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annotate org.eclipse.swt.gtk.linux.x86/src/org/eclipse/swt/internal/image/WinBMPFileFormat.d @ 49:7a2dd761a8b2
more work until dmd 2.026 linux segfaults.
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Fri, 27 Mar 2009 12:59:54 +0100 |
| parents | ddbfe84d86df |
| children |
| rev | line source |
|---|---|
| 25 | 1 /******************************************************************************* |
| 2 * Copyright (c) 2000, 2008 IBM Corporation and others. | |
| 3 * All rights reserved. This program and the accompanying materials | |
| 4 * are made available under the terms of the Eclipse Public License v1.0 | |
| 5 * which accompanies this distribution, and is available at | |
| 6 * http://www.eclipse.org/legal/epl-v10.html | |
| 7 * | |
| 8 * Contributors: | |
| 9 * IBM Corporation - initial API and implementation | |
| 10 * Port to the D programming language: | |
| 11 * Frank Benoit <benoit@tionex.de> | |
| 12 *******************************************************************************/ | |
| 13 module org.eclipse.swt.internal.image.WinBMPFileFormat; | |
| 14 | |
| 15 import org.eclipse.swt.internal.image.FileFormat; | |
| 16 import org.eclipse.swt.graphics.PaletteData; | |
| 17 import org.eclipse.swt.graphics.Point; | |
| 18 import org.eclipse.swt.graphics.RGB; | |
| 19 import java.io.ByteArrayOutputStream; | |
| 20 import org.eclipse.swt.SWT; | |
| 21 import java.lang.all; | |
| 22 | |
| 23 | |
| 24 final class WinBMPFileFormat : FileFormat { | |
| 25 | |
|
49
7a2dd761a8b2
more work until dmd 2.026 linux segfaults.
Frank Benoit <benoit@tionex.de>
parents:
48
diff
changeset
|
26 static const int BMPFileHeaderSize = 14; |
|
7a2dd761a8b2
more work until dmd 2.026 linux segfaults.
Frank Benoit <benoit@tionex.de>
parents:
48
diff
changeset
|
27 static const int BMPHeaderFixedSize = 40; |
| 25 | 28 int importantColors; |
| 29 Point pelsPerMeter; | |
| 30 | |
| 31 public this(){ | |
| 32 pelsPerMeter = new Point(0, 0); | |
| 33 } | |
| 34 | |
| 35 /** | |
| 36 * Compress numBytes bytes of image data from src, storing in dest | |
| 37 * (starting at 0), using the technique specified by comp. | |
| 38 * If last is true, this indicates the last line of the image. | |
| 39 * Answer the size of the compressed data. | |
| 40 */ | |
| 41 int compress(int comp, byte[] src, int srcOffset, int numBytes, byte[] dest, bool last) { | |
| 42 if (comp is 1) { // BMP_RLE8_COMPRESSION | |
| 43 return compressRLE8Data(src, srcOffset, numBytes, dest, last); | |
| 44 } | |
| 45 if (comp is 2) { // BMP_RLE4_COMPRESSION | |
| 46 return compressRLE4Data(src, srcOffset, numBytes, dest, last); | |
| 47 } | |
| 48 SWT.error(SWT.ERROR_INVALID_IMAGE); | |
| 49 return 0; | |
| 50 } | |
| 51 int compressRLE4Data(byte[] src, int srcOffset, int numBytes, byte[] dest, bool last) { | |
| 52 int sp = srcOffset, end = srcOffset + numBytes, dp = 0; | |
| 53 int size = 0, left, i, n; | |
| 54 byte theByte; | |
| 55 while (sp < end) { | |
| 56 /* find two consecutive bytes that are the same in the next 128 */ | |
| 57 left = end - sp - 1; | |
| 58 if (left > 127) | |
| 59 left = 127; | |
| 60 for (n = 0; n < left; n++) { | |
| 61 if (src[sp + n] is src[sp + n + 1]) | |
| 62 break; | |
| 63 } | |
