SDL_x11mouse.c (12221B)
1/* 2 Simple DirectMedia Layer 3 Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org> 4 5 This software is provided 'as-is', without any express or implied 6 warranty. In no event will the authors be held liable for any damages 7 arising from the use of this software. 8 9 Permission is granted to anyone to use this software for any purpose, 10 including commercial applications, and to alter it and redistribute it 11 freely, subject to the following restrictions: 12 13 1. The origin of this software must not be misrepresented; you must not 14 claim that you wrote the original software. If you use this software 15 in a product, an acknowledgment in the product documentation would be 16 appreciated but is not required. 17 2. Altered source versions must be plainly marked as such, and must not be 18 misrepresented as being the original software. 19 3. This notice may not be removed or altered from any source distribution. 20*/ 21#include "../../SDL_internal.h" 22 23#if SDL_VIDEO_DRIVER_X11 24 25#include <X11/cursorfont.h> 26#include "SDL_assert.h" 27#include "SDL_x11video.h" 28#include "SDL_x11mouse.h" 29#include "SDL_x11xinput2.h" 30#include "../../events/SDL_mouse_c.h" 31 32 33/* FIXME: Find a better place to put this... */ 34static Cursor x11_empty_cursor = None; 35 36static Display * 37GetDisplay(void) 38{ 39 return ((SDL_VideoData *)SDL_GetVideoDevice()->driverdata)->display; 40} 41 42static Cursor 43X11_CreateEmptyCursor() 44{ 45 if (x11_empty_cursor == None) { 46 Display *display = GetDisplay(); 47 char data[1]; 48 XColor color; 49 Pixmap pixmap; 50 51 SDL_zero(data); 52 color.red = color.green = color.blue = 0; 53 pixmap = X11_XCreateBitmapFromData(display, DefaultRootWindow(display), 54 data, 1, 1); 55 if (pixmap) { 56 x11_empty_cursor = X11_XCreatePixmapCursor(display, pixmap, pixmap, 57 &color, &color, 0, 0); 58 X11_XFreePixmap(display, pixmap); 59 } 60 } 61 return x11_empty_cursor; 62} 63 64static void 65X11_DestroyEmptyCursor(void) 66{ 67 if (x11_empty_cursor != None) { 68 X11_XFreeCursor(GetDisplay(), x11_empty_cursor); 69 x11_empty_cursor = None; 70 } 71} 72 73static SDL_Cursor * 74X11_CreateDefaultCursor() 75{ 76 SDL_Cursor *cursor; 77 78 cursor = SDL_calloc(1, sizeof(*cursor)); 79 if (cursor) { 80 /* None is used to indicate the default cursor */ 81 cursor->driverdata = (void*)None; 82 } else { 83 SDL_OutOfMemory(); 84 } 85 86 return cursor; 87} 88 89#if SDL_VIDEO_DRIVER_X11_XCURSOR 90static Cursor 91X11_CreateXCursorCursor(SDL_Surface * surface, int hot_x, int hot_y) 92{ 93 Display *display = GetDisplay(); 94 Cursor cursor = None; 95 XcursorImage *image; 96 97 image = X11_XcursorImageCreate(surface->w, surface->h); 98 if (!image) { 99 SDL_OutOfMemory(); 100 return None; 101 } 102 image->xhot = hot_x; 103 image->yhot = hot_y; 104 image->delay = 0; 105 106 SDL_assert(surface->format->format == SDL_PIXELFORMAT_ARGB8888); 107 SDL_assert(surface->pitch == surface->w * 4); 108 SDL_memcpy(image->pixels, surface->pixels, surface->h * surface->pitch); 109 110 cursor = X11_XcursorImageLoadCursor(display, image); 111 112 X11_XcursorImageDestroy(image); 113 114 return cursor; 115} 116#endif /* SDL_VIDEO_DRIVER_X11_XCURSOR */ 117 118static Cursor 119X11_CreatePixmapCursor(SDL_Surface * surface, int hot_x, int hot_y) 120{ 121 Display *display = GetDisplay(); 122 XColor fg, bg; 123 Cursor cursor = None; 124 Uint32 *ptr; 125 Uint8 *data_bits, *mask_bits; 126 Pixmap data_pixmap, mask_pixmap; 127 int x, y; 128 unsigned int rfg, gfg, bfg, rbg, gbg, bbg, fgBits, bgBits; 129 unsigned int width_bytes = ((surface->w + 7) & ~7) / 8; 130 131 data_bits = SDL_calloc(1, surface->h * width_bytes); 132 if (!data_bits) { 133 SDL_OutOfMemory(); 134 return None; 135 } 136 137 mask_bits = SDL_calloc(1, surface->h * width_bytes); 138 if (!mask_bits) { 139 SDL_free(data_bits); 140 SDL_OutOfMemory(); 141 return None; 142 } 143 144 /* Code below assumes ARGB pixel format */ 145 SDL_assert(surface->format->format == SDL_PIXELFORMAT_ARGB8888); 146 147 rfg = gfg = bfg = rbg = gbg = bbg = fgBits = bgBits = 0; 148 for (y = 0; y < surface->h; ++y) { 149 ptr = (Uint32 *)((Uint8 *)surface->pixels + y * surface->pitch); 150 for (x = 0; x < surface->w; ++x) { 151 int alpha = (*ptr >> 24) & 0xff; 152 int red = (*ptr >> 16) & 0xff; 153 int green = (*ptr >> 8) & 0xff; 154 int blue = (*ptr >> 0) & 0xff; 155 if (alpha > 25) { 156 mask_bits[y * width_bytes + x / 8] |= (0x01 << (x % 8)); 157 158 if ((red + green + blue) > 0x40) { 159 fgBits++; 160 rfg += red; 161 gfg += green; 162 bfg += blue; 163 data_bits[y * width_bytes + x / 8] |= (0x01 << (x % 8)); 164 } else { 165 bgBits++; 166 rbg += red; 167 gbg += green; 168 bbg += blue; 169 } 170 } 171 ++ptr; 172 } 173 } 174 175 if (fgBits) { 176 fg.red = rfg * 257 / fgBits; 177 fg.green = gfg * 257 / fgBits; 178 fg.blue = bfg * 257 / fgBits; 179 } 180 else fg.red = fg.green = fg.blue = 0; 181 182 if (bgBits) { 183 bg.red = rbg * 257 / bgBits; 184 bg.green = gbg * 257 / bgBits; 185 bg.blue = bbg * 257 / bgBits; 186 } 187 else bg.red = bg.green = bg.blue = 0; 188 189 data_pixmap = X11_XCreateBitmapFromData(display, DefaultRootWindow(display), 190 (char*)data_bits, 191 surface->w, surface->h); 192 mask_pixmap = X11_XCreateBitmapFromData(display, DefaultRootWindow(display), 193 (char*)mask_bits, 194 surface->w, surface->h); 195 cursor = X11_XCreatePixmapCursor(display, data_pixmap, mask_pixmap, 196 &fg, &bg, hot_x, hot_y); 197 X11_XFreePixmap(display, data_pixmap); 198 X11_XFreePixmap(display, mask_pixmap); 199 200 return cursor; 201} 202 203static SDL_Cursor * 204X11_CreateCursor(SDL_Surface * surface, int hot_x, int hot_y) 205{ 206 SDL_Cursor *cursor; 207 208 cursor = SDL_calloc(1, sizeof(*cursor)); 209 if (cursor) { 210 Cursor