| 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 mouse cursor shape definitions and positioning |
| 29 | */ |
| 30 | |
| 31 | #include "SDL_mouse.h" |
| 32 | #include "../../events/SDL_events_c.h" |
| 33 | |
| 34 | #include "SDL_riscosmouse_c.h" |
| 35 | |
| 36 | #include "kernel.h" |
| 37 | #include "swis.h" |
| 38 | |
| 39 | static WMcursor *current_cursor = NULL; |
| 40 | static WMcursor *defined_cursor = NULL; |
| 41 | |
| 42 | extern int mouseInWindow; |
| 43 | |
| 44 | /* Area to save cursor palette colours changed by SDL. |
| 45 | Actual values will be read before we change to the SDL cursor */ |
| 46 | static Uint8 wimp_cursor_palette[2][5] = { |
| 47 | {1, 25, 255, 255, 255}, |
| 48 | {3, 25, 255, 255, 255} |
| 49 | }; |
| 50 | |
| 51 | static int cursor_palette_saved = 0; |
| 52 | |
| 53 | void WIMP_SaveCursorPalette(); |
| 54 | void WIMP_RestoreWimpCursor(); |
| 55 | void WIMP_SetSDLCursorPalette(); |
| 56 | |
| 57 | |
| 58 | void RISCOS_FreeWMCursor(_THIS, WMcursor *cursor) |
| 59 | { |
| 60 | SDL_free(cursor->data); |
| 61 | SDL_free(cursor); |
| 62 | } |
| 63 | |
| 64 | WMcursor *RISCOS_CreateWMCursor(_THIS, |
| 65 | Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y) |
| 66 | { |
| 67 | WMcursor *cursor; |
| 68 | Uint8 *cursor_data; |
| 69 | Uint8 *ptr; |
| 70 | int i,j,k; |
| 71 | int data_byte, mask_byte; |
| 72 | |
| 73 | /* Check to make sure the cursor size is okay */ |
| 74 | if ( (w > 32) || (h > 32) ) { |
| 75 | SDL_SetError("Only with width and height <= 32 pixels are allowed"); |
| 76 | return(NULL); |
| 77 | } |
| 78 | |
| 79 | /* Allocate the cursor */ |
| 80 | cursor = (WMcursor *)SDL_malloc(sizeof(*cursor)); |
| 81 | if ( cursor == NULL ) { |
| 82 | SDL_SetError("Out of memory"); |
| 83 | return(NULL); |
| 84 | } |
| 85 | |
| 86 | /* Note: SDL says width must be a multiple of 8 */ |
| 87 | cursor_data = SDL_malloc(w/4 * h); |
| 88 | if (cursor_data == NULL) |
| 89 | { |
| 90 | SDL_free(cursor); |
| 91 | SDL_SetError("Out of memory"); |
| 92 | return(NULL); |
| 93 | } |
| 94 | |
| 95 | cursor->w = w; |
| 96 | cursor->h = h; |
| 97 | cursor->hot_x = hot_x; |
| 98 | cursor->hot_y = hot_y; |
| 99 | cursor->data = cursor_data; |
| 100 | |
| 101 | |
| 102 | /* Data / Mask Resulting pixel on screen |
| 103 | 0 / 1 White |
| 104 | 1 / 1 Black |
| 105 | 0 / 0 Transparent |
| 106 | 1 / 0 Inverted color if possible, black if not. |
| 107 | */ |
| 108 | ptr = cursor_data; |
| 109 | |
| 110 | for ( i=0; i<h; ++i ) |
| 111 | { |
| 112 | for (j = 0; j < w/8; ++j) |
| 113 | { |
| 114 | data_byte = *data; |
| 115 | mask_byte = *mask; |
| 116 | *ptr++ = 0; /* Sets whole byte transparent */ |
| 117 | *ptr = 0; |
| 118 | for (k = 0; k < 8; k++) |
| 119 | { |
| 120 | (*ptr) <<= 2; |
