Differential D3030 Diff 15156 ps/trunk/source/graphics/PreprocessorWrapper.h

Changeset View

Standalone View

ps/trunk/source/graphics/PreprocessorWrapper.h

	/* Copyright (C) 2020 Wildfire Games.			/* Copyright (C) 2021 Wildfire Games.
	* This file is part of 0 A.D.			* This file is part of 0 A.D.
	*			*
	* 0 A.D. is free software: you can redistribute it and/or modify			* 0 A.D. is free software: you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by			* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation, either version 2 of the License, or			* the Free Software Foundation, either version 2 of the License, or
	* (at your option) any later version.			* (at your option) any later version.
	*			*
	* 0 A.D. is distributed in the hope that it will be useful,			* 0 A.D. is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of			* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.			* GNU General Public License for more details.
	*			*
	* You should have received a copy of the GNU General Public License			* You should have received a copy of the GNU General Public License
	* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.			* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
	*/			*/

	#ifndef INCLUDED_PREPROCESSORWRAPPER			#ifndef INCLUDED_PREPROCESSORWRAPPER
	#define INCLUDED_PREPROCESSORWRAPPER			#define INCLUDED_PREPROCESSORWRAPPER

	#include "ps/CStr.h"			#include "ps/CStr.h"
	#include "third_party/ogre3d_preprocessor/OgreGLSLPreprocessor.h"			#include "third_party/ogre3d_preprocessor/OgreGLSLPreprocessor.h"

				#include <functional>
				#include <map>

	class CShaderDefines;			class CShaderDefines;

	/**			/**
	* Convenience wrapper around CPreprocessor.			* Convenience wrapper around CPreprocessor.
	*/			*/
	class CPreprocessorWrapper			class CPreprocessorWrapper
	{			{
	public:			public:
				using IncludeRetrieverCallback = std::function<bool(const CStr&, CStr& out)>;

	CPreprocessorWrapper();			CPreprocessorWrapper();
				CPreprocessorWrapper(const IncludeRetrieverCallback& includeCallback);

	void AddDefine(const char* name, const char* value);			void AddDefine(const char* name, const char* value);

	void AddDefines(const CShaderDefines& defines);			void AddDefines(const CShaderDefines& defines);

	bool TestConditional(const CStr& expr);			bool TestConditional(const CStr& expr);

				// Find all #include directives in the input and replace them by
				// by a file content from the directive's argument. Parsing is strict
				// and simple. The directive will be expanded in comments and multiline
				// strings.
				CStr ResolveIncludes(CStr source);

	CStr Preprocess(const CStr& input);			CStr Preprocess(const CStr& input);

	static void PyrogenesisShaderError(int iLine, const char* iError, const Ogre::CPreprocessor::Token* iToken);			static void PyrogenesisShaderError(int iLine, const char* iError, const Ogre::CPreprocessor::Token* iToken);

	private:			private:
	Ogre::CPreprocessor m_Preprocessor;			Ogre::CPreprocessor m_Preprocessor;
				IncludeRetrieverCallback m_IncludeCallback;
				std::unordered_map<CStr, CStr> m_IncludeCache;
	};			};

	#endif // INCLUDED_PREPROCESSORWRAPPER			#endif // INCLUDED_PREPROCESSORWRAPPER