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25
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2008 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.WinICOFileFormat;
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14
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15 import org.eclipse.swt.internal.image.FileFormat;
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16 import org.eclipse.swt.graphics.PaletteData;
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17 import org.eclipse.swt.internal.image.WinBMPFileFormat;
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18 import org.eclipse.swt.SWT;
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19 import java.lang.all;
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20
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21
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22 public final class WinICOFileFormat : FileFormat {
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23
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24 byte[] bitInvertData(byte[] data, int startIndex, int endIndex) {
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25 // Destructively bit invert data in the given byte array.
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26 for (int i = startIndex; i < endIndex; i++) {
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27 data[i] = cast(byte)(255 - data[i - startIndex]);
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28 }
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29 return data;
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30 }
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31
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32 static final byte[] convertPad(byte[] data, int width, int height, int depth, int pad, int newPad) {
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33 if (pad is newPad) return data;
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34 int stride = (width * depth + 7) / 8;
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35 int bpl = (stride + (pad - 1)) / pad * pad;
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36 int newBpl = (stride + (newPad - 1)) / newPad * newPad;
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37 byte[] newData = new byte[height * newBpl];
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38 int srcIndex = 0, destIndex = 0;
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39 for (int y = 0; y < height; y++) {
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40 System.arraycopy(data, srcIndex, newData, destIndex, newBpl);
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41 srcIndex += bpl;
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42 destIndex += newBpl;
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43 }
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44 return newData;
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45 }
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46 /**
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47 * Answer the size in bytes of the file representation of the given
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48 * icon
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49 */
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50 int iconSize(ImageData i) {
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51 int shapeDataStride = (i.width * i.depth + 31) / 32 * 4;
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52 int maskDataStride = (i.width + 31) / 32 * 4;
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53 int dataSize = (shapeDataStride + maskDataStride) * i.height;
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54 int paletteSize = i.palette.colors !is null ? i.palette.colors.length * 4 : 0;
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55 return WinBMPFileFormat.BMPHeaderFixedSize + paletteSize + dataSize;
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56 }
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57 override bool isFileFormat(LEDataInputStream stream) {
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58 try {
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59 byte[] header = new byte[4];
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60 stream.read(header);
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61 stream.unread(header);
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62 return header[0] is 0 && header[1] is 0 && header[2] is 1 && header[3] is 0;
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63 } catch (Exception e) {
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64 return false;
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65 }
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66 }
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67 bool isValidIcon(ImageData i) {
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68 switch (i.depth) {
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69 case 1:
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70 case 4:
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71 case 8:
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72 if (i.palette.isDirect) return false;
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73 int size = i.palette.colors.length;
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74 return size is 2 || size is 16 || size is 32 || size is 256;
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75 case 24:
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76 case 32:
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77 return i.palette.isDirect;
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78 default:
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79 }
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80 return false;
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81 }
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82 int loadFileHeader(LEDataInputStream byteStream) {
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83 int[] fileHeader = new int[3];
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84 try {
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85 fileHeader[0] = byteStream.readShort();
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86 fileHeader[1] = byteStream.readShort();
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87 fileHeader[2] = byteStream.readShort();
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88 } catch (IOException e) {
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89 SWT.error(SWT.ERROR_IO, e);
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90 }
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91 if ((fileHeader[0] !is 0) || (fileHeader[1] !is 1))
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92 SWT.error(SWT.ERROR_INVALID_IMAGE);
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93 int numIcons = fileHeader[2];
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94 if (numIcons <= 0)
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95 SWT.error(SWT.ERROR_INVALID_IMAGE);
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96 return numIcons;
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97 }
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98 int loadFileHeader(LEDataInputStream byteStream, bool hasHeader) {
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99 int[] fileHeader = new int[3];
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100 try {
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101 if (hasHeader) {
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102 fileHeader[0] = byteStream.readShort();
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103 fileHeader[1] = byteStream.readShort();
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104 } else {
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105 fileHeader[0] = 0;
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106 fileHeader[1] = 1;
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107 }
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108 fileHeader[2] = byteStream.readShort();
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109 } catch (IOException e) {
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110 SWT.error(SWT.ERROR_IO, e);
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111 }
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112 if ((fileHeader[0] !is 0) || (fileHeader[1] !is 1))
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113 SWT.error(SWT.ERROR_INVALID_IMAGE);
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114 int numIcons = fileHeader[2];
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115 if (numIcons <= 0)
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116 SWT.error(SWT.ERROR_INVALID_IMAGE);
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117 return numIcons;
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118 }
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119 override ImageData[] loadFromByteStream() {
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120 int numIcons = loadFileHeader(inputStream);
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121 int[][] headers = loadIconHeaders(numIcons);
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122 ImageData[] icons = new ImageData[headers.length];
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123 for (int i = 0; i < icons.length; i++) {
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124 icons[i] = loadIcon(headers[i]);
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125 }
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126 return icons;
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127 }
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128 /**
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129 * Load one icon from the byte stream.
