www.pudn.com > source5.rar > colorope.c
//////////////////////////////////////////////////////////////
//Name:colorope.c
//Purpose: histogram and color operation
//Author: phoenix, CS, TshingHua, Beijing, P.R.C.
//Email: bjlufengjun@www.163.net or lufengjun@hotmail.com
//Date:April 3, 1998
//header file
#include "bmp.h"
#include "memory.h"
#include "math.h"
#include "stdio.h"
//macro definition
#define WIDTHBYTES(i) ((i+31)/32*4)
//function declaration
int PASCAL WinMain (HANDLE, HANDLE, LPSTR, int);
LRESULT CALLBACK MainWndProc(HWND , UINT,WPARAM, LPARAM);
BOOL LoadBmpFile (HWND hWnd,char *BmpFileName);
BOOL CALLBACK InputBox( HWND hDlg, UINT message,WPARAM wParam, LPARAM lParam );
BOOL Histogram(HWND hWnd);
long FAR PASCAL PopupWndProc (HWND,UINT,WPARAM,LPARAM);
BOOL ColortoGrayScale(HWND hWnd);
BOOL Trueto256(HWND hWnd);
BOOL Invert(HWND hWnd);
BOOL ContrastStretch(HWND hWnd);
BOOL Cliping(HWND hWnd);
BOOL Thresholding(HWND hWnd);
BOOL Slice(HWND hWnd,BOOL WithBack);
BOOL HistogramEqua(HWND hWnd);
//global variable declaration
BITMAPFILEHEADER bf;
BITMAPINFOHEADER bi;
HPALETTE hPalette=NULL;
HBITMAP hBitmap=NULL;
HGLOBAL hImgData=NULL;
DWORD NumColors;
DWORD LineBytes;
HINSTANCE ghInst;
DWORD ImgWidth=0 , ImgHeight=0;
int GrayTable[256];
int MaxGrayNum;
int MinGrayNum;
int FirstPoint=0, SecondPoint=255;
float StretchRatio=2.0f;
int EquaScale;
///////////////////////////////////////////////////////////
int PASCAL WinMain (HANDLE hInstance, HANDLE hPrevInstance,
LPSTR lpszCmdLine, int nCmdShow)
{
MSG msg;
WNDCLASS wndclass;
HWND hWnd;
ghInst=hInstance;
if ( ! hPrevInstance ){
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = MainWndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION);
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW);
wndclass.hbrBackground = GetStockObject (WHITE_BRUSH);
wndclass.lpszMenuName = "BMPMENU";
wndclass.lpszClassName = "phoenix ip system";
}
if ( ! RegisterClass (&wndclass) )
return FALSE;
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = PopupWndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = ghInst;
wndclass.hIcon = NULL;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW);
wndclass.hbrBackground = GetStockObject (WHITE_BRUSH);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = "PopupWindowClass";
if ( ! RegisterClass (&wndclass) )
return FALSE;
hWnd = CreateWindow ("phoenix ip system","Color Operation",
WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT, NULL,NULL,
hInstance, NULL);
if (!hWnd)
return FALSE;
ShowWindow (hWnd, SW_SHOWMAXIMIZED);
UpdateWindow (hWnd);
while ( GetMessage (&msg, NULL, 0, 0) ){
TranslateMessage (&msg);
DispatchMessage (&msg);
}
return msg.wParam;
}
////////////////////////////////////////////////////////////////
LRESULT CALLBACK MainWndProc(HWND hWnd, UINT message,WPARAM wParam, LPARAM lParam)
{
static HDC hDC,hMemDC;
PAINTSTRUCT ps;
switch (message){
case WM_PAINT:
{
hDC = BeginPaint(hWnd, &ps);
if (hBitmap)
{
hMemDC = CreateCompatibleDC(hDC);
if (hPalette)
{
SelectPalette (hDC, hPalette, FALSE);
SelectPalette (hMemDC, hPalette, FALSE);
RealizePalette (hDC);
}
SelectObject(hMemDC, hBitmap);
BitBlt(hDC, 0, 0, ImgWidth,ImgHeight, hMemDC, 0, 0, SRCCOPY);
DeleteDC(hMemDC);
}
EndPaint(hWnd, &ps);
break;
}
case WM_DESTROY: //注意释放内存和位图，调色板句柄
if(hBitmap!=NULL)
DeleteObject(hBitmap);
if(hPalette!=NULL)
DeleteObject(hPalette);
if(hImgData!=NULL){
GlobalUnlock(hImgData);
GlobalFree(hImgData);
}
PostQuitMessage (0);
return 0;
case WM_COMMAND:
switch (wParam){
case IDM_LOADBMP:
//注意重新分配内存和调色板，位图句柄时，先释放原来的
if(hBitmap!=NULL){
DeleteObject(hBitmap);
hBitmap=NULL;
}
if(hPalette!=NULL){
DeleteObject(hPalette);
hPalette=NULL;
}
if(hImgData!=NULL){
GlobalUnlock(hImgData);
GlobalFree(hImgData);
hImgData=NULL;
}
if(LoadBmpFile(hWnd,"c:\\test.bmp")) //成功，则重画窗口
InvalidateRect(hWnd,NULL,TRUE);
break;
case IDM_HISTOGRAM:
if(hImgData!=NULL){
if(Histogram(hWnd))
InvalidateRect(hWnd,NULL,TRUE);
}
else
