Image decoder specialization for PNG images. More...

#include <png_image.h>

Inheritance diagram for esphome::online_image::PngDecoder:

Public Member Functions
	PngDecoder (OnlineImage *image)
	Construct a new PNG Decoder object.

	~PngDecoder () override

int	prepare (size_t download_size) override

int HOT	decode (uint8_t *buffer, size_t size) override

Public Member Functions inherited from esphome::online_image::ImageDecoder
	ImageDecoder (OnlineImage *image)
	Construct a new Image Decoder object.

virtual	~ImageDecoder ()=default

bool	set_size (int width, int height)
	Request the image to be resized once the actual dimensions are known.

void	draw (int x, int y, int w, int h, const Color &color)
	Fill a rectangle on the display_buffer using the defined color.

bool	is_finished () const

Protected Attributes
RAMAllocator< pngle_t >	allocator_

pngle_t *	pngle_

Protected Attributes inherited from esphome::online_image::ImageDecoder
OnlineImage *	image_

size_t	download_size_ = 1

size_t	decoded_bytes_ = 0

double	x_scale_ = 1.0

double	y_scale_ = 1.0

Detailed Description

Image decoder specialization for PNG images.

Definition at line 15 of file png_image.h.

Constructor & Destructor Documentation

◆ PngDecoder()

esphome::online_image::PngDecoder::PngDecoder ( OnlineImage * image )

Construct a new PNG Decoder object.

Parameters

display The image to decode the stream into.

Definition at line 43 of file png_image.cpp.

◆ ~PngDecoder()

esphome::online_image::PngDecoder::~PngDecoder ( )

override

Definition at line 56 of file png_image.cpp.

Member Function Documentation

◆ decode()

int HOT esphome::online_image::PngDecoder::decode	(	uint8_t *	buffer,
		size_t	size )

overridevirtual

Implements esphome::online_image::ImageDecoder.

Definition at line 75 of file png_image.cpp.

◆ prepare()

int esphome::online_image::PngDecoder::prepare ( size_t download_size )

overridevirtual

Reimplemented from esphome::online_image::ImageDecoder.

Definition at line 63 of file png_image.cpp.

Field Documentation

◆ allocator_

RAMAllocator<pngle_t> esphome::online_image::PngDecoder::allocator_

protected

Definition at line 29 of file png_image.h.

◆ pngle_

pngle_t* esphome::online_image::PngDecoder::pngle_