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texture.c

/* texture.c
 *
 *
 * $Id: texture.c,v 1.22 2004/12/07 14:46:48 ton Exp $
 *
 * ***** BEGIN GPL/BL DUAL 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. The Blender
 * Foundation also sells licenses for use in proprietary software under
 * the Blender License.  See http://www.blender.org/BL/ for information
 * about this.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL/BL DUAL LICENSE BLOCK *****
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#ifdef WIN32
#include "BLI_winstuff.h"
#endif

#include "MEM_guardedalloc.h"

#include "PIL_dynlib.h"

#include "MTC_matrixops.h"

#include "BLI_blenlib.h"
#include "BLI_arithb.h"
#include "BLI_rand.h"

#include "DNA_texture_types.h"
#include "DNA_key_types.h"
#include "DNA_object_types.h"
#include "DNA_lamp_types.h"
#include "DNA_material_types.h"
#include "DNA_image_types.h"

#include "IMB_imbuf_types.h"
#include "IMB_imbuf.h"

#include "BKE_osa_types.h"
#include "BKE_plugin_types.h"

#include "BKE_bad_level_calls.h"
#include "BKE_utildefines.h"

#include "BKE_global.h"
#include "BKE_main.h"

#include "BKE_library.h"
#include "BKE_image.h"
#include "BKE_material.h"
#include "BKE_texture.h"
#include "BKE_key.h"
#include "BKE_ipo.h"




/* ------------------------------------------------------------------------- */

/* All support for plugin textures: */
int test_dlerr(const char *name,  const char *symbol)
{
      char *err;
      
      err= PIL_dynlib_get_error_as_string(NULL);
      if(err) {
            printf("var1: %s, var2: %s, var3: %s\n", name, symbol, err);
            return 1;
      }
      
      return 0;
}

/* ------------------------------------------------------------------------- */

void open_plugin_tex(PluginTex *pit)
{
      int (*version)(void);
      
      /* init all the happy variables */
      pit->doit= 0;
      pit->pname= 0;
      pit->stnames= 0;
      pit->varstr= 0;
      pit->result= 0;
      pit->cfra= 0;
      pit->version= 0;
      
      /* clear the error list */
      PIL_dynlib_get_error_as_string(NULL);

      /* no PIL_dynlib_close! multiple opened plugins... */
      /* if(pit->handle) PIL_dynlib_close(pit->handle); */
      /* pit->handle= 0; */

      /* open the needed object */
      pit->handle= PIL_dynlib_open(pit->name);
      if(test_dlerr(pit->name, pit->name)) return;

      if (pit->handle != 0) {
            /* find the address of the version function */
            version= (int (*)(void)) PIL_dynlib_find_symbol(pit->handle, "plugin_tex_getversion");
            if (test_dlerr(pit->name, "plugin_tex_getversion")) return;
            
            if (version != 0) {
                  pit->version= version();
                  if (pit->version==2 || pit->version==3) {
                        int (*info_func)(PluginInfo *);
                        PluginInfo *info= (PluginInfo*) MEM_mallocN(sizeof(PluginInfo), "plugin_info"); 

                        info_func= (int (*)(PluginInfo *))PIL_dynlib_find_symbol(pit->handle, "plugin_getinfo");
                        if (!test_dlerr(pit->name, "plugin_getinfo")) {

                              info_func(info);

                              pit->doit= (int(*)(void)) info->tex_doit;
                              pit->callback= (void(*)(unsigned short)) info->callback;
                              pit->stypes= info->stypes;
                              pit->vars= info->nvars;
                              pit->pname= info->name;
                              pit->stnames= info->snames;
                              pit->varstr= info->varstr;
                              pit->result= info->result;
                              pit->cfra= info->cfra;
                              if (info->init) info->init();
                        }
                        MEM_freeN(info);
                  } else {
                        printf ("Plugin returned unrecognized version number\n");
                        return;
                  }
            }
      }
}

/* ------------------------------------------------------------------------- */

PluginTex *add_plugin_tex(char *str)
{
      PluginTex *pit;
      VarStruct *varstr;
      int a;
      
      pit= MEM_callocN(sizeof(PluginTex), "plugintex");
      
      strcpy(pit->name, str);
      open_plugin_tex(pit);
      
      if(pit->doit==0) {
            if(pit->handle==0) error("no plugin: %s", str);
            else error("in plugin: %s", str);
            MEM_freeN(pit);
            return NULL;
      }
      
      varstr= pit->varstr;
      for(a=0; a<pit->vars; a++, varstr++) {
            if( (varstr->type & FLO)==FLO)
                  pit->data[a]= varstr->def;
            else if( (varstr->type & INT)==INT)
                  *((int *)(pit->data+a))= (int) varstr->def;
      }

      return pit;
}

/* ------------------------------------------------------------------------- */

void free_plugin_tex(PluginTex *pit)
{
      if(pit==0) return;
            
