506 lines
20 KiB
Java
506 lines
20 KiB
Java
/*
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* Copyright (c) 2002, 2016, 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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* @key headful
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* @bug 4780022 4862193 7179526
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* @summary Tests that clipped lines are drawn over the same pixels
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* as unclipped lines (within the clip bounds)
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* @run main/timeout=600/othervm -Dsun.java2d.ddforcevram=true LineClipTest
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* @run main/timeout=600/othervm LineClipTest
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*/
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/**
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* This app tests whether we are drawing clipped lines the same
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* as unclipped lines. The problem occurred when we started
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* clipping d3d lines using simple integer clipping, which did not
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* account for sub-pixel precision and ended up drawing very different
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* pixels than the same line drawn unclipped. A supposed fix
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* to that problem used floating-point clipping instead, but there
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* was some problem with very limited precision inside of d3d
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* (presumably in hardware) that caused some variation in pixels.
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* We decided that whatever the fix was, we needed a serious
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* line check test to make sure that all kinds of different
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* lines would be drawn exactly the same inside the clip area,
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* regardless of whether clipping was enabled. This test should
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* check all kinds of different cases, such as lines that fall
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* completely outside, completely inside, start outside and
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* end inside, etc., and lines should end and originate in
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* all quadrants of the space divided up by the clip box.
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*
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* The test works as follows:
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* We create nine quadrants using the spaces bisected by the
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* edges of the clip bounds (note that only one of these
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* quadrants is actually visible when clipping is enabled).
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* We create several points in each of these quadrants
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* (three in each of the invisible quadrants, nine in the
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* center/visible quadrant). Our resulting grid looks like
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* this:
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*
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* x x|x x x|x x
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* | |
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* | |
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* | |
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* | |
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* | |
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* x | | x
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* -----------------------------------
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* x |x x x| x
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* | |
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* | |
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* x |x x x| x
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* | |
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* | |
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* x |x x x| x
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* -----------------------------------
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* x | | x
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* | |
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* | |
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* | |
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* | |
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* | |
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* x x|x x x|x x
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*
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* The test then draws lines from every point to every other
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* point. First, we draw unclipped lines in blue and
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* then we draw clipped lines in red.
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* At certain times (after every point during the default
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* test, after every quadrant of lines if you run with the -quick
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* option), we check for errors and draw the current image
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* to the screen. Error checking consists of copying the
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* VolatileImage to a BufferedImage (because we need access
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* to the pixels directly) and checking every pixel in the
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* image. The check is simple: everything outside the
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* clip bounds should be blue (or the background color) and
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* everything inside the clip bounds should be red (or the
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* background color). So any blue pixel inside or red
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* pixel outside means that there was a drawing error and
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* the test fails.
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* There are 4 modes that the test can run in (dynamic mode is
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* exclusive to the other modes, but the other modes are combinable):
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*
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* (default): the clip is set
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* to a default size (100x100) and the test is run.
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*
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* -quick: The error
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* check is run only after every quadrant of lines is
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* drawn. This speeds up the test considerably with
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* some less accuracy in error checking (because pixels
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* from some lines may overdrawn pixels from other lines
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* before we have verified the correctness of those
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* pixels).
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*
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* -dynamic: There is no error checking, but this version
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* of the test automatically resizes the clip bounds and
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* reruns the test over and over. Nothing besides the
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* visual check verifies that the test is running correctly.
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*
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* -rect: Instead of drawing lines, the test draws rectangles
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* to/from all points in all quadrants. This tests similar
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* clipping functionality for drawRect().
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*
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* n (where "n" is a number): sets the clip size to the
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* given value. Just like the default test except that
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* the clip size is as specified.
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*
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* Note: this test must be run with the -Dsun.java2d.ddforcevram=true
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* option to force the test image to stay in VRAM. We currently
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* punt VRAM images to system memory when we detect lots of
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* reads. Since we read the whole buffer on every error check
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* to copy it to the BufferedImage), this causes us to punt the
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* buffer. A system memory surface will have no d3d capabilities,
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* thus we are not testing the d3d line quality when this happens.
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* By using the ddforcevram flag, we make sure the buffer
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* stays put in VRAM and d3d is used to draw the lines.
