node_composite_rotate.c

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/*
 * ***** 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 "node_composite_util.h"

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

static bNodeSocketTemplate cmp_node_rotate_in[]= {
    {   SOCK_RGBA, 1, "Image",          1.0f, 1.0f, 1.0f, 1.0f},
    {   SOCK_FLOAT, 1, "Degr",          0.0f, 0.0f, 0.0f, 0.0f, -10000.0f, 10000.0f, PROP_ANGLE},
    {   -1, 0, ""   }
};
static bNodeSocketTemplate cmp_node_rotate_out[]= {
    {   SOCK_RGBA, 0, "Image"},
    {   -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= in[1]->vec[0];


        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(bNodeTree *UNUSED(ntree), bNode* node, bNodeTemplate *UNUSED(ntemp))
{
    node->custom1= 1; /* Bilinear Filter*/
}

void register_node_type_cmp_rotate(bNodeTreeType *ttype)
{
    static bNodeType ntype;

    node_type_base(ttype, &ntype, CMP_NODE_ROTATE, "Rotate", NODE_CLASS_DISTORT, NODE_OPTIONS);
    node_type_socket_templates(&ntype, 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(ttype, &ntype);
}