32 lines
2.2 KiB
JavaScript
32 lines
2.2 KiB
JavaScript
import { ALPHA_MODES } from "@pixi/constants";
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let promise;
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async function detectVideoAlphaMode() {
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return promise ?? (promise = (async () => {
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const gl = document.createElement("canvas").getContext("webgl");
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if (!gl)
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return ALPHA_MODES.UNPACK;
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const video = await new Promise((resolve) => {
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const video2 = document.createElement("video");
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video2.onloadeddata = () => resolve(video2), video2.onerror = () => resolve(null), video2.autoplay = !1, video2.crossOrigin = "anonymous", video2.preload = "auto", video2.src = "data:video/webm;base64,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", video2.load();
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});
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if (!video)
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return ALPHA_MODES.UNPACK;
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const texture = gl.createTexture();
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gl.bindTexture(gl.TEXTURE_2D, texture);
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const framebuffer = gl.createFramebuffer();
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gl.bindFramebuffer(gl.FRAMEBUFFER, framebuffer), gl.framebufferTexture2D(
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gl.FRAMEBUFFER,
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gl.COLOR_ATTACHMENT0,
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gl.TEXTURE_2D,
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texture,
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0
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), gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, !1), gl.pixelStorei(gl.UNPACK_COLORSPACE_CONVERSION_WEBGL, gl.NONE), gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, video);
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const pixel = new Uint8Array(4);
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return gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, pixel), gl.deleteFramebuffer(framebuffer), gl.deleteTexture(texture), gl.getExtension("WEBGL_lose_context")?.loseContext(), pixel[0] <= pixel[3] ? ALPHA_MODES.PMA : ALPHA_MODES.UNPACK;
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})()), promise;
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}
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export {
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detectVideoAlphaMode
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};
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//# sourceMappingURL=detectVideoAlphaMode.mjs.map
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