      /* no PIL_dynlib_close: same plugin can be opened multiple times, 1 handle */
      MEM_freeN(pit);   
}

/* ****************** COLORBAND ******************* */

ColorBand *add_colorband()
{
      ColorBand *coba;
      int a;
      
      coba= MEM_callocN( sizeof(ColorBand), "colorband");
      
      coba->data[0].r= 0.0;
      coba->data[0].g= 0.0;
      coba->data[0].b= 0.0;
      coba->data[0].a= 0.0;
      coba->data[0].pos= 0.0;

      coba->data[1].r= 0.0;
      coba->data[1].g= 1.0;
      coba->data[1].b= 1.0;
      coba->data[1].a= 1.0;
      coba->data[1].pos= 1.0;
      
      for(a=2; a<MAXCOLORBAND; a++) {
            coba->data[a].r= 0.5;
            coba->data[a].g= 0.5;
            coba->data[a].b= 0.5;
            coba->data[a].a= 1.0;
            coba->data[a].pos= 0.5;
      }
      
      coba->tot= 2;
      
      return coba;
}

/* ------------------------------------------------------------------------- */

int do_colorband(ColorBand *coba, float in, float out[4])
{
      /* These vars form the texture channel, in render/intern/texture.c */
      extern int Talpha;
      CBData *cbd1, *cbd2, *cbd0, *cbd3;
      float fac, mfac, t[4];
      int a;
      
      if(coba->tot==0) return 0;
      Talpha= 1;
      
      cbd1= coba->data;
      if(coba->tot==1) {
            out[0]= cbd1->r;
            out[1]= cbd1->g;
            out[2]= cbd1->b;
            out[3]= cbd1->a;
      }
      else {
            if(in < cbd1->pos) in= cbd1->pos;

            /* we're looking for first pos > in */
            for(a=0; a<coba->tot; a++, cbd1++) if(cbd1->pos > in) break;
                  
            if(a==coba->tot) cbd1--;
            if(in > cbd1->pos) in= cbd1->pos;
            
            cbd2= cbd1-1;
            fac= (in-cbd1->pos)/(cbd2->pos-cbd1->pos);
            
            if(coba->ipotype==2) {
                  /* ipo from right to left: 3 2 1 0 */
                  
                  if(a>=coba->tot-1) cbd0= cbd1;
                  else cbd0= cbd1+1;
                  if(a<2) cbd3= cbd2;
                  else cbd3= cbd2-1;
                  
                  set_four_ipo(fac, t, KEY_BSPLINE);

                  out[0]= t[3]*cbd3->r +t[2]*cbd2->r +t[1]*cbd1->r +t[0]*cbd0->r;
                  out[1]= t[3]*cbd3->g +t[2]*cbd2->g +t[1]*cbd1->g +t[0]*cbd0->g;
                  out[2]= t[3]*cbd3->b +t[2]*cbd2->b +t[1]*cbd1->b +t[0]*cbd0->b;
                  out[3]= t[3]*cbd3->a +t[2]*cbd2->a +t[1]*cbd1->a +t[0]*cbd0->a;
                  CLAMP(out[0], 0.0, 1.0);
                  CLAMP(out[1], 0.0, 1.0);
                  CLAMP(out[2], 0.0, 1.0);
                  CLAMP(out[3], 0.0, 1.0);
            }
            else {
            
                  if(coba->ipotype==1) {  /* EASE */
                        mfac= fac*fac;
                        fac= 3.0f*mfac-2.0f*mfac*fac;
                  }
                  mfac= 1.0f-fac;
                  
                  out[0]= mfac*cbd1->r + fac*cbd2->r;
                  out[1]= mfac*cbd1->g + fac*cbd2->g;
                  out[2]= mfac*cbd1->b + fac*cbd2->b;
                  out[3]= mfac*cbd1->a + fac*cbd2->a;
            }
      }
      return 1;   /* OK */
}

/* ******************* TEX ************************ */

void free_texture(Tex *tex)
{
      free_plugin_tex(tex->plugin);
      if(tex->coba) MEM_freeN(tex->coba);
      if(tex->env) RE_free_envmap(tex->env);
}

