40 lines
1.8 KiB
Swift
40 lines
1.8 KiB
Swift
import Foundation
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enum NativeCore {
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private static let library = dlopen("@rpath/native_core_ffi.framework/native_core_ffi", RTLD_NOW)
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private static func symbol<T>(_ name: String, as type: T.Type) -> T? {
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guard let library, let symbol = dlsym(library, name) else { return nil }
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return unsafeBitCast(symbol, to: type)
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}
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private static let coreThumbhash = symbol("native_core_thumbhash", as: NativeCoreThumbhashFn.self)
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private static let coreJxlDecode = symbol("native_core_jxl_decode", as: NativeCoreJxlDecodeFn.self)
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private static let coreCancel = symbol("native_core_cancel", as: NativeCoreCancelFn.self)
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static func thumbhash(_ hash: Data) -> (width: Int, height: Int, pointer: UnsafeMutableRawPointer)? {
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guard let coreThumbhash else { return nil }
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var width: Int32 = 0
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var height: Int32 = 0
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return hash.withUnsafeBytes { bytes in
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guard let pointer = coreThumbhash(bytes.bindMemory(to: UInt8.self).baseAddress, bytes.count, &width, &height)
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else { return nil }
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return (Int(width), Int(height), UnsafeMutableRawPointer(pointer))
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}
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}
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static func decodeJxl(_ data: Data, targetWidth: Int64?, targetHeight: Int64?, maxPixelSize: Int, cancelled: UnsafeMutablePointer<Bool>) -> (width: Int, height: Int, pointer: UnsafeMutableRawPointer)? {
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guard let coreJxlDecode else { return nil }
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var info = NativeCoreImageInfo()
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return data.withUnsafeBytes { bytes in
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guard let pointer = coreJxlDecode(bytes.bindMemory(to: UInt8.self).baseAddress, bytes.count, false, UInt32(clamping: targetWidth ?? 0), UInt32(clamping: targetHeight ?? 0), UInt32(clamping: maxPixelSize), cancelled, &info)
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else { return nil }
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return (Int(info.width), Int(info.height), UnsafeMutableRawPointer(pointer))
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}
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}
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static func cancel(_ flag: UnsafeMutablePointer<Bool>) {
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coreCancel?(flag)
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}
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}
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