/*     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 "RasterizerStateParser.h"


namespace Diligent
{
    const Char* RasterizerStateParser::RasterizerStateLibName = "RasterizerState";

    RasterizerStateParser::RasterizerStateParser( IRenderDevice *pRenderDevice, lua_State *L ) :
        EngineObjectParserCommon<IRasterizerState>( pRenderDevice, L, RasterizerStateLibName ),
        m_SetRasterizerBinding( this, L, "Context", "SetRasterizerState", &RasterizerStateParser::SetRasterizerState )
    {
        DEFINE_BUFFERED_STRING_BINDER( m_Bindings, SRSDescWrapper, Name, NameBuffer )

        DEFINE_ENUM_ELEMENT_MAPPING( m_FillModeEnumMapping, FILL_MODE_WIREFRAME );
        DEFINE_ENUM_ELEMENT_MAPPING( m_FillModeEnumMapping, FILL_MODE_SOLID );
        VERIFY( m_FillModeEnumMapping.m_Str2ValMap.size() == FILL_MODE_NUM_MODES-1,
                "Unexpected map size. Did you update FILL_MODE enum?" );
        VERIFY( m_FillModeEnumMapping.m_Val2StrMap.size() == FILL_MODE_NUM_MODES-1,
                "Unexpected map size. Did you update FILL_MODE enum?" );
        DEFINE_ENUM_BINDER( m_Bindings, SRSDescWrapper, FillMode, FILL_MODE, m_FillModeEnumMapping );

        DEFINE_ENUM_ELEMENT_MAPPING( m_CullModeEnumMapping, CULL_MODE_NONE );
        DEFINE_ENUM_ELEMENT_MAPPING( m_CullModeEnumMapping, CULL_MODE_FRONT );
        DEFINE_ENUM_ELEMENT_MAPPING( m_CullModeEnumMapping, CULL_MODE_BACK );
        VERIFY( m_CullModeEnumMapping.m_Str2ValMap.size() == CULL_MODE_NUM_MODES-1,
                "Unexpected map size. Did you update CULL_MODE enum?" );
        VERIFY( m_CullModeEnumMapping.m_Val2StrMap.size() == CULL_MODE_NUM_MODES-1,
                "Unexpected map size. Did you update CULL_MODE enum?" );
        DEFINE_ENUM_BINDER( m_Bindings, SRSDescWrapper, CullMode, CULL_MODE, m_CullModeEnumMapping );

        DEFINE_BINDER( m_Bindings, SRSDescWrapper, FrontCounterClockwise, Bool,    Validator<Bool>() );
        DEFINE_BINDER( m_Bindings, SRSDescWrapper, DepthBias,             Int32,   Validator<Int32>() );
        DEFINE_BINDER( m_Bindings, SRSDescWrapper, DepthBiasClamp,        Float32, Validator<Float32>() );
        DEFINE_BINDER( m_Bindings, SRSDescWrapper, SlopeScaledDepthBias,  Float32, Validator<Float32>() );
        DEFINE_BINDER( m_Bindings, SRSDescWrapper, DepthClipEnable,       Bool,    Validator<Bool>() );
        DEFINE_BINDER( m_Bindings, SRSDescWrapper, ScissorEnable,         Bool,    Validator<Bool>() );
        DEFINE_BINDER( m_Bindings, SRSDescWrapper, AntialiasedLineEnable, Bool,    Validator<Bool>() );
    };

    void RasterizerStateParser::CreateObj( lua_State *L )
    {
        INIT_LUA_STACK_TRACKING( L );

        SRSDescWrapper RasterizerDesc;
        ParseLuaTable( L, 1, &RasterizerDesc, m_Bindings );

        CHECK_LUA_STACK_HEIGHT();

        auto ppRasterizerState = reinterpret_cast<IRasterizerState**>(lua_newuserdata( L, sizeof( IRasterizerState* ) ));
        *ppRasterizerState = nullptr;
        m_pRenderDevice->CreateRasterizerState( RasterizerDesc, ppRasterizerState );
        if( *ppRasterizerState == nullptr )
            SCRIPT_PARSING_ERROR(L, "Failed to create rasterizer state")

        CHECK_LUA_STACK_HEIGHT( +1 );
    }

    int RasterizerStateParser::SetRasterizerState( lua_State *L )
    {
        auto *pRS = *GetUserData<IRasterizerState**>( L, 1, m_MetatableRegistryName.c_str() );
        auto *pContext = LoadDeviceContextFromRegistry( L );
        pContext->SetRasterizerState( pRS );
        return 0;
    }
}