/*
* @(#)RGBFormat.java 1.35 02/08/21
*
* Copyright (c) 1996-2002 Sun Microsystems, Inc. All rights reserved.
*/
package javax.media.format;
import java.awt.Dimension;
import javax.media.Format;
/**
* Describes uncompressed RGB data. The data is in
* interleaved form. RGB components can be packed into
* a short or an int. If the pixel components are packed, then the
* <CODE>redMask</CODE>, <CODE>greenMask</CODE> and <CODE>blueMask</CODE> fields
* specify the bit masks, otherwise
* they specify the order of arrangement of the components. For example:
* <UL>
* <LI>32-bit packed RGB stored as 32-bit integers would have
* the following masks: redMask = 0x00FF0000, greenMask = 0x0000FF00,
* blueMask = 0x000000FF. </LI>
* <LI>24-bit RGB stored as bytes would have the following masks:
* redMask = 1, greenMask = 2, blueMask = 3 and pixelStride = 3.</LI>
* </UL>
* @since JMF 2.0
*/
public class RGBFormat extends VideoFormat {
/** Mask value for the Red component. */
protected int redMask = NOT_SPECIFIED;
/** Mask value for the Green component. */
protected int greenMask = NOT_SPECIFIED;
/** Mask value for the Blue component. */
protected int blueMask = NOT_SPECIFIED;
/**
* The number of bits required to represent a pixel, including all three
* color components.
*/
protected int bitsPerPixel = NOT_SPECIFIED;
/** Increment value of the array index from one pixel to the next. */
protected int pixelStride = NOT_SPECIFIED;
/**
* Increment value of the array index from the first pixel on line n
* to the first pixel on line n+1.
*/
protected int lineStride = NOT_SPECIFIED;
/** Indicates whether or not the lines in the video frame are flipped vertically
* (upside down).
*/
protected int flipped = NOT_SPECIFIED;
/** Endian ordering of the data where applicable */
protected int endian = NOT_SPECIFIED;
public static final int BIG_ENDIAN = 0;
public static final int LITTLE_ENDIAN = 1;
private static String ENCODING = VideoFormat.RGB;
/**
* Constructs a default <CODE>RGBFormat</CODE>.
*/
public RGBFormat() {
super(ENCODING);
dataType = null;
}
/**
* Constructs an <CODE>RGBFormat</CODE> object with the specified properties.
* The pixel stride is
* initialized to the default for the specified data type and bits per pixel.
* The line stride is initialized using the default pixel stride and specified frame
* width.
* The image is not flipped and the endian is LITTLE_ENDIAN.
* @param size A <CODE>Dimension</CODE> that specifies the frame size.
* @param maxDataLength The maximum length of a data chunk.
* @param dataType The type of the data. For example, byte array.
* @param frameRate The frame rate.
* @param bitsPerPixel The number of bits representing a pixel.
* @param red The mask for the red color component.
* @param green The mask for the green color component.
* @param blue The mask for the blue color component.
*/
public RGBFormat(Dimension size, int maxDataLength, Class dataType,
float frameRate,
int bitsPerPixel,
int red, int green, int blue) {
super(ENCODING, size, maxDataLength, dataType, frameRate);
this.bitsPerPixel = bitsPerPixel;
this.redMask = red;
this.greenMask = green;
this.blueMask = blue;
if (bitsPerPixel != NOT_SPECIFIED && dataType != null) {
pixelStride = bitsPerPixel / 8;
if (dataType != byteArray)
pixelStride = 1;
} else {
pixelStride = NOT_SPECIFIED;
}
if (size != null && pixelStride != NOT_SPECIFIED)
lineStride = pixelStride * size.width;
else
lineStride = NOT_SPECIFIED;
flipped = FALSE;
if (bitsPerPixel == 16 && dataType == byteArray)
endian = LITTLE_ENDIAN;
else
endian = NOT_SPECIFIED;
}
/**
* Constructs an <CODE>RGBFormat</CODE> object with the specified properties.
* @param size A <CODE>Dimension</CODE> that specifies the frame size.
* @param maxDataLength The maximum length of a data chunk.
* @param dataType The type of the data. For example, byte array.
* @param frameRate The frame rate.
* @param bitsPerPixel The number of bits representing a pixel.
* @param red The mask for the red color component.
* @param green The mask for the green color component.
* @param blue The mask for the blue color component.
* @param pixelStride The number of array elements between adjacent pixels.
* @param flipped Indicates whether or not the lines in the video frame are
* flipped vertically (upside down). <CODE>Format.TRUE</CODE> indicates the image is flipped,
* <CODE>Format.FALSE</CODE> indicates that it is not.
