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| 1 /* | |
| 2 * Copyright 2010 The WebRTC Project Authors. All rights reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #include "webrtc/base/x11windowpicker.h" | |
| 12 | |
| 13 #include <math.h> | |
| 14 #include <string.h> | |
| 15 | |
| 16 #include <algorithm> | |
| 17 #include <string> | |
| 18 | |
| 19 #include <X11/Xatom.h> | |
| 20 #include <X11/extensions/Xcomposite.h> | |
| 21 #include <X11/extensions/Xrender.h> | |
| 22 #include <X11/Xutil.h> | |
| 23 | |
| 24 #include "webrtc/base/constructormagic.h" | |
| 25 #include "webrtc/base/logging.h" | |
| 26 | |
| 27 namespace rtc { | |
| 28 | |
| 29 // Convenience wrapper for XGetWindowProperty results. | |
| 30 template <class PropertyType> | |
| 31 class XWindowProperty { | |
| 32 public: | |
| 33 XWindowProperty(Display* display, Window window, Atom property) | |
| 34 : data_(NULL) { | |
| 35 const int kBitsPerByte = 8; | |
| 36 Atom actual_type; | |
| 37 int actual_format; | |
| 38 unsigned long bytes_after; // NOLINT: type required by XGetWindowProperty | |
| 39 int status = XGetWindowProperty(display, window, property, 0L, ~0L, False, | |
| 40 AnyPropertyType, &actual_type, | |
| 41 &actual_format, &size_, | |
| 42 &bytes_after, &data_); | |
| 43 succeeded_ = (status == Success); | |
| 44 if (!succeeded_) { | |
| 45 data_ = NULL; // Ensure nothing is freed. | |
| 46 } else if (sizeof(PropertyType) * kBitsPerByte != actual_format) { | |
| 47 LOG(LS_WARNING) << "Returned type size differs from " | |
| 48 "requested type size."; | |
| 49 succeeded_ = false; | |
| 50 // We still need to call XFree in this case, so leave data_ alone. | |
| 51 } | |
| 52 if (!succeeded_) { | |
| 53 size_ = 0; | |
| 54 } | |
| 55 } | |
| 56 | |
| 57 ~XWindowProperty() { | |
| 58 if (data_) { | |
| 59 XFree(data_); | |
| 60 } | |
| 61 } | |
| 62 | |
| 63 bool succeeded() const { return succeeded_; } | |
| 64 size_t size() const { return size_; } | |
| 65 const PropertyType* data() const { | |
| 66 return reinterpret_cast<PropertyType*>(data_); | |
| 67 } | |
| 68 PropertyType* data() { | |
| 69 return reinterpret_cast<PropertyType*>(data_); | |
| 70 } | |
| 71 | |
| 72 private: | |
| 73 bool succeeded_; | |
| 74 unsigned long size_; // NOLINT: type required by XGetWindowProperty | |
| 75 unsigned char* data_; | |
| 76 | |
| 77 RTC_DISALLOW_COPY_AND_ASSIGN(XWindowProperty); | |
| 78 }; | |
| 79 | |
| 80 // Stupid X11. It seems none of the synchronous returns codes from X11 calls | |
| 81 // are meaningful unless an asynchronous error handler is configured. This | |
| 82 // RAII class registers and unregisters an X11 error handler. | |
| 83 class XErrorSuppressor { | |
| 84 public: | |
| 85 explicit XErrorSuppressor(Display* display) | |
| 86 : display_(display), original_error_handler_(NULL) { | |
| 87 SuppressX11Errors(); | |
| 88 } | |
| 89 ~XErrorSuppressor() { | |
| 90 UnsuppressX11Errors(); | |
| 91 } | |
| 92 | |
| 93 private: | |
| 94 static int ErrorHandler(Display* display, XErrorEvent* e) { | |
| 95 char buf[256]; | |
| 96 XGetErrorText(display, e->error_code, buf, sizeof buf); | |
| 97 LOG(LS_WARNING) << "Received X11 error \"" << buf << "\" for request code " | |
| 98 << static_cast<unsigned int>(e->request_code); | |
| 99 return 0; | |
| 100 } | |
| 101 | |
| 102 void SuppressX11Errors() { | |
| 103 XFlush(display_); | |
| 104 XSync(display_, False); | |
| 105 original_error_handler_ = XSetErrorHandler(&ErrorHandler); | |
| 106 } | |
| 107 | |
| 108 void UnsuppressX11Errors() { | |
| 109 XFlush(display_); | |
| 110 XSync(display_, False); | |
| 111 XErrorHandler handler = XSetErrorHandler(original_error_handler_); | |
