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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 "ShaderResourceBindingParser.h"
namespace Diligent
{
const Char* ShaderResourceBindingParser::ShaderResourceBindingLibName = "ShaderResourceBinding";
ShaderResourceBindingParser::ShaderResourceBindingParser( IRenderDevice *pRenderDevice, lua_State *L,
const String &PSOLibMetatableName,
const String &ResMappingMetatableName,
const String &ShaderVarMetatableRegistryName ) :
EngineObjectParserBase( pRenderDevice, L, ShaderResourceBindingLibName ),
m_PSOLibMetatableName(PSOLibMetatableName),
m_ResMappingMetatableName(ResMappingMetatableName),
m_ShaderVarMetatableRegistryName(ShaderVarMetatableRegistryName),
m_BindResourcesBinding( this, L, m_MetatableRegistryName.c_str(), "BindResources", &ShaderResourceBindingParser::BindResources ),
m_GetVariableBinding( this, L, m_MetatableRegistryName.c_str(), "GetVariable", &ShaderResourceBindingParser::GetVariable ),
m_CreateShaderResourceBinding( this, L, PSOLibMetatableName.c_str(), "CreateShaderResourceBinding", &ShaderResourceBindingParser::CreateShaderResourceBinding ),
m_InitializeStaticResourcesBinding( this, L, m_MetatableRegistryName.c_str(), "InitializeStaticResources", &ShaderResourceBindingParser::InitializeStaticResources )
{
}
void ShaderResourceBindingParser::CreateObj( lua_State *L )
{
INIT_LUA_STACK_TRACKING(L);
// PSO should be the first argument
auto *pPSO = *GetUserData<IPipelineState**>( L, 1, m_PSOLibMetatableName.c_str() );
bool InitStaticResources = false;
auto NumArgs = lua_gettop( L );
if( NumArgs >= 2 )
{
InitStaticResources = ReadValueFromLua<Bool>( L, 2 );
}
auto pNewShaderResBndngLuaObj = reinterpret_cast<IShaderResourceBinding**>(lua_newuserdata( L, sizeof( IShaderResourceBinding* ) ));
pPSO->CreateShaderResourceBinding(pNewShaderResBndngLuaObj, InitStaticResources);
CHECK_LUA_STACK_HEIGHT( +1 );
}
void ShaderResourceBindingParser::DestroyObj( void *pData )
{
if( pData != nullptr )
{
auto ppShaderResBinding = reinterpret_cast<IShaderResourceBinding**>(pData);
if( *ppShaderResBinding != nullptr )
(*ppShaderResBinding)->Release();
}
}
void ShaderResourceBindingParser::ReadField( lua_State *L, void *pData, const Char *Field )
{
SCRIPT_PARSING_ERROR(L, "Shader resource binding have no fields that can be read")
}
void ShaderResourceBindingParser::UpdateField( lua_State *L, void *pData, const Char *Field )
{
SCRIPT_PARSING_ERROR(L, "Shader resource binding have no fields that can be updated")
}
void ShaderResourceBindingParser::PushExistingObject( lua_State *L, const void *pObject )
{
auto pShaderResourceBinding = reinterpret_cast<IShaderResourceBinding**>(lua_newuserdata( L, sizeof( IShaderResourceBinding* ) ));
*pShaderResourceBinding = reinterpret_cast<IShaderResourceBinding*>( const_cast<void*>(pObject) );
(*pShaderResourceBinding)->AddRef();
}
int ShaderResourceBindingParser::CreateShaderResourceBinding( lua_State *L )
{
return LuaCreate(L);
}
int ShaderResourceBindingParser::BindResources( lua_State *L )
{
try
{
auto NumArgs = lua_gettop( L );
if( NumArgs < 3 )
{
SCRIPT_PARSING_ERROR( L, "At least 2 arguments (shader flags and resource mapping) are expected" );
