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annotate docs.html @ 4003:ea059917233c SDL-1.2

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Added notes about audio callback behaviour.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 05 Jul 2007 02:53:40 +0000
parents 720c59bd38ac
children 1146681dbb74
rev   line source
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1 <HTML>
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2 <HEAD><TITLE>SDL Stable Release</TITLE></HEAD>
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3 <BODY BGCOLOR="#FFEBCD" TEXT="#000000">
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4
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5 <IMG SRC="docs/images/rainbow.gif" ALT="[separator]" WIDTH="100%">
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6 <P>
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7 This source is stable, and is fully tested on all supported platforms.<br>
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8 Please send bug reports or questions to the SDL mailing list:<br>
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9 <a href="http://www.libsdl.org/mailing-list.php"
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10 >http://www.libsdl.org/mailing-list.php</a><br>
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11 The latest stable release may be found on the
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12 <a href="http://www.libsdl.org/">SDL website</A>.
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13 </P>
0
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14
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15 <H2> <A HREF="docs/index.html">API Documentation</A> </H2>
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16
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17 <H2> SDL 1.2.12 Release Notes </H2>
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18 <P>
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19 SDL 1.2.12 is a minor bug fix release.
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20 </P>
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21
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22 <H3> General Notes </H3>
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23
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24 <BLOCKQUOTE>
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25 <P>
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26 Added support for the PulseAudio sound server: http://www.pulseaudio.org/
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27 </P>
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28 <P>
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29 Added SDL_VIDEO_ALLOW_SCREENSAVER to override SDL's disabling of the screensaver on Mac OS X, Windows, and X11.
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30 </P>
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31 <P>
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32 Fixed buffer overrun crash when resampling audio rates.
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33 </P>
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34 <P>
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35 Fixed audio bug where converting to mono was doubling the volume.
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36 </P>
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37 <P>
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38 Fixed off-by-one error in the C implementation of SDL_revcpy()
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39 </P>
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40 <P>
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41 Fixed compiling with Sun Studio.
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42 </P>
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43 <P>
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44 Support for AmigaOS has been removed from the main SDL code.
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45 </P>
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46 <P>
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47 Support for Nokia 9210 "EPOC" driver has been removed from the main SDL code.
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48 </P>
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49 <P>
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50 Unofficial support for the S60/SymbianOS platform has been added.
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51 </P>
3976
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52 <P>
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53 Unofficial support for the Nintendo DS platform has been added.
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54 </P>
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55 <P>
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56 Audio callbacks must now initialize the entire stream: applications must write silence to the stream if they can't supply data, and not mix against the buffer, as it may be random data.
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57 Users may set SDL_AUDIO_MUST_INIT_BUFFERS to retain the old behaviour, but apps should not depend on this environment variable: just add a memset() at the start of your audio callback instead if you need it.
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58 </P>
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59 </BLOCKQUOTE>
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60
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61 <H3> Unix Notes </H3>
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62
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63 <BLOCKQUOTE>
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64 <P>
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65 Improved XIM support for asian character sets.
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66 </P>
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67 <P>
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68 The GFX_Display has been added to the X11 window information in SDL_syswm.h.
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69 </P>
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70 <P>
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71 Fixed PAGE_SIZE compile error in the fbcon video driver on newer Linux kernels.
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72 </P>
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73 <P>
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74 Fixed hang or crash at startup if aRts can't access the hardware.
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75 </P>
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76 <P>
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77 Fixed relative mouse mode when the cursor starts outside the X11 window.
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78 </P>
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79 <P>
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80 Fixed accidental free of stack memory in X11 mouse acceleration code.
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81 </P>
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82 <P>
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83 Closed minor memory leak in XME code.
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84 </P>
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85 </BLOCKQUOTE>
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86
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87 <H3> Windows Notes </H3>
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88
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89 <BLOCKQUOTE>
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90 <P>
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91 The GDI video driver makes better use of the palette in 8-bit modes.
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92 </P>
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93 <P>
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94 The windib driver now supports more mouse buttons with WM_XBUTTON events.
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95 </P>
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96 <P>
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97 Added support for UTF-8 window titles on Windows.
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98 </P>
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99 <P>
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100 Fixed joystick detection on Windows.
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101 </P>
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102 <P>
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103 Fixed HBITMAP leak in GAPI driver.
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104 </P>
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105 </BLOCKQUOTE>
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106
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107 <H3> Mac OS X Notes </H3>
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108
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109 <BLOCKQUOTE>
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110 <P>
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111 Added support for multi-axis controllers like 3Dconnxion's SpaceNavigator on Mac OS X.
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112 </P>
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113 <P>
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114 Fixed YUV overlay crash inside Quicktime on Intel Mac OS X.
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115 </P>
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116 <P>
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117 Fixed blitting alignment in Altivec alpha blit functions.
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118 </P>
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119 <P>
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120 Keys F13, F14, and F15 are now usable on Apple keyboards under Mac OS X.
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121 </P>
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122 <P>
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123 Fixed joystick calibration code on Mac OS X.
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124 </P>
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125 <P>
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126 Fixed mouse jitter when multiple motion events are queued up in Mac OS X.
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127 </P>
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128 </BLOCKQUOTE>
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129
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130 <H3> Mac OS Classic Notes </H3>
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131
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132 <BLOCKQUOTE>
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133 <P>
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134 Added support for gamma ramps to both toolbox and DrawSprocket video drivers.
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135 </P>
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136 </BLOCKQUOTE>
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137
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138 <H3> BeOS Notes </H3>
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139
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140 <BLOCKQUOTE>
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141 <P>
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142 Implemented mouse grabbing and mouse relative mode on BeOS.
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143 </P>
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144 </BLOCKQUOTE>
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145
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146 <IMG SRC="docs/images/rainbow.gif" ALT="[separator]" WIDTH="100%">
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147
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148 <H2> SDL 1.2.11 Release Notes </H2>
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149 <P>
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150 SDL 1.2.11 is a minor bug fix release.
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151 </P>
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152
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153 <H3> Unix Notes </H3>
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154
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155 <BLOCKQUOTE>
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156 <P>
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157 Dynamic X11 loading is only enabled with gcc 4 supporting -fvisibility=hidden. This fixes crashes related to symbol collisions, and allows building on Solaris and IRIX.
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158 </P>
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159 <P>
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160 Fixed building SDL with Xinerama disabled.
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161 </P>
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162 <P>
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163 Fixed DRI OpenGL library loading, using RTLD_GLOBAL in dlopen().
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164 </P>
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165 <P>
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166 Added pkgconfig configuration support.
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167 </P>
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168 </BLOCKQUOTE>
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169
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170 <H3> Windows Notes </H3>
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171
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172 <BLOCKQUOTE>
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173 <P>
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174 Setting SDL_GL_SWAP_CONTROL now works with Windows OpenGL.
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175 </P>
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176 <P>
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177 The Win32 window positioning code works properly for windows with menus.
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178 </P>
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179 <P>
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180 DirectSound audio quality has been improved on certain sound cards.
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181 </P>
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182 <P>
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183 Fixed 5.1 audio channel ordering on Windows and Mac OS X.
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184 </P>
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185 <P>
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186 Plugged a couple of minor memory leaks in the windib video driver.
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187 </P>
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188 <P>
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189 Fixed type collision with stdint.h when building with gcc on Win32.
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190 </P>
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191 <P>
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192 Fixed building with the Digital Mars Compiler on Win32.
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193 </P>
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194 </BLOCKQUOTE>
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195
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196 <H3> Mac OS X Notes </H3>
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197
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198 <BLOCKQUOTE>
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199 <P>
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200 The Quartz video driver supports 32x32 cursors on Mac OS X 10.3 and above.
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201 </P>
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202 </BLOCKQUOTE>
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203
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204 <IMG SRC="docs/images/rainbow.gif" ALT="[separator]" WIDTH="100%">
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205
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206 <H2> SDL 1.2.10 Release Notes </H2>
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207 <P>
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208 SDL 1.2.10 is a major release, featuring a revamp of the build system and many API improvements and bug fixes.
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209 </P>
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210 <H3> API enhancements </H3>
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211 <UL>
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212 <LI>
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213 If SDL_OpenAudio() is passed zero for the desired format
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214 fields, the following environment variables will be used
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215 to fill them in:
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216 <pre><code>
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217 SDL_AUDIO_FREQUENCY
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218 SDL_AUDIO_FORMAT
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219 SDL_AUDIO_CHANNELS
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220 SDL_AUDIO_SAMPLES
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221 </code></pre>
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222 If an environment variable is not specified, it will be set
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223 to a reasonable default value.
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224 <LI>
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225 SDL_SetVideoMode() now accepts 0 for width or height and will use
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226 the current video mode (or the desktop mode if no mode has been set.)
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227 <LI>
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228 Added current_w and current_h to the SDL_VideoInfo structure,
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229 which is set to the desktop resolution during video intialization,
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230 and then set to the current resolution when a video mode is set.
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231 <LI>
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232 SDL_GL_LoadLibrary() will load the system default OpenGL library
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233 if it is passed NULL as a parameter.
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234 <LI>
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235 Added SDL_GL_SWAP_CONTROL to wait for vsync in OpenGL applications.
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236 <LI>
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237 Added SDL_GL_ACCELERATED_VISUAL to guarantee hardware acceleration.
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238 <LI>
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239 SDL_WM_SetCaption() now officially takes UTF-8 title and icon strings, and displays international characters on supported platforms.
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240 <LI>
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241 Added SDL_GetKeyRepeat() to query the key repeat settings.
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242 <LI>
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243 Added the "dummy" audio driver, which can be used to emulate audio
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244 output without a sound card.
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245 <LI>
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246 Added SDL_config.h, with defaults for various build environments.
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247 </UL>
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248
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249 <H3> General Notes </H3>
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250
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251 <BLOCKQUOTE>
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252 <P>
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253 The SDL website now has an <A HREF="http://www.libsdl.org/rss/rss.xml">RSS feed</A>!
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254 <P>
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255 The SDL development source code is now managed with <A HREF="http://www.libsdl.org/svn.php">Subversion</A>.
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256 <P>
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257 SDL now uses the Bugzilla <A HREF="http://bugzilla.libsdl.org/">bug tracking system</A>, hosted by icculus.org.
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258 <P>
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259 SDL is licensed under version 2.1 of the GNU Lesser General Public License.
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260 <P>
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261 The entire build system has been revamped to make it much more portable, including versions of C library functions to make it possible to run SDL on a minimal embedded environment. See README.Porting in the SDL source distribution for information on how to port SDL to a new platform.
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262 <P>
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263 SDL_opengl.h has been updated with the latest glext.h from <A HREF="http://oss.sgi.com/projects/ogl-sample/registry/">http://oss.sgi.com/projects/ogl-sample/registry/</A>
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264 <P>
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265 Alex Volkov contributed highly optimized RGB <-> RGBA blitters.
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266 </BLOCKQUOTE>
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267
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268 <H3> Unix Notes </H3>
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269
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270 <BLOCKQUOTE>
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271 <P>
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272 The X11 libraries are dynamically loaded at runtime by default. This allows the distributed version of SDL to run on systems without X11 libraries installed.
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273 <P>
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274 The XiG XME extension code is now included in the X11 video driver by default.
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275 <P>
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276 XRandR support for video mode switching has been added to the X11 driver, but is disabled because of undesired interactions with window managers. You can enable this by setting the environment variable SDL_VIDEO_X11_XRANDR to 1.
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277 <P>
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278 Xinerama multi-head displays are properly handled now, and the SDL_VIDEO_FULLSCREEN_HEAD environment variable can be used to select the screen used for fullscreen video modes. Note that changing the video modes only works on screen 0.
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279 <P>
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280 XVidMode video modes are now sorted so they maintain the refresh rates specified in the X11 configuration file.
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281 <P>
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282 SDL windows are no longer transparent in X11 compositing systems like XGL.
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283 <P>
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284 The mouse is properly released by the X11 video driver if the fullscreen window loses focus.
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285 <P>
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286 The X11 input driver now uses XIM to handle international input.
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287 <P>
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288 The screensaver and DPMS monitor blanking are disabled while SDL games are running under the X11 and DGA video drivers. This behavior will be formalized and selectable in SDL 1.3.
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289 <P>
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290 Fixed a bug preventing stereo OpenGL contexts from being selected on the X11 driver.
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291 <P>
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292 The DGA video driver now waits for pending blits involving surfaces before they are freed. This prevents display oddities when using SDL_DisplayFormat() to convert many images.
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293 <P>
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294 The framebuffer console video driver now has a parser for /etc/fb.modes for improved video mode handling.
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295 <P>
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296 The framebuffer console video driver now allows asynchronous VT switching, and restores the full contents of the screen when switched back.
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297 <P>
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298 The framebuffer console now uses CTRL-ALT-FN to switch virtual terminals, to avoid collisions with application key bindings.
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299 <P>
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300 The framebuffer console input driver correctly sets IMPS/2 mode for wheel mice. It also properly detects when gpm is in IMPS/2 protocol mode, or passing raw protocol from an IMPS/2 mouse.
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301 <P>
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302 The SVGAlib video driver now has support for banked (non-linear) video modes.
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303 <P>
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304 A video driver for OpenBSD on the Sharp Zaurus has been contributed by Staffan Ulfberg. See the file README.wscons in the SDL source distribution for details.
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305 <P>
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306 Many patches have been incorporated from *BSD ports.
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307 </BLOCKQUOTE>
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308
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309 <H3> Windows Notes </H3>
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310
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311 <BLOCKQUOTE>
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312 <P>
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313 The "windib" video driver is the default now, to prevent problems with certain laptops, 64-bit Windows, and Windows Vista. The DirectX driver is still available, and can be selected by setting the environment variable SDL_VIDEODRIVER to "directx".
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314 <P>
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315 SDL has been ported to 64-bit Windows.
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316 <P>
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317 Dmitry Yakimov contributed a GAPI video driver for Windows CE.
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318 <P>
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319 The default fullscreen refresh rate has been increased to match the desktop refresh rate, when using equivalent resolutions. A full API for querying and selecting refresh rates is planned for SDL 1.3.
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320 <P>
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321 Dialog boxes are now shown when SDL is in windowed OpenGL mode.
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322 <P>
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323 The SDL window is recreated when necessary to maintain OpenGL context attributes, when switching between windowed and fullscreen modes.
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324 <P>
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325 An SDL_VIDEORESIZE event is properly sent when the SDL window is maximized and restored.
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326 <P>
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327 Window positions are retained when switching between fullscreen and windowed modes.
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328 <P>
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329 ToUnicode() is used, when available, for improved handling of international keyboard input.
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330 <P>
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331 The PrtScrn is now treated normally with both key down and key up events.
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332 <P>
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333 Pressing ALT-F4 now delivers an SDL_QUIT event to SDL applications.
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334 <P>
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335 Joystick names are now correct for joysticks which have been unplugged and then plugged back in since booting.
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336 <P>
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337 An MCI error when playing the last track on a CD-ROM has been fixed.
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338 <P>
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339 OpenWatcom projects for building SDL have been provided by Marc Peter.
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340 </BLOCKQUOTE>
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341
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342 <H3> Mac OS X Notes </H3>
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343
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344 <BLOCKQUOTE>
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345 <P>
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346 SDL now supports building Universal binaries, both through Xcode projects and when using configure/make. See README.MacOSX in the SDL source archive for details.
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347 <P>
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348 The X11 video driver with GLX support can be built on Mac OS X, if the X11 development SDK is installed.
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349 <P>
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350 Transitions between fullscreen resolutions and windowed mode now use a much faster asynchronous fade to hide desktop flicker.
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351 <P>
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352 Icons set with SDL_WM_SetIcon() now have the proper colors on Intel Macs.
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353 </BLOCKQUOTE>
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354
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355 <H3> OS/2 Notes </H3>
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356
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357 <BLOCKQUOTE>
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358 <P>
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359 Projects for building SDL on OS/2 with OpenWatcom have been contributed by Doodle. See the file README.OS2 in the SDL source distribution for details.
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360 </BLOCKQUOTE>
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361
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362 <IMG SRC="docs/images/rainbow.gif" ALT="[separator]" WIDTH="100%">
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363
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364 </BODY>
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365 </HTML>