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The Apache PDFBox library is an open source Java tool for working with PDF documents.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.pdfbox.pdmodel.font;
import java.io.IOException;
import org.apache.fontbox.util.BoundingBox;
import org.apache.pdfbox.util.Matrix;
import org.apache.pdfbox.util.Vector;
/**
* A font-like object.
*
* @author John Hewson
*/
public interface PDFontLike
{
/**
* Returns the name of this font, either the PostScript "BaseName" or the Type 3 "Name".
*/
String getName();
/**
* Returns the font descriptor, may be null.
*/
PDFontDescriptor getFontDescriptor();
/**
* Returns the font matrix, which represents the transformation from glyph space to text space.
*/
Matrix getFontMatrix();
/**
* Returns the font's bounding box.
*/
BoundingBox getBoundingBox() throws IOException;
/**
* Returns the position vector (v), in text space, for the given character.
* This represents the position of vertical origin relative to horizontal origin, for
* horizontal writing it will always be (0, 0). For vertical writing both x and y are set.
*
* @param code character code
* @return position vector
*/
Vector getPositionVector(int code);
/**
* Returns the height of the given character, in glyph space. This can be expensive to
* calculate. Results are only approximate.
*
* Warning: This method is deprecated in PDFBox 2.0 because there is no meaningful value
* which it can return. The {@link #getWidth} method returns the advance width of a glyph,
* but there is no corresponding advance height. The logical height of a character is the same
* for every character in a font, so if you want that, retrieve the font bbox's height.
* Otherwise if you want the visual bounds of the glyph then call getPath(..) on the appropriate
* PDFont subclass to retrieve the glyph outline as a GeneralPath.
*
* @param code character code
* @deprecated Use {@link #getBoundingBox().#getHeight(int)} instead.
*/
@Deprecated
float getHeight(int code) throws IOException;
/**
* Returns the advance width of the given character, in glyph space.
*
* If you want the visual bounds of the glyph then call getPath(..) on the appropriate
* PDFont subclass to retrieve the glyph outline as a GeneralPath instead.
*
* @param code character code
*/
float getWidth(int code) throws IOException;
/**
* Returns the width of a glyph in the embedded font file.
*
* @param code character code
* @return width in glyph space
* @throws IOException if the font could not be read
*/
float getWidthFromFont(int code) throws IOException;
/**
* Returns true if the font file is embedded in the PDF.
*/
boolean isEmbedded();
/**
* Returns true if the embedded font file is damaged.
*/
boolean isDamaged();
/**
* This will get the average font width for all characters.
*
* @return The width is in 1000 unit of text space, ie 333 or 777
*/
// todo: this method is highly suspicious, the average glyph width is not usually a good metric
float getAverageFontWidth();
}