| /* |
| * 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.svg; |
| |
| import java.awt.Color; |
| import java.awt.Graphics2D; |
| import java.awt.Paint; |
| import java.awt.Shape; |
| import java.awt.Stroke; |
| import java.awt.geom.AffineTransform; |
| import java.awt.geom.GeneralPath; |
| import java.awt.geom.Point2D; |
| import java.io.IOException; |
| |
| import org.apache.batik.gvt.text.TextPaintInfo; |
| |
| import org.apache.fop.fonts.Font; |
| import org.apache.fop.fonts.FontInfo; |
| import org.apache.fop.svg.font.FOPGVTFont; |
| import org.apache.fop.svg.font.FOPGVTGlyphVector; |
| |
| /** |
| * Renders the attributed character iterator of a {@link org.apache.batik.bridge.TextNode}. |
| * This class draws the text directly into the PDFGraphics2D so that |
| * the text is not drawn using shapes which makes the PDF files larger. |
| * If the text is simple enough to draw then it sets the font and calls |
| * drawString. If the text is complex or the cannot be translated |
| * into a simple drawString the StrokingTextPainter is used instead. |
| * |
| * @version $Id$ |
| */ |
| class PDFTextPainter extends NativeTextPainter { |
| |
| private PDFGraphics2D pdf; |
| |
| private PDFTextUtil textUtil; |
| |
| private double prevVisibleGlyphWidth; |
| |
| private boolean repositionNextGlyph; |
| |
| /** |
| * Create a new PDF text painter with the given font information. |
| * |
| * @param fi the font info |
| */ |
| public PDFTextPainter(FontInfo fi) { |
| super(fi); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected boolean isSupported(Graphics2D g2d) { |
| return g2d instanceof PDFGraphics2D; |
| } |
| |
| @Override |
| protected void preparePainting(Graphics2D g2d) { |
| pdf = (PDFGraphics2D) g2d; |
| } |
| |
| @Override |
| protected void saveGraphicsState() { |
| pdf.saveGraphicsState(); |
| } |
| |
| @Override |
| protected void restoreGraphicsState() { |
| pdf.restoreGraphicsState(); |
| } |
| |
| @Override |
| protected void setInitialTransform(AffineTransform transform) { |
| createTextUtil(); |
| textUtil.concatMatrix(transform); |
| } |
| |
| private void createTextUtil() { |
| textUtil = new PDFTextUtil(pdf.fontInfo) { |
| protected void write(String code) { |
| pdf.currentStream.write(code); |
| } |
| protected void write(StringBuffer code) { |
| pdf.currentStream.append(code); |
| } |
| }; |
| } |
| |
| @Override |
| protected void clip(Shape clip) { |
| pdf.writeClip(clip); |
| } |
| |
| private static int[] paZero = new int[4]; |
| |
| protected void writeGlyphs(FOPGVTGlyphVector gv, GeneralPath debugShapes) throws IOException { |
| if (gv.getGlyphPositionAdjustments() == null) { |
| super.writeGlyphs(gv, debugShapes); |
| } else { |
| FOPGVTFont gvtFont = (FOPGVTFont) gv.getFont(); |
| String fk = gvtFont.getFontKey(); |
| Font f = gvtFont.getFont(); |
| Point2D initialPos = gv.getGlyphPosition(0); |
| if (f.isMultiByte()) { |
| int fs = f.getFontSize(); |
| float fsPoints = fs / 1000f; |
| double xc = 0f; |
| double yc = 0f; |
| double xoLast = 0f; |
| double yoLast = 0f; |
| textUtil.writeTextMatrix(new AffineTransform(1, 0, 0, -1, initialPos.getX(), initialPos.getY())); |
