| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 Sam Lantinga |
| 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 |
| 20 | slouken@libsdl.org |
| 21 | */ |
| 22 | #include "SDL_config.h" |
| 23 | |
| 24 | /* |
| 25 | This file added by Alan Buckley (alan_baa@hotmail.com) to support RISC OS |
| 26 | 26 March 2003 |
| 27 | |
| 28 | File includes routines for: |
| 29 | Setting up as a WIMP Task |
| 30 | Reading information about the current desktop |
| 31 | Storing information before a switch to full screen |
| 32 | Restoring desktop after switching to full screen |
| 33 | */ |
| 34 | |
| 35 | #include "kernel.h" |
| 36 | #include "swis.h" |
| 37 | |
| 38 | #include "SDL_stdinc.h" |
| 39 | #include "SDL_riscostask.h" |
| 40 | |
| 41 | #if !SDL_THREADS_DISABLED |
| 42 | #include <pthread.h> |
| 43 | pthread_t main_thread; |
| 44 | #endif |
| 45 | |
| 46 | /* RISC OS variables */ |
| 47 | |
| 48 | static int task_handle = 0; |
| 49 | static int wimp_version = 0; |
| 50 | |
| 51 | /* RISC OS variables to help compatability with certain programs */ |
| 52 | int riscos_backbuffer = 0; /* Create a back buffer in system memory for full screen mode */ |
| 53 | int riscos_closeaction = 1; /* Close icon action */ |
| 54 | |
| 55 | static int stored_mode = -1; /* -1 when in desktop, mode number or pointer when full screen */ |
| 56 | |
| 57 | extern int mouseInWindow; /* Mouse is in WIMP window */ |
| 58 | |
| 59 | /* Local function */ |
| 60 | |
| 61 | static int RISCOS_GetTaskName(char *task_name, size_t maxlen); |
| 62 | |
| 63 | /* Uncomment next line to copy mode changes/restores to stderr */ |
| 64 | /* #define DUMP_MODE */ |
| 65 | #ifdef DUMP_MODE |
| 66 | #include "stdio.h" |
| 67 | static void dump_mode() |
| 68 | { |
| 69 | fprintf(stderr, "mode %d\n", stored_mode); |
| 70 | if (stored_mode < -1 || stored_mode >= 256) |
| 71 | { |
| 72 | int blockSize = 0; |
| 73 | int *storeBlock = (int *)stored_mode; |
| 74 | |
| 75 | while(blockSize < 5 || storeBlock[blockSize] != -1) |
| 76 | { |
| 77 | fprintf(stderr, " %d\n", storeBlock[blockSize++]); |
| 78 | } |
| 79 | } |
| 80 | } |
| 81 | #endif |
| 82 | |
| 83 | /****************************************************************** |
| 84 | |
| 85 | Initialise as RISC OS Wimp task |
| 86 | |
| 87 | *******************************************************************/ |
| 88 | |
| 89 | int RISCOS_InitTask() |
| 90 | { |
| 91 | char task_name[32]; |
| 92 | _kernel_swi_regs regs; |
| 93 | int messages[4]; |
| 94 | |
| 95 | if (RISCOS_GetTaskName(task_name, SDL_arraysize(task_name)) == 0) return 0; |
| 96 | |
| 97 | messages[0] = 9; /* Palette changed */ |
| 98 | messages[1] = 0x400c1; /* Mode changed */ |
| 99 | messages[2] = 8; /* Pre quit */ |
| 100 | messages[2] = 0; |
| 101 | |
| 102 | regs.r[0] = (unsigned int)360; /* Minimum version 3.6 */ |
| 103 | regs.r[1] = (unsigned int)0x4b534154; |
| 104 | regs.r[2] = (unsigned int)task_name; |
| 105 | regs.r[3] = (unsigned int)messages; |
| 106 | |
| 107 | if (_kernel_swi(Wimp_Initialise, ®s, ®s) == 0) |
| 108 | { |
| 109 | wimp_version = regs.r[0]; |
| 110 | task_handle = regs.r[1]; |
| 111 | return 1; |
| 112 | } |
| 113 | |
| 114 | #if !SDL_THREADS_DISABLED |
| 115 | main_thread = pthread_self(); |
| 116 | #endif |
| 117 | |
| 118 | return 0; |
| 119 | } |
| 120 | |
| 121 | /********************************************************************* |
| 122 | |
| 123 | Close down application on exit. |
| 124 | |
| 125 | **********************************************************************/ |
| 126 | |
| 127 | void RISCOS_ExitTask() |
| 128 | { |
| 129 | _kernel_swi_regs regs; |
| 130 | |
| 131 | if (stored_mode == -1) |
| 132 | { |
