Mercurial > sdl-ios-xcode
annotate include/SDL_cdrom.h @ 615:7ec821f3cbd0
Date: Thu, 17 Apr 2003 23:27:34 -0400
From: Darrell Walisser
Subject: Yet another OS X cursor bug
The synopsis:
1. Call SDL_ShowCursor(0);
2. Call SDL_SetVideoMode();
3. Call SDL_GetEvent();
3. Call SDL_ShowCursor(1);
The result: Sometimes the cursor doesn't come back! Ack! Oddly enough,
it does come back when mousing over the dock or clicking in the menu
bar. But that's besides the point.
The reason why this is happening is a flaw in the handling of
activation/deactivation events. The short explanation is that the
HideCursor() and ShowCursor() calls must be balanced, but if the cursor
was initially hidden, HideCursor() was called again on the activate
event - so now the next ShowCursor() fails (as does the next, and the
next, for some reason).
So, here's the patch. All it does is keep track of the
HideCursor()/ShowCursor() calls so that they will always be balanced.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 20 Apr 2003 05:41:16 +0000 |
| parents | 9154ec9ca3d2 |
| children | b8d311d90021 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2002
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 9 | |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* This is the CD-audio control API for Simple DirectMedia Layer */ | |
| 29 | |
| 30 #ifndef _SDL_cdrom_h | |
| 31 #define _SDL_cdrom_h | |
| 32 | |
| 33 #include "SDL_types.h" | |
| 34 | |
| 35 #include "begin_code.h" | |
| 36 /* Set up for C function definitions, even when using C++ */ | |
| 37 #ifdef __cplusplus | |
| 38 extern "C" { | |
| 39 #endif | |
| 40 | |
| 41 /* In order to use these functions, SDL_Init() must have been called | |
| 42 with the SDL_INIT_CDROM flag. This causes SDL to scan the system | |
| 43 for CD-ROM drives, and load appropriate drivers. | |
| 44 */ | |
| 45 | |
| 46 /* The maximum number of CD-ROM tracks on a disk */ | |
| 47 #define SDL_MAX_TRACKS 99 | |
| 48 | |
| 49 /* The types of CD-ROM track possible */ | |
| 50 #define SDL_AUDIO_TRACK 0x00 | |
| 51 #define SDL_DATA_TRACK 0x04 | |
| 52 | |
| 53 /* The possible states which a CD-ROM drive can be in. */ | |
| 54 typedef enum { | |
| 55 CD_TRAYEMPTY, | |
| 56 CD_STOPPED, | |
| 57 CD_PLAYING, | |
| 58 CD_PAUSED, | |
| 59 CD_ERROR = -1 | |
| 60 } CDstatus; | |
| 61 | |
| 62 /* Given a status, returns true if there's a disk in the drive */ | |
| 63 #define CD_INDRIVE(status) ((int)status > 0) | |
| 64 | |
| 65 typedef struct { | |
| 66 Uint8 id; /* Track number */ | |
| 67 Uint8 type; /* Data or audio track */ | |
| 68 Uint16 unused; | |
| 69 Uint32 length; /* Length, in frames, of this track */ | |
| 70 Uint32 offset; /* Offset, in frames, from start of disk */ | |
| 71 } SDL_CDtrack; | |
| 72 | |
| 73 /* This structure is only current as of the last call to SDL_CDStatus() */ | |
| 74 typedef struct SDL_CD { | |
| 75 int id; /* Private drive identifier */ | |
| 76 CDstatus status; /* Current drive status */ | |
| 77 | |
| 78 /* The rest of this structure is only valid if there's a CD in drive */ | |
| 79 int numtracks; /* Number of tracks on disk */ | |
| 80 int cur_track; /* Current track position */ | |
| 81 int cur_frame; /* Current frame offset within current track */ | |
| 82 SDL_CDtrack track[SDL_MAX_TRACKS+1]; | |
| 83 } SDL_CD; | |
| 84 | |
| 85 /* Conversion functions from frames to Minute/Second/Frames and vice versa */ | |
| 86 #define CD_FPS 75 | |
| 87 #define FRAMES_TO_MSF(f, M,S,F) { \ | |
| 88 int value = f; \ | |
| 89 *(F) = value%CD_FPS; \ | |
| 90 value /= CD_FPS; \ | |
| 91 *(S) = value%60; \ | |
| 92 value /= 60; \ | |
| 93 *(M) = value; \ | |
| 94 } | |
| 95 #define MSF_TO_FRAMES(M, S, F) ((M)*60*CD_FPS+(S)*CD_FPS+(F)) | |
| 96 | |
| 97 /* CD-audio API functions: */ | |
| 98 | |
| 99 /* Returns the number of CD-ROM drives on the system, or -1 if | |
| 100 SDL_Init() has not been called with the SDL_INIT_CDROM flag. | |
