JDK14/Java14源码在线阅读
/*
* Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* ****************************************************************
******************************************************************
******************************************************************
*** COPYRIGHT (c) Eastman Kodak Company, 1997
*** As an unpublished work pursuant to Title 17 of the United
*** States Code. All rights reserved.
******************************************************************
******************************************************************
******************************************************************/
package java.awt.image;
import java.awt.Rectangle;
import java.awt.Point;
/**
* This class extends Raster to provide pixel writing capabilities.
* Refer to the class comment for Raster for descriptions of how
* a Raster stores pixels.
*
* <p> The constructors of this class are protected. To instantiate
* a WritableRaster, use one of the createWritableRaster factory methods
* in the Raster class.
*/
public class WritableRaster extends Raster {
/**
* Constructs a WritableRaster with the given SampleModel. The
* WritableRaster's upper left corner is origin and it is the
* same size as the SampleModel. A DataBuffer large enough to
* describe the WritableRaster is automatically created.
* @param sampleModel The SampleModel that specifies the layout.
* @param origin The Point that specifies the origin.
* @throws RasterFormatException if computing either
* {@code origin.x + sampleModel.getWidth()} or
* {@code origin.y + sampleModel.getHeight()} results
* in integer overflow
*/
protected WritableRaster(SampleModel sampleModel,
Point origin) {
this(sampleModel,
sampleModel.createDataBuffer(),
new Rectangle(origin.x,
origin.y,
sampleModel.getWidth(),
sampleModel.getHeight()),
origin,
null);
}
/**
* Constructs a WritableRaster with the given SampleModel and DataBuffer.
* The WritableRaster's upper left corner is origin and it is the same
* size as the SampleModel. The DataBuffer is not initialized and must
* be compatible with SampleModel.
* @param sampleModel The SampleModel that specifies the layout.
* @param dataBuffer The DataBuffer that contains the image data.
* @param origin The Point that specifies the origin.
* @throws RasterFormatException if computing either
* {@code origin.x + sampleModel.getWidth()} or
* {@code origin.y + sampleModel.getHeight()} results
* in integer overflow
*/
protected WritableRaster(SampleModel sampleModel,
DataBuffer dataBuffer,
Point origin) {
this(sampleModel,
dataBuffer,
new Rectangle(origin.x,
origin.y,
sampleModel.getWidth(),
sampleModel.getHeight()),
origin,
null);
}
/**
* Constructs a WritableRaster with the given SampleModel, DataBuffer,
* and parent. aRegion specifies the bounding rectangle of the new
* Raster. When translated into the base Raster's coordinate
* system, aRegion must be contained by the base Raster.
* (The base Raster is the Raster's ancestor which has no parent.)
* sampleModelTranslate specifies the sampleModelTranslateX and
* sampleModelTranslateY values of the new Raster.
*
* Note that this constructor should generally be called by other
* constructors or create methods, it should not be used directly.
* @param sampleModel The SampleModel that specifies the layout.
* @param dataBuffer The DataBuffer that contains the image data.
* @param aRegion The Rectangle that specifies the image area.
* @param sampleModelTranslate The Point that specifies the translation
* from SampleModel to Raster coordinates.
* @param parent The parent (if any) of this raster.
* @throws RasterFormatException if {@code aRegion} has width
* or height less than or equal to zero, or computing either
* {@code aRegion.x + aRegion.width} or
* {@code aRegion.y + aRegion.height} results in integer
* overflow
*/
protected WritableRaster(SampleModel sampleModel,
DataBuffer dataBuffer,
Rectangle aRegion,
Point sampleModelTranslate,
WritableRaster parent){
super(sampleModel,dataBuffer,aRegion,sampleModelTranslate,parent);
}
/** Returns the parent WritableRaster (if any) of this WritableRaster,
* or else null.
* @return the parent of this {@code WritableRaster}, or
* {@code null}.
*/
public WritableRaster getWritableParent() {
return (WritableRaster)parent;
}
/**
* Create a WritableRaster with the same size, SampleModel and DataBuffer
* as this one, but with a different location. The new WritableRaster
* will possess a reference to the current WritableRaster, accessible
* through its getParent() and getWritableParent() methods.
