| 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 | File added by Alan Buckley (alan_baa@hotmail.com) for RISC OS compatability |
| 26 | 27 March 2003 |
| 27 | |
| 28 | Implements RISC OS Wimp display. |
| 29 | */ |
| 30 | |
| 31 | #include "SDL_video.h" |
| 32 | #include "SDL_mouse.h" |
| 33 | #include "../SDL_sysvideo.h" |
| 34 | #include "../SDL_pixels_c.h" |
| 35 | #include "../../events/SDL_events_c.h" |
| 36 | |
| 37 | #include "SDL_riscostask.h" |
| 38 | #include "SDL_riscosvideo.h" |
| 39 | #include "SDL_riscosevents_c.h" |
| 40 | #include "SDL_riscosmouse_c.h" |
| 41 | |
| 42 | #include "kernel.h" |
| 43 | #include "swis.h" |
| 44 | |
| 45 | /* Initialization/Query functions */ |
| 46 | SDL_Rect **WIMP_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); |
| 47 | SDL_Surface *WIMP_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); |
| 48 | int WIMP_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors); |
| 49 | void WIMP_SetWMCaption(_THIS, const char *title, const char *icon); |
| 50 | |
| 51 | |
| 52 | extern unsigned char *WIMP_CreateBuffer(int width, int height, int bpp); |
| 53 | extern void WIMP_PumpEvents(_THIS); |
| 54 | extern void WIMP_PlotSprite(_THIS, int x, int y); |
| 55 | extern void WIMP_SetupPlotInfo(_THIS); |
| 56 | extern void WIMP_SetFocus(int win); |
| 57 | |
| 58 | /* etc. */ |
| 59 | static void WIMP_UpdateRects(_THIS, int numrects, SDL_Rect *rects); |
| 60 | |
| 61 | /* RISC OS Wimp handling helpers */ |
| 62 | void WIMP_ReadModeInfo(_THIS); |
| 63 | unsigned int WIMP_SetupWindow(_THIS, SDL_Surface *surface); |
| 64 | void WIMP_SetDeviceMode(_THIS); |
| 65 | void WIMP_DeleteWindow(_THIS); |
| 66 | |
| 67 | /* FULLSCREEN function required for wimp/fullscreen toggling */ |
| 68 | extern int FULLSCREEN_SetMode(int width, int height, int bpp); |
| 69 | |
| 70 | /* Currently need to set this up here as it only works if you |
| 71 | start up in a Wimp mode */ |
| 72 | extern int RISCOS_ToggleFullScreen(_THIS, int fullscreen); |
| 73 | |
| 74 | extern int riscos_backbuffer; |
| 75 | extern int mouseInWindow; |
| 76 | extern int riscos_closeaction; |
| 77 | |
| 78 | /* Following needed to ensure window is shown immediately */ |
| 79 | extern int hasFocus; |
| 80 | extern void WIMP_Poll(_THIS, int waitTime); |
| 81 | |
| 82 | SDL_Surface *WIMP_SetVideoMode(_THIS, SDL_Surface *current, |
| 83 | int width, int height, int bpp, Uint32 flags) |
| 84 | { |
| 85 | Uint32 Rmask = 0; |
| 86 | Uint32 Gmask = 0; |
| 87 | Uint32 Bmask = 0; |
| 88 | char *buffer = NULL; |
| 89 | int bytesPerPixel = 1; |
| 90 | |
| 91 | /* Don't support double buffering in Wimp mode */ |
| 92 | flags &= ~SDL_DOUBLEBUF; |
| 93 | flags &= ~SDL_HWSURFACE; |
| 94 | |
| 95 | switch(bpp) |
| 96 | { |
| 97 | case 8: |
| 98 | /* Emulated palette using ColourTrans */ |
| 99 | flags |= SDL_HWPALETTE; |
| 100 | break; |
| 101 | |
| 102 | case 15: |
| 103 | case 16: |
| 104 | Bmask = 0x00007c00; |
| 105 | Gmask = 0x000003e0; |
| 106 | Rmask = 0x0000001f; |
| 107 | bytesPerPixel = 2; |
| 108 | break; |
| 109 | |
| 110 | case 32: |
| 111 | Bmask = 0x00ff0000; |
| 112 | Gmask = 0x0000ff00; |
| 113 | Rmask = 0x000000ff; |
| 114 | bytesPerPixel = 4; |
| 115 | break; |
| 116 | |
| 117 | default: |
| 118 | SDL_SetError("Pixel depth not supported"); |
| 119 | return NULL; |
| 120 | break; |
| 121 | } |