| 64 /* if there is only one more byte in the scan line, include it */ | |
| 65 if (n < 127 && n is left) | |
| 66 n++; | |
| 67 /* store the intervening data */ | |
| 68 switch (n) { | |
| 69 case 0: | |
| 70 break; | |
| 71 case 1: /* handled separately because 0,2 is a command */ | |
| 72 dest[dp] = 2; dp++; /* 1 byte is 2 pixels */ | |
| 73 dest[dp] = src[sp]; | |
| 74 dp++; sp++; | |
| 75 size += 2; | |
| 76 break; | |
| 77 default: | |
| 78 dest[dp] = 0; dp++; | |
| 79 dest[dp] = cast(byte)(n + n); dp++; /* n bytes = n*2 pixels */ | |
| 80 for (i = n; i > 0; i--) { | |
| 81 dest[dp] = src[sp]; | |
| 82 dp++; sp++; | |
| 83 } | |
| 84 size += 2 + n; | |
| 85 if ((n & 1) !is 0) { /* pad to word */ | |
| 86 dest[dp] = 0; | |
| 87 dp++; | |
| 88 size++; | |
| 89 } | |
| 90 break; | |
| 91 } | |
| 92 /* find the length of the next run (up to 127) and store it */ | |
| 93 left = end - sp; | |
| 94 if (left > 0) { | |
| 95 if (left > 127) | |
| 96 left = 127; | |
| 97 theByte = src[sp]; | |
| 98 for (n = 1; n < left; n++) { | |
| 99 if (src[sp + n] !is theByte) | |
| 100 break; | |
| 101 } | |
| 102 dest[dp] = cast(byte)(n + n); dp++; /* n bytes = n*2 pixels */ | |
| 103 dest[dp] = theByte; dp++; | |
| 104 sp += n; | |
| 105 size += 2; | |
| 106 } | |
| 107 } | |
| 108 | |
| 109 /* store the end of line or end of bitmap codes */ | |
| 110 dest[dp] = 0; dp++; | |
| 111 if (last) { | |
| 112 dest[dp] = 1; dp++; | |
| 113 } else { | |
| 114 dest[dp] = 0; dp++; | |
| 115 } | |
| 116 size += 2; | |
| 117 | |
| 118 return size; | |
| 119 } | |
| 120 int compressRLE8Data(byte[] src, int srcOffset, int numBytes, byte[] dest, bool last) { | |
| 121 int sp = srcOffset, end = srcOffset + numBytes, dp = 0; | |
| 122 int size = 0, left, i, n; | |
| 123 byte theByte; | |
| 124 while (sp < end) { | |
| 125 /* find two consecutive bytes that are the same in the next 256 */ | |
| 126 left = end - sp - 1; | |
| 127 if (left > 254) | |
| 128 left = 254; | |
| 129 for (n = 0; n < left; n++) { | |
| 130 if (src[sp + n] is src[sp + n + 1]) | |
| 131 break; | |
| 132 } | |
| 133 /* if there is only one more byte in the scan line, include it */ | |
| 134 if (n is left) | |
| 135 n++; | |
| 136 /* store the intervening data */ | |
| 137 switch (n) { | |
| 138 case 0: | |
| 139 break; | |
| 140 case 2: /* handled separately because 0,2 is a command */ | |
| 141 dest[dp] = 1; dp++; | |
| 142 dest[dp] = src[sp]; | |
| 143 dp++; sp++; | |
| 144 size += 2; | |
| 145 /* don't break, fall through */ | |
| 146 case 1: /* handled separately because 0,1 is a command */ | |
| 147 dest[dp] = 1; dp++; | |
| 148 dest[dp] = src[sp]; | |
| 149 dp++; sp++; | |
| 150 size += 2; | |
| 151 break; | |
| 152 default: | |
| 153 dest[dp] = 0; dp++; | |
| 154 dest[dp] = cast(byte)n; dp++; | |
| 155 for (i = n; i > 0; i--) { | |
| 156 dest[dp] = src[sp]; | |
| 157 dp++; sp++; | |
| 158 } | |
| 159 size += 2 + n; | |
| 160 if ((n & 1) !is 0) { /* pad to word */ | |
| 161 dest[dp] = 0; | |
| 162 dp++; | |
| 163 size++; | |
| 164 } | |
| 165 break; | |
| 166 } | |
| 167 /* find the length of the next run (up to 255) and store it */ | |
| 168 left = end - sp; | |
| 169 if (left > 0) { | |
| 170 if (left > 255) | |
| 171 left = 255; | |
| 172 theByte = src[sp]; | |
