src/share/classes/com/sun/imageio/plugins/jpeg/SOFMarkerSegment.java - platform/external/jetbrains/jdk8u_jdk - Git at Google

 /*
  * Copyright (c) 2001, 2013, 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.
  */

 package com.sun.imageio.plugins.jpeg;

 //import javax.imageio.IIOException;
 import javax.imageio.metadata.IIOInvalidTreeException;
 import javax.imageio.metadata.IIOMetadataNode;
 import javax.imageio.stream.ImageOutputStream;

 import java.io.IOException;

 import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;
 import org.w3c.dom.NamedNodeMap;

 /**
  * An SOF (Start Of Frame)  marker segment.
  */
 class SOFMarkerSegment extends MarkerSegment {
     int samplePrecision;
     int numLines;
     int samplesPerLine;
     ComponentSpec [] componentSpecs;  // Array size is num components

     SOFMarkerSegment(boolean wantProg,
                      boolean wantExtended,
                      boolean willSubsample,
                      byte[] componentIDs,
                      int numComponents) {
         super(wantProg ? JPEG.SOF2
               : wantExtended ? JPEG.SOF1
               : JPEG.SOF0);
         samplePrecision = 8;
         numLines = 0;
         samplesPerLine = 0;
         componentSpecs = new ComponentSpec[numComponents];
         for(int i = 0; i < numComponents; i++) {
             int factor = 1;
             int qsel = 0;
             if (willSubsample) {
                 factor = 2;
                 if ((i == 1) || (i == 2)) {
                     factor = 1;
                     qsel = 1;
                 }
             }
             componentSpecs[i] = new ComponentSpec(componentIDs[i], factor, qsel);
         }
     }

     SOFMarkerSegment(JPEGBuffer buffer) throws IOException{
         super(buffer);
         samplePrecision = buffer.buf[buffer.bufPtr++];
         numLines = (buffer.buf[buffer.bufPtr++] & 0xff) << 8;
         numLines |= buffer.buf[buffer.bufPtr++] & 0xff;
         samplesPerLine = (buffer.buf[buffer.bufPtr++] & 0xff) << 8;
         samplesPerLine |= buffer.buf[buffer.bufPtr++] & 0xff;
         int numComponents = buffer.buf[buffer.bufPtr++] & 0xff;
         componentSpecs = new ComponentSpec [numComponents];
         for (int i = 0; i < numComponents; i++) {
             componentSpecs[i] = new ComponentSpec(buffer);
         }
         buffer.bufAvail -= length;
     }

     SOFMarkerSegment(Node node) throws IIOInvalidTreeException {
         // All attributes are optional, so setup defaults first
         super(JPEG.SOF0);
         samplePrecision = 8;
         numLines = 0;
         samplesPerLine = 0;
         updateFromNativeNode(node, true);
     }

     protected Object clone() {
         SOFMarkerSegment newGuy = (SOFMarkerSegment) super.clone();
         if (componentSpecs != null) {
             newGuy.componentSpecs = (ComponentSpec []) componentSpecs.clone();
             for (int i = 0; i < componentSpecs.length; i++) {
                 newGuy.componentSpecs[i] =
                     (ComponentSpec) componentSpecs[i].clone();
             }
         }
         return newGuy;
     }

     IIOMetadataNode getNativeNode() {
         IIOMetadataNode node = new IIOMetadataNode("sof");
         node.setAttribute("process", Integer.toString(tag-JPEG.SOF0));
         node.setAttribute("samplePrecision",
                           Integer.toString(samplePrecision));
         node.setAttribute("numLines",
                           Integer.toString(numLines));
         node.setAttribute("samplesPerLine",
                           Integer.toString(samplesPerLine));
         node.setAttribute("numFrameComponents",
                           Integer.toString(componentSpecs.length));
         for (int i = 0; i < componentSpecs.length; i++) {
             node.appendChild(componentSpecs[i].getNativeNode());
         }

         return node;
     }

     void updateFromNativeNode(Node node, boolean fromScratch)
         throws IIOInvalidTreeException {
         NamedNodeMap attrs = node.getAttributes();
         int value = getAttributeValue(node, attrs, "process", 0, 2, false);
         tag = (value != -1) ? value+JPEG.SOF0 : tag;
         // If samplePrecision is present, it must be 8.
         // This just checks.  We don't bother to assign the value.
         value = getAttributeValue(node, attrs, "samplePrecision", 8, 8, false);
         value = getAttributeValue(node, attrs, "numLines", 0, 65535, false);
         numLines = (value != -1) ? value : numLines;
         value = getAttributeValue(node, attrs, "samplesPerLine", 0, 65535, false);
         samplesPerLine = (value != -1) ? value : samplesPerLine;
         int numComponents = getAttributeValue(node, attrs, "numFrameComponents",
                                               1, 4, false);
         NodeList children = node.getChildNodes();
         if (children.getLength() != numComponents) {
             throw new IIOInvalidTreeException
                 ("numFrameComponents must match number of children", node);
         }
         componentSpecs = new ComponentSpec [numComponents];
         for (int i = 0; i < numComponents; i++) {
             componentSpecs[i] = new ComponentSpec(children.item(i));
         }
     }