MessageBox(hWnd,"File not loaded yet!","Error Message",MB_OK|MB_ICONEXCLAMATION);
break;
case IDM_TRUE256:
if(hImgData!=NULL){
if(Trueto256(hWnd))
InvalidateRect(hWnd,NULL,TRUE);
}
else
MessageBox(hWnd,"File not loaded yet!","Error Message",MB_OK|MB_ICONEXCLAMATION);
break;
case IDM_CLRGRAY:
if(hImgData!=NULL){
if(ColortoGrayScale(hWnd))
InvalidateRect(hWnd,NULL,TRUE);
}
else
MessageBox(hWnd,"File not loaded yet!","Error Message",MB_OK|MB_ICONEXCLAMATION);
break;
case IDM_INVERT:
if(hImgData!=NULL){
if(Invert(hWnd))
InvalidateRect(hWnd,NULL,TRUE);
}
else
MessageBox(hWnd,"File not loaded yet!","Error Message",MB_OK|MB_ICONEXCLAMATION);
break;
case IDM_CONTSTRETCH:
if(hImgData!=NULL){
if (ContrastStretch(hWnd))
InvalidateRect(hWnd,NULL,TRUE);
}
else
MessageBox(hWnd,"File not loaded yet!","Error Message",MB_OK|MB_ICONEXCLAMATION);
break;
case IDM_CLIPING:
if(hImgData!=NULL){
if(Cliping(hWnd))
InvalidateRect(hWnd,NULL,TRUE);
}
else
MessageBox(hWnd,"File not loaded yet!","Error Message",MB_OK|MB_ICONEXCLAMATION);
break;
case IDM_THRESHOLD:
if(hImgData!=NULL){
if(Thresholding(hWnd))
InvalidateRect(hWnd,NULL,TRUE);
}
else
MessageBox(hWnd,"File not loaded yet!","Error Message",MB_OK|MB_ICONEXCLAMATION);
break;
case IDM_SLICEWITHOUTBACK:
if(hImgData!=NULL){
if(Slice(hWnd,FALSE))
InvalidateRect(hWnd,NULL,TRUE);
}
else
MessageBox(hWnd,"File not loaded yet!","Error Message",MB_OK|MB_ICONEXCLAMATION);
break;
case IDM_SLICEWITHBACK:
if(hImgData!=NULL){
if(Slice(hWnd,TRUE))
InvalidateRect(hWnd,NULL,TRUE);
}
else
MessageBox(hWnd,"File not loaded yet!","Error Message",MB_OK|MB_ICONEXCLAMATION);
break;
case IDM_HISTOGRAMEQUA:
if(hImgData!=NULL){
if(HistogramEqua(hWnd))
InvalidateRect(hWnd,NULL,TRUE);
}
else
MessageBox(hWnd,"File not loaded yet!","Error Message",MB_OK|MB_ICONEXCLAMATION);
break;
case IDM_EXIT:
SendMessage(hWnd,WM_DESTROY,0,0L);
break;
}
break;
}
return DefWindowProc (hWnd, message, wParam, lParam);
}
////////////////////////////////////////////////////////////////
BOOL LoadBmpFile (HWND hWnd,char *BmpFileName)
{
HFILE hf;
LPBITMAPINFOHEADER lpImgData;
LOGPALETTE *pPal;
LPRGBQUAD lpRGB;
HPALETTE hPrevPalette;
HDC hDc;
HLOCAL hPal;
DWORD ImgSize;
DWORD i;
if((hf=_lopen(BmpFileName,OF_READ))==HFILE_ERROR){
MessageBox(hWnd,"File c:\\test.bmp not found!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
_lread(hf,(LPSTR)&bf,sizeof(BITMAPFILEHEADER));
_lread(hf,(LPSTR)&bi,sizeof(BITMAPINFOHEADER));
ImgWidth=bi.biWidth;
ImgHeight=bi.biHeight;
LineBytes=(DWORD)WIDTHBYTES(bi.biWidth*bi.biBitCount);
ImgSize=(DWORD)LineBytes*bi.biHeight;
if(bi.biClrUsed!=0)
NumColors=(DWORD)bi.biClrUsed;
else
switch(bi.biBitCount){
case 1:
NumColors=2;
break;
case 4:
NumColors=16;
break;
case 8:
NumColors=256;
break;
case 24:
NumColors=0;
break;
default:
MessageBox(hWnd,"Invalid color numbers!","Error Message",MB_OK|MB_ICONEXCLAMATION);
_lclose(hf);
return FALSE;
}
if(bf.bfOffBits!=(DWORD)(NumColors*sizeof(RGBQUAD)+sizeof(BITMAPFILEHEADER)
+sizeof(BITMAPINFOHEADER)))
{
MessageBox(hWnd,"Invalid color numbers!","Error Message" ,MB_OK|
MB_ICONEXCLAMATION);
_lclose(hf);
return FALSE;
}
bf.bfSize=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+NumColors*sizeof(RGBQUAD)+ImgSize;
if((hImgData=GlobalAlloc(GHND,(DWORD)(sizeof(BITMAPINFOHEADER)+
NumColors*sizeof(RGBQUAD)+ImgSize)))==NULL)
{
MessageBox(hWnd,"Error alloc memory!","ErrorMessage",MB_OK|
MB_ICONEXCLAMATION);
_lclose(hf);
return FALSE;
}
lpImgData=(LPBITMAPINFOHEADER)GlobalLock(hImgData);
_llseek(hf,sizeof(BITMAPFILEHEADER),FILE_BEGIN);
_hread(hf,(char *)lpImgData,(long)sizeof(BITMAPINFOHEADER)
+(long)NumColors*sizeof(RGBQUAD)+ImgSize);
_lclose(hf);
if(NumColors!=0)
{
hPal=LocalAlloc(LHND,sizeof(LOGPALETTE) + NumColors* sizeof(PALETTEENTRY));
pPal =(LOGPALETTE *)LocalLock(hPal);
pPal->palNumEntries =(WORD) NumColors;
pPal->palVersion = 0x300;
lpRGB = (LPRGBQUAD)((LPSTR)lpImgData + (DWORD)sizeof(BITMAPINFOHEADER));
for (i = 0; i < NumColors; i++) {
pPal->palPalEntry[i].peRed=lpRGB->rgbRed;