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*/
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import javax.swing.*;
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import java.awt.*;
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import java.awt.image.*;
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public class LineClipTest extends Component implements Runnable {
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int clipBumpVal = 5;
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static int clipSize = 100;
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int clipX1;
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int clipY1;
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static final int NUM_QUADS = 9;
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Point quadrants[][] = new Point[NUM_QUADS][];
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static boolean dynamic = false;
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BufferedImage imageChecker = null;
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Color unclippedColor = Color.blue;
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Color clippedColor = Color.red;
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int testW = -1, testH = -1;
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VolatileImage testImage = null;
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static boolean keepRunning = false;
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static boolean quickTest = false;
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static boolean rectTest = false;
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static boolean runTestDone = false;
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static Frame f = null;
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/**
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* Check for errors in the grid. This error check consists of
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* copying the buffer into a BufferedImage and reading all pixels
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* in that image. No pixel outside the clip bounds should be
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* of the color clippedColor and no pixel inside should be
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* of the color unclippedColor. Any wrong color returns an error.
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*/
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boolean gridError(Graphics g) {
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boolean error = false;
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if (imageChecker == null || (imageChecker.getWidth() != testW) ||
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(imageChecker.getHeight() != testH))
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{
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// Recreate BufferedImage as necessary
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GraphicsConfiguration gc = getGraphicsConfiguration();
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ColorModel cm = gc.getColorModel();
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WritableRaster wr =
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cm.createCompatibleWritableRaster(getWidth(), getHeight());
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imageChecker =
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new BufferedImage(cm, wr,
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cm.isAlphaPremultiplied(), null);
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}
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// Copy buffer to BufferedImage
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Graphics gChecker = imageChecker.getGraphics();
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gChecker.drawImage(testImage, 0, 0, this);
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// Set up pixel colors to check against
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int clippedPixelColor = clippedColor.getRGB();
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int unclippedPixelColor = unclippedColor.getRGB();
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int wrongPixelColor = clippedPixelColor;
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boolean insideClip = false;
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for (int row = 0; row < getHeight(); ++row) {
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for (int col = 0; col < getWidth(); ++col) {
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if (row >= clipY1 && row < (clipY1 + clipSize) &&
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col >= clipX1 && col < (clipX1 + clipSize))
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{
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// Inside clip bounds - should not see unclipped color
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wrongPixelColor = unclippedPixelColor;
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} else {
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// Outside clip - should not see clipped color
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wrongPixelColor = clippedPixelColor;
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}
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int pixel = imageChecker.getRGB(col, row);
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if (pixel == wrongPixelColor) {
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System.out.println("FAILED: pixel = " +
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Integer.toHexString(pixel) +
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" at (x, y) = " + col + ", " + row);
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// Draw magenta rectangle around problem pixel in buffer
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// for visual feedback to user
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g.setColor(Color.magenta);
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g.drawRect(col - 1, row - 1, 2, 2);
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error = true;
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}
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}
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}
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return error;
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}
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/**
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* Draw all test lines and check for errors (unless running
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* with -dynamic option)
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*/
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void drawLineGrid(Graphics screenGraphics, Graphics g) {
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// Fill buffer with background color
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g.setColor(Color.white);
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g.fillRect(0, 0, getWidth(), getHeight());
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// Now, iterate through all quadrants
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for (int srcQuad = 0; srcQuad < NUM_QUADS; ++srcQuad) {
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// Draw lines to all other quadrants
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for (int dstQuad = 0; dstQuad < NUM_QUADS; ++dstQuad) {
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for (int srcPoint = 0;
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srcPoint < quadrants[srcQuad].length;
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++srcPoint)
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{
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// For every point in the source quadrant
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int sx = quadrants[srcQuad][srcPoint].x;
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int sy = quadrants[srcQuad][srcPoint].y;
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for (int dstPoint = 0;
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dstPoint < quadrants[dstQuad].length;
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++dstPoint)
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{
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int dx = quadrants[dstQuad][dstPoint].x;
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int dy = quadrants[dstQuad][dstPoint].y;
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if (!rectTest) {
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// Draw unclipped/clipped lines to every
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// point in the dst quadrant
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g.setColor(unclippedColor);
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g.drawLine(sx, sy, dx, dy);
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g.setClip(clipX1, clipY1, clipSize, clipSize);
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g.setColor(clippedColor);
