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mdx-m3-viewer

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A browser WebGL model viewer. Mainly focused on models of the games Warcraft 3 and Starcraft 2.

32 lines (26 loc) 908 B
/** * Search for the MPQ header - MPQ\x1A. * The header can be on any 512 bytes boundry offset. */ export function searchHeader(typedArray: Uint8Array) { let offset = -1; for (let i = 0, l = Math.ceil(typedArray.byteLength / 512); i < l; i++) { let base = i * 512; // Test 'MPQ\x1A'. if (typedArray[base] === 77 && typedArray[base + 1] === 80 && typedArray[base + 2] === 81 && typedArray[base + 3] === 26) { offset = base; } } return offset; } /** * Checks whether the given buffer is either a Warcraft 3 map or otherwise a generic MPQ archive. */ export function isArchive(typedArray: Uint8Array) { // Check for the map identifier - HM3W if (typedArray[0] === 72 && typedArray[1] === 77 && typedArray[2] === 51 && typedArray[3] === 87) { return true; } // Look for an MPQ header. return searchHeader(typedArray) !== -1; }