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Code Issues Releases Wiki Activity

refactor invalidation of map tiles and viewports

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This commit is contained in:
IntelOrca
2015-07-06 18:57:36 +01:00
parent 9e26a6149f
commit 0def7c0883
14 changed files with 180 additions and 244 deletions
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34
src/interface/viewport.c
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@@ -2471,4 +2471,36 @@ void get_map_coordinates_from_pos(int screenX, int screenY, int flags, sint16 *x
if (x != NULL) *x = RCT2_GLOBAL(0x9AC14C, int16_t);
if (y != NULL) *y = RCT2_GLOBAL(0x9AC14E, int16_t);
if (mapElement != NULL) *mapElement = RCT2_GLOBAL(0x9AC150, rct_map_element*);
}
}
/**
* Left, top, right and bottom represent 2D map coordinates at zoom 0.
*/
void viewport_invalidate(rct_viewport *viewport, int left, int top, int right, int bottom)
{
int viewportLeft = viewport->view_x;
int viewportTop = viewport->view_y;
int viewportRight = viewport->view_x + viewport->view_width;
int viewportBottom = viewport->view_y + viewport->view_height;
if (right > viewportLeft && bottom > viewportTop) {
left = max(left, viewportLeft);
top = max(top, viewportTop);
right = min(right, viewportRight);
bottom = min(bottom, viewportBottom);
uint8 zoom = 1 << viewport->zoom;
left -= viewportLeft;
top -= viewportTop;
right -= viewportLeft;
bottom -= viewportTop;
left /= zoom;
top /= zoom;
right /= zoom;
bottom /= zoom;
left += viewport->x;
top += viewport->y;
right += viewport->x;
bottom += viewport->y;
gfx_set_dirty_blocks(left, top, right, bottom);
}
}

2
src/interface/viewport.h
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@@ -130,4 +130,6 @@ void sub_0x68615B(int ebp);
void sub_688485();
void sub_688217();
void viewport_invalidate(rct_viewport *viewport, int left, int top, int right, int bottom);
#endif