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#include "gd.h"
void gdImageFlipVertical(gdImagePtr im)
{
register int x, y;
if (im->trueColor) {
for (y = 0; y < im->sy / 2; y++) {
int *row_dst = im->tpixels[y];
int *row_src = im->tpixels[im->sy - 1 - y];
for (x = 0; x < im->sx; x++) {
register int p;
p = row_dst[x];
row_dst[x] = im->tpixels[im->sy - 1 - y][x];
row_src[x] = p;
}
}
} else {
unsigned char p;
for (y = 0; y < im->sy / 2; y++) {
for (x = 0; x < im->sx; x++) {
p = im->pixels[y][x];
im->pixels[y][x] = im->pixels[im->sy - 1 - y][x];
im->pixels[im->sy - 1 - y][x] = p;
}
}
}
return;
}
void gdImageFlipHorizontal(gdImagePtr im)
{
int x, y;
if (im->trueColor) {
int *px1, *px2, tmp;
for (y = 0; y < im->sy; y++) {
px1 = im->tpixels[y];
px2 = im->tpixels[y] + im->sx - 1;
for (x = 0; x < (im->sx >> 1); x++) {
tmp = *px1;
*px1 = *px2;
*px2 = tmp;
px1++;
px2--;
}
}
} else {
unsigned char *px1, *px2, tmp;
for (y = 0; y < im->sy; y++) {
px1 = im->pixels[y];
px2 = im->pixels[y] + im->sx - 1;
for (x = 0; x < (im->sx >> 1); x++) {
tmp = *px1;
*px1 = *px2;
*px2 = tmp;
px1++;
px2--;
}
}
}
}
void gdImageFlipBoth(gdImagePtr im)
{
gdImageFlipVertical(im);
gdImageFlipHorizontal(im);
}
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