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g.drawLine(sx,sy, dx, dy);
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} else {
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// Draw unclipped/clipped rectangles to every
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// point in the dst quadrant
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g.setColor(unclippedColor);
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int w = dx - sx;
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int h = dy - sy;
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g.drawRect(sx, sy, w, h);
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g.setClip(clipX1, clipY1, clipSize, clipSize);
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g.setColor(clippedColor);
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g.drawRect(sx, sy, w, h);
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}
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g.setClip(null);
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}
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if (!dynamic) {
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// Draw screen update for visual feedback
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screenGraphics.drawImage(testImage, 0, 0, this);
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// On default test, check for errors after every
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// src point
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if (!quickTest && gridError(g)) {
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throw new java.lang.RuntimeException("Failed");
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}
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}
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}
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}
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if (!dynamic && quickTest && gridError(g)) {
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// On quick test, check for errors only after every
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// src quadrant
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throw new java.lang.RuntimeException("Failed");
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//return;
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}
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}
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if (!dynamic) {
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System.out.println("PASSED");
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if (!keepRunning) {
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f.dispose();
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}
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}
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}
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/**
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* If we have not yet run the test, or if the window size has
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* changed, or if we are running the test in -dynamic mode,
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* run the test. Then draw the test buffer to the screen
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*/
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public void paint(Graphics g) {
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if (dynamic || testImage == null ||
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getWidth() != testW || getHeight() != testH)
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{
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runTest(g);
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}
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if (testImage != null) {
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g.drawImage(testImage, 0, 0, this);
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}
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}
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/*
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* Create the quadrant of points and run the test to draw all the lines
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*/
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public void runTest(Graphics screenGraphics) {
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if (getWidth() == 0 || getHeight() == 0) {
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// May get here before window is really ready
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return;
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}
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clipX1 = (getWidth() - clipSize) / 2;
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clipY1 = (getHeight() - clipSize) / 2;
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int clipX2 = clipX1 + clipSize;
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int clipY2 = clipY1 + clipSize;
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int centerX = getWidth()/2;
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int centerY = getHeight()/2;
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int leftX = 0;
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int topY = 0;
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int rightX = getWidth() - 1;
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int bottomY = getHeight() - 1;
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int quadIndex = 0;
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// Offsets are used to force diagonal (versus hor/vert) lines
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int xOffset = 0;
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int yOffset = 0;
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if (quadrants[0] == null) {
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for (int i = 0; i < 9; ++i) {
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int numPoints = (i == 4) ? 9 : 3;
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quadrants[i] = new Point[numPoints];
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}
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}
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// Upper-left
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quadrants[quadIndex] = new Point[] {
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new Point(leftX + xOffset, clipY1 - 1 - yOffset),
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new Point(leftX + xOffset, topY + yOffset),
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new Point(clipX1 - 1 - xOffset, topY + yOffset),
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};
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quadIndex++;
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yOffset++;
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// Upper-middle
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quadrants[quadIndex] = new Point[] {
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new Point(clipX1 + 1 + xOffset, topY + yOffset),
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new Point(centerX + xOffset, topY + yOffset),
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new Point(clipX2 - 1 - xOffset, topY + yOffset),
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};
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quadIndex++;
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++yOffset;
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// Upper-right
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quadrants[quadIndex] = new Point[] {
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new Point(clipX2 + 1 + xOffset, topY + yOffset),
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new Point(rightX - xOffset, topY + yOffset),
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new Point(rightX - xOffset, clipY1 - 1 - yOffset),
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};
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quadIndex++;
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yOffset = 0;
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++xOffset;
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// Middle-left
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quadrants[quadIndex] = new Point[] {
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new Point(leftX + xOffset, clipY1 + 1 + yOffset),
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new Point(leftX + xOffset, centerY + yOffset),
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new Point(leftX + xOffset, clipY2 - 1 - yOffset),
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};
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quadIndex++;
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++yOffset;
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// Middle-middle
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quadrants[quadIndex] = new Point[] {
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new Point(clipX1 + 1 + xOffset, clipY1 + 1 + yOffset),