*
* @param childMinX X coord of the upper left corner of the new Raster.
* @param childMinY Y coord of the upper left corner of the new Raster.
* @return a {@code WritableRaster} the same as this one except
* for the specified location.
* @throws RasterFormatException if computing either
* {@code childMinX + this.getWidth()} or
* {@code childMinY + this.getHeight()} results in integer
* overflow
*/
public WritableRaster createWritableTranslatedChild(int childMinX,
int childMinY) {
return createWritableChild(minX,minY,width,height,
childMinX,childMinY,null);
}
/**
* Returns a new WritableRaster which shares all or part of this
* WritableRaster's DataBuffer. The new WritableRaster will
* possess a reference to the current WritableRaster, accessible
* through its getParent() and getWritableParent() methods.
*
* <p> The parentX, parentY, width and height parameters form a
* Rectangle in this WritableRaster's coordinate space, indicating
* the area of pixels to be shared. An error will be thrown if
* this Rectangle is not contained with the bounds of the current
* WritableRaster.
*
* <p> The new WritableRaster may additionally be translated to a
* different coordinate system for the plane than that used by the current
* WritableRaster. The childMinX and childMinY parameters give
* the new (x, y) coordinate of the upper-left pixel of the
* returned WritableRaster; the coordinate (childMinX, childMinY)
* in the new WritableRaster will map to the same pixel as the
* coordinate (parentX, parentY) in the current WritableRaster.
*
* <p> The new WritableRaster may be defined to contain only a
* subset of the bands of the current WritableRaster, possibly
* reordered, by means of the bandList parameter. If bandList is
* null, it is taken to include all of the bands of the current
* WritableRaster in their current order.
*
* <p> To create a new WritableRaster that contains a subregion of
* the current WritableRaster, but shares its coordinate system
* and bands, this method should be called with childMinX equal to
* parentX, childMinY equal to parentY, and bandList equal to
* null.
*
* @param parentX X coordinate of the upper left corner in this
* WritableRaster's coordinates.
* @param parentY Y coordinate of the upper left corner in this
* WritableRaster's coordinates.
* @param w Width of the region starting at (parentX, parentY).
* @param h Height of the region starting at (parentX, parentY).
* @param childMinX X coordinate of the upper left corner of
* the returned WritableRaster.
* @param childMinY Y coordinate of the upper left corner of
* the returned WritableRaster.
* @param bandList Array of band indices, or null to use all bands.
* @return a {@code WritableRaster} sharing all or part of the
* {@code DataBuffer} of this {@code WritableRaster}.
* @exception RasterFormatException if the subregion is outside of the
* raster bounds.
* @throws RasterFormatException if {@code w} or
* {@code h}
* is less than or equal to zero, or computing any of
* {@code parentX + w}, {@code parentY + h},
* {@code childMinX + w}, or
* {@code childMinY + h} results in integer
* overflow
*/
public WritableRaster createWritableChild(int parentX, int parentY,
int w, int h,
int childMinX, int childMinY,
int[] bandList) {
if (parentX < this.minX) {
throw new RasterFormatException("parentX lies outside raster");
}
if (parentY < this.minY) {
throw new RasterFormatException("parentY lies outside raster");
}
if ((parentX+w < parentX) || (parentX+w > this.width + this.minX)) {
throw new RasterFormatException("(parentX + width) is outside raster");
}
if ((parentY+h < parentY) || (parentY+h > this.height + this.minY)) {
throw new RasterFormatException("(parentY + height) is outside raster");
}
SampleModel sm;
// Note: the SampleModel for the child Raster should have the same
// width and height as that for the parent, since it represents
// the physical layout of the pixel data. The child Raster's width
// and height represent a "virtual" view of the pixel data, so
// they may be different than those of the SampleModel.