pPal->palPalEntry[i].peGreen=lpRGB->rgbGreen;
pPal->palPalEntry[i].peBlue=lpRGB->rgbBlue;
pPal->palPalEntry[i].peFlags=(BYTE)0;
lpRGB++;
}
hPalette=CreatePalette(pPal);
LocalUnlock(hPal);
LocalFree(hPal);
}
hDc=GetDC(hWnd);
if(hPalette){
hPrevPalette=SelectPalette(hDc,hPalette,FALSE);
RealizePalette(hDc);
}
hBitmap=CreateDIBitmap(hDc, (LPBITMAPINFOHEADER)lpImgData, (LONG)CBM_INIT,
(LPSTR)lpImgData+sizeof(BITMAPINFOHEADER) +NumColors*sizeof(RGBQUAD),
(LPBITMAPINFO)lpImgData, DIB_RGB_COLORS);
if(hPalette && hPrevPalette){
SelectPalette(hDc,hPrevPalette,FALSE);
RealizePalette(hDc);
}
ReleaseDC(hWnd,hDc);
GlobalUnlock(hImgData);
return TRUE;
}
////////////////////////////////////////////////////////////////
BOOL CALLBACK InputBox( HWND hDlg, UINT message,WPARAM wParam, LPARAM lParam )
{
char str[80];
switch ( message ){
case WM_INITDIALOG:
SetDlgItemText(hDlg,ID_FIRSTPOINT,"0");
SetDlgItemText(hDlg,ID_SECONDPOINT,"0");
SetDlgItemText(hDlg,ID_STRETCHRATIO,"2.0");
SetDlgItemText(hDlg,ID_EQUASCALE,"128");
return TRUE;
case WM_COMMAND:
if ( wParam == IDOK || wParam == IDCANCEL )
{
GetDlgItemText(hDlg,ID_FIRSTPOINT,str,80);
FirstPoint=atoi(str);
GetDlgItemText(hDlg,ID_SECONDPOINT,str,80);
SecondPoint=atoi(str);
GetDlgItemText(hDlg,ID_STRETCHRATIO,str,80);
StretchRatio=(float)atof(str);
GetDlgItemText(hDlg,ID_EQUASCALE,str,80);
EquaScale=atoi(str);
EndDialog ( hDlg, TRUE );
return TRUE;
}
break;
}
return FALSE;
}
////////////////////////////////////////////////////////////////
BOOL ColortoGrayScale(HWND hWnd)
{
DWORD SrcBufSize,DstBufSize,DstLineBytes;
LPBITMAPINFOHEADER lpImgData;
LPSTR lpPtr;
HLOCAL hTempImgData;
LPBITMAPINFOHEADER lpTempImgData;
LPSTR lpTempPtr;
HDC hDc;
HFILE hf;
LONG x,y;
BITMAPFILEHEADER DstBf;
BITMAPINFOHEADER DstBi;
LOGPALETTE *pPal;
HPALETTE hPrevPalette;
HLOCAL hPal;
DWORD NewNumColors;
WORD NewBitCount;
float Y;
DWORD i;
unsigned char Red,Green,Blue,Gray;
NewNumColors=NumColors;
NewBitCount=bi.biBitCount;
if(NumColors==0) //true color
{
NewNumColors=256;
NewBitCount=8;
}
DstLineBytes=(DWORD)WIDTHBYTES(bi.biWidth*NewBitCount);
DstBufSize=(DWORD)(sizeof(BITMAPINFOHEADER)+NewNumColors*sizeof(RGBQUAD)+(DWORD)DstLineBytes*bi.biHeight);
memcpy((char *)&DstBf,(char *)&bf,sizeof(BITMAPFILEHEADER));
memcpy((char *)&DstBi,(char *)&bi,sizeof(BITMAPINFOHEADER));
DstBf.bfSize=DstBufSize+sizeof(BITMAPFILEHEADER);
DstBf.bfOffBits=(DWORD)(NewNumColors*sizeof(RGBQUAD)+sizeof(BITMAPFILEHEADER)
+sizeof(BITMAPINFOHEADER));
DstBi.biClrUsed=0;
DstBi.biBitCount=NewBitCount;
SrcBufSize=bf.bfSize-sizeof(BITMAPFILEHEADER);
if((hTempImgData=LocalAlloc(LHND,DstBufSize))==NULL)
{
MessageBox(hWnd,"Error alloc memory!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
lpImgData=(LPBITMAPINFOHEADER)GlobalLock(hImgData);
lpTempImgData=(LPBITMAPINFOHEADER)LocalLock(hTempImgData);
//copy image data
memcpy(lpTempImgData,lpImgData,DstBufSize);
//overwrite bitmapinfoheader with the new one
memcpy(lpTempImgData,(char *)&DstBi,sizeof(BITMAPINFOHEADER));
lpPtr=(char *)lpImgData+sizeof(BITMAPINFOHEADER);
lpTempPtr=(char *)lpTempImgData+sizeof(BITMAPINFOHEADER);
hPal=LocalAlloc(LHND,sizeof(LOGPALETTE) + NewNumColors* sizeof(PALETTEENTRY));
pPal =(LOGPALETTE *)LocalLock(hPal);
pPal->palNumEntries =(WORD) NewNumColors;
pPal->palVersion = 0x300;
if(NumColors==0) //true color
for (i = 0; i < 256; i++) {
pPal->palPalEntry[i].peRed=(BYTE)i;
pPal->palPalEntry[i].peGreen=(BYTE)i;
pPal->palPalEntry[i].peBlue=(BYTE)i;
pPal->palPalEntry[i].peFlags=(BYTE)0;
*(lpTempPtr++)=(unsigned char)i;
*(lpTempPtr++)=(unsigned char)i;
*(lpTempPtr++)=(unsigned char)i;
*(lpTempPtr++)=0;
}
else
for (i = 0; i < NewNumColors; i++) {
Blue=(unsigned char )(*lpPtr++);
Green=(unsigned char )(*lpPtr++);
Red=(unsigned char )(*lpPtr++);
Y=(float)(Red*0.299+Green*0.587+Blue*0.114);
Gray=(BYTE)Y;
lpPtr++;
pPal->palPalEntry[i].peRed=Gray;
pPal->palPalEntry[i].peGreen=Gray;
pPal->palPalEntry[i].peBlue=Gray;
pPal->palPalEntry[i].peFlags=0;
*(lpTempPtr++)=(unsigned char)Gray;
