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/* Copyright 2015-2016 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 "ScissorRectParser.h"
namespace Diligent
{
const Char* ScissorRectParser::ScissorRectLibName = "ScissorRect";
ScissorRectParser::ScissorRectParser( IRenderDevice *pRenderDevice, lua_State *L ) :
EngineObjectParserBase( pRenderDevice, L, ScissorRectLibName ),
m_SetScissorRectsBinding( this, L, "Context", "SetScissorRects", &ScissorRectParser::SetScissorRects )
{
m_ScissorRects.reserve( 8 );
// NumVertices and NumIndices are in Union
DEFINE_BINDER( m_Bindings, Rect, left, Int32, Validator<Int32>() )
DEFINE_BINDER( m_Bindings, Rect, top, Int32, Validator<Int32>() )
DEFINE_BINDER( m_Bindings, Rect, right, Int32, Validator<Int32>() )
DEFINE_BINDER( m_Bindings, Rect, bottom, Int32, Validator<Int32>() )
};
void ScissorRectParser::CreateObj( lua_State *L )
{
INIT_LUA_STACK_TRACKING(L);
Rect ScissorRect;
ParseLuaTable( L, 1, &ScissorRect, m_Bindings );
if( ScissorRect.left > ScissorRect.right )
SCRIPT_PARSING_ERROR(L, "Scissor rect left and right boundaries (", ScissorRect.left, ", ", ScissorRect.right, ") are incorrect")
if( ScissorRect.top > ScissorRect.bottom )
SCRIPT_PARSING_ERROR(L, "Scissor rect top and bottom boundaries (", ScissorRect.top, ", ", ScissorRect.bottom, ") are incorrect")
CHECK_LUA_STACK_HEIGHT();
auto pScissorRect = reinterpret_cast<Rect*>(lua_newuserdata( L, sizeof( Rect ) ));
memcpy(pScissorRect, &ScissorRect, sizeof(ScissorRect));
CHECK_LUA_STACK_HEIGHT( +1 );
}
void ScissorRectParser::DestroyObj( void *pData )
{
// We do not need to do anything, because the whole object is
// created as full user data and thus managed by Lua
}
void ScissorRectParser::ReadField( lua_State *L, void *pData, const Char *Field )
{
auto pScissorRect = reinterpret_cast<Rect*>(pData);
PushField( L, pScissorRect, Field, m_Bindings );
}
void ScissorRectParser::UpdateField( lua_State *L, void *pData, const Char *Field )
{
auto pScissorRect = reinterpret_cast<Rect*>(pData);
Diligent::UpdateField( L, -1, pScissorRect, Field, m_Bindings );
}
void ScissorRectParser::PushExistingObject( lua_State *L, const void *pObject )
{
auto pScissorRect = reinterpret_cast<Rect*>(lua_newuserdata( L, sizeof( Rect ) ));
memcpy( pScissorRect, pObject, sizeof( Rect ) );
}
int ScissorRectParser::SetScissorRects( lua_State *L )
{
auto NumArgs = lua_gettop( L );
Uint32 RTWidth = 0;
Uint32 RTHeight = 0;
m_ScissorRects.clear();
for( int Arg = 1; Arg <= NumArgs; ++Arg )
{
if( lua_type( L, Arg ) == LUA_TUSERDATA )
{
auto pScissorRect = GetUserData<Rect*>( L, Arg, m_MetatableRegistryName.c_str() );
m_ScissorRects.emplace_back( *pScissorRect );
}
else
{
if( RTWidth == 0 )
RTWidth = ReadValueFromLua<Uint32>( L, Arg );
else if( RTHeight == 0 )
RTHeight = ReadValueFromLua<Uint32>( L, Arg );
else
SCRIPT_PARSING_ERROR( L, "Render target size already specified (", RTWidth, "x", RTHeight, ")." );
}
}
if( RTWidth == 0 && RTHeight != 0 || RTWidth != 0 && RTHeight == 0 )
SCRIPT_PARSING_ERROR( L, "Render target size is incomplete (", RTWidth, "x", RTHeight, "). Use either 0x0 or fully specified size" );
Uint32 NumScissorRects = static_cast<Uint32>( m_ScissorRects.size() );
if( NumScissorRects == 0 )
SCRIPT_PARSING_ERROR( L, "At least one viewport must be specified" );
auto *pContext = LoadDeviceContextFromRegistry( L );
pContext->SetScissorRects( NumScissorRects, m_ScissorRects.data(), RTWidth, RTHeight );
return 0;
}
}
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