Mercurial > sdl-ios-xcode
annotate docs/html/sdlwarpmouse.html @ 3880:74e828c64315 SDL-1.2
Fixed bug #292
I might be on crack here.
It looks like SDL_ConvertMono() in src/audio/SDL_audiocvt.c adds the left and
right channels of a stereo stream together, and clamps the new mono channel if
it would overflow.
Shouldn't it be dividing by 2 to average the two sample points instead of
clamping? Otherwise the mono sample point's volume doubles in the conversion.
This would also make the conversion faster, as it replaces two branches per
sample frame with a bitwise shift.
--ryan.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 24 Sep 2006 15:45:37 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_WarpMouse</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
|
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ |
| 0 | 8 "><LINK |
| 9 REL="HOME" | |
| 10 TITLE="SDL Library Documentation" | |
| 11 HREF="index.html"><LINK | |
| 12 REL="UP" | |
| 13 TITLE="Video" | |
| 14 HREF="video.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_DisplayFormatAlpha" | |
| 17 HREF="sdldisplayformatalpha.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_CreateCursor" | |
| 20 HREF="sdlcreatecursor.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="REFENTRY" | |
| 23 BGCOLOR="#FFF8DC" | |
| 24 TEXT="#000000" | |
| 25 LINK="#0000ee" | |
| 26 VLINK="#551a8b" | |
| 27 ALINK="#ff0000" | |
| 28 ><DIV | |
| 29 CLASS="NAVHEADER" | |
| 30 ><TABLE | |
|
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31 SUMMARY="Header navigation table" |
| 0 | 32 WIDTH="100%" |
| 33 BORDER="0" | |
| 34 CELLPADDING="0" | |
| 35 CELLSPACING="0" | |
| 36 ><TR | |
| 37 ><TH | |
| 38 COLSPAN="3" | |
| 39 ALIGN="center" | |
| 40 >SDL Library Documentation</TH | |
| 41 ></TR | |
| 42 ><TR | |
| 43 ><TD | |
| 44 WIDTH="10%" | |
| 45 ALIGN="left" | |
| 46 VALIGN="bottom" | |
| 47 ><A | |
| 48 HREF="sdldisplayformatalpha.html" | |
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49 ACCESSKEY="P" |
| 0 | 50 >Prev</A |
| 51 ></TD | |
| 52 ><TD | |
| 53 WIDTH="80%" | |
| 54 ALIGN="center" | |
| 55 VALIGN="bottom" | |
| 56 ></TD | |
| 57 ><TD | |
| 58 WIDTH="10%" | |
| 59 ALIGN="right" | |
| 60 VALIGN="bottom" | |
| 61 ><A | |
| 62 HREF="sdlcreatecursor.html" | |
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63 ACCESSKEY="N" |
| 0 | 64 >Next</A |
| 65 ></TD | |
| 66 ></TR | |
| 67 ></TABLE | |
| 68 ><HR | |
| 69 ALIGN="LEFT" | |
| 70 WIDTH="100%"></DIV | |
| 71 ><H1 | |
| 72 ><A | |
| 73 NAME="SDLWARPMOUSE" | |
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74 ></A |
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75 >SDL_WarpMouse</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN2465" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_WarpMouse -- Set the position of the mouse cursor.</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
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87 NAME="AEN2468" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
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94 NAME="AEN2469" |
| 0 | 95 ></A |
| 96 ><P | |
| 97 ></P | |
| 98 ><PRE | |
| 99 CLASS="FUNCSYNOPSISINFO" | |
| 100 >#include "SDL.h"</PRE | |
| 101 ><P | |
| 102 ><CODE | |
| 103 ><CODE | |
| 104 CLASS="FUNCDEF" | |
| 105 >void <B | |
| 106 CLASS="FSFUNC" | |
| 107 >SDL_WarpMouse</B | |
| 108 ></CODE | |
| 109 >(Uint16 x, Uint16 y);</CODE | |
| 110 ></P | |
| 111 ><P | |
| 112 ></P | |
| 113 ></DIV | |
| 114 ></DIV | |
| 115 ><DIV | |
| 116 CLASS="REFSECT1" | |
| 117 ><A | |
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118 NAME="AEN2475" |
| 0 | 119 ></A |
| 120 ><H2 | |
| 121 >Description</H2 | |
| 122 ><P | |
| 123 >Set the position of the mouse cursor (generates a mouse motion event).</P | |
| 124 ></DIV | |
| 125 ><DIV | |
| 126 CLASS="REFSECT1" | |
| 127 ><A | |
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128 NAME="AEN2478" |
| 0 | 129 ></A |
| 130 ><H2 | |
| 131 >See Also</H2 | |
| 132 ><P | |
| 133 ><A | |
| 134 HREF="sdlmousemotionevent.html" | |
| 135 ><SPAN | |
| 136 CLASS="STRUCTNAME" | |
| 137 >SDL_MouseMotionEvent</SPAN | |
| 138 ></A | |
| 139 ></P | |
| 140 ></DIV | |
| 141 ><DIV | |
| 142 CLASS="NAVFOOTER" | |
| 143 ><HR | |
| 144 ALIGN="LEFT" | |
| 145 WIDTH="100%"><TABLE | |
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146 SUMMARY="Footer navigation table" |
| 0 | 147 WIDTH="100%" |
| 148 BORDER="0" | |
| 149 CELLPADDING="0" | |
| 150 CELLSPACING="0" | |
| 151 ><TR | |
| 152 ><TD | |
| 153 WIDTH="33%" | |
| 154 ALIGN="left" | |
| 155 VALIGN="top" | |
| 156 ><A | |
| 157 HREF="sdldisplayformatalpha.html" | |
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158 ACCESSKEY="P" |
| 0 | 159 >Prev</A |
| 160 ></TD | |
| 161 ><TD | |
| 162 WIDTH="34%" | |
| 163 ALIGN="center" | |
| 164 VALIGN="top" | |
| 165 ><A | |
| 166 HREF="index.html" | |
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parents:
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167 ACCESSKEY="H" |
| 0 | 168 >Home</A |
| 169 ></TD | |
| 170 ><TD | |
| 171 WIDTH="33%" | |
| 172 ALIGN="right" | |
| 173 VALIGN="top" | |
| 174 ><A | |
| 175 HREF="sdlcreatecursor.html" | |
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355632dca928
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parents:
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changeset
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176 ACCESSKEY="N" |
| 0 | 177 >Next</A |
| 178 ></TD | |
| 179 ></TR | |
| 180 ><TR | |
| 181 ><TD | |
| 182 WIDTH="33%" | |
| 183 ALIGN="left" | |
| 184 VALIGN="top" | |
| 185 >SDL_DisplayFormatAlpha</TD | |
| 186 ><TD | |
| 187 WIDTH="34%" | |
| 188 ALIGN="center" | |
| 189 VALIGN="top" | |
| 190 ><A | |
| 191 HREF="video.html" | |
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803
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parents:
181
diff
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192 ACCESSKEY="U" |
| 0 | 193 >Up</A |
| 194 ></TD | |
| 195 ><TD | |
| 196 WIDTH="33%" | |
| 197 ALIGN="right" | |
| 198 VALIGN="top" | |
| 199 >SDL_CreateCursor</TD | |
| 200 ></TR | |
| 201 ></TABLE | |
| 202 ></DIV | |
| 203 ></BODY | |
| 204 ></HTML | |
| 205 > |