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Questions tagged core-graphics

49 questions

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43
votes
1
answers

The relationship between CoreGraphics, UIViews and CALayers

ios core-animation core-graphics
asked 2013-07-18T05:54:07.950
10
votes
1
answers

NSRect vs CGRect: y-axis inversion

macos cocoa core-graphics
asked 2013-06-12T04:38:33.907
113
votes
6
answers

iOS 7 style Blur view

ios objective-c core-graphics
asked 2013-06-11T04:45:16.010
75
votes
3
answers

Draw segments from a circle or donut

ios core-animation core-graphics
asked 2013-04-07T18:33:10.767
8
votes
2
answers

Collection element of type 'CGSize' is not an Objective-C object

objective-c core-graphics nsdictionary cgsize
asked 2013-03-18T21:39:40.247
29
votes
5
answers

Cut Out Shape with Animation

ios uikit core-animation core-graphics mask
asked 2013-03-13T02:04:08.320
9
votes
4
answers

Painfully slow software vectors, particularly CoreGraphics vs. OpenGL

ios opengl-es core-graphics vector-graphics openvg
asked 2013-03-12T19:25:45.913
28
votes
3
answers

CGRect syntax I haven't seen before

ios core-graphics
asked 2013-02-06T07:28:55.907
13
votes
1
answers

IOS : Animate transformation from a line to a bezier curve

ios core-graphics bezier uibezierpath nsbezierpath
asked 2013-01-28T21:00:09.567
9
votes
2
answers

CGPath with outline

ios objective-c core-graphics quartz-graphics cgpath
asked 2013-01-16T21:21:54.077
67
votes
2
answers

Detecting CGAssociateMouseAndMouseCursorPosition

macos core-graphics mouseevent quartz-graphics
asked 2013-01-11T23:40:33.327
14
votes
4
answers

Rotate CGPath without changing its position

iphone objective-c ios core-graphics
asked 2012-12-06T06:48:57.173
16
votes
3
answers

Core Image CIColorControls brightness filter creates wrong effect. How do I change my image's luminance?

ios ios5 graphics core-graphics core-image
asked 2012-11-25T00:56:52.880
23
votes
6
answers

What is the most memory-efficient way of downscaling images on iOS?

ios memory-management core-graphics javax.imageio cgimage
asked 2012-11-06T12:39:15.987
21
votes
5
answers

Fast blur on iOS

objective-c image image-processing uiimageview core-graphics
asked 2012-09-04T20:37:54.810
23
votes
3
answers

Get path to trace out a character in an iOS UIFont

iphone ios core-graphics uifont cgpath
asked 2012-06-23T19:06:15.053
8
votes
2
answers

iPhone iOS how to flip/reflect any UIView in - place?

iphone objective-c ios uiview core-graphics
asked 2012-05-21T12:38:11.997
10
votes
5
answers

Mac OS X: Drawing into an offscreen NSGraphicsContext using CGContextRef C functions has no effect. Why?

objective-c macos cocoa core-graphics quartz-2d
asked 2012-05-16T22:19:09.293
11
votes
4
answers

iOS Performance Tuning: fastest way to get pixel color for large images

ios performance uiimage core-graphics
asked 2012-05-01T22:31:38.000
8
votes
3
answers

iPhone iOS how to create graphics effects like drop shadow, etc? What effects are built-into iOS?

iphone objective-c ios core-graphics quartz-graphics
asked 2012-04-30T12:31:12.927
9
votes
1
answers

-[CALayer setNeedsDisplayInRect:] causes the whole layer to be redrawn

ios cocoa-touch core-graphics calayer
asked 2012-03-21T16:58:42.340
27
votes
1
answers

Getting NSImage from CGImageRef

macos core-graphics nsimage cgimageref
asked 2012-02-01T15:21:01.347
10
votes
2
answers

Drawing MKMapView Overlay like Google Maps Directions

ios core-graphics mkmapview mapkit drawrect
asked 2011-12-30T00:49:22.343
9
votes
2
answers

Returning an autorelease'd CFTypeRef with ARC

objective-c ios core-graphics automatic-ref-counting core-foundation
asked 2011-10-21T22:28:18.597
10
votes
3
answers