| 121 | if (data_byte & 1) *ptr |= 3; /* Black or inverted */ |
| 122 | else if(mask_byte & 1) *ptr |= 1; /* White */ |
| 123 | if ((k&3) == 3) ptr--; |
| 124 | data_byte >>= 1; |
| 125 | mask_byte >>= 1; |
| 126 | } |
| 127 | |
| 128 | ptr+=3; |
| 129 | data++; |
| 130 | mask++; |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | return(cursor); |
| 135 | } |
| 136 | |
| 137 | int RISCOS_ShowWMCursor(_THIS, WMcursor *cursor) |
| 138 | { |
| 139 | current_cursor = cursor; |
| 140 | |
| 141 | if (cursor == NULL) |
| 142 | { |
| 143 | _kernel_osbyte(106,0,0); |
| 144 | defined_cursor = NULL; |
| 145 | } else |
| 146 | { |
| 147 | WMcursor *old_cursor = defined_cursor; |
| 148 | |
| 149 | if (cursor != defined_cursor) |
| 150 | { |
| 151 | Uint8 cursor_def[10]; |
| 152 | |
| 153 | cursor_def[0] = 0; |
| 154 | cursor_def[1] = 2; /* Use shape number 2 */ |
| 155 | cursor_def[2] = cursor->w/4; /* Width in bytes */ |
| 156 | cursor_def[3] = cursor->h; /* Height (h) in pixels */ |
| 157 | cursor_def[4] = cursor->hot_x; /* ActiveX in pixels from left */ |
| 158 | cursor_def[5] = cursor->hot_y; /* ActiveY in pixels from top */ |
| 159 | cursor_def[6] = ((int)(cursor->data) & 0xFF); /* Least significant byte of pointer to data */ |
| 160 | cursor_def[7] = ((int)(cursor->data) >> 8) & 0xFF; /* ... */ |
| 161 | cursor_def[8] = ((int)(cursor->data) >> 16) & 0xFF; /* ... */ |
| 162 | cursor_def[9] = ((int)(cursor->data) >> 24) & 0xFF; /* Most significant byte of pointer to data */ |
| 163 | |
| 164 | if (_kernel_osword(21, (int *)cursor_def) != 0) |
| 165 | { |
| 166 | SDL_SetError("RISCOS couldn't create the cursor to show"); |
| 167 | return(0); |
| 168 | } |
| 169 | defined_cursor = cursor; |
| 170 | } |
| 171 | |
| 172 | if (old_cursor == NULL) |
| 173 | { |
| 174 | /* First time or reshow in window, so save/setup palette */ |
| 175 | if (!cursor_palette_saved) |
| 176 | { |
| 177 | WIMP_SaveCursorPalette(); |
| 178 | } |
| 179 | WIMP_SetSDLCursorPalette(); |
| 180 | } |
| 181 | |
| 182 | _kernel_osbyte(106, 2, 0); |
| 183 | } |
| 184 | |
| 185 | return(1); |
| 186 | } |
| 187 | |
| 188 | void FULLSCREEN_WarpWMCursor(_THIS, Uint16 x, Uint16 y) |
| 189 | { |
| 190 | Uint8 move_block[5]; |
| 191 | int eig_block[3]; |
| 192 | _kernel_swi_regs regs; |
| 193 | int os_x, os_y; |
| 194 | |
| 195 | eig_block[0] = 4; /* X eig factor */ |
| 196 | eig_block[1] = 5; /* Y eig factor */ |
| 197 | eig_block[2] = -1; /* End of list of variables to request */ |
| 198 | |
| 199 | regs.r[0] = (int)eig_block; |
| 200 | regs.r[1] = (int)eig_block; |
| 201 | _kernel_swi(OS_ReadVduVariables, ®s, ®s); |
| 202 | |
| 203 | os_x = x << eig_block[0]; |
| 204 | os_y = y << eig_block[1]; |
| 205 | |
| 206 | move_block[0] = 3; /* Move cursor */ |
