Generates an image that looks like LEGO Art.

Related tags

Image LegoArtFilter
Overview

LegoArtFilter

Generates an image that looks like LEGO Art.
This library supports both iOS (14≤) and macOS (11≤).

Usage

// Get CGImage from CIImage
let input = CIImage()
if let legoArt = LegoArt(ciImage: input) {
    let output = legoArt.exportCGImage()
}

// Get UIImage from UIImage
let input = UIImage()
if let legoArt = LegoArt(from: input) {
    let output = legoArt.exportUIImage()
}

// Get NSImage from NSImage
let input = NSImage()
if let legoArt = LegoArt(from: input) {
    let output = legoArt.exportNSImage()
}

// Use the options
// baseColor:      It is used as a base for transparent images such as PNG.
// StudType:       It is reflected in the appearance of the brick.
//                 (round/round plate/square/square plate)
// maxStud:        Determines the maximum bricks number of the generated image.
// studPixelWidth: Specifies the pixel width of the actual brick to be drawn.
let legoArt = LegoArt(ciImage: CIImage,
                      baseColor: CGColor,
                      studType: StudType,
                      maxStud: Int,
                      studPixelWidth: Int)

LICENSE

Copyright (c) 2021 Takuto NAKAMURA (Kyome)

You are free to use it as long as it is not for commercial use.

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Comments
  • Improve performance

    Improve performance

    概要

    LegoColor(r:g:b:) の処理に時間がかかるため、rgb の値をキーとしてキャッシュするようにしました。

    私のアイコンを StudType: Round ・ Max Stud: 128 で試したところ、処理時間が約 1/33 になりました。 同じ色を使っている画像ほど処理が速くなります。 逆にほぼ異なる色だと、キャッシュを捜査する分だけ処理が遅くなりますが、具体的な時間は計測していません。

    処理時間の計測は colorMap 生成の前後に以下を仕込んで行いました。

    +       let startDate = Date()
        let colorMap = (0 ..< Int(size.width * size.height))
            .map { i -> LegoColor in
                let r = CGFloat(rgbaData[4 * i]) / 255.0
                let g = CGFloat(rgbaData[4 * i + 1]) / 255.0
                let b = CGFloat(rgbaData[4 * i + 2]) / 255.0
                return LegoColor(r: r, g: g, b: b)
            }
+       print("Time: \(Date().timeIntervalSince(startDate))")

    Before

    |Time| |:--| |2.201616048812866| |2.205173969268799| |2.2091729640960693| |2.2038110494613647| |2.204527974128723|

    After

    |time| |:--| |0.06664800643920898| |0.06678497791290283| |0.06787693500518799| |0.06665492057800293| |0.06649196147918701|

    スクリーンショット 2021-10-18 20 35 40
    opened by uhooi 3
  • Add examples

    Add examples

    概要

    デモは同じリポジトリにあるほうがわかりやすいため、 LegoArtFilterDemo の内容を Examples フォルダに追加しました。 ライブラリをローカル参照するように変更したため、デモを開発環境として使うこともできます。

    参考リンク

    • https://speakerdeck.com/uhooi/create-swift-library
    • https://speakerdeck.com/niw/shi-jian-ios-opunsosupuroziekutofalseshi-mefang
    opened by uhooi 2
Releases(1.0.0)
Owner
Takuto NAKAMURA (Kyome)
macOS, iOS, Android developer. Swift / Objective-C / Javascript / Java / Python / C / C++ / C#
Takuto NAKAMURA (Kyome)
GitHub
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