if (bandList != null) {
sm = sampleModel.createSubsetSampleModel(bandList);
}
else {
sm = sampleModel;
}
int deltaX = childMinX - parentX;
int deltaY = childMinY - parentY;
return new WritableRaster(sm,
getDataBuffer(),
new Rectangle(childMinX,childMinY,
w, h),
new Point(sampleModelTranslateX+deltaX,
sampleModelTranslateY+deltaY),
this);
}
/**
* Sets the data for a single pixel from a
* primitive array of type TransferType. For image data supported by
* the Java 2D(tm) API, this will be one of DataBuffer.TYPE_BYTE,
* DataBuffer.TYPE_USHORT, DataBuffer.TYPE_INT, DataBuffer.TYPE_SHORT,
* DataBuffer.TYPE_FLOAT, or DataBuffer.TYPE_DOUBLE. Data in the array
* may be in a packed format, thus increasing efficiency for data
* transfers.
* An ArrayIndexOutOfBoundsException may be thrown if the coordinates are
* not in bounds, or if inData is not large enough to hold the pixel data.
* However, explicit bounds checking is not guaranteed.
* A ClassCastException will be thrown if the input object is not null
* and references anything other than an array of TransferType.
* @see java.awt.image.SampleModel#setDataElements(int, int, Object, DataBuffer)
* @param x The X coordinate of the pixel location.
* @param y The Y coordinate of the pixel location.
* @param inData An object reference to an array of type defined by
* getTransferType() and length getNumDataElements()
* containing the pixel data to place at x,y.
*
* @throws ArrayIndexOutOfBoundsException if the coordinates are not
* in bounds, or if inData is too small to hold the input.
*/
public void setDataElements(int x, int y, Object inData) {
sampleModel.setDataElements(x-sampleModelTranslateX,
y-sampleModelTranslateY,
inData, dataBuffer);
}
/**
* Sets the data for a rectangle of pixels from an input Raster.
* The input Raster must be compatible with this WritableRaster
* in that they must have the same number of bands, corresponding bands
* must have the same number of bits per sample, the TransferTypes
* and NumDataElements must be the same, and the packing used by
* the getDataElements/setDataElements must be identical.
* An ArrayIndexOutOfBoundsException may be thrown if the coordinates are
* not in bounds.
* However, explicit bounds checking is not guaranteed.
* @param x The X coordinate of the pixel location.
* @param y The Y coordinate of the pixel location.
* @param inRaster Raster containing data to place at x,y.
*
* @throws NullPointerException if inRaster is null.
* @throws ArrayIndexOutOfBoundsException if the coordinates are not
* in bounds.
*/
public void setDataElements(int x, int y, Raster inRaster) {
int dstOffX = x+inRaster.getMinX();
int dstOffY = y+inRaster.getMinY();
int width = inRaster.getWidth();
int height = inRaster.getHeight();
if ((dstOffX < this.minX) || (dstOffY < this.minY) ||
(dstOffX + width > this.minX + this.width) ||
(dstOffY + height > this.minY + this.height)) {
throw new ArrayIndexOutOfBoundsException
("Coordinate out of bounds!");
}
int srcOffX = inRaster.getMinX();
int srcOffY = inRaster.getMinY();
Object tdata = null;
for (int startY=0; startY < height; startY++) {
tdata = inRaster.getDataElements(srcOffX, srcOffY+startY,
width, 1, tdata);
setDataElements(dstOffX, dstOffY+startY,
width, 1, tdata);
}
}
/**
* Sets the data for a rectangle of pixels from a
* primitive array of type TransferType. For image data supported by
* the Java 2D API, this will be one of DataBuffer.TYPE_BYTE,
* DataBuffer.TYPE_USHORT, DataBuffer.TYPE_INT, DataBuffer.TYPE_SHORT,
* DataBuffer.TYPE_FLOAT, or DataBuffer.TYPE_DOUBLE. Data in the array
* may be in a packed format, thus increasing efficiency for data
* transfers.
* An ArrayIndexOutOfBoundsException may be thrown if the coordinates are
* not in bounds, or if inData is not large enough to hold the pixel data.
* However, explicit bounds checking is not guaranteed.
* A ClassCastException will be thrown if the input object is not null
* and references anything other than an array of TransferType.
