mirror of
https://github.com/apple/swift.git
synced 2025-12-21 12:14:44 +01:00
5936a04510
* Accelerate vImage Swift Overlays A suite of functions, enumerations, and option sets to make working with vImage in Swift simpler. * vImage_Buffer - new initializers to instantiate and initialize buffers with a single function call. * vImage_Buffer - new functions to copy buffers and create CGImage instances from contents. * vImage_CGImageFormat - new initializers. * vImage_CGImageFormat - new equivalence operator. * vImageConverter - methods to wrap free functions. * vImageConverter - new make and convert functions. * vImageCVImageFormat - new make functions. * vImageCVImageFormat - methods to wrap free functions. * vImage_Error - errorDescription function. * vImage flags as an option set. * Add new methods for generating CV -> CG and CG -> CV converters. * update comments: `height` and `width` to `size`. * `vImage_CGImageFormat.componentCount` should be `Int`. * `vImage_CGImageFormat.componentCount` should be `Int` * Move `self.init()` to after the size check for kvImageNoAllocate init. * Buffer initializers to width and height rather than size. * change vImage_CGImageFormat lightweight initializer to accept Int for `bitsPerComponent` and `bitsPerPixel`. * Flesh out docs for vImage_Buffer.size * Remove faux initializer in favor of new static function: `preferredAlignmentAndRowBytes`. * Change functions to use proper error handling rather than inout error codes. * Removed `flags` from basic init. The only real flag to pass here is print diagnostics to console, and I now throw proper errors. * Tests to check error throwing for buffer copy. * remove unnecessary import, add missing docs. * Add comments to error enums. * Fix bug creating string from format code. * Make `vImageCVImageFormat.formatCode` a `UInt32`. * Remove equivalence operator from `CGImageFormat`.
82 lines
3.0 KiB
Swift
82 lines
3.0 KiB
Swift
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// vImage_CGImageFormat
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
@available(iOS 9999, OSX 9999, tvOS 9999, watchOS 9999, *)
|
|
extension vImage_CGImageFormat {
|
|
|
|
/// Initializes an image format from a Core Graphics image.
|
|
///
|
|
/// - Parameter cgImage: The image from which to derive the image format.
|
|
///
|
|
/// - Returns: An initialized `vImage_CGImageFormat`.
|
|
public init?(cgImage: CGImage) {
|
|
guard
|
|
let colorSpace = cgImage.colorSpace else {
|
|
return nil
|
|
}
|
|
|
|
self = vImage_CGImageFormat(
|
|
bitsPerComponent: UInt32(cgImage.bitsPerComponent),
|
|
bitsPerPixel: UInt32(cgImage.bitsPerPixel),
|
|
colorSpace: Unmanaged.passRetained(colorSpace),
|
|
bitmapInfo: cgImage.bitmapInfo,
|
|
version: 0,
|
|
decode: nil,
|
|
renderingIntent: cgImage.renderingIntent)
|
|
}
|
|
|
|
/// Initializes an image format.
|
|
///
|
|
/// - Parameter bitsPerComponent: The number of bits needed to represent one
|
|
/// channel of data in one pixel.
|
|
/// - Parameter bitsPerPixel: The number of bits needed to represent one pixel.
|
|
/// - Parameter colorSpace: The color space for the format.
|
|
/// - Parameter bitmapInfo: The component information describing the color channels.
|
|
/// - Parameter renderingIntent: A rendering intent constant that specifies how
|
|
/// Core Graphics should handle colors that are not located within the gamut of the
|
|
/// destination color space of a graphics context.
|
|
///
|
|
/// - Returns: An initialized `vImage_CGImageFormat`.
|
|
public init?(bitsPerComponent: Int,
|
|
bitsPerPixel: Int,
|
|
colorSpace: CGColorSpace,
|
|
bitmapInfo: CGBitmapInfo,
|
|
renderingIntent: CGColorRenderingIntent = .defaultIntent) {
|
|
|
|
if bitsPerComponent < 1 || bitsPerPixel < 0 {
|
|
return nil
|
|
}
|
|
|
|
self = vImage_CGImageFormat(
|
|
bitsPerComponent: UInt32(bitsPerComponent),
|
|
bitsPerPixel: UInt32(bitsPerPixel),
|
|
colorSpace: Unmanaged.passRetained(colorSpace),
|
|
bitmapInfo: bitmapInfo,
|
|
version: 0,
|
|
decode: nil,
|
|
renderingIntent: renderingIntent)
|
|
}
|
|
|
|
/// The number of color channels.
|
|
public var componentCount: Int {
|
|
var mutableSelf = self
|
|
return Int(vImageCGImageFormat_GetComponentCount(&mutableSelf))
|
|
}
|
|
}
|
|
|