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2014/10/15 ¤U¤È 10:05:01

iphone Programming Glossary: cgcontextrotatectm

Resizing UIimages pulled from the Camera also ROTATES the UIimage?

http://stackoverflow.com/questions/1260249/resizing-uiimages-pulled-from-the-camera-also-rotates-the-uiimage

imageRef colorSpaceInfo bitmapInfo if sourceImage.imageOrientation UIImageOrientationLeft CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationRight.. bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationRight CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap targetWidth 0 else if sourceImage.imageOrientation UIImageOrientationUp.. UIImageOrientationDown CGContextTranslateCTM bitmap targetWidth targetHeight CGContextRotateCTM bitmap radians 180. CGContextDrawImage bitmap CGRectMake 0 0 targetWidth targetHeight imageRef CGImageRef..

How to Rotate a UIImage 90 degrees?

http://stackoverflow.com/questions/1315251/how-to-rotate-a-uiimage-90-degrees

imageRef colorSpaceInfo bitmapInfo if sourceImage.imageOrientation UIImageOrientationRight CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationLeft.. bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationLeft CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap targetWidth 0 else if sourceImage.imageOrientation UIImageOrientationDown.. UIImageOrientationDown NOTHING else if sourceImage.imageOrientation UIImageOrientationUp CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight CGContextDrawImage bitmap CGRectMake 0..

Resizing UIimages pulled from the Camera also ROTATES the UIimage?

http://stackoverflow.com/questions/1260249/resizing-uiimages-pulled-from-the-camera-also-rotates-the-uiimage

CGImageGetBitsPerComponent imageRef CGImageGetBytesPerRow imageRef colorSpaceInfo bitmapInfo if sourceImage.imageOrientation UIImageOrientationLeft CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationRight CGContextRotateCTM bitmap radians 90.. CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationRight CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap targetWidth 0 else if sourceImage.imageOrientation UIImageOrientationUp NOTHING else if sourceImage.imageOrientation.. UIImageOrientationUp NOTHING else if sourceImage.imageOrientation UIImageOrientationDown CGContextTranslateCTM bitmap targetWidth targetHeight CGContextRotateCTM bitmap radians 180. CGContextDrawImage bitmap CGRectMake 0 0 targetWidth targetHeight imageRef CGImageRef ref CGBitmapContextCreateImage bitmap UIImage newImage..

How to Rotate a UIImage 90 degrees?

http://stackoverflow.com/questions/1315251/how-to-rotate-a-uiimage-90-degrees

CGImageGetBitsPerComponent imageRef CGImageGetBytesPerRow imageRef colorSpaceInfo bitmapInfo if sourceImage.imageOrientation UIImageOrientationRight CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationLeft CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM.. CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationLeft CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap targetWidth 0 else if sourceImage.imageOrientation UIImageOrientationDown NOTHING else if sourceImage.imageOrientation.. bitmap targetWidth 0 else if sourceImage.imageOrientation UIImageOrientationDown NOTHING else if sourceImage.imageOrientation UIImageOrientationUp CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight CGContextDrawImage bitmap CGRectMake 0 0 targetWidth targetHeight imageRef CGImageRef ref CGBitmapContextCreateImage..

Resizing UIimages pulled from the Camera also ROTATES the UIimage?

http://stackoverflow.com/questions/1260249/resizing-uiimages-pulled-from-the-camera-also-rotates-the-uiimage

CGImageGetBytesPerRow imageRef colorSpaceInfo bitmapInfo if sourceImage.imageOrientation UIImageOrientationLeft CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationRight.. radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationRight CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap targetWidth 0 else if sourceImage.imageOrientation UIImageOrientationUp NOTHING.. else if sourceImage.imageOrientation UIImageOrientationDown CGContextTranslateCTM bitmap targetWidth targetHeight CGContextRotateCTM bitmap radians 180. CGContextDrawImage bitmap CGRectMake 0 0 targetWidth targetHeight imageRef CGImageRef ref CGBitmapContextCreateImage..

How to Rotate a UIImage 90 degrees?

http://stackoverflow.com/questions/1315251/how-to-rotate-a-uiimage-90-degrees

CGImageGetBytesPerRow imageRef colorSpaceInfo bitmapInfo if sourceImage.imageOrientation UIImageOrientationRight CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationLeft.. radians 90 CGContextTranslateCTM bitmap 0 targetHeight else if sourceImage.imageOrientation UIImageOrientationLeft CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap targetWidth 0 else if sourceImage.imageOrientation UIImageOrientationDown.. sourceImage.imageOrientation UIImageOrientationDown NOTHING else if sourceImage.imageOrientation UIImageOrientationUp CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 targetHeight CGContextDrawImage bitmap CGRectMake 0 0 targetWidth targetHeight..

