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fix: render shader transitions for SDR compositions (#640)

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* feat: cache shader transition preview frames

* fix: move shader transition loading to player

* fix: render shader transitions for sdr compositions
This commit is contained in:
Vance Ingalls
2026-05-06 01:29:44 -07:00
committed by GitHub
parent a7b308b667
commit b0fb664873
4 changed files with 134 additions and 50 deletions
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packages/engine/src/utils/alphaBlit.test.ts
+10
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@@ -511,6 +511,16 @@ describe("blitRgba8OverRgb48le", () => {
expect(canvas.readUInt16LE(4)).toBe(0);
});
it("fully opaque DOM with srgb transfer expands 8-bit channels to 16-bit SDR", () => {
const canvas = makeHdrFrame(1, 1, 10000, 20000, 30000);
const dom = makeDomRgba(1, 1, 255, 128, 1, 255);
blitRgba8OverRgb48le(dom, canvas, 1, 1, "srgb");
expect(canvas.readUInt16LE(0)).toBe(65535);
expect(canvas.readUInt16LE(2)).toBe(128 * 257);
expect(canvas.readUInt16LE(4)).toBe(257);
});
it("sRGB→HLG: black stays black, white stays white", () => {
const canvasBlack = makeHdrFrame(1, 1, 0, 0, 0);
const domBlack = makeDomRgba(1, 1, 0, 0, 0, 255);