|
||
class CHardwareGraphicsAccelerator : public CGraphicsAccelerator;
A factory for creating 2D graphics accelerator objects whose graphics operations are implemented in hardware, software or a mixture of both.
Objects of derived classes can only write to hardware bitmaps (RHardwareBitmap
). Note that graphics accelerators may support only a subset of all graphics operations.
CBase
-
Base class for all classes to be instantiated on the heap.
CGraphicsAccelerator
- Abstract base class for 2D graphics accelerators.
CHardwareGraphicsAccelerator
- A factory for creating 2D graphics accelerator objects whose graphics operations...
Defined in CHardwareGraphicsAccelerator
:
Capabilities()
Returns the capabilities of the graphics accelerator.GenericCapabilities()
Gets the generic capabilities of the accelerator, including the supported displa...NewL(RHardwareBitmap)
Create a new CHardwareGraphicsAccelerator for use with a given hardware bitmap.Operation(TDes8 &)
Requests the graphics accelerator perform one or more graphics operations contai...Operation(TDes8 &,TInt,TRect *)
Requests the graphics accelerator perform one or more graphics operations within...Operation(const TGraphicsOperation &)
Requests the graphics accelerator to perform a single graphics operation.Operation(const TGraphicsOperation &,TInt,TRect *)
Requests the graphics accelerator perform a single graphics operation within a c...Reserved_1()
Reserved_2()
Reserved_3()
Reserved_4()
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...RHardwareBitmap
The interface to a hardware bitmap.IMPORT_C static CHardwareGraphicsAccelerator* NewL(RHardwareBitmap aBitmap);
Create a new CHardwareGraphicsAccelerator for use with a given hardware bitmap.
Do not use, link against scdv.lib.
|
|
IMPORT_C static const TGraphicsAcceleratorCaps* GenericCapabilities();
Gets the generic capabilities of the accelerator, including the supported display modes for the bitmap passed to CHardwareGraphicsAccelerator::NewL(RHardwareBitmap)
.
Do not use, link against scdv.lib.
|
virtual const TGraphicsAcceleratorCaps* Capabilities()=0;
Returns the capabilities of the graphics accelerator.
|
virtual TInt Operation(const TGraphicsOperation &aOperation)=0;
Requests the graphics accelerator to perform a single graphics operation.
|
|
virtual TInt Operation(const TGraphicsOperation &aOperation, TInt aNumClipRects, TRect *aClipRects)=0;
Requests the graphics accelerator perform a single graphics operation within a clipping region. This version is of CHardwareGraphicsAccelerator::Operation(const TGraphicsOperation &)
is only usable if the accelerator capabilities returned by CHardwareGraphicsAccelerator::Capabilities()
indicate that clipping to a region is supported.
|
|
TGraphicsAcceleratorCaps::iClipping
Indicates whether the Operation() methods which take clipping rectangles as para...virtual TInt Operation(TDes8 &aBuffer)=0;
Requests the graphics accelerator perform one or more graphics operations contained in a buffer.
The underlying implementation may be able to process a group of graphics operations more efficiently than if CHardwareGraphicsAccelerator::Operation(const TGraphicsOperation &)
was called for each individually.
This function should be implemented as if CHardwareGraphicsAccelerator::Operation(const TGraphicsOperation &)
was called in turn for each operation contained in the buffer. Each operation should be carried out immediately after the
one preceding it. If a method returns an error, the length of aBuffer should be set to indicate the number of operations that
have been successfully processed. In this case, the operation in which the error occurred will be indicated by the memory
address &aBuffer[aBuffer.Length()].
|
|
virtual TInt Operation(TDes8 &aBuffer, TInt aNumClipRects, TRect *aClipRects)=0;
Requests the graphics accelerator perform one or more graphics operations within a clipping region. This version is of CHardwareGraphicsAccelerator::Operation(const TGraphicsOperation &)
is only usable if the accelerator capabilities returned by CHardwareGraphicsAccelerator::Capabilities()
indicate that clipping to a region is supported.
The underlying implementation may be able to process a group of graphics operations more efficiently than if CHardwareGraphicsAccelerator::Operation(const TGraphicsOperation &)
was called for each individually.
This function should be implemented as if CHardwareGraphicsAccelerator::Operation(const TGraphicsOperation &)
was called in turn for each operation contained in the buffer. Each operation should be carried out immediately after the
one preceding it. If a method returns an error, the length of aBuffer should be set to indicate the number of operations that
have been successfully processed. In this case, the operation in which the error occurred will be indicated by the memory
address &aBuffer[aBuffer.Length()].
|
|
TGraphicsAcceleratorCaps::iClipping
Indicates whether the Operation() methods which take clipping rectangles as para...virtual void Reserved_4()=0;