csgfx/shaderexp.h Source File (Crystal Space 2.0 Public API Reference)

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csgfx/shaderexp.h
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    00001 /*
    00002     Copyright (C) 2003 by Andrew Topp <designa@users.sourceforge.net>
    00003
    00004     This library is free software; you can redistribute it and/or
    00005     modify it under the terms of the GNU Library General Public
    00006     License as published by the Free Software Foundation; either
    00007     version 2 of the License, or (at your option) any later version.
    00008
    00009     This library is distributed in the hope that it will be useful,
    00010     but WITHOUT ANY WARRANTY; without even the implied warranty of
    00011     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00012     Library General Public License for more details.
    00013
    00014     You should have received a copy of the GNU Library General Public
    00015     License along with this library; if not, write to the Free
    00016     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
    00017 */
    00018
    00019 #ifndef __CS_GFX_SHADEREXP_H__
    00020 #define __CS_GFX_SHADEREXP_H__
    00021
    00026 #include "csextern.h"
    00027
    00028 #include "csutil/strhash.h"
    00029 #include "csutil/array.h"
    00030 #include "csutil/leakguard.h"
    00031 #include "csgeom/vector4.h"
    00032 #include "csgfx/shadervarnameparser.h"
    00033 #include "ivideo/shader/shader.h"
    00034
    00035 struct iObjectRegistry;
    00036 class csShaderVariable;
    00037 struct iShaderVariableContext;
    00038 struct iStringSet;
    00039 struct iDocumentNode;
    00040 struct cons;
    00041
    00045 class CS_CRYSTALSPACE_EXPORT csShaderExpression
    00046 {
    00047 public:
    00048   CS_LEAKGUARD_DECLARE (csShaderExpression);
    00049
    00050   struct oper_arg
    00051   {
    00052     uint8 type;
    00053
    00054     struct SvVarValue
    00055     {
    00056       CS::StringIDValue id;
    00057       size_t* indices;
    00058     };
    00059     union
    00060     {
    00061       float num;
    00062       SvVarValue var;
    00063
    00064       // Illegal outside of a cons cell
    00065       int oper;
    00066       cons* cell;
    00067
    00068       // Special internal values
    00069       int acc;
    00070     };
    00071
    00072     csVector4 vec4;
    00073     CS::Math::Matrix4 matrix;
    00074   };
    00075
    00076   struct oper
    00077   {
    00078     uint8 opcode, acc;
    00079     oper_arg arg1, arg2;
    00080   };
    00081
    00082   typedef csArray<oper> oper_array;
    00083   typedef csArray<oper_arg> arg_array;
    00084
    00085 private:
    00086   iObjectRegistry* obj_reg;
    00088   csShaderVariableStack* stack;
    00090   csRef<iShaderVarStringSet> strset;
    00092   csMemoryPool svIndicesScratch;
    00094   oper_array opcodes;
    00099   int accstack_max;
    00105   arg_array accstack;
    00106
    00108   bool parse_xml (cons*, iDocumentNode*);
    00110   bool parse_xml_atom (oper_arg&, csStringID, const char*, const char*);
    00112   bool parse_sexp (cons*, iDocumentNode*);
    00115   bool parse_sexp_form (const char*& text, cons*);
    00117   bool parse_sexp_atom (const char*& text, cons*);
    00119   bool parse_num_atom (const char*& text, oper_arg&);
    00120
    00122   bool compile_cons (const cons*, int& acc_top);
    00124   bool compile_make_vector (const cons*, int& acc_top, int acc);
    00126   bool compile_if (const cons*, int& acc_top, int acc);
    00127
    00129   bool eval_const (cons*&);
    00130
    00132   bool eval_oper (int oper, oper_arg arg1, oper_arg arg2, oper_arg& output);
    00134   bool eval_oper (int oper, oper_arg arg1, oper_arg& output);
    00136   bool eval_oper (int oper, oper_arg& output);
    00137
    00139   bool eval_add (const oper_arg& arg1, const oper_arg& arg2,
    00140         oper_arg& output) const;
    00142   bool eval_sub (const oper_arg& arg1, const oper_arg& arg2,
    00143         oper_arg& output) const;
    00145   bool eval_mul (const oper_arg& arg1, const oper_arg& arg2,
    00146         oper_arg& output) const;
    00148   bool eval_div (const oper_arg& arg1, const oper_arg& arg2,
    00149         oper_arg& output) const;
    00150