| 207 | move_block[1] = os_x & 0xFF; |
| 208 | move_block[2] = (os_x >> 8) & 0xFF; |
| 209 | move_block[3] = os_y & 0xFF; |
| 210 | move_block[4] = (os_y >> 8) & 0xFF; |
| 211 | |
| 212 | _kernel_osword(21, (int *)move_block); |
| 213 | SDL_PrivateMouseMotion(0, 0, x, y); |
| 214 | } |
| 215 | |
| 216 | |
| 217 | /* Reshow cursor when mouse re-enters the window */ |
| 218 | void WIMP_ReshowCursor(_THIS) |
| 219 | { |
| 220 | defined_cursor = NULL; |
| 221 | cursor_palette_saved = 0; |
| 222 | RISCOS_ShowWMCursor(this, current_cursor); |
| 223 | } |
| 224 | |
| 225 | void WIMP_WarpWMCursor(_THIS, Uint16 x, Uint16 y) |
| 226 | { |
| 227 | _kernel_swi_regs regs; |
| 228 | int window_state[9]; |
| 229 | char block[5]; |
| 230 | int osX, osY; |
| 231 | |
| 232 | window_state[0] = this->hidden->window_handle; |
| 233 | regs.r[1] = (unsigned int)window_state; |
| 234 | _kernel_swi(Wimp_GetWindowState, ®s, ®s); |
| 235 | |
| 236 | osX = (x << this->hidden->xeig) + window_state[1]; |
| 237 | osY = window_state[4] - (y << this->hidden->yeig); |
| 238 | |
| 239 | block[0] = 3; |
| 240 | block[1] = osX & 0xFF; |
| 241 | block[2] = (osX >> 8) & 0xFF; |
| 242 | block[3] = osY & 0xFF; |
| 243 | block[4] = (osY >> 8) & 0xFF; |
| 244 | |
| 245 | regs.r[0] = 21; |
| 246 | regs.r[1] = (int)block; |
| 247 | _kernel_swi(OS_Word, ®s, ®s); |
| 248 | SDL_PrivateMouseMotion(0, 0, x, y); |
| 249 | } |
| 250 | |
| 251 | int WIMP_ShowWMCursor(_THIS, WMcursor *cursor) |
| 252 | { |
| 253 | if (mouseInWindow) return RISCOS_ShowWMCursor(this, cursor); |
| 254 | else current_cursor = cursor; |
| 255 | |
| 256 | return 1; |
| 257 | } |
| 258 | |
| 259 | SDL_GrabMode RISCOS_GrabInput(_THIS, SDL_GrabMode mode) |
| 260 | { |
| 261 | /* In fullscreen mode we don't need to do anything */ |
| 262 | if (mode < SDL_GRAB_FULLSCREEN) |
| 263 | { |
| 264 | _kernel_swi_regs regs; |
| 265 | unsigned char block[9]; |
| 266 | block[0] = 1; /* Define mouse cursor bounding block */ |
| 267 | |
| 268 | if ( mode == SDL_GRAB_OFF ) |
| 269 | { |
| 270 | /* Clip to whole screen */ |
| 271 | |
| 272 | int r = (this->hidden->screen_width << this->hidden->xeig) - 1; |
| 273 | int t = (this->hidden->screen_height << this->hidden->yeig) - 1; |
| 274 | |
| 275 | block[1] = 0; block[2] = 0; /* Left*/ |
| 276 | block[3] = 0; block[4] = 0; /* Bottom */ |
| 277 | block[5] = r & 0xFF; block[6] = (r >> 8) & 0xFF; /* Right */ |
| 278 | block[7] = t & 0xFF; block[8] = (t >> 8) & 0xFF; /* Top */ |
| 279 | } else |
| 280 | { |
| 281 | /* Clip to window */ |
| 282 | unsigned char window_state[36]; |
| 283 | |
| 284 | *((int *)window_state) = this->hidden->window_handle; |
| 285 | regs.r[1] = (unsigned int)window_state; |
| 286 | _kernel_swi(Wimp_GetWindowState, ®s, ®s); |
| 287 | |
