TableBasedImageData Constructor (inputStream, pixelCount)

Constructor. Adapted from John Cristy's ImageMagick. Decodes LZW image data into pixel array and returns table-based image data - see http://www.w3.org/Graphics/GIF/spec-gif89a.txt section 22. Simon Bridewell - July-August 2009 Extracted this logic from GifDecoder.cs Added logical properties Derive from GifComponent in order to make use of component status Use stronger types than just byte where appropriate

Declaration Syntax

Visual Basic

Visual C++

public TableBasedImageData(
	Stream inputStream,
	int pixelCount
)

Public Sub New ( _
	inputStream As Stream, _
	pixelCount As Integer _
)

public:
TableBasedImageData(
	Stream^ inputStream, 
	int pixelCount
)

Parameters

inputStream (Stream): The stream from which the image data is to be read, starting with the LZW minimum code size, and ending with a block terminator.

pixelCount (Int32): Number of pixels in the image.

Remarks

The input stream is read, first into the LZW minimum code size, then into data blocks. Bytes are extracted from the data blocks into a datum until the datum contains enough bits to form a code; this code is then extracted from the datum and decoded into a pixel index. Once all data has been read, or a block terminator, end-of-information code or error condition is encountered, any remaining pixel indices not already populated default to zero.

Assembly: GifComponents (Module: GifComponents) Version: 0.1.3594.26453