     /**
      * Writes the data for this segment to the stream in
      * valid JPEG format.
      */
     void write(ImageOutputStream ios) throws IOException {
         // We don't write SOF segments; the IJG library does.
     }

     void print () {
         printTag("SOF");
         System.out.print("Sample precision: ");
         System.out.println(samplePrecision);
         System.out.print("Number of lines: ");
         System.out.println(numLines);
         System.out.print("Samples per line: ");
         System.out.println(samplesPerLine);
         System.out.print("Number of components: ");
         System.out.println(componentSpecs.length);
         for(int i = 0; i<componentSpecs.length; i++) {
             componentSpecs[i].print();
         }
     }

     int getIDencodedCSType () {
         for (int i = 0; i < componentSpecs.length; i++) {
             if (componentSpecs[i].componentId < 'A') {
                 return JPEG.JCS_UNKNOWN;
             }
         }
         switch(componentSpecs.length) {
         case 3:
             if ((componentSpecs[0].componentId == 'R')
                 &&(componentSpecs[0].componentId == 'G')
                 &&(componentSpecs[0].componentId == 'B')) {
                 return JPEG.JCS_RGB;
             }
             if ((componentSpecs[0].componentId == 'Y')
                 &&(componentSpecs[0].componentId == 'C')
                 &&(componentSpecs[0].componentId == 'c')) {
                 return JPEG.JCS_YCC;
             }
             break;
         case 4:
             if ((componentSpecs[0].componentId == 'R')
                 &&(componentSpecs[0].componentId == 'G')
                 &&(componentSpecs[0].componentId == 'B')
                 &&(componentSpecs[0].componentId == 'A')) {
                 return JPEG.JCS_RGBA;
             }
             if ((componentSpecs[0].componentId == 'Y')
                 &&(componentSpecs[0].componentId == 'C')
                 &&(componentSpecs[0].componentId == 'c')
                 &&(componentSpecs[0].componentId == 'A')) {
                 return JPEG.JCS_YCCA;
             }
         }

         return JPEG.JCS_UNKNOWN;
     }

     ComponentSpec getComponentSpec(byte id, int factor, int qSelector) {
         return new ComponentSpec(id, factor, qSelector);
     }

     /**
      * A component spec within an SOF marker segment.
      */
     class ComponentSpec implements Cloneable {
         int componentId;
         int HsamplingFactor;
         int VsamplingFactor;
         int QtableSelector;

         ComponentSpec(byte id, int factor, int qSelector) {
             componentId = id;
             HsamplingFactor = factor;
             VsamplingFactor = factor;
             QtableSelector = qSelector;
         }

         ComponentSpec(JPEGBuffer buffer) {
             // Parent already did a loadBuf
             componentId = buffer.buf[buffer.bufPtr++];
             HsamplingFactor = buffer.buf[buffer.bufPtr] >>> 4;
             VsamplingFactor = buffer.buf[buffer.bufPtr++] & 0xf;
             QtableSelector = buffer.buf[buffer.bufPtr++];
         }

         ComponentSpec(Node node) throws IIOInvalidTreeException {
             NamedNodeMap attrs = node.getAttributes();
             componentId = getAttributeValue(node, attrs, "componentId", 0, 255, true);
             HsamplingFactor = getAttributeValue(node, attrs, "HsamplingFactor",
                                                 1, 255, true);
             VsamplingFactor = getAttributeValue(node, attrs, "VsamplingFactor",
                                                 1, 255, true);
             QtableSelector = getAttributeValue(node, attrs, "QtableSelector",
                                                0, 3, true);
         }

         protected Object clone() {
             try {
                 return super.clone();
             } catch (CloneNotSupportedException e) {} // won't happen
             return null;
         }

         IIOMetadataNode getNativeNode() {
             IIOMetadataNode node = new IIOMetadataNode("componentSpec");
             node.setAttribute("componentId",
                               Integer.toString(componentId));
             node.setAttribute("HsamplingFactor",
                               Integer.toString(HsamplingFactor));
             node.setAttribute("VsamplingFactor",
                               Integer.toString(VsamplingFactor));
             node.setAttribute("QtableSelector",
                               Integer.toString(QtableSelector));
             return node;
         }

         void print () {
             System.out.print("Component ID: ");
             System.out.println(componentId);
             System.out.print("H sampling factor: ");
             System.out.println(HsamplingFactor);
             System.out.print("V sampling factor: ");
             System.out.println(VsamplingFactor);
             System.out.print("Q table selector: ");
             System.out.println(QtableSelector);
         }
     }

