|
(.appendChild (.-body js/document) canvas)
|
|
(reset! canvas* canvas)
|
|
(let [g0 (now)
|
|
ctx (try
|
|
(webgl/init-context
|
|
canvas
|
|
{:module module
|
|
:context-id "webgl2"
|
|
:css-width width
|
|
:css-height height
|
|
:dpr dpr
|
|
:flags 0
|
|
:browser (sr/translate-browser :chrome)
|
|
:params {}})
|
|
(catch :default cause
|
|
(throw (ex-info "graphics init failed"
|
|
{:phase "graphics-init"}
|
|
cause))))]
|
|
(when (nil? ctx)
|
|
(throw (ex-info "WebGL2 context unavailable"
|
|
{:phase "graphics-init"})))
|
|
(set! wasm/gl-context-handle (:handle ctx))
|
|
(set! wasm/gl-context (:context ctx))
|
|
(set! wasm/canvas canvas)
|
|
(mark-live!)
|
|
(try
|
|
(h/call wasm/internal-module "_resize_viewbox" width height)
|
|
(catch :default cause
|
|
(throw (ex-info "resize viewbox failed"
|
|
{:phase "graphics-init"}
|
|
cause))))
|
|
(install-listeners! canvas epoch)
|
|
{:module-ms factory-ms
|
|
:graphics-ms (- (now) g0)
|
|
:renderer (renderer-string (:context ctx))
|
|
:ctx ctx})))
|
|
|
|
(defn- prepare-scene
|
|
"Builds and validates the registered scene, then orders its shapes before
|
|
the upload timer begins."
|
|
[epoch scene case-desc seed graphics]
|
|
(guard-current! epoch "scene-build")
|
|
(try
|
|
(let [snapshot (-> ((:build scene) (assoc (:params case-desc) :seed seed))
|
|
(scenes/validate!))]
|
|
(assoc graphics
|
|
:snapshot snapshot
|
|
:ordered (upload/prepare-scene snapshot)))
|
|
(catch :default cause
|
|
(if (fail/stale? cause)
|
|
(throw cause)
|
|
(throw (ex-info "scene build failed"
|
|
{:phase "scene-build"}
|
|
cause))))))
|
|
|
|
(defn- upload-scene!
|
|
"Sets the initial view and uploads prepared shapes inside the upload
|
|
timer. Ends the loading lifecycle even when serialization fails."
|
|
[epoch case-desc graphics]
|
|
(guard-current! epoch "upload")
|
|
(try
|
|
(let [u0 (now)
|
|
view (:view case-desc)]
|
|
(h/call wasm/internal-module "_set_view"
|
|
(:scale view) (- (:x view)) (- (:y view)))
|
|
(h/call wasm/internal-module "_init_shapes_pool"
|
|
(count (:objects (:snapshot graphics))))
|
|
(h/call wasm/internal-module "_begin_loading")
|
|
(try
|
|
;; Rects carry no layout; per-scene upload options arrive with 07/08.
|
|
(serialize-shape/serialize-shapes-batch
|
|
(:ordered graphics)
|
|
{:include-layout? false
|
|
:include-fills-strokes? true})
|
|
(finally
|
|
(h/call wasm/internal-module "_end_loading")))
|
|
(h/call wasm/internal-module "_set_view_end")
|
|
(assoc graphics :upload-ms (- (now) u0) :view view))
|
|
(catch :default cause
|
|
(if (fail/stale? cause)
|
|
(throw cause)
|
|
(throw (ex-info "upload failed"
|
|
{:phase "upload"}
|
|
cause))))))
|
|
|
|
;; TODO(ticket 14): Run the declared case body here. Context dispatch skips
|
|
;; `:run!`, so custom cases cannot execute through this bridge.
|
|
(defn- render-scene
|
|
"Runs the fresh or reuse completion path after upload."
|
|
[{:keys [epoch dims hooks live?]} case-desc seed graphics]
|
|
(guard-current! epoch "render")
|
|
(if (= (:context case-desc) :fresh)
|
|
(run-fresh epoch hooks seed dims graphics live?)
|
|
(run-warm epoch hooks case-desc seed dims graphics live?)))
|
|
|
|
(defn load-scene
|
|
"Loads one collected case to Full. Takes a Transit request with `:seed`,
|
|
`:case` and optional module/WASM URLs; resolves to a Transit result.
|
|
Validation precedes ownership and all timers. Fresh cases time upload
|
|
and one drain; reuse cases restore and drain outside interaction timing."
|
|
[request]
|
|
(let [epoch* (volatile! nil)
|
|
result (try
|
|
(let [{:keys [error params case-desc scene]}
|
|
(parse-load-request request)
|
|
seed (:seed params)]
|
|
(if error
|
|
(js/Promise.resolve error)
|
|
(let [{:keys [epoch dims] :as attempt} (begin-load! case-desc)]
|
|
(vreset! epoch* epoch)
|
|
(-> (load-module epoch params)
|
|
(.then (fn [module]
|
|
(initialize-graphics! epoch dims module)))
|
|
(.then (fn [graphics]
|
|
(prepare-scene epoch scene case-desc seed graphics)))
|
|
(.then (fn [graphics]
|
|
(upload-scene! epoch case-desc graphics)))
|
|
(.then (fn [graphics]
|
|
(render-scene attempt case-desc seed graphics)))
|
|
(.catch (fn [cause]
|
|
(terminal-failure epoch cause "aborted")))))))
|
|
(catch :default cause
|
|
(js/Promise.resolve
|
|
(fail/fail-data {:phase "setup" :message (ex-message cause)}))))]
|
|
(-> result
|
|
(.then t/encode-str)
|
|
(.catch (fn [cause]
|
|
(when-some [epoch @epoch*]
|
|
(dispose-if-current! epoch))
|
|
(t/encode-str
|
|
(fail/fail-data {:phase "bridge"
|
|
:message (or (ex-message cause)
|
|
"result encoding failed")})))))))
|
|
|
|
(defn ping
|
|
"Bridge placeholder that checks the Node/browser boundary."
|
|
[]
|
|
#js {"status" "ok"})
|
|
|
|
(def bridge
|
|
"Browser-side bridge exported from the compiled module."
|
|
#js {"ping" ping
|
|
"loadScene" load-scene
|
|
"dispose" dispose!})
|