//-----------------------------------------------------------------------------
// File: basic.cpp
//
// Desc: D3D sample showing the basics of DirectX Graphics Programming
// 
// Copyright (c) 1998-2000 Microsoft Corporation. All rights reserved.
// Copyright (c) 1998-2001 wolf@direct3d.net
//-----------------------------------------------------------------------------
#define STRICT
#include <tchar.h>
#include <math.h>
#include <stdio.h>
#include <D3DX8.h>
#include "D3DApp.h"
#include "D3DFont.h"
#include "D3DUtil.h"
#include "DXUtil.h"
#include "resource.h"


// A structure for our custom vertex type
struct CUSTOMVERTEX
{
    FLOAT x, y, z, rhw; // The transformed position for the vertex
    DWORD color;        // The vertex color
};

// Our custom FVF, which describes our custom vertex structure
#define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZRHW|D3DFVF_DIFFUSE)


//-----------------------------------------------------------------------------
// Name: class CMyD3DApplication
// Desc: Application class. The base class (CD3DApplication) provides the 
//       generic functionality needed in all Direct3D samples. CMyD3DApplication 
//       adds functionality specific to this sample program.
//-----------------------------------------------------------------------------
class CMyD3DApplication : public CD3DApplication
{
	LPDIRECT3DVERTEXBUFFER8 m_pVB; // Buffer to hold vertices
    DWORD m_dwSizeofVertices;

    HRESULT ConfirmDevice( D3DCAPS8*, DWORD, D3DFORMAT );

protected:
    HRESULT OneTimeSceneInit();
    HRESULT InitDeviceObjects();
    HRESULT RestoreDeviceObjects();
    HRESULT InvalidateDeviceObjects();
    HRESULT DeleteDeviceObjects();
    HRESULT Render();
    HRESULT FrameMove();
    HRESULT FinalCleanup();


public:
    CMyD3DApplication();
};


//-----------------------------------------------------------------------------
// Name: WinMain()
// Desc: Entry point to the program. Initializes everything, and goes into a
//       message-processing loop. Idle time is used to render the scene.
//-----------------------------------------------------------------------------
INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, INT )
{
    CMyD3DApplication d3dApp;

    if( FAILED( d3dApp.Create( hInst ) ) )
        return 0;

    return d3dApp.Run();
}


//-----------------------------------------------------------------------------
// Name: CMyD3DApplication()
// Desc: Application constructor. Sets attributes for the app.
//-----------------------------------------------------------------------------
CMyD3DApplication::CMyD3DApplication()
{
    m_strWindowTitle  = _T("Basic");
    m_bUseDepthBuffer = FALSE;
	m_pVB = NULL;
}

//-----------------------------------------------------------------------------
// Name: OneTimeSceneInit()
// Desc: Called during initial app startup, this function performs all the
//       permanent initialization.
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::OneTimeSceneInit()
{
   return S_OK;
}

//-----------------------------------------------------------------------------
// Name: FrameMove()
// Desc: Called once per frame, the call is the entry point for animating
//       the scene.
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::FrameMove()
{
    return S_OK;
}

//-----------------------------------------------------------------------------
// Name: Render()
// Desc: Called once per frame, the call is the entry point for 3d
//       rendering. This function sets up render states, clears the
//       viewport, and renders the scene.
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::Render()
{
    // Begin the scene
    if( SUCCEEDED( m_pd3dDevice->BeginScene() ) )
    {
		m_pd3dDevice->SetStreamSource( 0, m_pVB, sizeof(CUSTOMVERTEX) );
		m_pd3dDevice->SetVertexShader( D3DFVF_CUSTOMVERTEX );
	    m_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLEFAN, 0, 2 );

      // End the scene.
      m_pd3dDevice->EndScene();
    }

    return S_OK;
}

//-----------------------------------------------------------------------------
// Name: InitDeviceObjects()
// Desc: Initialize scene objects.
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::InitDeviceObjects()
{
   return S_OK;
}

