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Diffstat (limited to 'gnu/java/awt/font/autofit/Latin.java')
-rw-r--r-- | gnu/java/awt/font/autofit/Latin.java | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/gnu/java/awt/font/autofit/Latin.java b/gnu/java/awt/font/autofit/Latin.java new file mode 100644 index 000000000..0352b41a4 --- /dev/null +++ b/gnu/java/awt/font/autofit/Latin.java @@ -0,0 +1,177 @@ +/* Latin.java -- Latin specific glyph handling + Copyright (C) 2006 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.awt.font.autofit; + +import java.awt.geom.AffineTransform; + +import gnu.java.awt.font.opentype.OpenTypeFont; +import gnu.java.awt.font.opentype.truetype.Zone; + +/** + * Implements Latin specific glyph handling. + */ +class Latin + implements Script, Constants +{ + + private static final int MAX_WIDTHS = 16; + + public void applyHints(GlyphHints hints, ScriptMetrics metrics) + { + // TODO Auto-generated method stub + + } + + public void doneMetrics(ScriptMetrics metrics) + { + // TODO Auto-generated method stub + + } + + /** + * Initializes the <code>hints</code> object. + * + * @param hints the hints to initialize + * @param metrics the metrics to use + */ + public void initHints(GlyphHints hints, ScriptMetrics metrics) + { + hints.rescale(metrics); + LatinMetrics lm = (LatinMetrics) metrics; + hints.xScale = lm.axis[DIMENSION_HORZ].scale; + hints.xDelta = lm.axis[DIMENSION_HORZ].delta; + hints.yScale = lm.axis[DIMENSION_VERT].scale; + hints.yDelta = lm.axis[DIMENSION_VERT].delta; + // TODO: Set the scaler and other flags. + } + + /** + * Initializes the script metrics. + * + * @param metrics the script metrics to initialize + * @param face the font + */ + public void initMetrics(ScriptMetrics metrics, OpenTypeFont face) + { + assert metrics instanceof LatinMetrics; + LatinMetrics lm = (LatinMetrics) metrics; + lm.unitsPerEm = face.unitsPerEm; + + // TODO: Check for latin charmap. + + initWidths(lm, face, 'o'); + initBlues(lm, face); + } + + public void scaleMetrics(ScriptMetrics metrics) + { + // TODO Auto-generated method stub + + } + + /** + * Determines the standard stem widths. + * + * @param metrics the metrics to use + * @param face the font face + * @param ch the character that is used for getting the widths + */ + private void initWidths(LatinMetrics metrics, OpenTypeFont face, char ch) + { + GlyphHints hints = new GlyphHints(); + metrics.axis[DIMENSION_HORZ].widthCount = 0; + metrics.axis[DIMENSION_VERT].widthCount = 0; + int glyphIndex = face.getGlyph(ch); + // TODO: Avoid that AffineTransform constructor and change + // getRawGlyphOutline() to accept null or remove that parameter altogether. + // Consider this when the thing is done and we know what we need that for. + Zone outline = face.getRawGlyphOutline(glyphIndex, new AffineTransform()); + LatinMetrics dummy = new LatinMetrics(); + Scaler scaler = dummy.scaler; + dummy.unitsPerEm = metrics.unitsPerEm; + scaler.xScale = scaler.yScale = 10000; + scaler.xDelta = scaler.yDelta = 0; + scaler.face = face; + hints.rescale(dummy); + hints.reload(outline); + for (int dim = 0; dim < DIMENSION_MAX; dim++) + { + LatinAxis axis = metrics.axis[dim]; + AxisHints axHints = hints.axis[dim]; + int numWidths = 0; + hints.computeSegments(dim); + hints.linkSegments(dim); + Segment[] segs = axHints.segments; + for (int i = 0; i < segs.length; i++) + { + Segment seg = segs[i]; + Segment link = seg.link; + if (link != null && link.link == seg && link.index > i) + { + int dist = Math.abs(seg.pos - link.pos); + if (numWidths < MAX_WIDTHS) + axis.widths[numWidths++].org = dist; + } + } + } + for (int dim = 0; dim < DIMENSION_MAX; dim++) + { + LatinAxis axis = metrics.axis[dim]; + int stdw = axis.widthCount > 0 ? axis.widths[0].org + : constant(metrics, 50); + axis.edgeDistanceTreshold= stdw / 5; + } + } + + /** + * Initializes the blue zones of the font. + * + * @param metrics the metrics to use + * @param face the font face to analyze + */ + private void initBlues(LatinMetrics metrics, OpenTypeFont face) + { + // TODO: Implement. + } + + private int constant(LatinMetrics metrics, int c) + { + return c * (metrics.unitsPerEm / 2048); + } +} |