*(lpTempPtr++)=(unsigned char)Gray;
*(lpTempPtr++)=(unsigned char)Gray;
*(lpTempPtr++)=0;
}
if(hPalette!=NULL)
DeleteObject(hPalette);
hPalette=CreatePalette(pPal);
LocalUnlock(hPal);
LocalFree(hPal);
hDc=GetDC(hWnd);
if(hPalette){
hPrevPalette=SelectPalette(hDc,hPalette,FALSE);
RealizePalette(hDc);
}
if(NumColors==0)
for(y=0;ypalNumEntries =(WORD) NumColors;
pPal->palVersion = 0x300;
for (i = 0; i < NumColors; i++) {
Blue=(unsigned char )(*lpPtr++);
Green=(unsigned char )(*lpPtr++);
Red=(unsigned char )(*lpPtr++);
lpPtr++;
pPal->palPalEntry[i].peRed=(BYTE)(255-Red);
pPal->palPalEntry[i].peGreen=(BYTE)(255-Green);
pPal->palPalEntry[i].peBlue=(BYTE)(255-Blue);
pPal->palPalEntry[i].peFlags=0;
*(lpTempPtr++)=(unsigned char)(255-Blue);
*(lpTempPtr++)=(unsigned char)(255-Green);
*(lpTempPtr++)=(unsigned char)(255-Red);
*(lpTempPtr++)=0;
}
if(hPalette!=NULL)
DeleteObject(hPalette);
hPalette=CreatePalette(pPal);
LocalUnlock(hPal);
LocalFree(hPal);
if(hPalette){
hPrevPalette=SelectPalette(hDc,hPalette,FALSE);
RealizePalette(hDc);
}
}
else{
for(y=0;yMaxGrayNum)
MaxGrayNum=temp;
if( (temp0) )
MinGrayNum=temp;
}
GlobalUnlock(hImgData);
hPopupWnd = CreateWindow (
"PopupWindowClass",
"Histogram Statistic Window",
WS_OVERLAPPEDWINDOW,
50,80,550,350,
hWnd,NULL,ghInst,NULL
);
if (hPopupWnd){
ShowWindow (hPopupWnd, SW_SHOW);
UpdateWindow (hPopupWnd);
}
return TRUE;
}
////////////////////////////////////////////////////////////////
long FAR PASCAL PopupWndProc (HWND hWnd,UINT message,WPARAM wParam,LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
DWORD i;
int xstart;
static LOGPEN blp={PS_SOLID,1,1,RGB(0,0,255)};
HPEN bhp;
float a,b,temp;
char str[10];
a=(float)(265.0 /( MaxGrayNum - MinGrayNum) );
b=(float) (270.0-a* MaxGrayNum);
switch (message)
{
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
bhp = CreatePenIndirect(&blp);
SelectObject(hdc,bhp);
MoveToEx(hdc,2,270,NULL);
LineTo(hdc,518,270);
xstart=2;
for(i=0;i<256;i++){
MoveToEx(hdc,xstart,270,NULL);
if (GrayTable[i]!=0)
temp=(float)(a*GrayTable[i]+b);
else temp=0.0f;
LineTo(hdc,xstart,270-(int)temp);
if (i%16 ==0){
MoveToEx(hdc,xstart,270,NULL);
LineTo(hdc,xstart,280);
_itoa(i,str,10);
TextOut(hdc,xstart,285,str,strlen(str));
}
xstart+=2;
}
MoveToEx(hdc,xstart,270,NULL);
LineTo(hdc,xstart,280);
TextOut(hdc,xstart,285,"256",strlen("256"));
EndPaint(hWnd,&ps);
DeleteObject(bhp);
break;
default:
break;
}
return DefWindowProc (hWnd, message, wParam, lParam);
}
////////////////////////////////////////////////////////////////
BOOL Trueto256(HWND hWnd)
{
DWORD SrcBufSize,OffBits,DstBufSize,DstLineBytes;
LPBITMAPINFOHEADER lpImgData;
LPSTR lpPtr;
HLOCAL hTempImgData;
LPBITMAPINFOHEADER lpTempImgData;
LPSTR lpTempPtr;
HDC hDc;
HFILE hf;
LONG x,y;
BITMAPFILEHEADER DstBf;
BITMAPINFOHEADER DstBi;
LOGPALETTE *pPal;
HPALETTE hPrevPalette;
HLOCAL hPal;
WORD i,j;
int Red,Green,Blue,ClrIndex;
DWORD ColorHits[4096];
WORD ColorIndex[4096];
DWORD PalCounts,temp;
long ColorError1,ColorError2;
if(NumColors!=0){
MessageBox(hWnd,"Must be a true color bitmap!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
DstLineBytes=(DWORD)WIDTHBYTES(bi.biWidth*8);
DstBufSize=(DWORD)(sizeof(BITMAPINFOHEADER)+256*sizeof(RGBQUAD)+(DWORD)DstLineBytes*bi.biHeight);
memcpy((char *)&DstBf,(char *)&bf,sizeof(BITMAPFILEHEADER));
memcpy((char *)&DstBi,(char *)&bi,sizeof(BITMAPINFOHEADER));
DstBf.bfSize=DstBufSize+sizeof(BITMAPFILEHEADER);
DstBf.bfOffBits=(DWORD)(256*sizeof(RGBQUAD)+sizeof(BITMAPFILEHEADER)
+sizeof(BITMAPINFOHEADER));
DstBi.biClrUsed=0;
DstBi.biBitCount=8;
OffBits=bf.bfOffBits-sizeof(BITMAPFILEHEADER);
SrcBufSize=bf.bfSize-sizeof(BITMAPFILEHEADER);
if((hTempImgData=LocalAlloc(LHND,DstBufSize))==NULL)
{
MessageBox(hWnd,"Error alloc memory!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
lpImgData=(LPBITMAPINFOHEADER)GlobalLock(hImgData);
lpTempImgData=(LPBITMAPINFOHEADER)LocalLock(hTempImgData);
//copy image data
memcpy(lpTempImgData,lpImgData,OffBits);
