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d180f4d9b3
The new struct rect_union is designed to make it easier to efficiently accumulate a list of rectangles, and then operate on an exact cover of their union. Using rect_union, the times needed to added t rectangles, and then compute their exact cover will be O(t), and something between Ω(t) and O(t^2), depending on the rectangle arrangement. If one tries to do the same by storing a pixman_region32_t and updating it with pixman_region32_union_rect(), then total time needed would be between Ω(t^2) and O(t^3), depending on the input. Without changing the public API (data structure + rectangle ordering rules) for pixman_region32_t, it is impossible to improve its worst case time. |
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| .. | ||
| addon.c | ||
| array.c | ||
| box.c | ||
| env.c | ||
| global.c | ||
| log.c | ||
| meson.build | ||
| rect_union.c | ||
| region.c | ||
| set.c | ||
| shm.c | ||
| time.c | ||
| token.c | ||