getpixel() function in C

The header file graphics.h contains getpixel() function which returns the color of pixel present at location (x, y).

Syntax :

int getpixel(int x, int y);

Note : By default the screen is BLACK, therefore color of pixel at (0,0) is BLACK.



Below is the implementation of getpixel() function.

filter_none

edit
close

play_arrow

link
brightness_4
code

// C Implementation for getpixel()
#include <graphics.h>
#include <stdio.h>
  
// driver code
int main()
{
    // gm is Graphics mode which is
    // a computer display mode that
    // generates image using pixels.
    // DETECT is a macro defined in
    // "graphics.h" header file
    int gd = DETECT, gm, color;
    char arr[50];
  
    // initgraph initializes the
    // graphics system by loading a
    // graphics driver from disk
    initgraph(&gd, &gm, "");
  
    // getpixel function
    color = getpixel(0, 0);
  
    // sprintf stands for “String print”.
    // Instead of printing on console,
    // it store output on char buffer
    // which are specified in sprintf
    sprintf(arr, "color of pixel at (0,0) = %d",
                                       color);
  
    // outtext function displays text
    // at current position.
    outtext(arr);
  
    getch();
  
    // closegraph function closes the
    // graphics mode and deallocates
    // all memory allocated by
    // graphics system .
    closegraph();
  
    return 0;
}

chevron_right


Output :


Explanation : As nothing is drawn anything on screen and by default screen is BLACK, therefore color of pixel at (0, 0) is BLACK as 0 indicates BLACK color.



My Personal Notes arrow_drop_up

In love with a semicolon because sometimes i miss it so badly)

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.




Article Tags :
Practice Tags :


Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.