Basic graphics context methods

A brief summary of the main methods that apply to graphics contexts follows. There are convenience methods for setting individual attributes of a graphics context. These methods are described later in this section.

createGC:values:

Create and initialize a graphics context.

changeGC:values:

Change a group of graphics context attributes.

copyGC:dest:

Copy a group of graphics context attributes to another graphics context.

getGCValues:valuesReturn:

Retrieve a group of graphics context attributes from a graphics context.

freeGC

Free the resources allocated to the graphics context.