projects/dwt2: org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/internal/image/JPEGFrameHeader.d annotate

author	Frank Benoit <benoit@tionex.de>
date	Mon, 02 Mar 2009 14:44:16 +0100
parents
children

rev	line source
0 6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	1 /*******************************************************************************
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	2 * Copyright (c) 2000, 2005 IBM Corporation and others.
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	3 * All rights reserved. This program and the accompanying materials
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	4 * are made available under the terms of the Eclipse Public License v1.0
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	5 * which accompanies this distribution, and is available at
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	6 * http://www.eclipse.org/legal/epl-v10.html
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	7 *
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	8 * Contributors:
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	9 * IBM Corporation - initial API and implementation
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	10 * Port to the D programming language:
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	11 * Frank Benoit <benoit@tionex.de>
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	12 *******************************************************************************/
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	13 module org.eclipse.swt.internal.image.JPEGFrameHeader;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	14
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	15
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	16 import org.eclipse.swt.SWT;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	17 import org.eclipse.swt.internal.image.JPEGVariableSizeSegment;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	18 import org.eclipse.swt.internal.image.JPEGFileFormat;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	19 import org.eclipse.swt.internal.image.LEDataInputStream;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	20 import java.lang.all;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	21
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	22 final class JPEGFrameHeader : JPEGVariableSizeSegment {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	23 int maxVFactor;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	24 int maxHFactor;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	25 public int[] componentIdentifiers;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	26 public int[][] componentParameters;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	27
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	28 public this(byte[] reference) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	29 super(reference);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	30 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	31
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	32 public this(LEDataInputStream byteStream) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	33 super(byteStream);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	34 initializeComponentParameters();
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	35 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	36
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	37 public int getSamplePrecision() {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	38 return reference[4] & 0xFF;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	39 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	40
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	41 public int getNumberOfLines() {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	42 return (reference[5] & 0xFF) << 8 \| (reference[6] & 0xFF);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	43 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	44
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	45 public int getSamplesPerLine() {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	46 return (reference[7] & 0xFF) << 8 \| (reference[8] & 0xFF);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	47 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	48
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	49 public int getNumberOfImageComponents() {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	50 return reference[9] & 0xFF;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	51 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	52
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	53 public void setSamplePrecision(int precision) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	54 reference[4] = cast(byte)(precision & 0xFF);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	55 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	56
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	57 public void setNumberOfLines(int anInteger) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	58 reference[5] = cast(byte)((anInteger & 0xFF00) >> 8);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	59 reference[6] = cast(byte)(anInteger & 0xFF);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	60 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	61
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	62 public void setSamplesPerLine(int samples) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	63 reference[7] = cast(byte)((samples & 0xFF00) >> 8);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	64 reference[8] = cast(byte)(samples & 0xFF);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	65 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	66
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	67 public void setNumberOfImageComponents(int anInteger) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	68 reference[9] = cast(byte)(anInteger & 0xFF);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	69 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	70
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	71 public int getMaxHFactor() {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	72 return maxHFactor;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	73 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	74
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	75 public int getMaxVFactor() {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	76 return maxVFactor;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	77 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	78
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	79 public void setMaxHFactor(int anInteger) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	80 maxHFactor = anInteger;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	81 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	82
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	83 public void setMaxVFactor(int anInteger) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	84 maxVFactor = anInteger;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	85 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	86
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	87 /* Used when decoding. */
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	88 void initializeComponentParameters() {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	89 int nf = getNumberOfImageComponents();
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	90 componentIdentifiers = new int[nf];
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	91 int[][] compSpecParams;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	92 int hmax = 1;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	93 int vmax = 1;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	94 for (int i = 0; i < nf; i++) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	95 int ofs = i * 3 + 10;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	96 int ci = reference[ofs] & 0xFF;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	97 componentIdentifiers[i] = ci;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	98 int hi = (reference[ofs + 1] & 0xFF) >> 4;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	99 int vi = reference[ofs + 1] & 0xF;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	100 int tqi = reference[ofs + 2] & 0xFF;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	101 if (hi > hmax) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	102 hmax = hi;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	103 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	104 if (vi > vmax) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	105 vmax = vi;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	106 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	107 int[] compParam = new int[5];
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	108 compParam[0] = tqi;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	109 compParam[1] = hi;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	110 compParam[2] = vi;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	111 if (compSpecParams.length <= ci) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	112 int[][] newParams = new int[][](ci + 1);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	113 System.arraycopy(compSpecParams, 0, newParams, 0, compSpecParams.length);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	114 compSpecParams = newParams;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	115 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	116 compSpecParams[ci] = compParam;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	117 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	118 int x = getSamplesPerLine();
