source: OGRE/trunk/ogrenew/OgreMain/include/OgreCompositorScriptCompiler.h @ 692

Revision 692, 6.0 KB checked in by mattausch, 18 years ago (diff)

adding ogre 1.2 and dependencies
Line 
1/*
2-----------------------------------------------------------------------------
3This source file is part of OGRE
4(Object-oriented Graphics Rendering Engine)
5For the latest info, see http://www.stevestreeting.com/ogre/
6
7Copyright (c) 2000-2005 The OGRE Team
8Also see acknowledgements in Readme.html
9
10This program is free software; you can redistribute it and/or modify it under
11the terms of the GNU General Public License as published by the Free Software
12Foundation; either version 2 of the License, or (at your option) any later
13version.
14
15This program is distributed in the hope that it will be useful, but WITHOUT
16ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
18
19You should have received a copy of the GNU General Public License along with
20this program; if not, write to the Free Software Foundation, Inc., 59 Temple
21Place - Suite 330, Boston, MA 02111-1307, USA, or go to
22http://www.gnu.org/copyleft/gpl.html.
23-----------------------------------------------------------------------------
24*/
25
26#ifndef __CompositorScriptScompiler_H__
27#define __CompositorScriptScompiler_H__
28
29#include "OgrePrerequisites.h"
30#include "OgreCompiler2Pass.h"
31#include "OgreCompositor.h"
32#include "OgreRenderSystem.h"
33
34
35namespace Ogre {
36
37        /** Compiler for parsing & lexing .compositor scripts */
38        class _OgreExport CompositorScriptCompiler : public Compiler2Pass
39        {
40
41        public:
42                CompositorScriptCompiler(void);
43                ~CompositorScriptCompiler(void);
44
45        /** gets BNF Grammer for Compositor script.
46        */
47        virtual const String& getClientBNFGrammer(void) { return compositorScript_BNF; }
48
49        /** get the name of the Compositor script BNF grammer.
50        */
51        virtual const String& getClientGrammerName(void) { static const String grammerName("Compositor Script"); return grammerName; }
52
53        protected:
54                // Token ID enumeration
55                enum TokenID {
56                        // Terminal Tokens section
57                        ID_UNKOWN = 0, ID_OPENBRACE, ID_CLOSEBRACE,
58                        // Top level
59                        ID_COMPOSITOR,
60                        // Techniques
61                        ID_TECHNIQUE, ID_TEXTURE, ID_TARGET_WIDTH, ID_TARGET_HEIGHT,
62                        ID_PF_A8R8G8B8, ID_PF_R8G8B8A8, ID_PF_R8G8B8,
63                        ID_PF_FLOAT16_R, ID_PF_FLOAT16_RGB, ID_PF_FLOAT16_RGBA,
64                        ID_PF_FLOAT32_R, ID_PF_FLOAT32_RGB, ID_PF_FLOAT32_RGBA,
65                        // Targets
66                        ID_TARGET, ID_INPUT, ID_TARGET_OUTPUT, ID_ONLY_INITIAL,
67                        ID_VISIBILITY_MASK, ID_LOD_BIAS, ID_MATERIAL_SCHEME,
68                        ID_PREVIOUS, ID_NONE,
69                        // Passes
70                        ID_PASS,
71                        ID_MATERIAL,
72                        ID_RENDER_QUAD, ID_CLEAR, ID_STENCIL, ID_RENDER_SCENE,
73                        ID_FIRST_RQ, ID_LAST_RQ,
74                        // clear
75                        ID_CLR_BUFF, ID_CLR_COLOUR, ID_CLR_DEPTH,
76                        ID_CLR_COLOUR_VAL, ID_CLR_DEPTH_VAL, ID_CLR_STENCIL_VAL,
77                        // stencil
78                        ID_ST_CHECK, ID_ST_FUNC, ID_ST_REF_VAL, ID_ST_MASK, ID_ST_FAILOP,
79                        ID_ST_DEPTH_FAILOP, ID_ST_PASSOP, ID_ST_TWOSIDED,
80
81                        // compare functions
82            ID_ST_ALWAYS_FAIL, ID_ST_ALWAYS_PASS, ID_ST_LESS,
83            ID_ST_LESS_EQUAL, ID_ST_EQUAL, ID_ST_NOT_EQUAL,
84            ID_ST_GREATER_EQUAL, ID_ST_GREATER,
85
86            // stencil operations
87            ID_ST_KEEP, ID_ST_ZERO, ID_ST_REPLACE, ID_ST_INCREMENT,
88            ID_ST_DECREMENT, ID_ST_INCREMENT_WRAP, ID_ST_DECREMENT_WRAP,
89            ID_ST_INVERT,
