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annotate src/timer/beos/SDL_systimer.c @ 1675:d33dcfc3fde7 SDL-1.3

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Overlay functions are being replaced by YUV textures. If the driver doesn't support YUV textures, they can be emulated by backing the texture with an RGB texture and using the software conversion routines. Note that it doesn't make sense to lock a portion of a YV12 texture, since you'd need to return three pixel pointers and pitch values instead of the one that's available through the API. I'm guessing that's one of the reasons DirectX 9 doesn't support this format at all.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 11 Jun 2006 07:30:16 +0000
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #ifdef SDL_TIMER_BEOS
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25
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26 #include <be/kernel/OS.h>
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27
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28 #include "SDL_thread.h"
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29 #include "SDL_timer.h"
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30 #include "../SDL_timer_c.h"
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31
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32 static bigtime_t start;
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33
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34 void
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35 SDL_StartTicks(void)
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36 {
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37 /* Set first ticks value */
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38 start = system_time();
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39 }
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40
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41 Uint32
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42 SDL_GetTicks(void)
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43 {
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44 return ((system_time() - start) / 1000);
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45 }
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46
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47 void
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48 SDL_Delay(Uint32 ms)
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49 {
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50 snooze(ms * 1000);
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51 }
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52
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53 /* Data to handle a single periodic alarm */
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54 static int timer_alive = 0;
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55 static SDL_Thread *timer = NULL;
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56
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57 static int
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58 RunTimer(void *unused)
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59 {
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60 while (timer_alive) {
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61 if (SDL_timer_running) {
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62 SDL_ThreadedTimerCheck();
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63 }
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64 SDL_Delay(10);
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65 }
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66 return (0);
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67 }
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68
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69 /* This is only called if the event thread is not running */
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70 int
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71 SDL_SYS_TimerInit(void)
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72 {
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73 timer_alive = 1;
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74 timer = SDL_CreateThread(RunTimer, NULL);
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75 if (timer == NULL)
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76 return (-1);
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77 return (SDL_SetTimerThreaded(1));
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78 }
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79
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80 void
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81 SDL_SYS_TimerQuit(void)
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82 {
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83 timer_alive = 0;
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84 if (timer) {
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85 SDL_WaitThread(timer, NULL);
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86 timer = NULL;
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87 }
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88 }
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89
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90 int
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91 SDL_SYS_StartTimer(void)
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92 {
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93 SDL_SetError("Internal logic error: BeOS uses threaded timer");
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94 return (-1);
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95 }
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96
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97 void
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98 SDL_SYS_StopTimer(void)
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99 {
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100 return;
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101 }
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102
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103 #endif /* SDL_TIMER_BEOS */
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104 /* vi: set ts=4 sw=4 expandtab: */