| 288 | block[1] = window_state[4]; |
| 289 | block[2] = window_state[5]; |
| 290 | block[3] = window_state[8]; |
| 291 | block[4] = window_state[9]; |
| 292 | block[5] = window_state[12]; |
| 293 | block[6] = window_state[13]; |
| 294 | block[7] = window_state[16]; |
| 295 | block[8] = window_state[17]; |
| 296 | |
| 297 | } |
| 298 | |
| 299 | regs.r[0] = 21; /* OS word code */ |
| 300 | regs.r[1] = (int)block; |
| 301 | _kernel_swi(OS_Word, ®s, ®s); |
| 302 | } |
| 303 | |
| 304 | return mode; |
| 305 | } |
| 306 | |
| 307 | /* Save mouse cursor palette to be restore when we are no longer |
| 308 | defining a cursor */ |
| 309 | |
| 310 | void WIMP_SaveCursorPalette() |
| 311 | { |
| 312 | _kernel_swi_regs regs; |
| 313 | int colour; |
| 314 | |
| 315 | for (colour = 0; colour < 2; colour++) |
| 316 | { |
| 317 | regs.r[0] = (int)wimp_cursor_palette[colour][0]; |
| 318 | regs.r[1] = 25; |
| 319 | /* Read settings with OS_ReadPalette */ |
| 320 | if (_kernel_swi(0x2f, ®s, ®s) == NULL) |
| 321 | { |
| 322 | wimp_cursor_palette[colour][2] = (unsigned char)((regs.r[2] >> 8) & 0xFF); |
| 323 | wimp_cursor_palette[colour][3] = (unsigned char)((regs.r[2] >> 16) & 0xFF); |
| 324 | wimp_cursor_palette[colour][4] = (unsigned char)((regs.r[2] >> 24) & 0xFF); |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | cursor_palette_saved = 1; |
| 329 | } |
| 330 | |
| 331 | /* Restore the WIMP's cursor when we leave the SDL window */ |
| 332 | void WIMP_RestoreWimpCursor() |
| 333 | { |
| 334 | int colour; |
| 335 | |
| 336 | /* Reset to pointer shape 1 */ |
| 337 | _kernel_osbyte(106, 1, 0); |
| 338 | |
| 339 | /* Reset pointer colours */ |
| 340 | if (cursor_palette_saved) |
| 341 | { |
| 342 | for (colour = 0; colour < 2; colour++) |
| 343 | { |
| 344 | _kernel_osword(12, (int *)wimp_cursor_palette[colour]); |
| 345 | } |
| 346 | } |
| 347 | cursor_palette_saved = 0; |
| 348 | } |
| 349 | |
| 350 | /* Set palette used for SDL mouse cursors */ |
| 351 | void WIMP_SetSDLCursorPalette() |
| 352 | { |
| 353 | /* First time set up the mouse colours */ |
| 354 | Uint8 block[5]; |
| 355 | |
| 356 | /* Set up colour 1 as white */ |
| 357 | block[0] = 1; /* Colour to change 1 - 3 */ |
| 358 | block[1] = 25; /* Set pointer colour */ |
| 359 | block[2] = 255; /* red component*/ |
| 360 | block[3] = 255; /* green component */ |
| 361 | block[4] = 255; /* blue component*/ |
| 362 | _kernel_osword(12, (int *)block); |
| 363 | |
| 364 | /* Set colour 3 to back */ |
| 365 | block[0] = 3; /* Colour to change 1 - 3 */ |
| 366 | block[1] = 25; /* Set pointer colour*/ |
| 367 | block[2] = 0; /* red component*/ |
| 368 | block[3] = 0; /* green component */ |
| 369 | block[4] = 0; /* blue component*/ |
| 370 | _kernel_osword(12, (int *)block); |
| 371 | } |