Mercurial > sdl-ios-xcode
annotate test/checkkeys.c @ 883:50f5a29c6a17
Date: Sat, 10 Apr 2004 02:25:33 -0400
From: Glenn Maynard
To: sdl@libsdl.org
Subject: [SDL] SDL_SetVideoMode() failing and not setting an error (patch)
Running an OpenGL SDL application off 1.2.7, at SDL_InitSubSystem(SDL_INIT_VIDEO) time:
Warning: Unable to initialize AAlib mouseUsing AAlib driver: Slang driver 1.0 (slang)
SDL_SetVideoMode then fails; SDL_GetError() returns "".
The installation problem is straightforward: X (the higher priority
driver) isn't running, so SDL is falling back on aalib. However,
no error is being set when aalib fails to initialize. This also
happens with the svgalib driver.
SDL_video.c line ~653 sets mode to NULL, since aalib didn't return an
OpenGL surface. Line ~711 ("failed setting a video mode") returns NULL.
The attached patch sets an error. It's a horrible, useless error
message--it should really say eg. "aalib does not support OpenGL"; this
should probably be done earlier in the individual drivers, too.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 11 Apr 2004 19:54:40 +0000 |
| parents | 806fcbde0af3 |
| children | be9c9c8f6d53 |
| rev | line source |
|---|---|
| 0 | 1 |
| 2 /* Simple program: Loop, watching keystrokes | |
| 3 Note that you need to call SDL_PollEvent() or SDL_WaitEvent() to | |
| 4 pump the event loop and catch keystrokes. | |
| 5 */ | |
| 6 | |
| 7 #include <stdio.h> | |
| 8 #include <stdlib.h> | |
| 9 #include <string.h> | |
| 10 | |
| 11 #include "SDL.h" | |
| 12 | |
| 13 static void print_modifiers(void) | |
| 14 { | |
| 15 int mod; | |
| 16 printf(" modifiers:"); | |
| 17 mod = SDL_GetModState(); | |
| 18 if(!mod) { | |
| 19 printf(" (none)"); | |
| 20 return; | |
| 21 } | |
| 22 if(mod & KMOD_LSHIFT) | |
| 23 printf(" LSHIFT"); | |
| 24 if(mod & KMOD_RSHIFT) | |
| 25 printf(" RSHIFT"); | |
| 26 if(mod & KMOD_LCTRL) | |
| 27 printf(" LCTRL"); | |
| 28 if(mod & KMOD_RCTRL) | |
| 29 printf(" RCTRL"); | |
| 30 if(mod & KMOD_LALT) | |
| 31 printf(" LALT"); | |
| 32 if(mod & KMOD_RALT) | |
| 33 printf(" RALT"); | |
| 34 if(mod & KMOD_LMETA) | |
| 35 printf(" LMETA"); | |
| 36 if(mod & KMOD_RMETA) | |
| 37 printf(" RMETA"); | |
| 38 if(mod & KMOD_NUM) | |
| 39 printf(" NUM"); | |
| 40 if(mod & KMOD_CAPS) | |
| 41 printf(" CAPS"); | |
| 42 if(mod & KMOD_MODE) | |
| 43 printf(" MODE"); | |
| 44 } | |
| 45 | |
| 46 static void PrintKey(SDL_keysym *sym, int pressed) | |
| 47 { | |
| 48 /* Print the keycode, name and state */ | |
| 49 if ( sym->sym ) { | |
| 50 printf("Key %s: %d-%s ", pressed ? "pressed" : "released", | |
| 51 sym->sym, SDL_GetKeyName(sym->sym)); | |
| 52 } else { | |
| 53 printf("Unknown Key (scancode = %d) %s ", sym->scancode, | |
| 54 pressed ? "pressed" : "released"); | |
| 55 } | |
| 56 | |
| 57 /* Print the translated character, if one exists */ | |
| 58 if ( sym->unicode ) { | |
| 59 /* Is it a control-character? */ | |
| 60 if ( sym->unicode < ' ' ) { | |
| 61 printf(" (^%c)", sym->unicode+'@'); | |
| 62 } else { | |
| 63 #ifdef UNICODE | |
| 64 printf(" (%c)", sym->unicode); | |
| 65 #else | |
| 66 /* This is a Latin-1 program, so only show 8-bits */ | |
| 67 if ( !(sym->unicode & 0xFF00) ) | |
| 68 printf(" (%c)", sym->unicode); | |
| 69 #endif | |
| 70 } | |
| 71 } | |
| 72 print_modifiers(); | |
| 73 printf("\n"); | |
| 74 } | |
| 75 | |
| 76 int main(int argc, char *argv[]) | |
| 77 { | |
| 78 SDL_Event event; | |
| 79 int done; | |
| 473 | 80 Uint32 videoflags; |
| 0 | 81 |
| 82 /* Initialize SDL */ | |
| 83 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { | |
| 84 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); | |
| 85 exit(1); | |
| 86 } | |
| 87 atexit(SDL_Quit); | |
| 88 | |
| 473 | 89 videoflags = SDL_SWSURFACE; |
|
493
806fcbde0af3
Fixed a crash bug in checkkeys.c (thanks John!)