| 133 | /* Ensure cursor is put back to standard pointer shape if |
| 134 | we have been running in a window */ |
| 135 | _kernel_osbyte(106,1,0); |
| 136 | } |
| 137 | |
| 138 | /* Ensure we end up back in the wimp */ |
| 139 | RISCOS_RestoreWimpMode(); |
| 140 | |
| 141 | /* Neatly exit the task */ |
| 142 | regs.r[0] = task_handle; |
| 143 | regs.r[1] = (unsigned int)0x4b534154; |
| 144 | _kernel_swi(Wimp_CloseDown, ®s, ®s); |
| 145 | task_handle = 0; |
| 146 | } |
| 147 | |
| 148 | /************************************************************************** |
| 149 | |
| 150 | Get the name of the task for the desktop. |
| 151 | |
| 152 | Param: task_name - name of task 32 characters. |
| 153 | |
| 154 | Returns: 1 is successful, otherwise 0 |
| 155 | |
| 156 | Notes: Works by getting using OS_GetEnv to get the command line |
| 157 | used to run the program and then parsing a name from it |
| 158 | as follows. |
| 159 | |
| 160 | 1. Use name after final period if not !RunImage |
| 161 | 2. If name is !RunImage then process item before the period |
| 162 | in front of !RunImage. |
| 163 | 3. If directory name use that |
| 164 | 4. if in form <XXX$Dir> use the XXX. |
| 165 | |
| 166 | Finally once this value has been retrieved use it unless |
| 167 | there is a variable set up in the form SDL$<name>$TaskName |
| 168 | in which case the value of this variable will be used. |
| 169 | |
| 170 | Now also gets other RISC OS configuration varibles |
| 171 | SDL$<name>$BackBuffer - set to 1 to use a system memory backbuffer in fullscreen mode |
| 172 | so updates wait until a call to SDL_UpdateRects. (default 0) |
| 173 | This is required for programmes where they have assumed this is |
| 174 | always the case which is contrary to the documentation. |
| 175 | SDL$<name>$CloseAction |
| 176 | 0 Don't show close icon |
| 177 | 1 Show close icon |
| 178 | |
| 179 | ***************************************************************************/ |
| 180 | |
| 181 | int RISCOS_GetTaskName(char *task_name, size_t maxlen) |
| 182 | { |
| 183 | _kernel_swi_regs regs; |
| 184 | |
| 185 | task_name[0] = 0; |
| 186 | |
| 187 | /* Figure out a sensible task name */ |
| 188 | if (_kernel_swi(OS_GetEnv, ®s, ®s) == 0) |
| 189 | { |
| 190 | char *command_line = (char *)regs.r[0]; |
| 191 | size_t len = SDL_strlen(command_line)+1; |
| 192 | char *buffer = SDL_stack_alloc(char, len); |
| 193 | char *env_var; |
| 194 | char *p; |
| 195 | |
| 196 | SDL_strlcpy(buffer, command_line, len); |
| 197 | p = SDL_strchr(buffer, ' '); |
| 198 | if (p) *p = 0; |
| 199 | p = SDL_strrchr(buffer, '.'); |
| 200 | if (p == 0) p = buffer; |
| 201 | if (stricmp(p+1,"!RunImage") == 0) |
| 202 | { |
| 203 | *p = 0; |
| 204 | p = SDL_strrchr(buffer, '.'); |
| 205 | if (p == 0) p = buffer; |
| 206 | } |
| 207 | if (*p == '.') p++; |
| 208 | if (*p == '!') p++; /* Skip "!" at beginning of application directories */ |
| 209 | |
| 210 | if (*p == '<') |
| 211 | { |
| 212 | // Probably in the form <appname$Dir> |
| 213 | char *q = SDL_strchr(p, '$'); |
| 214 | if (q == 0) q = SDL_strchr(p,'>'); /* Use variable name if not */ |
| 215 | if (q) *q = 0; |
| 216 | p++; /* Move over the < */ |
| 217 | } |
| 218 | |
| 219 | if (*p) |
| 220 | { |
| 221 | /* Read variables that effect the RISC OS SDL engine for this task */ |
| 222 | len = SDL_strlen(p) + 18; /* 18 is larger than the biggest variable name */ |
| 223 | env_var = SDL_stack_alloc(char, len); |
| 224 | if (env_var) |
| 225 | { |
| 226 | char *env_val; |
| 227 | |
| 228 | /* See if a variable of form SDL$<dirname>$TaskName exists */ |
| 229 | |
| 230 | SDL_strlcpy(env_var, "SDL$", len); |
| 231 | SDL_strlcat(env_var, p, len); |
| 232 | SDL_strlcat(env_var, "$TaskName", len); |
