2a3a7ab5a7
screen bitmap and within a single MEMBUF were broken when first source line is before the first destination line and the sub-bitmaps overlap. The fix just copies horizontal lines in reverse order when the first source line is before the first destination line. This switches directions unnecessarily in some cases, but the switch is about as fast as doing a precise detection of overlaps. When the first lines are the same, there can be undetected overlap in the horizontal direction. The old code already handles this mostly accidentally by using bcopy() for MEMBUFs and by copying through a temporary buffer for the screen bitmap although the latter is sub-optimal in direct modes. |
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| .. | ||
| bitmap.c | ||
| keyboard.c | ||
| main.c | ||
| Makefile | ||
| Makefile.depend | ||
| mouse.c | ||
| simple.c | ||
| text.c | ||
| vgl.3 | ||
| vgl.h | ||