mirror of
https://github.com/JGRennison/OpenTTD-patches.git
synced 2024-11-17 21:25:40 +00:00
8e0d48a0f6
When there are a lot of rects to redraw, of which one of the last ones is almost the full screen, visual tearing happens over the vertical axis. This is most visible when scrolling the map. This can be prevented by using less rects. To simplify the situation, and as solutions like OpenGL need this anyway, keep a single rect that shows the biggest size that updates everything correctly. Although this means it needs a bit more time redrawing where it is strictly seen not needed, it also means less commands have to be executed in the backend. In the end, this is a trade-off, and from experiments it seems the approach of this commit gives a better result.
30 lines
1.1 KiB
C++
30 lines
1.1 KiB
C++
/*
|
|
* This file is part of OpenTTD.
|
|
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
|
|
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/** @file geometry_func.hpp Geometry functions. */
|
|
|
|
#ifndef GEOMETRY_FUNC_HPP
|
|
#define GEOMETRY_FUNC_HPP
|
|
|
|
#include "geometry_type.hpp"
|
|
|
|
Dimension maxdim(const Dimension &d1, const Dimension &d2);
|
|
|
|
/**
|
|
* Check if a rectangle is empty.
|
|
* @param r Rectangle to check.
|
|
* @return True if and only if the rectangle doesn't define space.
|
|
*/
|
|
static inline bool IsEmptyRect(const Rect &r)
|
|
{
|
|
return (r.left | r.top | r.right | r.bottom) == 0;
|
|
}
|
|
|
|
Rect BoundingRect(const Rect &r1, const Rect &r2);
|
|
|
|
#endif /* GEOMETRY_FUNC_HPP */
|