| 112 if (handler != &ErrorHandler) { | |
| 113 LOG(LS_WARNING) << "Unbalanced XSetErrorHandler() calls detected. " | |
| 114 << "Final error handler may not be what you expect!"; | |
| 115 } | |
| 116 original_error_handler_ = NULL; | |
| 117 } | |
| 118 | |
| 119 Display* display_; | |
| 120 XErrorHandler original_error_handler_; | |
| 121 | |
| 122 RTC_DISALLOW_COPY_AND_ASSIGN(XErrorSuppressor); | |
| 123 }; | |
| 124 | |
| 125 // Hiding all X11 specifics inside its own class. This to avoid | |
| 126 // conflicts between talk and X11 header declarations. | |
| 127 class XWindowEnumerator { | |
| 128 public: | |
| 129 XWindowEnumerator() | |
| 130 : display_(NULL), | |
| 131 has_composite_extension_(false), | |
| 132 has_render_extension_(false) { | |
| 133 } | |
| 134 | |
| 135 ~XWindowEnumerator() { | |
| 136 if (display_ != NULL) { | |
| 137 XCloseDisplay(display_); | |
| 138 } | |
| 139 } | |
| 140 | |
| 141 bool Init() { | |
| 142 if (display_ != NULL) { | |
| 143 // Already initialized. | |
| 144 return true; | |
| 145 } | |
| 146 display_ = XOpenDisplay(NULL); | |
| 147 if (display_ == NULL) { | |
| 148 LOG(LS_ERROR) << "Failed to open display."; | |
| 149 return false; | |
| 150 } | |
| 151 | |
| 152 XErrorSuppressor error_suppressor(display_); | |
| 153 | |
| 154 wm_state_ = XInternAtom(display_, "WM_STATE", True); | |
| 155 net_wm_icon_ = XInternAtom(display_, "_NET_WM_ICON", False); | |
| 156 | |
| 157 int event_base, error_base, major_version, minor_version; | |
| 158 if (XCompositeQueryExtension(display_, &event_base, &error_base) && | |
| 159 XCompositeQueryVersion(display_, &major_version, &minor_version) && | |
| 160 // XCompositeNameWindowPixmap() requires version 0.2 | |
| 161 (major_version > 0 || minor_version >= 2)) { | |
| 162 has_composite_extension_ = true; | |
| 163 } else { | |
| 164 LOG(LS_INFO) << "Xcomposite extension not available or too old."; | |
| 165 } | |
| 166 | |
| 167 if (XRenderQueryExtension(display_, &event_base, &error_base) && | |
| 168 XRenderQueryVersion(display_, &major_version, &minor_version) && | |
| 169 // XRenderSetPictureTransform() requires version 0.6 | |
| 170 (major_version > 0 || minor_version >= 6)) { | |
| 171 has_render_extension_ = true; | |
| 172 } else { | |
| 173 LOG(LS_INFO) << "Xrender extension not available or too old."; | |
| 174 } | |
| 175 return true; | |
| 176 } | |
| 177 | |
| 178 bool EnumerateWindows(WindowDescriptionList* descriptions) { | |
| 179 if (!Init()) { | |
| 180 return false; | |
| 181 } | |
| 182 XErrorSuppressor error_suppressor(display_); | |
| 183 int num_screens = XScreenCount(display_); | |
| 184 bool result = false; | |
| 185 for (int i = 0; i < num_screens; ++i) { | |
| 186 if (EnumerateScreenWindows(descriptions, i)) { | |
| 187 // We know we succeded on at least one screen. | |
| 188 result = true; | |
| 189 } | |
| 190 } | |
| 191 return result; | |
| 192 } | |
| 193 | |
| 194 bool EnumerateDesktops(DesktopDescriptionList* descriptions) { | |
| 195 if (!Init()) { | |
| 196 return false; | |
| 197 } | |
| 198 XErrorSuppressor error_suppressor(display_); | |
| 199 Window default_root_window = XDefaultRootWindow(display_); | |
| 200 int num_screens = XScreenCount(display_); | |
| 201 for (int i = 0; i < num_screens; ++i) { | |
| 202 Window root_window = XRootWindow(display_, i); | |
| 203 DesktopId id(DesktopId(root_window, i)); | |
| 204 // TODO: Figure out an appropriate desktop title. | |
| 205 DesktopDescription desc(id, ""); | |
| 206 desc.set_primary(root_window == default_root_window); | |
| 207 descriptions->push_back(desc); | |
| 208 } | |
| 209 return num_screens > 0; | |
| 210 } | |
| 211 | |
| 212 bool IsVisible(const WindowId& id) { | |