x11_cursor = None; 211 212#if SDL_VIDEO_DRIVER_X11_XCURSOR 213 if (SDL_X11_HAVE_XCURSOR) { 214 x11_cursor = X11_CreateXCursorCursor(surface, hot_x, hot_y); 215 } 216#endif 217 if (x11_cursor == None) { 218 x11_cursor = X11_CreatePixmapCursor(surface, hot_x, hot_y); 219 } 220 cursor->driverdata = (void*)x11_cursor; 221 } else { 222 SDL_OutOfMemory(); 223 } 224 225 return cursor; 226} 227 228static SDL_Cursor * 229X11_CreateSystemCursor(SDL_SystemCursor id) 230{ 231 SDL_Cursor *cursor; 232 unsigned int shape; 233 234 switch(id) 235 { 236 default: 237 SDL_assert(0); 238 return NULL; 239 /* X Font Cursors reference: */ 240 /* http://tronche.com/gui/x/xlib/appendix/b/ */ 241 case SDL_SYSTEM_CURSOR_ARROW: shape = XC_left_ptr; break; 242 case SDL_SYSTEM_CURSOR_IBEAM: shape = XC_xterm; break; 243 case SDL_SYSTEM_CURSOR_WAIT: shape = XC_watch; break; 244 case SDL_SYSTEM_CURSOR_CROSSHAIR: shape = XC_tcross; break; 245 case SDL_SYSTEM_CURSOR_WAITARROW: shape = XC_watch; break; 246 case SDL_SYSTEM_CURSOR_SIZENWSE: shape = XC_fleur; break; 247 case SDL_SYSTEM_CURSOR_SIZENESW: shape = XC_fleur; break; 248 case SDL_SYSTEM_CURSOR_SIZEWE: shape = XC_sb_h_double_arrow; break; 249 case SDL_SYSTEM_CURSOR_SIZENS: shape = XC_sb_v_double_arrow; break; 250 case SDL_SYSTEM_CURSOR_SIZEALL: shape = XC_fleur; break; 251 case SDL_SYSTEM_CURSOR_NO: shape = XC_pirate; break; 252 case SDL_SYSTEM_CURSOR_HAND: shape = XC_hand2; break; 253 } 254 255 cursor = SDL_calloc(1, sizeof(*cursor)); 256 if (cursor) { 257 Cursor x11_cursor; 258 259 x11_cursor = X11_XCreateFontCursor(GetDisplay(), shape); 260 261 cursor->driverdata = (void*)x11_cursor; 262 } else { 263 SDL_OutOfMemory(); 264 } 265 266 return cursor; 267} 268 269static void 270X11_FreeCursor(SDL_Cursor * cursor) 271{ 272 Cursor x11_cursor = (Cursor)cursor->driverdata; 273 274 if (x11_cursor != None) { 275 X11_XFreeCursor(GetDisplay(), x11_cursor); 276 } 277 SDL_free(cursor); 278} 279 280static int 281X11_ShowCursor(SDL_Cursor * cursor) 282{ 283 Cursor x11_cursor = 0; 284 285 if (cursor) { 286 x11_cursor = (Cursor)cursor->driverdata; 287 } else { 288 x11_cursor = X11_CreateEmptyCursor(); 289 } 290 291 /* FIXME: Is there a better way than this? */ 292 { 293 SDL_VideoDevice *video = SDL_GetVideoDevice(); 294 Display *display = GetDisplay(); 295 SDL_Window *window; 296 SDL_WindowData *data; 297 298 for (window = video->windows; window; window = window->next) { 299 data = (SDL_WindowData *)window->driverdata; 300 if (x11_cursor != None) { 301 X11_XDefineCursor(display, data->xwindow, x11_cursor); 302 } else { 303 X11_XUndefineCursor(display, data->xwindow); 304 } 305 } 306 X11_XFlush(display); 307 } 308 return 0; 309} 310 311static void 312X11_WarpMouse(SDL_Window * window, int x, int y) 313{ 314 SDL_WindowData *data = (SDL_WindowData *) window->driverdata; 315 Display *display = data->videodata->display; 316 317 