/* ----------------------------------------------------------------------------- This source file is part of OGRE (Object-oriented Graphics Rendering Engine) For the latest info, see http://www.ogre3d.org Copyright (c) 2000-2014 Torus Knot Software Ltd Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ----------------------------------------------------------------------------- */ #ifndef _ShaderProgramFunction_ #define _ShaderProgramFunction_ #include "OgreShaderPrerequisites.h" #include "OgreShaderParameter.h" #include "OgreShaderFunctionAtom.h" namespace Ogre { namespace RTShader { /** \addtogroup Optional * @{ */ /** \addtogroup RTShader * @{ */ /// represents a @ref FFPShaderStage, part of a Function class _OgreRTSSExport FunctionStageRef { friend class Function; public: /** call a library function * @param name the function name * @param inout function argument */ void callFunction(const char* name, const InOut& inout) const; /// @overload void callFunction(const char* name, const std::vector& params) const; /// @overload void callFunction(const char* name, const In& arg, const Out& ret) const { callFunction(name, {arg, ret}); } /// @overload void callFunction(const char* name, const In& arg0, const In& arg1, const Out& ret) const { callFunction(name, {arg0, arg1, ret}); } /// dst = texture(sampler, texcoord); void sampleTexture(const In& sampler, const In& texcoord, const Out& dst) const { sampleTexture({sampler, texcoord, dst}); } /// @overload void sampleTexture(const std::vector& params) const; /// to = from; void assign(const In& from, const Out& to) const { assign({from, to}); } /// @overload void assign(const std::vector& params) const; /// dst = arg0 * arg1; void mul(const In& arg0, const In& arg1, const Out& dst) const { binaryOp('*', {arg0, arg1, dst}); } /// dst = arg0 / arg1; void div(const In& arg0, const In& arg1, const Out& dst) const { binaryOp('/', {arg0, arg1, dst}); } /// dst = arg0 - arg1; void sub(const In& arg0, const In& arg1, const Out& dst) const { binaryOp('-', {arg0, arg1, dst}); } /// dst = arg0 + arg1; void add(const In& arg0, const In& arg1, const Out& dst) const { binaryOp('+', {arg0, arg1, dst}); } /// dst = arg0 OP arg1; void binaryOp(char op, const std::vector& params) const; /// shorthand for "dst = BUILTIN(args);" void callBuiltin(const char* name, const std::vector& params) const; /// @overload void callBuiltin(const char* name, const In& arg, const Out& ret) const { callBuiltin(name, {arg, ret}); } /// @overload void callBuiltin(const char* name, const In& arg0, const In& arg1, const Out& ret) const { callBuiltin(name, {arg0, arg1, ret}); } /// @overload void callBuiltin(const char* name, const In& arg0, const In& arg1, const In& arg2, const Out& ret) const { callBuiltin(name, {arg0, arg1, arg2, ret}); } private: uint32 mStage; Function* mParent; FunctionStageRef(uint32 stage, Function* parent) : mStage(stage), mParent(parent) {} }; /** A class that represents a shader based program function. */ class _OgreRTSSExport Function : public RTShaderSystemAlloc { friend class ProgramManager; // Interface. public: /// @deprecated ParameterPtr resolveInputParameter(Parameter::Semantic semantic, int index, int content, GpuConstantType type); /** Resolve input parameter of this function @param content The content of the parameter. @param type The type of the desired parameter. @return parameter instance in case of that resolve operation succeeded. */ ParameterPtr resolveInputParameter(int content, GpuConstantType type = GCT_UNKNOWN) { return resolveInputParameter(Parameter::SPS_UNKNOWN, 0, content, type); } /// resolve input parameter from previous output ParameterPtr resolveInputParameter(const ParameterPtr& out) { OgreAssert(out, "parameter must not be NULL"); return resolveInputParameter(out->getSemantic(), out->getIndex(), out->getContent(), out->getType()); } /** * get input parameter by content * @param content * @param type The type of the desired parameter. * @return parameter or NULL if not found */ ParameterPtr getInputParameter(int content, GpuConstantType type = GCT_UNKNOWN) { return _getParameterByContent(mInputParameters, content, type); } /// @deprecated ParameterPtr resolveOutputParameter(Parameter::Semantic semantic, int index, int content, GpuConstantType type); /** Resolve output parameter of this function @param content The content of the parameter. @param type The type of the desired parameter. @return parameter instance in