| textUtil.updateTf(fk, fsPoints, true, false); |
| int[][] dp = gv.getGlyphPositionAdjustments(); |
| for (int i = 0, n = gv.getNumGlyphs(); i < n; i++) { |
| int gc = gv.getGlyphCode(i); |
| int[] pa = ((i > dp.length) || (dp[i] == null)) ? paZero : dp[i]; |
| double xo = xc + pa[0]; |
| double yo = yc + pa[1]; |
| double xa = f.getWidth(gc); |
| double ya = 0; |
| double xd = (xo - xoLast) / 1000f; |
| double yd = (yo - yoLast) / 1000f; |
| textUtil.writeTd(xd, yd); |
| textUtil.writeTj((char) gc, true, false); |
| xc += xa + pa[2]; |
| yc += ya + pa[3]; |
| xoLast = xo; |
| yoLast = yo; |
| } |
| } |
| } |
| } |
| |
| @Override |
| protected void beginTextObject() { |
| applyColorAndPaint(tpi); |
| textUtil.beginTextObject(); |
| boolean stroke = (tpi.strokePaint != null) && (tpi.strokeStroke != null); |
| textUtil.setTextRenderingMode(tpi.fillPaint != null, stroke, false); |
| } |
| |
| @Override |
| protected void endTextObject() { |
| textUtil.writeTJ(); |
| textUtil.endTextObject(); |
| } |
| |
| private void applyColorAndPaint(TextPaintInfo tpi) { |
| Paint fillPaint = tpi.fillPaint; |
| Paint strokePaint = tpi.strokePaint; |
| Stroke stroke = tpi.strokeStroke; |
| int fillAlpha = PDFGraphics2D.OPAQUE; |
| if (fillPaint instanceof Color) { |
| Color col = (Color) fillPaint; |
| pdf.applyColor(col, true); |
| fillAlpha = col.getAlpha(); |
| } |
| if (strokePaint instanceof Color) { |
| Color col = (Color) strokePaint; |
| pdf.applyColor(col, false); |
| } |
| pdf.applyPaint(fillPaint, true); |
| pdf.applyStroke(stroke); |
| if (strokePaint != null) { |
| pdf.applyPaint(strokePaint, false); |
| } |
| pdf.applyAlpha(fillAlpha, PDFGraphics2D.OPAQUE); |
| } |
| |
| @Override |
| protected void positionGlyph(Point2D prevPos, Point2D glyphPos, boolean reposition) { |
| // TODO Glyph transforms could be refined so not every char has to be painted |
| // with its own TJ command (stretch/squeeze case could be optimized) |
| repositionNextGlyph = (prevPos == null |
| || prevPos.getY() != glyphPos.getY() |
| || reposition); |
| if (!repositionNextGlyph) { |
| double xdiff = glyphPos.getX() - prevPos.getX(); |
| //Width of previous character |
| double cw = prevVisibleGlyphWidth; |
| double effxdiff = (1000 * xdiff) - cw; |
| if (effxdiff != 0) { |
| double adjust = (-effxdiff / font.getFontSize()); |
| textUtil.adjustGlyphTJ(adjust * 1000); |
| } |
| } |
| } |
| |
| @Override |
| protected void writeGlyph(char glyph, AffineTransform transform) { |
| prevVisibleGlyphWidth = font.getWidth(glyph); |
| boolean encodingChanging = false; // used for single byte |
| if (!textUtil.isMultiByteFont(font.getFontName())) { |
| int encoding = glyph / 256; |
| glyph = (char) (glyph % 256); |
| if (textUtil.getCurrentEncoding() != encoding) { |
| textUtil.setCurrentEncoding(encoding); |
| encodingChanging = true; |
| } |
| } |
| if (repositionNextGlyph || encodingChanging) { |
| textUtil.writeTJ(); |
| if (font != textUtil.getCurrentFont() || encodingChanging) { |
| textUtil.setCurrentFont(font); |
| textUtil.writeTf(font); |
| } |
| textUtil.writeTextMatrix(transform); |
| } |
| textUtil.writeTJMappedChar(glyph); |
| } |
| |
| } |
