| 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 | 23 March 2003 |
| 27 | |
| 28 | Implements RISC OS display device management. |
| 29 | Routines for full screen and wimp modes are split |
| 30 | into other source files. |
| 31 | */ |
| 32 | |
| 33 | #include "SDL_video.h" |
| 34 | #include "SDL_mouse.h" |
| 35 | #include "SDL_syswm.h" |
| 36 | #include "../SDL_sysvideo.h" |
| 37 | #include "../SDL_pixels_c.h" |
| 38 | #include "../../events/SDL_events_c.h" |
| 39 | |
| 40 | #include "SDL_riscostask.h" |
| 41 | #include "SDL_riscosvideo.h" |
| 42 | #include "SDL_riscosevents_c.h" |
| 43 | #include "SDL_riscosmouse_c.h" |
| 44 | |
| 45 | #include "kernel.h" |
| 46 | #include "swis.h" |
| 47 | |
| 48 | #define RISCOSVID_DRIVER_NAME "riscos" |
| 49 | |
| 50 | /* Initialization/Query functions */ |
| 51 | static int RISCOS_VideoInit(_THIS, SDL_PixelFormat *vformat); |
| 52 | static void RISCOS_VideoQuit(_THIS); |
| 53 | |
| 54 | static SDL_Rect **RISCOS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); |
| 55 | static SDL_Surface *RISCOS_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); |
| 56 | |
| 57 | int RISCOS_GetWmInfo(_THIS, SDL_SysWMinfo *info); |
| 58 | |
| 59 | int RISCOS_ToggleFullScreen(_THIS, int fullscreen); |
| 60 | /* Mouse checking */ |
| 61 | void RISCOS_CheckMouseMode(_THIS); |
| 62 | extern SDL_GrabMode RISCOS_GrabInput(_THIS, SDL_GrabMode mode); |
| 63 | |
| 64 | /* Fullscreen mode functions */ |
| 65 | extern SDL_Surface *FULLSCREEN_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); |
| 66 | extern void FULLSCREEN_BuildModeList(_THIS); |
| 67 | extern void FULLSCREEN_SetDeviceMode(_THIS); |
| 68 | extern int FULLSCREEN_ToggleFromWimp(_THIS); |
| 69 | |
| 70 | /* Wimp mode functions */ |
| 71 | extern SDL_Surface *WIMP_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); |
| 72 | extern void WIMP_DeleteWindow(_THIS); |
| 73 | extern int WIMP_ToggleFromFullScreen(_THIS); |
| 74 | |
| 75 | /* Hardware surface functions - common to WIMP and FULLSCREEN */ |
| 76 | static int RISCOS_AllocHWSurface(_THIS, SDL_Surface *surface); |
| 77 | static int RISCOS_LockHWSurface(_THIS, SDL_Surface *surface); |
| 78 | static void RISCOS_UnlockHWSurface(_THIS, SDL_Surface *surface); |
| 79 | static void RISCOS_FreeHWSurface(_THIS, SDL_Surface *surface); |
| 80 | |
| 81 | /* RISC OS driver bootstrap functions */ |
| 82 | |
| 83 | static int RISCOS_Available(void) |
| 84 | { |
| 85 | return(1); |
| 86 | } |
| 87 | |
| 88 | static void RISCOS_DeleteDevice(SDL_VideoDevice *device) |
| 89 | { |
| 90 | SDL_free(device->hidden); |
| 91 | SDL_free(device); |
| 92 | } |
| 93 | |
| 94 | static SDL_VideoDevice *RISCOS_CreateDevice(int devindex) |
| 95 | { |
| 96 | SDL_VideoDevice *device; |
| 97 | |
| 98 | /* Initialize all variables that we clean on shutdown */ |
| 99 | device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice)); |
| 100 | if ( device ) { |
| 101 | SDL_memset(device, 0, (sizeof *device)); |
| 102 | device->hidden = (struct SDL_PrivateVideoData *) |
| 103 | SDL_malloc((sizeof *device->hidden)); |
| 104 | } |
| 105 | if ( (device == NULL) || (device->hidden == NULL) ) { |
| 106 | SDL_OutOfMemory(); |
| 107 | if ( device ) { |
| 108 | SDL_free(device); |
| 109 | } |
| 110 | return(0); |
| 111 | } |
| 112 | SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
| 113 | |