* @see java.awt.image.SampleModel#setDataElements(int, int, int, int, Object, DataBuffer)
* @param x The X coordinate of the upper left pixel location.
* @param y The Y coordinate of the upper left pixel location.
* @param w Width of the pixel rectangle.
* @param h Height of the pixel rectangle.
* @param inData An object reference to an array of type defined by
* getTransferType() and length w*h*getNumDataElements()
* containing the pixel data to place between x,y and
* x+w-1, y+h-1.
*
* @throws NullPointerException if inData is null.
* @throws ArrayIndexOutOfBoundsException if the coordinates are not
* in bounds, or if inData is too small to hold the input.
*/
public void setDataElements(int x, int y, int w, int h, Object inData) {
sampleModel.setDataElements(x-sampleModelTranslateX,
y-sampleModelTranslateY,
w,h,inData,dataBuffer);
}
/**
* Copies pixels from Raster srcRaster to this WritableRaster. Each pixel
* in srcRaster is copied to the same x,y address in this raster, unless
* the address falls outside the bounds of this raster. srcRaster
* must have the same number of bands as this WritableRaster. The
* copy is a simple copy of source samples to the corresponding destination
* samples.
* <p>
* If all samples of both source and destination Rasters are of
* integral type and less than or equal to 32 bits in size, then calling
* this method is equivalent to executing the following code for all
* {@code x,y} addresses valid in both Rasters.
* <pre>{@code
* Raster srcRaster;
* WritableRaster dstRaster;
* for (int b = 0; b < srcRaster.getNumBands(); b++) {
* dstRaster.setSample(x, y, b, srcRaster.getSample(x, y, b));
* }
* }</pre>
* Thus, when copying an integral type source to an integral type
* destination, if the source sample size is greater than the destination
* sample size for a particular band, the high order bits of the source
* sample are truncated. If the source sample size is less than the
* destination size for a particular band, the high order bits of the
* destination are zero-extended or sign-extended depending on whether
* srcRaster's SampleModel treats the sample as a signed or unsigned
* quantity.
* <p>
* When copying a float or double source to an integral type destination,
* each source sample is cast to the destination type. When copying an
* integral type source to a float or double destination, the source
* is first converted to a 32-bit int (if necessary), using the above
* rules for integral types, and then the int is cast to float or
* double.
*
* @param srcRaster The Raster from which to copy pixels.
*
* @throws NullPointerException if srcRaster is null.
*/
public void setRect(Raster srcRaster) {
setRect(0,0,srcRaster);
}
/**
* Copies pixels from Raster srcRaster to this WritableRaster.
* For each (x, y) address in srcRaster, the corresponding pixel
* is copied to address (x+dx, y+dy) in this WritableRaster,
* unless (x+dx, y+dy) falls outside the bounds of this raster.
* srcRaster must have the same number of bands as this WritableRaster.
* The copy is a simple copy of source samples to the corresponding
* destination samples. For details, see
* {@link WritableRaster#setRect(Raster)}.
*
* @param dx The X translation factor from src space to dst space
* of the copy.
* @param dy The Y translation factor from src space to dst space
* of the copy.
* @param srcRaster The Raster from which to copy pixels.
*
* @throws NullPointerException if srcRaster is null.
