| 261 | } |
| 262 | |
| 263 | void ReadScanline(ILubyte *scanline, ILuint w) { |
| 264 | ILubyte *runner; |
| 265 | ILuint r, g, b, e, read, shift; |
| 266 | |
| 267 | r = igetc(); |
| 268 | g = igetc(); |
| 269 | b = igetc(); |
| 270 | e = igetc(); |
| 271 | |
| 272 | //check if the scanline is in the new format |
| 273 | //if so, e, r, g, g are stored separated and are |
| 274 | //rle-compressed independently. |
| 275 | if (r == 2 && g == 2) { |
| 276 | ILuint length = (b << 8) | e; |
| 277 | ILuint j, t, k; |
| 278 | if (length > w) |
| 279 | length = w; //fix broken files |
| 280 | for (k = 0; k < 4; ++k) { |
| 281 | runner = scanline + k; |
| 282 | j = 0; |
| 283 | while (j < length) { |
| 284 | t = igetc(); |
| 285 | if (t > 128) { //Run? |
| 286 | ILubyte val = igetc(); |
| 287 | t &= 127; |
| 288 | //copy current byte |
| 289 | while (t > 0 && j < length) { |
| 290 | *runner = val; |
| 291 | runner += 4; |
| 292 | --t; |
| 293 | ++j; |
| 294 | } |
| 295 | } |
| 296 | else { //No Run. |
| 297 | //read new bytes |
| 298 | while (t > 0 && j < length) { |
| 299 | *runner = igetc(); |
| 300 | runner += 4; |
| 301 | --t; |
| 302 | ++j; |
| 303 | } |
| 304 | } |
| 305 | } |
| 306 | } |
| 307 | return; //done decoding a scanline in separated format |
| 308 | } |
| 309 | |
| 310 | //if we come here, we are dealing with old-style scanlines |
| 311 | shift = 0; |
| 312 | read = 0; |
| 313 | runner = scanline; |
| 314 | while (read < w) { |
| 315 | if (read != 0) { |
| 316 | r = igetc(); |
| 317 | g = igetc(); |
| 318 | b = igetc(); |
| 319 | e = igetc(); |
| 320 | } |