Class Frame in namespace setasign\SetaPDF2\Core\Image\Gif in SetaPDF v2 API Reference

Index

\setasign\SetaPDF2
1. Core
  1. Image
    1. Gif
    2. Gif
      1. Block
      2. Filter
      3. Frame
      4. Reader
      5. Reader

setasign\SetaPDF2\Core\Image\Gif

Frame Class representing a GIF frame.

File: /SetaPDF v2/Core/Image/Gif/Frame.php
Old class name (alias): \SetaPDF_Core_Image_Gif_Frame

Class hierarchy

Frame

Summary

Static Properties

$cache

static public bool Frame::$cache = true

A static flag to enable or disable the caching of frames.

Properties

$_delayTime

private int Frame::$_delayTime

The time to wait before drawing the next frame.

$_imageDescriptor

private Block\ImageDescriptor[] Frame::$_imageDescriptor

The associated image descriptors.

$_previousFrame

private Frame Frame::$_previousFrame

The previous frame that shall be rendered underneath the current one.

$_reader

private Reader Frame::$_reader

The GIF reader.

$_stream

private ?string Frame::$_stream

The cached image stream.

$_transparencyMask

private ?string Frame::$_transparencyMask

The cached transparent pixels, if there are no pixels left, the value will change to null.

$_transparencyPixelCount

private ?int Frame::$_transparencyPixelCount

The cached number of transparent pixels, if there are no pixels left, the value will change to null.

$_transparentIndices

private array Frame::$_transparentIndices

The transparent indices.

Methods

__construct()

public Frame::__construct (

Reader $reader,
Block\ImageDescriptor $image,
array $transparentIndices,
?Frame $previousFrame = null,
int $delayTime = 0

)

The constructor.

Parameters

$reader : Reader
$image : Block\ImageDescriptor
$transparentIndices : array
$previousFrame : ?Frame
$delayTime : int

_applyPixels()

private Frame::_applyPixels (

string &$stream,
?string &$transparencyMask,
?int &$transparencyPixelCount,
int[] $pixels,
string[] $colorTable

): void

Applies all the pixel changes onto the stream.

Parameters

$stream : string
$transparencyMask : ?string
$transparencyPixelCount : ?int
$pixels : int[]
$colorTable : string[]

_createMaskStream()

private Frame::_createMaskStream (

string $transparencyMask

): \setasign\SetaPDF2\Core\Type\PdfStream

Creates a SMask for the current image.

Parameters

$transparencyMask : string

_ensureStream()

private Frame::_ensureStream (

?string &$stream,
?string &$transparencyMask,
?int &$transparencyPixelCount = null

): void

Ensures that the stream is the read stream.

Parameters

$stream : ?string
$transparencyMask : ?string
$transparencyPixelCount : ?int

Exceptions

Throws \setasign\SetaPDF2\Core\Image\Exception

_getColorTable()

private Frame::_getColorTable (

void

): ?array

Gets the color table.

Exceptions

Throws \setasign\SetaPDF2\Core\Image\Exception

_readStream()

private Frame::_readStream (

?string &$stream,
?string &$transparencyMask,
?int &$transparencyPixelCount

): void

Reads the current stream and renders it onto the image stream.

Parameters

$stream : ?string
$transparencyMask : ?string
$transparencyPixelCount : ?int

Exceptions

Throws \setasign\SetaPDF2\Core\Image\Exception

getDelayTime()

public Frame::getDelayTime (

void

): int

Get the time to wait before drawing the next frame.

toXObject()

public Frame::toXObject (

\setasign\SetaPDF2\Core\Document $document

): \setasign\SetaPDF2\Core\XObject\Image

Creates a XObject using the stored frame data.

Parameters

$document : \setasign\SetaPDF2\Core\Document

Exceptions

Throws \setasign\SetaPDF2\Core\Image\Exception