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new Point(centerX + xOffset, clipY1 + 1 + yOffset),
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new Point(clipX2 - 1 - xOffset, clipY1 + 1 + yOffset),
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new Point(clipX1 + 1 + xOffset, centerY + yOffset),
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new Point(centerX + xOffset, centerY + yOffset),
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new Point(clipX2 - 1 - xOffset, centerY + yOffset),
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new Point(clipX1 + 1 + xOffset, clipY2 - 1 - yOffset),
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new Point(centerX + xOffset, clipY2 - 1 - yOffset),
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new Point(clipX2 - 1 - xOffset, clipY2 - 1 - yOffset),
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};
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quadIndex++;
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++yOffset;
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// Middle-right
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quadrants[quadIndex] = new Point[] {
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new Point(rightX - xOffset, clipY1 + 1 + yOffset),
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new Point(rightX - xOffset, centerY + yOffset),
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new Point(rightX - xOffset, clipY2 - 1 - yOffset),
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};
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quadIndex++;
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yOffset = 0;
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++xOffset;
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// Lower-left
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quadrants[quadIndex] = new Point[] {
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new Point(leftX + xOffset, clipY2 + 1 + yOffset),
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new Point(leftX + xOffset, bottomY - yOffset),
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new Point(clipX1 - 1 - xOffset, bottomY - yOffset),
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};
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quadIndex++;
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++yOffset;
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// Lower-middle
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quadrants[quadIndex] = new Point[] {
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new Point(clipX1 + 1 + xOffset, bottomY - yOffset),
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new Point(centerX + xOffset, bottomY - yOffset),
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new Point(clipX2 - 1 - xOffset, bottomY - yOffset),
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};
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quadIndex++;
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++yOffset;
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// Lower-right
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quadrants[quadIndex] = new Point[] {
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new Point(clipX2 + 1 + xOffset, bottomY - yOffset),
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new Point(rightX - xOffset, bottomY - yOffset),
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new Point(rightX - xOffset, clipY2 + 1 + yOffset),
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};
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if (testImage != null) {
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testImage.flush();
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}
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testW = getWidth();
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testH = getHeight();
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testImage = createVolatileImage(testW, testH);
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Graphics g = testImage.getGraphics();
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do {
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int valCode = testImage.validate(getGraphicsConfiguration());
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if (valCode == VolatileImage.IMAGE_INCOMPATIBLE) {
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testImage.flush();
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testImage = createVolatileImage(testW, testH);
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g = testImage.getGraphics();
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}
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drawLineGrid(screenGraphics, g);
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} while (testImage.contentsLost());
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if (dynamic) {
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// Draw clip box if dynamic
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g.setClip(null);
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g.setColor(Color.black);
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g.drawRect(clipX1, clipY1, clipSize, clipSize);
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screenGraphics.drawImage(testImage, 0, 0, this);
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}
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runTestDone = true;
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}
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/**
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* When running -dynamic, resize the clip bounds and run the test
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* over and over
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*/
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public void run() {
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while (true) {
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clipSize += clipBumpVal;
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if (clipSize > getWidth() || clipSize < 0) {
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clipBumpVal = -clipBumpVal;
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clipSize += clipBumpVal;
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}
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update(getGraphics());
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try {
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Thread.sleep(50);
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} catch (Exception e) {}
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}
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}
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public static void main(String args[]) {
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for (int i = 0; i < args.length; ++i) {
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if (args[i].equals("-dynamic")) {
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dynamic = true;
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} else if (args[i].equals("-rect")) {
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rectTest = true;
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} else if (args[i].equals("-quick")) {
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quickTest = true;
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} else if (args[i].equals("-keep")) {
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keepRunning = true;
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} else {
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// could be clipSize
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try {
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clipSize = Integer.parseInt(args[i]);
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} catch (Exception e) {}
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}
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}
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f = new Frame();
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f.setSize(500, 500);
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LineClipTest test = new LineClipTest();
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f.add(test);
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if (dynamic) {
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Thread t = new Thread(test);
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t.start();
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}
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f.setVisible(true);
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while (!runTestDone) {
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// need to make sure jtreg doesn't exit before the
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// test is done...
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try {
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Thread.sleep(50);
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} catch (Exception e) {}
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}
|
|
}
|
|
}
|