| 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); | |
| } | |