blender-archive/source/blender/imbuf/intern/rotate.c

/**
 *
 * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
 *
 * 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. The Blender
 * Foundation also sells licenses for use in proprietary software under
 * the Blender License.  See http://www.blender.org/BL/ for information
 * about this.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL/BL DUAL LICENSE BLOCK *****
 * rotate.c
 *
 * $Id$
 */

#include "BLI_blenlib.h"

#include "imbuf.h"
#include "imbuf_patch.h"
#include "IMB_imbuf_types.h"
#include "IMB_imbuf.h"

#include "IMB_allocimbuf.h"

void IMB_flipy(struct ImBuf * ibuf)
{
	short x, y;
	unsigned int *top, *bottom, do_float=0, *line;
	float *topf=NULL, *bottomf=NULL, *linef=NULL;

	if (ibuf == NULL) return;
	if (ibuf->rect == NULL) return;
	
	if (ibuf->rect_float) do_float =1;

	x = ibuf->x;
	y = ibuf->y;

	top = ibuf->rect;
	bottom = top + ((y-1) * x);
	line= MEM_mallocN(x*sizeof(int), "linebuf");
	
	if (do_float) {
		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(line, top, x*sizeof(int));
		memcpy(top, bottom, x*sizeof(int));
		memcpy(bottom, line, x*sizeof(int));
		bottom -= x;
		top+= x;
		
		if(do_float) {
			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(line);
	if(linef) MEM_freeN(linef);
}

void IMB_flipx(struct ImBuf * ibuf)
{
	short x, y, xr, xl, yi;
	unsigned int px;
	float px_f[4];
	
	if (ibuf == NULL) return;
	if (ibuf->rect == NULL) return;

	x = ibuf->x;
	y = ibuf->y;
	for(yi=y-1;yi>=0;yi--) {
		for(xr=x-1, xl=0; xr>=xl; xr--, xl++) {
			px =					ibuf->rect[(x*yi)+xr];
			ibuf->rect[(x*yi)+xr] =	ibuf->rect[(x*yi)+xl];
			ibuf->rect[(x*yi)+xl] =	px;		
			
			if (ibuf->rect_float) {
				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));
			}
		}
	}
}