CMP_scale.c

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/*
 * $Id: CMP_scale.c 35237 2011-02-27 20:13:22Z jesterking $
 *
 * ***** 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"

/* **************** Scale  ******************** */

#define CMP_SCALE_MAX   12000

static bNodeSocketType cmp_node_scale_in[]= {
        {       SOCK_RGBA, 1, "Image",                  0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
        {       SOCK_VALUE, 1, "X",                             1.0f, 0.0f, 0.0f, 0.0f, 0.0001f, CMP_SCALE_MAX},
        {       SOCK_VALUE, 1, "Y",                             1.0f, 0.0f, 0.0f, 0.0f, 0.0001f, CMP_SCALE_MAX},
        {       -1, 0, ""       }
};
static bNodeSocketType cmp_node_scale_out[]= {
        {       SOCK_RGBA, 0, "Image",                  0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
        {       -1, 0, ""       }
};

/* only supports RGBA nodes now */
/* node->custom1 stores if input values are absolute or relative scale */
static void node_composit_exec_scale(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
{
        if(out[0]->hasoutput==0)
                return;
        
        if(in[0]->data) {
                RenderData *rd= data;
                CompBuf *stackbuf, *cbuf= typecheck_compbuf(in[0]->data, CB_RGBA);
                ImBuf *ibuf;
                int newx, newy;
                
                if(node->custom1==CMP_SCALE_RELATIVE) {
                        newx= MAX2((int)(in[1]->vec[0]*cbuf->x), 1);
                        newy= MAX2((int)(in[2]->vec[0]*cbuf->y), 1);
                }
                else if(node->custom1==CMP_SCALE_SCENEPERCENT) {
                        newx = cbuf->x * (rd->size / 100.0f);
                        newy = cbuf->y * (rd->size / 100.0f);
                }
                else if (node->custom1==CMP_SCALE_RENDERPERCENT) {
                        newx= (rd->xsch * rd->size)/100;
                        newy= (rd->ysch * rd->size)/100;
                } else {        /* CMP_SCALE_ABSOLUTE */
                        newx= MAX2((int)in[1]->vec[0], 1);
                        newy= MAX2((int)in[2]->vec[0], 1);
                }
                newx= MIN2(newx, CMP_SCALE_MAX);
                newy= MIN2(newy, CMP_SCALE_MAX);

                ibuf= IMB_allocImBuf(cbuf->x, cbuf->y, 32, 0);
                if(ibuf) {
                        ibuf->rect_float= cbuf->rect;
                        IMB_scaleImBuf(ibuf, newx, newy);
                        
                        if(ibuf->rect_float == cbuf->rect) {
                                /* no scaling happened. */
                                stackbuf= pass_on_compbuf(in[0]->data);
                        }
                        else {
                                stackbuf= alloc_compbuf(newx, newy, CB_RGBA, 0);
                                stackbuf->rect= ibuf->rect_float;
                                stackbuf->malloc= 1;
                        }

                        ibuf->rect_float= NULL;
                        ibuf->mall &= ~IB_rectfloat;
                        IMB_freeImBuf(ibuf);
                        
                        /* also do the translation vector */
                        stackbuf->xof = (int)(((float)newx/(float)cbuf->x) * (float)cbuf->xof);
                        stackbuf->yof = (int)(((float)newy/(float)cbuf->y) * (float)cbuf->yof);
                }
                else {
                        stackbuf= dupalloc_compbuf(cbuf);
                        printf("Scaling to %dx%d failed\n", newx, newy);
                }
                
                out[0]->data= stackbuf;
                if(cbuf!=in[0]->data)
                        free_compbuf(cbuf);
        }
}

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

        node_type_base(&ntype, CMP_NODE_SCALE, "Scale", NODE_CLASS_DISTORT, NODE_OPTIONS,
                cmp_node_scale_in, cmp_node_scale_out);
        node_type_size(&ntype, 140, 100, 320);
        node_type_exec(&ntype, node_composit_exec_scale);

        nodeRegisterType(lb, &ntype);
}