X11_XWarpPointer(display, None, data->xwindow, 0, 0, 0, 0, x, y); 318 X11_XSync(display, False); 319} 320 321static void 322X11_WarpMouseGlobal(int x, int y) 323{ 324 Display *display = GetDisplay(); 325 326 X11_XWarpPointer(display, None, DefaultRootWindow(display), 0, 0, 0, 0, x, y); 327 X11_XSync(display, False); 328} 329 330static int 331X11_SetRelativeMouseMode(SDL_bool enabled) 332{ 333#if SDL_VIDEO_DRIVER_X11_XINPUT2 334 if(X11_Xinput2IsInitialized()) 335 return 0; 336#else 337 SDL_Unsupported(); 338#endif 339 return -1; 340} 341 342static int 343X11_CaptureMouse(SDL_Window *window) 344{ 345 Display *display = GetDisplay(); 346 347 if (window) { 348 SDL_WindowData *data = (SDL_WindowData *) window->driverdata; 349 const unsigned int mask = ButtonPressMask | ButtonReleaseMask | PointerMotionMask | FocusChangeMask; 350 const int rc = X11_XGrabPointer(display, data->xwindow, False, 351 mask, GrabModeAsync, GrabModeAsync, 352 None, None, CurrentTime); 353 if (rc != GrabSuccess) { 354 return SDL_SetError("X server refused mouse capture"); 355 } 356 } else { 357 X11_XUngrabPointer(display, CurrentTime); 358 } 359 360 X11_XSync(display, False); 361 362 return 0; 363} 364 365static Uint32 366X11_GetGlobalMouseState(int *x, int *y) 367{ 368 Display *display = GetDisplay(); 369 const int num_screens = SDL_GetNumVideoDisplays(); 370 int i; 371 372 /* !!! FIXME: should we XSync() here first? */ 373 374 for (i = 0; i < num_screens; i++) { 375 SDL_DisplayData *data = (SDL_DisplayData *) SDL_GetDisplayDriverData(i); 376 if (data != NULL) { 377 Window root, child; 378 int rootx, rooty, winx, winy; 379 unsigned int mask; 380 if (X11_XQueryPointer(display, RootWindow(display, data->screen), &root, &child, &rootx, &rooty, &winx, &winy, &mask)) { 381 Uint32 retval = 0; 382 retval |= (mask & Button1Mask) ? SDL_BUTTON_LMASK : 0; 383 retval |= (mask & Button2Mask) ? SDL_BUTTON_MMASK : 0; 384 retval |= (mask & Button3Mask) ? SDL_BUTTON_RMASK : 0; 385 *x = data->x + rootx; 386 *y = data->y + rooty; 387 return retval; 388 } 389 } 390 } 391 392 SDL_assert(0 && "The pointer wasn't on any X11 screen?!"); 393 394 return 0; 395} 396 397 398void 399X11_InitMouse(_THIS) 400{ 401 SDL_Mouse *mouse = SDL_GetMouse(); 402 403 mouse->CreateCursor = X11_CreateCursor; 404 mouse->CreateSystemCursor = X11_CreateSystemCursor; 405 mouse->ShowCursor = X11_ShowCursor; 406 mouse->FreeCursor = X11_FreeCursor; 407 mouse->WarpMouse = X11_WarpMouse; 408 mouse->WarpMouseGlobal = X11_WarpMouseGlobal; 409 mouse->SetRelativeMouseMode = X11_SetRelativeMouseMode; 410 mouse->CaptureMouse = X11_CaptureMouse; 411 mouse->GetGlobalMouseState = X11_GetGlobalMouseState; 412 413 SDL_SetDefaultCursor(X11_CreateDefaultCursor()); 414} 415 416void 417X11_QuitMouse(_THIS) 418{ 419 X11_DestroyEmptyCursor(); 420} 421 422#endif /* SDL_VIDEO_DRIVER_X11 */ 423 424/* vi: set ts=4 sw=4 expandtab: */