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Diffstat (limited to 'RenderScript/src/ViewportParser.cpp')
| -rw-r--r-- | RenderScript/src/ViewportParser.cpp | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/RenderScript/src/ViewportParser.cpp b/RenderScript/src/ViewportParser.cpp new file mode 100644 index 0000000..7afbfe6 --- /dev/null +++ b/RenderScript/src/ViewportParser.cpp @@ -0,0 +1,133 @@ +/* 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 "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; + } +} |