trunk/src/emu/bus/isa/trident.c
| r32589 | r32590 | |
|---|
| 1487 | 1487 | // TGUI_SRC_XY(dmin-dmaj,dmin); |
| 1488 | 1488 | // TGUI_DEST_XY(x,y); |
| 1489 | 1489 | // TGUI_DIM_XY(dmin+e,len); |
| 1490 | | INT16 dx = abs(tri.accel_source_x - tri.accel_source_y); |
| 1491 | | INT16 dy = abs(tri.accel_source_y); |
| 1492 | | INT16 err = (tri.accel_dim_x - tri.accel_source_y); |
| 1490 | INT16 dx = tri.accel_source_y - tri.accel_source_x; |
| 1491 | INT16 dy = tri.accel_source_y; |
| 1492 | INT16 err = tri.accel_dim_x + tri.accel_source_y; |
| 1493 | 1493 | int sx = (tri.accel_drawflags & 0x0200) ? -1 : 1; |
| 1494 | 1494 | int sy = (tri.accel_drawflags & 0x0100) ? -1 : 1; |
| 1495 | | int count = 0; |
| 1496 | | INT16 temp; |
| 1495 | int x,y,z; |
| 1497 | 1496 | |
| 1498 | | if(tri.accel_drawflags & 0x0400) |
| 1497 | x = tri.accel_dest_x; |
| 1498 | y = tri.accel_dest_y; |
| 1499 | |
| 1500 | WRITEPIXEL(x,y,col); |
| 1501 | for(z=0;z<tri.accel_dim_y;z++) |
| 1499 | 1502 | { |
| 1500 | | temp = dx; dx = dy; dy = temp; |
| 1501 | | } |
| 1502 | | for(;;) |
| 1503 | | { |
| 1504 | | WRITEPIXEL(tri.accel_dest_x,tri.accel_dest_y,col); |
| 1505 | | if (count > tri.accel_dim_y) break; |
| 1506 | | count++; |
| 1507 | | if((err*2) > -dy) |
| 1503 | if(tri.accel_drawflags & 0x0400) |
| 1504 | y += sy; |
| 1505 | else |
| 1506 | x += sx; |
| 1507 | if(err > 0) |
| 1508 | 1508 | { |
| 1509 | | err -= dy; |
| 1510 | | tri.accel_dest_x += sx; |
| 1509 | if(tri.accel_drawflags & 0x0400) |
| 1510 | x += sx; |
| 1511 | else |
| 1512 | y += sy; |
| 1513 | WRITEPIXEL(x,y,col); |
| 1514 | err += (dy-dx); |
| 1511 | 1515 | } |
| 1512 | | if((err*2) < dx) |
| 1516 | else |
| 1513 | 1517 | { |
| 1514 | | err += dx; |
| 1515 | | tri.accel_dest_y += sy; |
| 1518 | WRITEPIXEL(x,y,col); |
| 1519 | err += dy; |
| 1516 | 1520 | } |
| 1517 | 1521 | } |
| 1518 | 1522 | } |