Build on our PBM image creator from (code shown below) to create a fully functional image editor (in C++), using 2D arrays to store our changes. To make it more interesting by switching to the Portable Gray Map standard. 8 bit PGM files have color values ranging from 0 (black) to 255 (white), with the values in-between being shades of gray. The header is very similar to PBM, and looks like this: P2 WIDTH HEIGHT 255 IMAGE_DATA The P2 tells image readers that it is a PGM file, and the 255 indicates the largest possible color value is 255. You will first prompt the user to enter a width, height, and initial color value to fill the image. You should then create a 2D array with those dimensions and initialize each cell with that color value. You will then use a loop to create a menu that repeatedly prompts the user to make one of the following choices: Fill in a pixel with a new color ◦ Prompt the user to enter a row and column value and a new color value. If the array has that row and column index AND the color value is between 0 – 255, change the color at the index. Otherwise, inform the user that it’s an invalid command. Fill in a line with a new color ◦ Prompt the user to enter a starting row and column value, a new color value, a length value, and a direction (left, right, up, or down, case sensitive). If all those values are valid, fill in each index in the line with those values in the 2D array (you can open up a program like Excel if you need help visualizing this) If the row, column, color, and/or direction are not correct, inform the user that it’s an invalid command. If the length is correct but would go outside the array (e.g. a length of 20 but the array only has 10 columns), fill in values up to the edge of the array and then stop. Do not cause an ArrayOutOfBounds error. Print the PGM file ◦ This should print out the contents of a valid PGM image. Quit

Build on our PBM image creator from (code shown below) to create a fully functional image editor (in C++), using 2D arrays to store our changes. To make it more interesting by switching to the Portable Gray Map standard. 8 bit PGM files have color values ranging from 0 (black) to 255 (white), with the values in-between being shades of gray. The header is very similar to PBM, and looks like this: P2 WIDTH HEIGHT 255 IMAGE_DATA The P2 tells image readers that it is a PGM file, and the 255 indicates the largest possible color value is 255. You will first prompt the user to enter a width, height, and initial color value to fill the image. You should then create a 2D array with those dimensions and initialize each cell with that color value. You will then use a loop to create a menu that repeatedly prompts the user to make one of the following choices: Fill in a pixel with a new color ◦ Prompt the user to enter a row and column value and a new color value. If the array has that row and column index AND the color value is between 0 – 255, change the color at the index. Otherwise, inform the user that it’s an invalid command. Fill in a line with a new color ◦ Prompt the user to enter a starting row and column value, a new color value, a length value, and a direction (left, right, up, or down, case sensitive). If all those values are valid, fill in each index in the line with those values in the 2D array (you can open up a program like Excel if you need help visualizing this) If the row, column, color, and/or direction are not correct, inform the user that it’s an invalid command. If the length is correct but would go outside the array (e.g. a length of 20 but the array only has 10 columns), fill in values up to the edge of the array and then stop. Do not cause an ArrayOutOfBounds error. Print the PGM file ◦ This should print out the contents of a valid PGM image. Quit

Programming Logic & Design Comprehensive

9th Edition

ISBN:9781337669405

Author:FARRELL

Publisher:FARRELL

Chapter6: Arrays

Section: Chapter Questions

Problem 5GZ

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Related questions

Question

WIDTH HEIGHT

255 IMAGE_DATA

The P2 tells image readers that it is a PGM file, and the 255 indicates the largest possible color value is 255.

You will first prompt the user to enter a width, height, and initial color value to fill the image. You should then create a 2D array with those dimensions and initialize each cell with that color value.

You will then use a loop to create a menu that repeatedly prompts the user to make one of the following choices:

Fill in a pixel with a new color

◦ Prompt the user to enter a row and column value and a new color value. If the array has that row and column index AND the color value is between 0 – 255, change the color at the index.

Otherwise, inform the user that it’s an invalid command.

Fill in a line with a new color

◦ Prompt the user to enter a starting row and column value, a new color value, a length value, and a direction (left, right, up, or down, case sensitive). If all those values are valid, fill in each index in the line with those values in the 2D array (you can open up a program like Excel if you need help visualizing this) If the row, column, color, and/or direction are not correct, inform the user that it’s an invalid command.

If the length is correct but would go outside the array (e.g. a length of 20 but the array only has 10 columns), fill in values up to the edge of the array and then stop. Do not cause an ArrayOutOfBounds error.

Print the PGM file

◦ This should print out the contents of a valid PGM image.

Quit

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78172754557 78 79 88 81 82 88
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નન
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}
{
}
for (int j = 0; j < height_width; j++)
{
}
for (int i = 0; i < size_square; i++)
{
cout << color_border;
}cout << endl;
}
for (int j = 0; j < size_border; j++)
{
}
for (int k = 0; k < size_square; k++ )
cout << color_square;
(int j = 0; j < size_border; j++)
{
}
for
cout << color_border;
{
cout << color_border;
}cout << endl;
for (int i = 0; i < size_border; i++)
{
for (int j = 0; j < height_width; j++)|
{
cout << color_border;
}cout << endl;
cout << endl;
return 0;

1
include <iostream>
2 using namespace std;
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WNH NNNNNNNNNH
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int main()
{
int size_square;
int size_border;
int color_square;
int color_border;
do{
cout << "Enter the size of the square:
cin >> size_square;
if (size_square < 0) {
}
cout << "Invalid input!" << endl;
}
while (size_square < 0);
do{
cout << "Enter the size of the border:
cin >> size_border;
if (size_border < 0) {
}
cout << "Invalid input!" << endl;
}
while (size_border < 0);
do{
cout << "Enter the color of the square:
cin >> color_square;
if (color_square < ℗ || color_square > 1){
"Invalid input!" << endl;
}
cout
}
while (color_square < ℗ || color_square > 1);
do{
cout
cin >> color_border;
if (color_border < 0 || color_border > 1){
"Invalid input!" << endl;
}
"Enter the color of the border:
cout
}
while (color_border < ℗ || color_border > 1);
cout << "PBM File Contents:" << endl;
cout
"P1" << endl;
int total_size;
total_size = size_square + 2
int height_width;
height_width = total_size;
size_border;
cout << total_size <<
for (int i = 0; i < size_border; i++)
<< total_size << endl;

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