A subclass of PNG with more member functions for modifying the image. More...

#include "image.h"

Inheritance diagram for Image:

Collaboration diagram for Image:

Public Member Functions
void	flipleft ()
	Flips the image about a vertical line through its center by swapping pixels. More...

void	adjustbrightness (int r, int g, int b)
	Adds to the red, green, and blue parts of each pixel in the image. More...

void	invertcolors ()
	Makes each RGB component of each pixel iequal to 255 minus its original value. More...

Public Member Functions inherited from PNG
	PNG ()
	Creates a default PNG image (that is, a 1x1 opaque white image). More...

	PNG (size_t width, size_t height)
	Creates a default PNG image of the desired dimensions (that is, a width x height opaque white image). More...

	PNG (string const &file_name)
	Creates a PNG image by reading a file in from disk. More...

	PNG (PNG const &other)
	Copy constructor: creates a new PNG image that is a copy of another. More...

	~PNG ()
	Destructor: frees all memory associated with a given PNG object. More...

PNG const &	operator= (PNG const &other)
	Assignment operator for setting two PNGs equal to one another. More...

bool	operator== (PNG const &other) const
	Equality operator: checks if two images are the same. More...

bool	operator!= (PNG const &other) const
	Inequality operator: checks if two images are different. More...

RGBAPixel *	operator() (size_t x, size_t y)
	Non-const pixel access operator. More...

RGBAPixel const *	operator() (size_t x, size_t y) const
	Const pixel access operator. More...

bool	readFromFile (string const &file_name)
	Reads in a PNG image from a file. More...

bool	writeToFile (string const &file_name)
	Writes a PNG image to a file. More...

size_t	width () const
	Gets the width of this image. More...

size_t	height () const
	Gets the height of this image. More...

void	resize (size_t width, size_t height)
	Resizes the image to the given coordinates. More...

Detailed Description

A subclass of PNG with more member functions for modifying the image.

Member Function Documentation

void Image::flipleft ( )

Flips the image about a vertical line through its center by swapping pixels.

Note: You must implement this function with space efficiency. That is, you should not declare a new empty Image into which you copy pixels. Rather, you should just use a temporary variable to swap pixels within the original Image.

void Image::adjustbrightness	(	int	r,
		int	g,
		int	b
	)

Adds to the red, green, and blue parts of each pixel in the image.

Parameters

r	the amount to adjust the red value by
g	the amount to adjust the green value by
b	the amount to adjust the blue value by

Note: Overflow is prevented: if the result would be less than 0, it is 0. If the result would be greater than 255, it is 255.

void Image::invertcolors ( )

Makes each RGB component of each pixel iequal to 255 minus its original value.

That is, the colors become the opposite of what they were, makeing a color-opposite of the original image.

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

Public Member Functions

Detailed Description

Member Function Documentation