CMP_rotate.c

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/*
 * $Id: CMP_rotate.c 37836 2011-06-27 03:36:14Z campbellbarton $
 *
 * ***** BEGIN GPL 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. 
 *
 * 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) 2006 Blender Foundation.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "../CMP_util.h"

/* **************** Rotate  ******************** */

static bNodeSocketType cmp_node_rotate_in[]= {
        {       SOCK_RGBA, 1, "Image",                  0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
        {       SOCK_VALUE, 1, "Degr",                  0.0f, 0.0f, 0.0f, 0.0f, -10000.0f, 10000.0f},
        {       -1, 0, ""       }
};
static bNodeSocketType cmp_node_rotate_out[]= {
        {       SOCK_RGBA, 0, "Image",                  0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
        {       -1, 0, ""       }
};

/* only supports RGBA nodes now */
static void node_composit_exec_rotate(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out)
{

        if(out[0]->hasoutput==0)
                return;

        if(in[0]->data) {
                CompBuf *cbuf= typecheck_compbuf(in[0]->data, CB_RGBA);
                CompBuf *stackbuf= alloc_compbuf(cbuf->x, cbuf->y, CB_RGBA, 1); /* note, this returns zero'd image */
                float rad, u, v, s, c, centx, centy, miny, maxy, minx, maxx;
                int x, y, yo, xo;
                ImBuf *ibuf, *obuf;

                rad= (M_PI*in[1]->vec[0])/180.0f;

                s= sin(rad);
                c= cos(rad);
                centx= cbuf->x/2;
                centy= cbuf->y/2;

                minx= -centx;
                maxx= -centx + (float)cbuf->x;
                miny= -centy;
                maxy= -centy + (float)cbuf->y;


                ibuf=IMB_allocImBuf(cbuf->x, cbuf->y, 32, 0);
                obuf=IMB_allocImBuf(stackbuf->x, stackbuf->y, 32, 0);

                if(ibuf && obuf){
                        ibuf->rect_float=cbuf->rect;
                        obuf->rect_float=stackbuf->rect;

                        for(y=miny; y<maxy; y++) {
                                yo= y+(int)centy;

                                for(x=minx; x<maxx;x++) {
                                        u=c*x + y*s + centx;
                                        v=-s*x + c*y + centy;
                                        xo= x+(int)centx;

                                        switch(node->custom1) {
                                        case 0:
                                                neareast_interpolation(ibuf, obuf, u, v, xo, yo);
                                                break ;
                                        case 1:
                                                bilinear_interpolation(ibuf, obuf, u, v, xo, yo);
                                                break;
                                        case 2:
                                                bicubic_interpolation(ibuf, obuf, u, v, xo, yo);
                                                break;
                                        }

                                }
                        }

                        /* rotate offset vector too, but why negative rad, ehh?? Has to be replaced with [3][3] matrix once (ton) */
                        s= sin(-rad);
                        c= cos(-rad);
                        centx= (float)cbuf->xof; centy= (float)cbuf->yof;
                        stackbuf->xof= (int)( c*centx + s*centy);
                        stackbuf->yof= (int)(-s*centx + c*centy);

                        IMB_freeImBuf(ibuf);
                        IMB_freeImBuf(obuf);
                }

                /* pass on output and free */
                out[0]->data= stackbuf;
                if(cbuf!=in[0]->data) {
                        free_compbuf(cbuf);
                }
        }
}

static void node_composit_init_rotate(bNode *node)
{
        node->custom1= 1; /* Bilinear Filter*/
}

void register_node_type_cmp_rotate(ListBase *lb)
{
        static bNodeType ntype;

        node_type_base(&ntype, CMP_NODE_ROTATE, "Rotate", NODE_CLASS_DISTORT, NODE_OPTIONS,
                cmp_node_rotate_in, cmp_node_rotate_out);
        node_type_size(&ntype, 140, 100, 320);
        node_type_init(&ntype, node_composit_init_rotate);
        node_type_exec(&ntype, node_composit_exec_rotate);

        nodeRegisterType(lb, &ntype);
}