src/libprojectM/MilkdropPresetFactory/PerPixelEqn.cpp

/**
 * 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 "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(int mesh_i, int mesh_j) {

  GenExpr * eqn_ptr = 0;


 eqn_ptr = this->gen_expr;

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

 if (param_matrix == 0) {
	 assert(param->engine_val);
	 (*(float*)param->engine_val) = eqn_ptr->eval_gen_expr(mesh_i, mesh_j);

  } else {

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

  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);

}


PerPixelEqn::~PerPixelEqn()
{
	if (gen_expr)
		delete (gen_expr);

}