2014/10/15 下午 10:05:00

iphone Programming Glossary: cgcontextcliptorect

iphone MPMoviePlayerViewController CGContext Errors

http://stackoverflow.com/questions/13203336/iphone-mpmovieplayerviewcontroller-cgcontext-errors

alloc initWithContentURL url the following errors occur Error CGContextSaveGState invalid context 0x0 Error CGContextClipToRect invalid context 0x0 Error CGContextTranslateCTM invalid context 0x0 Error CGContextDrawShading invalid context 0x0 Error..

MPMoviePlayerViewController Generating lots of errors

http://stackoverflow.com/questions/14224476/mpmovieplayerviewcontroller-generating-lots-of-errors

30320 Error CGContextSaveGState invalid context 0x0 Jan 8 21 19 28 rezas macbook.home MoviePlayer 30320 Error CGContextClipToRect invalid context 0x0 Jan 8 21 19 28 rezas macbook.home MoviePlayer 30320 Error CGContextTranslateCTM invalid context 0x0..

Cropping an image in iOS using OpenCV face detection

http://stackoverflow.com/questions/14756505/cropping-an-image-in-ios-using-opencv-face-detection

img.size.height clip to the bounds of the image context not strictly necessary as it will get clipped anyway CGContextClipToRect context CGRectMake 0 0 rect.size.width rect.size.height draw image img drawInRect drawRect grab image UIImage subImage UIGraphicsGetImageFromCurrentImageContext..

Is there a way to programatically restore my iphone to factory settings?

http://stackoverflow.com/questions/15203001/is-there-a-way-to-programatically-restore-my-iphone-to-factory-settings

Multiple Clipped Rects to Create Collage in Core Graphics

http://stackoverflow.com/questions/2234668/multiple-clipped-rects-to-create-collage-in-core-graphics

a rect with the size we want to crop the image to CGRect clippedRect CGRectMake i columnWidth 0 columnWidth size CGContextClipToRect currentContext clippedRect create a rect equivalent to the full size of the image CGRect drawRect CGRectMake 0 0 size size.. image is drawing upside down too. iphone objective c drawing core graphics clipping share improve this question CGContextClipToRect intersects the current clipping rectangle with the argument provided. So the second time you call it you are effectively..

Using CGContext to display a sprite sheet iPhone

http://stackoverflow.com/questions/2863626/using-cgcontext-to-display-a-sprite-sheet-iphone

I'm just not sure how to use the CGContext stuff along with the the coordinates to return an UIImage. I was looking to CGContextClipToRect because I think that is the way to do it but I just can't seem to get it to work. Something like this CGSize size CGSizeMake.. can't seem to get it to work. Something like this CGSize size CGSizeMake xSize ySize UIGraphicsBeginImageContext size CGContextClipToRect spriteSheet.size imageRect spriteSheet drawAtPoint CGPointMake xPos yPos UIImage newImage UIGraphicsGetImageFromCurrentImageContext..

CGContextDrawPDFPage taking up large amounts of memory

http://stackoverflow.com/questions/2975240/cgcontextdrawpdfpage-taking-up-large-amounts-of-memory

0 YES CGRect pageRect CGPDFPageGetBoxRect m_page box Start the drawing CGContextSaveGState g Clip to our bounding box CGContextClipToRect g pageRect Now we have to flip the origin to top left instead of bottom left First flip y axix CGContextScaleCTM g 1 1 Second..

How to customize the background/border colors of a grouped table view cell?

http://stackoverflow.com/questions/400965/how-to-customize-the-background-border-colors-of-a-grouped-table-view-cell

rect.size.height CGContextAddLineToPoint c rect.size.width rect.size.height 10.0f CGContextStrokePath c CGContextClipToRect c CGRectMake 0.0f 0.0f rect.size.width rect.size.height 10.0f else if position CustomCellBackgroundViewPositionBottom CGContextFillRect.. c CGContextMoveToPoint c rect.size.width 0.0f CGContextAddLineToPoint c rect.size.width 10.0f CGContextStrokePath c CGContextClipToRect c CGRectMake 0.0f 10.0f rect.size.width rect.size.height else if position CustomCellBackgroundViewPositionMiddle CGContextFillRect..

How can I use CGContextDrawTiledImage to tile an image?

http://stackoverflow.com/questions/679925/how-can-i-use-cgcontextdrawtiledimage-to-tile-an-image

CGPointMake 160 240 imageRect.size CGSizeMake 320.0 480.0 CGContextRef uiContext UIGraphicsGetCurrentContext CGContextClipToRect uiContext CGRectMake 0.0 0.0 rect.size.width rect.size.height CGContextDrawTiledImage uiContext imageRect image iphone..

UIView scaling during animation

http://stackoverflow.com/questions/818207/uiview-scaling-during-animation

custom UIView to show a tiled image. void drawRect CGRect rect ... CGContextRef context UIGraphicsGetCurrentContext CGContextClipToRect context CGRectMake 0.0 0.0 rect.size.width rect.size.height CGContextDrawTiledImage context imageRect imageRef ... Now..

Crop and Scale CGContext - iOS

http://stackoverflow.com/questions/8501149/crop-and-scale-cgcontext-ios

CGColorSpaceRelease colorSpace return Now what I want to do is to crop and then scale this CGContext I tried with CGContextClipToRect context CGRectMake 0 0 360 640 and CGContextScaleCTM context 2 2 but not successful. Can anyone gives me some more advices..

NSTimer on device is slower than in simulator

http://stackoverflow.com/questions/915410/nstimer-on-device-is-slower-than-in-simulator

I used NSTimer scheduledTimerWithTimeInterval 0.01 for game loop. The game consists drawscreen function in which I use CGContextClipToRect to clip the large images for animation. But the speed 0.01 seconds is working in simulator only not on device. How can I..