<commit_before>/**
 * projectM -- Milkdrop-esque visualisation SDK
 * Copyright (C)2003-2004 projectM Team
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * See 'LICENSE.txt' included within this release
 *
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <iostream>
#include "projectM.hpp"

#include "fatal.h"
#include "Common.hpp"

#include "Expr.hpp"
#include "Eval.hpp"
#include "Param.hpp"
#include "PerPixelEqn.hpp"
#include <map>

#include "wipemalloc.h"
#include <cassert>
/* Evaluates a per pixel equation */
void PerPixelEqn::evaluate() {

  float ** param_matrix = NULL;
  GenExpr * eqn_ptr = NULL;
  int x,y;

  eqn_ptr = gen_expr; 
 if (param->matrix == NULL) {
    if (PER_PIXEL_EQN_DEBUG) printf("evalPerPixelEqn: [begin initializing matrix] (index = %d) (name = %s)\n", 
  			  index, param->name.c_str());

    param_matrix = (float**)wipemalloc(param->gx*sizeof(float*));
    param->matrix = param_matrix;

    for(x = 0; x < param->gx; x++)
      param_matrix[x] = (float *)wipemalloc(param->gy * sizeof(float));

    for (x = 0; x < param->gx; x++)
      for (y = 0; y < param->gy; y++)
	    param_matrix[x][y] = 0.0;

  }
  else 
    param_matrix = (float**)param->matrix;
 
  assert(!(eqn_ptr == NULL || param_matrix == NULL));

//    param->matrix_flag = 0;         /** Force matrix ignore to update time */
  for (int mesh_i = 0; mesh_i < param->gx; mesh_i++) { 
    for (int mesh_j = 0; mesh_j < param->gy; mesh_j++) {
//	std::cout << "gx,gy is " << param->gx << "," << param->gy << std::endl;
      param_matrix[mesh_i][mesh_j] = eqn_ptr->eval_gen_expr(mesh_i, mesh_j);
    }
  }
  
  /* Now that this parameter has been referenced with a per
     pixel equation, we let the evaluator know by setting
     this flag */
  param->matrix_flag = true; 
   param->flags |= P_FLAG_PER_PIXEL;
}

PerPixelEqn::PerPixelEqn(int _index, Param * _param, GenExpr * _gen_expr):index(_index), param(_param), gen_expr(_gen_expr) {

	assert(index >= 0);
	assert(param != 0);
	assert(gen_expr != 0);
}
<commit_msg>cleanup and review of per pixel eqn matrix initialization<commit_after>/**
 * projectM -- Milkdrop-esque visualisation SDK
 * Copyright (C)2003-2004 projectM Team
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * See 'LICENSE.txt' included within this release
 *
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <iostream>
#include "projectM.hpp"

#include "fatal.h"
#include "Common.hpp"

#include "Expr.hpp"
#include "Eval.hpp"
#include "Param.hpp"
#include "PerPixelEqn.hpp"
#include <map>

#include "wipemalloc.h"
#include <cassert>
/* Evaluates a per pixel equation */
void PerPixelEqn::evaluate() {

  GenExpr * eqn_ptr = 0;
  int x,y;

 eqn_ptr = this->gen_expr;

 float ** param_matrix = (float**)this->param->matrix;

 if (param_matrix == 0) {
    if (PER_PIXEL_EQN_DEBUG) printf("evalPerPixelEqn: [begin initializing matrix] (index = %d) (name = %s)\n", 
  			  index, param->name.c_str());

    param_matrix = (float**)wipemalloc(param->gx*sizeof(float*));
    for(x = 0; x < param->gx; x++)
      param_matrix[x] = (float *)wipemalloc(param->gy * sizeof(float));

    for (x = 0; x < param->gx; x++)
      for (y = 0; y < param->gy; y++) {
	    /// @slow is this necessary?
	    param_matrix[x][y] = 0.0;
      }
    this->param->matrix = param_matrix;
  }

  assert(!(eqn_ptr == NULL || param_matrix == NULL));

//    param->matrix_flag = 0;         /** Force matrix ignore to update time */
  for (int mesh_i = 0; mesh_i < param->gx; mesh_i++) { 
    for (int mesh_j = 0; mesh_j < param->gy; mesh_j++) {
//	std::cout << "gx,gy is " << param->gx << "," << param->gy << std::endl;
      param_matrix[mesh_i][mesh_j] = eqn_ptr->eval_gen_expr(mesh_i, mesh_j);
    }
  }
  
  /* Now that this parameter has been referenced with a per
     pixel equation, we let the evaluator know by setting
     this flag */
  /// @bug review and verify this behavior
  param->matrix_flag = true;
  param->flags |= P_FLAG_PER_PIXEL;
}

PerPixelEqn::PerPixelEqn(int _index, Param * _param, GenExpr * _gen_expr):index(_index), param(_param), gen_expr(_gen_expr) {

	assert(index >= 0);
	assert(param != 0);
	assert(gen_expr != 0);
	
}

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