| 173 for (n = 1; n < left; n++) { | |
| 174 if (src[sp + n] !is theByte) | |
| 175 break; | |
| 176 } | |
| 177 dest[dp] = cast(byte)n; dp++; | |
| 178 dest[dp] = theByte; dp++; | |
| 179 sp += n; | |
| 180 size += 2; | |
| 181 } | |
| 182 } | |
| 183 | |
| 184 /* store the end of line or end of bitmap codes */ | |
| 185 dest[dp] = 0; dp++; | |
| 186 if (last) { | |
| 187 dest[dp] = 1; dp++; | |
| 188 } else { | |
| 189 dest[dp] = 0; dp++; | |
| 190 } | |
| 191 size += 2; | |
| 192 | |
| 193 return size; | |
| 194 } | |
| 195 void decompressData(byte[] src, byte[] dest, int stride, int cmp) { | |
| 196 if (cmp is 1) { // BMP_RLE8_COMPRESSION | |
| 197 if (decompressRLE8Data(src, src.length, stride, dest, dest.length) <= 0) | |
| 198 SWT.error(SWT.ERROR_INVALID_IMAGE); | |
| 199 return; | |
| 200 } | |
| 201 if (cmp is 2) { // BMP_RLE4_COMPRESSION | |
| 202 if (decompressRLE4Data(src, src.length, stride, dest, dest.length) <= 0) | |
| 203 SWT.error(SWT.ERROR_INVALID_IMAGE); | |
| 204 return; | |
| 205 } | |
| 206 SWT.error(SWT.ERROR_INVALID_IMAGE); | |
| 207 } | |
| 208 int decompressRLE4Data(byte[] src, int numBytes, int stride, byte[] dest, int destSize) { | |
| 209 int sp = 0; | |
| 210 int se = numBytes; | |
| 211 int dp = 0; | |
| 212 int de = destSize; | |
| 213 int x = 0, y = 0; | |
| 214 while (sp < se) { | |
| 215 int len = src[sp] & 0xFF; | |
| 216 sp++; | |
| 217 if (len is 0) { | |
| 218 len = src[sp] & 0xFF; | |
| 219 sp++; | |
| 220 switch (len) { | |
| 221 case 0: /* end of line */ | |
| 222 y++; | |
| 223 x = 0; | |
| 224 dp = y * stride; | |
| 225 if (dp > de) | |
| 226 return -1; | |
| 227 break; | |
| 228 case 1: /* end of bitmap */ | |
| 229 return 1; | |
| 230 case 2: /* delta */ | |
| 231 x += src[sp] & 0xFF; | |
| 232 sp++; | |
| 233 y += src[sp] & 0xFF; | |
| 234 sp++; | |
| 235 dp = y * stride + x / 2; | |
| 236 if (dp > de) | |
| 237 return -1; | |
| 238 break; | |
| 239 default: /* absolute mode run */ | |
| 240 if ((len & 1) !is 0) /* odd run lengths not currently supported */ | |
| 241 return -1; | |
| 242 x += len; | |
| 243 len = len / 2; | |
| 244 if (len > (se - sp)) | |
| 245 return -1; | |
| 246 if (len > (de - dp)) | |
| 247 return -1; | |
| 248 for (int i = 0; i < len; i++) { | |
| 249 dest[dp] = src[sp]; | |
| 250 dp++; | |
| 251 sp++; | |
| 252 } | |
| 253 if ((sp & 1) !is 0) | |
| 254 sp++; /* word align sp? */ | |
| 255 break; | |
| 256 } | |
| 257 } else { | |
| 258 if ((len & 1) !is 0) | |
| 259 return -1; | |
| 260 x += len; | |
| 261 len = len / 2; | |
| 262 byte theByte = src[sp]; | |
| 263 sp++; | |
| 264 if (len > (de - dp)) | |
| 265 return -1; | |
| 266 for (int i = 0; i < len; i++) { | |
| 267 dest[dp] = theByte; | |
| 268 dp++; | |
| 269 } | |
| 270 } | |
| 271 } | |
| 272 return 1; | |
| 273 } | |
| 274 int decompressRLE8Data(byte[] src, int numBytes, int stride, byte[] dest, int destSize) { | |
| 275 int sp = 0; | |
| 276 int se = numBytes; | |
| 277 int dp = 0; | |
| 278 int de = destSize; | |
| 279 int x = 0, y = 0; | |
| 280 while (sp < se) { | |
| 281 int len = src[sp] & 0xFF; | |
| 282 sp++; | |
| 283 if (len is 0) { | |
| 284 len = src[sp] & 0xFF; | |
| 285 sp++; | |
| 286 switch (len) { | |
| 287 case 0: /* end of line */ | |
| 288 y++; | |
| 289 x = 0; | |
