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annotate org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/internal/image/PngEncoder.d @ 6:f36c67707cb3

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Removed import to tango.core.Exception
author Frank Benoit <benoit@tionex.de>
date Thu, 05 Mar 2009 00:18:47 +0100
parents 6dd524f61e62
children 536e43f63c81
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2007 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module org.eclipse.swt.internal.image.PngEncoder;
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14
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f36c67707cb3 Removed import to tango.core.Exception
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15 import java.lang.all;
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16
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17 import org.eclipse.swt.internal.image.LEDataOutputStream;
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18 import org.eclipse.swt.internal.image.PngDeflater;
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19 import java.io.ByteArrayOutputStream;
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20 import java.io.OutputStream;
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21 import org.eclipse.swt.SWT;
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22 import org.eclipse.swt.graphics.ImageData;
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23 import org.eclipse.swt.graphics.ImageLoader;
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24 import org.eclipse.swt.graphics.RGB;
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25 import org.eclipse.swt.internal.Compatibility;
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26 import org.eclipse.swt.internal.image.PngChunk;
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27
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28
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29 final class PngEncoder {
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30
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31 static const byte SIGNATURE[] = [cast(byte) '\211', cast(byte) 'P', cast(byte) 'N', cast(byte) 'G', cast(byte) '\r', cast(byte) '\n', cast(byte) '\032', cast(byte) '\n'];
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32 static const byte TAG_IHDR[] = [cast(byte) 'I', cast(byte) 'H', cast(byte) 'D', cast(byte) 'R'];
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33 static const byte TAG_PLTE[] = [cast(byte) 'P', cast(byte) 'L', cast(byte) 'T', cast(byte) 'E'];
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34 static const byte TAG_TRNS[] = [cast(byte) 't', cast(byte) 'R', cast(byte) 'N', cast(byte) 'S'];
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35 static const byte TAG_IDAT[] = [cast(byte) 'I', cast(byte) 'D', cast(byte) 'A', cast(byte) 'T'];
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36 static const byte TAG_IEND[] = [cast(byte) 'I', cast(byte) 'E', cast(byte) 'N', cast(byte) 'D'];
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37
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38 ByteArrayOutputStream bytes;
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39 PngChunk chunk;
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40
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41 ImageLoader loader;
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42 ImageData data;
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43 int transparencyType;
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44
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45 int width, height, bitDepth, colorType;
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46
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47 int compressionMethod = 0;
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48 int filterMethod = 0;
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49 int interlaceMethod = 0;
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50
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51 public this(ImageLoader loader) {
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52 this.bytes = new ByteArrayOutputStream(1024);
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53 this.loader = loader;
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54 this.data = loader.data[0];
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55 this.transparencyType = data.getTransparencyType();
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56
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57 this.width = data.width;
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58 this.height = data.height;
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59
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60 this.bitDepth = 8;
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61
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62 this.colorType = 2;
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63
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64 if (data.palette.isDirect) {
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65 if (transparencyType is SWT.TRANSPARENCY_ALPHA) {
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66 this.colorType = 6;
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67 }
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68 }
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69 else {
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70 this.colorType = 3;
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71 }
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72
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73 if (!(colorType is 2 || colorType is 3 || colorType is 6)) SWT.error(SWT.ERROR_INVALID_IMAGE);
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74
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75 }
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76
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77 void writeShort(ByteArrayOutputStream baos, int theShort) {
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78
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79 byte byte1 = cast(byte) ((theShort >> 8) & 0xff);
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80 byte byte2 = cast(byte) (theShort & 0xff);
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81 byte[] temp = [byte1, byte2];
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82 baos.write(temp, 0, 2);
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83
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84 }
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85
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86 void writeInt(ByteArrayOutputStream baos, int theInt) {
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87
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88 byte byte1 = cast(byte) ((theInt >> 24) & 0xff);
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89 byte byte2 = cast(byte) ((theInt >> 16) & 0xff);
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90 byte byte3 = cast(byte) ((theInt >> 8) & 0xff);
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91 byte byte4 = cast(byte) (theInt & 0xff);
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92 byte[] temp = [byte1, byte2, byte3, byte4];
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93 baos.write(temp, 0, 4);
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94
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95 }
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96
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97 void writeChunk(byte[] tag, byte[] buffer) {
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98
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99 int bufferLength = (buffer !is null) ? buffer.length : 0;
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100
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101 chunk = new PngChunk(bufferLength);
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102
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103 writeInt(bytes, bufferLength);
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104 bytes.write(tag, 0, 4);
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105 chunk.setType(tag);
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106 if (bufferLength !is 0) {
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107 bytes.write(buffer, 0, bufferLength);
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108 chunk.setData(buffer);
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109 }
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110 else {
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111 chunk.setCRC(chunk.computeCRC());
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112 }
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113 writeInt(bytes, chunk.getCRC());
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114
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115 }
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116
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117 void writeSignature() {