| 122 | |
| 123 | /* printf("Setting mode %dx%d\n", width, height);*/ |
| 124 | |
| 125 | /* Allocate the new pixel format for the screen */ |
| 126 | if ( ! SDL_ReallocFormat(current, bpp, Rmask, Gmask, Bmask, 0) ) { |
| 127 | SDL_SetError("Couldn't allocate new pixel format for requested mode"); |
| 128 | return(NULL); |
| 129 | } |
| 130 | |
| 131 | /* Set up the new mode framebuffer */ |
| 132 | current->w = width; |
| 133 | this->hidden->height = current->h = height; |
| 134 | |
| 135 | if (bpp == 15) bpp = 16; |
| 136 | buffer = WIMP_CreateBuffer(width, height, bpp); |
| 137 | if (buffer == NULL) |
| 138 | { |
| 139 | SDL_SetError("Couldn't create sprite for video memory"); |
| 140 | return (NULL); |
| 141 | } |
| 142 | |
| 143 | this->hidden->bank[0] = buffer + 60; /* Start of sprite data */ |
| 144 | if (bpp == 8) this->hidden->bank[0] += 2048; /* 8bpp sprite have palette first */ |
| 145 | |
| 146 | this->hidden->bank[1] = buffer; /* Start of buffer */ |
| 147 | |
| 148 | /* Remember sprite buffer so it can be freed later */ |
| 149 | if (this->hidden->alloc_bank) SDL_free(this->hidden->alloc_bank); |
| 150 | this->hidden->alloc_bank = buffer; |
| 151 | |
| 152 | current->pitch = width * bytesPerPixel; |
| 153 | if ((current->pitch & 3)) |
| 154 | { |
| 155 | /* Sprites are 32bit word aligned */ |
| 156 | current->pitch += (4 - (current->pitch & 3)); |
| 157 | } |
| 158 | |
| 159 | current->flags = flags | SDL_PREALLOC; |
| 160 | |
| 161 | WIMP_ReadModeInfo(this); |
| 162 | |
| 163 | SDL_memset(this->hidden->bank[0], 0, height * current->pitch); |
| 164 | |
| 165 | this->hidden->current_bank = 0; |
| 166 | current->pixels = this->hidden->bank[0]; |
| 167 | |
| 168 | |
| 169 | if (WIMP_SetupWindow(this, current) == 0) |
| 170 | { |
| 171 | SDL_SetError("Unable to create window to display surface"); |
| 172 | return NULL; |
| 173 | } |
| 174 | |
| 175 | /* Reset device functions for the wimp */ |
| 176 | WIMP_SetDeviceMode(this); |
| 177 | |
| 178 | /* Needs to set up plot info after window has been created */ |
| 179 | /* Not sure why, but plots don't work if I do it earlier */ |
| 180 | WIMP_SetupPlotInfo(this); |
| 181 | |
| 182 | /* Poll until window is shown */ |
| 183 | { |
| 184 | /* We wait until it gets the focus, but give up after 5 seconds |
| 185 | in case the focus is prevented in any way. |
| 186 | */ |
| 187 | Uint32 now = SDL_GetTicks(); |
| 188 | while (!hasFocus && SDL_GetTicks() - now < 5000) |
| 189 | { |
| 190 | WIMP_Poll(this, 0); |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | /* We're done */ |
| 195 | return(current); |
| 196 | } |
| 197 | |
| 198 | |
| 199 | void WIMP_ReadModeInfo(_THIS) |
| 200 | { |
| 201 | _kernel_swi_regs regs; |
| 202 | int vars[6]; |
| 203 | int vals[5]; |
| 204 | |
| 205 | vars[0] = 4; /* XEig */ |
| 206 | vars[1] = 5; /* YEig */ |
| 207 | vars[2] = 9; /* Log base 2 bpp */ |
| 208 | vars[3] = 11; /* Screen Width - 1 */ |
| 209 | vars[4] = 12; /* Screen Depth - 1 */ |
| 210 | vars[5] = -1; /* Terminate list */ |
| 211 | |
| 212 | regs.r[0] = (int)vars; |
| 213 | regs.r[1] = (int)vals; |
| 214 | _kernel_swi(OS_ReadVduVariables, ®s, ®s); |
| 215 | this->hidden->xeig = vals[0]; |
| 216 | this->hidden->yeig = vals[1]; |
| 217 | this->hidden->screen_bpp = 1 << vals[2]; |
| 218 | this->hidden->screen_width = vals[3] + 1; |
