Mercurial > sdl-ios-xcode
annotate docs/html/sdlquitevent.html @ 1240:3b8a43c428bb
From Bug #36:
There are a couple of issues with the selection of Altivec alpha-blitting
routines in CalculateAlphaBlit() in src/video/SDL_Blit_A.c.
1) There's no check for the presence of Altivec when checking if the
Blit32to565PixelAlphaAltivec() routine can be selected.
2) Altivec cannot be used in video memory, and there's no check if the
destination surface is a hardware surface. (Alpha-blitting to a hardware
surface with GPU support is a bad idea, but somebody's bound to do it anyway.)
Patch to fix these attached.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sun, 08 Jan 2006 21:18:15 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_QuitEvent</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="SDL Event Structures." | |
| 14 HREF="eventstructures.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_UserEvent" | |
| 17 HREF="sdluserevent.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_keysym" | |
| 20 HREF="sdlkeysym.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="sdluserevent.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="sdlkeysym.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="SDLQUITEVENT" | |
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74 ></A |
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75 >SDL_QuitEvent</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN4621" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_QuitEvent -- Quit requested event</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSECT1" | |
| 86 ><A | |
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87 NAME="AEN4624" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Structure Definition</H2 | |
| 91 ><PRE | |
| 92 CLASS="PROGRAMLISTING" | |
| 93 >typedef struct{ | |
| 94 Uint8 type | |
| 95 } SDL_QuitEvent;</PRE | |
| 96 ></DIV | |
| 97 ><DIV | |
| 98 CLASS="REFSECT1" | |
| 99 ><A | |
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100 NAME="AEN4627" |
| 0 | 101 ></A |
| 102 ><H2 | |
| 103 >Structure Data</H2 | |
| 104 ><DIV | |
| 105 CLASS="INFORMALTABLE" | |
| 106 ><A | |
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107 NAME="AEN4629" |
| 0 | 108 ></A |
| 109 ><P | |
| 110 ></P | |
| 111 ><TABLE | |
| 112 BORDER="0" | |
| 113 CLASS="CALSTABLE" | |
| 114 ><TBODY | |
| 115 ><TR | |
| 116 ><TD | |
| 117 ALIGN="LEFT" | |
| 118 VALIGN="TOP" | |
| 119 ><TT | |
| 120 CLASS="STRUCTFIELD" | |
| 121 ><I | |
| 122 >type</I | |
| 123 ></TT | |
| 124 ></TD | |
| 125 ><TD | |
| 126 ALIGN="LEFT" | |
| 127 VALIGN="TOP" | |
| 128 ><TT | |
| 129 CLASS="LITERAL" | |
| 130 >SDL_QUIT</TT | |
| 131 ></TD | |
| 132 ></TR | |
| 133 ></TBODY | |
| 134 ></TABLE | |
| 135 ><P | |
| 136 ></P | |
| 137 ></DIV | |
| 138 ></DIV | |
| 139 ><DIV | |
| 140 CLASS="REFSECT1" | |
| 141 ><A | |
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142 NAME="AEN4637" |
| 0 | 143 ></A |
| 144 ><H2 | |
| 145 >Description</H2 | |
| 146 ><P | |
| 147 ><SPAN | |
| 148 CLASS="STRUCTNAME" | |
| 149 >SDL_QuitEvent</SPAN | |
| 150 > is a member of the <A | |
| 151 HREF="sdlevent.html" | |
| 152 ><SPAN | |
| 153 CLASS="STRUCTNAME" | |
| 154 >SDL_Event</SPAN | |
| 155 ></A | |
| 156 > union and is used whan an event of type <TT | |
| 157 CLASS="LITERAL" | |
| 158 >SDL_QUIT</TT | |
| 159 > is reported.</P | |
| 160 ><P | |