//-----------------------------------------------------------------------------
// Name: RestoreDeviceObjects()
// Desc: Initialize scene objects.
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::RestoreDeviceObjects()
{
    // Set the transform matrices
    D3DXVECTOR3 vEyePt    = D3DXVECTOR3( 0.0f, 0.0f, 2.0f );
    D3DXVECTOR3 vLookatPt = D3DXVECTOR3( 0.0f, 0.0f, 0.0f );
    D3DXVECTOR3 vUpVec    = D3DXVECTOR3( 0.0f, 1.0f, 0.0f );
    D3DXMATRIX  matWorld, matView, matProj;
    
    D3DXMatrixIdentity( &matWorld );
    D3DXMatrixLookAtLH( &matView, &vEyePt, &vLookatPt, &vUpVec );
    FLOAT fAspect = m_d3dsdBackBuffer.Width / (FLOAT)m_d3dsdBackBuffer.Height;
    D3DXMatrixPerspectiveFovLH( &matProj, D3DX_PI/4, fAspect, 1.0f, 500.0f );
    
    m_pd3dDevice->SetTransform( D3DTS_WORLD,      &matWorld );
    m_pd3dDevice->SetTransform( D3DTS_VIEW,       &matView );
    m_pd3dDevice->SetTransform( D3DTS_PROJECTION, &matProj );

	// fill the vertex buffer with the new data
    D3DVIEWPORT8 vp;
    m_pd3dDevice->GetViewport(&vp);

    // Initialize to render a quad
    CUSTOMVERTEX cvVertices[] =
    {
        {  0.0f,  0.0f, 0.5f, 1.0f, 0xffff0000, }, // x, y, z, rhw, color
		{  (float)vp.Width,  0.0f, 0.5f, 1.0f, 0xffff0000, },
        {  (float)vp.Width, (float)vp.Height, 0.5f, 1.0f, 0xff00ff00, },
        {  0.0f, (float)vp.Height, 0.5f, 1.0f, 0xff00ffff, },
    };

	m_dwSizeofVertices = sizeof(cvVertices);

    // Create the vertex buffer
    if( FAILED( m_pd3dDevice->CreateVertexBuffer( m_dwSizeofVertices,
                                                  0, D3DFVF_CUSTOMVERTEX,
                                                  D3DPOOL_MANAGED, &m_pVB ) ) )
        return E_FAIL;

    VOID* pVertices;
    if( FAILED( m_pVB->Lock( 0, m_dwSizeofVertices, (BYTE**)&pVertices, 0 ) ) )
        return E_FAIL;
    memcpy( pVertices, cvVertices, m_dwSizeofVertices);
    m_pVB->Unlock();
  
   return S_OK;
}

//-----------------------------------------------------------------------------
// Name: InvalidateDeviceObjects()
// Desc: Called when the app is exiting, or the device is being changed,
//       this function deletes any device dependent objects.
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::InvalidateDeviceObjects()
{
    SAFE_RELEASE( m_pVB );
   return S_OK;
}

//-----------------------------------------------------------------------------
// Name: DeleteDeviceObjects()
// Desc: Called when the app is exiting, or the device is being changed,
//       this function deletes any device dependent objects.
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::DeleteDeviceObjects()
{
   return S_OK;
}


//-----------------------------------------------------------------------------
// Name: FinalCleanup()
// Desc: Called before the app exits, this function gives the app the chance
//       to cleanup after itself.
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::FinalCleanup()
{
   return S_OK;
}

//-----------------------------------------------------------------------------
// Name: ConfirmDevice()
// Desc: Called during device intialization, this code checks the device
//       for some minimum set of capabilities
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::ConfirmDevice( D3DCAPS8* pCaps, DWORD dwBehavior, 
                                          D3DFORMAT Format )
{
    return S_OK;
}