node_composite_scale.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"

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

static bNodeSocketTemplate cmp_node_scale_in[]= {
    {   SOCK_RGBA, 1, "Image",          1.0f, 1.0f, 1.0f, 1.0f},
    {   SOCK_FLOAT, 1, "X",             1.0f, 0.0f, 0.0f, 0.0f, 0.0001f, CMP_SCALE_MAX, PROP_FACTOR},
    {   SOCK_FLOAT, 1, "Y",             1.0f, 0.0f, 0.0f, 0.0f, 0.0001f, CMP_SCALE_MAX, PROP_FACTOR},
    {   -1, 0, ""   }
};
static bNodeSocketTemplate cmp_node_scale_out[]= {
    {   SOCK_RGBA, 0, "Image"},
    {   -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);
    }
    else if (node->custom1==CMP_SCALE_ABSOLUTE) {
        CompBuf *stackbuf;
        int a, x, y;
        float *fp;

        x = MAX2((int)in[1]->vec[0], 1);
        y = MAX2((int)in[2]->vec[0], 1);

        stackbuf = alloc_compbuf(x, y, CB_RGBA, 1);
        fp = stackbuf->rect;

        a = stackbuf->x * stackbuf->y;
        while(a--) {
            copy_v4_v4(fp, in[0]->vec);
            fp += 4;
        }

        out[0]->data= stackbuf;
    }
}

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

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

    nodeRegisterType(ttype, &ntype);
}