node_composite_flip.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"

/* **************** Flip  ******************** */
static bNodeSocketTemplate cmp_node_flip_in[]= {
    {   SOCK_RGBA, 1, "Image",          1.0f, 1.0f, 1.0f, 1.0f},
    {   -1, 0, ""   }
};

static bNodeSocketTemplate cmp_node_flip_out[]= {
    {   SOCK_RGBA, 0, "Image"},
    {   -1, 0, ""   }
};

static void node_composit_exec_flip(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out)
{
    if(in[0]->data) {
        CompBuf *cbuf= in[0]->data;
        CompBuf *stackbuf= alloc_compbuf(cbuf->x, cbuf->y, cbuf->type, 1);  /* note, this returns zero'd image */
        int i, src_pix, src_width, src_height, srcydelt, outydelt, x, y;
        float *srcfp, *outfp;
        
        src_pix= cbuf->type;
        src_width= cbuf->x;
        src_height= cbuf->y;
        srcfp= cbuf->rect;
        outfp= stackbuf->rect;
        srcydelt= src_width*src_pix;
        outydelt= srcydelt;
        
        if(node->custom1) {     /*set up output pointer for y flip*/
            outfp+= (src_height-1)*outydelt;
            outydelt= -outydelt;
        }

        for(y=0; y<src_height; y++) {
            if(node->custom1 == 1) {    /* no x flip so just copy line*/
                memcpy(outfp, srcfp, sizeof(float) * src_pix * src_width);
                srcfp+=srcydelt;
            }
            else {
                outfp += (src_width-1)*src_pix;
                for(x=0; x<src_width; x++) {
                    for(i=0; i<src_pix; i++) {
                        outfp[i]= srcfp[i];
                    }
                    outfp -= src_pix;
                    srcfp += src_pix;
                }
                outfp += src_pix;
            }
            outfp += outydelt;
        }

        out[0]->data= stackbuf;

    }
}

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

    node_type_base(ttype, &ntype, CMP_NODE_FLIP, "Flip", NODE_CLASS_DISTORT, NODE_OPTIONS);
    node_type_socket_templates(&ntype, cmp_node_flip_in, cmp_node_flip_out);
    node_type_size(&ntype, 140, 100, 320);
    node_type_exec(&ntype, node_composit_exec_flip);

    nodeRegisterType(ttype, &ntype);
}