67 lines
2.8 KiB
JavaScript
67 lines
2.8 KiB
JavaScript
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function TranscoderWorkerWrapper() {
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let basisBinding;
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const messageHandlers = {
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init: (message) => self.BASIS ? (self.BASIS({ wasmBinary: message.wasmSource }).then((basisLibrary) => {
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basisLibrary.initializeBasis(), basisBinding = basisLibrary, self.postMessage({
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type: "init",
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success: !0
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});
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}), null) : (console.warn("jsSource was not prepended?"), {
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type: "init",
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success: !1
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}),
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transcode(message) {
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const basisData = message.basisData, BASIS = basisBinding, data = basisData, basisFile = new BASIS.BasisFile(data), imageCount = basisFile.getNumImages(), basisFormat = basisFile.getHasAlpha() ? message.rgbaFormat : message.rgbFormat, basisFallbackFormat = 14, imageArray = new Array(imageCount);
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let fallbackMode = !1;
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if (!basisFile.startTranscoding())
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return basisFile.close(), basisFile.delete(), {
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type: "transcode",
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requestID: message.requestID,
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success: !1,
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imageArray: null
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};
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for (let i = 0; i < imageCount; i++) {
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const levels = basisFile.getNumLevels(i), imageResource = {
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imageID: i,
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levelArray: new Array(),
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width: null,
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height: null
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};
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for (let j = 0; j < levels; j++) {
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const format = fallbackMode ? basisFallbackFormat : basisFormat, width = basisFile.getImageWidth(i, j), height = basisFile.getImageHeight(i, j), byteSize = basisFile.getImageTranscodedSizeInBytes(i, j, format), alignedWidth = width + 3 & -4, alignedHeight = height + 3 & -4;
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j === 0 && (imageResource.width = alignedWidth, imageResource.height = alignedHeight);
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const imageBuffer = new Uint8Array(byteSize);
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if (!basisFile.transcodeImage(imageBuffer, i, j, format, !1, !1)) {
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if (fallbackMode)
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return console.error(`Basis failed to transcode image ${i}, level ${j}!`), { type: "transcode", requestID: message.requestID, success: !1 };
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console.warn(`Basis failed to transcode image ${i}, level ${j}! Retrying to an uncompressed texture format!`), i = -1, fallbackMode = !0;
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break;
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}
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imageResource.levelArray.push({
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levelID: j,
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levelWidth: width,
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levelHeight: height,
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levelBuffer: imageBuffer
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});
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}
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imageArray[i] = imageResource;
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}
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return basisFile.close(), basisFile.delete(), {
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type: "transcode",
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requestID: message.requestID,
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success: !0,
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basisFormat: fallbackMode ? basisFallbackFormat : basisFormat,
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imageArray
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};
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}
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};
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self.onmessage = (e) => {
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const msg = e.data, response = messageHandlers[msg.type](msg);
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response && self.postMessage(response);
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};
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}
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export {
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TranscoderWorkerWrapper
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};
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//# sourceMappingURL=TranscoderWorkerWrapper.mjs.map
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