262 lines
9.1 KiB
Java
262 lines
9.1 KiB
Java
/*
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* Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 6271221 8145584
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* @summary ask a text layout for its pixel bounds, then render it and
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* compute the actual pixel bounds when rendering-- the actual pixel bounds
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* must be contained within the bounds reported by the text layout, or there
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* will be an exception.
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*/
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/*
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* Copyright 2005 IBM Corp. All Rights Reserved.
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*/
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import java.awt.*;
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import java.awt.font.*;
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import java.awt.geom.*;
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import java.awt.image.*;
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import java.text.*;
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import java.util.*;
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import static java.awt.Font.*;
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import static java.awt.font.GraphicAttribute.*;
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import static java.awt.font.ShapeGraphicAttribute.*;
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import static java.awt.font.TextAttribute.*;
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public class TestGetPixelBounds {
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static final boolean DEBUG;
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static final boolean DUMP;
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static {
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String dbg = null;
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String dmp = null;
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try {
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dbg = System.getProperty("DEBUG");
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dmp = System.getProperty("DUMP");
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}
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catch (SecurityException e) {
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dbg = dmp = null;
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}
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DEBUG = dbg != null;
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DUMP = dmp != null;
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}
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public static void main(String[] args) {
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float x = 0;
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float y = 0;
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boolean rotate = false;
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boolean underline = false;
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boolean graphic = false;
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String text = "Ping";
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for (int i = 0; i < args.length; ++i) {
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String arg = args[i];
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if (arg.startsWith("-x")) {
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x = Float.parseFloat(args[++i]);
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} else if (arg.startsWith("-y")) {
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y = Float.parseFloat(args[++i]);
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} else if (arg.startsWith("-r")) {
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rotate = true;
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} else if (arg.startsWith("-u")) {
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underline = true;
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} else if (arg.startsWith("-g")) {
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graphic = true;
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} else if (arg.startsWith("-t")) {
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text = args[++i];
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}
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}
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FontRenderContext frc = new FontRenderContext(null, true, true);
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Map<TextAttribute, Object> m = new HashMap<TextAttribute, Object>();
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m.put(FAMILY, SANS_SERIF);
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m.put(SIZE, 16);
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if (underline) {
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m.put(UNDERLINE, UNDERLINE_ON);
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}
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if (rotate) {
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m.put(TRANSFORM, AffineTransform.getRotateInstance(Math.PI/4));
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}
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Font font = Font.getFont(m);
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AttributedString as;
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if (graphic) {
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GraphicAttribute sga = new ShapeGraphicAttribute(
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new Ellipse2D.Float(0,-10,10,20), TOP_ALIGNMENT, STROKE);
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as = new AttributedString(text + '*' + text, m);
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as.addAttribute(CHAR_REPLACEMENT, sga, text.length(), text.length() + 1);
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} else {
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as = new AttributedString(text, m);
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}
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TextLayout tl = new TextLayout(as.getIterator(), frc);
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System.out.println("tl bounds: " + tl.getBounds());
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System.out.println("tl compute: " + computeLayoutBounds(tl, x, y, frc));
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System.out.println("tl pixel bounds: " + tl.getPixelBounds(frc, x, y));
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System.out.println(" again int off: " + tl.getPixelBounds(frc, x+2, y - 2));
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System.out.println(" again frac off: " + tl.getPixelBounds(frc, x+.5f, y + .2f));
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System.out.println(" again frc: " + tl.getPixelBounds(
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new FontRenderContext(AffineTransform.getScaleInstance(100, 100), true, true), x, y));
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System.out.println(" again int off: " + tl.getPixelBounds(frc, x-2, y+2));
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GlyphVector gv = font.createGlyphVector(frc, text);
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System.out.println("gv bounds: " + gv.getPixelBounds(frc, x, y));
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System.out.println("gv compute: " + computeLayoutBounds(gv, x, y, frc));
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if (!tl.getPixelBounds(frc, x, y).contains(computeLayoutBounds(tl, x, y, frc))) {
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throw new RuntimeException("error, tl.bounds does not contain computed bounds");
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}
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}
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static Rectangle computeLayoutBounds(TextLayout tl, float x, float y, FontRenderContext frc) {
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Rectangle bounds = tl.getBounds().getBounds();
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BufferedImage im = new BufferedImage(bounds.width + 4, bounds.height + 4,