| 219 | this->hidden->screen_height = vals[4] + 1; |
| 220 | } |
| 221 | |
| 222 | /* Set device function to call the correct versions for running |
| 223 | in a wimp window */ |
| 224 | |
| 225 | void WIMP_SetDeviceMode(_THIS) |
| 226 | { |
| 227 | if (this->UpdateRects == WIMP_UpdateRects) return; /* Already set up */ |
| 228 | |
| 229 | this->SetColors = WIMP_SetColors; |
| 230 | this->UpdateRects = WIMP_UpdateRects; |
| 231 | |
| 232 | this->FlipHWSurface = NULL; |
| 233 | |
| 234 | this->SetCaption = WIMP_SetWMCaption; |
| 235 | this->SetIcon = NULL; |
| 236 | this->IconifyWindow = NULL; |
| 237 | |
| 238 | this->ShowWMCursor = WIMP_ShowWMCursor; |
| 239 | this->WarpWMCursor = WIMP_WarpWMCursor; |
| 240 | |
| 241 | this->ToggleFullScreen = RISCOS_ToggleFullScreen; |
| 242 | |
| 243 | this->PumpEvents = WIMP_PumpEvents; |
| 244 | } |
| 245 | |
| 246 | /* Setup the Window to display the surface */ |
| 247 | unsigned int WIMP_SetupWindow(_THIS, SDL_Surface *surface) |
| 248 | { |
| 249 | _kernel_swi_regs regs; |
| 250 | int window_data[23]; |
| 251 | int *window_block = window_data+1; |
| 252 | int x = (this->hidden->screen_width - surface->w) / 2; |
| 253 | int y = (this->hidden->screen_height - surface->h) / 2; |
| 254 | int xeig = this->hidden->xeig; |
| 255 | int yeig = this->hidden->yeig; |
| 256 | |
| 257 | mouseInWindow = 0; |
| 258 | |
| 259 | /* Always delete the window and recreate on a change */ |
| 260 | if (this->hidden->window_handle) WIMP_DeleteWindow(this); |
| 261 | |
| 262 | /* Setup window co-ordinates */ |
| 263 | window_block[0] = x << xeig; |
| 264 | window_block[1] = y << yeig; |
| 265 | window_block[2] = window_block[0] + (surface->w << xeig); |
| 266 | window_block[3] = window_block[1] + (surface->h << yeig); |
| 267 | |
| 268 | |
| 269 | window_block[4] = 0; /* Scroll offsets */ |
| 270 | window_block[5] = 0; |
| 271 | window_block[6] = -1; /* Open on top of window stack */ |
| 272 | |
| 273 | window_block[7] = 0x85040042; /* Window flags */ |
| 274 | if (riscos_closeaction != 0) window_block[7] |= 0x2000000; |
| 275 | |
| 276 | /* TODO: Take into account surface->flags */ |
| 277 | |
| 278 | window_block[8] = 0xff070207; /* Window colours */ |
| 279 | window_block[9] = 0x000c0103; |
| 280 | window_block[10] = 0; /* Work area minimum */ |
| 281 | window_block[11] = -surface->h << yeig; |
| 282 | window_block[12] = surface->w << xeig; /* Work area maximum */ |
| 283 | window_block[13] = 0; |
| 284 | window_block[14] = 0x2700013d; /* Title icon flags */ |
| 285 | window_block[15] = 0x00003000; /* Work area flags - Mouse click down reported */ |
| 286 | window_block[16] = 1; /* Sprite area control block pointer */ |
| 287 | window_block[17] = 0x00100010; /* Minimum window size (width & height) (16x16)*/ |
| 288 | window_block[18] = (int)this->hidden->title; /* Title data */ |
| 289 | window_block[19] = -1; |
| 290 | window_block[20] = 256; |
| 291 | window_block[21] = 0; /* Number of icons */ |
| 292 | |
| 293 | regs.r[1] = (unsigned int)(window_block); |
| 294 | |
| 295 | /* Create the window */ |
| 296 | if (_kernel_swi(Wimp_CreateWindow, ®s, ®s) == NULL) |
| 297 | { |
| 298 | this->hidden->window_handle = window_data[0] = regs.r[0]; |
| 299 | |
| 300 | /* Show the window on the screen */ |
| 301 | regs.r[1] = (unsigned int)window_data; |
| 302 | if (_kernel_swi(Wimp_OpenWindow, ®s, ®s) == NULL) |