90
91                        // general
92                        ID_ON, ID_OFF, ID_TRUE, ID_FALSE
93                };
94
95                /** Enum to identify compositor sections. */
96                enum CompositorScriptSection
97                {
98                        CSS_NONE,
99                        CSS_COMPOSITOR,
100                        CSS_TECHNIQUE,
101                        CSS_TARGET,
102                        CSS_PASS
103                };
104                /** Struct for holding the script context while parsing. */
105                struct CompositorScriptContext
106                {
107                        CompositorScriptSection section;
108                        CompositorPtr compositor;
109                        CompositionTechnique* technique;
110                        CompositionTargetPass* target;
111                        CompositionPass* pass;
112                };
113
114                CompositorScriptContext mScriptContext;
115
116                // static library database for tokens and BNF rules
117                static TokenRule compositorScript_RulePath[];
118                // simplified Backus - Naur Form (BNF) grammer for compositor scripts
119                static String compositorScript_BNF;
120
121                typedef void (CompositorScriptCompiler::* CSC_Action)(void);
122                typedef std::map<size_t, CSC_Action> TokenActionMap;
123                typedef TokenActionMap::iterator TokenActionIterator;
124                /** Map of Token value as key to an Action.  An Action converts tokens into
125                the final format.
126            All instances use the same Token Action Map.
127                */
128                static TokenActionMap mTokenActionMap;
129
130                /** Execute an Action associated with a token.  Gets called when the compiler finishes tokenizing a
131                section of the source that has been parsed.
132                **/
133                virtual void executeTokenAction(const size_t tokenID);
134                /** Associate all the lexemes used in a material script with their corresponding tokens and actions.
135                **/
136        virtual void setupTokenDefinitions(void);
137                void addLexemeTokenAction(const String& lexeme, const size_t token, const CSC_Action action = 0);
138
139                void logParseError(const String& error);
140
141                // Token Actions which get called when tokens are created during parsing.
142                void parseOpenBrace(void);
143                void parseCloseBrace(void);
144                void parseCompositor(void);
145                void parseTechnique(void);
146                void parseTexture(void);
147                void parseTarget(void);
148                void parseInput(void);
149                void parseTargetOutput(void);
150                void parseOnlyInitial(void);
151                void parseVisibilityMask(void);
152                void parseLodBias(void);
153                void parseMaterialScheme(void);
154                void parsePass(void);
155                void parseMaterial(void);
156                void parseFirstRenderQueue(void);
157                void parseLastRenderQueue(void);
158                void parseClearBuffers(void);
159                void parseClearColourValue(void);
160                void parseClearDepthValue(void);
161                void parseClearStencilValue(void);
162                void parseStencilCheck(void);
163                void parseStencilFunc(void);
164                void parseStencilRefVal(void);
165                void parseStencilMask(void);
166                void parseStencilFailOp(void);
167                void parseStencilDepthFailOp(void);
168                void parseStencilPassOp(void);
169                void parseStencilTwoSided(void);
170                StencilOperation extractStencilOp(void);
171        CompareFunction extractCompareFunc(void);
172        };
173}
174
175#endif
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