//overwrite bitmapinfoheader with the new one
memcpy(lpTempImgData,(char *)&DstBi,sizeof(BITMAPINFOHEADER));
memset(ColorHits,0,4096*sizeof(DWORD));
memset(ColorIndex,0,4096*sizeof(WORD));
for(y=0;y>4);
ColorHits[ClrIndex]++;
}
}
PalCounts=0;
//pack the color table
for (ClrIndex = 0; ClrIndex < 4096; ClrIndex++)
{
if(ColorHits[ClrIndex]!=0){
ColorHits[PalCounts]=ColorHits[ClrIndex];
ColorIndex[PalCounts]=ClrIndex;
PalCounts++;
}
}
//sort the color table downsize
for (i = 0; i < PalCounts-1; i++)
for (j = i + 1; j < PalCounts; j++){
if (ColorHits[j] > ColorHits[i]){
temp = ColorHits[i];
ColorHits[i] = ColorHits[j];
ColorHits[j] = temp;
temp = ColorIndex[i];
ColorIndex[i] = ColorIndex[j];
ColorIndex[j] = (WORD)temp;
}
}
hPal=LocalAlloc(LHND,sizeof(LOGPALETTE) + 256* sizeof(PALETTEENTRY));
pPal =(LOGPALETTE *)LocalLock(hPal);
pPal->palNumEntries =(WORD) 256;
pPal->palVersion = 0x300;
lpTempPtr=(char *)lpTempImgData+sizeof(BITMAPINFOHEADER);
for (i = 0; i < 256; i++) {
pPal->palPalEntry[i].peRed=(BYTE)((ColorIndex[i] & 0x00f) << 4);
pPal->palPalEntry[i].peGreen=(BYTE)((ColorIndex[i] & 0x0f0));
pPal->palPalEntry[i].peBlue=(BYTE)((ColorIndex[i] & 0xf00) >> 4);
pPal->palPalEntry[i].peFlags=(BYTE)0;
*(lpTempPtr++)=(unsigned char)((ColorIndex[i] & 0xf00) >> 4);
*(lpTempPtr++)=(unsigned char)((ColorIndex[i] & 0x0f0));
*(lpTempPtr++)=(unsigned char)((ColorIndex[i] & 0x00f) << 4);
*(lpTempPtr++)=0;
ColorHits[i]=i;
}
//其余的颜色依据最小平方差近似为前256中最接近的一种
if (PalCounts > 256){
for (i = 256; i < PalCounts; i++){
ColorError1=1000000000;
Blue = (long)((ColorIndex[i] & 0xf00) >> 4);
Green = (long)((ColorIndex[i] & 0x0f0));
Red = (long)((ColorIndex[i] & 0x00f) << 4);
ClrIndex = 0;
for (j = 0; j < 256; j++){
ColorError2=(long)(Blue-pPal->palPalEntry[j].peBlue)*(Blue-pPal->palPalEntry[j].peBlue)+
(long)(Green-pPal->palPalEntry[j].peGreen)*(Green-pPal->palPalEntry[j].peGreen)+
(long)(Red-pPal->palPalEntry[j].peRed)*(Red-pPal->palPalEntry[j].peRed);
if (ColorError2 < ColorError1){
ColorError1 = ColorError2;
ClrIndex = j;
}
}
ColorHits[i] = ClrIndex;
}
}
if(hPalette!=NULL)
DeleteObject(hPalette);
//create new logic palette
hPalette=CreatePalette(pPal);
LocalUnlock(hPal);
LocalFree(hPal);
hDc=GetDC(hWnd);
if(hPalette){
hPrevPalette=SelectPalette(hDc,hPalette,FALSE);
RealizePalette(hDc);
}
for(y=0;y>4);
for (i = 0; i < PalCounts;i++)
if (ClrIndex == ColorIndex[i]){
*(lpTempPtr++)=(unsigned char)ColorHits[i];
break;
}
}
}
if(hBitmap!=NULL)
DeleteObject(hBitmap);
hBitmap=CreateDIBitmap(hDc, (LPBITMAPINFOHEADER)lpTempImgData, (LONG)CBM_INIT,
(LPSTR)lpTempImgData+sizeof(BITMAPINFOHEADER) +256*sizeof(RGBQUAD),
(LPBITMAPINFO)lpTempImgData, DIB_RGB_COLORS);
if(hPalette && hPrevPalette){
SelectPalette(hDc,hPrevPalette,FALSE);
RealizePalette(hDc);
}
hf=_lcreat("c:\\256.bmp",0);
_lwrite(hf,(LPSTR)&DstBf,sizeof(BITMAPFILEHEADER));
_lwrite(hf,(LPSTR)lpTempImgData,DstBufSize);
_lclose(hf);
ReleaseDC(hWnd,hDc);
LocalUnlock(hTempImgData);
LocalFree(hTempImgData);
GlobalUnlock(hImgData);
return TRUE;
}
////////////////////////////////////////////////////////////////
BOOL ContrastStretch(HWND hWnd)
{
DLGPROC dlgInputBox = NULL;
DWORD BufSize;
LPBITMAPINFOHEADER lpImgData;
LPSTR lpPtr;
HLOCAL hTempImgData;
LPBITMAPINFOHEADER lpTempImgData;
LPSTR lpTempPtr;
HDC hDc;
HFILE hf;
LOGPALETTE *pPal;
HPALETTE hPrevPalette=NULL;
HLOCAL hPal;
DWORD i;
unsigned char Gray;
float a,g1,g2,g;
if( NumColors!=256){
MessageBox(hWnd,"Must be a 256 grayscale bitmap!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
dlgInputBox = (DLGPROC) MakeProcInstance ( (FARPROC)InputBox, ghInst );
DialogBox (ghInst, "INPUTBOX", hWnd, dlgInputBox);
FreeProcInstance ( (FARPROC) dlgInputBox );
if( StretchRatio*(SecondPoint-FirstPoint) > 255.0){
MessageBox(hWnd,"StretchRatio*(SecondPoint-FirstPoint) can not be larger than 255!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
if( (SecondPoint-FirstPoint) >=255){
MessageBox(hWnd,"The area you selected can not be the whole scale!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
