| 1339 | } |
| 1340 | |
| 1341 | static void WriteChannelInfo(std::vector<unsigned char> &data, |
| 1342 | const std::vector<ChannelInfo> &channels) { |
| 1343 | size_t sz = 0; |
| 1344 | |
| 1345 | // Calculate total size. |
| 1346 | for (size_t c = 0; c < channels.size(); c++) { |
| 1347 | sz += channels[c].name.length() + 1; // +1 for \0 |
| 1348 | sz += 16; // 4 * int |
| 1349 | } |
| 1350 | data.resize(sz + 1); |
| 1351 | |
| 1352 | unsigned char *p = &data.at(0); |
| 1353 | |
| 1354 | for (size_t c = 0; c < channels.size(); c++) { |
| 1355 | memcpy(p, channels[c].name.c_str(), channels[c].name.length()); |
| 1356 | p += channels[c].name.length(); |
| 1357 | (*p) = '\0'; |
| 1358 | p++; |
| 1359 | |
| 1360 | int pixel_type = channels[c].requested_pixel_type; |
| 1361 | int x_sampling = channels[c].x_sampling; |
| 1362 | int y_sampling = channels[c].y_sampling; |
| 1363 | tinyexr::swap4(&pixel_type); |
| 1364 | tinyexr::swap4(&x_sampling); |
| 1365 | tinyexr::swap4(&y_sampling); |
| 1366 | |
| 1367 | memcpy(p, &pixel_type, sizeof(int)); |
| 1368 | p += sizeof(int); |
| 1369 | |
| 1370 | (*p) = channels[c].p_linear; |
| 1371 | p += 4; |
| 1372 | |
| 1373 | memcpy(p, &x_sampling, sizeof(int)); |
| 1374 | p += sizeof(int); |
| 1375 | |
| 1376 | memcpy(p, &y_sampling, sizeof(int)); |
| 1377 | p += sizeof(int); |
| 1378 | } |
| 1379 | |
| 1380 | (*p) = '\0'; |
| 1381 | } |
| 1382 | |
| 1383 | static bool CompressZip(unsigned char *dst, |
| 1384 | tinyexr::tinyexr_uint64 &compressedSize, |