}
int ArgStackInd = 1;
auto *pResBinding = *GetUserData<IShaderResourceBinding**>( L, ArgStackInd, m_MetatableRegistryName.c_str() );
VERIFY( pResBinding, "Resource mapping pointer is null" );
if( !pResBinding )return 0;
++ArgStackInd;
Uint32 ShaderFlags = 0;
{
FlagsLoader<SHADER_TYPE> FlagsLoader(0, "BindShaderResourceFlags", m_ShaderTypeEnumMapping);
FlagsLoader.SetValue( L, ArgStackInd, &ShaderFlags );
}
++ArgStackInd;
auto *pResourceMapping = *GetUserData<IResourceMapping**>( L, ArgStackInd, m_ResMappingMetatableName.c_str() );
if( !pResourceMapping )
{
SCRIPT_PARSING_ERROR( L, "Incorrect 2nd argument type: resource mapping is expected" );
}
++ArgStackInd;
Uint32 Flags = 0;
// The last argument may be flags
if( NumArgs >= ArgStackInd &&
(lua_type( L, ArgStackInd ) == LUA_TSTRING || lua_type( L, ArgStackInd ) == LUA_TTABLE ) )
{
FlagsLoader<BIND_SHADER_RESOURCES_FLAGS> FlagsLoader(0, "BindShaderResourceFlags", m_BindShaderResFlagEnumMapping);
FlagsLoader.SetValue( L, ArgStackInd, &Flags );
}
pResBinding->BindResources( ShaderFlags, pResourceMapping, Flags );
}
catch( const std::runtime_error& )
{
}
return 0;
}
int ShaderResourceBindingParser::GetVariable( 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);
int ArgStackInd = 1;
// The object itself goes first
auto *pShaderResBinding = *GetUserData<IShaderResourceBinding**>( L, ArgStackInd, m_MetatableRegistryName.c_str() );
// Shader type should be the first argument
++ArgStackInd;
SHADER_TYPE ShaderType = SHADER_TYPE_UNKNOWN;
EnumMemberBinder<SHADER_TYPE> ShaderTypeParser(0, "ShaderType", m_ShaderTypeEnumMapping);
ShaderTypeParser.SetValue(L, ArgStackInd, &ShaderType);
++ArgStackInd;
// Variable name should be the second argument
auto VarName = ReadValueFromLua<String>( L, ArgStackInd );
auto pVar = pShaderResBinding->GetVariable(ShaderType, VarName.c_str());
auto pNewShaderVarLuaObj = reinterpret_cast<IShaderVariable**>(lua_newuserdata( L, sizeof( IShaderVariable* ) ));
*pNewShaderVarLuaObj = pVar;
pVar->AddRef();
// Push onto the stack the metatable associated with name given in the registry
luaL_getmetatable( L, m_ShaderVarMetatableRegistryName.c_str() ); // -0 | +1 -> +1
// Pop a table from the top of the stack and set it as the new metatable
// for the value at the given index (which is where the new user datum is)
lua_setmetatable( L, -2 ); // -1 | +0 -> -1
CHECK_LUA_STACK_HEIGHT( +1 );
return 1;
}
int ShaderResourceBindingParser::InitializeStaticResources( lua_State *L )
{
auto NumArgs = lua_gettop( L );
// The object itself goes first
auto *pShaderResBinding = *GetUserData<IShaderResourceBinding**>( L, 1, m_MetatableRegistryName.c_str() );
IPipelineState* pPSO = nullptr;
if (NumArgs >= 2)
{
pPSO = *GetUserData<IPipelineState**>( L, 2, m_PSOLibMetatableName.c_str() );
}
pShaderResBinding->InitializeStaticResources(pPSO);
return 0;
}
void ShaderResourceBindingParser::GetObjectByName( lua_State *L, const Char *ShaderName, IShaderResourceBinding** ppObject )
{
auto pObject = *GetGlobalObject<IShaderResourceBinding**>( L, ShaderName, m_MetatableRegistryName.c_str() );
*ppObject = pObject;
pObject->AddRef();
}
}
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