git.r.bdr.sh - rbdr/captura/blob - Captura/Data/GifRenderer.swift

   1 /*
   2  Copyright (C) 2024 Rubén Beltrán del Río
   3
   4  This program is free software: you can redistribute it and/or modify
   5  it under the terms of the GNU General Public License as published by
   6  the Free Software Foundation, either version 3 of the License, or
   7  (at your option) any later version.
   8
   9  This program is distributed in the hope that it will be useful,
  10  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  GNU General Public License for more details.
  13
  14  You should have received a copy of the GNU General Public License
  15  along with this program. If not, see https://captura.tranquil.systems.
  16  */
  17 import UniformTypeIdentifiers
  18 import SwiftUI
  19 import CoreGraphics
  20
  21 struct GifRenderer {
  22   static func render(_ images: [CGImage], at fps: Int, to url: URL) async {
  23     let framedelay = String(format: "%.3f", 1.0 / Double(fps))
  24     let fileProperties = [kCGImagePropertyGIFDictionary as String: [kCGImagePropertyGIFLoopCount as String: 0]]
  25     let gifProperties = [kCGImagePropertyGIFDictionary as String: [kCGImagePropertyGIFUnclampedDelayTime as String: framedelay]]
  26     let cfURL = url as CFURL
  27     if let destination = CGImageDestinationCreateWithURL(cfURL, UTType.gif.identifier as CFString, images.count, nil) {
  28       CGImageDestinationSetProperties(destination, fileProperties as CFDictionary?)
  29       for image in images {
  30         CGImageDestinationAddImage(destination, image, gifProperties as CFDictionary?)
  31       }
  32       CGImageDestinationFinalize(destination)
  33     }
  34   }
  35 }