case of that resolve operation succeeded. */ ParameterPtr resolveOutputParameter(int content, GpuConstantType type = GCT_UNKNOWN) { return resolveOutputParameter(Parameter::SPS_UNKNOWN, 0, content, type); } /** * get output parameter by content * @param content * @param type The type of the desired parameter. * @return parameter or NULL if not found */ ParameterPtr getOutputParameter(int content, GpuConstantType type = GCT_UNKNOWN) { return _getParameterByContent(mOutputParameters, content, type); } /** Resolve local parameter of this function local parameters do not have index or semantic. @param name The name of the parameter. @param type The type of the desired parameter. @param arraySize If > 0, the parameter will be an array of the given size. @return parameter instance in case of that resolve operation succeeded. */ ParameterPtr resolveLocalParameter(GpuConstantType type, const String& name, size_t arraySize = 0); /** Resolve local parameter of this function local parameters do not have index or semantic. @param content The content of the parameter. @param type The type of the desired parameter. @return parameter instance in case of that resolve operation succeeded. */ ParameterPtr resolveLocalParameter(int content, GpuConstantType type = GCT_UNKNOWN); ParameterPtr resolveLocalStructParameter(const String& type, const String& name); /** * get local parameter by content * @param content * @return parameter or NULL if not found */ ParameterPtr getLocalParameter(int content) { return _getParameterByContent(mLocalParameters, content, GCT_UNKNOWN); } /// @overload ParameterPtr getLocalParameter(const String& name) { return _getParameterByName(mLocalParameters, name); } /** Return a list of input parameters. */ const ShaderParameterList& getInputParameters() const { return mInputParameters; } /** Return a list of output parameters. */ const ShaderParameterList& getOutputParameters() const { return mOutputParameters; } /** Return a list of local parameters. */ const ShaderParameterList& getLocalParameters() const { return mLocalParameters; } /** Add a function atom instance to this function. @param atomInstance The atom instance to add. */ void addAtomInstance(FunctionAtom* atomInstance); /// get a @ref FFPShaderStage of this function FunctionStageRef getStage(uint32 s) { return FunctionStageRef(s, this); } /** Delete a function atom instance from this function. @param atomInstance The atom instance to OGRE_DELETE. */ bool deleteAtomInstance(FunctionAtom* atomInstance); /** Return list of atom instances composing this function. (Const version) */ const FunctionAtomInstanceList& getAtomInstances(); /** Add input parameter to this function. */ void addInputParameter(ParameterPtr parameter); /** Add output parameter to this function. */ void addOutputParameter(ParameterPtr parameter); /** Delete input parameter from this function. */ void deleteInputParameter(ParameterPtr parameter); /** Delete output parameter from this function. */ void deleteOutputParameter(ParameterPtr parameter); /** Delete all input parameters from this function. */ void deleteAllInputParameters(); /** Delete all output parameters from this function. */ void deleteAllOutputParameters(); explicit Function(GpuProgramType type = GPT_VERTEX_PROGRAM); private: static ParameterPtr _getParameterByName(const ShaderParameterList& parameterList, const String& name); static ParameterPtr _getParameterBySemantic(const ShaderParameterList& parameterList, const Parameter::Semantic semantic, int index); static ParameterPtr _getParameterByContent(const ShaderParameterList& parameterList, int content, GpuConstantType type); /** Class destructor */ ~Function(); /** Add parameter to given list */ void addParameter(ShaderParameterList& parameterList, ParameterPtr parameter); /** Delete parameter from a given list */ void deleteParameter(ShaderParameterList& parameterList, ParameterPtr parameter); // Input parameters. ShaderParameterList mInputParameters; // Output parameters. ShaderParameterList mOutputParameters; // Local parameters. ShaderParameterList mLocalParameters; // Atom instances composing this function. std::map mAtomInstances; FunctionAtomInstanceList mSortedAtomInstances; GpuProgramType mType; friend class Program; }; typedef std::vector ShaderFunctionList; typedef ShaderFunctionList::iterator ShaderFunctionIterator; typedef ShaderFunctionList::const_iterator ShaderFunctionConstIterator; /** @} */ /** @} */ } } #endif