| 114 | /* Set the function pointers */ |
| 115 | device->VideoInit = RISCOS_VideoInit; |
| 116 | device->VideoQuit = RISCOS_VideoQuit; |
| 117 | |
| 118 | device->ListModes = RISCOS_ListModes; |
| 119 | device->SetVideoMode = RISCOS_SetVideoMode; |
| 120 | device->CreateYUVOverlay = NULL; |
| 121 | device->AllocHWSurface = RISCOS_AllocHWSurface; |
| 122 | device->CheckHWBlit = NULL; |
| 123 | device->FillHWRect = NULL; |
| 124 | device->SetHWColorKey = NULL; |
| 125 | device->SetHWAlpha = NULL; |
| 126 | device->LockHWSurface = RISCOS_LockHWSurface; |
| 127 | device->UnlockHWSurface = RISCOS_UnlockHWSurface; |
| 128 | device->FreeHWSurface = RISCOS_FreeHWSurface; |
| 129 | |
| 130 | device->FreeWMCursor = RISCOS_FreeWMCursor; |
| 131 | device->CreateWMCursor = RISCOS_CreateWMCursor; |
| 132 | device->CheckMouseMode = RISCOS_CheckMouseMode; |
| 133 | device->GrabInput = RISCOS_GrabInput; |
| 134 | |
| 135 | device->InitOSKeymap = RISCOS_InitOSKeymap; |
| 136 | |
| 137 | device->GetWMInfo = RISCOS_GetWmInfo; |
| 138 | |
| 139 | device->free = RISCOS_DeleteDevice; |
| 140 | |
| 141 | /* Can't get Toggle screen to work if program starts up in Full screen mode so |
| 142 | disable it here and re-enable it when a wimp screen is chosen */ |
| 143 | device->ToggleFullScreen = NULL; /*RISCOS_ToggleFullScreen;*/ |
| 144 | |
| 145 | /* Set other entries for fullscreen mode */ |
| 146 | FULLSCREEN_SetDeviceMode(device); |
| 147 | |
| 148 | /* Mouse pointer needs to use the WIMP ShowCursor version so |
| 149 | that it doesn't modify the pointer until the SDL Window is |
| 150 | entered or the application goes full screen */ |
| 151 | device->ShowWMCursor = WIMP_ShowWMCursor; |
| 152 | |
| 153 | return device; |
| 154 | } |
| 155 | |
| 156 | VideoBootStrap RISCOS_bootstrap = { |
| 157 | RISCOSVID_DRIVER_NAME, "RISC OS video driver", |
| 158 | RISCOS_Available, RISCOS_CreateDevice |
| 159 | }; |
| 160 | |
| 161 | |
| 162 | int RISCOS_VideoInit(_THIS, SDL_PixelFormat *vformat) |
| 163 | { |
| 164 | _kernel_swi_regs regs; |
| 165 | int vars[4], vals[3]; |
| 166 | |
| 167 | if (RISCOS_InitTask() == 0) |
| 168 | { |
| 169 | SDL_SetError("Unable to start task"); |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | vars[0] = 9; /* Log base 2 bpp */ |
| 174 | vars[1] = 11; /* XWndLimit - num x pixels -1 */ |
| 175 | vars[2] = 12; /* YWndLimit - num y pixels -1 */ |
| 176 | vars[3] = -1; /* Terminate list */ |
| 177 | regs.r[0] = (int)vars; |
| 178 | regs.r[1] = (int)vals; |
| 179 | |
| 180 | _kernel_swi(OS_ReadVduVariables, ®s, ®s); |
| 181 | vformat->BitsPerPixel = (1 << vals[0]); |
| 182 | |
| 183 | /* Determine the current screen size */ |
| 184 | this->info.current_w = vals[1] + 1; |
| 185 | this->info.current_h = vals[2] + 1; |
| 186 | |
| 187 | /* Minimum bpp for SDL is 8 */ |
| 188 | if (vformat->BitsPerPixel < 8) vformat->BitsPerPixel = 8; |
| 189 | |
| 190 | |
| 191 | switch (vformat->BitsPerPixel) |
| 192 | { |
| 193 | case 15: |
| 194 | case 16: |
| 195 | vformat->Bmask = 0x00007c00; |
| 196 | vformat->Gmask = 0x000003e0; |
| 197 | vformat->Rmask = 0x0000001f; |
| 198 | vformat->BitsPerPixel = 16; /* SDL wants actual number of bits used */ |
| 199 | vformat->BytesPerPixel = 2; |
| 200 | break; |
| 201 | |
| 202 | case 24: |
| 203 | case 32: |
| 204 | vformat->Bmask = 0x00ff0000; |
| 205 | vformat->Gmask = 0x0000ff00; |