Sam Lantinga <slouken@libsdl.org>
parents:
473
diff
changeset
|
90 while( argc > 1 ) { |
|
806fcbde0af3
Fixed a crash bug in checkkeys.c (thanks John!)
Sam Lantinga <slouken@libsdl.org>
parents:
473
diff
changeset
|
91 --argc; |
|
806fcbde0af3
Fixed a crash bug in checkkeys.c (thanks John!)
Sam Lantinga <slouken@libsdl.org>
parents:
473
diff
changeset
|
92 if ( argv[argc] && !strcmp(argv[argc], "-fullscreen") ) { |
|
806fcbde0af3
Fixed a crash bug in checkkeys.c (thanks John!)
Sam Lantinga <slouken@libsdl.org>
parents:
473
diff
changeset
|
93 videoflags |= SDL_FULLSCREEN; |
|
806fcbde0af3
Fixed a crash bug in checkkeys.c (thanks John!)
Sam Lantinga <slouken@libsdl.org>
parents:
473
diff
changeset
|
94 } else { |
|
806fcbde0af3
Fixed a crash bug in checkkeys.c (thanks John!)
Sam Lantinga <slouken@libsdl.org>
parents:
473
diff
changeset
|
95 fprintf(stderr, "Usage: %s [-fullscreen]\n", argv[0]); |
|
806fcbde0af3
Fixed a crash bug in checkkeys.c (thanks John!)
Sam Lantinga <slouken@libsdl.org>
parents:
473
diff
changeset
|
96 exit(1); |
|
806fcbde0af3
Fixed a crash bug in checkkeys.c (thanks John!)
Sam Lantinga <slouken@libsdl.org>
parents:
473
diff
changeset
|
97 } |
| 473 | 98 } |
| 99 | |
| 0 | 100 /* Set 640x480 video mode */ |
| 473 | 101 if ( SDL_SetVideoMode(640, 480, 0, videoflags) == NULL ) { |
| 0 | 102 fprintf(stderr, "Couldn't set 640x480 video mode: %s\n", |
| 103 SDL_GetError()); | |
| 104 exit(2); | |
| 105 } | |
| 106 | |
| 107 /* Enable UNICODE translation for keyboard input */ | |
| 108 SDL_EnableUNICODE(1); | |
| 109 | |
| 110 /* Enable auto repeat for keyboard input */ | |
| 111 SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, | |
| 112 SDL_DEFAULT_REPEAT_INTERVAL); | |
| 113 | |
| 114 /* Watch keystrokes */ | |
| 115 done = 0; | |
| 116 while ( !done ) { | |
| 117 /* Check for events */ | |
| 118 SDL_WaitEvent(&event); | |
| 119 switch (event.type) { | |
| 120 case SDL_KEYDOWN: | |
| 121 PrintKey(&event.key.keysym, 1); | |
| 122 break; | |
| 123 case SDL_KEYUP: | |
| 124 PrintKey(&event.key.keysym, 0); | |
| 125 break; | |
| 126 case SDL_MOUSEBUTTONDOWN: | |
| 127 /* Any button press quits the app... */ | |
| 128 case SDL_QUIT: | |
| 129 done = 1; | |
| 130 break; | |
| 131 default: | |
| 132 break; | |
| 133 } | |
| 134 } | |
| 135 return(0); | |
| 136 } |