 }
	/*
	* Copyright (c) 2001, 2013, 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.
	*/

	package com.sun.imageio.plugins.jpeg;

	//import javax.imageio.IIOException;
	import javax.imageio.metadata.IIOInvalidTreeException;
	import javax.imageio.metadata.IIOMetadataNode;
	import javax.imageio.stream.ImageOutputStream;

	import java.io.IOException;

	import org.w3c.dom.Node;
	import org.w3c.dom.NodeList;
	import org.w3c.dom.NamedNodeMap;

	/**
	* An SOF (Start Of Frame) marker segment.
	*/
	class SOFMarkerSegment extends MarkerSegment {
	int samplePrecision;
	int numLines;
	int samplesPerLine;
	ComponentSpec [] componentSpecs; // Array size is num components

	SOFMarkerSegment(boolean wantProg,
	boolean wantExtended,
	boolean willSubsample,
	byte[] componentIDs,
	int numComponents) {
	super(wantProg ? JPEG.SOF2
	: wantExtended ? JPEG.SOF1
	: JPEG.SOF0);
	samplePrecision = 8;
	numLines = 0;
	samplesPerLine = 0;
	componentSpecs = new ComponentSpec[numComponents];
	for(int i = 0; i < numComponents; i++) {
	int factor = 1;
	int qsel = 0;
	if (willSubsample) {
	factor = 2;
	if ((i == 1) \|\| (i == 2)) {
	factor = 1;
	qsel = 1;
	}
	}
	componentSpecs[i] = new ComponentSpec(componentIDs[i], factor, qsel);
	}
	}

	SOFMarkerSegment(JPEGBuffer buffer) throws IOException{
	super(buffer);
	samplePrecision = buffer.buf[buffer.bufPtr++];
	numLines = (buffer.buf[buffer.bufPtr++] & 0xff) << 8;
	numLines \|= buffer.buf[buffer.bufPtr++] & 0xff;
	samplesPerLine = (buffer.buf[buffer.bufPtr++] & 0xff) << 8;
	samplesPerLine \|= buffer.buf[buffer.bufPtr++] & 0xff;
	int numComponents = buffer.buf[buffer.bufPtr++] & 0xff;
	componentSpecs = new ComponentSpec [numComponents];
	for (int i = 0; i < numComponents; i++) {
	componentSpecs[i] = new ComponentSpec(buffer);
	}
	buffer.bufAvail -= length;
	}

	SOFMarkerSegment(Node node) throws IIOInvalidTreeException {
	// All attributes are optional, so setup defaults first
	super(JPEG.SOF0);
	samplePrecision = 8;
	numLines = 0;
	samplesPerLine = 0;
	updateFromNativeNode(node, true);
	}

	protected Object clone() {
	SOFMarkerSegment newGuy = (SOFMarkerSegment) super.clone();
	if (componentSpecs != null) {
	newGuy.componentSpecs = (ComponentSpec []) componentSpecs.clone();
	for (int i = 0; i < componentSpecs.length; i++) {
	newGuy.componentSpecs[i] =
	(ComponentSpec) componentSpecs[i].clone();
	}
	}
	return newGuy;
	}

	IIOMetadataNode getNativeNode() {
	IIOMetadataNode node = new IIOMetadataNode("sof");
	node.setAttribute("process", Integer.toString(tag-JPEG.SOF0));
	node.setAttribute("samplePrecision",
	Integer.toString(samplePrecision));
	node.setAttribute("numLines",
	Integer.toString(numLines));
	node.setAttribute("samplesPerLine",
	Integer.toString(samplesPerLine));
	node.setAttribute("numFrameComponents",
	Integer.toString(componentSpecs.length));
	for (int i = 0; i < componentSpecs.length; i++) {
	node.appendChild(componentSpecs[i].getNativeNode());
	}

	return node;
	}

	void updateFromNativeNode(Node node, boolean fromScratch)
	throws IIOInvalidTreeException {
	NamedNodeMap attrs = node.getAttributes();
	int value = getAttributeValue(node, attrs, "process", 0, 2, false);
	tag = (value != -1) ? value+JPEG.SOF0 : tag;
	// If samplePrecision is present, it must be 8.
	// This just checks. We don't bother to assign the value.
	value = getAttributeValue(node, attrs, "samplePrecision", 8, 8, false);
	value = getAttributeValue(node, attrs, "numLines", 0, 65535, false);
	numLines = (value != -1) ? value : numLines;
	value = getAttributeValue(node, attrs, "samplesPerLine", 0, 65535, false);
	samplesPerLine = (value != -1) ? value : samplesPerLine;
	int numComponents = getAttributeValue(node, attrs, "numFrameComponents",
	1, 4, false);
	NodeList children = node.getChildNodes();
	if (children.getLength() != numComponents) {
	throw new IIOInvalidTreeException
	("numFrameComponents must match number of children", node);
	}
	componentSpecs = new ComponentSpec [numComponents];
	for (int i = 0; i < numComponents; i++) {
	componentSpecs[i] = new ComponentSpec(children.item(i));
	}
	}