| 290 dp = y * stride; | |
| 291 if (dp > de) | |
| 292 return -1; | |
| 293 break; | |
| 294 case 1: /* end of bitmap */ | |
| 295 return 1; | |
| 296 case 2: /* delta */ | |
| 297 x += src[sp] & 0xFF; | |
| 298 sp++; | |
| 299 y += src[sp] & 0xFF; | |
| 300 sp++; | |
| 301 dp = y * stride + x; | |
| 302 if (dp > de) | |
| 303 return -1; | |
| 304 break; | |
| 305 default: /* absolute mode run */ | |
| 306 if (len > (se - sp)) | |
| 307 return -1; | |
| 308 if (len > (de - dp)) | |
| 309 return -1; | |
| 310 for (int i = 0; i < len; i++) { | |
| 311 dest[dp] = src[sp]; | |
| 312 dp++; | |
| 313 sp++; | |
| 314 } | |
| 315 if ((sp & 1) !is 0) | |
| 316 sp++; /* word align sp? */ | |
| 317 x += len; | |
| 318 break; | |
| 319 } | |
| 320 } else { | |
| 321 byte theByte = src[sp]; | |
| 322 sp++; | |
| 323 if (len > (de - dp)) | |
| 324 return -1; | |
| 325 for (int i = 0; i < len; i++) { | |
| 326 dest[dp] = theByte; | |
| 327 dp++; | |
| 328 } | |
| 329 x += len; | |
| 330 } | |
| 331 } | |
| 332 return 1; | |
| 333 } | |
| 334 override bool isFileFormat(LEDataInputStream stream) { | |
| 335 try { | |
| 336 byte[] header = new byte[18]; | |
| 337 stream.read(header); | |
| 338 stream.unread(header); | |
| 339 int infoHeaderSize = (header[14] & 0xFF) | ((header[15] & 0xFF) << 8) | ((header[16] & 0xFF) << 16) | ((header[17] & 0xFF) << 24); | |
| 340 return header[0] is 0x42 && header[1] is 0x4D && infoHeaderSize >= BMPHeaderFixedSize; | |
| 341 } catch (Exception e) { | |
| 342 return false; | |
| 343 } | |
| 344 } | |
| 345 byte[] loadData(byte[] infoHeader) { | |
| 346 int width = (infoHeader[4] & 0xFF) | ((infoHeader[5] & 0xFF) << 8) | ((infoHeader[6] & 0xFF) << 16) | ((infoHeader[7] & 0xFF) << 24); | |
| 347 int height = (infoHeader[8] & 0xFF) | ((infoHeader[9] & 0xFF) << 8) | ((infoHeader[10] & 0xFF) << 16) | ((infoHeader[11] & 0xFF) << 24); | |
| 348 int bitCount = (infoHeader[14] & 0xFF) | ((infoHeader[15] & 0xFF) << 8); | |
| 349 int stride = (width * bitCount + 7) / 8; | |
| 350 stride = (stride + 3) / 4 * 4; // Round up to 4 byte multiple | |
| 351 byte[] data = loadData(infoHeader, stride); | |
| 352 flipScanLines(data, stride, height); | |
| 353 return data; | |
| 354 } | |
| 355 byte[] loadData(byte[] infoHeader, int stride) { | |
| 356 int height = (infoHeader[8] & 0xFF) | ((infoHeader[9] & 0xFF) << 8) | ((infoHeader[10] & 0xFF) << 16) | ((infoHeader[11] & 0xFF) << 24); | |
| 357 if (height < 0) height = -height; | |
| 358 int dataSize = height * stride; | |
| 359 byte[] data = new byte[dataSize]; | |
| 360 int cmp = (infoHeader[16] & 0xFF) | ((infoHeader[17] & 0xFF) << 8) | ((infoHeader[18] & 0xFF) << 16) | ((infoHeader[19] & 0xFF) << 24); | |
| 361 if (cmp is 0 || cmp is 3) { // BMP_NO_COMPRESSION | |
| 362 try { | |
| 363 if (inputStream.read(data) !is dataSize) | |
| 364 SWT.error(SWT.ERROR_INVALID_IMAGE); | |
| 365 } catch (IOException e) { | |
| 366 SWT.error(SWT.ERROR_IO, e); | |
| 367 } | |
| 368 } else { | |
| 369 int compressedSize = (infoHeader[20] & 0xFF) | ((infoHeader[21] & 0xFF) << 8) | ((infoHeader[22] & 0xFF) << 16) | ((infoHeader[23] & 0xFF) << 24); | |
| 370 byte[] compressed = new byte[compressedSize]; | |
| 371 try { | |
| 372 if (inputStream.read(compressed) !is compressedSize) | |