*/
public void setRect(int dx, int dy, Raster srcRaster) {
int width = srcRaster.getWidth();
int height = srcRaster.getHeight();
int srcOffX = srcRaster.getMinX();
int srcOffY = srcRaster.getMinY();
int dstOffX = dx+srcOffX;
int dstOffY = dy+srcOffY;
// Clip to this raster
if (dstOffX < this.minX) {
int skipX = this.minX - dstOffX;
width -= skipX;
srcOffX += skipX;
dstOffX = this.minX;
}
if (dstOffY < this.minY) {
int skipY = this.minY - dstOffY;
height -= skipY;
srcOffY += skipY;
dstOffY = this.minY;
}
if (dstOffX+width > this.minX+this.width) {
width = this.minX + this.width - dstOffX;
}
if (dstOffY+height > this.minY+this.height) {
height = this.minY + this.height - dstOffY;
}
if (width <= 0 || height <= 0) {
return;
}
switch (srcRaster.getSampleModel().getDataType()) {
case DataBuffer.TYPE_BYTE:
case DataBuffer.TYPE_SHORT:
case DataBuffer.TYPE_USHORT:
case DataBuffer.TYPE_INT:
int[] iData = null;
for (int startY=0; startY < height; startY++) {
// Grab one scanline at a time
iData =
srcRaster.getPixels(srcOffX, srcOffY+startY, width, 1,
iData);
setPixels(dstOffX, dstOffY+startY, width, 1, iData);
}
break;
case DataBuffer.TYPE_FLOAT:
float[] fData = null;
for (int startY=0; startY < height; startY++) {
fData =
srcRaster.getPixels(srcOffX, srcOffY+startY, width, 1,
fData);
setPixels(dstOffX, dstOffY+startY, width, 1, fData);
}
break;
case DataBuffer.TYPE_DOUBLE:
double[] dData = null;
for (int startY=0; startY < height; startY++) {
// Grab one scanline at a time
dData =
srcRaster.getPixels(srcOffX, srcOffY+startY, width, 1,
dData);
setPixels(dstOffX, dstOffY+startY, width, 1, dData);
}
break;
}
}
/**
* Sets a pixel in the DataBuffer using an int array of samples for input.
* An ArrayIndexOutOfBoundsException may be thrown if the coordinates are
* not in bounds.
* However, explicit bounds checking is not guaranteed.
* @param x The X coordinate of the pixel location.
* @param y The Y coordinate of the pixel location.
* @param iArray The input samples in a int array.
*
* @throws NullPointerException if iArray is null.
* @throws ArrayIndexOutOfBoundsException if the coordinates are not
* in bounds, or if iArray is too small to hold the input.
*/
public void setPixel(int x, int y, int[] iArray) {
sampleModel.setPixel(x-sampleModelTranslateX,y-sampleModelTranslateY,
iArray,dataBuffer);
}
/**
* Sets a pixel in the DataBuffer using a float array of samples for input.
* An ArrayIndexOutOfBoundsException may be thrown if the coordinates are
* not in bounds.
* However, explicit bounds checking is not guaranteed.
* @param x The X coordinate of the pixel location.
* @param y The Y coordinate of the pixel location.
* @param fArray The input samples in a float array.
*
* @throws NullPointerException if fArray is null.
* @throws ArrayIndexOutOfBoundsException if the coordinates are not
* in bounds, or if fArray is too small to hold the input.
*/
public void setPixel(int x, int y, float[] fArray) {
sampleModel.setPixel(x-sampleModelTranslateX,y-sampleModelTranslateY,
fArray,dataBuffer);
}
/**
* Sets a pixel in the DataBuffer using a double array of samples for input.
* An ArrayIndexOutOfBoundsException may be thrown if the coordinates are
* not in bounds.
* However, explicit bounds checking is not guaranteed.
* @param x The X coordinate of the pixel location.
* @param y The Y coordinate of the pixel location.
* @param dArray The input samples in a double array.
*
* @throws NullPointerException if dArray is null.
* @throws ArrayIndexOutOfBoundsException if the coordinates are not
* in bounds, or if dArray is too small to hold the input.
*/
public void setPixel(int x, int y, double[] dArray) {
sampleModel.setPixel(x-sampleModelTranslateX,y-sampleModelTranslateY,
dArray,dataBuffer);
}
/**
* Sets all samples for a rectangle of pixels from an int array containing
* one sample per array element.
* An ArrayIndexOutOfBoundsException may be thrown if the coordinates are
* not in bounds.
* However, explicit bounds checking is not guaranteed.
* @param x The X coordinate of the upper left pixel location.
* @param y The Y coordinate of the upper left pixel location.
* @param w Width of the pixel rectangle.
* @param h Height of the pixel rectangle.
* @param iArray The input int pixel array.
*
* @throws NullPointerException if iArray is null.
* @throws ArrayIndexOutOfBoundsException if the coordinates are not
* in bounds, or if iArray is too small to hold the input.
