NSImageをリサイズ（アンチエイリアス解除）pattern 4

指定ファイルをNSImageに読み込んで、アンチエイリアスを使用せずに指定倍率に拡大するAppleScriptです。

▲Original & Resized Image (x10)

AppleScript名：NSImageをリサイズ（アンチエイリアス解除）pattern 4

— Created 2017-02-03 by Takaaki Naganoya
— Modified 2017-03-22 by Shane Stanley
use AppleScript version "2.4"
use scripting additions
use framework "Foundation"
use framework "AppKit"

set aPath to POSIX path of (choose file of type {"public.image"} with prompt "Select Image file to scale up (x10)")
set aNSImage to current application’s NSImage’s alloc()’s initWithContentsOfFile:aPath

set resizedImg to my resizeNSImageWithoutAntlialias:aNSImage toScale:10

set aDesktopPath to (current application’s NSProcessInfo’s processInfo()’s environment()’s objectForKey:("HOME"))’s stringByAppendingString:"/Desktop/"
set savePath to aDesktopPath’s stringByAppendingString:((current application’s NSUUID’s UUID()’s UUIDString())’s stringByAppendingString:".png")

set fRes to saveNSImageAtPathAsPNG(resizedImg, savePath) of me

–NSImageを指定倍率で拡大（アンチエイリアス解除状態で）
on resizeNSImageWithoutAntlialias:aSourceImg toScale:imgScale
　　set aSize to aSourceImg’s |size|()
　　set aWidth to (aSize’s width) * imgScale
　　set aHeight to (aSize’s height) * imgScale
　　
　　set aRep to current application’s NSBitmapImageRep’s alloc()’s initWithBitmapDataPlanes:(missing value) pixelsWide:aWidth pixelsHigh:aHeight bitsPerSample:8 samplesPerPixel:4 hasAlpha:true isPlanar:false colorSpaceName:(current application’s NSCalibratedRGBColorSpace) bytesPerRow:0 bitsPerPixel:0
　　
　　set newSize to {width:aWidth, height:aHeight}
　　aRep’s setSize:newSize
　　
　　current application’s NSGraphicsContext’s saveGraphicsState()
　　
　　set theContext to current application’s NSGraphicsContext’s graphicsContextWithBitmapImageRep:aRep
　　current application’s NSGraphicsContext’s setCurrentContext:theContext
　　theContext’s setShouldAntialias:false
　　theContext’s setImageInterpolation:(current application’s NSImageInterpolationNone)
　　
　　aSourceImg’s drawInRect:(current application’s NSMakeRect(0, 0, aWidth, aHeight)) fromRect:(current application’s NSZeroRect) operation:(current application’s NSCompositeCopy) fraction:(1.0)
　　
　　current application’s NSGraphicsContext’s restoreGraphicsState()
　　
　　set newImg to current application’s NSImage’s alloc()’s initWithSize:newSize
　　newImg’s addRepresentation:aRep
　　
　　return newImg
end resizeNSImageWithoutAntlialias:toScale:

–NSImageを指定パスにPNG形式で保存
on saveNSImageAtPathAsPNG(anImage, outPath)
　　set imageRep to anImage’s TIFFRepresentation()
　　set aRawimg to current application’s NSBitmapImageRep’s imageRepWithData:imageRep
　　
　　set pathString to current application’s NSString’s stringWithString:outPath
　　set newPath to pathString’s stringByExpandingTildeInPath()
　　
　　set myNewImageData to (aRawimg’s representationUsingType:(current application’s NSPNGFileType) |properties|:(missing value))
　　set aRes to (myNewImageData’s writeToFile:newPath atomically:true) as boolean
　　
　　return aRes
end saveNSImageAtPathAsPNG