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🎉 Support for debugging cache texture

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This commit is contained in:
Alejandro Alonso 2026-04-09 16:22:15 +02:00
parent 434e27bbe8
commit 5eebc17ce2
2 changed files with 53 additions and 0 deletions
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40
frontend/src/debug.cljs
View File

@ -31,6 +31,9 @@
[app.main.errors :as errors]
[app.main.repo :as rp]
[app.main.store :as st]
[app.render-wasm.helpers :as wasm.h]
[app.render-wasm.mem :as wasm.mem]
[app.render-wasm.wasm :as wasm]
[app.util.debug :as dbg]
[app.util.dom :as dom]
[app.util.http :as http]
@ -117,6 +120,43 @@
(js/console.log str (json/->js val))
val))
(defn- wasm-read-len-prefixed-utf8
"Reads a `[u32 byte_len][utf8 bytes...]` buffer returned by WASM and frees it.
Returns a JS string (possibly empty)."
[ptr]
(when (and ptr (not (zero? ptr)))
(let [heap-u8 (wasm.mem/get-heap-u8)
heap-u32 (wasm.mem/get-heap-u32)
len (aget heap-u32 (wasm.mem/->offset-32 ptr))
start (+ ptr 4)
end (+ start len)
decoder (js/TextDecoder. "utf-8")
text (.decode decoder (.subarray heap-u8 start end))]
(wasm.mem/free)
text)))
(defn ^:export wasmCacheConsole
"Logs the current render-wasm cache surface as an image in the JS console."
[]
(let [module wasm/internal-module
f (when module (unchecked-get module "_debug_cache_console"))]
(if (fn? f)
(wasm.h/call module "_debug_cache_console")
(js/console.warn "[debug] render-wasm module not ready or missing _debug_cache_console"))))
(defn ^:export wasmCacheBase64
"Returns the cache surface PNG base64 (empty string if missing/empty)."
[]
(let [module wasm/internal-module
f (when module (unchecked-get module "_debug_cache_base64"))]
(if (fn? f)
(let [ptr (wasm.h/call module "_debug_cache_base64")
s (or (wasm-read-len-prefixed-utf8 ptr) "")]
s)
(do
(js/console.warn "[debug] render-wasm module not ready or missing _debug_cache_base64")
""))))
(when (exists? js/window)
(set! (.-dbg ^js js/window) json/->js)
(set! (.-pp ^js js/window) pprint))

13
render-wasm/src/render/debug.rs
View File

@ -1,4 +1,7 @@
use super::{tiles, RenderState, SurfaceId};
use crate::with_state_mut;
use crate::STATE;
use macros::wasm_error;
use skia_safe::{self as skia, Rect};
#[cfg(target_arch = "wasm32")]
@ -210,3 +213,13 @@ pub fn console_debug_surface_rect(render_state: &mut RenderState, id: SurfaceId,
run_script!(format!("console.log('%c ', 'font-size: 1px; background: url(data:image/png;base64,{base64_image}) no-repeat; padding: 100px; background-size: contain;')"))
}
}
#[no_mangle]
#[wasm_error]
#[cfg(target_arch = "wasm32")]
pub extern "C" fn debug_cache_console() -> Result<()> {
with_state_mut!(state, {
console_debug_surface(state.render_state_mut(), SurfaceId::Cache);
});
Ok(())
}