	/**
	* Writes the data for this segment to the stream in
	* valid JPEG format.
	*/
	void write(ImageOutputStream ios) throws IOException {
	// We don't write SOF segments; the IJG library does.
	}

	void print () {
	printTag("SOF");
	System.out.print("Sample precision: ");
	System.out.println(samplePrecision);
	System.out.print("Number of lines: ");
	System.out.println(numLines);
	System.out.print("Samples per line: ");
	System.out.println(samplesPerLine);
	System.out.print("Number of components: ");
	System.out.println(componentSpecs.length);
	for(int i = 0; i<componentSpecs.length; i++) {
	componentSpecs[i].print();
	}
	}

	int getIDencodedCSType () {
	for (int i = 0; i < componentSpecs.length; i++) {
	if (componentSpecs[i].componentId < 'A') {
	return JPEG.JCS_UNKNOWN;
	}
	}
	switch(componentSpecs.length) {
	case 3:
	if ((componentSpecs[0].componentId == 'R')
	&&(componentSpecs[0].componentId == 'G')
	&&(componentSpecs[0].componentId == 'B')) {
	return JPEG.JCS_RGB;
	}
	if ((componentSpecs[0].componentId == 'Y')
	&&(componentSpecs[0].componentId == 'C')
	&&(componentSpecs[0].componentId == 'c')) {
	return JPEG.JCS_YCC;
	}
	break;
	case 4:
	if ((componentSpecs[0].componentId == 'R')
	&&(componentSpecs[0].componentId == 'G')
	&&(componentSpecs[0].componentId == 'B')
	&&(componentSpecs[0].componentId == 'A')) {
	return JPEG.JCS_RGBA;
	}
	if ((componentSpecs[0].componentId == 'Y')
	&&(componentSpecs[0].componentId == 'C')
	&&(componentSpecs[0].componentId == 'c')
	&&(componentSpecs[0].componentId == 'A')) {
	return JPEG.JCS_YCCA;
	}
	}

	return JPEG.JCS_UNKNOWN;
	}

	ComponentSpec getComponentSpec(byte id, int factor, int qSelector) {
	return new ComponentSpec(id, factor, qSelector);
	}

	/**
	* A component spec within an SOF marker segment.
	*/
	class ComponentSpec implements Cloneable {
	int componentId;
	int HsamplingFactor;
	int VsamplingFactor;
	int QtableSelector;

	ComponentSpec(byte id, int factor, int qSelector) {
	componentId = id;
	HsamplingFactor = factor;
	VsamplingFactor = factor;
	QtableSelector = qSelector;
	}

	ComponentSpec(JPEGBuffer buffer) {
	// Parent already did a loadBuf
	componentId = buffer.buf[buffer.bufPtr++];
	HsamplingFactor = buffer.buf[buffer.bufPtr] >>> 4;
	VsamplingFactor = buffer.buf[buffer.bufPtr++] & 0xf;
	QtableSelector = buffer.buf[buffer.bufPtr++];
	}

	ComponentSpec(Node node) throws IIOInvalidTreeException {
	NamedNodeMap attrs = node.getAttributes();
	componentId = getAttributeValue(node, attrs, "componentId", 0, 255, true);
	HsamplingFactor = getAttributeValue(node, attrs, "HsamplingFactor",
	1, 255, true);
	VsamplingFactor = getAttributeValue(node, attrs, "VsamplingFactor",
	1, 255, true);
	QtableSelector = getAttributeValue(node, attrs, "QtableSelector",
	0, 3, true);
	}

	protected Object clone() {
	try {
	return super.clone();
	} catch (CloneNotSupportedException e) {} // won't happen
	return null;
	}

	IIOMetadataNode getNativeNode() {
	IIOMetadataNode node = new IIOMetadataNode("componentSpec");
	node.setAttribute("componentId",
	Integer.toString(componentId));
	node.setAttribute("HsamplingFactor",
	Integer.toString(HsamplingFactor));
	node.setAttribute("VsamplingFactor",
	Integer.toString(VsamplingFactor));
	node.setAttribute("QtableSelector",
	Integer.toString(QtableSelector));
	return node;
	}

	void print () {
	System.out.print("Component ID: ");
	System.out.println(componentId);
	System.out.print("H sampling factor: ");
	System.out.println(HsamplingFactor);
	System.out.print("V sampling factor: ");
	System.out.println(VsamplingFactor);
	System.out.print("Q table selector: ");
	System.out.println(QtableSelector);
	}
	}

	}