| 303 | { |
| 304 | WIMP_SetFocus(this->hidden->window_handle); |
| 305 | } else |
| 306 | { |
| 307 | WIMP_DeleteWindow(this); |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | return this->hidden->window_handle; |
| 312 | } |
| 313 | |
| 314 | /* Destroy the Window */ |
| 315 | |
| 316 | void WIMP_DeleteWindow(_THIS) |
| 317 | { |
| 318 | _kernel_swi_regs regs; |
| 319 | regs.r[1] = (unsigned int)&(this->hidden->window_handle); |
| 320 | _kernel_swi(Wimp_DeleteWindow, ®s, ®s); |
| 321 | this->hidden->window_handle = 0; |
| 322 | } |
| 323 | |
| 324 | |
| 325 | void WIMP_UpdateRects(_THIS, int numrects, SDL_Rect *rects) |
| 326 | { |
| 327 | _kernel_swi_regs regs; |
| 328 | int update_block[12]; |
| 329 | int xeig = this->hidden->xeig; |
| 330 | int yeig = this->hidden->yeig; |
| 331 | int j; |
| 332 | update_block[0] = this->hidden->window_handle; |
| 333 | |
| 334 | for (j = 0; j < numrects; j++) |
| 335 | { |
| 336 | update_block[1] = rects[j].x << xeig; /* Min X */ |
| 337 | update_block[4] = -(rects[j].y << yeig); |
| 338 | update_block[3] = update_block[1] + (rects[j].w << xeig); |
| 339 | update_block[2] = update_block[4] - (rects[j].h << yeig); |
| 340 | |
| 341 | regs.r[1] = (int)update_block; |
| 342 | /* Update window can fail if called before first poll */ |
| 343 | if (_kernel_swi(Wimp_UpdateWindow, ®s, ®s) == 0) |
| 344 | { |
| 345 | while (regs.r[0]) |
| 346 | { |
| 347 | WIMP_PlotSprite(this, update_block[1], update_block[2]); |
| 348 | _kernel_swi(Wimp_GetRectangle, ®s, ®s); |
| 349 | } |
| 350 | } |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | |
| 355 | int WIMP_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) |
| 356 | { |
| 357 | unsigned int *pal = (unsigned int *)(this->hidden->bank[1]+60); |
| 358 | int j; |
| 359 | SDL_Rect update; |
| 360 | |
| 361 | pal += firstcolor*2; |
| 362 | for (j = 0; j < ncolors; j++) |
| 363 | { |
| 364 | *pal = (((unsigned int)colors->r) << 8) |
| 365 | + (((unsigned int)colors->g) << 16) |
| 366 | + (((unsigned int)colors->b) << 24); |
| 367 | pal[1] = *pal; |
| 368 | pal += 2; |
| 369 | colors++; |
| 370 | } |
| 371 | |
| 372 | WIMP_SetupPlotInfo(this); |
| 373 | |
| 374 | /* Need to refresh the window */ |
| 375 | update.x = 0; |
| 376 | update.y = 0; |
| 377 | update.w = SDL_VideoSurface->w; |
| 378 | update.h = SDL_VideoSurface->h; |
| 379 | WIMP_UpdateRects(this, 1, &update); |
| 380 | |
| 381 | return 1; |
| 382 | } |
| 383 | |
| 384 | void WIMP_SetWMCaption(_THIS, const char *title, const char *icon) |
| 385 | { |
| 386 | _kernel_swi_regs regs; |
| 387 | |
| 388 | SDL_strlcpy(this->hidden->title, title, SDL_arraysize(this->hidden->title)); |
| 389 | |
| 390 | if (RISCOS_GetWimpVersion() < 380) |
| 391 | { |
| 392 | int block[6]; |
| 393 | |
| 394 | regs.r[1] = (int)block; |
| 395 | _kernel_swi(Wimp_GetCaretPosition, ®s, ®s); |
| 396 | if (block[0] == (int)this->hidden->window_handle) |
| 397 | { |
| 398 | regs.r[0] = -1; |
| 399 | _kernel_swi(Wimp_SetCaretPosition, ®s,®s); |
| 400 | } else |
| 401 | { |
| 402 | regs.r[0] = this->hidden->window_handle; |
| 403 | regs.r[1] = -1; |
| 404 | regs.r[2] = -1; |
| 405 | regs.r[3] = -1; |
| 406 | _kernel_swi(Wimp_SetCaretPosition, ®s,®s); |
| 407 | } |
| 408 | regs.r[0] = block[0]; |
| 409 | regs.r[1] = block[1]; |
| 410 | regs.r[2] = block[2]; |
| 411 | regs.r[3] = block[3]; |
