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comparison tools/lib64gfx.c @ 2345:fe025c461760

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Move pixel helper functions from being inline in lib64gfx.h to lib64gfx.c
author Matti Hamalainen <ccr@tnsp.org>
date Tue, 08 Oct 2019 14:49:00 +0300
parents 13e54305e5fc
children 82cb32297ed2
comparison
equal deleted inserted replaced
2344:13e54305e5fc 2345:fe025c461760
1328 err: 1328 err:
1329 return res; 1329 return res;
1330 } 1330 }
1331 1331
1332 1332
1333 //
1334 // Helper functions for pixel format decoding
1335 //
1336 int dmC64GetGenericSCPixel(Uint8 *col,
1337 const DMC64Image *img, const int bmoffs, const int scroffs,
1338 const int vshift, const int vbank, const int bitmap)
1339 {
1340 if ((img->bitmap[bitmap].data[bmoffs] >> vshift) & 1)
1341 *col = img->screen[vbank].data[scroffs] >> 4;
1342 else
1343 *col = img->screen[vbank].data[scroffs] & 15;
1344
1345 return DMERR_OK;
1346 }
1347
1348
1349 int dmC64GetGenericMCPixel(Uint8 *col,
1350 const DMC64Image *img, const int bmoffs, const int scroffs,
1351 const int vshift, const int vbank, const int bitmap,
1352 const int cbank, const int bgcolor)
1353 {
1354 switch ((img->bitmap[bitmap].data[bmoffs] >> vshift) & 3)
1355 {
1356 case 0: *col = bgcolor & 15; break;
1357 case 1: *col = img->screen[vbank].data[scroffs] >> 4; break;
1358 case 2: *col = img->screen[vbank].data[scroffs] & 15; break;
1359 default: *col = img->color[cbank].data[scroffs] & 15; break;
1360 }
1361
1362 return DMERR_OK;
1363 }
1364
1365
1366 int dmC64GetGenericCharSCPixel(Uint8 *col,
1367 const DMC64Image *img, const int scroffs, const int rasterX,
1368 const int chrbank, const size_t chroffs, const int chr,
1369 const int cbank, const int bgcolor)
1370 {
1371 if (chroffs >= img->charData[chrbank].size)
1372 {
1373 return dmError(DMERR_INVALID_DATA,
1374 "Character map index #%d out of bounds for char ROM data.\n",
1375 chr);
1376 }
1377
1378 const int vshift = 7 - (rasterX & 7);
1379 if ((img->charData[chrbank].data[chroffs] >> vshift) & 1)
1380 *col = img->color[cbank].data[scroffs] & 15;
1381 else
1382 *col = bgcolor & 15;
1383
1384 return DMERR_OK;
1385 }
1386
1387
1388 int dmC64GetGenericCharMCPixel(Uint8 *col,
1389 const DMC64Image *img, const int scroffs, const int rasterX,
1390 const int chrbank, const size_t chroffs, const int chr,
1391 const int cbank, const int bgcolor,
1392 const int bgd022, const int bgd023)
1393 {
1394 if (chroffs >= img->charData[chrbank].size)
1395 {
1396 return dmError(DMERR_INVALID_DATA,
1397 "Character map index #%d out of bounds for char ROM data.\n",
1398 chr);
1399 }
1400
1401 const int ccol = img->color[cbank].data[scroffs];
1402 if (ccol & 8)
1403 {
1404 const int vshift = 6 - (rasterX & 6);
1405 switch ((img->charData[chrbank].data[chroffs] >> vshift) & 3)
1406 {
1407 case 0: *col = bgcolor & 15; break;
1408 case 1: *col = bgd022 & 15; break;
1409 case 2: *col = bgd023 & 15; break;
1410 case 3: *col = ccol & 7;
1411 }
1412 }
1413 else
1414 {
1415 const int vshift = 7 - (rasterX & 7);
1416 if ((img->charData[chrbank].data[chroffs] >> vshift) & 1)
1417 *col = ccol & 7;
1418 else
1419 *col = bgcolor & 15;
1420 }
1421
1422 return DMERR_OK;
1423 }
1424
1425
1426 int dmC64GetGenericCharECMPixel(Uint8 *col,
1427 const DMC64Image *img, const int scroffs, const int rasterX,
1428 const int chrbank, const size_t chroffs, const int chr,
1429 const int cbank, const int bgcolor,
1430 const int bgd022, const int bgd023, const int bgd024)
1431 {
1432 if (chroffs >= img->charData[0].size)
1433 {
1434 return dmError(DMERR_INVALID_DATA,
1435 "Character map index #%d out of bounds for char ROM data.\n",
1436 chr);
1437 }
1438
1439 const int vshift = 7 - (rasterX & 7);
1440 if ((img->charData[chrbank].data[chroffs] >> vshift) & 1)
1441 *col = img->color[cbank].data[scroffs] & 15;
1442 else
1443 switch ((chr >> 6) & 3)
1444 {
1445 case 0: *col = bgcolor & 15; break;
1446 case 1: *col = bgd022 & 15; break;
1447 case 2: *col = bgd023 & 15; break;
1448 case 3: *col = bgd024 & 15; break;
1449 }
1450
1451 return DMERR_OK;
1452 }
1453
1454
1333 static int fmtGetGenericSCPixel(DMC64ScanLine *scan, 1455 static int fmtGetGenericSCPixel(DMC64ScanLine *scan,
1334 const DMC64Image *img, const int rasterX, const int rasterY) 1456 const DMC64Image *img, const int rasterX, const int rasterY)
1335 { 1457 {
1336 DM_C64_GENERIC_SC_PIXEL_DEFS(img) 1458 DM_C64_GENERIC_SC_PIXEL_DEFS(img)
1337 1459