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/**
* Copyright 2010 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package com.jogamp.graph.font;
import jogamp.graph.geom.plane.AffineTransform;
import com.jogamp.graph.curve.OutlineShape;
import com.jogamp.graph.curve.opengl.TextRegionUtil.ShapeVisitor;
import com.jogamp.opengl.math.geom.AABBox;
/**
* Interface wrapper for font implementation.
* <p>
* TrueType Font Specification:
* <ul>
* <li>http://www.freetype.org/freetype2/documentation.html</li>
* <li>http://developer.apple.com/fonts/ttrefman/rm06/Chap6.html</li>
* <li>http://www.microsoft.com/typography/SpecificationsOverview.mspx</li>
* <li>http://www.microsoft.com/typography/otspec/</li>
* </ul>
* </p>
* <p>
* TrueType Font Table Introduction:
* <ul>
* <li>http://scripts.sil.org/cms/scripts/page.php?item_id=IWS-Chapter08</li>
* </ul>
* </p>
* <p>
* Misc.:
* <ul>
* <li>Treatis on Font <code>Rasterization https://freddie.witherden.org/pages/font-rasterisation/</code></li>
* <li>Glyph Hell <code>http://walon.org/pub/ttf/ttf_glyphs.htm</code></li>
* </ul>
* </p>
*/
public interface Font {
/** font name indices for name table */
public static final int NAME_COPYRIGHT = 0;
public static final int NAME_FAMILY = 1;
public static final int NAME_SUBFAMILY = 2;
public static final int NAME_UNIQUNAME = 3;
public static final int NAME_FULLNAME = 4;
public static final int NAME_VERSION = 5;
public static final int NAME_MANUFACTURER = 8;
public static final int NAME_DESIGNER = 9;
/**
* Metrics for font
*
* Depending on the font's direction, horizontal or vertical,
* the following tables shall be used:
*
* Vertical http://developer.apple.com/fonts/TTRefMan/RM06/Chap6vhea.html
* Horizontal http://developer.apple.com/fonts/TTRefMan/RM06/Chap6hhea.html
*/
public interface Metrics {
float getAscent(float pixelSize);
float getDescent(float pixelSize);
float getLineGap(float pixelSize);
float getMaxExtend(float pixelSize);
float getScale(float pixelSize);
/**
* @param pixelSize
* @param tmpV3 caller provided temporary 3-component vector
* @return
*/
AABBox getBBox(float pixelSize, float[] tmpV3);
}
/**
* Glyph for font
*
* http://developer.apple.com/textfonts/TTRefMan/RM06/Chap6cmap.html
* http://developer.apple.com/textfonts/TTRefMan/RM06/Chap6glyf.html
* http://www.microsoft.com/typography/otspec/glyf.htm
*/
public interface Glyph {
// reserved special glyph IDs
// http://scripts.sil.org/cms/scripts/page.php?item_id=IWS-Chapter08#ba57949e
public static final int ID_UNKNOWN = 0;
public static final int ID_CR = 2;
public static final int ID_SPACE = 3;
public Font getFont();
public char getSymbol();
public short getID();
public AABBox getBBox();
public float getScale(float pixelSize);
/**
* @param pixelSize
* @param tmpV3 caller provided temporary 3-component vector
* @return
*/
public AABBox getBBox(float pixelSize, float[] tmpV3);
public float getAdvance(float pixelSize, boolean useFrationalMetrics);
public OutlineShape getShape();
public int hashCode();
}
public String getName(int nameIndex);
public StringBuilder getName(StringBuilder string, int nameIndex);
/** Shall return the family and subfamily name, separated a dash.
* <p>{@link #getName(StringBuilder, int)} w/ {@link #NAME_FAMILY} and {@link #NAME_SUBFAMILY}</p>
* <p>Example: "{@code Ubuntu-Regular}"</p> */
public StringBuilder getFullFamilyName(StringBuilder buffer);
public StringBuilder getAllNames(StringBuilder string, String separator);
/**
* <pre>
Font Scale Formula:
inch: 25.4 mm
pointSize: [point] = [1/72 inch]
[1] Scale := pointSize * resolution / ( 72 points per inch * units_per_em )
[2] PixelSize := pointSize * resolution / ( 72 points per inch )
[3] Scale := PixelSize / units_per_em
* </pre>
* @param fontSize in point-per-inch
* @param resolution display resolution in dots-per-inch
* @return pixel-per-inch, pixelSize scale factor for font operations.
*/
public float getPixelSize(float fontSize /* points per inch */, float resolution);
public float getAdvanceWidth(int glyphID, float pixelSize);
public Metrics getMetrics();
public Glyph getGlyph(char symbol);
public int getNumGlyphs();
public float getLineHeight(float pixelSize);
public float getMetricWidth(CharSequence string, float pixelSize);
public float getMetricHeight(CharSequence string, float pixelSize);
/**
* Return the <i>layout</i> bounding box as computed by each glyph's metrics.
* The result is not pixel correct, bit reflects layout specific metrics.
* <p>
* See {@link #getPointsBounds(AffineTransform, CharSequence, float)} for pixel correct results.
* </p>
* @param string string text
* @param pixelSize Use {@link Font#getPixelSize(float, float)} for resolution correct pixel-size.
*/
public AABBox getMetricBounds(CharSequence string, float pixelSize);
/**
* Return the bounding box by taking each glyph's point-based bounding box into account.
* @param transform optional given transform
* @param string string text
* @param pixelSize Use {@link Font#getPixelSize(float, float)} for resolution correct pixel-size.
*/
public AABBox getPointsBounds(final AffineTransform transform, CharSequence string, float pixelSize);
public boolean isPrintableChar( char c );
/** Shall return {@link #getFullFamilyName()} */
@Override
public String toString();
}
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