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comparison dwt/internal/image/JPEGScanHeader.d @ 34:5123b17c98ef

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Ported dwt.events.*, dwt.graphics.GC, Region, dwt.internal.image.*
author Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
date Sun, 14 Sep 2008 01:45:57 +0200
parents e831403a80a9
children
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33:965ac0a77267 34:5123b17c98ef
5 * which accompanies this distribution, and is available at 5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html 6 * http://www.eclipse.org/legal/epl-v10.html
7 * 7 *
8 * Contributors: 8 * Contributors:
9 * IBM Corporation - initial API and implementation 9 * IBM Corporation - initial API and implementation
10 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
10 *******************************************************************************/ 12 *******************************************************************************/
11 module dwt.internal.image; 13 module dwt.internal.image.JPEGScanHeader;
12
13 14
14 import dwt.DWT; 15 import dwt.DWT;
16 import dwt.internal.image.JPEGVariableSizeSegment;
17 import dwt.internal.image.LEDataInputStream;
18 import dwt.internal.image.JPEGFileFormat;
19 import dwt.dwthelper.utils;
15 20
16 final class JPEGScanHeader : JPEGVariableSizeSegment { 21 final class JPEGScanHeader : JPEGVariableSizeSegment {
17 public int[][] componentParameters; 22 public int[][] componentParameters;
18 23
19 public this(byte[] reference) { 24 public this(byte[] reference) {
46 } 51 }
47 52
48 /* Used when decoding. */ 53 /* Used when decoding. */
49 void initializeComponentParameters() { 54 void initializeComponentParameters() {
50 int compCount = getNumberOfImageComponents(); 55 int compCount = getNumberOfImageComponents();
51 componentParameters = new int[0][]; 56 componentParameters = null;
52 for (int i = 0; i < compCount; i++) { 57 for (int i = 0; i < compCount; i++) {
53 int ofs = 5 + i * 2; 58 int ofs = 5 + i * 2;
54 int cid = reference[ofs] & 0xFF; 59 int cid = reference[ofs] & 0xFF;
55 int dc = (reference[ofs + 1] & 0xFF) >> 4; 60 int dc = (reference[ofs + 1] & 0xFF) >> 4;
56 int ac = reference[ofs + 1] & 0xF; 61 int ac = reference[ofs + 1] & 0xF;
57 if (componentParameters.length <= cid) { 62 if (componentParameters.length <= cid) {
58 int[][] newParams = new int[cid + 1][]; 63 int[][] newParams = new int[][](cid + 1);
59 System.arraycopy(componentParameters, 0, newParams, 0, componentParameters.length); 64 System.arraycopy(componentParameters, 0, newParams, 0, componentParameters.length);
60 componentParameters = newParams; 65 componentParameters = newParams;
61 } 66 }
62 componentParameters[cid] = new int[] { dc, ac }; 67 componentParameters[cid] = [ dc, ac ];
63 } 68 }
64 } 69 }
65 70
66 /* Used when encoding. */ 71 /* Used when encoding. */
67 public void initializeContents() { 72 public void initializeContents() {
88 93
89 public void setStartOfSpectralSelection(int anInteger) { 94 public void setStartOfSpectralSelection(int anInteger) {
90 reference[(2 * getNumberOfImageComponents()) + 5] = cast(byte)anInteger; 95 reference[(2 * getNumberOfImageComponents()) + 5] = cast(byte)anInteger;
91 } 96 }
92 97
93 public int signature() { 98 public override int signature() {
94 return JPEGFileFormat.SOS; 99 return JPEGFileFormat.SOS;
95 } 100 }
96 101
97 public bool verifyProgressiveScan() { 102 public bool verifyProgressiveScan() {
98 int start = getStartOfSpectralSelection(); 103 int start = getStartOfSpectralSelection();