a=(float)((255.0-StretchRatio*(SecondPoint-FirstPoint))/(255.0-(SecondPoint-FirstPoint)));
g1=a*FirstPoint;
g2=StretchRatio*(SecondPoint-FirstPoint)+g1;
BufSize=bf.bfSize-sizeof(BITMAPFILEHEADER);
if((hTempImgData=LocalAlloc(LHND,BufSize))==NULL)
{
MessageBox(hWnd,"Error alloc memory!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
lpImgData=(LPBITMAPINFOHEADER)GlobalLock(hImgData);
lpTempImgData=(LPBITMAPINFOHEADER)LocalLock(hTempImgData);
//copy image data
memcpy(lpTempImgData,lpImgData,BufSize);
hDc=GetDC(hWnd);
lpPtr=(char *)lpImgData+sizeof(BITMAPINFOHEADER);
lpTempPtr=(char *)lpTempImgData+sizeof(BITMAPINFOHEADER);
hPal=LocalAlloc(LHND,sizeof(LOGPALETTE) + NumColors* sizeof(PALETTEENTRY));
pPal =(LOGPALETTE *)LocalLock(hPal);
pPal->palNumEntries =(WORD) NumColors;
pPal->palVersion = 0x300;
for (i = 0; i < 256; i++) {
Gray=(unsigned char )*lpPtr;
lpPtr+=4;
if(GraypalPalEntry[i].peRed=(BYTE)g;
pPal->palPalEntry[i].peGreen=(BYTE)g;
pPal->palPalEntry[i].peBlue=(BYTE)g;
pPal->palPalEntry[i].peFlags=0;
*(lpTempPtr++)=(unsigned char)g;
*(lpTempPtr++)=(unsigned char)g;
*(lpTempPtr++)=(unsigned char)g;
*(lpTempPtr++)=0;
}
if(hPalette!=NULL)
DeleteObject(hPalette);
hPalette=CreatePalette(pPal);
LocalUnlock(hPal);
LocalFree(hPal);
if(hPalette){
hPrevPalette=SelectPalette(hDc,hPalette,FALSE);
RealizePalette(hDc);
}
if(hBitmap!=NULL)
DeleteObject(hBitmap);
hBitmap=CreateDIBitmap(hDc, (LPBITMAPINFOHEADER)lpTempImgData, (LONG)CBM_INIT,
(LPSTR)lpTempImgData+sizeof(BITMAPINFOHEADER) +NumColors*sizeof(RGBQUAD),
(LPBITMAPINFO)lpTempImgData, DIB_RGB_COLORS);
if(hPalette && hPrevPalette){
SelectPalette(hDc,hPrevPalette,FALSE);
RealizePalette(hDc);
}
hf=_lcreat("c:\\stretch.bmp",0);
_lwrite(hf,(LPSTR)&bf,sizeof(BITMAPFILEHEADER));
_lwrite(hf,(LPSTR)lpTempImgData,BufSize);
_lclose(hf);
ReleaseDC(hWnd,hDc);
LocalUnlock(hTempImgData);
LocalFree(hTempImgData);
GlobalUnlock(hImgData);
return TRUE;
}
////////////////////////////////////////////////////////////////
BOOL Cliping(HWND hWnd)
{
DLGPROC dlgInputBox = NULL;
DWORD BufSize;
LPBITMAPINFOHEADER lpImgData;
LPSTR lpPtr;
HLOCAL hTempImgData;
LPBITMAPINFOHEADER lpTempImgData;
LPSTR lpTempPtr;
HDC hDc;
HFILE hf;
LOGPALETTE *pPal;
HPALETTE hPrevPalette=NULL;
HLOCAL hPal;
DWORD i;
unsigned char Gray;
float a,g;
if( NumColors!=256){
MessageBox(hWnd,"Must be a 256 grayscale bitmap!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
dlgInputBox = (DLGPROC) MakeProcInstance ( (FARPROC)InputBox, ghInst );
DialogBox (ghInst, "INPUTBOX", hWnd, dlgInputBox);
FreeProcInstance ( (FARPROC) dlgInputBox );
if( (SecondPoint-FirstPoint) >255){
MessageBox(hWnd,"The area you selected must be within [0-255]!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
a=(float)(255.0/(SecondPoint-FirstPoint));
BufSize=bf.bfSize-sizeof(BITMAPFILEHEADER);
if((hTempImgData=LocalAlloc(LHND,BufSize))==NULL)
{
MessageBox(hWnd,"Error alloc memory!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
lpImgData=(LPBITMAPINFOHEADER)GlobalLock(hImgData);
lpTempImgData=(LPBITMAPINFOHEADER)LocalLock(hTempImgData);
//copy image data
memcpy(lpTempImgData,lpImgData,BufSize);
hDc=GetDC(hWnd);
lpPtr=(char *)lpImgData+sizeof(BITMAPINFOHEADER);
lpTempPtr=(char *)lpTempImgData+sizeof(BITMAPINFOHEADER);
hPal=LocalAlloc(LHND,sizeof(LOGPALETTE) + NumColors* sizeof(PALETTEENTRY));
pPal =(LOGPALETTE *)LocalLock(hPal);
pPal->palNumEntries =(WORD) NumColors;
pPal->palVersion = 0x300;
for (i = 0; i < 256; i++) {
Gray=(unsigned char )*lpPtr;
lpPtr+=4;
if(GraypalPalEntry[i].peRed=(BYTE)g;
pPal->palPalEntry[i].peGreen=(BYTE)g;
pPal->palPalEntry[i].peBlue=(BYTE)g;
pPal->palPalEntry[i].peFlags=0;
*(lpTempPtr++)=(unsigned char)g;
*(lpTempPtr++)=(unsigned char)g;
*(lpTempPtr++)=(unsigned char)g;
*(lpTempPtr++)=0;
}
if(hPalette!=NULL)
DeleteObject(hPalette);
hPalette=CreatePalette(pPal);
LocalUnlock(hPal);
LocalFree(hPal);
if(hPalette){
hPrevPalette=SelectPalette(hDc,hPalette,FALSE);