Curve text on existing circle

http://stackoverflow.com/questions/3841642/curve-text-on-existing-circle

centerPoint.y radius sin degreesToRadians totalRotation CGContextSaveGState context CGContextTranslateCTM context x y CGContextRotateCTM context degreesToRadians totalRotation 90 CGContextShowTextAtPoint context 0 textSize.width 2 0 textSize.height 2 menuItemTextChar.. angle float letterAngle charSize.width perimeter 2 M_PI CGContextSaveGState context CGContextTranslateCTM context x y CGContextRotateCTM context angle 0.5 M_PI CGContextShowTextAtPoint context 0 0 c strlen c CGContextRestoreGState context angle letterAngle..

How to display an image on a MKOverlayView?

http://stackoverflow.com/questions/3891850/how-to-display-an-image-on-a-mkoverlayview

imageContext 0 height CGContextScaleCTM imageContext 1.0 1.0 if image.imageOrientation UIImageOrientationLeft CGContextRotateCTM imageContext M_PI 2 CGContextTranslateCTM imageContext 0 width else if image.imageOrientation UIImageOrientationRight CGContextRotateCTM.. imageContext M_PI 2 CGContextTranslateCTM imageContext 0 width else if image.imageOrientation UIImageOrientationRight CGContextRotateCTM imageContext M_PI 2 CGContextTranslateCTM imageContext height 0 else if image.imageOrientation UIImageOrientationDown CGContextTranslateCTM.. height 0 else if image.imageOrientation UIImageOrientationDown CGContextTranslateCTM imageContext width height CGContextRotateCTM imageContext M_PI Draw the image in the context CGContextDrawImage imageContext imageRect imageReference CGContextRestoreGState..

iPhone - CGImageCreateWithImageInRect rotating some camera roll pictures

http://stackoverflow.com/questions/5076617/iphone-cgimagecreatewithimageinrect-rotating-some-camera-roll-pictures

CGImageGetBytesPerRow imageRef colorSpaceInfo bitmapInfo if originalImage.imageOrientation UIImageOrientationLeft CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap 0 rect.size.height else if originalImage.imageOrientation UIImageOrientationRight.. 90 CGContextTranslateCTM bitmap 0 rect.size.height else if originalImage.imageOrientation UIImageOrientationRight CGContextRotateCTM bitmap radians 90 CGContextTranslateCTM bitmap rect.size.width 0 else if originalImage.imageOrientation UIImageOrientationUp.. if originalImage.imageOrientation UIImageOrientationDown CGContextTranslateCTM bitmap rect.size.width rect.size.height CGContextRotateCTM bitmap radians 180. CGContextDrawImage bitmap CGRectMake 0 0 rect.size.width rect.size.height imageRef CGImageRef ref CGBitmapContextCreateImage..

iPhone - Mirroring back a picture taken from the front camera

http://stackoverflow.com/questions/5505422/iphone-mirroring-back-a-picture-taken-from-the-front-camera

pickedImage.size UIGraphicsBeginImageContextWithOptions imageSize YES 1.0 GContextRef ctx UIGraphicsGetCurrentContext CGContextRotateCTM ctx 3.14 rotate by 180° CGContextScaleCTM ctx 1.0 1.0 flip vertical CGContextDrawImage ctx CGRectMake 0.0 0.0 imageSize.width..

Rotating an image context (CGContextRotateCTM) causing it to become blank. Why?

http://stackoverflow.com/questions/5983090/rotating-an-image-context-cgcontextrotatectm-causing-it-to-become-blank-why

an image context CGContextRotateCTM causing it to become blank. Why #define radians degrees degrees M_PI 180 UIImage rotate UIImage image CGSize size image.size.. size CGContextRef context UIGraphicsGetCurrentContext If this is commented out image is returned as it is. CGContextRotateCTM context radians 90 image drawInRect CGRectMake 0 0 size.width size.height UIImage newImage UIGraphicsGetImageFromCurrentImageContext..

UIImage Rotation custom degrees

http://stackoverflow.com/questions/917713/uiimage-rotation-custom-degrees

does in rotate CGSize size sizeOfImage UIGraphicsBeginImageContext size CGContextRef ctx UIGraphicsGetCurrentContext CGContextRotateCTM ctx angleInRadians CGContextDrawImage ctx CGRect size image UIImage image UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext..