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annotate src/timer/amigaos/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
parents 4da1ee79c9af
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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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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_AMIGA
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25
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26 #include <stdio.h>
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27 #include <time.h>
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28 #include <signal.h>
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29 #include <unistd.h>
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30 #include <string.h>
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31 #include <errno.h>
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32 #include <exec/types.h>
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33 #ifdef __SASC
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34 #include <proto/dos.h>
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35 #include <clib/graphics_protos.h>
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36 #include <pragmas/graphics.h>
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37 #include <clib/exec_protos.h>
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38 #include <pragmas/exec.h>
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39 #elif defined(STORMC4_WOS)
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40 #include <proto/dos.h>
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41 #include <proto/exec.h>
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42 #include <proto/graphics.h>
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43 #else
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44 #include <inline/dos.h>
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45 #include <inline/exec.h>
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46 #include <inline/graphics.h>
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47 #endif
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48 #include "mydebug.h"
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49
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50 extern struct DosLibrary *DOSBase;
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51 extern struct ExecBase *SysBase;
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52 static struct GfxBase *GfxBase;
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53
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54 #include "SDL_timer.h"
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55 #include "../SDL_timer_c.h"
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56
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57 /* The first ticks value of the application */
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58
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59 #if !defined(__PPC__) || defined(STORMC4_WOS) || defined(MORPHOS)
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60 static clock_t start;
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61
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62 void
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63 SDL_StartTicks(void)
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64 {
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65 /* Set first ticks value */
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66 start = clock();
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67 }
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68
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69 Uint32
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70 SDL_GetTicks(void)
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71 {
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72 clock_t ticks;
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73
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74 ticks = clock() - start;
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75
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76 #ifdef __SASC
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77 // CLOCKS_PER_SEC == 1000 !
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78
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79 return (ticks);
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80 #else
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81 // CLOCKS_PER_SEC != 1000 !
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82
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83 return ticks * (1000 / CLOCKS_PER_SEC);
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84 #endif
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85 }
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86
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87 void
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88 SDL_Delay(Uint32 ms)
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89 {
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90 // Do a busy wait if time is less than 50ms
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91
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92 if (ms < 50) {
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93 clock_t to_wait = clock();
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94
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95 #ifndef __SASC
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96 ms *= (CLOCKS_PER_SEC / 1000);
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97 #endif
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98 to_wait += ms;
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99
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100 while (clock() < to_wait);
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101 } else {
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102 Delay(ms / 20);
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103 }
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104 }
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105
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106 #else
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107
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108 ULONG MY_CLOCKS_PER_SEC;
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109
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110 void PPC_TimerInit(void);
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111 APTR MyTimer;
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112
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113 ULONG start[2];
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114
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115 void
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116 SDL_StartTicks(void)
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117 {
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118 /* Set first ticks value */
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119 if (!MyTimer)
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120 PPC_TimerInit();
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121
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122 PPCGetTimerObject(MyTimer, PPCTIMERTAG_CURRENTTICKS, start);
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123 start[1] >>= 10;
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124 start[1] |= ((result[0] & 0x3ff) << 22);
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125 start[0] >>= 10;
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126 }
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127
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128 Uint32
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129 SDL_GetTicks(void)
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130 {
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131 ULONG result[2];
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132 PPCGetTimerObject(MyTimer, PPCTIMERTAG_CURRENTTICKS, result);
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133
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134 // PPCAsr64p(result,10);
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135 // Non va, la emulo:
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136
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137 result[1] >>= 10;
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138 result[1] |= ((result[0] & 0x3ff) << 22);
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139
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140 // Non mi interessa piu' result[0]
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141
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142 return result[1] * 1000 / MY_CLOCKS_PER_SEC;
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143 }
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144
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145 void
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146 SDL_Delay(Uint32 ms)
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147 {
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148 // Do a busy wait if time is less than 50ms
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149
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150 if (ms < 50) {
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151 ULONG to_wait[2], actual[2];
