imabmp.cpp

一套图像处理程序,支持三种图像文件格式,我调试过了,很好用

/*
 * File:	wbimage.cc
 * Purpose:	Platform Independent Image Base Class (Windows version)
 * Author:	Alejandro Aguilar Sierra
 * Created:	1995
 * Copyright:	(c) 1995 Alejandro Aguilar Sierra <[e-mail]>
 */
#include "imabmp.h"

#if CIMAGE_SUPPORT_BMP
#include "dibutils.h"

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

CImageBMP::CImageBMP( const CBitmap* bmp)
{
  bgindex = -1;
  lpbi = 0;
  RawImage = 0;
  imagePalette = 0;
  if (bmp) {
         
      BITMAP bm;
	  HBITMAP hBitmap = (HBITMAP)(bmp->GetSafeHandle());
      GetObject(hBitmap, sizeof(BITMAP), (LPSTR) &bm);
      int width = bm.bmWidth;
      int height = bm.bmHeight;
//      int depth = bm.bmPlanes;
	  int depth = bm.bmBitsPixel;
      Create(width, height, depth);
      HDC dc = ::GetDC(NULL);
      if (GetDIBits(dc, hBitmap, 0, GetHeight(),
		RawImage, (LPBITMAPINFO)lpbi, DIB_RGB_COLORS) == 0)
      {
        TRACE0("GetDIBits failed");       
      }
      ::ReleaseDC(NULL, dc);
  }
}

BOOL CImageBMP::ReadFile(const CString& imageFileName)
{
  if (imageFileName != "")
	 filename = imageFileName;

  if (lpbi = DibOpenFile((char *)(const char *)filename))  {
		Width =  DibWidth(lpbi);
		Height = DibHeight(lpbi);
		Depth = DibBitCount(lpbi);
		RawImage = (ImagePointerType)DibPtr(lpbi);
		EffWidth = (long)(((long)Width*Depth + 31) / 32) * 4;
		HPALETTE palette;
		if (palette = MakePalette((const BITMAPINFO FAR*)lpbi, 0))
		{
		  imagePalette = new CImagePalette;
		  imagePalette->Attach(palette);
		  DibSetUsage(lpbi, (HPALETTE) (*imagePalette), CIMAGE_COLORS);
		  ColorType = (COLORTYPE_PALETTE | COLORTYPE_COLOR);
		} 

		return TRUE;
  }
  return FALSE;
}


BOOL CImageBMP::SaveFile(const CString& imageFileName)
{                         
  if (imageFileName != "")
	 filename = imageFileName;

  HPALETTE hPal = 0;
  if (imagePalette)
    hPal = (HPALETTE) (*imagePalette);
    
  DibSetUsage(lpbi, hPal, DIB_RGB_COLORS);
//  DibSetUsage(lpbi, hPal, DIB_PAL_COLORS);

  return WriteDIB((const char *)imageFileName, lpbi);
/*
//  return WriteDIB(ImageFileName, HandleFromDib(lpbi));
  // This was the original code used in wxImage, but the resulting
  // file isn't a valid BMP file.
  DibSetUsage(lpbi, (HPALETTE) (*imagePalette), DIB_RGB_COLORS);
  if (!DibWriteFile((char *)(const char *)filename, lpbi))
	return FALSE;
	else return TRUE;
*/
}

#endif 	// CIMAGE_SUPPORT_BMP