RealizePalette(hDc);
}
if(hBitmap!=NULL)
DeleteObject(hBitmap);
hBitmap=CreateDIBitmap(hDc, (LPBITMAPINFOHEADER)lpTempImgData, (LONG)CBM_INIT,
(LPSTR)lpTempImgData+sizeof(BITMAPINFOHEADER) +NumColors*sizeof(RGBQUAD),
(LPBITMAPINFO)lpTempImgData, DIB_RGB_COLORS);
if(hPalette && hPrevPalette){
SelectPalette(hDc,hPrevPalette,FALSE);
RealizePalette(hDc);
}
hf=_lcreat("c:\\cliping.bmp",0);
_lwrite(hf,(LPSTR)&bf,sizeof(BITMAPFILEHEADER));
_lwrite(hf,(LPSTR)lpTempImgData,BufSize);
_lclose(hf);
ReleaseDC(hWnd,hDc);
LocalUnlock(hTempImgData);
LocalFree(hTempImgData);
GlobalUnlock(hImgData);
return TRUE;
}
////////////////////////////////////////////////////////////////
BOOL Thresholding(HWND hWnd)
{
DLGPROC dlgInputBox = NULL;
DWORD BufSize;
LPBITMAPINFOHEADER lpImgData;
LPSTR lpPtr;
HLOCAL hTempImgData;
LPBITMAPINFOHEADER lpTempImgData;
LPSTR lpTempPtr;
HDC hDc;
HFILE hf;
LOGPALETTE *pPal;
HPALETTE hPrevPalette=NULL;
HLOCAL hPal;
DWORD i;
unsigned char Gray;
if( NumColors!=256){
MessageBox(hWnd,"Must be a 256 grayscale bitmap!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
dlgInputBox = (DLGPROC) MakeProcInstance ( (FARPROC)InputBox, ghInst );
DialogBox (ghInst, "INPUTBOX", hWnd, dlgInputBox);
FreeProcInstance ( (FARPROC) dlgInputBox );
if( FirstPoint >255){
MessageBox(hWnd,"The point you selected must be within [0-255]","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
BufSize=bf.bfSize-sizeof(BITMAPFILEHEADER);
if((hTempImgData=LocalAlloc(LHND,BufSize))==NULL)
{
MessageBox(hWnd,"Error alloc memory!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
lpImgData=(LPBITMAPINFOHEADER)GlobalLock(hImgData);
lpTempImgData=(LPBITMAPINFOHEADER)LocalLock(hTempImgData);
//copy image data
memcpy(lpTempImgData,lpImgData,BufSize);
hDc=GetDC(hWnd);
lpPtr=(char *)lpImgData+sizeof(BITMAPINFOHEADER);
lpTempPtr=(char *)lpTempImgData+sizeof(BITMAPINFOHEADER);
hPal=LocalAlloc(LHND,sizeof(LOGPALETTE) + NumColors* sizeof(PALETTEENTRY));
pPal =(LOGPALETTE *)LocalLock(hPal);
pPal->palNumEntries =(WORD) NumColors;
pPal->palVersion = 0x300;
for (i = 0; i < 256; i++) {
Gray=(unsigned char )*lpPtr;
lpPtr+=4;
if(GraypalPalEntry[i].peRed=Gray;
pPal->palPalEntry[i].peGreen=Gray;
pPal->palPalEntry[i].peBlue=Gray;
pPal->palPalEntry[i].peFlags=0;
*(lpTempPtr++)=(unsigned char)Gray;
*(lpTempPtr++)=(unsigned char)Gray;
*(lpTempPtr++)=(unsigned char)Gray;
*(lpTempPtr++)=0;
}
if(hPalette!=NULL)
DeleteObject(hPalette);
hPalette=CreatePalette(pPal);
LocalUnlock(hPal);
LocalFree(hPal);
if(hPalette){
hPrevPalette=SelectPalette(hDc,hPalette,FALSE);
RealizePalette(hDc);
}
if(hBitmap!=NULL)
DeleteObject(hBitmap);
hBitmap=CreateDIBitmap(hDc, (LPBITMAPINFOHEADER)lpTempImgData, (LONG)CBM_INIT,
(LPSTR)lpTempImgData+sizeof(BITMAPINFOHEADER) +NumColors*sizeof(RGBQUAD),
(LPBITMAPINFO)lpTempImgData, DIB_RGB_COLORS);
if(hPalette && hPrevPalette){
SelectPalette(hDc,hPrevPalette,FALSE);
RealizePalette(hDc);
}
hf=_lcreat("c:\\threshold.bmp",0);
_lwrite(hf,(LPSTR)&bf,sizeof(BITMAPFILEHEADER));
_lwrite(hf,(LPSTR)lpTempImgData,BufSize);
_lclose(hf);
ReleaseDC(hWnd,hDc);
LocalUnlock(hTempImgData);
LocalFree(hTempImgData);
GlobalUnlock(hImgData);
return TRUE;
}
////////////////////////////////////////////////////////////////
BOOL Slice(HWND hWnd,BOOL WithBack)
{
DLGPROC dlgInputBox = NULL;
DWORD BufSize;
LPBITMAPINFOHEADER lpImgData;
LPSTR lpPtr;
HLOCAL hTempImgData;
LPBITMAPINFOHEADER lpTempImgData;
LPSTR lpTempPtr;
HDC hDc;
HFILE hf;
LOGPALETTE *pPal;
HPALETTE hPrevPalette=NULL;
HLOCAL hPal;
DWORD i;
unsigned char Gray;
if( NumColors!=256){
MessageBox(hWnd,"Must be a 256 grayscale bitmap!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
dlgInputBox = (DLGPROC) MakeProcInstance ( (FARPROC)InputBox, ghInst );
DialogBox (ghInst, "INPUTBOX", hWnd, dlgInputBox);
FreeProcInstance ( (FARPROC) dlgInputBox );
if( (SecondPoint-FirstPoint) >255){
MessageBox(hWnd,"The area you selected must be within [0-255]!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
