BOOL CClockST::GetBitmapAndPalette(UINT nIDResource, CBitmap& bitmap, CPalette& pal)
{
HINSTANCE hInstResource = NULL;
// Find correct resource handle
hInstResource = AfxFindResourceHandle(MAKEINTRESOURCE(nIDResource), RT_BITMAP/*RT_GROUP_BITMAP*/);
HBITMAP hBmp = (HBITMAP)::LoadImage( hInstResource,
MAKEINTRESOURCE(nIDResource), IMAGE_BITMAP, 0,0, LR_CREATEDIBSECTION);
if (hBmp == NULL) return FALSE;
bitmap.Attach(hBmp);
// Create a logical palette for the bitmap
DIBSECTION ds;
BITMAPINFOHEADER &bmInfo = ds.dsBmih;
bitmap.GetObject(sizeof(ds), &ds);
int nColors = bmInfo.biClrUsed ? bmInfo.biClrUsed : 1 << bmInfo.biBitCount;
// Create a halftone palette if colors > 256.
CClientDC dc(NULL); // Desktop DC
if(nColors > 256)
pal.CreateHalftonePalette(&dc);
else
{
// Create the palette
RGBQUAD *pRGB = new RGBQUAD[nColors];
CDC memDC;
memDC.CreateCompatibleDC(&dc);
memDC.SelectObject( &bitmap );
::GetDIBColorTable( memDC, 0, nColors, pRGB );
UINT nSize = sizeof(LOGPALETTE) + (sizeof(PALETTEENTRY) * nColors);
LOGPALETTE *pLP = (LOGPALETTE *) new BYTE[nSize];
pLP->palVersion = 0x300;
pLP->palNumEntries = nColors;
for (int i=0; i < nColors; i++)
{
pLP->palPalEntry[i].peRed = pRGB[i].rgbRed;
pLP->palPalEntry[i].peGreen = pRGB[i].rgbGreen;
pLP->palPalEntry[i].peBlue = pRGB[i].rgbBlue;
pLP->palPalEntry[i].peFlags = 0;
}
pal.CreatePalette( pLP );
delete[] pLP;
delete[] pRGB;
}
return TRUE;
} // End of GetBitmapAndPalette
/////////////////////////////////////////////////////////////////////////////
//
// Create the palette. Use halftone palette for hi-color bitmaps.
//
/////////////////////////////////////////////////////////////////////////////
zBOOL
ZDib::CreatePalette( CPalette& pal )
{
// Should not already have palette
ASSERT( pal.m_hObject == 0 );
zBOOL bRC = FALSE;
RGBQUAD *colors = new RGBQUAD[ MAXPALCOLORS ];
UINT nColors = GetColorTable( colors, MAXPALCOLORS );
if ( nColors > 0 )
{
// Allocate memory for logical palette.
int nLth = sizeof( LOGPALETTE ) + sizeof( PALETTEENTRY ) * nColors;
LOGPALETTE *pLogPal = (LOGPALETTE *) new char[ nLth ];
if ( pLogPal == 0 )
return( 0 );
// Set version and number of palette entries.
pLogPal->palVersion = PALVERSION;
pLogPal->palNumEntries = nColors;
// Copy color entries.
for ( UINT k = 0; k < nColors; k++ )
{
pLogPal->palPalEntry[ k ].peRed = colors[ k ].rgbRed;
pLogPal->palPalEntry[ k ].peGreen = colors[ k ].rgbGreen;
pLogPal->palPalEntry[ k ].peBlue = colors[ k ].rgbBlue;
pLogPal->palPalEntry[ k ].peFlags = 0;
}
// Create the palette and destroy LOGPAL.
bRC = pal.CreatePalette( pLogPal );
delete [] (zPCHAR) pLogPal;
}
else
{
CWindowDC dcScreen( 0 );
bRC = pal.CreateHalftonePalette( &dcScreen );
}
delete [] colors;
return( bRC );
}
//////////////////
// Create the palette. Use halftone palette for hi-color bitmaps.
//
BOOL CDib::CreatePalette(CPalette& pal)
{
// should not already have palette
ASSERT(pal.m_hObject==NULL);
BOOL bRet = FALSE;
RGBQUAD* colors = new RGBQUAD[MAXPALCOLORS];
UINT nColors = GetColorTable(colors, MAXPALCOLORS);
if (nColors > 0) {
// Allocate memory for logical palette
int len = sizeof(LOGPALETTE) + sizeof(PALETTEENTRY) * nColors;
LOGPALETTE* pLogPal = (LOGPALETTE*)new char[len];
if (!pLogPal)
return NULL;
// set version and number of palette entries
pLogPal->palVersion = PALVERSION;
pLogPal->palNumEntries = nColors;
// copy color entries
for (UINT i = 0; i < nColors; i++) {
pLogPal->palPalEntry[i].peRed = colors[i].rgbRed;
pLogPal->palPalEntry[i].peGreen = colors[i].rgbGreen;
pLogPal->palPalEntry[i].peBlue = colors[i].rgbBlue;
pLogPal->palPalEntry[i].peFlags = 0;
}
// create the palette and destroy LOGPAL
bRet = pal.CreatePalette(pLogPal);
delete [] (char*)pLogPal;
} else {
CWindowDC dcScreen(NULL);
bRet = pal.CreateHalftonePalette(&dcScreen);
}
delete colors;
return bRet;
}