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130 */
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131 ImageData loadIcon(int[] iconHeader) {
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132 byte[] infoHeader = loadInfoHeader(iconHeader);
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133 WinBMPFileFormat bmpFormat = new WinBMPFileFormat();
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134 bmpFormat.inputStream = inputStream;
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135 PaletteData palette = bmpFormat.loadPalette(infoHeader);
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136 byte[] shapeData = bmpFormat.loadData(infoHeader);
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137 int width = (infoHeader[4] & 0xFF) | ((infoHeader[5] & 0xFF) << 8) | ((infoHeader[6] & 0xFF) << 16) | ((infoHeader[7] & 0xFF) << 24);
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138 int height = (infoHeader[8] & 0xFF) | ((infoHeader[9] & 0xFF) << 8) | ((infoHeader[10] & 0xFF) << 16) | ((infoHeader[11] & 0xFF) << 24);
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139 if (height < 0) height = -height;
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140 int depth = (infoHeader[14] & 0xFF) | ((infoHeader[15] & 0xFF) << 8);
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141 infoHeader[14] = 1;
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142 infoHeader[15] = 0;
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143 byte[] maskData = bmpFormat.loadData(infoHeader);
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144 maskData = convertPad(maskData, width, height, 1, 4, 2);
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145 bitInvertData(maskData, 0, maskData.length);
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146 return ImageData.internal_new(
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147 width,
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148 height,
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149 depth,
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150 palette,
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151 4,
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152 shapeData,
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153 2,
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154 maskData,
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155 null,
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156 -1,
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157 -1,
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158 SWT.IMAGE_ICO,
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159 0,
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160 0,
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161 0,
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162 0);
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163 }
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164 int[][] loadIconHeaders(int numIcons) {
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165 int[][] headers = new int[][]( numIcons, 7 );
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166 try {
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167 for (int i = 0; i < numIcons; i++) {
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168 headers[i][0] = inputStream.read();
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169 headers[i][1] = inputStream.read();
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170 headers[i][2] = inputStream.readShort();
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171 headers[i][3] = inputStream.readShort();
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172 headers[i][4] = inputStream.readShort();
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173 headers[i][5] = inputStream.readInt();
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174 headers[i][6] = inputStream.readInt();
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175 }
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176 } catch (IOException e) {
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177 SWT.error(SWT.ERROR_IO, e);
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178 }
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179 return headers;
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180 }
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181 byte[] loadInfoHeader(int[] iconHeader) {
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182 int width = iconHeader[0];
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183 int height = iconHeader[1];
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184 int numColors = iconHeader[2]; // the number of colors is in the low byte, but the high byte must be 0
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185 if (numColors is 0) numColors = 256; // this is specified: '00' represents '256' (0x100) colors
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186 if ((numColors !is 2) && (numColors !is 8) && (numColors !is 16) &&
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187 (numColors !is 32) && (numColors !is 256))
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188 SWT.error(SWT.ERROR_INVALID_IMAGE);
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189 if (inputStream.getPosition() < iconHeader[6]) {
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190 // Seek to the specified offset
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191 try {
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192 inputStream.skip(iconHeader[6] - inputStream.getPosition());
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193 } catch (IOException e) {
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194 SWT.error(SWT.ERROR_IO, e);
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195 return null;
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196 }
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197 }
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198 byte[] infoHeader = new byte[WinBMPFileFormat.BMPHeaderFixedSize];
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199 try {
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200 inputStream.read(infoHeader);
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201 } catch (IOException e) {
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202 SWT.error(SWT.ERROR_IO, e);
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203 }
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204 if (((infoHeader[12] & 0xFF) | ((infoHeader[13] & 0xFF) << 8)) !is 1)
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205 SWT.error(SWT.ERROR_INVALID_IMAGE);
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206 int infoWidth = (infoHeader[4] & 0xFF) | ((infoHeader[5] & 0xFF) << 8) | ((infoHeader[6] & 0xFF) << 16) | ((infoHeader[7] & 0xFF) << 24);
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207 int infoHeight = (infoHeader[8] & 0xFF) | ((infoHeader[9] & 0xFF) << 8) | ((infoHeader[10] & 0xFF) << 16) | ((infoHeader[11] & 0xFF) << 24);
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208 int bitCount = (infoHeader[14] & 0xFF) | ((infoHeader[15] & 0xFF) << 8);
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209 if (height is infoHeight && bitCount is 1) height /= 2;
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210 if (!((width is infoWidth) && (height * 2 is infoHeight) &&
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211 (bitCount is 1 || bitCount is 4 || bitCount is 8 || bitCount is 24 || bitCount is 32)))
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212 SWT.error(SWT.ERROR_INVALID_IMAGE);
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213 infoHeader[8] = cast(byte)(height & 0xFF);
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214 infoHeader[9] = cast(byte)((height >> 8) & 0xFF);
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215 infoHeader[10] = cast(byte)((height >> 16) & 0xFF);
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216 infoHeader[11] = cast(byte)((height >> 24) & 0xFF);
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217 return infoHeader;
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218 }
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219 /**
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220 * Unload a single icon
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221 */
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222 void unloadIcon(ImageData icon) {
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223 int sizeImage = (((icon.width * icon.depth + 31) / 32 * 4) +
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224 ((icon.width + 31) / 32 * 4)) * icon.height;
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225 try {
