node_composite_viewer.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"


/* **************** VIEWER ******************** */
static bNodeSocketTemplate cmp_node_viewer_in[]= {
    {   SOCK_RGBA, 1, "Image",      0.0f, 0.0f, 0.0f, 1.0f},
    {   SOCK_FLOAT, 1, "Alpha",     1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, PROP_NONE},
    {   SOCK_FLOAT, 1, "Z",         1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, PROP_NONE},
    {   -1, 0, ""   }
};


static void node_composit_exec_viewer(void *data, bNode *node, bNodeStack **in, bNodeStack **UNUSED(out))
{
    /* image assigned to output */
    /* stack order input sockets: col, alpha, z */
    
    if(node->id && (node->flag & NODE_DO_OUTPUT)) { /* only one works on out */
        RenderData *rd= data;
        Image *ima= (Image *)node->id;
        ImBuf *ibuf;
        CompBuf *cbuf, *tbuf;
        int rectx, recty;
        void *lock;
        
        BKE_image_user_calc_frame(node->storage, rd->cfra, 0);

        /* always returns for viewer image, but we check nevertheless */
        ibuf= BKE_image_acquire_ibuf(ima, node->storage, &lock);
        if(ibuf==NULL) {
            printf("node_composit_exec_viewer error\n");
            BKE_image_release_ibuf(ima, lock);
            return;
        }
        
        /* free all in ibuf */
        imb_freerectImBuf(ibuf);
        imb_freerectfloatImBuf(ibuf);
        IMB_freezbuffloatImBuf(ibuf);
        
        /* get size */
        tbuf= in[0]->data?in[0]->data:(in[1]->data?in[1]->data:in[2]->data);
        if(tbuf==NULL) {
            rectx= 320; recty= 256;
        }
        else {
            rectx= tbuf->x;
            recty= tbuf->y;
        }
        
        /* make ibuf, and connect to ima */
        ibuf->x= rectx;
        ibuf->y= recty;
        imb_addrectfloatImBuf(ibuf);
        
        ima->ok= IMA_OK_LOADED;

        /* now we combine the input with ibuf */
        cbuf= alloc_compbuf(rectx, recty, CB_RGBA, 0);  /* no alloc*/
        cbuf->rect= ibuf->rect_float;
        
        /* when no alpha, we can simply copy */
        if(in[1]->data==NULL) {
            composit1_pixel_processor(node, cbuf, in[0]->data, in[0]->vec, do_copy_rgba, CB_RGBA);
        }
        else
            composit2_pixel_processor(node, cbuf, in[0]->data, in[0]->vec, in[1]->data, in[1]->vec, do_copy_a_rgba, CB_RGBA, CB_VAL);
        
        /* zbuf option */
        if(in[2]->data) {
            CompBuf *zbuf= alloc_compbuf(rectx, recty, CB_VAL, 1);
            ibuf->zbuf_float= zbuf->rect;
            ibuf->mall |= IB_zbuffloat;
            
            composit1_pixel_processor(node, zbuf, in[2]->data, in[2]->vec, do_copy_value, CB_VAL);
            
            /* free compbuf, but not the rect */
            zbuf->malloc= 0;
            free_compbuf(zbuf);
        }

        BKE_image_release_ibuf(ima, lock);

        generate_preview(data, node, cbuf);
        free_compbuf(cbuf);

    }
    else if(in[0]->data) {
        generate_preview(data, node, in[0]->data);
    }
}

static void node_composit_init_viewer(bNodeTree *UNUSED(ntree), bNode* node, bNodeTemplate *UNUSED(ntemp))
{
    ImageUser *iuser= MEM_callocN(sizeof(ImageUser), "node image user");
    node->storage= iuser;
    iuser->sfra= 1;
    iuser->fie_ima= 2;
    iuser->ok= 1;
}

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

    node_type_base(ttype, &ntype, CMP_NODE_VIEWER, "Viewer", NODE_CLASS_OUTPUT, NODE_PREVIEW);
    node_type_socket_templates(&ntype, cmp_node_viewer_in, NULL);
    node_type_size(&ntype, 80, 60, 200);
    node_type_init(&ntype, node_composit_init_viewer);
    node_type_storage(&ntype, "ImageUser", node_free_standard_storage, node_copy_standard_storage);
    node_type_exec(&ntype, node_composit_exec_viewer);
    /* Do not allow muting this node. */
    node_type_mute(&ntype, NULL, NULL);

    nodeRegisterType(ttype, &ntype);
}