| 233 | |
| 234 | env_val = SDL_getenv(env_var); |
| 235 | if (env_val) SDL_strlcpy(task_name, env_val, maxlen); |
| 236 | |
| 237 | SDL_strlcpy(env_var, "SDL$", len); |
| 238 | SDL_strlcat(env_var, p, len); |
| 239 | SDL_strlcat(env_var, "$BackBuffer", len); |
| 240 | |
| 241 | env_val = SDL_getenv(env_var); |
| 242 | if (env_val) riscos_backbuffer = atoi(env_val); |
| 243 | |
| 244 | SDL_strlcpy(env_var, "SDL$", len); |
| 245 | SDL_strlcat(env_var, p, len); |
| 246 | SDL_strlcat(env_var, "$CloseAction", len); |
| 247 | |
| 248 | env_val = SDL_getenv(env_var); |
| 249 | if (env_val && SDL_strcmp(env_val,"0") == 0) riscos_closeaction = 0; |
| 250 | |
| 251 | SDL_stack_free(env_var); |
| 252 | } |
| 253 | |
| 254 | if (!*task_name) SDL_strlcpy(task_name, p, maxlen); |
| 255 | } |
| 256 | |
| 257 | SDL_stack_free(buffer); |
| 258 | } |
| 259 | |
| 260 | if (task_name[0] == 0) SDL_strlcpy(task_name, "SDL Task", maxlen); |
| 261 | |
| 262 | return 1; |
| 263 | } |
| 264 | |
| 265 | /***************************************************************** |
| 266 | |
| 267 | Store the current desktop screen mode if we are in the desktop. |
| 268 | |
| 269 | ******************************************************************/ |
| 270 | |
| 271 | void RISCOS_StoreWimpMode() |
| 272 | { |
| 273 | _kernel_swi_regs regs; |
| 274 | |
| 275 | /* Don't store if in full screen mode */ |
| 276 | if (stored_mode != -1) return; |
| 277 | |
| 278 | regs.r[0] = 1; |
| 279 | _kernel_swi(OS_ScreenMode, ®s, ®s); |
| 280 | if (regs.r[1] >= 0 && regs.r[1] < 256) stored_mode = regs.r[1]; |
| 281 | else |
| 282 | { |
| 283 | int blockSize = 0; |
| 284 | int *retBlock = (int *)regs.r[1]; |
| 285 | int *storeBlock; |
| 286 | int j; |
| 287 | |
| 288 | while(blockSize < 5 || retBlock[blockSize] != -1) blockSize++; |
| 289 | blockSize++; |
| 290 | storeBlock = (int *)SDL_malloc(blockSize * sizeof(int)); |
| 291 | retBlock = (int *)regs.r[1]; |
| 292 | for ( j = 0; j < blockSize; j++) |
| 293 | storeBlock[j] = retBlock[j]; |
| 294 | |
| 295 | stored_mode = (int)storeBlock; |
| 296 | } |
| 297 | #if DUMP_MODE |
| 298 | fprintf(stderr, "Stored "); dump_mode(); |
| 299 | #endif |
| 300 | } |
| 301 | |
| 302 | /***************************************************************** |
| 303 | |
| 304 | Restore desktop screen mode if we are in full screen mode. |
| 305 | |
| 306 | *****************************************************************/ |
| 307 | |
| 308 | void RISCOS_RestoreWimpMode() |
| 309 | { |
| 310 | _kernel_swi_regs regs; |
| 311 | |
| 312 | /* Only need to restore if we are in full screen mode */ |
| 313 | if (stored_mode == -1) return; |
| 314 | |
| 315 | #if DUMP_MODE |
| 316 | fprintf(stderr, "Restored"); dump_mode(); |
| 317 | #endif |
| 318 | |
| 319 | regs.r[0] = stored_mode; |
| 320 | _kernel_swi(Wimp_SetMode, ®s, ®s); |
| 321 | if (stored_mode < 0 || stored_mode > 256) |
| 322 | { |
| 323 | SDL_free((int *)stored_mode); |
| 324 | } |
| 325 | stored_mode = -1; |
| 326 | |
| 327 | /* Flush keyboard buffer to dump the keystrokes we've already polled */ |
| 328 | regs.r[0] = 21; |
| 329 | regs.r[1] = 0; /* Keyboard buffer number */ |
| 330 | _kernel_swi(OS_Byte, ®s, ®s); |
| 331 | |
| 332 | mouseInWindow = 0; |
| 333 | |
| 334 | } |
| 335 | |
| 336 | /********************************************************************* |
| 337 | |
| 338 | Get version of Wimp running when task was initialised. |
| 339 | |
| 340 | *********************************************************************/ |
| 341 | |
| 342 | int RISCOS_GetWimpVersion() |
| 343 | { |
| 344 | return wimp_version; |
| 345 | } |
| 346 | |
| 347 | int RISCOS_GetTaskHandle() |
| 348 | { |
| 349 | return task_handle; |
| 350 | } |