/* ------------------------------------------------------------------------- */

void default_tex(Tex *tex)
{
      PluginTex *pit;
      VarStruct *varstr;
      int a;

      tex->stype= 0;
      tex->flag= TEX_CHECKER_ODD;
      tex->imaflag= TEX_INTERPOL+TEX_MIPMAP;
      tex->extend= TEX_REPEAT;
      tex->cropxmin= tex->cropymin= 0.0;
      tex->cropxmax= tex->cropymax= 1.0;
      tex->xrepeat= tex->yrepeat= 1;
      tex->fie_ima= 2;
      tex->sfra= 1;
      tex->frames= 0;
      tex->offset= 0;
      tex->noisesize= 0.25;
      tex->noisedepth= 2;
      tex->turbul= 5.0;
      tex->nabla= 0.025;      // also in do_versions
      tex->bright= 1.0;
      tex->contrast= tex->filtersize= 1.0;
      tex->rfac= 1.0;
      tex->gfac= 1.0;
      tex->bfac= 1.0;
      /* newnoise: init. */
      tex->noisebasis = 0;
      tex->noisebasis2 = 0;
      /* musgrave */
      tex->mg_H = 1.0;
      tex->mg_lacunarity = 2.0;
      tex->mg_octaves = 2.0;
      tex->mg_offset = 1.0;
      tex->mg_gain = 1.0;
      tex->ns_outscale = 1.0;
      /* distnoise */
      tex->dist_amount = 1.0;
      /* voronoi */
      tex->vn_w1 = 1.0;
      tex->vn_w2 = tex->vn_w3 = tex->vn_w4 = 0.0;
      tex->vn_mexp = 2.5;
      tex->vn_distm = 0;
      tex->vn_coltype = 0;

      if (tex->env) {
            tex->env->stype=ENV_STATIC;
            tex->env->clipsta=0.1;
            tex->env->clipend=100;
            tex->env->cuberes=100;
            tex->env->depth=0;
      }

      pit = tex->plugin;
      if (pit) {
                  varstr= pit->varstr;
                  if(varstr) {
                              for(a=0; a<pit->vars; a++, varstr++) {
                                    pit->data[a] = varstr->def;
                              }
                  }
      }
}

/* ------------------------------------------------------------------------- */

Tex *add_texture(char *name)
{
      Tex *tex;

      tex= alloc_libblock(&G.main->tex, ID_TE, name);
      
      default_tex(tex);
      
      return tex;
}

/* ------------------------------------------------------------------------- */

void default_mtex(MTex *mtex)
{
      mtex->texco= TEXCO_ORCO;
      mtex->mapto= MAP_COL;
      mtex->object= 0;
      mtex->projx= PROJ_X;
      mtex->projy= PROJ_Y;
      mtex->projz= PROJ_Z;
      mtex->mapping= MTEX_FLAT;
      mtex->ofs[0]= 0.0;
      mtex->ofs[1]= 0.0;
      mtex->ofs[2]= 0.0;
      mtex->size[0]= 1.0;
      mtex->size[1]= 1.0;
      mtex->size[2]= 1.0;
      mtex->tex= 0;
      mtex->texflag= 0;
      mtex->colormodel= 0;
      mtex->r= 1.0;
      mtex->g= 0.0;
      mtex->b= 1.0;
      mtex->k= 1.0;
      mtex->def_var= 1.0;
      mtex->blendtype= MTEX_BLEND;
      mtex->colfac= 1.0;
      mtex->norfac= 0.5;
      mtex->varfac= 1.0;
      mtex->dispfac=0.2;
}


/* ------------------------------------------------------------------------- */

MTex *add_mtex()
{
      MTex *mtex;
      
      mtex= MEM_callocN(sizeof(MTex), "add_mtex");
      
      default_mtex(mtex);
      
      return mtex;
}

/* ------------------------------------------------------------------------- */

Tex *copy_texture(Tex *tex)
{
      Tex *texn;
      
      texn= copy_libblock(tex);
      if(texn->type==TEX_IMAGE) id_us_plus((ID *)texn->ima);
      else texn->ima= 0;
      
      if(texn->plugin) {
            texn->plugin= MEM_dupallocN(texn->plugin);
            open_plugin_tex(texn->plugin);
      }
      
      if(texn->coba) texn->coba= MEM_dupallocN(texn->coba);
      if(texn->env) texn->env= RE_copy_envmap(texn->env);
      
      return texn;
}

/* ------------------------------------------------------------------------- */

void make_local_texture(Tex *tex)
{
      Tex *texn;
      Material *ma;
      World *wrld;
      Lamp *la;
      int a, local=0, lib=0;

      /* - only lib users: do nothing
          * - only local users: set flag
          * - mixed: make copy
          */
      
      if(tex->id.lib==0) return;