| 373 SWT.error(SWT.ERROR_INVALID_IMAGE); | |
| 374 } catch (IOException e) { | |
| 375 SWT.error(SWT.ERROR_IO, e); | |
| 376 } | |
| 377 decompressData(compressed, data, stride, cmp); | |
| 378 } | |
| 379 return data; | |
| 380 } | |
| 381 int[] loadFileHeader() { | |
| 382 int[] header = new int[5]; | |
| 383 try { | |
| 384 header[0] = inputStream.readShort(); | |
| 385 header[1] = inputStream.readInt(); | |
| 386 header[2] = inputStream.readShort(); | |
| 387 header[3] = inputStream.readShort(); | |
| 388 header[4] = inputStream.readInt(); | |
| 389 } catch (IOException e) { | |
| 390 SWT.error(SWT.ERROR_IO, e); | |
| 391 } | |
| 392 if (header[0] !is 0x4D42) | |
| 393 SWT.error(SWT.ERROR_INVALID_IMAGE); | |
| 394 return header; | |
| 395 } | |
| 396 override ImageData[] loadFromByteStream() { | |
| 397 int[] fileHeader = loadFileHeader(); | |
| 398 byte[] infoHeader = new byte[BMPHeaderFixedSize]; | |
| 399 try { | |
| 400 inputStream.read(infoHeader); | |
| 401 } catch (Exception e) { | |
| 402 SWT.error(SWT.ERROR_IO, e); | |
| 403 } | |
| 404 int width = (infoHeader[4] & 0xFF) | ((infoHeader[5] & 0xFF) << 8) | ((infoHeader[6] & 0xFF) << 16) | ((infoHeader[7] & 0xFF) << 24); | |
| 405 int height = (infoHeader[8] & 0xFF) | ((infoHeader[9] & 0xFF) << 8) | ((infoHeader[10] & 0xFF) << 16) | ((infoHeader[11] & 0xFF) << 24); | |
| 406 if (height < 0) height = -height; | |
| 407 int bitCount = (infoHeader[14] & 0xFF) | ((infoHeader[15] & 0xFF) << 8); | |
| 408 this.compression = (infoHeader[16] & 0xFF) | ((infoHeader[17] & 0xFF) << 8) | ((infoHeader[18] & 0xFF) << 16) | ((infoHeader[19] & 0xFF) << 24); | |
| 409 PaletteData palette = loadPalette(infoHeader); | |
| 410 if (inputStream.getPosition() < fileHeader[4]) { | |
| 411 // Seek to the specified offset | |
| 412 try { | |
| 413 inputStream.skip(fileHeader[4] - inputStream.getPosition()); | |
| 414 } catch (IOException e) { | |
| 415 SWT.error(SWT.ERROR_IO, e); | |
| 416 } | |
| 417 } | |
| 418 byte[] data = loadData(infoHeader); | |
| 419 this.importantColors = (infoHeader[36] & 0xFF) | ((infoHeader[37] & 0xFF) << 8) | ((infoHeader[38] & 0xFF) << 16) | ((infoHeader[39] & 0xFF) << 24); | |
| 420 int xPelsPerMeter = (infoHeader[24] & 0xFF) | ((infoHeader[25] & 0xFF) << 8) | ((infoHeader[26] & 0xFF) << 16) | ((infoHeader[27] & 0xFF) << 24); | |
| 421 int yPelsPerMeter = (infoHeader[28] & 0xFF) | ((infoHeader[29] & 0xFF) << 8) | ((infoHeader[30] & 0xFF) << 16) | ((infoHeader[31] & 0xFF) << 24); | |
| 422 this.pelsPerMeter = new Point(xPelsPerMeter, yPelsPerMeter); | |
| 423 int type = (this.compression is 1 /*BMP_RLE8_COMPRESSION*/) || (this.compression is 2 /*BMP_RLE4_COMPRESSION*/) ? SWT.IMAGE_BMP_RLE : SWT.IMAGE_BMP; | |
| 424 return [ | |
| 425 ImageData.internal_new( | |
| 426 width, | |
| 427 height, | |
| 428 bitCount, | |
| 429 palette, | |
| 430 4, | |
| 431 data, | |
| 432 0, | |
| 433 null, | |
| 434 null, | |
| 435 -1, | |
| 436 -1, | |
| 437 type, | |
| 438 0, | |
| 439 0, | |
| 440 0, | |
| 441 0) | |
| 442 ]; | |
| 443 } | |
| 444 PaletteData loadPalette(byte[] infoHeader) { | |
| 445 int depth = (infoHeader[14] & 0xFF) | ((infoHeader[15] & 0xFF) << 8); | |
| 446 if (depth <= 8) { | |