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BufferedImage.TYPE_INT_ARGB);
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Graphics2D g2d = im.createGraphics();
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g2d.setColor(Color.WHITE);
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g2d.fillRect(0, 0, im.getWidth(), im.getHeight());
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float fx = (float)Math.IEEEremainder(x,1);
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float fy = (float)Math.IEEEremainder(y,1);
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g2d.setColor(Color.BLACK);
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tl.draw(g2d, fx + 2 - bounds.x, fy + 2 - bounds.y);
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Rectangle r = computePixelBounds(im);
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r.x += (int)Math.floor(x) - 2 + bounds.x;
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r.y += (int)Math.floor(y) - 2 + bounds.y;
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return r;
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}
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static Rectangle computeLayoutBounds(GlyphVector gv, float x, float y, FontRenderContext frc) {
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Rectangle bounds = gv.getVisualBounds().getBounds();
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BufferedImage im = new BufferedImage(bounds.width + 4, bounds.height + 4,
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BufferedImage.TYPE_INT_ARGB);
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Graphics2D g2d = im.createGraphics();
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g2d.setColor(Color.WHITE);
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g2d.fillRect(0, 0, im.getWidth(), im.getHeight());
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float fx = (float)Math.IEEEremainder(x,1);
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float fy = (float)Math.IEEEremainder(y,1);
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g2d.setColor(Color.BLACK);
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g2d.drawGlyphVector(gv, fx + 2 - bounds.x, fy + 2 - bounds.y);
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Rectangle r = computePixelBounds(im);
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r.x += (int)Math.floor(x) - 2 + bounds.x;
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r.y += (int)Math.floor(y) - 2 + bounds.y;
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return r;
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}
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static Rectangle computePixelBounds(BufferedImage im) {
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int w = im.getWidth();
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int h = im.getHeight();
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Formatter fmt = DEBUG ? new Formatter(System.err) : null;
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// dump
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if (DUMP && DEBUG) {
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fmt.format(" ");
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for (int j = 0; j < w; ++j) {
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fmt.format("%2d", j);
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}
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for (int i = 0; i < h; ++i) {
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fmt.format("\n[%2d] ", i);
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for (int j = 0; j < w; ++j) {
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fmt.format("%c ", im.getRGB(j, i) == -1 ? ' ' : '*');
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}
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}
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fmt.format("\n");
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}
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int l = -1, t = -1, r = w, b = h;
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{
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// get top
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int[] buf = new int[w];
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loop:
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while (++t < h) {
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im.getRGB(0, t, buf.length, 1, buf, 0, w); // w ignored
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for (int i = 0; i < buf.length; i++) {
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if (buf[i] != -1) {
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if (DEBUG) fmt.format("top pixel at %d,%d = 0x%08x\n", i, t, buf[i]);
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break loop;
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}
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}
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}
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if (DEBUG) fmt.format("t: %d\n", t);
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}
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// get bottom
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{
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int[] buf = new int[w];
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loop:
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while (--b > t) {
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im.getRGB(0, b, buf.length, 1, buf, 0, w); // w ignored
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for (int i = 0; i < buf.length; ++i) {
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if (buf[i] != -1) {
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if (DEBUG) fmt.format("bottom pixel at %d,%d = 0x%08x\n", i, b, buf[i]);
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break loop;
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}
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}
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}
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++b;
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if (DEBUG) fmt.format("b: %d\n", b);
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}
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// get left
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{
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loop:
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while (++l < r) {
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for (int i = t; i < b; ++i) {
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int v = im.getRGB(l, i);
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if (v != -1) {
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if (DEBUG) fmt.format("left pixel at %d,%d = 0x%08x\n", l, i, v);
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break loop;
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}
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}
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}
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if (DEBUG) fmt.format("l: %d\n", l);
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}
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// get right
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{
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loop:
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while (--r > l) {
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for (int i = t; i < b; ++i) {
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int v = im.getRGB(r, i);
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if (v != -1) {
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if (DEBUG) fmt.format("right pixel at %d,%d = 0x%08x\n", r, i, v);
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break loop;
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}
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}
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}
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++r;
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if (DEBUG) fmt.format("r: %d\n", r);
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}
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return new Rectangle(l, t, r-l, b-t);
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}
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}
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