* @param endian The byte ordering used for this
* <code>RGBFormat</code>--<CODE>BIG_ENDIAN</CODE> or <CODE>LITTLE_ENDIAN</CODE>.
*/
public RGBFormat(Dimension size, int maxDataLength, Class dataType,
float frameRate,
int bitsPerPixel,
int red, int green, int blue,
int pixelStride, int lineStride, int flipped, int endian) {
super(ENCODING, size, maxDataLength, dataType, frameRate);
this.bitsPerPixel = bitsPerPixel;
this.redMask = red;
this.greenMask = green;
this.blueMask = blue;
this.pixelStride = pixelStride;
this.lineStride = lineStride;
this.flipped = flipped;
this.endian = endian;
}
/**
* Gets the number of bits required per pixel of data.
* @return An integer representing the number of bits per pixel.
*/
public int getBitsPerPixel() {
return bitsPerPixel;
}
/**
* Gets the mask for the red component.
* @return The red mask.
*/
public int getRedMask() {
return redMask;
}
/**
* Gets the mask for the green component.
* @return The green mask.
*/
public int getGreenMask() {
return greenMask;
}
/**
* Gets the mask for the blue component.
* @return The blue mask.
*/
public int getBlueMask() {
return blueMask;
}
/**
* Gets the pixel stride--the number of array elements between adjacent pixels.
* @return An integer representing the pixel stride.
*/
public int getPixelStride() {
return pixelStride;
}
/**
* Gets the line stride--the number of array elements between adjacent rows of pixels.
* @return An integer representing the line stride.
*/
public int getLineStride() {
return lineStride;
}
/**
* Checks whether or not the video image is vertically flipped.
*
* @return <CODE>Format.TRUE</CODE> if the video is flipped, <CODE>Format.FALSE</CODE>
* if it is not.
*/
public int getFlipped() {
return flipped;
}
/**
* Gets the endian ordering of the data for unpacked 16-bit data.
* @return An integer representing the endian ordering: BIG_ENDIAN, LITTLE_ENDIAN or NOT_SPECIFIED
*/
public int getEndian() {
return endian;
}
/**
* Creates a clone of this <CODE>RGBFormat</CODE>.
* @return A clone of this <CODE>RGBFormat</CODE>.
*/
public Object clone() {
RGBFormat f = new RGBFormat(size,
maxDataLength,
dataType,
frameRate,
bitsPerPixel,
redMask,
greenMask,
blueMask,
pixelStride,
lineStride,
flipped,
endian);
f.copy(this);
return f;
}
/**
* Copies the attributes from the specified <CODE>Format</CODE> into
* this <CODE>RGBFormat</CODE>.
* @param f The <CODE>Format</CODE> to copy the attributes from.
*/
protected void copy(Format f) {
super.copy(f);
if (f instanceof RGBFormat) {
RGBFormat other = (RGBFormat) f;
bitsPerPixel = other.bitsPerPixel;
redMask = other.redMask;
greenMask = other.greenMask;
blueMask = other.blueMask;
pixelStride = other.pixelStride;
lineStride = other.lineStride;
flipped = other.flipped;
endian = other.endian;
}
}
/**
* Compares the specified <CODE>Format</CODE> with this <code>RGBFormat</code>.
* Returns <CODE>true</CODE> only if the specified <CODE>Format</CODE>
* is a <CODE>RGBFormat</CODE> object and all of
* its attributes are identical to
* the attributes in this <code>RGBFormat</code>.
* @param format The <CODE>Format</CODE> to compare.
* @return true if the specified <CODE>Format</CODE> is the same as this one.
*/
public boolean equals(Object format) {
if (format instanceof RGBFormat) {
RGBFormat other = (RGBFormat) format;
return super.equals(format) &&
bitsPerPixel == other.bitsPerPixel &&
redMask == other.redMask &&
greenMask == other.greenMask &&
blueMask == other.blueMask &&
pixelStride == other.pixelStride &&
lineStride == other.lineStride &&
endian == other.endian &&
flipped == other.flipped;
} else
return false;
}
/**
* Checks whether or not the specified <CODE>Format</CODE> <EM>matches</EM>
* this <CODE>RGBFormat</CODE>.
* Matches only compares the attributes that are defined in the specified
* <CODE>Format</CODE>,
* unspecified attributes are ignored.
* <p>
* The two <CODE>Format</CODE> objects do not have to be of the same class
* to match. For example, if "A" are "B" are being compared, a
* match is possible if "A" is derived from "B"
* or "B" is derived from "A". (The compared attributes must still match,
* or <CODE>matches</CODE> fails.)
