Mercurial > sdl-ios-xcode
annotate docs/html/guideeventexamples.html @ 1585:980d2a0dc2a3
Date: Tue, 4 Mar 2003 15:05:31 -0800
From: "Jim"
Subject: [SDL] Frame Buffer patches...
Okay I'm new at patch generation - so please tell me if there's a better way
I could have done this.
Attached are two patch files generated with 'cvs diff -u'
SDL-fb-open-lock.patch applies to SDL_fbvideo.c
Modifies the open loop to check /dev/fb/0 found on devfs...
Modifies the lock code to return failure if the current virtual terminal
is not the one opened for frame buffer writing...
Lock would hang forever if switched away (ctrl-alt-F1) ...
SDL-fb-mousedrv-screensave.patch applies to SDL_fbevents.c
Switches default mouse mode based on SDL_MOUSEDRV - currently only
accepts PS2 - otherwise default is MS Mouse.
When the screen is switched - exisiting code (wrapped in ifdef
SAVE_SCREEN_COTENTS) would save the wrong bit of the screen....
( I run frame buffer 1600x1200, the size I requested was 800x600 - the
save would save the top 800 lines (non biased) and restore them... Adding
screen->offset fixed that )
However, if that option is not set, then a call to SDL_UpdateRect (full
screen) is made. (which may have had it's contents changed since the screen
is not entirely locked because of lock-failure patch)
Jim
[patches slightly tweaked for SDL 1.2.10]
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 22 Mar 2006 07:48:22 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >Event Examples</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="Examples" | |
| 14 HREF="guideexamples.html"><LINK | |
| 15 REL="PREVIOUS" | |
|
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16 TITLE="Examples" |
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17 HREF="guideexamples.html"><LINK |
| 0 | 18 REL="NEXT" |
| 19 TITLE="Audio Examples" | |
| 20 HREF="guideaudioexamples.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="SECT1" | |
| 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 | |
|
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48 HREF="guideexamples.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 >Chapter 4. Examples</TD | |
| 57 ><TD | |
| 58 WIDTH="10%" | |
| 59 ALIGN="right" | |
| 60 VALIGN="bottom" | |
| 61 ><A | |
| 62 HREF="guideaudioexamples.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 ><DIV | |
| 72 CLASS="SECT1" | |
| 73 ><H1 | |
| 74 CLASS="SECT1" | |
| 75 ><A | |
| 76 NAME="GUIDEEVENTEXAMPLES" | |
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77 ></A |
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78 >Event Examples</H1 |
| 0 | 79 ><P |
| 80 ></P | |
| 81 ><DIV | |
| 82 CLASS="SECT2" | |
| 83 ><H2 | |
| 84 CLASS="SECT2" | |
| 85 ><A | |
|
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86 NAME="AEN375" |
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87 ></A |
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88 >Filtering and Handling Events</H2 |
| 0 | 89 ><P |
| 90 ><PRE | |
| 91 CLASS="PROGRAMLISTING" | |
| 92 >#include <stdio.h> | |
| 93 #include <stdlib.h> | |
| 94 | |
| 95 #include "SDL.h" | |
| 96 | |
| 97 /* This function may run in a separate event thread */ | |
| 98 int FilterEvents(const SDL_Event *event) { | |
| 99 static int boycott = 1; | |
| 100 | |
| 101 /* This quit event signals the closing of the window */ | |
| 102 if ( (event->type == SDL_QUIT) && boycott ) { | |
| 103 printf("Quit event filtered out -- try again.\n"); | |
| 104 boycott = 0; | |
| 105 return(0); | |
| 106 } | |
| 107 if ( event->type == SDL_MOUSEMOTION ) { | |
| 108 printf("Mouse moved to (%d,%d)\n", | |
| 109 event->motion.x, event->motion.y); | |
| 110 return(0); /* Drop it, we've handled it */ | |
| 111 } | |
| 112 return(1); | |
| 113 } | |
| 114 | |
| 115 int main(int argc, char *argv[]) | |
| 116 { | |
| 117 SDL_Event event; | |
| 118 | |
| 119 /* Initialize the SDL library (starts the event loop) */ | |
| 120 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { | |
| 121 fprintf(stderr, | |
| 122 "Couldn't initialize SDL: %s\n", SDL_GetError()); | |
| 123 exit(1); | |
| 124 } | |
| 125 | |
| 126 /* Clean up on exit, exit on window close and interrupt */ | |
