Laurent Sansonetti
lsans****@apple*****
Thu Jan 25 19:45:54 JST 2007
Hi Benjamin,
Actually I don't think [NSBitmapImagerep -writeToFile:automatically:]
exists.
At a glance, according to the reference [1], you should do
data = bitmap.bitmapData
File.open('/path/bitmap', 'w') { |io| io.write data }
Laurent
[1]: http://developer.apple.com/documentation/Cocoa/Reference/ApplicationKit/Classes/NSBitmapImageRep_Class/Reference/Reference.html
On Jan 25, 2007, at 5:14 AM, Benjamin Jackson wrote:
> Trying to save an image using the latest stable build:
>
> url = NSURL.fileURLWithPath(path)
> image = CIImage.imageWithContentsOfURL(url)
> bitmap =
> NSBitmapImageRep
> .alloc
> .initWithBitmapDataPlanes_pixelsWide_pixelsHigh_bitsPerSample_samplesPerPixel_hasAlpha_isPlanar_colorSpaceName_bytesPerRow_bitsPerPixel
> (
> nil, image.extent.size.width, image.extent.size.height, 8, 4,
> true, false, NSDeviceRGBColorSpace, 0, 0)
>
> context = NSGraphicsContext.graphicsContextWithBitmapImageRep
> bitmap
> NSGraphicsContext.saveGraphicsState
> NSGraphicsContext.setCurrentContext context
> context.CIContext.drawImage_atPoint_fromRect image,
> CGPoint.new(0,0), image.extent
> NSGraphicsContext.restoreGraphicsState
> bitmap.writeToFile_atomically("/Users/bjackson/Desktop/
> test.bmp", true)
>
>
> /Library/Frameworks/RubyCocoa.framework/Versions/A/Resources/ruby/
> osx/objc/oc_wrapper.rb:48:in
> `NSApplicationMain': NSApplicationMain -
> RBException_OSX::OCMessageSendException -
> NSBitmapImageRep#writeToFile:atomically: - Can't get Objective-C
> method signature for selector 'writeToFile:atomically:' of receiver
> #<OSX::NSBitmapImageRep:0x154f7e class='NSBitmapImageRep'
> id=0x1151420> (OSX::OCException)
>
> Tried using the method with a "hello world" NSString and an empty
> NSData object, and both compiled without error.
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