www.pudn.com > SobelKirsch.rar > ImageProcess.cpp

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// 
///////////////////////////////////////////////////////////////////////////////// 
// 
//	ImageProcess.cpp: implementation of the CImageProcess class. 
// 
//////////////////////////////////////////////////////////////////////////////// 
// 版权所有(2002) 
// Copyright(2002) 
// 编写者: 向世明 
// Author: Xiang Shiming 
 
#include "stdafx.h" 
#include "ImageProcess.h" 
 
////////////////////////////////////////////////////////////////////// 
// Construction/Destruction 
////////////////////////////////////////////////////////////////////// 
 
IMPLEMENT_DYNAMIC(CImageProcess,  CObject) 
CImageProcess::CImageProcess() 
{ 
	m_dwOperation = 0L;	//缺省 
	m_dwColorModel = IMAGE_COLOR_RGBA; 
} 
 
CImageProcess::~CImageProcess() 
{ 
 
} 
 
#ifdef _DEBUG 
void CImageProcess::Dump(CDumpContext& dc) const 
{ 
	CObject::Dump(dc); 
} 
 
void CImageProcess::AssertValid() const 
{ 
	CObject::AssertValid(); 
} 
#endif 
 
//设置图像处理操作(虚拟) 
void CImageProcess::SetOperation(DWORD dwOperation) 
{ 
	m_dwOperation = dwOperation; 
} 
 
 
//设置颜色模型 
//注意, 我们将只处理RGBA颜色模型 
void CImageProcess::SetColorModel(DWORD dwColorModel) 
{ 
	m_dwColorModel = dwColorModel; 
} 
 
DWORD CImageProcess::GetColorModel() const 
{ 
	return m_dwColorModel; 
} 
 
DWORD CImageProcess::GetOperation() const 
{ 
	return m_dwOperation; 
} 
 
 
 
//从一个32位无符号整数中获取颜色分量 
BYTE CImageProcess::GetAlpha(DWORD dwRGBA) 
{ 
	//四字节，顺序为A--B--G--R. 
	//如果不是这一顺序, 请按重载该函数 
	return (BYTE)((dwRGBA & 0xFF000000) >> 24); 	 
} 
 
BYTE CImageProcess::GetBlue(DWORD dwRGBA) 
{ 
	return (BYTE)((dwRGBA & 0x000000FF) >> 16); 
} 
 
BYTE CImageProcess::GetGreen(DWORD dwRGBA) 
{ 
	return (BYTE)((dwRGBA & 0x0000FF00) >> 8); 
} 
	 
BYTE CImageProcess::GetRed(DWORD dwRGBA) 
{ 
	return (BYTE)(dwRGBA & 0x00FF0000); 
} 
 
DWORD CImageProcess::PutRGBA(BYTE byRed,  BYTE byGreen,  BYTE byBlue,  BYTE byAlpha) 
{ 
	return ((((DWORD)byAlpha) << 24) |  
		   (((DWORD)byRed) << 16)	| 
		   (((DWORD)byGreen << 8)) | 
		   ((DWORD)byBlue)) ; 
} 
 
DWORD CImageProcess::PutRGB(BYTE byRed,  BYTE byGreen,  BYTE byBlue) 
{ 
	//不透明处理 
	return ( 0xFF000000 |  
		   (((DWORD)byRed) << 16)	| 
		   (((DWORD)byGreen) << 8) | 
		   ((DWORD)byBlue)) ; 
} 
 
//从32位DDB数据直接创建一个DDB对象, 即HBITMAP对象 
HBITMAP CImageProcess::CreateDdb(HDC hDC,  int nWidth,  int nHeight,  const LPBYTE lpbyBits32) 
{ 
	//第一步, 创建一个BITMAPV4HEADER结构 
 
	//分配内存: 
	BYTE* pbyBits = new BYTE[sizeof(BITMAPV4HEADER)]; 
	if(pbyBits == NULL) return NULL; 
	//指向Dib实际像素数据的指针,  
	BITMAPV4HEADER* pbmih = (BITMAPV4HEADER*)pbyBits; 
 
	pbmih->bV4Size = sizeof(BITMAPV4HEADER);	//108 
	pbmih->bV4Width = (LONG)nWidth; 
	pbmih->bV4Height = (LONG)(-nHeight); 
	pbmih->bV4Planes = 1; 
	pbmih->bV4BitCount = 32; 
 
    pbmih->bV4V4Compression = BI_RGB;     
	pbmih->bV4SizeImage = 0; 
	pbmih->bV4XPelsPerMeter = 0;     
	pbmih->bV4YPelsPerMeter = 0; 
	pbmih->bV4ClrUsed = 0;     
	pbmih->bV4ClrImportant = 0; 
  
	//第二步, 创建一个DDB 
	HBITMAP hBitmap = ::CreateDIBitmap(hDC, (BITMAPINFOHEADER*)pbmih, CBM_INIT, lpbyBits32, (BITMAPINFO*)pbmih, DIB_RGB_COLORS); 
 
	delete[] pbyBits; 
	return hBitmap; 
}