Mercurial > sdl-ios-xcode
annotate docs/html/sdlshowcursor.html @ 4355:9b464226e541 SDL-1.2
Fixed bug #855
Ludwig Nussel 2009-10-18 06:31:52 PDT
an mprotect call was added to fix bug 528. However that results in a buffer
that allows writing and code execution. Ie the no-execute security features of
modern operating systems are defeated this way. Two mprotect calls are needed.
One to make the buffer executable but not writeable when done and another one
to make the buffer writeable again if the content needs to be changed.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 18 Oct 2009 17:31:37 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_ShowCursor</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_GetCursor" | |
| 17 HREF="sdlgetcursor.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_GL_LoadLibrary" | |
| 20 HREF="sdlglloadlibrary.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="sdlgetcursor.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="sdlglloadlibrary.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="SDLSHOWCURSOR" | |
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74 ></A |
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75 >SDL_ShowCursor</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN2615" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_ShowCursor -- Toggle whether or not the cursor is shown on the screen.</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
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87 NAME="AEN2618" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
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94 NAME="AEN2619" |
| 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 >int <B | |
| 106 CLASS="FSFUNC" | |
| 107 >SDL_ShowCursor</B | |
| 108 ></CODE | |
| 109 >(int toggle);</CODE | |
| 110 ></P | |
| 111 ><P | |
| 112 ></P | |
| 113 ></DIV | |
| 114 ></DIV | |
| 115 ><DIV | |
| 116 CLASS="REFSECT1" | |
| 117 ><A | |
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118 NAME="AEN2625" |
| 0 | 119 ></A |
| 120 ><H2 | |
| 121 >Description</H2 | |
| 122 ><P | |
| 123 >Toggle whether or not the cursor is shown on the screen. Passing <TT | |
| 124 CLASS="LITERAL" | |
| 125 >SDL_ENABLE</TT | |
| 126 > displays the cursor and passing <TT | |
| 127 CLASS="LITERAL" | |
| 128 >SDL_DISABLE</TT | |
| 129 > hides it. The current state of the mouse cursor can be queried by passing <TT | |
| 130 CLASS="LITERAL" | |
| 131 >SDL_QUERY</TT | |
| 132 >, either <TT | |
| 133 CLASS="LITERAL" | |
| 134 >SDL_DISABLE</TT | |
| 135 > or <TT | |
| 136 CLASS="LITERAL" | |
| 137 >SDL_ENABLE</TT | |
| 138 > will be returned.</P | |
| 139 ><P | |
| 140 >The cursor starts off displayed, but can be turned off.</P | |
| 141 ></DIV | |
| 142 ><DIV | |
| 143 CLASS="REFSECT1" | |
| 144 ><A | |
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145 NAME="AEN2634" |
| 0 | 146 ></A |
| 147 ><H2 | |
| 148 >Return Value</H2 | |
| 149 ><P | |
| 150 >Returns the current state of the cursor.</P | |
| 151 ></DIV | |
| 152 ><DIV | |
| 153 CLASS="REFSECT1" | |
| 154 ><A | |
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155 NAME="AEN2637" |
| 0 | 156 ></A |
| 157 ><H2 | |
| 158 >See Also</H2 | |
| 159 ><P | |
| 160 ><A | |
| 161 HREF="sdlcreatecursor.html" | |
| 162 ><TT | |
| 163 CLASS="FUNCTION" | |
| 164 >SDL_CreateCursor</TT | |
| 165 ></A | |
| 166 >, | |
| 167 <A | |
| 168 HREF="sdlsetcursor.html" | |
| 169 ><TT | |
| 170 CLASS="FUNCTION" | |
| 171 >SDL_SetCursor</TT | |
| 172 ></A | |
| 173 ></P | |
| 174 ></DIV | |
| 175 ><DIV | |
| 176 CLASS="NAVFOOTER" | |
| 177 ><HR | |
| 178 ALIGN="LEFT" | |
| 179 WIDTH="100%"><TABLE | |
|
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parents:
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180 SUMMARY="Footer navigation table" |
| 0 | 181 WIDTH="100%" |
| 182 BORDER="0" | |
| 183 CELLPADDING="0" | |
| 184 CELLSPACING="0" | |
| 185 ><TR | |
| 186 ><TD | |
| 187 WIDTH="33%" | |
| 188 ALIGN="left" | |
| 189 VALIGN="top" | |
| 190 ><A | |
| 191 HREF="sdlgetcursor.html" | |
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803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
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192 ACCESSKEY="P" |
| 0 | 193 >Prev</A |
| 194 ></TD | |
| 195 ><TD | |
| 196 WIDTH="34%" | |
| 197 ALIGN="center" | |
| 198 VALIGN="top" | |
| 199 ><A | |
| 200 HREF="index.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
201 ACCESSKEY="H" |
| 0 | 202 >Home</A |
| 203 ></TD | |
| 204 ><TD | |
| 205 WIDTH="33%" | |
| 206 ALIGN="right" | |
| 207 VALIGN="top" | |
| 208 ><A | |
| 209 HREF="sdlglloadlibrary.html" | |
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803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
210 ACCESSKEY="N" |
| 0 | 211 >Next</A |
| 212 ></TD | |
| 213 ></TR | |
| 214 ><TR | |
| 215 ><TD | |
| 216 WIDTH="33%" | |
| 217 ALIGN="left" | |
| 218 VALIGN="top" | |
| 219 >SDL_GetCursor</TD | |
| 220 ><TD | |
| 221 WIDTH="34%" | |
| 222 ALIGN="center" | |
| 223 VALIGN="top" | |
| 224 ><A | |
| 225 HREF="video.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
226 ACCESSKEY="U" |
| 0 | 227 >Up</A |
| 228 ></TD | |
| 229 ><TD | |
| 230 WIDTH="33%" | |
| 231 ALIGN="right" | |
| 232 VALIGN="top" | |
| 233 >SDL_GL_LoadLibrary</TD | |
| 234 ></TR | |
| 235 ></TABLE | |
| 236 ></DIV | |
| 237 ></BODY | |
| 238 ></HTML | |
| 239 > |