| 101 */ | |
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102 extern DECLSPEC int SDLCALL SDL_CDNumDrives(void); |
| 0 | 103 |
| 104 /* Returns a human-readable, system-dependent identifier for the CD-ROM. | |
| 105 Example: | |
| 106 "/dev/cdrom" | |
| 107 "E:" | |
| 108 "/dev/disk/ide/1/master" | |
| 109 */ | |
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110 extern DECLSPEC const char * SDLCALL SDL_CDName(int drive); |
| 0 | 111 |
| 112 /* Opens a CD-ROM drive for access. It returns a drive handle on success, | |
| 113 or NULL if the drive was invalid or busy. This newly opened CD-ROM | |
| 114 becomes the default CD used when other CD functions are passed a NULL | |
| 115 CD-ROM handle. | |
| 116 Drives are numbered starting with 0. Drive 0 is the system default CD-ROM. | |
| 117 */ | |
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118 extern DECLSPEC SDL_CD * SDLCALL SDL_CDOpen(int drive); |
| 0 | 119 |
| 120 /* This function returns the current status of the given drive. | |
| 121 If the drive has a CD in it, the table of contents of the CD and current | |
| 122 play position of the CD will be stored in the SDL_CD structure. | |
| 123 */ | |
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124 extern DECLSPEC CDstatus SDLCALL SDL_CDStatus(SDL_CD *cdrom); |
| 0 | 125 |
| 126 /* Play the given CD starting at 'start_track' and 'start_frame' for 'ntracks' | |
| 127 tracks and 'nframes' frames. If both 'ntrack' and 'nframe' are 0, play | |
| 128 until the end of the CD. This function will skip data tracks. | |
| 129 This function should only be called after calling SDL_CDStatus() to | |
| 130 get track information about the CD. | |
| 131 For example: | |
| 132 // Play entire CD: | |
| 133 if ( CD_INDRIVE(SDL_CDStatus(cdrom)) ) | |
| 134 SDL_CDPlayTracks(cdrom, 0, 0, 0, 0); | |
| 135 // Play last track: | |
| 136 if ( CD_INDRIVE(SDL_CDStatus(cdrom)) ) { | |
| 137 SDL_CDPlayTracks(cdrom, cdrom->numtracks-1, 0, 0, 0); | |
| 138 } | |
| 139 // Play first and second track and 10 seconds of third track: | |
| 140 if ( CD_INDRIVE(SDL_CDStatus(cdrom)) ) | |
| 141 SDL_CDPlayTracks(cdrom, 0, 0, 2, 10); | |
| 142 | |
| 143 This function returns 0, or -1 if there was an error. | |
| 144 */ | |
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145 extern DECLSPEC int SDLCALL SDL_CDPlayTracks(SDL_CD *cdrom, |
| 0 | 146 int start_track, int start_frame, int ntracks, int nframes); |
| 147 | |
| 148 /* Play the given CD starting at 'start' frame for 'length' frames. | |
| 149 It returns 0, or -1 if there was an error. | |
| 150 */ | |
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parents:
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151 extern DECLSPEC int SDLCALL SDL_CDPlay(SDL_CD *cdrom, int start, int length); |
| 0 | 152 |
| 153 /* Pause play -- returns 0, or -1 on error */ | |
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154 extern DECLSPEC int SDLCALL SDL_CDPause(SDL_CD *cdrom); |
| 0 | 155 |
| 156 /* Resume play -- returns 0, or -1 on error */ | |
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157 extern DECLSPEC int SDLCALL SDL_CDResume(SDL_CD *cdrom); |
| 0 | 158 |
| 159 /* Stop play -- returns 0, or -1 on error */ | |
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160 extern DECLSPEC int SDLCALL SDL_CDStop(SDL_CD *cdrom); |
| 0 | 161 |
| 162 /* Eject CD-ROM -- returns 0, or -1 on error */ | |
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163 extern DECLSPEC int SDLCALL SDL_CDEject(SDL_CD *cdrom); |
| 0 | 164 |
| 165 /* Closes the handle for the CD-ROM drive */ | |
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166 extern DECLSPEC void SDLCALL SDL_CDClose(SDL_CD *cdrom); |
| 0 | 167 |
| 168 | |
| 169 /* Ends C function definitions when using C++ */ | |
| 170 #ifdef __cplusplus | |
| 171 } | |
| 172 #endif | |
| 173 #include "close_code.h" | |
| 174 | |
| 175 #endif /* _SDL_video_h */ |