| 412 | regs.r[4] = block[4]; |
| 413 | regs.r[5] = block[5]; |
| 414 | _kernel_swi(Wimp_SetCaretPosition, ®s,®s); |
| 415 | } else |
| 416 | { |
| 417 | regs.r[0] = this->hidden->window_handle; |
| 418 | regs.r[1] = 0x4b534154; /* "TASK" */ |
| 419 | regs.r[2] = 3; /* Redraw title */ |
| 420 | _kernel_swi(Wimp_ForceRedraw, ®s, ®s); |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | void WIMP_RefreshDesktop(_THIS) |
| 425 | { |
| 426 | int width = this->hidden->screen_width << this->hidden->xeig; |
| 427 | int height = this->hidden->screen_height << this->hidden->yeig; |
| 428 | _kernel_swi_regs regs; |
| 429 | regs.r[0] = -1; /* Whole screen */ |
| 430 | regs.r[1] = 0; |
| 431 | regs.r[2] = 0; |
| 432 | regs.r[3] = width; |
| 433 | regs.r[4] = height; |
| 434 | _kernel_swi(Wimp_ForceRedraw, ®s, ®s); |
| 435 | } |
| 436 | |
| 437 | /* Toggle to window from full screen */ |
| 438 | int WIMP_ToggleFromFullScreen(_THIS) |
| 439 | { |
| 440 | int width = this->screen->w; |
| 441 | int height = this->screen->h; |
| 442 | int bpp = this->screen->format->BitsPerPixel; |
| 443 | char *buffer = NULL; |
| 444 | char *old_bank[2]; |
| 445 | char *old_alloc_bank; |
| 446 | |
| 447 | /* Ensure flags are OK */ |
| 448 | this->screen->flags &= ~(SDL_DOUBLEBUF|SDL_HWSURFACE); |
| 449 | |
| 450 | if (this->hidden->bank[0] == this->hidden->alloc_bank || riscos_backbuffer == 0) |
| 451 | { |
| 452 | /* Need to create a sprite for the screen and copy the data to it */ |
| 453 | char *data; |
| 454 | buffer = WIMP_CreateBuffer(width, height, bpp); |
| 455 | data = buffer + 60; /* Start of sprite data */ |
| 456 | if (bpp == 8) data += 2048; /* 8bpp sprite have palette first */ |
| 457 | |
| 458 | if (buffer == NULL) return 0; |
| 459 | SDL_memcpy(data, this->hidden->bank[0], width * height * this->screen->format->BytesPerPixel); |
| 460 | } |
| 461 | /* else We've switch to full screen before so we already have a sprite */ |
| 462 | |
| 463 | old_bank[0] = this->hidden->bank[0]; |
| 464 | old_bank[1] = this->hidden->bank[1]; |
| 465 | old_alloc_bank = this->hidden->alloc_bank; |
| 466 | |
| 467 | if (buffer != NULL) this->hidden->alloc_bank = buffer; |
| 468 | |
| 469 | this->hidden->bank[1] = this->hidden->alloc_bank; |
| 470 | this->hidden->bank[0] = this->hidden->bank[1] + 60; /* Start of sprite data */ |
| 471 | if (bpp == 8) this->hidden->bank[0] += 2048; /* 8bpp sprite have palette first */ |
| 472 | |
| 473 | this->hidden->current_bank = 0; |
| 474 | this->screen->pixels = this->hidden->bank[0]; |
| 475 | |
| 476 | RISCOS_RestoreWimpMode(); |
| 477 | WIMP_ReadModeInfo(this); |
| 478 | if (WIMP_SetupWindow(this, this->screen)) |
| 479 | { |
| 480 | WIMP_SetDeviceMode(this); |
| 481 | WIMP_SetupPlotInfo(this); |
| 482 | |
| 483 | if (riscos_backbuffer == 0) riscos_backbuffer = 1; |
| 484 | |
| 485 | if (buffer && old_alloc_bank) SDL_free(old_alloc_bank); |
| 486 | |
| 487 | return 1; |
| 488 | } else |
| 489 | { |
| 490 | /* Drop back to full screen mode on failure */ |
| 491 | this->hidden->bank[0] = old_bank[0]; |
| 492 | this->hidden->bank[1] = old_bank[1]; |
| 493 | this->hidden->alloc_bank = old_alloc_bank; |
| 494 | if (buffer) SDL_free(buffer); |
| 495 | |
| 496 | RISCOS_StoreWimpMode(); |
| 497 | FULLSCREEN_SetMode(width, height, bpp); |
| 498 | } |
| 499 | |
| 500 | return 0; |
| 501 | } |