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226 outputStream.writeInt(WinBMPFileFormat.BMPHeaderFixedSize);
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227 outputStream.writeInt(icon.width);
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228 outputStream.writeInt(icon.height * 2);
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229 outputStream.writeShort(1);
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230 outputStream.writeShort(cast(short)icon.depth);
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231 outputStream.writeInt(0);
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232 outputStream.writeInt(sizeImage);
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233 outputStream.writeInt(0);
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234 outputStream.writeInt(0);
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235 outputStream.writeInt(icon.palette.colors !is null ? icon.palette.colors.length : 0);
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236 outputStream.writeInt(0);
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237 } catch (IOException e) {
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238 SWT.error(SWT.ERROR_IO, e);
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239 }
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240
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241 byte[] rgbs = WinBMPFileFormat.paletteToBytes(icon.palette);
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242 try {
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243 outputStream.write(rgbs);
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244 } catch (IOException e) {
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245 SWT.error(SWT.ERROR_IO, e);
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246 }
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247 unloadShapeData(icon);
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248 unloadMaskData(icon);
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249 }
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250 /**
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251 * Unload the icon header for the given icon, calculating the offset.
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252 */
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253 void unloadIconHeader(ImageData i) {
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254 int headerSize = 16;
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255 int offset = headerSize + 6;
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256 int iconSize = iconSize(i);
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257 try {
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258 outputStream.write(i.width);
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259 outputStream.write(i.height);
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260 outputStream.writeShort(i.palette.colors !is null ? i.palette.colors.length : 0);
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261 outputStream.writeShort(0);
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262 outputStream.writeShort(0);
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263 outputStream.writeInt(iconSize);
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264 outputStream.writeInt(offset);
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265 } catch (IOException e) {
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266 SWT.error(SWT.ERROR_IO, e);
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267 }
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268 }
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269 override void unloadIntoByteStream(ImageLoader loader) {
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270 /* We do not currently support writing multi-image ico,
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271 * so we use the first image data in the loader's array. */
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272 ImageData image = loader.data[0];
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273 if (!isValidIcon(image))
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274 SWT.error(SWT.ERROR_INVALID_IMAGE);
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275 try {
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276 outputStream.writeShort(0);
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277 outputStream.writeShort(1);
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278 outputStream.writeShort(1);
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279 } catch (IOException e) {
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280 SWT.error(SWT.ERROR_IO, e);
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281 }
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282 unloadIconHeader(image);
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283 unloadIcon(image);
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284 }
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285 /**
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286 * Unload the mask data for an icon. The data is flipped vertically
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287 * and inverted.
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288 */
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289 void unloadMaskData(ImageData icon) {
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290 ImageData mask = icon.getTransparencyMask();
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291 int bpl = (icon.width + 7) / 8;
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292 int pad = mask.scanlinePad;
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293 int srcBpl = (bpl + pad - 1) / pad * pad;
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294 int destBpl = (bpl + 3) / 4 * 4;
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295 byte[] buf = new byte[destBpl];
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296 int offset = (icon.height - 1) * srcBpl;
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297 byte[] data = mask.data;
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298 try {
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299 for (int i = 0; i < icon.height; i++) {
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300 System.arraycopy(data, offset, buf, 0, bpl);
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301 bitInvertData(buf, 0, bpl);
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302 outputStream.write(buf, 0, destBpl);
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303 offset -= srcBpl;
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304 }
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305 } catch (IOException e) {
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306 SWT.error(SWT.ERROR_IO, e);
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307 }
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308 }
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309 /**
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310 * Unload the shape data for an icon. The data is flipped vertically.
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311 */
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312 void unloadShapeData(ImageData icon) {
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313 int bpl = (icon.width * icon.depth + 7) / 8;
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314 int pad = icon.scanlinePad;
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315 int srcBpl = (bpl + pad - 1) / pad * pad;
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316 int destBpl = (bpl + 3) / 4 * 4;
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317 byte[] buf = new byte[destBpl];
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318 int offset = (icon.height - 1) * srcBpl;
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319 byte[] data = icon.data;
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320 try {
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321 for (int i = 0; i < icon.height; i++) {
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322 System.arraycopy(data, offset, buf, 0, bpl);
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323 outputStream.write(buf, 0, destBpl);
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324 offset -= srcBpl;
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325 }
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326 } catch (IOException e) {
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327 SWT.error(SWT.ERROR_IO, e);
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328 }
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329 }
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330 }
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