CGPDFContentStream

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

Overview

A CGPDFContentStreamRef object represents one or more PDF content streams for a page and their associated resource dictionaries. A PDF content stream is a sequential set of instructions that specifies how to paint items on a PDF page. A resource dictionary contains information needed by the content stream in order to decode the sequential instructions of the content stream.

CGPDFContentStreamRef functions can retrieve both the content streams and the resource dictionaries associated with a PDF page.

This type is not derived from CFTypeRef and therefore there are no functions for retaining and releasing it. CGPDFContentStreamRef objects exist only as constituent parts of a CGPDFDocumentRef object, and they are managed by their container.

Topics

Creating a PDF Content Stream Object

CGPDFContentStreamCreateWithPage

Creates a content stream object from a PDF page object.

CGPDFContentStreamCreateWithStream

Creates a PDF content stream object from an existing PDF content stream object.

Getting Data from a PDF Content Stream Object

CGPDFContentStreamGetStreams

Gets the array of PDF content streams contained in a PDF content stream object.

CGPDFContentStreamGetResource

Gets the specified resource from a PDF content stream object.

Retaining and Releasing a PDF Content Stream Object

CGPDFContentStreamRetain

Increments the retain count of a PDF content stream object.

CGPDFContentStreamRelease

Decrements the retain count of a PDF content stream object.

Data Types

CGPDFContentStreamRef

An opaque type that provides access to the data that describes the appearance of a PDF page.

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.

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.

CGPDFObject

An object representing content within a PDF document.

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.