Turbo C Graphics - getbkcolor function

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getbkcolor function is used to get the current background color. setbkcolor function is used to set the background color in graphics mode. To get the maximum number of colors, we can use the function getmaxcolor().

 

The possible color values are from 0 - 15 BLACK, BLUE, GREEN, CYAN, RED, MAGENTA, BROWN, LIGHTGRAY, DARKGRAY, LIGHTBLUE, LIGHTGREEN, LIGHTCYAN, LIGHTRED, LIGHTMAGENTA, YELLOW, WHITE and BLINK (128).

 

Once you set the background color, the backgroung is changed to the specified color. The sample code is given below on this page. This program uses RED color as its background.

 

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Source Code

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#include <graphics.h>

#include <stdio.h>

#include <math.h>

#include <conio.h>

#include <dos.h>

#include <stdlib.h>

 

void main()

{

 

       int i, grd, grm;

       int x, y, w;

       int left,top,right,bottom;

       int margin, width, height;

       int gresult;

       int cx, cy;

       char msg[512];

       char buffer[] = "softwareandfinance.com";

 

       // Detect the graphics driver and mode

       detectgraph(&grd,&grm);

       // initialize the graphics mode with initgraph

       initgraph(&grd, &grm, "");

 

       gresult = graphresult();

       if(gresult != grOk)

       {

              printf(grapherrormsg(gresult));

              getch();

              return;

       }

 

       // set the background color

       setbkcolor(RED);

       // set the foreground color

       setcolor(WHITE);

       // draw a white color border with rectangle

       rectangle(0,0,getmaxx(),getmaxy());

 

       // find the text width and text height

       width = textwidth(buffer);

       height = textheight(buffer);

       margin = 100; // 100 pixel margin

       left = margin;

       top = margin;

       // calculate the right and bottom with margin and getmaxx and getmaxy function

       bottom = getmaxy() - margin;

       right = getmaxx() - margin;

 

       // draw a bar with solid fill on blue color

       // use rectangle to have a white color border

       setfillstyle(SOLID_FILL, BLUE);

       bar(left, top, right, bottom);

       rectangle(left, top, right, bottom);;

 

       // change the text foreground color to yellow

       setcolor(YELLOW);

       cx = (right + left - width) / 2;

       cy = (bottom + top - height) / 2;

       outtextxy(cx,cy,buffer);

 

       setcolor(WHITE);

       sprintf(msg, "background: %d, foreground: %d, maxcolors: %d", getbkcolor(), getcolor(), getmaxcolor());

       width = textwidth(msg);

       cx = (right + left - width) / 2;

       cy += textheight(msg) + 10;;

 

       // use moveto and outtext function instead of outtextxy

       moveto(cx, cy);

       outtext(msg);

 

       getch();

       closegraph();

}

 

 

Output

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