ImageDecoder Class Reference

Decodes image data using Qt's built-in image loading capabilities. More...

#include <image_decoder.h>

Inheritance diagram for ImageDecoder:

Collaboration diagram for ImageDecoder:

Signals
void	error (const QString &message)
	Emitted if an error occurs during image loading or decoding.
void	imageInfo (int width, int height, bool has_alpha)
	Emitted after successful decoding, providing basic image information.
void	imageReady (const QImage &image)
	Emitted when the image has been successfully decoded.

Public Member Functions
QImage	Decode ()
	Attempts to decode the image data stored internally. Uses QImage::loadFromData() to perform the decoding. Emits imageReady() and imageInfo() on success, or error() on failure.
	ImageDecoder (const QByteArray &image_data, QObject *parent=nullptr)
	Constructs an ImageDecoder object.
	~ImageDecoder () override
	Destructor. Does not require special resource management like FFmpeg-based decoders.

Static Public Member Functions
static void	ReleaseResources ()
	Static method placeholder for resource release. In this Qt-based implementation, there are no specific resources to release globally.

Private Attributes
QByteArray	image_data_
	Stores the raw image data provided in the constructor.

Detailed Description

Decodes image data using Qt's built-in image loading capabilities.

This class takes raw image data (e.g., PNG, JPEG, etc.) as a QByteArray and uses QImage::loadFromData() to decode it. It operates synchronously within the calling thread and emits signals to report the decoded image, image information, or errors.

Constructor & Destructor Documentation

ImageDecoder()

ImageDecoder::ImageDecoder ( const QByteArray & image_data, QObject * parent = nullptr )

inlineexplicit

Constructs an ImageDecoder object.

Parameters

image_data	The raw image data to be decoded.
parent	Optional parent QObject.

~ImageDecoder()

ImageDecoder::~ImageDecoder ( )

inlineoverride

Destructor. Does not require special resource management like FFmpeg-based decoders.

Member Function Documentation

Decode()

QImage ImageDecoder::Decode

(

)

Attempts to decode the image data stored internally. Uses QImage::loadFromData() to perform the decoding. Emits imageReady() and imageInfo() on success, or error() on failure.

Returns

The decoded QImage on success, or a null QImage on failure.

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error

void ImageDecoder::error ( const QString & message )

signal

Emitted if an error occurs during image loading or decoding.

Parameters

message

A description of the error.

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imageInfo

void ImageDecoder::imageInfo ( int width, int height, bool has_alpha )

signal

Emitted after successful decoding, providing basic image information.

Parameters

width	The width of the decoded image in pixels.
height	The height of the decoded image in pixels.
has_alpha	True if the image format supports an alpha channel, false otherwise.

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imageReady

void ImageDecoder::imageReady ( const QImage & image )

signal

Emitted when the image has been successfully decoded.

Parameters

image

The decoded image as a QImage object. A copy is emitted.

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ReleaseResources()

static void ImageDecoder::ReleaseResources ( )

inlinestatic

Static method placeholder for resource release. In this Qt-based implementation, there are no specific resources to release globally.

Member Data Documentation

image_data_

QByteArray ImageDecoder::image_data_

private

Stores the raw image data provided in the constructor.

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The documentation for this class was generated from the following files:

• src/chat/files/image/decoder/image_decoder.h
• src/chat/files/image/decoder/image_decoder.cpp