[FOray-commit] SF.net SVN: foray: [6872] trunk/foray/foray-ps/src/java/org/foray/ps/encode

Revision: 6872
Author:   victormote
Date:     2006-03-04 04:37:53 -0800 (Sat, 04 Mar 2006)
ViewCVS:  http://svn.sourceforge.net/foray/?rev=6872&view=rev

Log Message:
-----------
1. Create new classes to handle TrueType CMap Format 12 tables (32-bit entries).
2. Create abstract superclass for all CMap classes.

Modified Paths:
--------------
    trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap04.java
    trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap04Entry.java

Added Paths:
-----------
    trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap.java
    trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap12.java
    trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap12Entry.java
Added: trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap.java
===================================================================
--- trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap.java	                        (rev 0)
+++ trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap.java	2006-03-04 12:37:53 UTC (rev 6872)
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2006 The FOray Project.
+ *      http://www.foray.org
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * 
+ * This work is in part derived from the following work(s), used with the
+ * permission of the licensor:
+ *      Apache FOP, licensed by the Apache Software Foundation
+ *
+ */
+
+/* $Id$ */
+
+package org.foray.ps.encode;
+
+/**
+ * Abstract superclass for all CMap Tables.
+ */
+public abstract class CMap extends Encoding {
+
+    public CMap(String name) {
+        super(name);
+    }
+
+}

Modified: trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap04.java
===================================================================
--- trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap04.java	2006-03-04 12:06:03 UTC (rev 6871)
+++ trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap04.java	2006-03-04 12:37:53 UTC (rev 6872)
@@ -25,11 +25,11 @@
 package org.foray.ps.encode;
 
 /**
- * Class containing a set of Unicode ranges that sequentially map to the
+ * Class containing a set of 16-bit Unicode ranges that sequentially map to the
  * same-sized range of glyph indexes. The contents are analogous to a Format 4
  * TrueType Font cmap table (from which this class derives its name).
  */
-public class CMap04 extends Encoding {
+public class CMap04 extends CMap {
 
     private CMap04Entry[] entries;
 

Modified: trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap04Entry.java
===================================================================
--- trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap04Entry.java	2006-03-04 12:06:03 UTC (rev 6871)
+++ trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap04Entry.java	2006-03-04 12:37:53 UTC (rev 6872)
@@ -25,7 +25,8 @@
 package org.foray.ps.encode;
 
 /**
- * Contains one entry from a CMap table.
+ * Contains one entry from a TrueType CMap subtable, format 4, which handles
+ * 16-bit Unicode codepoint ranges.
  */
 public class CMap04Entry {
     public char unicodeStart;

Added: trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap12.java
===================================================================
--- trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap12.java	                        (rev 0)
+++ trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap12.java	2006-03-04 12:37:53 UTC (rev 6872)
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2006 The FOray Project.
+ *      http://www.foray.org
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * 
+ * This work is in part derived from the following work(s), used with the
+ * permission of the licensor:
+ *      Apache FOP, licensed by the Apache Software Foundation
+ *
+ */
+
+/* $Id$ */
+ 
+package org.foray.ps.encode;
+
+/**
+ * Class containing a set of 32-bit Unicode ranges that sequentially map to the
+ * same-sized range of glyph indexes. The contents are analogous to a Format 12
+ * TrueType Font cmap table (from which this class derives its name).
+ */
+public class CMap12 extends CMap {
+
+    private CMap12Entry[] entries;
+
+    private int lastEntryAdded = -1;
+
+    public CMap12 (String name, int expectedEntries) {
+        super(name);
+        this.entries = new CMap12Entry[expectedEntries];
+    }
+
+    public void addEntry(CMap12Entry entry) {
+        lastEntryAdded++;
+        if (lastEntryAdded >= entries.length) {
+            // Fails silently.
+            return;
+        }
+        this.entries[lastEntryAdded] = entry;
+    }
+
+    public void addEntry(char unicodeStart, char unicodeEnd,
+            char glyphStartIndex) {
+        CMap12Entry newEntry = new CMap12Entry(unicodeStart, unicodeEnd,
+                glyphStartIndex);
+        addEntry(newEntry);
+    }
+
+    public int encodeCharacter(int codePoint) {
+        CMap12Entry entry = entryForChar((char) codePoint);
+        if (entry == null) {
+            return 0;
+        }
+        return entry.encodeCharacter(codePoint);
+    }
+
+    private CMap12Entry entryForChar(int codePoint) {
+        for (int i = 0; i < entries.length; i++) {
+            if (entries[i].containsChar(codePoint)) {
+                return entries[i];
+            }
+        }
+        return null;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public int decodeCharacter(int glyphIndexInput) {
+        for (int i = 0; i < entries.length; i++) {
+            int codePoint = entries[i].decodeCharacter(glyphIndexInput);
+            if (codePoint != Character.MAX_VALUE) {
+                return codePoint;
+            }
+        }
+        return Character.MAX_VALUE;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public String asPostScript(org.axsl.ps.Encoding baseEncoding) {
+        return null;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public int getFirstIndex() {
+        return INVALID_UNICODE_CHAR;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public int getLastIndex() {
+        return INVALID_UNICODE_CHAR;
+    }
+
+}

Added: trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap12Entry.java
===================================================================
--- trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap12Entry.java	                        (rev 0)
+++ trunk/foray/foray-ps/src/java/org/foray/ps/encode/CMap12Entry.java	2006-03-04 12:37:53 UTC (rev 6872)
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2006 The FOray Project.
+ *      http://www.foray.org
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * 
+ * This work is in part derived from the following work(s), used with the
+ * permission of the licensor:
+ *      Apache FOP, licensed by the Apache Software Foundation
+ *
+ */
+
+/* $Id: CMap04Entry.java 6871 2006-03-04 12:06:03Z victormote $ */
+ 
+package org.foray.ps.encode;
+
+/**
+ * Contains one entry from a TrueType CMap subtable, Format 12, which handles
+ * 32-bit Unicode codepoint ranges.
+ */
+public class CMap12Entry {
+    public int unicodeStart;
+    public int unicodeEnd;
+    public int glyphStartIndex;
+
+    public CMap12Entry(int unicodeStart, int unicodeEnd, int glyphStartIndex) {
+        this.unicodeStart = unicodeStart;
+        this.unicodeEnd = unicodeEnd;
+        this.glyphStartIndex = glyphStartIndex;
+    }
+
+    /**
+     * Compute the glyphEndIndex that is implied from the raw data.
+     * @return The last glyphIndex that is addressed by this entry, i.e. the
+     * glyph index that corresponds to unicodeEnd.
+     */
+    public int getGlyphEndIndex() {
+        return glyphStartIndex + unicodeEnd - unicodeStart;
+    }
+
+    public boolean containsChar(int codePoint) {
+        if (codePoint < this.unicodeStart) {
+            return false;
+        }
+        if (codePoint > this.unicodeEnd) {
+            return false;
+        }
+        return true;
+    }
+
+    public int encodeCharacter(int codePoint) {
+        if (! containsChar(codePoint)) {
+            return 0;
+        }
+        return codePoint - this.unicodeStart + this.glyphStartIndex;
+    }
+
+    public int decodeCharacter(int glyphIndex) {
+        int codePoint = glyphIndex - this.glyphStartIndex + this.unicodeStart;
+        if (glyphIndex >= this.glyphStartIndex
+                && codePoint <= this.unicodeStart) {
+            return codePoint;
+        }
+        return Character.MAX_VALUE;
+    }
+
+}


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