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Document Revision History

This table describes the changes to CGContext Reference.

DateNotes
2008-04-08Made a minor typographical change.
2007-07-17Updated for Mac OS X v10.5.
 

All instances of the float data type were changed to the CGFloat data type.

 

Added the Porter-Duff blend modes to “Blend Modes”.

 

Added CGContextDrawLinearGradient, CGContextDrawRadialGradient, CGContextDrawTiledImage, CGContextShowGlyphsAtPositions, and CGContextBeginTransparencyLayerWithRect.

 

Modified the description of the auxiliaryInfo parameter in CGContextBeginTransparencyLayer.

 

Added a performance tip to CGContextBeginTransparencyLayer.

 

Clarified the definition of “inside” for CGContextPathContainsPoint.

2006-01-10 Added information to the discussion for blend mode constants.
 

Improved wording concerning text clipping in “Text Drawing Modes.”

2005-11-09Revised information about text space and user space.
2005-04-29 Updated for Mac OS X v10.4.
 

Added the functions CGContextSetBlendMode, CGContextAddEllipseInRect, CGContextReplacePathWithStrokedPath, CGContextPathContainsPoint, CGContextFillEllipseInRect, CGContextStrokeEllipseInRect, CGContextStrokeLineSegments, CGContextClipToMask, CGContextSetAllowsAntialiasing, CGContextGetUserSpaceToDeviceSpaceTransform, CGContextConvertPointToDeviceSpace, CGContextConvertPointToUserSpace, CGContextConvertSizeToDeviceSpace, CGContextConvertSizeToUserSpace, CGContextConvertRectToDeviceSpace, and CGContextConvertRectToUserSpace.

 

Added constants for “Blend Modes”.

 

Changed the description of what to pass for the components parameter for the functions CGContextSetFillPattern and CGContextSetStrokePattern.

2004-08-31

Updated graphics context information and added cross references to conceptual documentation.

2004-02-26

First version of this document. An earlier version of this information appeared in Quartz 2D Reference.




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