6800846: REGRESSION: Printing quality degraded with Java 6 compared to 5.0

Reviewed-by: igor, prr

src/share/native/sun/awt/image/dither.c

@@ -169,6 +169,7 @@ initCubemap(int* cmap,
     int cubesize = cube_dim * cube_dim * cube_dim;
     unsigned char *useFlags;
     unsigned char *newILut = (unsigned char*)malloc(cubesize);
+    int cmap_mid = (cmap_len >> 1) + (cmap_len & 0x1);
     if (newILut) {
 
       useFlags = (unsigned char *)calloc(cubesize, 1);
@@ -188,7 +189,7 @@ initCubemap(int* cmap,
         currentState.iLUT           = newILut;
 
         currentState.rgb = (unsigned short *)
-                                malloc(256 * sizeof(unsigned short));
+                                malloc(cmap_len * sizeof(unsigned short));
         if (currentState.rgb == NULL) {
             free(newILut);
             free(useFlags);
@@ -199,7 +200,7 @@ initCubemap(int* cmap,
         }
 
         currentState.indices = (unsigned char *)
-                                malloc(256 * sizeof(unsigned char));
+                                malloc(cmap_len * sizeof(unsigned char));
         if (currentState.indices == NULL) {
             free(currentState.rgb);
             free(newILut);
@@ -210,18 +211,18 @@ initCubemap(int* cmap,
             return NULL;
         }
 
-        for (i = 0; i < 128; i++) {
+        for (i = 0; i < cmap_mid; i++) {
             unsigned short rgb;
             int pixel = cmap[i];
             rgb = (pixel & 0x00f80000) >> 9;
             rgb |= (pixel & 0x0000f800) >> 6;
             rgb |=  (pixel & 0xf8) >> 3;
             INSERTNEW(currentState, rgb, i);
-            pixel = cmap[255-i];
+            pixel = cmap[cmap_len - i - 1];
             rgb = (pixel & 0x00f80000) >> 9;
             rgb |= (pixel & 0x0000f800) >> 6;
             rgb |=  (pixel & 0xf8) >> 3;
-            INSERTNEW(currentState, rgb, 255-i);
+            INSERTNEW(currentState, rgb, cmap_len - i - 1);
         }
 
         if (!recurseLevel(&currentState)) {

test/sun/awt/image/DrawByteBinary.java

+/*
+ * Copyright 2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/**
+ * @test
+ * @bug     6800846
+ *
+ * @summary Test verifes that images with short palette are rendered
+ *          withourt artifacts.
+ *
+ * @run     main DrawByteBinary
+ */
+
+
+import java.awt.*;
+import java.awt.color.*;
+import java.awt.image.*;
+import static java.awt.image.BufferedImage.*;
+
+
+public class DrawByteBinary {
+
+    public static void main(String args[]) {
+        int w = 100, h = 30;
+        int x = 10;
+        byte[] arr = {(byte)0xff, (byte)0x0, (byte)0x00};
+
+        IndexColorModel newCM = new IndexColorModel(1, 2, arr, arr, arr);
+        BufferedImage orig = new BufferedImage(w, h, TYPE_BYTE_BINARY, newCM);
+        Graphics2D g2d = orig.createGraphics();
+        g2d.setColor(Color.white);
+        g2d.fillRect(0, 0, w, h);
+        g2d.setColor(Color.black);
+        g2d.drawLine(x, 0, x, h);
+        g2d.dispose();
+
+        IndexColorModel origCM = (IndexColorModel)orig.getColorModel();
+        BufferedImage test = new BufferedImage(w, h, TYPE_BYTE_BINARY,origCM);
+        g2d = test.createGraphics();
+        g2d.drawImage(orig, 0, 0, null);
+        g2d.dispose();
+
+        int y = h / 2;
+
+        // we expect white color outside the line
+        if (test.getRGB(x - 1, y) != 0xffffffff) {
+            throw new RuntimeException("Invalid color outside the line.");
+        }
+
+        // we expect black color on the line
+        if (test.getRGB(x, y) != 0xff000000) {
+            throw new RuntimeException("Invalid color on the line.");
+        }
+    }
+}