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/* Copyright 2015 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 "LayoutDescParser.h"
namespace std
{
DEFINE_ENUM_HASH( Diligent::LayoutElement::FREQUENCY )
}
namespace Diligent
{
const Char* LayoutDescParser::LayoutDescLibName = "LayoutDesc";
class LayoutElementLoader; // Used only as a template switch
template<>
class MemberBinder<LayoutElementLoader> : public MemberBinderBase
{
public:
MemberBinder( size_t LayoutElementsOffset, size_t ElementsBufferOffset, size_t NumElementsOffset ) :
MemberBinderBase( ElementsBufferOffset ),
m_LayoutElementsOffset(LayoutElementsOffset),
m_NumElementsOffset(NumElementsOffset)
{
DEFINE_BINDER( m_Bindings, LayoutElement, InputIndex, Uint32, Validator<Uint32>( "Input Index", 0, 32 ) )
DEFINE_BINDER( m_Bindings, LayoutElement, BufferSlot, Uint32, Validator<Uint32>( "Buffer Slot", 0, MaxBufferSlots ) )
DEFINE_BINDER( m_Bindings, LayoutElement, NumComponents, Uint32, Validator<Uint32>( "Num Components", 1, 4 ) )
DEFINE_ENUM_BINDER( m_Bindings, LayoutElement, ValueType, VALUE_TYPE, m_ValueTypeEnumMapping )
DEFINE_BINDER( m_Bindings, LayoutElement, IsNormalized, Bool, Validator<Bool>() )
DEFINE_BINDER( m_Bindings, LayoutElement, RelativeOffset, Uint32, Validator<Uint32>() )
m_FrequencyEnumMapping.AddMapping( "FREQUENCY_PER_VERTEX", LayoutElement::FREQUENCY_PER_VERTEX );
m_FrequencyEnumMapping.AddMapping( "FREQUENCY_PER_INSTANCE", LayoutElement::FREQUENCY_PER_INSTANCE );
VERIFY( m_FrequencyEnumMapping.m_Str2ValMap.size() == LayoutElement::FREQUENCY_NUM_FREQUENCIES - 1,
"Unexpected map size. Did you update LayoutElement::FREQUENCY_PER_VERTEX enum?" );
VERIFY( m_FrequencyEnumMapping.m_Val2StrMap.size() == LayoutElement::FREQUENCY_NUM_FREQUENCIES - 1,
"Unexpected map size. Did you update LayoutElement::FREQUENCY_PER_VERTEX enum?" );
DEFINE_ENUM_BINDER( m_Bindings, LayoutElement, Frequency, LayoutElement::FREQUENCY, m_FrequencyEnumMapping )
DEFINE_BINDER( m_Bindings, LayoutElement, InstanceDataStepRate, Uint32, Validator<Uint32>() )
}
virtual void GetValue( lua_State *L, const void* pBasePointer )
{
// Use raw pointer to push the value to Lua because the buffer
// most likely does not exist
const auto *Elements = GetMemberByOffest<const LayoutElement*>(pBasePointer, m_LayoutElementsOffset);
const auto &NumElements = GetMemberByOffest< Uint32 >( pBasePointer, m_NumElementsOffset );
PushLuaArray( L, Elements, Elements + NumElements, [&]( const LayoutElement &Elem )
{
PushLuaTable( L, &Elem, m_Bindings );
}
);
}
virtual void SetValue( lua_State *L, int Index, void* pBasePointer )
{
ParseLuaArray( L, Index, pBasePointer, [&]( void* _pBasePointer, int StackIndex, int NewArrayIndex )
{
VERIFY( pBasePointer == _pBasePointer, "Sanity check failed" );
auto &Elements = GetMemberByOffest<std::vector<LayoutElement> >( pBasePointer, m_MemberOffset );
auto CurrIndex = Elements.size();
if( CurrIndex != NewArrayIndex - 1 )
SCRIPT_PARSING_ERROR( L, "Explicit array indices are not allowed in layout description. Provided index ", NewArrayIndex - 1, " conflicts with actual index ", CurrIndex, "." );
Elements.resize( CurrIndex + 1 );
ParseLuaTable( L, StackIndex, &(Elements)[CurrIndex], m_Bindings );
if( Elements[CurrIndex].ValueType == VT_UNDEFINED )
SCRIPT_PARSING_ERROR( L, "Valid value type must be specified for layout element #", CurrIndex );
}
);
auto &ElementsBuffer = GetMemberByOffest<std::vector<LayoutElement> >( pBasePointer, m_MemberOffset );
auto &LayoutElements = GetMemberByOffest< LayoutElement* >( pBasePointer, m_LayoutElementsOffset );
auto &NumElements = GetMemberByOffest< Uint32 >( pBasePointer, m_NumElementsOffset );
LayoutElements = ElementsBuffer.data();
NumElements = static_cast<Uint32>( ElementsBuffer.size() );
}
private:
BindingsMapType m_Bindings;
ValueTypeEnumMapping m_ValueTypeEnumMapping;
EnumMapping < LayoutElement::FREQUENCY > m_FrequencyEnumMapping;
size_t m_LayoutElementsOffset;
size_t m_NumElementsOffset;
};
LayoutDescParser::LayoutDescParser( IRenderDevice *pRenderDevice, lua_State *L ) :
EngineObjectParserCommon<IVertexDescription>( pRenderDevice, L, LayoutDescLibName ),
m_SetInputLayoutBinding( this, L, "Context", "SetInputLayout", &LayoutDescParser::SetInputLayout )
{
DEFINE_BUFFERED_STRING_BINDER( m_Bindings, LayoutDescWrapper, Name, NameBuffer )
auto *pLayoutElemBinder =
new MemberBinder<LayoutElementLoader>(
offsetof(LayoutDescWrapper, LayoutElements),
offsetof(LayoutDescWrapper, ElementsBuffer),
offsetof(LayoutDescWrapper, NumElements)
);
m_Bindings.insert( std::make_pair( "LayoutElements", std::unique_ptr<MemberBinderBase>(pLayoutElemBinder) ) );
};
void LayoutDescParser::CreateObj( lua_State *L )
{
INIT_LUA_STACK_TRACKING( L );
LayoutDescWrapper LayoutDesc;
ParseLuaTable( L, -2, &LayoutDesc, m_Bindings );
CHECK_LUA_STACK_HEIGHT();
auto ppVertexShader = GetUserData<IShader**>( L, -1, "Metatables.Shader" );
auto ppVertDesc = reinterpret_cast<IVertexDescription**>(lua_newuserdata( L, sizeof( IVertexDescription* ) ));
*ppVertDesc = nullptr;
m_pRenderDevice->CreateVertexDescription( LayoutDesc, *ppVertexShader, ppVertDesc );
if( *ppVertDesc == nullptr )
SCRIPT_PARSING_ERROR(L, "Failed to create vertex description")
CHECK_LUA_STACK_HEIGHT( +1 );
}
int LayoutDescParser::SetInputLayout( lua_State *L )
{
auto pVertDesc = *GetUserData<IVertexDescription**>( L, 1, m_MetatableRegistryName.c_str() );
auto *pContext = LoadDeviceContextFromRegistry( L );
pContext->SetVertexDescription( pVertDesc );
return 0;
}
}
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