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118
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119 bytes.write(SIGNATURE, 0, 8);
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120
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121 }
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122
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123 void writeHeader() {
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124
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125 ByteArrayOutputStream baos = new ByteArrayOutputStream(13);
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126
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127 writeInt(baos, width);
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128 writeInt(baos, height);
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129 baos.write(bitDepth);
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130 baos.write(colorType);
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131 baos.write(compressionMethod);
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132 baos.write(filterMethod);
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133 baos.write(interlaceMethod);
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134
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135 writeChunk(TAG_IHDR, baos.toByteArray());
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136
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137 }
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138
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139 void writePalette() {
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140
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141 RGB[] RGBs = data.palette.getRGBs();
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142
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143 if (RGBs.length > 256) SWT.error(SWT.ERROR_INVALID_IMAGE);
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144
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145 ByteArrayOutputStream baos = new ByteArrayOutputStream(RGBs.length);
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146
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147 for (int i = 0; i < RGBs.length; i++) {
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148
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149 baos.write(cast(byte) RGBs[i].red);
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150 baos.write(cast(byte) RGBs[i].green);
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151 baos.write(cast(byte) RGBs[i].blue);
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152
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153 }
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154
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155 writeChunk(TAG_PLTE, baos.toByteArray());
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156
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
157 }
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
158
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
159 void writeTransparency() {
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
160
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
161 ByteArrayOutputStream baos = new ByteArrayOutputStream();
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
162
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
163 switch (transparencyType) {
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
164
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
165 case SWT.TRANSPARENCY_ALPHA:
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
166
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
167 int pixelValue, alphaValue;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
168
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
169 byte[] alphas = new byte[data.palette.getRGBs().length];
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
170
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
171 for (int y = 0; y < height; y++) {
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
172
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
173 for (int x = 0; x < width; x++) {
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
174
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
175 pixelValue = data.getPixel(x, y);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
176 alphaValue = data.getAlpha(x, y);
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 alphas[pixelValue] = cast(byte) alphaValue;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
179
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
180 }
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 baos.write(alphas, 0, alphas.length);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
185
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
186 break;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
187
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
188 case SWT.TRANSPARENCY_PIXEL:
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
189
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
190 int pixel = data.transparentPixel;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
191
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
192 if (colorType is 2) {
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
193
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
194 int redMask = data.palette.redMask;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
195 int redShift = data.palette.redShift;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
196 int greenMask = data.palette.greenMask;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
197 int greenShift = data.palette.greenShift;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
198 int blueShift = data.palette.blueShift;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
199 int blueMask = data.palette.blueMask;
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 int r = pixel & redMask;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
202 r = (redShift < 0) ? r >>> -redShift : r << redShift;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
203 int g = pixel & greenMask;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
204 g = (greenShift < 0) ? g >>> -greenShift : g << greenShift;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
205 int b = pixel & blueMask;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
206 b = (blueShift < 0) ? b >>> -blueShift : b << blueShift;
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 writeShort(baos, r);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
209 writeShort(baos, g);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
210 writeShort(baos, b);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
211
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
212 }
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
213
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
214 if (colorType is 3) {
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 byte[] padding = new byte[pixel + 1];
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
217
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
218 for (int i = 0; i < pixel; i++) {
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 padding[i] = cast(byte) 255;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
221
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
222 }
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
223
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
224 padding[pixel] = cast(byte) 0;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
225
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
226 baos.write(padding, 0, padding.length);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
227
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
228 }
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
229
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
230 break;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
231 default:
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
232
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
233 }
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
234
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
235 writeChunk(TAG_TRNS, baos.toByteArray());
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
236
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
237 }
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
238
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
239 void writeImageData() {
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
240
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
241 ByteArrayOutputStream baos = new ByteArrayOutputStream(1024);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
242 OutputStream os = Compatibility.newDeflaterOutputStream(baos);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
243 if (os is null) os = baos;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
244
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
245 if (colorType is 3) {
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
246
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
247 byte[] lineData = new byte[width];
