/**
 * Basic test for gdImageGrayScale()
 */


#include "gd.h"
#include "gdtest.h"


int main()
{
    gdImagePtr im;
    FILE *fp;
    char *path;

    fp = gdTestFileOpen2("gdimagegrayscale", "basic.png");
    im = gdImageCreateFromPng(fp);
    fclose(fp);

    gdImageGrayScale(im);

    path = gdTestFilePath2("gdimagegrayscale", "basic_exp.png");
    gdAssertImageEqualsToFile(path, im);
    gdFree(path);

    gdImageDestroy(im);

    return gdNumFailures();
}