diff options
| author | dP <dp@dpointer.org> | 2020-02-15 01:10:04 +0300 |
|---|---|---|
| committer | Patric Stout <github@truebrain.nl> | 2020-12-20 10:13:35 +0100 |
| commit | e82333cf77861fd78ef156f97865b5f17ae38e4b (patch) | |
| tree | c9538827867332e7dc01e34abfe323ad8033c2ff /src/viewport.cpp | |
| parent | 5ca8a0bda9157ee34c12cb4360f46493dba69979 (diff) | |
| download | openttd-e82333cf77861fd78ef156f97865b5f17ae38e4b.tar.xz | |
Feature #7962: Improve rendering of large viewports
Diffstat (limited to 'src/viewport.cpp')
| -rw-r--r-- | src/viewport.cpp | 33 |
1 files changed, 6 insertions, 27 deletions
diff --git a/src/viewport.cpp b/src/viewport.cpp index 88a7d4046..e9e8d34da 100644 --- a/src/viewport.cpp +++ b/src/viewport.cpp @@ -1782,32 +1782,6 @@ void ViewportDoDraw(const Viewport *vp, int left, int top, int right, int bottom _vd.child_screen_sprites_to_draw.clear(); } -/** - * Make sure we don't draw a too big area at a time. - * If we do, the sprite memory will overflow. - */ -static void ViewportDrawChk(const Viewport *vp, int left, int top, int right, int bottom) -{ - if ((int64)ScaleByZoom(bottom - top, vp->zoom) * (int64)ScaleByZoom(right - left, vp->zoom) > (int64)(180000 * ZOOM_LVL_BASE * ZOOM_LVL_BASE)) { - if ((bottom - top) > (right - left)) { - int t = (top + bottom) >> 1; - ViewportDrawChk(vp, left, top, right, t); - ViewportDrawChk(vp, left, t, right, bottom); - } else { - int t = (left + right) >> 1; - ViewportDrawChk(vp, left, top, t, bottom); - ViewportDrawChk(vp, t, top, right, bottom); - } - } else { - ViewportDoDraw(vp, - ScaleByZoom(left - vp->left, vp->zoom) + vp->virtual_left, - ScaleByZoom(top - vp->top, vp->zoom) + vp->virtual_top, - ScaleByZoom(right - vp->left, vp->zoom) + vp->virtual_left, - ScaleByZoom(bottom - vp->top, vp->zoom) + vp->virtual_top - ); - } -} - static inline void ViewportDraw(const Viewport *vp, int left, int top, int right, int bottom) { if (right <= vp->left || bottom <= vp->top) return; @@ -1822,7 +1796,12 @@ static inline void ViewportDraw(const Viewport *vp, int left, int top, int right if (top < vp->top) top = vp->top; if (bottom > vp->top + vp->height) bottom = vp->top + vp->height; - ViewportDrawChk(vp, left, top, right, bottom); + ViewportDoDraw(vp, + ScaleByZoom(left - vp->left, vp->zoom) + vp->virtual_left, + ScaleByZoom(top - vp->top, vp->zoom) + vp->virtual_top, + ScaleByZoom(right - vp->left, vp->zoom) + vp->virtual_left, + ScaleByZoom(bottom - vp->top, vp->zoom) + vp->virtual_top + ); } /** |