| 161 >As can be seen, the SDL_QuitEvent structure serves no useful purpose. The event itself, on the other hand, is very important. If you filter out or ignore a quit event then it is impossible for the user to close the window. On the other hand, if you do accept a quit event then the application window will be closed, and screen updates will still report success event though the application will no longer be visible.</P | |
| 162 ><DIV | |
| 163 CLASS="NOTE" | |
| 164 ><BLOCKQUOTE | |
| 165 CLASS="NOTE" | |
| 166 ><P | |
| 167 ><B | |
| 168 >Note: </B | |
| 169 >The macro <TT | |
| 170 CLASS="FUNCTION" | |
| 171 >SDL_QuitRequested</TT | |
| 172 > will return non-zero if a quit event is pending</P | |
| 173 ></BLOCKQUOTE | |
| 174 ></DIV | |
| 175 ></DIV | |
| 176 ><DIV | |
| 177 CLASS="REFSECT1" | |
| 178 ><A | |
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179 NAME="AEN4648" |
| 0 | 180 ></A |
| 181 ><H2 | |
| 182 >See Also</H2 | |
| 183 ><P | |
| 184 ><A | |
| 185 HREF="sdlevent.html" | |
| 186 ><SPAN | |
| 187 CLASS="STRUCTNAME" | |
| 188 >SDL_Event</SPAN | |
| 189 ></A | |
| 190 >, | |
| 191 <A | |
| 192 HREF="sdlseteventfilter.html" | |
| 193 ><TT | |
| 194 CLASS="FUNCTION" | |
| 195 >SDL_SetEventFilter</TT | |
| 196 ></A | |
| 197 ></P | |
| 198 ></DIV | |
| 199 ><DIV | |
| 200 CLASS="NAVFOOTER" | |
| 201 ><HR | |
| 202 ALIGN="LEFT" | |
| 203 WIDTH="100%"><TABLE | |
|
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355632dca928
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parents:
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204 SUMMARY="Footer navigation table" |
| 0 | 205 WIDTH="100%" |
| 206 BORDER="0" | |
| 207 CELLPADDING="0" | |
| 208 CELLSPACING="0" | |
| 209 ><TR | |
| 210 ><TD | |
| 211 WIDTH="33%" | |
| 212 ALIGN="left" | |
| 213 VALIGN="top" | |
| 214 ><A | |
| 215 HREF="sdluserevent.html" | |
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803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
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216 ACCESSKEY="P" |
| 0 | 217 >Prev</A |
| 218 ></TD | |
| 219 ><TD | |
| 220 WIDTH="34%" | |
| 221 ALIGN="center" | |
| 222 VALIGN="top" | |
| 223 ><A | |
| 224 HREF="index.html" | |
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803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
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225 ACCESSKEY="H" |
| 0 | 226 >Home</A |
| 227 ></TD | |
| 228 ><TD | |
| 229 WIDTH="33%" | |
| 230 ALIGN="right" | |
| 231 VALIGN="top" | |
| 232 ><A | |
| 233 HREF="sdlkeysym.html" | |
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803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
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234 ACCESSKEY="N" |
| 0 | 235 >Next</A |
| 236 ></TD | |
| 237 ></TR | |
| 238 ><TR | |
| 239 ><TD | |
| 240 WIDTH="33%" | |
| 241 ALIGN="left" | |
| 242 VALIGN="top" | |
| 243 >SDL_UserEvent</TD | |
| 244 ><TD | |
| 245 WIDTH="34%" | |
| 246 ALIGN="center" | |
| 247 VALIGN="top" | |
| 248 ><A | |
| 249 HREF="eventstructures.html" | |
|
803
355632dca928
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Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
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250 ACCESSKEY="U" |
| 0 | 251 >Up</A |
| 252 ></TD | |
| 253 ><TD | |
| 254 WIDTH="33%" | |
| 255 ALIGN="right" | |
| 256 VALIGN="top" | |
| 257 >SDL_keysym</TD | |
| 258 ></TR | |
| 259 ></TABLE | |
| 260 ></DIV | |
| 261 ></BODY | |
| 262 ></HTML | |
| 263 > |