com.sun.javafx.font.PrismFontLoader Maven / Gradle / Ivy
The newest version!
/*
* Copyright (c) 2011, 2022, 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.javafx.font;
import com.sun.javafx.scene.text.FontHelper;
import javafx.scene.text.*;
import com.sun.javafx.tk.*;
import java.lang.reflect.Method;
import java.net.URL;
import java.io.InputStream;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.List;
import java.util.Properties;
public class PrismFontLoader extends FontLoader {
private static PrismFontLoader theInstance = new PrismFontLoader();
public static PrismFontLoader getInstance() { return theInstance; }
/**
* Flag to keep track whether the fontCache map has been initialized with
* the embedded fonts.
*/
private boolean embeddedFontsLoaded = false;
Properties loadEmbeddedFontDefinitions() {
Properties map = new Properties();
// locate the META-INF directory and search for a fonts.mf
// located there
ClassLoader loader = Thread.currentThread().getContextClassLoader();
if (loader == null) return map;
URL u = loader.getResource("META-INF/fonts.mf");
if (u == null) return map;
// read in the contents of the file
try (InputStream in = u.openStream()) {
map.load(in);
} catch (Exception e) {
e.printStackTrace();
}
return map;
}
private void loadEmbeddedFonts() {
if (!embeddedFontsLoaded) {
FontFactory fontFactory = getFontFactoryFromPipeline();
if (!fontFactory.hasPermission()) {
embeddedFontsLoaded = true;
return;
}
Properties map = loadEmbeddedFontDefinitions();
Enumeration names = map.keys();
ClassLoader loader = Thread.currentThread().getContextClassLoader();
while (names.hasMoreElements()) {
String n = (String)names.nextElement();
String p = map.getProperty(n);
if (p.startsWith("/")) {
p = p.substring(1);
try (InputStream in = loader.getResourceAsStream(p)) {
fontFactory.loadEmbeddedFont(n, in, 0, true, false);
} catch (Exception e) {
}
}
}
embeddedFontsLoaded = true;
}
}
private Font[] createFonts(PGFont[] fonts) {
if (fonts == null || fonts.length == 0) {
return null;
}
Font[] fxFonts = new Font[fonts.length];
for (int i=0; i getFamilies() {
loadEmbeddedFonts();
return Arrays.asList(getFontFactoryFromPipeline().
getFontFamilyNames());
}
/**
* Gets the names of all fonts that are installed on the users system,
* including any embedded fonts and SDK fonts.
*
* @profile common
*/
@Override public List getFontNames() {
loadEmbeddedFonts();
return Arrays.asList(getFontFactoryFromPipeline().getFontFullNames());
}
/**
* Gets the names of all fonts in the specified font family that are
* installed on the users system, including any embedded fonts and
* SDK fonts.
*
* @profile common
*/
@Override public List getFontNames(String family) {
loadEmbeddedFonts();
return Arrays.asList(getFontFactoryFromPipeline().
getFontFullNames(family));
}
/**
* Searches for an appropriate font based on the font family name and
* weight and posture style. This method is not guaranteed to return
* a specific font, but does its best to find one that fits the
* specified requirements.
*
* For SDK/runtime fonts, we will attempt to match properties to a
* SDK/runtime fonts. If a specific SDK font is not found in the runtime
* JAR, the font loading will revert to FontFactory default font, rather
* then finding closest matching available SDK font. This is how SDK font
* loading was handled in the past.
*
* @param family The family of the font
* @param weight The weight of the font
* @param posture The posture or posture of the font
* @param size The point size of the font. This can be a fractional value
*
* @profile desktop
*/
@Override public Font font(String family, FontWeight weight,
FontPosture posture, float size) {
FontFactory fontFactory = getFontFactoryFromPipeline();
if (!embeddedFontsLoaded && !fontFactory.isPlatformFont(family)) {
loadEmbeddedFonts();
}
// REMIND. Some day need to have better granularity.
boolean bold = weight != null &&
weight.ordinal() >= FontWeight.BOLD.ordinal();
boolean italic = posture == FontPosture.ITALIC;
PGFont prismFont = fontFactory.createFont(family, bold, italic, size);
// Create Font and set implementation
Font fxFont = FontHelper.nativeFont(prismFont, prismFont.getName(),
prismFont.getFamilyName(),
prismFont.getStyleName(), size);
return fxFont;
}
/**
* @param font
*/
@Override public void loadFont(Font font) {
FontFactory fontFactory = getFontFactoryFromPipeline();
String fullName = font.getName();
if (!embeddedFontsLoaded && !fontFactory.isPlatformFont(fullName)) {
loadEmbeddedFonts();
}
// find the native Prism Font object based on this JavaFX font. At the
// conclusion of this method, be sure to set the name, family, and
// style on the Font object via the setNativeFont method.
// the Prism font we're trying to find
PGFont prismFont = fontFactory.createFont(fullName, (float)font.getSize());
// update the name variable to match what was actually loaded
String name = prismFont.getName();
String family = prismFont.getFamilyName();
String style = prismFont.getStyleName();
FontHelper.setNativeFont(font, prismFont, name, family, style);
}
@Override public FontMetrics getFontMetrics(Font font) {
if (font != null) {
PGFont prismFont = (PGFont) FontHelper.getNativeFont(font);
Metrics metrics = PrismFontUtils.getFontMetrics(prismFont);
// TODO: what's the difference between ascent and maxAscent?
float maxAscent = -metrics.getAscent();//metrics.getMaxAscent();
float ascent = -metrics.getAscent();
float xheight = metrics.getXHeight();
float descent = metrics.getDescent();
// TODO: what's the difference between descent and maxDescent?
float maxDescent = metrics.getDescent();//metrics.getMaxDescent();
float leading = metrics.getLineGap();
return FontMetrics.createFontMetrics(maxAscent, ascent, xheight, descent, maxDescent, leading, font);
} else {
return null; // this should never happen
}
}
@Override public float getCharWidth(char ch, Font font) {
PGFont prismFont = (PGFont) FontHelper.getNativeFont(font);
return (float)PrismFontUtils.getCharWidth(prismFont, ch);
}
@Override public float getSystemFontSize() {
// PrismFontFactory is what loads the DLL, so we may as
// well place the required native method there.
return PrismFontFactory.getSystemFontSize();
}
FontFactory installedFontFactory = null;
private FontFactory getFontFactoryFromPipeline() {
if (installedFontFactory != null) {
return installedFontFactory;
}
try {
Class plc = Class.forName("com.sun.prism.GraphicsPipeline");
Method gpm = plc.getMethod("getPipeline", (Class[])null);
Object plo = gpm.invoke(null);
Method gfm = plc.getMethod("getFontFactory", (Class[])null);
Object ffo = gfm.invoke(plo);
installedFontFactory = (FontFactory)ffo;
} catch (Exception e) {
}
return installedFontFactory;
}
}