/* * Copyright (c) 2005, 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. * * 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.
*/
// render the tests without antialiasing
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_OFF);
renderTests(g2d, "This is non-AA text");
// now do the above tests again, this time with antialiasing
g2d.translate(0, 100);
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
renderTests(g2d, "This is AA text");
}
// fill a rectangle once and make sure it is blue
g2d.fillRect(5, 5, 20, 20);
// fill another rectangle twice and make sure it is reversible // (should produce the background color)
g2d.fillRect(35, 5, 20, 20);
g2d.fillRect(35, 5, 20, 20);
// draw a string once and make sure it is blue
g2d.drawString(text, 5, 50);
// draw another string twice and make sure it is reversible // (should produce the background color)
g2d.drawString(text, 5, 70);
g2d.drawString(text, 5, 70);
/* * Not great having to allow any tolerance but some of * the scaling down for screen captures seems to introduce * tiny rounding errors that aren't consistent. * Allow a very small tolerance for this
*/ privatestaticboolean pixelsMatch(int p1, int p2) { // note : ignoring alpha int tol = 1; int r1 = p1 & 0x00ff0000 >> 16; int g1 = p1 & 0x0000ff00 >> 8; int b1 = p1 & 0x000000ff; int r2 = p2 & 0x00ff0000 >> 16; int g2 = p2 & 0x0000ff00 >> 8; int b2 = p2 & 0x000000ff; int rd = r2 - r1; if (rd < 0) rd = -rd; int gd = g2 - g1; if (gd < 0) gd = -gd; int bd = b2 - b1; if (bd < 0) bd = -bd; return (rd <= tol && gd <= tol && bd <= tol);
}
privatestaticvoid testPixel(BufferedImage capture, int x, int y, int expectedPixel,
String testDesc, boolean expectedRes)
{ int pixel = capture.getRGB(x, y); if (expectedRes) { if (!pixelsMatch(pixel, expectedPixel)) { try {
ImageIO.write(capture, "png", new File("capture.png"));
} catch (IOException e) {
System.err.println("can't write image " + e);
} thrownew RuntimeException( "Failed: Incorrect color for " + testDesc
+ " at (" + x + ", " + y + ") "
+ "(expected: " + Integer
.toHexString(expectedPixel) + " actual: "
+ Integer.toHexString(pixel) + ")");
}
} else { if (pixelsMatch(pixel, expectedPixel)) { try {
ImageIO.write(capture, "png", new File("capture.png"));
} catch (IOException e) {
System.err.println("can't write image " + e);
} thrownew RuntimeException( "Failed: Incorrect color for " + testDesc + " at (" + x + ", " + y + ") " + " : 0x" + Integer.toHexString(pixel));
}
}
}
final Frame frame = new Frame("XORPaint Test"); final XORPaint xorPanel = new XORPaint();
EventQueue.invokeAndWait(() -> {
frame.add(xorPanel);
frame.setUndecorated(true);
frame.pack();
frame.setSize(250, 250);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
});
Toolkit.getDefaultToolkit().sync();
Robot robot = new Robot();
robot.waitForIdle();
robot.delay(2000);
Point pt1 = xorPanel.getLocationOnScreen();
Rectangle rect = new Rectangle(pt1.x, pt1.y, 200, 200);
BufferedImage capture = robot.createScreenCapture(rect);
EventQueue.invokeAndWait(() -> frame.dispose());
// Make sure we have a white background, for starters
testPixel(capture, 180, 180, WHITE, "background", true);
// Test the non-AA primitives
testPixels(capture, 0, " (non-AA)");
// Test the AA primitives
testPixels(capture, 100, " (AA)");
}
}
Messung V0.5 in Prozent
¤ Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.0.10Bemerkung:
(vorverarbeitet am 2026-04-26)
¤
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.