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- /*
- * 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.
- */
-
- /* $Id$ */
-
- package org.apache.fop.render.java2d;
-
- import java.awt.Graphics2D;
- import java.awt.font.GlyphVector;
- import java.util.Arrays;
-
- import org.apache.fop.apps.FOUserAgent;
- import org.apache.fop.fonts.Font;
- import org.apache.fop.fonts.FontCollection;
- import org.apache.fop.fonts.FontEventAdapter;
- import org.apache.fop.fonts.FontInfo;
- import org.apache.fop.fonts.FontManager;
- import org.apache.fop.fonts.LazyFont;
- import org.apache.fop.fonts.MultiByteFont;
- import org.apache.fop.fonts.Typeface;
- import org.apache.fop.util.CharUtilities;
-
- /**
- * Rendering-related utilities for Java2D.
- */
- public final class Java2DUtil {
-
- private Java2DUtil() {
- }
-
- /**
- * Builds a default {@link FontInfo} object for use with output formats using the Java2D
- * font setup.
- * @param fontInfo the font info object to populate
- * @param userAgent the user agent
- * @return the populated font information object
- */
- public static FontInfo buildDefaultJava2DBasedFontInfo(
- FontInfo fontInfo, FOUserAgent userAgent) {
- Java2DFontMetrics java2DFontMetrics = new Java2DFontMetrics();
-
- FontManager fontManager = userAgent.getFontManager();
- FontCollection[] fontCollections = new FontCollection[] {
- new org.apache.fop.render.java2d.Base14FontCollection(java2DFontMetrics),
- new InstalledFontCollection(java2DFontMetrics)
- };
-
- FontInfo fi = (fontInfo != null ? fontInfo : new FontInfo());
- fi.setEventListener(new FontEventAdapter(userAgent.getEventBroadcaster()));
- fontManager.setup(fi, fontCollections);
- return fi;
- }
-
- /**
- * Creates an instance of {@link GlyphVector} that correctly handle surrogate pairs and advanced font features such
- * as GSUB/GPOS/GDEF.
- *
- * @param text Text to render
- * @param g2d the target Graphics2D instance
- * @param font the font instance
- * @param fontInfo the font information
- * @return an instance of {@link GlyphVector}
- */
- public static GlyphVector createGlyphVector(String text, Graphics2D g2d, Font font, FontInfo fontInfo) {
- MultiByteFont multiByteFont = getMultiByteFont(font.getFontName(), fontInfo);
-
- if (multiByteFont == null) {
- return createGlyphVector(text, g2d);
- }
-
- return createGlyphVectorMultiByteFont(text, g2d, multiByteFont);
- }
-
- /**
- * Creates a {@link GlyphVector} using characters. Filters out non-bmp characters.
- */
- private static GlyphVector createGlyphVector(String text, Graphics2D g2d) {
- StringBuilder sb = new StringBuilder(text.length());
- for (int cp : CharUtilities.codepointsIter(text)) {
- // If we are here we probably do not support non-BMP codepoints
- sb.appendCodePoint(cp <= 0xFFFF ? cp : Typeface.NOT_FOUND);
- }
- return g2d.getFont().createGlyphVector(g2d.getFontRenderContext(), sb.toString());
- }
-
- /**
- * Creates a {@link GlyphVector} using glyph indexes instead of characters. To correctly support the advanced font
- * features we have to build the GlyphVector passing the glyph indexes instead of the characters. This because some
- * of the chars in text might have been replaced by an internal font representation during
- * GlyphMapping.processWordMapping. Eg 'fi' replaced with the corresponding character in the font ligatures table
- * (GSUB).
- */
- private static GlyphVector createGlyphVectorMultiByteFont(String text, Graphics2D g2d,
- MultiByteFont multiByteFont) {
- int[] glyphCodes = new int[text.length()];
- int currentIdx = 0;
-
- for (int cp : CharUtilities.codepointsIter(text)) {
- // mapChar is not working here because MultiByteFont.mapChar replaces the glyph index with
- // CIDSet.mapChar when isEmbeddable == true.
- glyphCodes[currentIdx++] = multiByteFont.findGlyphIndex(cp);
- }
-
- // Trims glyphCodes
- if (currentIdx != text.length()) {
- glyphCodes = Arrays.copyOf(glyphCodes, currentIdx);
- }
-
- return g2d.getFont().createGlyphVector(g2d.getFontRenderContext(), glyphCodes);
- }
-
- /**
- * Returns an instance of {@link MultiByteFont} for the given font name. This method will try to unwrap containers
- * such as {@link CustomFontMetricsMapper} and {@link LazyFont}
- *
- * @param fontName font key
- * @param fontInfo font information
- * @return An instance of {@link MultiByteFont} or null if it
- */
- private static MultiByteFont getMultiByteFont(String fontName, FontInfo fontInfo) {
- Typeface tf = fontInfo.getFonts().get(fontName);
-
- if (tf instanceof CustomFontMetricsMapper) {
- tf = ((CustomFontMetricsMapper) tf).getRealFont();
- }
-
- if (tf instanceof LazyFont) {
- tf = ((LazyFont) tf).getRealFont();
- }
-
- return (tf instanceof MultiByteFont) ? (MultiByteFont) tf : null;
- }
-
- }
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