CGPDFObject

An object representing content within a PDF document.

Overview

PDF supports several basic types of object: Boolean values, integer and real numbers, strings, names, arrays, dictionaries, and streams. Most of these are represented in Core Graphics by corresponding specific types. A CGPDFObject can represent any of these types. You use CGPDFObject functions to determine the type of the object, and retrieve the object value if it is of an expected type.

This object is not derived from CFType and therefore there are no functions for retaining and releasing it. CGPDFObject objects exist as constituent parts of a CGPDFDocument object, and are managed by their container.

Topics

Getting Object Types and Values

CGPDFObjectGetType

Returns the PDF type identifier of an object.

CGPDFObjectGetValue

Returns whether an object is of a given type and if it is, retrieves its value.

Data Types

CGPDFObjectRef

A type that contains information about a PDF object.

CGPDFBoolean

A PDF Boolean value.

CGPDFInteger

A PDF integer value.

CGPDFReal

A PDF real value.

Constants

CGPDFObjectType

Types of PDF object.

See Also

Opaque Types

CGBitmapContext

A type of CGContextRef that you can use for drawing bits to memory.

CGColor

A set of components that define a color, with a color space specifying how to interpret them.

CGColorConversionInfo

An object that describes how to convert between color spaces for use by other system services.

CGColorSpace

A profile that specifies how to interpret a color value for display.

CGContext

A Quartz 2D drawing destination.

CGDataConsumer

An abstraction for data-writing tasks that eliminates the need to manage a raw memory buffer.

CGDataProvider

An abstraction for data-reading tasks that eliminates the need to manage a raw memory buffer.

CGFont

A set of character glyphs and layout information for drawing text.

CGFunction

A general facility for defining and using callback functions.

CGGLContext

Deprecated. A type of CGContextRef for drawing OpenGL content.

CGGradient

A definition for a smooth transition between colors for drawing radial and axial gradient fills.

CGImage

A bitmap image or image mask.

CGLayer

An offscreen context for reusing content drawn with Core Graphics.

CGPath

Immutable and mutable types for graphics paths: mathematical descriptions of shapes or lines to be drawn in a graphics context.

CGPattern

A 2D pattern to be used for drawing graphics paths.

CGPDFArray

An array structure within a PDF document.

CGPDFContentStream

A representation of one or more content data streams in a PDF page.

CGPDFContext

A type of CGContextRef for drawing PDF content.

CGPDFDictionary

A dictionary structure within a PDF document.

CGPDFDocument

A document that contains PDF (Portable Document Format) drawing information.

CGPDFOperatorTable

A set of callback functions for operators used when scanning content in a PDF document.

CGPDFPage

A page in a PDF document.

CGPDFScanner

A parser object for handling content and operators in a PDF content stream.

CGPDFStream

A stream or sequence of data bytes in a PDF document.

CGPDFString

A text string in a PDF document.

CGPSConverter

An object that converts PostScript data to PDF data.

CGShading

A definition for a smooth transition between colors, controlled by a custom function you provide, for drawing radial and axial gradient fills.