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Questions tagged [nsimage]

on Mac OS X, an NSImage object is a high-level class for manipulating image data

681 questions
81
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9 answers

How to save a NSImage as a new file

How can I save a NSImage as a new file (png, jpg, ...) in a certain directory?
burki
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31
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6 answers

How to save PNG file from NSImage (retina issues)

I'm doing some operations on images, and after I'm done, I want to save the image as PNG on the disk. I'm doing the following: + (void)saveImage:(NSImage *)image atPath:(NSString *)path { [image lockFocus] ; NSBitmapImageRep…
Ludovic Landry
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30
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5 answers

NSImage size not real size with some pictures?

I see that sometimes NSImage size is not real size (with some pictures) and CIImage size is always real. I was testing with this image. This is source code which I wrote for testing: NSImage *_imageNSImage = [[NSImage…
Justin Boo
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28
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12 answers

How to resize NSImage?

I have an NSBitmapImageRep which is WxH size. I create NSImage and call addRepresentation:. Then I need to resize the NSImage. I tried setSize method but it doesn't work. What should I do?
hockeyman
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27
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1 answer

Getting NSImage from CGImageRef

I am trying process an image in CoreGraphics and then return the processed image back to an NSImage for saving and displaying. I have ample resources on how to perform these functions in iOS but the helper methods seem to be missing in NSImage. In…
MobileOverlord
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23
votes
6 answers

Get the correct image width and height of an NSImage

I use the code below to get the width and height of a NSImage: NSImage *image = [[[NSImage alloc] initWithContentsOfFile:[NSString stringWithFormat:s]] autorelease]; imageWidth=[image size].width; imageHeight=[image…
arachide
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21
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1 answer

NSImage to NSData as PNG Swift

I am writing a Mac app based on an iOS app. The code below converts a UIImage to NSData to upload to Parse.com. I would like to do the same for Mac but I do not seem to be able to convert it to NSData. What should I be doing? Thanks var image =…
Tom Coomer
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21
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5 answers

Swift NSImage to CGImage

How can I convert a NSImage to CGImage in Swift? In Objective-C I did it like this: - (CGImageRef)CGImage { NSData *imageData = self.TIFFRepresentation; CGImageSourceRef source = CGImageSourceCreateWithData((__bridge CFDataRef)imageData,…
Lupurus
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19
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4 answers

How to draw a NSImage like images in NSButtons (with a deepness)?

Is there any way to draw an NSImage like images in NSButtons or other cocoa interface elements? Here are examples: Apple uses pdf's with black icons:
Flocked
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18
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2 answers

Swift on MacOS - How to save NSImage to disk

I have the following code working: let myImage = NSImage(named: "my-image.png") filter.setValue(myImage, forKey: kCIInputImageKey) filter.setValue(0.5, forKey: kCIInputIntensityKey) let resultImage = filter.outputImage How can I save the filtered…
Pono
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18
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4 answers

How do I take a "screenshot" of an NSView?

I need to take the contents of an NSView and put them in an NSImage, for an experimental project. Is this possible? I did some Googling, tried two methods that I found - but they didn't really work. Any suggestions?
Debashis
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18
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3 answers

Converting CIImage Into NSImage

I'm playing with the Core Image framework. As I understand, if I have an image (NSImage), it needs to be converted into CIImage, first. I can do that. NSImage *im1 = [[NSImage alloc] initWithContentsOfFile:imagepath]; NSRect rect1;rect1.size.width…
El Tomato
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16
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6 answers

Turning an NSImage* into a CGImageRef?

Is there an easy way to do this that works in 10.5? In 10.6 I can use nsImage CGImageForProposedRect: NULL context: NULL hints: NULL If I'm not using 1b black and white images (Like Group 4 TIFF), I can use bitmaps, but cgbitmaps seem to not like…
Brian Postow
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16
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2 answers

How to composite several NSImages into one big image?

I have a collection of objects which describe an image-name, its size and it's X/Y location. The collection is sorted by "layers", so I can composite the images in a sort of painter's algorithm. From this, I can determine the rectangle necessary to…
Olie
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16
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3 answers

NSImage to NSBitmapImageRep

How to convert NSImage to NSBitmapImageRep? I have code: - (NSBitmapImageRep *)bitmapImageRepresentation { NSBitmapImageRep *ret = (NSBitmapImageRep *)[self representations]; if(![ret isKindOfClass:[NSBitmapImageRep class]]) { …
hockeyman
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