void CDib::CreatePaletteFromImage( CPalette& palette)const
{
if( palette.m_hObject )
palette.DeleteObject();
ASSERT( IsIndexed() == GetBPP() <= 8);
if( GetBPP() <= 8)
{
GetPalette(palette);
//CPalette* pal = CPalette::FromHandle(m_hPalette);
//PALETTEENTRY colors[256] = {0};
//pal->GetPaletteEntries(0, 256, colors);
//palette.SetPaletteEntries( 0, 256, colors );
}
else
{
LPLOGPALETTE pLogPal = (LPLOGPALETTE) new char[2 * sizeof(WORD) +
256 * sizeof(PALETTEENTRY)];
pLogPal->palVersion = 0x300;
pLogPal->palNumEntries = 256;
palette.CreatePalette(pLogPal);
delete pLogPal;
pLogPal = NULL;
CArray<COLORREF, COLORREF> colorArray;
int height= GetHeight();
int width = GetWidth();
for(int i=0; i<width; i++)
{
for(int j=0; j<height; j++)
{
COLORREF color = GetPixel(i, j);
if( UtilWin::FindInArray( colorArray, color) == -1)
colorArray.Add(color);
if( colorArray.GetSize() == 256)
break;
}
if( colorArray.GetSize() == 256)
break;
}
PALETTEENTRY pe[256]={0};
for (int i = 0; i < colorArray.GetSize(); i++)
{
COLORREF color = colorArray[i];
pe[i].peRed = GetRValue(color);
pe[i].peGreen = GetGValue(color);
pe[i].peBlue = GetBValue(color);
}
palette.SetPaletteEntries(0, 256, pe);
}
}
BOOL CDib::GetPalette(CPalette& palette)const
{
if( (HPALETTE)palette)
palette.DeleteObject();
/*HDC hDC = GetDC();
CPalette* pPalette = CPalette::FromHandle( (HPALETTE)GetCurrentObject(hDC, OBJ_PAL));
int iColors = 0;
if (!pPalette->GetObject(sizeof(int), &iColors))
{
TRACE("Failed to get num palette colors");
return FALSE;
}
ReleaseDC();
*/
int iColors = GetMaxColorTableEntries();
if(iColors==0)
return FALSE;
RGBQUAD quad[256] = {0};
//LPRGBQUAD pctThis = (LPRGBQUAD) &quad;
GetColorTable(0, iColors, &quad[0]);
LPLOGPALETTE pLogPal = (LPLOGPALETTE) new char[2 * sizeof(WORD) +
iColors * sizeof(PALETTEENTRY)];
pLogPal->palVersion = 0x300;
pLogPal->palNumEntries = iColors;
for (int i = 0; i < iColors; i++)
{
pLogPal->palPalEntry[i].peRed = quad[i].rgbRed;
pLogPal->palPalEntry[i].peGreen = quad[i].rgbGreen;
pLogPal->palPalEntry[i].peBlue = quad[i].rgbBlue;
}
palette.CreatePalette(pLogPal);
delete pLogPal;
return true;
}
HANDLE CImageWindow::DDBToDIB(CDC* pDC, CBitmap &Bitmap, CPalette *pPal)
{
if( !pDC ) return NULL;
BITMAP Bmp;
BITMAPINFO BmpInfo;
CPalette Palette;
CPalette* pOldPalette = NULL;
//기본 팔레트 생성
Palette.CreateStockObject(DEFAULT_PALETTE);
//비트맵 정보를 얻는다.
Bitmap.GetBitmap(&Bmp);
//////////////////////////////////////////////////////////////////////////
// 1. 비트맵 해더를 초기화 한다.
BmpInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
BmpInfo.bmiHeader.biWidth = Bmp.bmWidth;
BmpInfo.bmiHeader.biHeight = Bmp.bmHeight;
BmpInfo.bmiHeader.biPlanes = 1;
BmpInfo.bmiHeader.biBitCount = Bmp.bmPlanes * Bmp.bmBitsPixel;
BmpInfo.bmiHeader.biCompression = BI_RGB;
BmpInfo.bmiHeader.biSizeImage = 0;
BmpInfo.bmiHeader.biXPelsPerMeter = 0;
BmpInfo.bmiHeader.biYPelsPerMeter = 0;
BmpInfo.bmiHeader.biClrUsed = 0;
BmpInfo.bmiHeader.biClrImportant = 0;
//비트맵 헤더와 컬러 테이블의 크기를 계산한다.
int nColors = (1 << BmpInfo.bmiHeader.biBitCount);
if (nColors > 256){
nColors = 0;
}
DWORD dwImageLength = BmpInfo.bmiHeader.biSize + nColors * sizeof(RGBQUAD);
//저장할 윈도우의 팔레트를 기본 팔레트로 설정한다.
pOldPalette = pDC->SelectPalette(&Palette, FALSE);
pDC->RealizePalette();
//DIB가 저장될 메모리(비트맵 정보 헤더와 컬러 테이블)을 할당한다.
HANDLE hDIB = ::GlobalAlloc(GPTR, dwImageLength);
if (hDIB == NULL)
{
pDC->SelectPalette(pOldPalette, FALSE);
return NULL;
}
//////////////////////////////////////////////////////////////////////////
//2. 비트맵 이미지의 크기를 계산한다.
::GetDIBits(pDC->GetSafeHdc(),
(HBITMAP)Bitmap.GetSafeHandle(),
0L,
BmpInfo.bmiHeader.biHeight,
NULL, //이 값이 NULL이면 이미지 크기를 계산.
(LPBITMAPINFO)&BmpInfo.bmiHeader,
DIB_RGB_COLORS);
if (BmpInfo.bmiHeader.biSizeImage == 0)
{
pDC->SelectPalette(pOldPalette, FALSE);
GlobalFree(hDIB);
return NULL;
}
//////////////////////////////////////////////////////////////////////////
//3. DIB 이미지를 구함.
dwImageLength += BmpInfo.bmiHeader.biSizeImage;
HANDLE hRealloc = ::GlobalReAlloc(hDIB, dwImageLength, GMEM_MOVEABLE);
if (hRealloc != NULL)
{
hDIB = hRealloc;
}
else
{
pDC->SelectPalette(pOldPalette, FALSE);
GlobalFree(hDIB);
return NULL;
}
//DDB에서 DIB로 변환된 이미지를 구함.
if (!::GetDIBits(pDC->GetSafeHdc(),
(HBITMAP)Bitmap.GetSafeHandle(),
0L, // Start scan line
(DWORD)BmpInfo.bmiHeader.biHeight, //# of scan lines
(LPBYTE)hDIB + (BmpInfo.bmiHeader.biSize + nColors * sizeof(RGBQUAD)),
(LPBITMAPINFO)&BmpInfo.bmiHeader, //address of bitmapinfo
(DWORD)DIB_RGB_COLORS))
{
pDC->SelectPalette(pOldPalette, FALSE);
GlobalFree(hDIB);
return NULL;
}
//DIB 헤더 작성
memcpy(hDIB, &BmpInfo.bmiHeader, sizeof(BITMAPINFOHEADER));
pDC->SelectPalette(pOldPalette, FALSE);
Palette.DeleteObject();
return hDIB;
}
