procedure Write(ABitmap:TAdBitmap; AStream:TStream); virtual; abstract;procedure Read(ABitmap:TAdBitmap; AStream:TStream); virtual; abstract;class function ID:TAdVeryShortString; virtual; abstract;| Description | Hierarchy | Fields | Methods | Properties |
type TAdGraphicCompressor = class(TAdPersistent)
TAdGraphicCompressor is an abstract class, which allows to save bitmap data using different encoding and compressing technologies.
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procedure Write(ABitmap:TAdBitmap; AStream:TStream); virtual; abstract; |
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procedure Read(ABitmap:TAdBitmap; AStream:TStream); virtual; abstract; |
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class function ID:TAdVeryShortString; virtual; abstract; |
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property OnProgress: TAdGraphicProgress read FProgress write FProgress; |
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procedure Write(ABitmap:TAdBitmap; AStream:TStream); virtual; abstract; |
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This should be used to write the bitmap data into the specified stream. The compressor ID is automaticly written by the caller of the procedure. | |
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procedure Read(ABitmap:TAdBitmap; AStream:TStream); virtual; abstract; |
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This should be used to read the bitmap data from the specified stream. The compressor ID has already be read by the caller of the procedure. | |
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class function ID:TAdVeryShortString; virtual; abstract; |
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This class function should be used to return a unique ID, which specifies the compressor. | |
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property OnProgress: TAdGraphicProgress read FProgress write FProgress; |
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This event should be called to show the progress of encoding/decoding the bitmap data | |