NSImage from a 1D pixel array?

Question

I have a large 1D dynamic array in my program that represents a FITS image on disk i.e. it holds all the pixel values of the image. The type of the array is double

Answer 1

Here's the solution with your code. This was extended to support all 3 channels. Each channel is 16 bits. Note that I assign imageArray[i] to each channel. This is only because I currently haven't written the code which can read colour FITS files, so to test things out I'm just assigning the image to each channel. The result is, of course, a grayscale image on screen. But if one wants, it can easily be modified such that Red is assigned to Red and so on.

NSBitmapImageRep *colorRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:nil
                                                                        pixelsWide:width
                                                                        pixelsHigh:height
                                                                     bitsPerSample:16
                                                                   samplesPerPixel:3
                                                                          hasAlpha:NO
                                                                          isPlanar:NO
                                                                    colorSpaceName:NSCalibratedRGBColorSpace
                                                                       bytesPerRow:(3*2*width)
                                                                      bitsPerPixel:48];

    rowBytes = [greyRep bytesPerRow];
    NSLog(@"Row Bytes: %d",rowBytes);
    pix = [colorRep bitmapData];

    for(i=0;i