// Form2.cpp : implementation file
//

#include "stdafx.h"
#include "DN_sample.h"
#include "Form2.h"


// CForm2 dialog

IMPLEMENT_DYNAMIC(CForm2, CDialog)

CForm2::CForm2(CWnd* pParent /*=NULL*/)
	: CDialog(CForm2::IDD, pParent),hb(0)
	, m_img(nullptr)
	, m_type(0)
{
	Create(IDD,pParent);

}

CForm2::~CForm2()
{
}

void CForm2::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//DDX_Control(pDX, IDC_LIST1, m_listbox);
}


BEGIN_MESSAGE_MAP(CForm2, CDialog)
	ON_WM_PAINT()
	//ON_LBN_SELCHANGE(IDC_LIST1, &CForm2::OnLbnSelchangeList1)

END_MESSAGE_MAP()


BOOL CForm2::OnInitDialog()
{
	CDialog::OnInitDialog();

	ModifyStyle(WS_CAPTION, 0);

	return true;
}

// CForm2 message handlers

void CForm2::OnPaint()
{	
	//CDialog::OnPaint();
	ShowImage();

	CPaintDC dc(this); // device context for painting

	// 绘制边界线
	CRect rectClient;
	GetClientRect(&rectClient);

	dc.DrawEdge(rectClient, EDGE_ETCHED, BF_RECT);

}



void CForm2::ShowOriginImg(MicroImage* img) {
	m_img = img;
	m_type = 0;
	ShowImage();
}

void CForm2::ShowCalImg(MicroImage* img) {
	m_img = img;
	m_type = 1;
	ShowImage();
}


void CForm2::ShowImage() {

	if (m_type > 1 || !m_img) return;
	if (m_type == 0 && !m_img->m_OriginData) return;
	if (m_type == 1 && !m_img->m_CalData) return;


	if (!hb) {
		BITMAPINFOHEADER bih = { 0 };
		bih.biSize = sizeof(BITMAPINFOHEADER);
		bih.biWidth = m_img->m_width;
		bih.biHeight = -m_img->m_height; // 负数表示图像是顶部向下的  
		bih.biPlanes = 1;
		bih.biBitCount = 24; // RGB  
		bih.biCompression = BI_RGB;
		bih.biSizeImage = m_img->m_width * m_img->m_height * 3; // 每个像素3字节  

		// 分配内存给BITMAPINFO  
		BITMAPINFO* bmi = (BITMAPINFO*)malloc(sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * 256); // 假设有256种颜色，但对于24位RGB不需要RGBQUAD数组  
		memcpy(&bmi->bmiHeader, &bih, sizeof(BITMAPINFOHEADER));

		CDC* pDC = GetDC();
		uchar* data = (m_type == 0) ? m_img->m_OriginData : m_img->m_CalData;
		hb = CreateDIBitmap(pDC->m_hDC, &bih, CBM_INIT, data, bmi, DIB_RGB_COLORS);
		pDC->Detach();
		ReleaseDC(pDC);

		free(bmi);
	}

	GetClientRect(&r1);
	CPaintDC dc(this);
	BITMAP b;
	GetObject(hb, sizeof(b), &b);
	CDC cdc;
	cdc.CreateCompatibleDC(0);
	HGDIOBJ o = cdc.SelectObject(hb);
	SetStretchBltMode(dc, STRETCH_HALFTONE);
	dc.StretchBlt(0, 0, r1.right - r1.left, r1.bottom - r1.top, &cdc, 0, 0, b.bmWidth, b.bmHeight, SRCCOPY);
	cdc.SelectObject(o);
	cdc.DeleteDC();
	ReleaseDC(&cdc);
}


void CForm2::ClearImg() {
	if (hb != NULL) {
		DeleteObject(hb);
		hb = NULL;
	}
}