Arrays, .ppm images manipulation
Hi there again! I've been working on an assignment since it was given to me on Thursday, that involves making a C++ console application that manipulates .ppm images.The program is supposed to rotate the image 90,180,and 270 degrees clockwise and counterclockwise, flip the image horizontally and vertically, decompose the image in red, green and blue components in separated files, zoom in and zoom out the image by 2x and 4x, and convert the image in gray scale. Although this project is from Computer Programing 2, and not for Computer Programing 1(in which I am), I'm sincere... I have no freaking idea how to deal with this. I already (with help from my professor in class, of course), managed to rotate the image,yes, from Thursday to today, this is the only things that I have managed to do. I'm really worried because this is supposed to hand over this Thursday, April 9, 2009. I'm not pretending that someone of you will make all the program for me, but, if someone could point me and teach me how to deal with this, I think I will be capable of making the program, or a little more than I already have. This is what i have for now:
#include<iostream>
#include<fstream>
#define s 256
void read(int data[s][s*3],int & h,int & w,int & c);
void read2(int data[s][s*3],int & h,int & w,int & c);
void save(int data[s][s*3],int & h,int & w,int & c);
void rotate90(int data[s][s*3],int h,int w,int c);
/* The image that I'm using, by orders of the assigment
is 'snail.ppm', which it is at
[url]http://orion.math.iastate.edu/burkardt/data/ppm/ppm.html[/url]
at the bottom of the page. I'm required to make a menu
for the user selection of the type of modification
to the image that will be made.*/
using namespace std;
void main()
{
int data[s][s*3],heigh,witdh,color,select,select2;
do
{
cout<<"Choose an option: "<<endl;
cout<<"\n1)Rotate Clockwise"<<endl;
cout<<"2)Rotate Counter-Clockwise"<<endl;
cout<<"3)Decompose"<<endl;
cout<<"4)Zoom in"<<endl;
cout<<"5)Zoom out"<<endl;
cout<<"6)Convert into Grayscale"<<endl;
cout<<"7)Exit"<<endl;
cout<<"\nGive your selection:\t";
cin>>select;
switch(select)
{
case 1:
do{
cout<<"\nRotate:"<<endl;
cout<<"1)90 degrees"<<endl;
cout<<"2)180 degrees"<<endl;
cout<<"3)270 degrees"<<endl;
cout<<"Give your selection: ";
cin>>select2;
}while((select2<1)||(select2>3));
switch(select2)
{
case 1:
read(data,heigh,witdh,color);
rotate90(data,heigh,witdh,color);
cout<<"\nYour image was sucessfully rotated.\n"<<endl;
break;
case 2:
read(data,heigh,witdh,color);
for(int i=0;i<2;i++)
{
rotate90(data,heigh,witdh,color);
read2(data,heigh,witdh,color);
}
cout<<"\nYour image was sucessfully rotated.\n"<<endl;
break;
case 3:
read(data,heigh,witdh,color);
for(int i=0;i<3;i++)
{
rotate90(data,heigh,witdh,color);
read2(data,heigh,witdh,color);
}
cout<<"\nYour image was sucessfully rotated.\n"<<endl;
break;
}
case 2:
do{
cout<<"\nRotate:"<<endl;
cout<<"1)90 degrees"<<endl;
cout<<"2)180 degrees"<<endl;
cout<<"3)270 degrees"<<endl;
cout<<"\nGive your selection: ";
cin>>select2;
}while((select2<1)||(select2>3));
switch(select2)
{
case 1:
read(data,heigh,witdh,color);
for(int i=0;i<3;i++)
{
rotate90(data,heigh,witdh,color);
read2(data,heigh,witdh,color);
}
cout<<"\nYour image was sucessfully rotated.\n"<<endl;
break;
case 2:
read(data,heigh,witdh,color);
for(int i=0;i<2;i++)
{
rotate90(data,heigh,witdh,color);
read2(data,heigh,witdh,color);
}
cout<<"\nYour image was sucessfully rotated.\n"<<endl;
break;
case 3:
read(data,heigh,witdh,color);
rotate90(data,heigh,witdh,color);
cout<<"\nYour image was sucessfully rotated.\n"<<endl;
break;
}
}
}while(select!=7);
}
void read(int data[s][s*3],int & h,int & w,int & c)
{
char buffer[s];
ifstream input;
input.open("C:\\Users\\AK's\\Downloads\\snail.ppm",ios::in);
if(input==NULL)
{
cout<<"Cannot open file"<<endl;
}
input.getline(buffer,s*3);
input.getline(buffer,s*3);
input>>w>>h>>c;
for(int i=0;i<h;i++)
{
for(int j=0;j<w*3;j++)
{
input>>data[i][j];
}
}
input.close();
}
void read2(int data[s][s*3],int & h,int & w,int & c)
{
char buffer[s];
ifstream input;
input.open("C:\\Users\\AK's\\Downloads\\snail2.ppm",ios::in);
if(input==NULL)
{
cout<<"Cannot open file"<<endl;
}
input.getline(buffer,s*3);
input.getline(buffer,s*3);
input>>w>>h>>c;
for(int i=0;i<h;i++)
{
for(int j=0;j<w*3;j++)
{
input>>data[i][j];
}
}
input.close();
}
void rotate90(int data[s][s*3],int h,int w,int c)
{
ofstream output;
output.open("C:\\Users\\AK's\\Downloads\\snail2.ppm",ios::out);
output<<"P3"<<endl;
output<<"#Title"<<endl;
output<<w<<" "<<h<<endl;
output<<c<<endl;
for(int i=0;i<h;i++)
{
output<<endl;
for(int j=0;j<w;j++)
{
output<<data [w-j-1][i*3]<<" "<<data[w-j-1][i*3+1]<<" "<<data[w-j-1][i*3+2]<<" ";
}
}
}
I will be very very grateful if someone could lend me a hand with this... Thank You!
Last edited by LuciWiz : 08-Apr-2009 at 03:24.
Reason: Please insert your C++ code between [cpp] & [/cpp] tags
|
08-Apr-2009, 03:08
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