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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
* rotate.c
*/
/** \file
* \ingroup imbuf
*/
#include "BLI_utildefines.h"
#include "MEM_guardedalloc.h"
#include "IMB_imbuf.h"
#include "IMB_imbuf_types.h"
#include "imbuf.h"
void IMB_flipy(struct ImBuf *ibuf)
{
int x, y;
if (ibuf == NULL) {
return;
}
if (ibuf->rect) {
unsigned int *top, *bottom, *line;
x = ibuf->x;
y = ibuf->y;
top = ibuf->rect;
bottom = top + ((y - 1) * x);
line = MEM_mallocN(x * sizeof(int), "linebuf");
y >>= 1;
for (; y > 0; y--) {
memcpy(line, top, x * sizeof(int));
memcpy(top, bottom, x * sizeof(int));
memcpy(bottom, line, x * sizeof(int));
bottom -= x;
top += x;
}
MEM_freeN(line);
}
if (ibuf->rect_float) {
float *topf = NULL, *bottomf = NULL, *linef = NULL;
x = ibuf->x;
y = ibuf->y;
topf = ibuf->rect_float;
bottomf = topf + 4 * ((y - 1) * x);
linef = MEM_mallocN(4 * x * sizeof(float), "linebuff");
y >>= 1;
for (; y > 0; y--) {
memcpy(linef, topf, 4 * x * sizeof(float));
memcpy(topf, bottomf, 4 * x * sizeof(float));
memcpy(bottomf, linef, 4 * x * sizeof(float));
bottomf -= 4 * x;
topf += 4 * x;
}
MEM_freeN(linef);
}
}
void IMB_flipx(struct ImBuf *ibuf)
{
int x, y, xr, xl, yi;
float px_f[4];
if (ibuf == NULL) {
return;
}
x = ibuf->x;
y = ibuf->y;
if (ibuf->rect) {
for (yi = y - 1; yi >= 0; yi--) {
for (xr = x - 1, xl = 0; xr >= xl; xr--, xl++) {
SWAP(unsigned int, ibuf->rect[(x * yi) + xr], ibuf->rect[(x * yi) + xl]);
}
}
}
if (ibuf->rect_float) {
for (yi = y - 1; yi >= 0; yi--) {
for (xr = x - 1, xl = 0; xr >= xl; xr--, xl++) {
memcpy(&px_f, &ibuf->rect_float[((x * yi) + xr) * 4], 4 * sizeof(float));
memcpy(&ibuf->rect_float[((x * yi) + xr) * 4],
&ibuf->rect_float[((x * yi) + xl) * 4],
4 * sizeof(float));
memcpy(&ibuf->rect_float[((x * yi) + xl) * 4], &px_f, 4 * sizeof(float));
}
}
}
}
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