BufSize=bf.bfSize-sizeof(BITMAPFILEHEADER);
if((hTempImgData=LocalAlloc(LHND,BufSize))==NULL)
{
MessageBox(hWnd,"Error alloc memory!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
lpImgData=(LPBITMAPINFOHEADER)GlobalLock(hImgData);
lpTempImgData=(LPBITMAPINFOHEADER)LocalLock(hTempImgData);
//copy image data
memcpy(lpTempImgData,lpImgData,BufSize);
hDc=GetDC(hWnd);
lpPtr=(char *)lpImgData+sizeof(BITMAPINFOHEADER);
lpTempPtr=(char *)lpTempImgData+sizeof(BITMAPINFOHEADER);
hPal=LocalAlloc(LHND,sizeof(LOGPALETTE) + NumColors* sizeof(PALETTEENTRY));
pPal =(LOGPALETTE *)LocalLock(hPal);
pPal->palNumEntries =(WORD) NumColors;
pPal->palVersion = 0x300;
for (i = 0; i < 256; i++) {
Gray=(unsigned char )*lpPtr;
lpPtr+=4;
if(WithBack){
if( (Gray>=FirstPoint) && (Gray<=SecondPoint))
Gray=255;
}
else{
if(GraypalPalEntry[i].peRed=Gray;
pPal->palPalEntry[i].peGreen=Gray;
pPal->palPalEntry[i].peBlue=Gray;
pPal->palPalEntry[i].peFlags=0;
*(lpTempPtr++)=(unsigned char)Gray;
*(lpTempPtr++)=(unsigned char)Gray;
*(lpTempPtr++)=(unsigned char)Gray;
*(lpTempPtr++)=0;
}
if(hPalette!=NULL)
DeleteObject(hPalette);
hPalette=CreatePalette(pPal);
LocalUnlock(hPal);
LocalFree(hPal);
if(hPalette){
hPrevPalette=SelectPalette(hDc,hPalette,FALSE);
RealizePalette(hDc);
}
if(hBitmap!=NULL)
DeleteObject(hBitmap);
hBitmap=CreateDIBitmap(hDc, (LPBITMAPINFOHEADER)lpTempImgData, (LONG)CBM_INIT,
(LPSTR)lpTempImgData+sizeof(BITMAPINFOHEADER) +NumColors*sizeof(RGBQUAD),
(LPBITMAPINFO)lpTempImgData, DIB_RGB_COLORS);
if(hPalette && hPrevPalette){
SelectPalette(hDc,hPrevPalette,FALSE);
RealizePalette(hDc);
}
if(WithBack)
hf=_lcreat("c:\\sliceb.bmp",0);
else
hf=_lcreat("c:\\slice.bmp",0);
_lwrite(hf,(LPSTR)&bf,sizeof(BITMAPFILEHEADER));
_lwrite(hf,(LPSTR)lpTempImgData,BufSize);
_lclose(hf);
ReleaseDC(hWnd,hDc);
LocalUnlock(hTempImgData);
LocalFree(hTempImgData);
GlobalUnlock(hImgData);
return TRUE;
}
////////////////////////////////////////////////////////////////
BOOL HistogramEqua(HWND hWnd)
{
DLGPROC dlgInputBox = NULL;
DWORD BufSize,OffBits;
LPBITMAPINFOHEADER lpImgData;
LPSTR lpPtr;
HLOCAL hTempImgData;
LPBITMAPINFOHEADER lpTempImgData;
LPSTR lpTempPtr;
HDC hDc;
HFILE hf;
LONG x,y;
LOGPALETTE *pPal;
HPALETTE hPrevPalette;
HLOCAL hPal;
WORD i;
int Gray;
DWORD GrayHits[256];
int GrayIndex[256];
float s[256];
if( NumColors!=256){
MessageBox(hWnd,"Must be a 256 grayscale bitmap!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
dlgInputBox = (DLGPROC) MakeProcInstance ( (FARPROC)InputBox, ghInst );
DialogBox (ghInst, "INPUTBOX", hWnd, dlgInputBox);
FreeProcInstance ( (FARPROC) dlgInputBox );
if( EquaScale >=255){
MessageBox(hWnd,"The new scale can not be larger than 255","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
OffBits=bf.bfOffBits-sizeof(BITMAPFILEHEADER);
BufSize=bf.bfSize-sizeof(BITMAPFILEHEADER);
if((hTempImgData=LocalAlloc(LHND,BufSize))==NULL)
{
MessageBox(hWnd,"Error alloc memory!","Error Message",MB_OK|MB_ICONEXCLAMATION);
return FALSE;
}
lpImgData=(LPBITMAPINFOHEADER)GlobalLock(hImgData);
lpTempImgData=(LPBITMAPINFOHEADER)LocalLock(hTempImgData);
//copy image data
memcpy(lpTempImgData,lpImgData,OffBits);
memset(GrayHits,0,256*sizeof(DWORD));
memset(GrayIndex,0,256*sizeof(WORD));
for(y=0;ypalNumEntries =(WORD) 256;
pPal->palVersion = 0x300;
lpTempPtr=(char *)lpTempImgData+sizeof(BITMAPINFOHEADER);
for (i = 0; i < EquaScale; i++) {
Gray=(int)(i*255.0/(EquaScale-1));
pPal->palPalEntry[i].peRed=(BYTE)Gray;
pPal->palPalEntry[i].peGreen=(BYTE)Gray;
pPal->palPalEntry[i].peBlue=(BYTE)Gray;
pPal->palPalEntry[i].peFlags=(BYTE)0;
*(lpTempPtr++)=(unsigned char)Gray;
*(lpTempPtr++)=(unsigned char)Gray;
*(lpTempPtr++)=(unsigned char)Gray;
*(lpTempPtr++)=0;
}
if(hPalette!=NULL)
DeleteObject(hPalette);
//create new logic palette
hPalette=CreatePalette(pPal);
LocalUnlock(hPal);
LocalFree(hPal);
hDc=GetDC(hWnd);
if(hPalette){
hPrevPalette=SelectPalette(hDc,hPalette,FALSE);
RealizePalette(hDc);
}
for(y=0;y