| 447 int numColors = (infoHeader[32] & 0xFF) | ((infoHeader[33] & 0xFF) << 8) | ((infoHeader[34] & 0xFF) << 16) | ((infoHeader[35] & 0xFF) << 24); | |
| 448 if (numColors is 0) { | |
| 449 numColors = 1 << depth; | |
| 450 } else { | |
| 451 if (numColors > 256) | |
| 452 numColors = 256; | |
| 453 } | |
| 454 byte[] buf = new byte[numColors * 4]; | |
| 455 try { | |
| 456 if (inputStream.read(buf) !is buf.length) | |
| 457 SWT.error(SWT.ERROR_INVALID_IMAGE); | |
| 458 } catch (IOException e) { | |
| 459 SWT.error(SWT.ERROR_IO, e); | |
| 460 } | |
| 461 return paletteFromBytes(buf, numColors); | |
| 462 } | |
| 463 if (depth is 16) { | |
| 464 if (this.compression is 3) { | |
| 465 try { | |
| 466 return new PaletteData(inputStream.readInt(), inputStream.readInt(), inputStream.readInt()); | |
| 467 } catch (IOException e) { | |
| 468 SWT.error(SWT.ERROR_IO, e); | |
| 469 } | |
| 470 } | |
| 471 return new PaletteData(0x7C00, 0x3E0, 0x1F); | |
| 472 } | |
| 473 if (depth is 24) return new PaletteData(0xFF, 0xFF00, 0xFF0000); | |
| 474 if (this.compression is 3) { | |
| 475 try { | |
| 476 return new PaletteData(inputStream.readInt(), inputStream.readInt(), inputStream.readInt()); | |
| 477 } catch (IOException e) { | |
| 478 SWT.error(SWT.ERROR_IO, e); | |
| 479 } | |
| 480 } | |
| 481 return new PaletteData(0xFF00, 0xFF0000, 0xFF000000); | |
| 482 } | |
| 483 PaletteData paletteFromBytes(byte[] bytes, int numColors) { | |
| 484 int bytesOffset = 0; | |
| 485 RGB[] colors = new RGB[numColors]; | |
| 486 for (int i = 0; i < numColors; i++) { | |
| 487 colors[i] = new RGB(bytes[bytesOffset + 2] & 0xFF, | |
| 488 bytes[bytesOffset + 1] & 0xFF, | |
| 489 bytes[bytesOffset] & 0xFF); | |
| 490 bytesOffset += 4; | |
| 491 } | |
| 492 return new PaletteData(colors); | |
| 493 } | |
| 494 /** | |
| 495 * Answer a byte array containing the BMP representation of | |
| 496 * the given device independent palette. | |
| 497 */ | |
| 498 static byte[] paletteToBytes(PaletteData pal) { | |
| 499 int n = pal.colors is null ? 0 : (pal.colors.length < 256 ? pal.colors.length : 256); | |
| 500 byte[] bytes = new byte[n * 4]; | |
| 501 int offset = 0; | |
| 502 for (int i = 0; i < n; i++) { | |
| 503 RGB col = pal.colors[i]; | |
| 504 bytes[offset] = cast(byte)col.blue; | |
| 505 bytes[offset + 1] = cast(byte)col.green; | |
| 506 bytes[offset + 2] = cast(byte)col.red; | |
| 507 offset += 4; | |
| 508 } | |
| 509 return bytes; | |
| 510 } | |
| 511 /** | |
| 512 * Unload the given image's data into the given byte stream | |
| 513 * using the given compression strategy. | |
| 514 * Answer the number of bytes written. | |
| 515 */ | |
| 516 int unloadData(ImageData image, OutputStream ostr, int comp) { | |
| 517 int totalSize = 0; | |
| 518 try { | |
| 519 if (comp is 0) | |
| 520 return unloadDataNoCompression(image, ostr); | |
| 521 int bpl = (image.width * image.depth + 7) / 8; | |
| 522 int bmpBpl = (bpl + 3) / 4 * 4; // BMP pads scanlines to multiples of 4 bytes | |
| 523 int imageBpl = image.bytesPerLine; | |
| 524 // Compression can actually take twice as much space, in worst case | |
| 525 byte[] buf = new byte[bmpBpl * 2]; | |
| 526 int srcOffset = imageBpl * (image.height - 1); // Start at last line | |
| 527 byte[] data = image.data; | |
| 528 totalSize = 0; | |
