使用MacOS的GPUImage - 如何将已处理的文件保存到磁盘

时间:2016-10-10 19:23:16

标签: swift3 gpuimage nsimage

我目前正在将CoreImage中的一些代码移植到GPUImage,并且在将已处理的文件保存到磁盘时遇到问题。虽然这适用于CoreImage:

guard
    let blurFilter = CIFilter(name: "CIGaussianBlur"),
    let imageURL = Bundle.main.url(forResource: "my-image", withExtension: "png"),
    let ciImage = CIImage(contentsOf: imageURL)
else {
    return
}

blurFilter.setValue(ciImage, forKey: kCIInputImageKey)
blurFilter.setValue(100, forKey: kCIInputRadiusKey)

guard
    let result = blurFilter.outputImage,
    let cgImage = context.createCGImage(result, from: result.extent)
else {
    return
}

let destinationURL = desktopURL.appendingPathComponent("output.png")
let nsImage = NSImage(cgImage: cgImage, size: ciImage.extent.size)

以下代码移植到GPUImage:

let testImage = NSImage(named:"my-image.png")!
let blurFilter = GaussianBlur()
let filteredImage = testImage.filterWithOperation(blurFilter)

let desktopURL = FileManager.default.urls(for: .desktopDirectory, in: .userDomainMask).first!
let destinationURL = desktopURL.appendingPathComponent("output.png")
let nsImage = NSImage(nsImage: filteredImage, size: filteredImage.extent.size)

提供与最后一行有关的以下错误消息:

Value type of 'NSImage' has no member 'extent'

1 个答案:

答案 0 :(得分:2)

filteredImage是一个NSImage。在你的核心图像代码中,ciImage是一个很好的CIImage。 CIImage有extent属性,NSImage没有。

您无需在第二个代码中创建nsImagefilteredImage已经是NSImage。你已经完成了。