Question

我正在尝试创建一个CIColorClampFilter https://developer.apple.com/library/mac/documentation/GraphicsImaging/Reference/CoreImageFilterReference/index.html#//apple_ref/doc/filter/ci/CIColorClamp

它说我可以为＆＃34; inputMinComponents＆＃34;设置密钥。作为[0,0,0,0]或我想要的任何RGB值。

但是这段代码：

filter = CIFilter(name:"CIColorClamp")
filter.setValue(ciImage, forKey: kCIInputImageKey)
filter.setValue([0,0,0,0], forKey: "inputMinComponents")

导致此错误：

CI internal error, type mismatch between kernel parameter 1 and argument

我已经四处查看其他CIColorClamp示例，但一无所获。

你知道我试图通过＆＃34; inputMinComponents＆＃34;的价值是怎么回事？键？

Answer 1

显然，快速的智能投射不起作用你必须创造一个CIVector

filter = CIFilter(name:"CIColorClamp")
filter.setValue(ciImage, forKey: kCIInputImageKey)
var lowerLevel = CIVector(x: 0.1, y: 0.1, z: 0.3, w: 0)
filter.setValue(lowerLevel, forKey: "inputMinComponents")
var upperLevel = CIVector(x: 0.5, y: 0.7, z: 0.9, w: 1)
filter.setValue(upperLevel, forKey: "inputMaxComponents")

CI内部错误，内核参数1和参数之间的类型不匹配

1 个答案: