// MosaicView.cpp : implementation of the CMosaicView class
//

#include "stdafx.h"
#include "Mosaic.h"

#include "MosaicDoc.h"
#include "MosaicView.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CMosaicView

IMPLEMENT_DYNCREATE(CMosaicView, CView)

BEGIN_MESSAGE_MAP(CMosaicView, CView)
	//{{AFX_MSG_MAP(CMosaicView)
	ON_COMMAND(ID_VIEW_MOSAIC, OnViewMosaic)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMosaicView construction/destruction

CMosaicView::CMosaicView()
{
	m_hDrawDib=NULL;
	m_hDrawDib=DrawDibOpen();
	HBITMAP hBmp = (HBITMAP)LoadImage( NULL,"bitmap.bmp",IMAGE_BITMAP,0,0,LR_LOADFROMFILE );
	
	HDC hMemDC = CreateCompatibleDC( NULL );
	if (hMemDC)
	{
		// Get bitmap size
		BITMAP bm;
		GetObject(hBmp, sizeof(bm), &bm);
		m_size=CSize(bm.bmWidth,bm.bmHeight);

		// Create a 32 bits depth bitmap and select it into the memory DC 
		BITMAPINFOHEADER RGB32BITSBITMAPINFO=
		{
			sizeof(BITMAPINFOHEADER),bm.bmWidth,bm.bmHeight,
			1,32,BI_RGB,0,0,0,0,0
		};

		m_bmpSrc=CreateDIBSection(hMemDC,(BITMAPINFO *)&RGB32BITSBITMAPINFO,DIB_RGB_COLORS,(VOID **)&m_clrSrc,NULL,0);

		if( m_bmpSrc )
		{
			HBITMAP hOldBmp = (HBITMAP)SelectObject(hMemDC,m_bmpSrc);

			// Create a DC just to copy the bitmap into the memory DC
			HDC hDC = CreateCompatibleDC(hMemDC);
			if (hDC)
			{
				// Copy the bitmap into the memory DC
				HBITMAP hOldBmp2 = (HBITMAP)SelectObject(hDC, hBmp);
				BitBlt(hMemDC, 0, 0, bm.bmWidth, bm.bmHeight, hDC, 0, 0, SRCCOPY);
				SelectObject(hDC, hOldBmp2);
				DeleteDC(hDC);
			}
			SelectObject(hMemDC, hOldBmp);
		}
		DeleteDC(hMemDC);
	}
}

CMosaicView::~CMosaicView()
{
	if( m_hDrawDib != NULL)
	{
		DrawDibClose( m_hDrawDib);
		m_hDrawDib = NULL;
	}

	if( m_bmpSrc != NULL )
		DeleteObject(m_bmpSrc);
}

BOOL CMosaicView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CMosaicView drawing

void CMosaicView::OnDraw(CDC* pDC)
{
	CMosaicDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	
	if( m_hDrawDib != NULL && m_bmpSrc != NULL )
	{
		BITMAPINFOHEADER RGB32BITSBITMAPINFO=
		{
			sizeof(BITMAPINFOHEADER),m_size.cx,m_size.cy,
			1,32,BI_RGB,0,0,0,0,0
		};

		DrawDibRealize( m_hDrawDib, pDC->GetSafeHdc(), TRUE);

		DrawDibDraw( m_hDrawDib,pDC->GetSafeHdc(),10,10,m_size.cx,
			m_size.cy,&RGB32BITSBITMAPINFO,(LPVOID)m_clrSrc,
			0,0,m_size.cx,m_size.cy,DDF_BACKGROUNDPAL);
	}
}

/////////////////////////////////////////////////////////////////////////////
// CMosaicView diagnostics

#ifdef _DEBUG
void CMosaicView::AssertValid() const
{
	CView::AssertValid();
}

void CMosaicView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

CMosaicDoc* CMosaicView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CMosaicDoc)));
	return (CMosaicDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CMosaicView message handlers

void CMosaicView::OnViewMosaic() 
{
	if( m_bmpSrc == NULL || m_hDrawDib == NULL ) return;

	Invalidate();
	int nTileSize=10;//小方塊的大小
	
	int nTileNum=( (m_size.cx+nTileSize-1)/nTileSize )*( (m_size.cy+nTileSize-1)/nTileSize );
	//給紀錄小方塊左上角坐標的POINTS結構數據分配內存
	POINT *pt=new POINT[nTileNum];
	//初始化數據
	int x=0;
	int y=0;
	int i;
	for(i=0;i<nTileNum;i++)
	{
		pt[i].x=x;
		pt[i].y=y;
		x=x+nTileSize;
		if(x>m_size.cx)
		{
			x=0;
			y=y+nTileSize;
		}
	}

	BITMAPINFOHEADER RGB32BITSBITMAPINFO=
		{
			sizeof(BITMAPINFOHEADER),m_size.cx,m_size.cy,
			1,32,BI_RGB,0,0,0,0,0
		};

	CPaintDC dc(this);
	DrawDibRealize( m_hDrawDib, dc.GetSafeHdc(), TRUE);

	//開始隨機顯示小方塊
	double fMax=RAND_MAX;
	for(i=nTileNum-1;i>=0;i--)
	{
		int n=(int) ((double)nTileNum*rand()/fMax);
		x=pt[n].x;
		y=pt[n].y;

		DrawDibDraw( m_hDrawDib,dc.GetSafeHdc(),10+x,10+y,nTileSize,
			nTileSize,&RGB32BITSBITMAPINFO,(LPVOID)m_clrSrc,
			x,y,nTileSize,nTileSize,DDF_BACKGROUNDPAL);
		pt[n].x=pt[i].x;
		pt[n].y=pt[i].y;
		Sleep(20);
	}
	delete[] pt;//釋放內存

	DrawDibDraw( m_hDrawDib,dc.GetSafeHdc(),10,10,m_size.cx,
		m_size.cy,&RGB32BITSBITMAPINFO,(LPVOID)m_clrSrc,
		0,0,m_size.cx,m_size.cy,DDF_BACKGROUNDPAL);
}