| 529 byte[] buf2 = new byte[32768]; | |
| 530 int buf2Offset = 0; | |
| 531 for (int y = image.height - 1; y >= 0; y--) { | |
| 532 int lineSize = compress(comp, data, srcOffset, bpl, buf, y is 0); | |
| 533 if (buf2Offset + lineSize > buf2.length) { | |
| 534 ostr.write(buf2, 0, buf2Offset); | |
| 535 buf2Offset = 0; | |
| 536 } | |
| 537 System.arraycopy(buf, 0, buf2, buf2Offset, lineSize); | |
| 538 buf2Offset += lineSize; | |
| 539 totalSize += lineSize; | |
| 540 srcOffset -= imageBpl; | |
| 541 } | |
| 542 if (buf2Offset > 0) | |
| 543 ostr.write(buf2, 0, buf2Offset); | |
| 544 } catch (IOException e) { | |
| 545 SWT.error(SWT.ERROR_IO, e); | |
| 546 } | |
| 547 return totalSize; | |
| 548 } | |
| 549 /** | |
| 550 * Prepare the given image's data for unloading into a byte stream | |
| 551 * using no compression strategy. | |
| 552 * Answer the number of bytes written. | |
| 553 */ | |
| 554 int unloadDataNoCompression(ImageData image, OutputStream ostr) { | |
| 555 int bmpBpl = 0; | |
| 556 try { | |
| 557 int bpl = (image.width * image.depth + 7) / 8; | |
| 558 bmpBpl = (bpl + 3) / 4 * 4; // BMP pads scanlines to multiples of 4 bytes | |
| 559 int linesPerBuf = 32678 / bmpBpl; | |
| 560 byte[] buf = new byte[linesPerBuf * bmpBpl]; | |
| 561 byte[] data = image.data; | |
| 562 int imageBpl = image.bytesPerLine; | |
| 563 int dataIndex = imageBpl * (image.height - 1); // Start at last line | |
| 564 if (image.depth is 16) { | |
| 565 for (int y = 0; y < image.height; y += linesPerBuf) { | |
| 566 int count = image.height - y; | |
| 567 if (linesPerBuf < count) count = linesPerBuf; | |
| 568 int bufOffset = 0; | |
| 569 for (int i = 0; i < count; i++) { | |
| 570 for (int wIndex = 0; wIndex < bpl; wIndex += 2) { | |
| 571 buf[bufOffset + wIndex + 1] = data[dataIndex + wIndex + 1]; | |
| 572 buf[bufOffset + wIndex] = data[dataIndex + wIndex]; | |
| 573 } | |
| 574 bufOffset += bmpBpl; | |
| 575 dataIndex -= imageBpl; | |
| 576 } | |
| 577 ostr.write(buf, 0, bufOffset); | |
| 578 } | |
| 579 } else { | |
| 580 for (int y = 0; y < image.height; y += linesPerBuf) { | |
| 581 int tmp = image.height - y; | |
| 582 int count = tmp < linesPerBuf ? tmp : linesPerBuf; | |
| 583 int bufOffset = 0; | |
| 584 for (int i = 0; i < count; i++) { | |
| 585 System.arraycopy(data, dataIndex, buf, bufOffset, bpl); | |
| 586 bufOffset += bmpBpl; | |
| 587 dataIndex -= imageBpl; | |
| 588 } | |
| 589 ostr.write(buf, 0, bufOffset); | |
| 590 } | |
| 591 } | |
| 592 } catch (IOException e) { | |
| 593 SWT.error(SWT.ERROR_IO, e); | |
| 594 } | |
| 595 return bmpBpl * image.height; | |
| 596 } | |
| 597 /** | |
| 598 * Unload a DeviceIndependentImage using Windows .BMP format into the given | |
| 599 * byte stream. | |
| 600 */ | |
| 601 override void unloadIntoByteStream(ImageLoader loader) { | |
| 602 ImageData image = loader.data[0]; | |
| 603 byte[] rgbs; | |
| 604 int numCols; | |
| 605 if (!((image.depth is 1) || (image.depth is 4) || (image.depth is 8) || | |
| 606 (image.depth is 16) || (image.depth is 24) || (image.depth is 32))) | |
| 607 SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH); | |
| 608 int comp = this.compression; | |
| 609 if (!((comp is 0) || ((comp is 1) && (image.depth is 8)) || | |
| 610 ((comp is 2) && (image.depth is 4)))) | |
