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/* Copyright 2015-2019 Egor Yusov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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 OF ANY PROPRIETARY RIGHTS.
*
* In no event and under no legal theory, whether in tort (including negligence),
* contract, or otherwise, unless required by applicable law (such as deliberate
* and grossly negligent acts) or agreed to in writing, shall any Contributor be
* liable for any damages, including any direct, indirect, special, incidental,
* or consequential damages of any character arising as a result of this License or
* out of the use or inability to use the software (including but not limited to damages
* for loss of goodwill, work stoppage, computer failure or malfunction, or any and
* all other commercial damages or losses), even if such Contributor has been advised
* of the possibility of such damages.
*/
#include "pch.h"
#include "ShaderVariableParser.h"
namespace Diligent
{
const Char* ShaderVariableParser::ShaderVariableLibName = "ShaderVariable";
ShaderVariableParser::ShaderVariableParser( IRenderDevice *pRenderDevice, lua_State *L,
const String &PSOLibMetatableName,
const String &BufferLibMetatableName,
const String &BufferViewLibMetatableName,
const String &TexViewMetatableName ) :
EngineObjectParserBase( pRenderDevice, L, ShaderVariableLibName ),
m_PSOLibMetatableName(PSOLibMetatableName),
m_BufferLibMetatableName(BufferLibMetatableName),
m_BufferViewLibMetatableName(BufferViewLibMetatableName),
m_TexViewMetatableName(TexViewMetatableName),
m_SetBinding( this, L, m_MetatableRegistryName.c_str(), "Set", &ShaderVariableParser::Set ),
m_GetStaticVariableByNameBinding( this, L, m_PSOLibMetatableName.c_str(), "GetStaticVariableByName", &ShaderVariableParser::GetStaticVariableByName ),
m_GetStaticVariableByIndexBinding( this, L, m_PSOLibMetatableName.c_str(), "GetStaticVariableByIndex", &ShaderVariableParser::GetStaticVariableByIndex )
{
};
void ShaderVariableParser::CreateObj( lua_State *L )
{
auto NumArgs = lua_gettop( L );
if( NumArgs < 3 )
{
SCRIPT_PARSING_ERROR( L, "2 arguments (shader type and variable name) are expected" );
}
INIT_LUA_STACK_TRACKING(L);
// Shader should be the first argument
auto *pPSO = *GetUserData<IPipelineState**>( L, 1, m_PSOLibMetatableName.c_str() );
SHADER_TYPE ShaderType = SHADER_TYPE_UNKNOWN;
EnumMemberBinder<SHADER_TYPE> ShaderTypeParser(0, "ShaderType", m_ShaderTypeEnumMapping);
ShaderTypeParser.SetValue(L, 2, &ShaderType);
IShaderResourceVariable *pVar = nullptr;
if (lua_type(L,3) == LUA_TSTRING)
{
// Variable name should be the second argument
auto VarName = ReadValueFromLua<String>( L, 3 );
pVar = pPSO->GetStaticVariableByName(ShaderType, VarName.c_str() );
}
else
{
// Variable name should be the second argument
auto VarIndex = ReadValueFromLua<int>( L, 3 );
pVar = pPSO->GetStaticVariableByIndex(ShaderType, VarIndex );
}
auto pNewShaderVarLuaObj = reinterpret_cast<IShaderResourceVariable**>(lua_newuserdata( L, sizeof( IShaderResourceVariable* ) ));
*pNewShaderVarLuaObj = pVar;
pVar->AddRef();
CHECK_LUA_STACK_HEIGHT( +1 );
}
void ShaderVariableParser::DestroyObj( void *pData )
{
if( pData != nullptr )
{
auto ppShaderVar = reinterpret_cast<IShaderResourceVariable**>(pData);
if( *ppShaderVar != nullptr )
(*ppShaderVar)->Release();
}
}
void ShaderVariableParser::ReadField( lua_State *L, void *pData, const Char *Field )
{
SCRIPT_PARSING_ERROR(L, "Shader variables have no fields that can be read")
}
void ShaderVariableParser::UpdateField( lua_State *L, void *pData, const Char *Field )
{
SCRIPT_PARSING_ERROR(L, "Shader variables have no fields that can be updated")
}
void ShaderVariableParser::PushExistingObject( lua_State *L, const void *pObject )
{
auto pShaderVariable = reinterpret_cast<IShaderResourceVariable**>(lua_newuserdata( L, sizeof( IShaderResourceVariable* ) ));
*pShaderVariable = reinterpret_cast<IShaderResourceVariable*>( const_cast<void*>(pObject) );
(*pShaderVariable)->AddRef();
}
int ShaderVariableParser::Set( lua_State *L )
{
// Shader variable is the first argument
auto *pShaderVar = *GetUserData<IShaderResourceVariable**>( L, 1, m_MetatableRegistryName.c_str() );
IDeviceObject *pObject = nullptr;
auto ArgType = lua_type( L, 2 );
if( ArgType == LUA_TUSERDATA )
{
auto ppObject = reinterpret_cast<IDeviceObject**>( luaL_testudata( L, 2, m_BufferLibMetatableName.c_str() ) );
if( !ppObject )
ppObject = reinterpret_cast<IDeviceObject**>( luaL_testudata( L, 2, m_BufferViewLibMetatableName.c_str() ) );
if( !ppObject )
ppObject = reinterpret_cast<IDeviceObject**>( luaL_testudata( L, 2, m_TexViewMetatableName.c_str() ) );
if( ppObject )
{
pObject = *ppObject;
}
else
{
SCRIPT_PARSING_ERROR(L, "Set() function expects buffer, buffer view or texture view as an argument")
}
}
else if( ArgType == LUA_TNIL )
{
pObject = nullptr;
}
else
{
SCRIPT_PARSING_ERROR(L, "Set() function expects user data or nil")
}
pShaderVar->Set( pObject );
return 0;
}
int ShaderVariableParser::GetStaticVariableByName( lua_State *L )
{
return LuaCreate(L);
}
int ShaderVariableParser::GetStaticVariableByIndex( lua_State *L )
{
return LuaCreate(L);
}
void ShaderVariableParser::GetObjectByName( lua_State *L, const Char *ShaderName, IShaderResourceVariable** ppObject )
{
auto pObject = *GetGlobalObject<IShaderResourceVariable**>( L, ShaderName, m_MetatableRegistryName.c_str() );
*ppObject = pObject;
pObject->AddRef();
}
}
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