/*---------------------------------------------------------------------------*
  Project:  NintendoWare
  File:     gfx_OffScreenBuffer.cpp
  
  Copyright (C)2009-2011 Nintendo/HAL Laboratory, Inc.  All rights reserved.
  
  These coded instructions, statements, and computer programs contain proprietary
  information of Nintendo and/or its licensed developers and are protected by
  national and international copyright laws. They may not be disclosed to third
  parties or copied or duplicated in any form, in whole or in part, without the
  prior written consent of Nintendo.
  
  The content herein is highly confidential and should be handled accordingly.
  
  $Revision: 31311 $
 *---------------------------------------------------------------------------*/

#include "precompiled.h"

#include <nw/gfx/gfx_OffScreenBuffer.h>

#include <nw/os/os_Memory.h>

#include <nn/gx.h>

namespace nw
{
namespace gfx
{
NW_UT_RUNTIME_TYPEINFO_DEFINITION(OffScreenBuffer, IRenderTarget);

//----------------------------------------
OffScreenBuffer::OffScreenBuffer(os::IAllocator* pAllocator, const Description& description, ResPixelBasedTexture resTexture)
: IRenderTarget(pAllocator),
  m_ActivateCommand(NULL),
  m_Description(description),
  m_Texture(resTexture)
{
    ResPixelBasedTexture resPixelBasedTexture = ResStaticCast<ResPixelBasedTexture>(resTexture);

    NW_ASSERT(resPixelBasedTexture.GetTextureObject() != 0);

    m_BackBufferObject.SetHeight( resTexture.GetHeight() );
    m_BackBufferObject.SetWidth( resTexture.GetWidth() );
    
    GLuint format;
    
    switch ( resTexture.GetFormatHW() )
    {
    case ResPixelBasedTexture::FORMAT_HW_RGBA8:    format = GL_RGBA8_OES; break;
    case ResPixelBasedTexture::FORMAT_HW_RGBA5551: format = GL_RGB5_A1; break;
    case ResPixelBasedTexture::FORMAT_HW_RGBA4:    format = GL_RGBA4; break;
    case ResPixelBasedTexture::FORMAT_HW_RGB565:   format = GL_RGB565; break;
    default:
        NW_FATAL_ERROR("illegal texture format for OffScreenBuffer");
    }
    
    m_BackBufferObject.SetColorFormat( format );
    m_BackBufferObject.SetDepthFormat( 0 );

    switch (resTexture.GetTypeInfo())
    {
    case ResImageTexture::TYPE_INFO:
        {
            u32 address = ResStaticCast<ResImageTexture>(resTexture).GetImage().GetImageAddress();
            m_BackBufferObject.SetColorAddress( address );
        }
        break;
    case ResCubeTexture::TYPE_INFO:
        {
            ResCubeTexture::CubeFace face = ResCubeTexture::CUBE_FACE_POSITIVE_X;
            u32 address = ResStaticCast<ResCubeTexture>(resTexture).GetImage( face ).GetImageAddress();
            
            m_BackBufferObject.SetColorAddress( address );
        }
        break;
    case ResShadowTexture::TYPE_INFO:
        {
            u32 address = ResStaticCast<ResShadowTexture>(resTexture).GetImage().GetImageAddress();
            m_BackBufferObject.SetColorAddress( address );
        }
        break;
    default:
        {
            NW_FATAL_ERROR("Unsupported texture type.\n");
        }
        break;
    }
}

//----------------------------------------
OffScreenBuffer::~OffScreenBuffer()
{
}

} // namespace gfx
} // namespace nw