Class CFbsColor256BitmapUtil

class CFbsColor256BitmapUtil : public CBase;

Description

Copies a bitmap in any display mode of at least 256 colours into a 256 colour bitmap, optionally using a user-defined palette.

Derivation

• CBase - Base class for all classes to be instantiated on the heap.

• CFbsColor256BitmapUtil - Copies a bitmap in any display mode of at least 256 colours into a 256 colour bi...

Members

Defined in CFbsColor256BitmapUtil:

• CopyBitmap(CFbsBitmap *,CFbsBitmap *,TDither)Copies the contents of a source bitmap to a destination 256 colour bitmap. Both ...
• EFloydSteinbergUse the Floyd-Steinberg dithering algorithm.
• ENoDitherNo dithering.
• NewL(const CPalette *)Allocates and constructs a new 256 colour bitmap utility object, optionally spec...
• TDitherIndicates whether or not to use dithering.

Inherited from CBase:

• Delete(CBase *)Deletes the specified object.
• Extension_(TUint,TAny *&,TAny *)Extension function
• operator new(TUint)Allocates the object from the heap and then initialises its contents to binary z...
• operator new(TUint,TAny *)Initialises the object to binary zeroes.
• operator new(TUint,TLeave)Allocates the object from the heap and then initialises its contents to binary z...
• operator new(TUint,TLeave,TUint)Allocates the object from the heap and then initialises its contents to binary z...
• operator new(TUint,TUint)Allocates the object from the heap and then initialises its contents to binary z...

IMPORT_C static CFbsColor256BitmapUtil* NewL(const CPalette *aPalette);

Description

Allocates and constructs a new 256 colour bitmap utility object, optionally specifying a palette.

Parameters

const CPalette *aPalette The palette of colours to use for the destination 256 colour bitmap. If there are more than 256 colours in the palette, only the first 256 are used. May be NULL, in which case the system default 256 colour palette is used.

Return value

CFbsColor256BitmapUtil * The newly constructed object.

IMPORT_C TInt CopyBitmap(CFbsBitmap *aColor256Destination, CFbsBitmap *aSource, TDither aDither=ENoDither);

Description

Copies the contents of a source bitmap to a destination 256 colour bitmap. Both bitmaps must be the same size and the destination bitmap's display mode must be EColor256.

Parameters

CFbsBitmap *aColor256Destination The destination to copy the bitmap to. Its display mode must be EColor256. CFbsBitmap *aSource The source bitmap to copy from. Its display mode can be EColor16M, EColor64K, EColor4K or EColor256. CFbsColor256BitmapUtil::TDither aDither Specify EFloydSteinberg for Floyd-Steinberg dithering. By default, no dithering.

Return value

TInt KErrNone, if successful; otherwise, another of the system-wide error codes. KErrNotSupported is returned if aSource's display mode is not one of the values listed.

Panic codes

EFbsColor256UtilError Either aColor256Destination's display mode is not EColor256, or the two bitmaps are not the same size.

TDither

Description

Indicates whether or not to use dithering.

ENoDither No dithering. EFloydSteinberg Use the Floyd-Steinberg dithering algorithm.