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	119 int y = getNumberOfLines();
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	120 int[] multiples = [ 8, 16, 24, 32 ];
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	121 for (int i = 0; i < nf; i++) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	122 int[] compParam = compSpecParams[componentIdentifiers[i]];
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	123 int hi = compParam[1];
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	124 int vi = compParam[2];
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	125 int compWidth = (x * hi + hmax - 1) / hmax;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	126 int compHeight = (y * vi + vmax - 1) / vmax;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	127 int dsWidth = roundUpToMultiple(compWidth, multiples[hi - 1]);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	128 int dsHeight = roundUpToMultiple(compHeight, multiples[vi - 1]);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	129 compParam[3] = dsWidth;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	130 compParam[4] = dsHeight;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	131 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	132 setMaxHFactor(hmax);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	133 setMaxVFactor(vmax);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	134 componentParameters = compSpecParams;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	135 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	136
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	137 /* Used when encoding. */
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	138 public void initializeContents() {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	139 int nf = getNumberOfImageComponents();
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	140 if (nf is 0 \|\| nf !is componentParameters.length) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	141 SWT.error(SWT.ERROR_INVALID_IMAGE);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	142 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	143 int hmax = 0;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	144 int vmax = 0;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	145 int[][] compSpecParams = componentParameters;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	146 for (int i = 0; i < nf; i++) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	147 int ofs = i * 3 + 10;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	148 int[] compParam = compSpecParams[componentIdentifiers[i]];
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	149 int hi = compParam[1];
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	150 int vi = compParam[2];
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	151 if (hi * vi > 4) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	152 SWT.error(SWT.ERROR_INVALID_IMAGE);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	153 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	154 reference[ofs] = cast(byte)(i + 1);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	155 reference[ofs + 1] = cast(byte)(hi * 16 + vi);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	156 reference[ofs + 2] = cast(byte)(compParam[0]);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	157 if (hi > hmax) hmax = hi;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	158 if (vi > vmax) vmax = vi;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	159 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	160 int x = getSamplesPerLine();
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	161 int y = getNumberOfLines();
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	162 int[] multiples = [8, 16, 24, 32];
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	163 for (int i = 0; i < nf; i++) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	164 int[] compParam = compSpecParams[componentIdentifiers[i]];
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	165 int hi = compParam[1];
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	166 int vi = compParam[2];
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	167 int compWidth = (x * hi + hmax - 1) / hmax;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	168 int compHeight = (y * vi + vmax - 1) / vmax;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	169 int dsWidth = roundUpToMultiple(compWidth, multiples[hi - 1]);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	170 int dsHeight = roundUpToMultiple(compHeight, multiples[vi - 1]);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	171 compParam[3] = dsWidth;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	172 compParam[4] = dsHeight;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	173 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	174 setMaxHFactor(hmax);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	175 setMaxVFactor(vmax);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	176 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	177
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	178 int roundUpToMultiple(int anInteger, int mInteger) {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	179 int a = anInteger + mInteger - 1;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	180 return a - (a % mInteger);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	181 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	182
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	183 /*
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	184 * Verify the information contained in the receiver is correct.
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	185 * Answer true if the header contains a valid marker. Otherwise,
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	186 * answer false. Valid Start Of Frame markers are:
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	187 * SOF_0 - Baseline DCT, Huffman coding
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	188 * SOF_1 - Extended sequential DCT, Huffman coding
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	189 * SOF_2 - Progressive DCT, Huffman coding
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	190 * SOF_3 - Lossless (sequential), Huffman coding
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	191 * SOF_5 - Differential sequential, Huffman coding
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	192 * SOF_6 - Differential progressive, Huffman coding
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	193 * SOF_7 - Differential lossless, Huffman coding
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	194 * SOF_9 - Extended sequential DCT, arithmetic coding
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	195 * SOF_10 - Progressive DCT, arithmetic coding
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	196 * SOF_11 - Lossless (sequential), arithmetic coding
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	197 * SOF_13 - Differential sequential, arithmetic coding
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	198 * SOF_14 - Differential progressive, arithmetic coding
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	199 * SOF_15 - Differential lossless, arithmetic coding
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	200 */
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	201 public override bool verify() {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	202 int marker = getSegmentMarker();
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	203 return (marker >= JPEGFileFormat.SOF0 && marker <= JPEGFileFormat.SOF3) \|\|
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	204 (marker >= JPEGFileFormat.SOF5 && marker <= JPEGFileFormat.SOF7) \|\|
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	205 (marker >= JPEGFileFormat.SOF9 && marker <= JPEGFileFormat.SOF11) \|\|
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	206 (marker >= JPEGFileFormat.SOF13 && marker <= JPEGFileFormat.SOF15);
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	207 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	208
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	209 public bool isProgressive() {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	210 int marker = getSegmentMarker();
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	211 return marker is JPEGFileFormat.SOF2
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	212 \|\| marker is JPEGFileFormat.SOF6
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	213 \|\| marker is JPEGFileFormat.SOF10
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	214 \|\| marker is JPEGFileFormat.SOF14;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	215 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	216
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	217 public bool isArithmeticCoding() {
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	218 return getSegmentMarker() >= JPEGFileFormat.SOF9;
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	219 }
6dd524f61e62 add dwt win and basic java stuff Frank Benoit <benoit@tionex.de> parents: diff changeset	220 }

0

6dd524f61e62 add dwt win and basic java stuff