Mercurial > sdl-ios-xcode
annotate src/thread/amigaos/SDL_systhread.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 | 782fd950bd46 c121d94672cb |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
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24 /* BeOS thread management routines for SDL */ |
| 0 | 25 |
| 26 #include "SDL_mutex.h" | |
| 27 #include "SDL_thread.h" | |
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28 #include "../SDL_thread_c.h" |
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29 #include "../SDL_systhread.h" |
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30 #include "mydebug.h" |
| 0 | 31 |
| 32 typedef struct { | |
| 33 int (*func)(void *); | |
| 34 void *data; | |
| 35 SDL_Thread *info; | |
| 36 struct Task *wait; | |
| 37 } thread_args; | |
| 38 | |
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39 #ifndef MORPHOS |
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40 |
| 0 | 41 #if defined(__SASC) && !defined(__PPC__) |
| 42 __saveds __asm Uint32 RunThread(register __a0 char *args ) | |
| 43 #elif defined(__PPC__) | |
| 44 Uint32 RunThread(char *args) | |
| 45 #else | |
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46 Uint32 __saveds RunThread(char *args __asm("a0") ) |
| 0 | 47 #endif |
| 48 { | |
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49 #ifdef STORMC4_WOS |
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50 thread_args *data=(thread_args *)args; |
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51 #else |
| 0 | 52 thread_args *data=(thread_args *)atol(args); |
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53 #endif |
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54 |
| 0 | 55 struct Task *Father; |
| 56 | |
| 57 D(bug("Received data: %lx\n",data)); | |
| 58 Father=data->wait; | |
| 59 | |
| 60 SDL_RunThread(data); | |
| 61 | |
| 62 Signal(Father,SIGBREAKF_CTRL_F); | |
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63 D(bug("Thread with data %lx ended\n",data)); |
| 0 | 64 return(0); |
| 65 } | |
| 66 | |
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67 #else |
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68 |
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69 #include <emul/emulinterface.h> |
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70 |
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71 Uint32 RunTheThread(void) |
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72 { |
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73 thread_args *data=(thread_args *)atol((char *)REG_A0); |
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74 struct Task *Father; |
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75 |
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76 D(bug("Received data: %lx\n",data)); |
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77 Father=data->wait; |
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78 |
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79 SDL_RunThread(data); |
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80 |
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81 Signal(Father,SIGBREAKF_CTRL_F); |
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82 D(bug("Thread with data %lx ended\n",data)); |
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83 return(0); |
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84 } |
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85 |
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86 struct EmulLibEntry RunThreadStruct= |
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87 { |
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88 TRAP_LIB, |
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89 0, |
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90 (ULONG)RunTheThread |
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91 }; |
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92 |
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93 void *RunThread=&RunThreadStruct; |
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94 #endif |
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95 |
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96 |
| 0 | 97 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args) |
| 98 { | |
| 99 /* Create the thread and go! */ | |
| 100 char buffer[20]; | |
| 101 | |
| 102 D(bug("Sending %lx to the new thread...\n",args)); | |
| 103 | |
| 104 if(args) | |
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105 SDL_snprintf(buffer, SDL_arraysize(buffer),"%ld",args); |
| 0 | 106 |
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107 #ifdef STORMC4_WOS |
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108 thread->handle=CreateTaskPPCTags(TASKATTR_CODE, RunThread, |
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109 TASKATTR_NAME, "SDL subtask", |
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110 TASKATTR_STACKSIZE, 100000, |
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111 (args ? TASKATTR_R3 : TAG_IGNORE), args, |
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112 TASKATTR_INHERITR2, TRUE, |
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113 TAG_DONE); |
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114 #else |
| 0 | 115 thread->handle=(struct Task *)CreateNewProcTags(NP_Output,Output(), |
| 116 NP_Name,(ULONG)"SDL subtask", | |
| 117 NP_CloseOutput, FALSE, | |
| 118 NP_StackSize,20000, | |
| 119 NP_Entry,(ULONG)RunThread, | |
| 120 args ? NP_Arguments : TAG_IGNORE,(ULONG)buffer, | |
| 121 TAG_DONE); | |
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122 #endif |
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123 |
| 0 | 124 if(!thread->handle) |
| 125 { | |
| 126 SDL_SetError("Not enough resources to create thread"); | |
| 127 return(-1); | |
| 128 } | |
| 129 | |
| 130 return(0); | |
| 131 } | |
| 132 | |
| 133 void SDL_SYS_SetupThread(void) | |
| 134 { | |
| 135 } | |
| 136 | |
| 137 Uint32 SDL_ThreadID(void) | |
| 138 { | |
| 139 return((Uint32)FindTask(NULL)); | |
| 140 } | |
| 141 | |
| 142 void SDL_SYS_WaitThread(SDL_Thread *thread) | |
| 143 { | |
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144 SetSignal(0L,SIGBREAKF_CTRL_F|SIGBREAKF_CTRL_C); |
| 0 | 145 Wait(SIGBREAKF_CTRL_F|SIGBREAKF_CTRL_C); |
| 146 } | |
| 147 | |
| 148 void SDL_SYS_KillThread(SDL_Thread *thread) | |
| 149 { | |
| 150 Signal((struct Task *)thread->handle,SIGBREAKF_CTRL_C); | |
| 151 } |