| 611 SWT.error(SWT.ERROR_INVALID_IMAGE); | |
| 612 PaletteData pal = image.palette; | |
| 613 if ((image.depth is 16) || (image.depth is 24) || (image.depth is 32)) { | |
| 614 if (!pal.isDirect) | |
| 615 SWT.error(SWT.ERROR_INVALID_IMAGE); | |
| 616 numCols = 0; | |
| 617 rgbs = null; | |
| 618 } else { | |
| 619 if (pal.isDirect) | |
| 620 SWT.error(SWT.ERROR_INVALID_IMAGE); | |
| 621 numCols = pal.colors.length; | |
| 622 rgbs = paletteToBytes(pal); | |
| 623 } | |
| 624 // Fill in file header, except for bfsize, which is done later. | |
| 625 int headersSize = BMPFileHeaderSize + BMPHeaderFixedSize; | |
| 626 int[] fileHeader = new int[5]; | |
| 627 fileHeader[0] = 0x4D42; // Signature | |
| 628 fileHeader[1] = 0; // File size - filled in later | |
| 629 fileHeader[2] = 0; // Reserved 1 | |
| 630 fileHeader[3] = 0; // Reserved 2 | |
| 631 fileHeader[4] = headersSize; // Offset to data | |
| 632 if (rgbs !is null) { | |
| 633 fileHeader[4] += rgbs.length; | |
| 634 } | |
| 635 | |
| 636 // Prepare data. This is done first so we don't have to try to rewind | |
| 637 // the stream and fill in the details later. | |
| 638 ByteArrayOutputStream ostr = new ByteArrayOutputStream(); | |
| 639 unloadData(image, ostr, comp); | |
| 640 byte[] data = ostr.toByteArray(); | |
| 641 | |
| 642 // Calculate file size | |
| 643 fileHeader[1] = fileHeader[4] + data.length; | |
| 644 | |
| 645 // Write the headers | |
| 646 try { | |
| 647 outputStream.writeShort(fileHeader[0]); | |
| 648 outputStream.writeInt(fileHeader[1]); | |
| 649 outputStream.writeShort(fileHeader[2]); | |
| 650 outputStream.writeShort(fileHeader[3]); | |
| 651 outputStream.writeInt(fileHeader[4]); | |
| 652 } catch (IOException e) { | |
| 653 SWT.error(SWT.ERROR_IO, e); | |
| 654 } | |
| 655 try { | |
| 656 outputStream.writeInt(BMPHeaderFixedSize); | |
| 657 outputStream.writeInt(image.width); | |
| 658 outputStream.writeInt(image.height); | |
| 659 outputStream.writeShort(1); | |
| 660 outputStream.writeShort(cast(short)image.depth); | |
| 661 outputStream.writeInt(comp); | |
| 662 outputStream.writeInt(data.length); | |
| 663 outputStream.writeInt(pelsPerMeter.x); | |
| 664 outputStream.writeInt(pelsPerMeter.y); | |
| 665 outputStream.writeInt(numCols); | |
| 666 outputStream.writeInt(importantColors); | |
| 667 } catch (IOException e) { | |
| 668 SWT.error(SWT.ERROR_IO, e); | |
| 669 } | |
| 670 | |
| 671 // Unload palette | |
| 672 if (numCols > 0) { | |
| 673 try { | |
| 674 outputStream.write(rgbs); | |
| 675 } catch (IOException e) { | |
| 676 SWT.error(SWT.ERROR_IO, e); | |
| 677 } | |
| 678 } | |
| 679 | |
| 680 // Unload the data | |
| 681 try { | |
| 682 outputStream.write(data); | |
| 683 } catch (IOException e) { | |
| 684 SWT.error(SWT.ERROR_IO, e); | |
| 685 } | |
| 686 } | |
| 687 void flipScanLines(byte[] data, int stride, int height) { | |
| 688 int i1 = 0; | |
| 689 int i2 = (height - 1) * stride; | |
| 690 for (int i = 0; i < height / 2; i++) { | |
| 691 for (int index = 0; index < stride; index++) { | |
| 692 byte b = data[index + i1]; | |
| 693 data[index + i1] = data[index + i2]; | |
| 694 data[index + i2] = b; | |
| 695 } | |
| 696 i1 += stride; | |
| 697 i2 -= stride; | |
| 698 } | |
| 699 } | |
| 700 | |
| 701 } |