Doggie - A Cross-platform Library for Swift

Doggie is a foundational library for Apple’s swift. It includes mathematics, accelerate, signal processing and graphic functions.

Apps Using This Library

Features

• accelerate, signal processing, fourier and convolution
• complex number, point, vector and 2D/3D transformation
• bezier curve
• polynomial
• color and color space
• shape and boolean operation ```swift let shape = try Shape(code: “M100 0c0-100-236.60 36.60-150 86.60S36.60-136.60-50-86.60 100 100 100 0z”)

let region = ShapeRegion(shape, winding: .nonZero) let ellipse = ShapeRegion(ellipseIn: shape.boundary)

operation | preview
--- | ---
``region.union(ellipse)`` | ![union](https://www.gitlink.org.cn/api/dnrops/doggie/raw/docs/images/readme/ShapeRegion/union.png?ref=main)
``region.intersection(ellipse)`` | ![union](https://www.gitlink.org.cn/api/dnrops/doggie/raw/docs/images/readme/ShapeRegion/intersection.png?ref=main)
``ellipse.subtracting(region)`` | ![union](https://www.gitlink.org.cn/api/dnrops/doggie/raw/docs/images/readme/ShapeRegion/subtracting.png?ref=main)
``region.subtracting(ellipse)`` | ![union](https://www.gitlink.org.cn/api/dnrops/doggie/raw/docs/images/readme/ShapeRegion/subtracting2.png?ref=main)
``region.symmetricDifference(ellipse)`` | ![union](https://www.gitlink.org.cn/api/dnrops/doggie/raw/docs/images/readme/ShapeRegion/symmetricDifference.png?ref=main)
- [font](/dnrops/doggie/tree/main/docs/Font.md)
```swift
let collection = try FontCollection(data: fontFileData)

if let font = collection.first?.with(size: 64) {

    let string = "Doggie\u{0301}".precomposedStringWithCanonicalMapping

    let glyphs = font.glyphs(with: string.unicodeScalars)
    let advances = glyphs.map { font.advance(forGlyph: $0) }.reductions(0, +)

    var shape = Shape()

    for (advance, glyph) in zip(advances, glyphs) {
        var outline = font.shape(forGlyph: glyph)
        outline.center.x += advance
        shape.append(contentsOf: outline.identity)
    }

    print(shape.encode())
}

• image and graphics with 2D/3D drawing ```swift

let context = ImageContext(width: 100, height: 100, colorSpace: ColorSpace.sRGB)

let ellipse1 = Shape(ellipseIn: Rect(x: 10, y: 35, width: 55, height: 55)) let ellipse2 = Shape(ellipseIn: Rect(x: 35, y: 10, width: 55, height: 55))

context.draw(shape: ellipse1, winding: .nonZero, color: RGBColorModel(red: 247/255, green: 217/255, blue: 12/255)) context.draw(shape: ellipse1, stroke: Stroke(width: 1, cap: .round, join: .round, color: RGBColorModel())) context.draw(shape: ellipse2, winding: .nonZero, color: RGBColorModel(red: 234/255, green: 24/255, blue: 71/255)) context.draw(shape: ellipse2, stroke: Stroke(width: 1, cap: .round, join: .round, color: RGBColorModel()))

let image: Image = context.image

![drawing sample](https://www.gitlink.org.cn/api/dnrops/doggie/raw/docs/images/readme/drawing_sample.png?ref=main)
- others
```svg
<svg width="200" height="200" viewBox="0 0 220 220"
     xmlns="http://www.w3.org/2000/svg">
  <filter id="displacementFilter">
     <feTurbulence type="turbulence" baseFrequency="0.05"
        numOctaves="2" result="turbulence"/>
     <feDisplacementMap in2="turbulence" in="SourceGraphic"
        scale="50" xChannelSelector="R" yChannelSelector="G"/>
  </filter>

  <circle cx="100" cy="100" r="100"
     style="filter: url(#displacementFilter)"/>
</svg>

let context = ImageContext<Gray16ColorPixel>(width: 220, height: 220, colorSpace: .default)

context.draw(ellipseIn: Rect(x: 0, y: 0, width: 200, height: 200), color: .black)

var image = context.image

let turbulence: Image<RGBA32ColorPixel> = SVGTurbulence(220, 220, .turbulence, nil, .identity, 0, 0.05, 2)

image = DisplacementMap(image, turbulence, 0, 1, 50)

Documents

Documents can find in here.

Status

ColorSpace

Format

• ICC
• CIEXYZ
• CIELab
• CIELuv
• Calibrated Gray
• Calibrated RGB

Rendering Intent

• perceptual
• saturation
• absolute colorimetric
• relative colorimetric

ImageRep

• bmp
• gif
• jpeg
• jpeg2000
• png
• tiff
• webp

Font

Format

• TrueType
• TrueType/TTC
• OpenType
• OpenType/CFF
• OpenType/CFF2
• WOFF
• WOFF/CFF
• WOFF/CFF2
• WOFF2

SFNT Tables

• HEAD
• POST
• OS/2
• MAXP
• CMAP
• NAME
• HHEA
• HMTX
• VHEA
• VMTX
• LOCA
• GLYF
• SBIX
• FEAT
• KERX
• MORX
  • Rearrangement
  • Contextual
  • Ligature
  • Noncontextual
  • Insertion
• GSUB
• GPOS
• GDEF
• CFF
• CFF2

CMAP

Platform

The table below lists the available platform/specific values in the order.

platform	specific	Description
0	max( <= 4 )	Unicode
3	10	Windows, Unicode UCS-4
3	1	Windows, Unicode BMP (UCS-2)

Format

• Format 0
• Format 4
• Format 12
• Format 14 (Unicode Variation Selectors)

How To Contribute

It’s welcome everyone to create a pull request.

License

Doggie is licensed under the MIT license.