#include <math.h>
#include <stdio.h>
#include "gd.h"
gdImagePtr rotate (gdImagePtr imageptr)
{ gdImagePtr imrotate;
int
dimx = 0;
int
dimy = 0;
int
w = 0;
int
h = 0;
int
index = 0;
int
newrcolor = 0;
int
newgcolor = 0;
int
newbcolor = 0;
dimx = gdImageSX(imageptr);
dimy = gdImageSY(imageptr);
imrotate = gdImageCreateTrueColor(dimy,dimx);
for
(w = 0; w < dimx ; w++)
{
for
(h = 0; h < dimy ; h++)
{ newrcolor = gdImageRed(imageptr,gdImageGetPixel(imageptr,w,h));
newgcolor = gdImageGreen(imageptr,gdImageGetPixel(imageptr,w,h));
newbcolor = gdImageBlue(imageptr,gdImageGetPixel(imageptr,w,h));
index = gdImageColorExact(imrotate,newrcolor,newgcolor,newbcolor);
if
(index == -1) { index = gdImageColorAllocate(imrotate,newrcolor,newgcolor,newbcolor); }
gdImageSetPixel(imrotate,h,w,index);
}
}
return
imrotate;
}