      /* special case: ima always local immediately */
      if(tex->ima) {
            tex->ima->id.lib= 0;
            tex->ima->id.flag= LIB_LOCAL;
            new_id(0, (ID *)tex->ima, 0);
      }

      if(tex->id.us==1) {
            tex->id.lib= 0;
            tex->id.flag= LIB_LOCAL;
            new_id(0, (ID *)tex, 0);

            return;
      }
      
      ma= G.main->mat.first;
      while(ma) {
            for(a=0; a<MAX_MTEX; a++) {
                  if(ma->mtex[a] && ma->mtex[a]->tex==tex) {
                        if(ma->id.lib) lib= 1;
                        else local= 1;
                  }
            }
            ma= ma->id.next;
      }
      la= G.main->lamp.first;
      while(la) {
            for(a=0; a<MAX_MTEX; a++) {
                  if(la->mtex[a] && la->mtex[a]->tex==tex) {
                        if(la->id.lib) lib= 1;
                        else local= 1;
                  }
            }
            la= la->id.next;
      }
      wrld= G.main->world.first;
      while(wrld) {
            for(a=0; a<MAX_MTEX; a++) {
                  if(wrld->mtex[a] && wrld->mtex[a]->tex==tex) {
                        if(wrld->id.lib) lib= 1;
                        else local= 1;
                  }
            }
            wrld= wrld->id.next;
      }
      
      if(local && lib==0) {
            tex->id.lib= 0;
            tex->id.flag= LIB_LOCAL;
            new_id(0, (ID *)tex, 0);
      }
      else if(local && lib) {
            texn= copy_texture(tex);
            texn->id.us= 0;
            
            ma= G.main->mat.first;
            while(ma) {
                  for(a=0; a<MAX_MTEX; a++) {
                        if(ma->mtex[a] && ma->mtex[a]->tex==tex) {
                              if(ma->id.lib==0) {
                                    ma->mtex[a]->tex= texn;
                                    texn->id.us++;
                                    tex->id.us--;
                              }
                        }
                  }
                  ma= ma->id.next;
            }
            la= G.main->lamp.first;
            while(la) {
                  for(a=0; a<MAX_MTEX; a++) {
                        if(la->mtex[a] && la->mtex[a]->tex==tex) {
                              if(la->id.lib==0) {
                                    la->mtex[a]->tex= texn;
                                    texn->id.us++;
                                    tex->id.us--;
                              }
                        }
                  }
                  la= la->id.next;
            }
            wrld= G.main->world.first;
            while(wrld) {
                  for(a=0; a<MAX_MTEX; a++) {
                        if(wrld->mtex[a] && wrld->mtex[a]->tex==tex) {
                              if(wrld->id.lib==0) {
                                    wrld->mtex[a]->tex= texn;
                                    texn->id.us++;
                                    tex->id.us--;
                              }
                        }
                  }
                  wrld= wrld->id.next;
            }

      }
}

/* ------------------------------------------------------------------------- */

void autotexname(Tex *tex)
{
/*    extern char texstr[20][12];    *//* buttons.c, already in bad lev calls*/
      Image *ima;
      char di[FILE_MAXDIR], fi[FILE_MAXFILE];
      
      if(tex) {
            if(tex->type==TEX_IMAGE) {
                  ima= tex->ima;
                  if(ima) {
                        strcpy(di, ima->name);
                        BLI_splitdirstring(di, fi);
                        strcpy(di, "I.");
                        strcat(di, fi);
                        new_id(&G.main->tex, (ID *)tex, di);
                  }
                  else new_id(&G.main->tex, (ID *)tex, texstr[tex->type]);
            }
            else if(tex->type==TEX_PLUGIN && tex->plugin) new_id(&G.main->tex, (ID *)tex, tex->plugin->pname);
            else new_id(&G.main->tex, (ID *)tex, texstr[tex->type]);
      }
}

/* ------------------------------------------------------------------------- */

Tex *give_current_texture(Object *ob, int act)
{
      Material ***matarar, *ma;
      Lamp *la = 0;
      MTex *mtex = 0;
      Tex *tex = 0;
      
      if(ob==0) return 0;
      if(ob->totcol==0) return 0;
      
      if(ob->type==OB_LAMP) {
            la=(Lamp *)ob->data;
            if(la) {
                  mtex= la->mtex[(int)(la->texact)];
                  if(mtex) tex= mtex->tex;
            }
            else tex= 0;
      } else {
            if(act>ob->totcol) act= ob->totcol;
            else if(act==0) act= 1;
            
            if( BTST(ob->colbits, act-1) ) {    /* in object */
                  ma= ob->mat[act-1];
            }
            else {                                                /* in data */
                  matarar= give_matarar(ob);
                  
                  if(matarar && *matarar) ma= (*matarar)[act-1];
                  else ma= 0;
                  
            }
            if(ma) {
                  mtex= ma->mtex[(int)(ma->texact)];
                  if(mtex) tex= mtex->tex;
            }
            else tex= 0;
      }
      
      return tex;
}

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