* @param format The <CODE>Format</CODE> to compare with this one.
* @return <CODE>true</CODE> if the specified <CODE>Format</CODE>
* matches this one, <CODE>false</CODE> if it does not.
*/
public boolean matches(Format format) {
if (!super.matches(format))
return false;
if (!(format instanceof RGBFormat))
return true;
RGBFormat other = (RGBFormat) format;
boolean returnVal =
(bitsPerPixel == NOT_SPECIFIED || other.bitsPerPixel == NOT_SPECIFIED ||
bitsPerPixel == other.bitsPerPixel) &&
(redMask == NOT_SPECIFIED || other.redMask == NOT_SPECIFIED ||
redMask == other.redMask) &&
(greenMask == NOT_SPECIFIED || other.greenMask == NOT_SPECIFIED ||
greenMask == other.greenMask) &&
(blueMask == NOT_SPECIFIED || other.blueMask == NOT_SPECIFIED ||
blueMask == other.blueMask) &&
(pixelStride == NOT_SPECIFIED || other.pixelStride == NOT_SPECIFIED ||
pixelStride == other.pixelStride) &&
(endian == NOT_SPECIFIED || other.endian == NOT_SPECIFIED ||
endian == other.endian) &&
(flipped == NOT_SPECIFIED || other.flipped == NOT_SPECIFIED ||
flipped == other.flipped);
return returnVal;
}
/**
* Finds the attributes shared by two matching <CODE>Format</CODE> objects.
* If the specified <CODE>Format</CODE> does not match this one, the result
* is undefined.
* @param The matching <CODE>Format</CODE> to intersect with this
* <CODE>RGBFormat</CODE>.
* @return A <CODE>Format</CODE> object
* with its attributes set to those attributes common to both
* <CODE>Format</CODE> objects.
* @see #matches
*/
public Format intersects(Format format) {
Format fmt;
if ((fmt = super.intersects(format)) == null)
return null;
if (!(format instanceof RGBFormat))
return fmt;
RGBFormat other = (RGBFormat)format;
RGBFormat res = (RGBFormat)fmt;
res.bitsPerPixel = (bitsPerPixel != NOT_SPECIFIED ?
bitsPerPixel : other.bitsPerPixel);
res.pixelStride = (pixelStride != NOT_SPECIFIED ?
pixelStride : other.pixelStride);
res.lineStride = (lineStride != NOT_SPECIFIED ?
lineStride : other.lineStride);
res.redMask = (redMask != NOT_SPECIFIED ?
redMask : other.redMask);
res.greenMask = (greenMask != NOT_SPECIFIED ?
greenMask : other.greenMask);
res.blueMask = (blueMask != NOT_SPECIFIED ?
blueMask : other.blueMask);
res.flipped = (flipped != NOT_SPECIFIED ?
flipped : other.flipped);
res.endian = (endian != NOT_SPECIFIED ?
endian : other.endian);
return res;
}
/**
* Generate a format that's less restrictive than this format but
* contains the basic attributes that will make this resulting format
* useful for format matching.
* @return A <CODE>Format</CODE> that's less restrictive than the
* this format.
*/
public Format relax() {
RGBFormat fmt;
if ((fmt = (RGBFormat)super.relax()) == null)
return null;
fmt.lineStride = NOT_SPECIFIED;
fmt.pixelStride = NOT_SPECIFIED;
return fmt;
}
/**
* Gets a <CODE>String</CODE> representation of the attributes of this
* <CODE>RGBFormat</CODE>.
* For example: "RGB, 352x240, ...".
* @return A <CODE>String</CODE> that describes the format attributes.
*/
public String toString() {
String s = getEncoding().toUpperCase();
if (size != null)
s += ", " + size.width + "x" + size.height;
if (frameRate != NOT_SPECIFIED)
s += ", FrameRate=" + ((int)(frameRate * 10) / 10f);
if (maxDataLength != NOT_SPECIFIED)
s += ", Length=" + maxDataLength;
s += ", " + bitsPerPixel + "-bit";
s += ", Masks=" + redMask + ":" + greenMask + ":" + blueMask;
if (pixelStride != 1)
s += ", PixelStride=" + pixelStride;
s += ", LineStride=" + lineStride;
if (flipped != NOT_SPECIFIED)
s += (flipped == Format.TRUE? ", Flipped" : "");
if (dataType == byteArray && bitsPerPixel == 16 && endian != NOT_SPECIFIED)
s += (endian == BIG_ENDIAN? ", BigEndian" : ", LittleEndian");
if (dataType != null && dataType != Format.byteArray)
s += ", " + dataType;
return s;
}
}
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