www.gusucode.com > VC++将两张位图合并在一起显示-源码程序 > VC++将两张位图合并在一起显示-源码程序\code\DrawImage.cpp

    //
// DIB Section
// Download by http://www.NewXing.com
// Copyright (c) 2000-2001 Chihiro.SAKAMOTO (HyperWorks)
//
#include "StdAfx.h"
#include "DrawImage.h"
#include "dc.h"
#include "Misc.h"

//
// 构造函数
//
CDrawImage::CDrawImage()
:CImage(), hBitmap(0)
{
}

//
// 析构函数
//
CDrawImage::~CDrawImage()
{
	GdiFlush();
	if (hBitmap) {
		::DeleteObject(hBitmap);
	}
}

//
// 生成DIB section
//
BOOL CDrawImage::Create(HDC dc, int width, int height)
{
	W = width;
	H = height;
	D = 24;
	
	bytes_per_line = ScanBytes(width, 24);
	bytes_per_pixel = PixelBytes(24);
	
	InfoHeader.biSize = sizeof(BITMAPINFOHEADER);
	InfoHeader.biWidth = width;
	InfoHeader.biHeight = height;
	InfoHeader.biBitCount = 24;
	InfoHeader.biPlanes = 1;
	InfoHeader.biXPelsPerMeter = 0;
	InfoHeader.biYPelsPerMeter = 0;
	InfoHeader.biClrUsed = 0;
	InfoHeader.biClrImportant = 0;
	InfoHeader.biCompression = BI_RGB;
	InfoHeader.biSizeImage = bytes_per_line * height;
	
	Info = (BITMAPINFO *)&InfoHeader;
	hBitmap = CreateDIBSection(dc, Info, DIB_RGB_COLORS, &Bits, NULL, 0);
	
	return hBitmap != 0;
}