| 127 atexit(SDL_Quit); | |
| 128 | |
| 129 /* Ignore key events */ | |
| 130 SDL_EventState(SDL_KEYDOWN, SDL_IGNORE); | |
| 131 SDL_EventState(SDL_KEYUP, SDL_IGNORE); | |
| 132 | |
| 133 /* Filter quit and mouse motion events */ | |
| 134 SDL_SetEventFilter(FilterEvents); | |
| 135 | |
| 136 /* The mouse isn't much use unless we have a display for reference */ | |
| 137 if ( SDL_SetVideoMode(640, 480, 8, 0) == NULL ) { | |
| 138 fprintf(stderr, "Couldn't set 640x480x8 video mode: %s\n", | |
| 139 SDL_GetError()); | |
| 140 exit(1); | |
| 141 } | |
| 142 | |
| 143 /* Loop waiting for ESC+Mouse_Button */ | |
| 144 while ( SDL_WaitEvent(&event) >= 0 ) { | |
| 145 switch (event.type) { | |
| 146 case SDL_ACTIVEEVENT: { | |
| 147 if ( event.active.state & SDL_APPACTIVE ) { | |
| 148 if ( event.active.gain ) { | |
| 149 printf("App activated\n"); | |
| 150 } else { | |
| 151 printf("App iconified\n"); | |
| 152 } | |
| 153 } | |
| 154 } | |
| 155 break; | |
| 156 | |
| 157 case SDL_MOUSEBUTTONDOWN: { | |
| 158 Uint8 *keys; | |
| 159 | |
| 160 keys = SDL_GetKeyState(NULL); | |
| 161 if ( keys[SDLK_ESCAPE] == SDL_PRESSED ) { | |
| 162 printf("Bye bye...\n"); | |
| 163 exit(0); | |
| 164 } | |
| 165 printf("Mouse button pressed\n"); | |
| 166 } | |
| 167 break; | |
| 168 | |
| 169 case SDL_QUIT: { | |
| 170 printf("Quit requested, quitting.\n"); | |
| 171 exit(0); | |
| 172 } | |
| 173 break; | |
| 174 } | |
| 175 } | |
| 176 /* This should never happen */ | |
| 177 printf("SDL_WaitEvent error: %s\n", SDL_GetError()); | |
| 178 exit(1); | |
| 179 }</PRE | |
| 180 ></P | |
| 181 ></DIV | |
| 182 ></DIV | |
| 183 ><DIV | |
| 184 CLASS="NAVFOOTER" | |
| 185 ><HR | |
| 186 ALIGN="LEFT" | |
| 187 WIDTH="100%"><TABLE | |
|
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355632dca928
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parents:
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diff
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188 SUMMARY="Footer navigation table" |
| 0 | 189 WIDTH="100%" |
| 190 BORDER="0" | |
| 191 CELLPADDING="0" | |
| 192 CELLSPACING="0" | |
| 193 ><TR | |
| 194 ><TD | |
| 195 WIDTH="33%" | |
| 196 ALIGN="left" | |
| 197 VALIGN="top" | |
| 198 ><A | |
|
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parents:
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199 HREF="guideexamples.html" |
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803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
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200 ACCESSKEY="P" |
| 0 | 201 >Prev</A |
| 202 ></TD | |
| 203 ><TD | |
| 204 WIDTH="34%" | |
| 205 ALIGN="center" | |
| 206 VALIGN="top" | |
| 207 ><A | |
| 208 HREF="index.html" | |
|
803
355632dca928
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parents:
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209 ACCESSKEY="H" |
| 0 | 210 >Home</A |
| 211 ></TD | |
| 212 ><TD | |
| 213 WIDTH="33%" | |
| 214 ALIGN="right" | |
| 215 VALIGN="top" | |
| 216 ><A | |
| 217 HREF="guideaudioexamples.html" | |
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803
355632dca928
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Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
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218 ACCESSKEY="N" |
| 0 | 219 >Next</A |
| 220 ></TD | |
| 221 ></TR | |
| 222 ><TR | |
| 223 ><TD | |
| 224 WIDTH="33%" | |
| 225 ALIGN="left" | |
| 226 VALIGN="top" | |
|
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227 >Examples</TD |
| 0 | 228 ><TD |
| 229 WIDTH="34%" | |
| 230 ALIGN="center" | |
| 231 VALIGN="top" | |
| 232 ><A | |
| 233 HREF="guideexamples.html" | |
|
803
355632dca928
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Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
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234 ACCESSKEY="U" |
| 0 | 235 >Up</A |
| 236 ></TD | |
| 237 ><TD | |
| 238 WIDTH="33%" | |
| 239 ALIGN="right" | |
| 240 VALIGN="top" | |
| 241 >Audio Examples</TD | |
| 242 ></TR | |
| 243 ></TABLE | |
| 244 ></DIV | |
| 245 ></BODY | |
| 246 ></HTML | |
| 247 > |