    00152   bool eval_elt1 (const oper_arg& arg1, oper_arg& output) const;
    00154   bool eval_elt2 (const oper_arg& arg1, oper_arg& output) const;
    00156   bool eval_elt3 (const oper_arg& arg1, oper_arg& output) const;
    00158   bool eval_elt4 (const oper_arg& arg1, oper_arg& output) const;
    00159
    00161   bool eval_sin (const oper_arg& arg1, oper_arg& output) const;
    00163   bool eval_cos (const oper_arg& arg1, oper_arg& output) const;
    00165   bool eval_tan (const oper_arg& arg1, oper_arg& output) const;
    00166
    00167   bool eval_arcsin (const oper_arg& arg1, oper_arg& output) const;
    00168   bool eval_arccos (const oper_arg& arg1, oper_arg& output) const;
    00169   bool eval_arctan (const oper_arg& arg1, oper_arg& output) const;
    00170
    00171   bool eval_dot (const oper_arg& arg1, const oper_arg& arg2,
    00172         oper_arg& output) const;
    00173   bool eval_cross (const oper_arg& arg1, const oper_arg& arg2,
    00174         oper_arg& output) const;
    00175   bool eval_vec_len (const oper_arg& arg1, oper_arg& output) const;
    00176   bool eval_normal (const oper_arg& arg1, oper_arg& output) const;
    00178   bool eval_floor (const oper_arg& arg1, oper_arg& output) const;
    00179
    00180   bool eval_pow (const oper_arg& arg1, const oper_arg& arg2,
    00181         oper_arg& output) const;
    00182   bool eval_min (const oper_arg& arg1, const oper_arg& arg2,
    00183         oper_arg& output) const;
    00184   bool eval_max (const oper_arg& arg1, const oper_arg& arg2,
    00185         oper_arg& output) const;
    00186
    00188   bool eval_time (oper_arg& output) const;
    00190   bool eval_frame (oper_arg& output) const;
    00191
    00192   template<typename Comparator>
    00193   bool eval_compare (const Comparator& cmp, const oper_arg& arg1,
    00194     const oper_arg& arg2, oper_arg& output) const;
    00195
    00196   bool eval_matrix_column (const oper_arg& arg1, const oper_arg& arg2,
    00197         oper_arg& output) const;
    00198   bool eval_matrix_row (const oper_arg& arg1, const oper_arg& arg2,
    00199         oper_arg& output) const;
    00200   bool eval_matrix2gl (const oper_arg& arg1, oper_arg& output) const;
    00201   bool eval_matrix_transp (const oper_arg& arg1, oper_arg& output) const;
    00202   bool eval_matrix_inv (const oper_arg& arg1, oper_arg& output) const;
    00203
    00205   bool eval_selt12 (const oper_arg& arg1, const oper_arg& arg2,
    00206         oper_arg & output) const;
    00208   bool eval_selt34 (const oper_arg & arg1, const oper_arg & arg2,
    00209         oper_arg& output) const;
    00211   bool eval_load (const oper_arg& arg1, oper_arg& output) const;
    00213   bool eval_select (const oper_arg& arg1, const oper_arg& arg2,
    00214     oper_arg& output) const;
    00215
    00217   bool eval_variable (csShaderVariable*, oper_arg& out);
    00219   bool eval_argument (const oper_arg&, csShaderVariable*);
    00220
    00222   void destruct_cons (cons*) const;
    00224   void print_cons (const cons*) const;
    00226   void print_ops (const oper_array&) const;
    00228   void print_result (const oper_arg&) const;
    00229
    00230   /*inline*/static const char* GetTypeName (unsigned int id)/* const*/;
    00231   /*{
    00232     return xmltypes.Request(id);
    00233   }*/
    00234   static const char* GetOperName (unsigned int id);
    00235   static csStringID GetCommonTokenOp (const char* token);
    00236   static csStringID GetXmlTokenOp (const char* token);
    00237   static csStringID GetSexpTokenOp (const char* token);
    00238   static csStringID GetXmlType (const char* token);
    00239
    00241   size_t* AllocSVIndices (const CS::Graphics::ShaderVarNameParser& parser);
    00242   csShaderVariable* ResolveVar (const oper_arg::SvVarValue& var);
    00243
    00244   mutable csString errorMsg;
    00245   void ParseError (const char* message, ...) const;
    00246   void EvalError (const char* message, ...) const;
    00247 public:
    00248   csShaderExpression (iObjectRegistry*);
    00249   ~csShaderExpression ();
    00250
    00252   bool Parse (iDocumentNode*);
    00254
    00258   bool Evaluate (csShaderVariable*, csShaderVariableStack& stacks);
    00260
    00262   const char* GetError () const { return errorMsg; }
    00263 };
    00264
    00265 #endif