retina-display

I am trying to take a retina screenshot programmatically and I have tried every approach found online, but I was not able to get the screenshot to be retina. I understand the following private API: UIGetScreenImage(); cannot be used as Apple will reject your app. However, this method returns exactly what I need (640x960 screenshot of the screen). I have tried this method on my iPhone 4 as well as the iPhone 4 simulator on retina hardware, but the resulting image is always 320x480. -(UIImage *)captureView { AppDelegate *appdelegate = [[UIApplication sharedApplication]delegate]; if ([[UIScreen

I have a 1st generation iPad Mini ( Model A1432 ) with a screen resolution of 1024x768 ( documentation ). I have the following code in my app: CGRect screenBounds = [[UIScreen mainScreen] bounds]; CGFloat screenScale = [[UIScreen mainScreen] scale]; CGSize screenSize = CGSizeMake(screenBounds.size.width * screenScale, screenBounds.size.height * screenScale); screenSize.height and screenSize.width report: 2048x1536, which is wrong. The screenScale value is 2, but it is my understanding that it should only be 2 for retina screens, which the 1st generation iPad Mini is not. Any ideas why this

The website I'm working on can be seen here . If you check out the 'About' or 'Contact' section on iPad 3 or iPhone 4 the background looks all crazy pixelated. I've got the background-size set to cover so that when the user resizes it it scales appropriately, however on iPad or iPhone it looks terrible. Any help or tips on how to fix this for devices @media only screen and (min-device-pixel-ratio: 2) ? Thank you. It's because you are using background-attachment:fixed - for whatever reason this when used with background-size: cover on iOS causes this behavior. (I had this same bug at http://jag

How can I detect if an iPhone has a retina display or not? Is there a reliable way? Either pure PHP or preferably Zend Framework way of doing this. You must consider the fact that you are trying to get client side information on the server side. It would seem that you are unable to detect the display with pure PHP or Zend framework. It furthermore seems like the UserAgent information from the client, that you might access from PHP is based upon the OS, not the hardware, and thusly does not help you. You might be interested in reading the following article which much more eloquently and

Looking at a screenshot I took on a MacBook Pro with Retina display and running OS X 10.11, I found that it contained these chunks: IHDR, iCCP, pHYs, iTXt, iDOT, IDAT…, IEND All of these are part of the 2003 spec , except for iDOT which is a small (28 bytes) chunk. According to the chunk naming conventions , the fact that its second letter is capital should indicate that it's a chunk with a public specification. I couldn't find its specification anywhere yet though. It's not listed in the Register of public PNG chunks and keywords, Version 1.4.6 either, although that appears to be the latest

In my iOS application, I am trying to draw curves using CoreGraphics. The drawing itself works fine, but on the retina display the image gets drawn using the same resolution, and does not get pixel doubled. The result is a pixelated image. I am drawing using the following functions: - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; CGPoint currentPoint = [touch locationInView:self.canvasView]; UIGraphicsBeginImageContext(self.canvasView.frame.size); [canvasView.image drawInRect:self.canvasView.frame]; CGContextRef ctx =