ILBMDecoder (MultiShow 2.43)

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ch.randelshofer.media.ilbm
Class ILBMDecoder

java.lang.Object
  ch.randelshofer.media.ilbm.ILBMDecoder

All Implemented Interfaces:: IFFVisitor

public class ILBMDecoder
extends java.lang.Object
implements IFFVisitor
extends java.lang.Object
implements IFFVisitor

Creates Image objects by reading an IFF ILBM stream.

ILBM regular expression

 ILBM ::= "FORM" #{ "ILBM" BMHD [CMAP] [GRAB] [DEST] [SPRT] [CAMG] CRNG* CCRT* [BODY] }

 BMHD ::= "BMHD" #{ BitMapHeader }
 CMAP ::= "CMAP" #{ (red green blue)* } [0]
 GRAB ::= "GRAB" #{ Point2D }
 DEST ::= "DEST" #{ DestMerge }
 SPRT ::= "SPRT" #{ SpritePrecedence }
 CAMG ::= "CAMG" #{ LONG }

 CRNG ::= "CRNG" #{ CRange }
 DRNG ::= "DRNG" #{ DRange }
 CCRT ::= "CCRT" #{ CycleInfo }
 BODY ::= "BODY" #{ UBYTE* } [0]

The token "#" represents a ckSize LONG count of the following braced data bytes. E.g., a BMHD's "#" should equal sizeof(BitMapHeader). Literal strings are shown in "quotes", [square bracket items] are optional, and "*" means 0 or more repetitions. A sometimes-needed pad byte is shown as "[0]".

Version:: 1.5.1 2010-07-03 Improved performance of byterun1 decoder.
1.4 2010-01-22 Added support for DRNG color cycling.
1.3 2009-12-24 Added support for CRNG color cycling.
1.2 2004-05-20 Support for masking bitplane added. Removed enforcing of true colors (Apple fixed bugs in its Java VM).
1.1 2003-08-15 Enforcing True color for images. Due to bug in Java 1.3.1, 1.4.1 on Mac OS X 10.0 through 10.2.
1.0.2 2003-01-19 Conversion to JDK 1.3 continued.
1.0.1 2001-06-17 Conversion to JDK 1.3 in progress.
1.0 1999-10-19
Author:: Werner Randelshofer, Hausmatt 10, CH-6405 Immensee, Switzerland

Field Summary
`protected static int`	`BMHD_ID`
`protected int`	`bmhdCompression`
`protected int`	`bmhdHeight` Raster width_ and heigth in pixels
`protected int`	`bmhdMasking`
`protected int`	`bmhdNbPlanes` Number of source bitplanes.
`protected int`	`bmhdPageHeight` Source "page" size in pixels.
`protected int`	`bmhdPageWidth` Source "page" size in pixels.
`protected int`	`bmhdTransparentColor` Transparent "color number" (sort of).
`protected int`	`bmhdWidth` Raster width_ and heigth in pixels
`protected int`	`bmhdXAspect` Pixel aspect, a ratio width : height
`protected int`	`bmhdXPosition` pixel position for this image
`protected int`	`bmhdYAspect` Pixel aspect, a ratio width : height
`protected int`	`bmhdYPosition` pixel position for this image
`protected static int`	`BODY_ID`
`protected BitmapImage`	`bodyBitmap` BODY data
`protected int`	`camg` Commodore Amiga Graphics Mode.
`protected static int`	`CAMG_ID`
`protected int`	`camgMode` CAMG Video display mode.
`protected static int`	`CMAP_ID`
`protected java.awt.image.ColorModel`	`cmapColorModel` CMAP data.
`protected static int`	`CMP_BYTE_RUN_1` ILBM BMHD chunk: compression algorithm.
`protected static int`	`CMP_NONE` ILBM BMHD chunk: compression algorithm.
`protected static int`	`CMP_VERTICAL` ILBM BMHD chunk: compression algorithm.
`protected static int`	`CRNG_ID`
`protected static int`	`DRNG_ID`
`protected static int`	`EHB_MASK`
`protected static int`	`EXTRAHALFBRITE_KEY`
`protected static int`	`HAM_KEY`
`protected static int`	`HAM_MASK`
`protected static int`	`ILBM_ID` Chunk ID's.
`protected java.io.InputStream`	`inputStream` Input stream to decode from.
`protected java.net.URL`	`location` URL to get the input stream from.
`protected static int`	`MODE_DIRECT_COLORS` ILBM CAMG chunk: Commodore Amiga Video display modes.
`protected static int`	`MODE_EHB` ILBM CAMG chunk: Commodore Amiga Video display modes.
`protected static int`	`MODE_HAM6` ILBM CAMG chunk: Commodore Amiga Video display modes.
`protected static int`	`MODE_HAM8` ILBM CAMG chunk: Commodore Amiga Video display modes.
`protected static int`	`MODE_INDEXED_COLORS` ILBM CAMG chunk: Commodore Amiga Video display modes.
`protected static int`	`MSK_HAS_MASK` ILBM BMHD chunk: masking technique.
`protected static int`	`MSK_HAS_TRANSPARENT_COLOR` ILBM BMHD chunk: masking technique.
`protected static int`	`MSK_LASSO` ILBM BMHD chunk: masking technique.
`protected static int`	`MSK_NONE` ILBM BMHD chunk: masking technique.
`protected java.util.Hashtable`	`properties` Properties.
`protected java.util.ArrayList<ColorCyclingMemoryImageSource>`	`sources` Stores all the ILBM pictures found during decoding as an instance of ColorCyclingMemoryImageSource.
`protected static int`	`VDAT_ID`

Constructor Summary
`ILBMDecoder(java.io.InputStream in)` Constructors
`ILBMDecoder(java.net.URL location)`

Method Summary
`protected void`	`decodeBMHD(IFFChunk chunk)`
`protected void`	`decodeBODY(IFFChunk chunk)`
`protected void`	`decodeCAMG(IFFChunk chunk)` Decodes the CAMG Chunk.
`protected void`	`decodeCMAP(IFFChunk chunk)`
`protected ColorCycle`	`decodeCRNG(IFFChunk chunk)` Decodes the color range cycling (ILBM CRNG).
`protected ColorCycle`	`decodeDRNG(IFFChunk chunk)` Decodes the DPaint IV enhanced color cycle chunk (ILBM DRNG)
`void`	`enterGroup(IFFChunk chunk)`
`void`	`leaveGroup(IFFChunk chunk)`
`java.util.ArrayList<ColorCyclingMemoryImageSource>`	`produce()` Processes the input stream and creates a vector of ColorCyclingMemoryImageSource instances.
`void`	`registerChunks(IFFParser iff)`
`static int`	`unpackByteRun1(byte[] in, byte[] out)` ByteRun1 run decoder.
`void`	`unpackVertical(byte[] in, BitmapImage bm)` Vertical run decoder.
`void`	`visitChunk(IFFChunk group, IFFChunk chunk)`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

ILBM_ID

protected static final int ILBM_ID

Chunk ID's.

BMHD_ID

protected static final int BMHD_ID

CMAP_ID

protected static final int CMAP_ID

CAMG_ID

protected static final int CAMG_ID

CRNG_ID

protected static final int CRNG_ID

DRNG_ID

protected static final int DRNG_ID

BODY_ID

protected static final int BODY_ID