15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.awt.image;
27
28 import java.io.*;
29 import java.util.*;
30 import java.util.zip.*;
31 import java.awt.image.*;
32 import java.awt.Color;
33
34 /** PNG - Portable Network Graphics - image file reader.
35 See <a href=ftp://ds.internic.net/rfc/rfc2083.txt>RFC2083</a> for details. */
36
37 /* this is changed
38 public class PNGImageDecoder extends FilterInputStream implements Runnable
39 { */
40
41 public class PNGImageDecoder extends ImageDecoder
42 {
43 private static final int GRAY=0;
44 private static final int PALETTE=1;
45 private static final int COLOR=2;
46 private static final int ALPHA=4;
47
48 private static final int bKGDChunk = 0x624B4744;
49 private static final int cHRMChunk = 0x6348524D;
50 private static final int gAMAChunk = 0x67414D41;
51 private static final int hISTChunk = 0x68495354;
52 private static final int IDATChunk = 0x49444154;
53 private static final int IENDChunk = 0x49454E44;
54 private static final int IHDRChunk = 0x49484452;
55 private static final int PLTEChunk = 0x504C5445;
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15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.awt.image;
27
28 import java.io.*;
29 import java.util.*;
30 import java.util.zip.*;
31 import java.awt.image.*;
32 import java.awt.Color;
33
34 /** PNG - Portable Network Graphics - image file reader.
35 See <a href=http://www.ietf.org/rfc/rfc2083.txt>RFC2083</a> for details. */
36
37 /* this is changed
38 public class PNGImageDecoder extends FilterInputStream implements Runnable
39 { */
40
41 public class PNGImageDecoder extends ImageDecoder
42 {
43 private static final int GRAY=0;
44 private static final int PALETTE=1;
45 private static final int COLOR=2;
46 private static final int ALPHA=4;
47
48 private static final int bKGDChunk = 0x624B4744;
49 private static final int cHRMChunk = 0x6348524D;
50 private static final int gAMAChunk = 0x67414D41;
51 private static final int hISTChunk = 0x68495354;
52 private static final int IDATChunk = 0x49444154;
53 private static final int IENDChunk = 0x49454E44;
54 private static final int IHDRChunk = 0x49484452;
55 private static final int PLTEChunk = 0x504C5445;
|