| 206 | vformat->Rmask = 0x000000ff; |
| 207 | vformat->BytesPerPixel = 4; |
| 208 | break; |
| 209 | |
| 210 | default: |
| 211 | vformat->Bmask = 0; |
| 212 | vformat->Gmask = 0; |
| 213 | vformat->Rmask = 0; |
| 214 | vformat->BytesPerPixel = 1; |
| 215 | break; |
| 216 | } |
| 217 | |
| 218 | /* Fill in some window manager capabilities */ |
| 219 | this->info.wm_available = 1; |
| 220 | |
| 221 | /* We're done! */ |
| 222 | return(0); |
| 223 | } |
| 224 | |
| 225 | /* Note: If we are terminated, this could be called in the middle of |
| 226 | another SDL video routine -- notably UpdateRects. |
| 227 | */ |
| 228 | void RISCOS_VideoQuit(_THIS) |
| 229 | { |
| 230 | RISCOS_ExitTask(); |
| 231 | |
| 232 | if (this->hidden->alloc_bank) SDL_free(this->hidden->alloc_bank); |
| 233 | this->hidden->alloc_bank = 0; |
| 234 | } |
| 235 | |
| 236 | |
| 237 | SDL_Rect **RISCOS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) |
| 238 | { |
| 239 | if (flags & SDL_FULLSCREEN) |
| 240 | { |
| 241 | /* Build mode list when first required. */ |
| 242 | if (SDL_nummodes[0] == 0) FULLSCREEN_BuildModeList(this); |
| 243 | |
| 244 | return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]); |
| 245 | } else |
| 246 | return (SDL_Rect **)-1; |
| 247 | } |
| 248 | |
| 249 | |
| 250 | /* Set up video mode */ |
| 251 | SDL_Surface *RISCOS_SetVideoMode(_THIS, SDL_Surface *current, |
| 252 | int width, int height, int bpp, Uint32 flags) |
| 253 | { |
| 254 | if (flags & SDL_FULLSCREEN) |
| 255 | { |
| 256 | RISCOS_StoreWimpMode(); |
| 257 | /* Dump wimp window on switch to full screen */ |
| 258 | if (this->hidden->window_handle) WIMP_DeleteWindow(this); |
| 259 | |
| 260 | return FULLSCREEN_SetVideoMode(this, current, width, height, bpp, flags); |
| 261 | } else |
| 262 | { |
| 263 | RISCOS_RestoreWimpMode(); |
| 264 | return WIMP_SetVideoMode(this, current, width, height, bpp, flags); |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | |
| 269 | /* We don't actually allow hardware surfaces other than the main one */ |
| 270 | static int RISCOS_AllocHWSurface(_THIS, SDL_Surface *surface) |
| 271 | { |
| 272 | return(-1); |
| 273 | } |
| 274 | static void RISCOS_FreeHWSurface(_THIS, SDL_Surface *surface) |
| 275 | { |
| 276 | return; |
| 277 | } |
| 278 | |
| 279 | /* We need to wait for vertical retrace on page flipped displays */ |
| 280 | static int RISCOS_LockHWSurface(_THIS, SDL_Surface *surface) |
| 281 | { |
| 282 | return(0); |
| 283 | } |
| 284 | |
| 285 | static void RISCOS_UnlockHWSurface(_THIS, SDL_Surface *surface) |
| 286 | { |
| 287 | return; |
| 288 | } |
| 289 | |
| 290 | |
| 291 | int RISCOS_GetWmInfo(_THIS, SDL_SysWMinfo *info) |
| 292 | { |
| 293 | SDL_VERSION(&(info->version)); |
| 294 | info->wimpVersion = RISCOS_GetWimpVersion(); |
| 295 | info->taskHandle = RISCOS_GetTaskHandle(); |
| 296 | info->window = this->hidden->window_handle; |
| 297 | |
| 298 | return 1; |
| 299 | } |
| 300 | /* Toggle full screen mode. |
| 301 | Returns 1 if successful otherwise 0 |
| 302 | */ |
| 303 | |
| 304 | int RISCOS_ToggleFullScreen(_THIS, int fullscreen) |
| 305 | { |
| 306 | if (fullscreen) |
| 307 | { |
| 308 | return FULLSCREEN_ToggleFromWimp(this); |
| 309 | } else |
| 310 | { |
| 311 | return WIMP_ToggleFromFullScreen(this); |
| 312 | } |
| 313 | |
| 314 | return 0; |
| 315 | } |
| 316 | |