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
248
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
249 for (int y = 0; y < height; y++) {
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
250
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
251 int filter = 0;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
252 os.write(filter);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
253
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
254 data.getPixels(0, y, width, lineData, 0);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
255
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
256 for (int x = 0; x < lineData.length; x++) {
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
257
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
258 os.write(lineData[x]);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
259
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
260 }
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
261
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
262 }
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
263
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
264 }
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
265
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
266 else {
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
267
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
268 int[] lineData = new int[width];
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
269 byte[] alphaData = null;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
270 if (colorType is 6) {
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
271 alphaData = new byte[width];
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
272 }
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
273
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
274 int redMask = data.palette.redMask;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
275 int redShift = data.palette.redShift;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
276 int greenMask = data.palette.greenMask;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
277 int greenShift = data.palette.greenShift;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
278 int blueShift = data.palette.blueShift;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
279 int blueMask = data.palette.blueMask;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
280
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
281 for (int y = 0; y < height; y++) {
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
282
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
283 int filter = 0;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
284 os.write(filter);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
285
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
286 data.getPixels(0, y, width, lineData, 0);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
287
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
288 if (colorType is 6) {
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
289 data.getAlphas(0, y, width, alphaData, 0);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
290 }
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
291
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
292 for (int x = 0; x < lineData.length; x++) {
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
293
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
294 int pixel = lineData[x];
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
295
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
296 int r = pixel & redMask;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
297 r = (redShift < 0) ? r >>> -redShift : r << redShift;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
298 int g = pixel & greenMask;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
299 g = (greenShift < 0) ? g >>> -greenShift : g << greenShift;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
300 int b = pixel & blueMask;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
301 b = (blueShift < 0) ? b >>> -blueShift : b << blueShift;
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
302
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
303 os.write(r);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
304 os.write(g);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
305 os.write(b);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
306
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
307 if (colorType is 6) {
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
308 os.write(alphaData[x]);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
309 }
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
310
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
311 }
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
312
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
313 }
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
314
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
315 }
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
316
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
317 os.flush();
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
318 os.close();
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
319
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
320 byte[] compressed = baos.toByteArray();
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
321 if (os is baos) {
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
322 PngDeflater deflater = new PngDeflater();
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
323 compressed = deflater.deflate(compressed);
6dd524f61e62 add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
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324 }
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325
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326 writeChunk(TAG_IDAT, compressed);
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327
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328 }
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329
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330 void writeEnd() {
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331
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332 writeChunk(TAG_IEND, null);
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333
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334 }
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335
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336 public void encode(LEDataOutputStream outputStream) {
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337
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338 try {
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339
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340 writeSignature();
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341 writeHeader();
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342
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343 if (colorType is 3) {
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344 writePalette();
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345 }
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346
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347 bool transparencyAlpha = (transparencyType is SWT.TRANSPARENCY_ALPHA);
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348 bool transparencyPixel = (transparencyType is SWT.TRANSPARENCY_PIXEL);
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349 bool type2Transparency = (colorType is 2 && transparencyPixel);
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350 bool type3Transparency = (colorType is 3 && (transparencyAlpha || transparencyPixel));
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351
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352 if (type2Transparency || type3Transparency) {
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353 writeTransparency();
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354 }
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355
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356 writeImageData();
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357 writeEnd();
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358
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359 outputStream.write(bytes.toByteArray());
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360
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361 }
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362
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363 catch (IOException e) {
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364
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365 SWT.error(SWT.ERROR_IO, e);
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366
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367 }
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368
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369 }
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parents:
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370
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371 }