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@ r26799:826b1c52a903
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Location: cpp/openttd-patchpack/source/src/video/video_driver.cpp
r26799:826b1c52a903
5.3 KiB
text/x-c
Fix: no ScriptEvent sub class should export constructors to scripts
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 | /*
* 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 video_driver.cpp Common code between video driver implementations. */
#include "../stdafx.h"
#include "../core/random_func.hpp"
#include "../network/network.h"
#include "../blitter/factory.hpp"
#include "../debug.h"
#include "../fontcache.h"
#include "../gfx_func.h"
#include "../gfxinit.h"
#include "../progress.h"
#include "../thread.h"
#include "../window_func.h"
#include "video_driver.hpp"
bool _video_hw_accel; ///< Whether to consider hardware accelerated video drivers.
bool _video_vsync; ///< Whether we should use vsync (only if _video_hw_accel is enabled).
void VideoDriver::GameLoop()
{
this->next_game_tick += this->GetGameInterval();
/* Avoid next_game_tick getting behind more and more if it cannot keep up. */
auto now = std::chrono::steady_clock::now();
if (this->next_game_tick < now - ALLOWED_DRIFT * this->GetGameInterval()) this->next_game_tick = now;
{
std::lock_guard<std::mutex> lock(this->game_state_mutex);
::GameLoop();
}
}
void VideoDriver::GameThread()
{
while (!_exit_game) {
this->GameLoop();
auto now = std::chrono::steady_clock::now();
if (this->next_game_tick > now) {
std::this_thread::sleep_for(this->next_game_tick - now);
} else {
/* Ensure we yield this thread if drawings wants to take a lock on
* the game state. This is mainly because most OSes have an
* optimization that if you unlock/lock a mutex in the same thread
* quickly, it will never context switch even if there is another
* thread waiting to take the lock on the same mutex. */
std::lock_guard<std::mutex> lock(this->game_thread_wait_mutex);
}
}
}
/**
* Pause the game-loop for a bit, releasing the game-state lock. This allows,
* if the draw-tick requested this, the drawing to happen.
*/
void VideoDriver::GameLoopPause()
{
/* If we are not called from the game-thread, ignore this request. */
if (std::this_thread::get_id() != this->game_thread.get_id()) return;
this->game_state_mutex.unlock();
{
/* See GameThread() for more details on this lock. */
std::lock_guard<std::mutex> lock(this->game_thread_wait_mutex);
}
this->game_state_mutex.lock();
}
/* static */ void VideoDriver::GameThreadThunk(VideoDriver *drv)
{
drv->GameThread();
}
void VideoDriver::StartGameThread()
{
if (this->is_game_threaded) {
this->is_game_threaded = StartNewThread(&this->game_thread, "ottd:game", &VideoDriver::GameThreadThunk, this);
}
Debug(driver, 1, "using {}thread for game-loop", this->is_game_threaded ? "" : "no ");
}
void VideoDriver::StopGameThread()
{
if (!this->is_game_threaded) return;
this->game_thread.join();
}
void VideoDriver::Tick()
{
if (!this->is_game_threaded && std::chrono::steady_clock::now() >= this->next_game_tick) {
this->GameLoop();
/* For things like dedicated server, don't run a separate draw-tick. */
if (!this->HasGUI()) {
::InputLoop();
::UpdateWindows();
this->next_draw_tick = this->next_game_tick;
}
}
auto now = std::chrono::steady_clock::now();
if (this->HasGUI() && now >= this->next_draw_tick) {
this->next_draw_tick += this->GetDrawInterval();
/* Avoid next_draw_tick getting behind more and more if it cannot keep up. */
if (this->next_draw_tick < now - ALLOWED_DRIFT * this->GetDrawInterval()) this->next_draw_tick = now;
/* Locking video buffer can block (especially with vsync enabled), do it before taking game state lock. */
this->LockVideoBuffer();
{
/* Tell the game-thread to stop so we can have a go. */
std::lock_guard<std::mutex> lock_wait(this->game_thread_wait_mutex);
std::lock_guard<std::mutex> lock_state(this->game_state_mutex);
/* Keep the interactive randomizer a bit more random by requesting
* new values when-ever we can. */
InteractiveRandom();
this->DrainCommandQueue();
while (this->PollEvent()) {}
this->InputLoop();
/* Check if the fast-forward button is still pressed. */
if (fast_forward_key_pressed && !_networking && _game_mode != GM_MENU) {
ChangeGameSpeed(true);
this->fast_forward_via_key = true;
} else if (this->fast_forward_via_key) {
ChangeGameSpeed(false);
this->fast_forward_via_key = false;
}
::InputLoop();
/* Prevent drawing when switching mode, as windows can be removed when they should still appear. */
if (_game_mode == GM_BOOTSTRAP || _switch_mode == SM_NONE || HasModalProgress()) {
::UpdateWindows();
}
this->PopulateSystemSprites();
}
this->CheckPaletteAnim();
this->Paint();
this->UnlockVideoBuffer();
}
}
void VideoDriver::SleepTillNextTick()
{
auto next_tick = this->next_draw_tick;
auto now = std::chrono::steady_clock::now();
if (!this->is_game_threaded) {
next_tick = min(next_tick, this->next_game_tick);
}
if (next_tick > now) {
std::this_thread::sleep_for(next_tick - now);
}
}
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