Mercurial > sdl-ios-xcode
annotate src/timer/macos/SDL_MPWtimer.c @ 1554:0ca607a5d173
Fixed bug #84
Date: Sun, 23 Oct 2005 16:39:03 +0200
From: "A. Schmid" <sahib@phreaker.net>
Subject: [SDL] no software surfaces with svgalib driver?
Hi,
I noticed that the SDL (1.2.9) svgalib driver only makes use of linear
addressable (framebuffer) video modes. On older systems (like one of
mine), linear addressable modes are often not available.
Especially for cards with VESA VBE < 2.0 the svgalib vesa driver is
unusable, since VESA only supports framebuffering for VBE 2.0 and later.
The changes necessary to add support for software surfaces seem to be
relatively small. I only had to hack src/video/svga/SDL_svgavideo.c (see
attached patch). The code worked fine for me, but it is no more than a
proof of concept and should be reviewed (probably has a memory leak when
switching modes). It also uses the vgagl library (included in the
svgalib package) and needs to be linked against it.
-Alex
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 19 Mar 2006 12:04:40 +0000 |
| parents | d910939febfa |
| children | 92947e3a18db |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
2 SDL - Simple DirectMedia Layer |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
5 This library is free software; you can redistribute it and/or |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
6 modify it under the terms of the GNU Lesser General Public |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
7 License as published by the Free Software Foundation; either |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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10 This library is distributed in the hope that it will be useful, |
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c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
13 Lesser General Public License for more details. |
| 0 | 14 |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
15 You should have received a copy of the GNU Lesser General Public |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
16 License along with this library; if not, write to the Free Software |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
19 Sam Lantinga |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
20 slouken@libsdl.org |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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21 */ |
|
1402
d910939febfa
Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents:
1361
diff
changeset
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 #include <Types.h> | |
| 25 #include <Timer.h> | |
| 26 #include <OSUtils.h> | |
| 27 #include <Gestalt.h> | |
| 28 #include <Processes.h> | |
| 29 | |
| 30 #include <LowMem.h> | |
| 31 | |
| 32 #include "SDL_timer.h" | |
|
1361
19418e4422cb
New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
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33 #include "../SDL_timer_c.h" |
| 0 | 34 |
| 35 #define MS_PER_TICK (1000/60) /* MacOS tick = 1/60 second */ | |
| 36 | |
| 37 /* Note: This is only a step above the original 1/60s implementation. | |
| 38 * For a good implementation, see FastTimes.[ch], by Matt Slot. | |
| 39 */ | |
| 40 #define USE_MICROSECONDS | |
| 41 #define WideTo64bit(w) (*(UInt64 *) &(w)) | |
| 42 | |
| 43 UInt64 start; | |
| 44 | |
| 45 void SDL_StartTicks(void) | |
| 46 { | |
| 47 #ifdef USE_MICROSECONDS | |
| 48 UnsignedWide now; | |
| 49 | |
| 50 Microseconds(&now); | |
| 51 start = WideTo64bit(now); | |
| 52 #else | |
| 53 /* FIXME: Should we implement a wrapping algorithm, like Win32? */ | |
| 54 #endif | |
| 55 } | |
| 56 | |
| 57 Uint32 SDL_GetTicks(void) | |
| 58 { | |
| 59 #ifdef USE_MICROSECONDS | |
| 60 UnsignedWide now; | |
| 61 | |
| 62 Microseconds(&now); | |
| 63 return (Uint32)((WideTo64bit(now)-start)/1000); | |
| 64 #else | |
| 65 return(LMGetTicks()*MS_PER_TICK); | |
| 66 #endif | |
| 67 } | |
| 68 | |
| 69 void SDL_Delay(Uint32 ms) | |
| 70 { | |
| 71 #ifdef USE_MICROSECONDS | |
| 72 Uint32 end_ms; | |
| 73 | |
| 74 end_ms = SDL_GetTicks() + ms; | |
| 75 do { | |
| 76 /* FIXME: Yield CPU? */ ; | |
| 77 } while ( SDL_GetTicks() < end_ms ); | |
| 78 #else | |
| 79 UInt32 unused; /* MJS */ | |
| 80 Delay(ms/MS_PER_TICK, &unused); | |
| 81 #endif | |
| 82 } | |
| 83 | |
| 84 | |
| 85 /* Data to handle a single periodic alarm */ | |
| 86 typedef struct _ExtendedTimerRec | |
| 87 { | |
| 88 TMTask tmTask; | |
| 89 ProcessSerialNumber taskPSN; | |
| 90 } ExtendedTimerRec, *ExtendedTimerPtr; | |
| 91 | |
| 92 static ExtendedTimerRec gExtendedTimerRec; | |
| 93 | |
| 94 | |
| 95 int SDL_SYS_TimerInit(void) | |
| 96 { | |
| 97 /* We don't need a setup? */ | |
| 98 return(0); | |
| 99 } | |
| 100 | |
| 101 void SDL_SYS_TimerQuit(void) | |
| 102 { | |
| 103 /* We don't need a cleanup? */ | |
| 104 return; | |
| 105 } | |
| 106 | |
| 107 /* Our Stub routine to set up and then call the real routine. */ | |
| 108 pascal void TimerCallbackProc(TMTaskPtr tmTaskPtr) | |
| 109 { | |
| 110 Uint32 ms; | |
| 111 | |
| 112 WakeUpProcess(&((ExtendedTimerPtr) tmTaskPtr)->taskPSN); | |
| 113 | |
| 114 ms = SDL_alarm_callback(SDL_alarm_interval); | |
| 115 if ( ms ) { | |
| 116 SDL_alarm_interval = ROUND_RESOLUTION(ms); | |
| 117 PrimeTime((QElemPtr)&gExtendedTimerRec.tmTask, | |
| 118 SDL_alarm_interval); | |
| 119 } else { | |
| 120 SDL_alarm_interval = 0; | |
| 121 } | |
| 122 } | |
| 123 | |
| 124 int SDL_SYS_StartTimer(void) | |
| 125 { | |
| 126 /* | |
| 127 * Configure the global structure that stores the timing information. | |
| 128 */ | |
| 129 gExtendedTimerRec.tmTask.qLink = NULL; | |
| 130 gExtendedTimerRec.tmTask.qType = 0; | |
| 131 gExtendedTimerRec.tmTask.tmAddr = NewTimerUPP(TimerCallbackProc); | |
| 132 gExtendedTimerRec.tmTask.tmCount = 0; | |
| 133 gExtendedTimerRec.tmTask.tmWakeUp = 0; | |
| 134 gExtendedTimerRec.tmTask.tmReserved = 0; | |
| 135 GetCurrentProcess(&gExtendedTimerRec.taskPSN); | |
| 136 | |
| 137 /* Install the task record */ | |
| 138 InsXTime((QElemPtr)&gExtendedTimerRec.tmTask); | |
| 139 | |
| 140 /* Go! */ | |
| 141 PrimeTime((QElemPtr)&gExtendedTimerRec.tmTask, SDL_alarm_interval); | |
| 142 return(0); | |
| 143 } | |
| 144 | |
| 145 void SDL_SYS_StopTimer(void) | |
| 146 { | |
| 147 RmvTime((QElemPtr)&gExtendedTimerRec.tmTask); | |
| 148 } |