How do you generate an RGBA image in Core Graphics?

iphone objective-c opengl-es core-graphics
asked 2011-07-28T15:52:18.097
25
votes
3
answers

Images vs. Core Graphics

iphone core-graphics
asked 2011-06-29T12:02:46.017
13
votes
3
answers

How to paint a good RGB color map?

iphone objective-c ios core-graphics
asked 2011-06-08T19:13:11.430
10
votes
2
answers

Why is the join not rounded when the line doubles back on itself?

ios core-graphics
asked 2011-05-03T14:34:06.987
18
votes
2
answers

What's the best approach to draw lines between views?

iphone cocoa-touch core-animation core-graphics calayer
asked 2011-05-01T10:40:27.260
16
votes
3
answers

What is a graphic context? (iOS)

ios core-graphics uigraphicscontext uigraphicsimagerenderer
asked 2011-01-23T18:32:44.050
9
votes
1
answers

Why won't Helvetica Neue Bold glyphs draw as a normal subpath in NSBezierPath?

objective-c cocoa fonts core-graphics typography
asked 2011-01-20T01:55:50.643
44
votes
10
answers

Is there a way to make drawRect work right NOW?

ios iphone cocoa core-graphics runloop
asked 2011-01-19T19:32:47.890
38
votes
3
answers

Applying a Gradient to CAShapeLayer

iphone core-graphics quartz-graphics gradient cashapelayer
asked 2011-01-19T10:08:52.100
30
votes
3
answers

CoreGraphics for retina display

iphone core-graphics retina-display cg
asked 2011-01-16T19:13:38.100
10
votes
6
answers

Stop drawing of CATiledLayer

objective-c memory-management core-animation core-graphics
asked 2010-10-06T10:23:45.913
10
votes
3
answers

How can i convert UIFont to CGFontRef?I causes warning and not working

iphone cocoa-touch core-graphics
asked 2010-08-23T08:21:22.447
9
votes
2
answers

Draw dotted lines using Quartz on iPhone

ios swift iphone drawing core-graphics
asked 2010-06-28T13:42:07.917
114
votes
4
answers

How to store CGRect values in NSMutableArray?

iphone nsmutablearray core-graphics
asked 2010-05-29T07:17:28.707
9
votes
11
answers

Allow horizontal scrolling only in the core-plot barchart?

iphone cocoa-touch core-graphics core-plot bar-chart
asked 2009-12-12T06:18:40.430
13
votes
5
answers

CATiledLayer blanking tiles before drawing contents

iphone core-graphics quartz-graphics catiledlayer
asked 2009-11-10T19:40:34.007
9
votes
9
answers

Get size of image without loading in to memory

iphone cocoa cocoa-touch uikit core-graphics
asked 2009-10-11T18:02:35.987
93
votes
7
answers

NSLog with CGPoint data

iphone cocoa cocoa-touch core-graphics nslog
asked 2009-09-25T10:22:14.813
11
votes
2
answers

How to flip coordinates when drawing in context?

iphone cocoa-touch uikit core-graphics
asked 2009-07-17T20:43:03.897
22
votes
3
answers

How to create a UIImage from the current graphics context?

ios uiimage core-graphics quartz-graphics
asked 2009-07-11T04:26:16.287
121
votes
15
answers

How do I make UILabel display outlined text?

ios objective-c iphone cocoa-touch core-graphics
asked 2009-07-09T10:47:20.287
15
votes
5
answers

Is it possible to alter the letter-spacing/kerning of a font with Cocoa Touch?

iphone objective-c cocoa-touch core-graphics quartz-graphics
asked 2009-06-30T11:58:10.703
16
votes
2
answers

CGContext - is there a way to reset the current context

iphone cocoa-touch core-graphics
asked 2009-02-04T01:46:22.720
186
votes
18
answers

CGContextDrawImage draws image upside down when passed UIImage.CGImage

ios cocoa-touch core-graphics cgcontextdrawimage
asked 2009-02-03T10:23:11.117
205
votes
11
answers

How to get pixel data from a UIImage (Cocoa Touch) or CGImage (Core Graphics)?

cocoa cocoa-touch core-graphics
asked 2009-01-15T19:30:26.853