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# A Solution For The "Graphical Editor" Problem

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```A solution for the "Graphical Editor" problem.

Problem description:
http://icpcres.ecs.baylor.edu/onlinejudge/external/102/10267.html

Author: Joana Matos Fonseca da Trindade
Date: 2008.03.12

```
/*
* Solution for the "Graphical Editor" problem.
* UVa ID: 10267
*/
#include

#define MAX 250
#define OFFSET 1
#define DOS_NAME 12

/* global image bounds */
int n, m;

/* fills a rectangle with the specified color */
int fillRectangle(int m_ini, int n_ini, int m_end, int n_end, char color, char pTable[][MAX+OFFSET]) {
int i, j;
for (i = n_ini; i <= n_end; i++) {
for (j = m_ini; j <= m_end; j++) {
pTable[i][j] = color;
}
}
return 0;
}

/* fills a region R with the specified color */
int fillRegion(int x, int y, char oldColor, char newColor, char pTable[][MAX+OFFSET]) {
/* (x,y) is in region R */
pTable[y][x] = newColor;

/* recursively check all 4 directions for neighbours of (x,y) with same color */
if ((pTable[y][x-1] == oldColor) && (x > OFFSET)) {
fillRegion(x-1, y, oldColor, newColor, pTable);
}
if ((pTable[y][x+1] == oldColor) && (x < m)) {
fillRegion(x+1, y, oldColor, newColor, pTable);
}
if ((pTable[y-1][x] == oldColor) && (y > OFFSET)) {
fillRegion(x, y-1, oldColor, newColor, pTable);
}
if ((pTable[y+1][x] == oldColor) && (y < n)) {
fillRegion(x, y+1, oldColor, newColor, pTable);
}
return 0;
}

/* outputs the image */
int printImage(int m, int n, char pTable[][MAX+OFFSET]) {
int i, j;
for (i = OFFSET; i < n+OFFSET; i++) {
for (j = OFFSET; j < m+OFFSET; j++ ) {
printf("%c", pTable[i][j]);
}
printf("\n");
}
return 0;
}

/* main */
int main (int argc, const char * argv[]) {
/* the image */
char image[MAX+OFFSET][MAX+OFFSET];

/* editor command */
char command;

/* coords */
int x1, x2, y1, y2, tmp;

/* colors */
char color, oldColor;

/* filename */
char filename[DOS_NAME+1];

while(scanf("%c", ,nd) != EOF) {
/* X, terminates the session */
if (command == 'X') {
return 0;
}
switch (command) {
/* create image */
case 'I' :
scanf("%d %d", &m, &n);
fillRectangle(1, 1, m, n, 'O', image);
break;

/* clear image */
case 'C' :
fillRectangle(1, 1, m, n, 'O', image);
break;

/* colors a pixel */
case 'L' :
scanf("%d %d %c", &x1, &y1, &color);
image[y1][x1] = color;
break;

/* draw vertical segment */
case 'V' :
scanf("%d %d %d %c", &x1, &y1, &y2, &color);
if (y2 >= y1)
fillRectangle(x1, y1, x1, y2, color, image);
else
fillRectangle(x1, y2, x1, y1, color, image);
break;

/* draw horizontal segment */
case 'H' :
scanf("%d %d %d %c", &x1, &x2, &y1, &color);
if (x2 >= x1)
fillRectangle(x1, y1, x2, y1, color, image);
else
fillRectangle(x2, y1, x1, y1, color, image);
break;

/* draw rectangle */
case 'K' :
scanf("%d %d %d %d %c", &x1, &y1, &x2, &y2, &color);
if (x1 >= x2) {
tmp = x1;
x1 = x2;
x2 = tmp;
}
if (y1 >= y2) {
tmp = y1;
y1 = y2;
y2 = tmp;
}
fillRectangle(x1, y1, x2, y2, color, image);
break;

/* fill */
case 'F' :
scanf("%d %d %c", &x1, &y1, &color);
oldColor = image[y1][x1];
if (oldColor != color) {
fillRegion(x1, y1, oldColor, color, image);
}
break;

/* fill */
case 'S' :
scanf("%s", &filename);
printf("%s\n", filename);
printImage(m, n, image);
break;

default:
break;
}
}

return 0;
}

``````
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