Memory consumed must vary with different ColourDepth

[saurbh_g]

I'm using CImageLoader to load imgs

Load()
{
User::CountAllocCells(); // tells how many cells used till now
..
iTempBitmap = new(ELeave) CFbsBitmap();
iTempBitmap->Create( TSize(1,1), KDeviceColourDepth );
iImgLoader->LoadFileL(iTempBitmap, iFileName, 0 );
...
}

ImageOperationCompleteL(TInt aError)
{
User::CountAllocCells(); // tells how many cells used till now
}

------------

my question is : With varying KDeviceColourDepth (EGray2, EGray256, EColor4K , EColor16M) CountAllocCells() must return different
cell count. i.e. memory consumed must increase.

But it remains constant !!!!!

[saurbh_g]

One more point

NOKIA uses 4096 color palette in mobile. So I understand why
size does not change till EColor4K. But after that ?

Also In my PC days, changing image palette, changes img on screen but here I'm setting EGray2/EGray256 palette but no difference.

pal = CPalette::NewDefaultL(EGray256);

iTempBitmap = new(ELeave) CFbsBitmap();
iTempBitmap->Create( TSize(1,1), KDeviceColourDepth );
iTempBitmap->SetPalette(pal);


I'm bit confused abt how palettes r used in MOBILE.

Any help, DOC will be helpful.


saur