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var
WicImg: TWICImage;
begin
WicImg := TWICImage.Create;
WicImg.LoadFromFile('1.jpg');
{在窗体上预览图片}
Canvas.Draw(0, 0, WicImg);
{转换为 png}
WicImg.ImageFormat := TWICImageFormat.wifPng;
WicImg.SaveToFile('1.png');
WicImg.Free;
ReportMemoryLeaksOnShutdown := DebugHook <> 0;