*/
public void setPixels(int x, int y, int w, int h, int[] iArray) {
sampleModel.setPixels(x-sampleModelTranslateX,y-sampleModelTranslateY,
w,h,iArray,dataBuffer);
}
/**
* Sets all samples for a rectangle of pixels from a float array containing
* one sample per array element.
* An ArrayIndexOutOfBoundsException may be thrown if the coordinates are
* not in bounds.
* However, explicit bounds checking is not guaranteed.
* @param x The X coordinate of the upper left pixel location.
* @param y The Y coordinate of the upper left pixel location.
* @param w Width of the pixel rectangle.
* @param h Height of the pixel rectangle.
* @param fArray The input float pixel array.
*
* @throws NullPointerException if fArray is null.
* @throws ArrayIndexOutOfBoundsException if the coordinates are not
* in bounds, or if fArray is too small to hold the input.
*/
public void setPixels(int x, int y, int w, int h, float[] fArray) {
sampleModel.setPixels(x-sampleModelTranslateX,y-sampleModelTranslateY,
w,h,fArray,dataBuffer);
}
/**
* Sets all samples for a rectangle of pixels from a double array containing
* one sample per array element.
* An ArrayIndexOutOfBoundsException may be thrown if the coordinates are
* not in bounds.
* However, explicit bounds checking is not guaranteed.
* @param x The X coordinate of the upper left pixel location.
* @param y The Y coordinate of the upper left pixel location.
* @param w Width of the pixel rectangle.
* @param h Height of the pixel rectangle.
* @param dArray The input double pixel array.
*
* @throws NullPointerException if dArray is null.
* @throws ArrayIndexOutOfBoundsException if the coordinates are not
* in bounds, or if dArray is too small to hold the input.
*/
public void setPixels(int x, int y, int w, int h, double[] dArray) {
sampleModel.setPixels(x-sampleModelTranslateX,y-sampleModelTranslateY,
w,h,dArray,dataBuffer);
}
/**
* Sets a sample in the specified band for the pixel located at (x,y)
* in the DataBuffer using an int for input.
* An ArrayIndexOutOfBoundsException may be thrown if the coordinates are
* not in bounds.
* However, explicit bounds checking is not guaranteed.
* @param x The X coordinate of the pixel location.
* @param y The Y coordinate of the pixel location.
* @param b The band to set.
* @param s The input sample.
*
* @throws ArrayIndexOutOfBoundsException if the coordinates or
* the band index are not in bounds.
*/
public void setSample(int x, int y, int b, int s) {
sampleModel.setSample(x-sampleModelTranslateX,
y-sampleModelTranslateY, b, s,
dataBuffer);
}
/**
* Sets a sample in the specified band for the pixel located at (x,y)
* in the DataBuffer using a float for input.
* An ArrayIndexOutOfBoundsException may be thrown if the coordinates are
* not in bounds.
* However, explicit bounds checking is not guaranteed.
* @param x The X coordinate of the pixel location.
* @param y The Y coordinate of the pixel location.
* @param b The band to set.
* @param s The input sample as a float.
*
* @throws ArrayIndexOutOfBoundsException if the coordinates or
* the band index are not in bounds.
*/
public void setSample(int x, int y, int b, float s){
sampleModel.setSample(x-sampleModelTranslateX,y-sampleModelTranslateY,
b,s,dataBuffer);
}
/**
* Sets a sample in the specified band for the pixel located at (x,y)
* in the DataBuffer using a double for input.
* An ArrayIndexOutOfBoundsException may be thrown if the coordinates are
* not in bounds.
* However, explicit bounds checking is not guaranteed.
* @param x The X coordinate of the pixel location.
* @param y The Y coordinate of the pixel location.
* @param b The band to set.
* @param s The input sample as a double.
*
* @throws ArrayIndexOutOfBoundsException if the coordinates or
* the band index are not in bounds.
*/
public void setSample(int x, int y, int b, double s){
sampleModel.setSample(x-sampleModelTranslateX,y-sampleModelTranslateY,
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