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/* Copyright 2015-2018 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 "ViewportParser.h"
namespace Diligent
{
const Char* ViewportParser::ViewportLibName = "Viewport";
ViewportParser::ViewportParser( IRenderDevice *pRenderDevice, lua_State *L ) :
EngineObjectParserBase( pRenderDevice, L, ViewportLibName ),
m_SetViewportsBinding( this, L, "Context", "SetViewports", &ViewportParser::SetViewports )
{
m_Viewports.reserve( 8 );
// NumVertices and NumIndices are in Union
DEFINE_BINDER( m_Bindings, Viewport, TopLeftX, Float32, Validator<Float32>() )
DEFINE_BINDER( m_Bindings, Viewport, TopLeftY, Float32, Validator<Float32>() )
DEFINE_BINDER( m_Bindings, Viewport, Width, Float32, Validator<Float32>() )
DEFINE_BINDER( m_Bindings, Viewport, Height, Float32, Validator<Float32>() )
DEFINE_BINDER( m_Bindings, Viewport, MinDepth, Float32, Validator<Float32>() )
DEFINE_BINDER( m_Bindings, Viewport, MaxDepth, Float32, Validator<Float32>() )
};
void ViewportParser::CreateObj( lua_State *L )
{
INIT_LUA_STACK_TRACKING(L);
Viewport VP;
ParseLuaTable( L, 1, &VP, m_Bindings );
if( VP.Width < 0 )
SCRIPT_PARSING_ERROR( L, "VP width (", VP.Width, ") cannot be negative" );
if( VP.Height < 0 )
SCRIPT_PARSING_ERROR( L, "VP height (", VP.Height, ") cannot be negative" );
if( VP.MinDepth > VP.MaxDepth )
SCRIPT_PARSING_ERROR( L, "VP depth range (", VP.MinDepth, ", ", VP.MaxDepth, ") is incorrect" );
CHECK_LUA_STACK_HEIGHT();
auto pViewport = reinterpret_cast<Viewport*>(lua_newuserdata( L, sizeof( Viewport ) ));
memcpy(pViewport, &VP, sizeof(Viewport));
CHECK_LUA_STACK_HEIGHT( +1 );
}
void ViewportParser::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 ViewportParser::ReadField( lua_State *L, void *pData, const Char *Field )
{
auto pViewport = reinterpret_cast<Viewport*>(pData);
PushField( L, pViewport, Field, m_Bindings );
}
void ViewportParser::UpdateField( lua_State *L, void *pData, const Char *Field )
{
auto pViewport = reinterpret_cast<Viewport*>(pData);
Diligent::UpdateField( L, -1, pViewport, Field, m_Bindings );
}
void ViewportParser::PushExistingObject( lua_State *L, const void *pObject )
{
auto pViewport = reinterpret_cast<Viewport*>(lua_newuserdata( L, sizeof( Viewport ) ));
memcpy( pViewport, pObject, sizeof( Viewport ) );
}
int ViewportParser::SetViewports( lua_State *L )
{
auto *pContext = LoadDeviceContextFromRegistry( L );
auto NumArgs = lua_gettop( L );
if( NumArgs == 0 )
pContext->SetViewports( 1, nullptr, 0, 0 );
else
{
Uint32 RTWidth = 0;
Uint32 RTHeight = 0;
m_Viewports.clear();
for( int Arg = 1; Arg <= NumArgs; ++Arg )
{
if( lua_type( L, Arg ) == LUA_TUSERDATA )
{
auto pViewport = GetUserData<Viewport*>( L, Arg, m_MetatableRegistryName.c_str() );
m_Viewports.emplace_back( *pViewport );
}
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 NumViewports = static_cast<Uint32>( m_Viewports.size() );
if( NumViewports == 0 )
SCRIPT_PARSING_ERROR( L, "At least one viewport must be specified" );
pContext->SetViewports( NumViewports, m_Viewports.data(), RTWidth, RTHeight );
}
return 0;
}
}
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