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152 PPCGetTimerObject(MyTimer, PPCTIMERTAG_CURRENTTICKS, result);
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153 actual[1] = 0;
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154 to_wait[1] += ms * 1000 / MY_CLOCKS_PER_SEC;
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155
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156 while (actual[1] < to_wait[1]) {
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157 PPCGetTimerObject(MyTimer, PPCTIMERTAG_CURRENTTICKS, actual);
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158 }
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159 } else {
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160 Delay(ms / 50);
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161 }
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162 }
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163
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164 void
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165 PPC_TimerInit(void)
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166 {
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167 struct TagItem tags[] = {
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168 PPCTIMERTAG_CPU, TRUE,
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169 TAG_DONE, 0
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170 };
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171
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172
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173 if (MyTimer = PPCCreateTimerObject(tags)) {
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174 ULONG result[2];
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175
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176 PPCGetTimerObject(MyTimer, PPCTIMERTAG_TICKSPERSEC, result);
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177 D(bug("Timer inizializzato, TPS: %lu - %lu\n", result[0], result[1]));
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178 // PPCAsr64p(result,10);
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179 result[1] >>= 10;
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180 result[1] |= ((result[0] & 0x3ff) << 22);
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181 result[0] >>= 10;
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182
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183 D(bug("Shiftato TPS: %lu - %lu\n", result[0], result[1]));
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184 MY_CLOCKS_PER_SEC = result[1];
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185
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186 PPCGetTimerObject(MyTimer, PPCTIMERTAG_CURRENTTICKS, result);
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187
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188 D(bug("Current ticks: %lu - %lu\n", result[0], result[1]));
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189 result[1] >>= 10;
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190 result[1] |= ((result[0] & 0x3ff) << 22);
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191 result[0] >>= 10;
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192 // PPCAsr64p(result,10);
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193 D(bug("Shiftato: %lu - %lu\n", result[0], result[1]));
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194 } else {
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195 D(bug("Errore nell'inizializzazione del timer!\n"));
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196 }
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197 }
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198
0
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199 #endif
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200
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201 #include "SDL_thread.h"
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202
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203 /* Data to handle a single periodic alarm */
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204 static int timer_alive = 0;
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205 static SDL_Thread *timer_thread = NULL;
0
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206
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207 static int
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208 RunTimer(void *unused)
0
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209 {
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210 D(bug("SYSTimer: Entering RunTimer loop..."));
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211
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212 if (GfxBase == NULL)
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213 GfxBase = (struct GfxBase *) OpenLibrary("graphics.library", 37);
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214
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215 while (timer_alive) {
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216 if (SDL_timer_running) {
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217 SDL_ThreadedTimerCheck();
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218 }
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219 if (GfxBase)
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220 WaitTOF(); // Check the timer every fifth of seconds. Was SDL_Delay(1)->BusyWait!
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221 else
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222 Delay(1);
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223 }
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224 D(bug("SYSTimer: EXITING RunTimer loop..."));
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225 return (0);
0
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226 }
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227
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228 /* This is only called if the event thread is not running */
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229 int
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230 SDL_SYS_TimerInit(void)
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231 {
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232 D(bug("Creating thread for the timer (NOITIMER)...\n"));
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233
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234 timer_alive = 1;
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235 timer_thread = SDL_CreateThread(RunTimer, NULL);
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236 if (timer_thread == NULL) {
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237 D(bug("Creazione del thread fallita...\n"));
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238
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239 return (-1);
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240 }
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241 return (SDL_SetTimerThreaded(1));
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242 }
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243
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244 void
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245 SDL_SYS_TimerQuit(void)
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246 {
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247 timer_alive = 0;
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248 if (timer_thread) {
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249 SDL_WaitThread(timer_thread, NULL);
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250 timer_thread = NULL;
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251 }
0
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252 }
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253
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254 int
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255 SDL_SYS_StartTimer(void)
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256 {
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257 SDL_SetError("Internal logic error: AmigaOS uses threaded timer");
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258 return (-1);
0
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259 }
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260
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261 void
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262 SDL_SYS_StopTimer(void)
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263 {
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782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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264 return;
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Sam Lantinga <slouken@lokigames.com>
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265 }
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92947e3a18db Make sure code is only compiled if the appropriate subsystem is enabled
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266
92947e3a18db Make sure code is only compiled if the appropriate subsystem is enabled
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267 #endif /* SDL_TIMER_AMIGA */
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782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1635
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268 /* vi: set ts=4 sw=4 expandtab: */