| 213 if (!Init()) { | |
| 214 return false; | |
| 215 } | |
| 216 XErrorSuppressor error_suppressor(display_); | |
| 217 XWindowAttributes attr; | |
| 218 if (!XGetWindowAttributes(display_, id.id(), &attr)) { | |
| 219 LOG(LS_ERROR) << "XGetWindowAttributes() failed"; | |
| 220 return false; | |
| 221 } | |
| 222 return attr.map_state == IsViewable; | |
| 223 } | |
| 224 | |
| 225 bool MoveToFront(const WindowId& id) { | |
| 226 if (!Init()) { | |
| 227 return false; | |
| 228 } | |
| 229 XErrorSuppressor error_suppressor(display_); | |
| 230 unsigned int num_children; | |
| 231 Window* children; | |
| 232 Window parent; | |
| 233 Window root; | |
| 234 | |
| 235 // Find root window to pass event to. | |
| 236 int status = XQueryTree(display_, id.id(), &root, &parent, &children, | |
| 237 &num_children); | |
| 238 if (status == 0) { | |
| 239 LOG(LS_WARNING) << "Failed to query for child windows."; | |
| 240 return false; | |
| 241 } | |
| 242 if (children != NULL) { | |
| 243 XFree(children); | |
| 244 } | |
| 245 | |
| 246 // Move the window to front. | |
| 247 XRaiseWindow(display_, id.id()); | |
| 248 | |
| 249 // Some window managers (e.g., metacity in GNOME) consider it illegal to | |
| 250 // raise a window without also giving it input focus with | |
| 251 // _NET_ACTIVE_WINDOW, so XRaiseWindow() on its own isn't enough. | |
| 252 Atom atom = XInternAtom(display_, "_NET_ACTIVE_WINDOW", True); | |
| 253 if (atom != None) { | |
| 254 XEvent xev; | |
| 255 long event_mask; | |
| 256 | |
| 257 xev.xclient.type = ClientMessage; | |
| 258 xev.xclient.serial = 0; | |
| 259 xev.xclient.send_event = True; | |
| 260 xev.xclient.window = id.id(); | |
| 261 xev.xclient.message_type = atom; | |
| 262 | |
| 263 // The format member is set to 8, 16, or 32 and specifies whether the | |
| 264 // data should be viewed as a list of bytes, shorts, or longs. | |
| 265 xev.xclient.format = 32; | |
| 266 | |
| 267 xev.xclient.data.l[0] = 0; | |
| 268 xev.xclient.data.l[1] = 0; | |
| 269 xev.xclient.data.l[2] = 0; | |
| 270 xev.xclient.data.l[3] = 0; | |
| 271 xev.xclient.data.l[4] = 0; | |
| 272 | |
| 273 event_mask = SubstructureRedirectMask | SubstructureNotifyMask; | |
| 274 | |
| 275 XSendEvent(display_, root, False, event_mask, &xev); | |
| 276 } | |
| 277 XFlush(display_); | |
| 278 return true; | |
| 279 } | |
| 280 | |
| 281 uint8_t* GetWindowIcon(const WindowId& id, int* width, int* height) { | |
| 282 if (!Init()) { | |
| 283 return NULL; | |
| 284 } | |
| 285 XErrorSuppressor error_suppressor(display_); | |
| 286 Atom ret_type; | |
| 287 int format; | |
| 288 unsigned long length, bytes_after, size; | |
| 289 unsigned char* data = NULL; | |
| 290 | |
| 291 // Find out the size of the icon data. | |
| 292 if (XGetWindowProperty( | |
| 293 display_, id.id(), net_wm_icon_, 0, 0, False, XA_CARDINAL, | |
| 294 &ret_type, &format, &length, &size, &data) == Success && | |
| 295 data) { | |
| 296 XFree(data); | |
| 297 } else { | |
| 298 LOG(LS_ERROR) << "Failed to get size of the icon."; | |
| 299 return NULL; | |
| 300 } | |
| 301 // Get the icon data, the format is one uint32_t each for width and height, | |
| 302 // followed by the actual pixel data. | |
| 303 if (size >= 2 && | |
| 304 XGetWindowProperty( | |
| 305 display_, id.id(), net_wm_icon_, 0, size, False, XA_CARDINAL, | |
| 306 &ret_type, &format, &length, &bytes_after, &data) == Success && | |
| 307 data) { | |
| 308 uint32_t* data_ptr = reinterpret_cast<uint32_t*>(data); | |
| 309 int w, h; | |
| 310 w = data_ptr[0]; | |
| 311 h = data_ptr[1]; | |
| 312 if (size < static_cast<unsigned long>(w * h + 2)) { | |
| 313 XFree(data); | |
| 314 LOG(LS_ERROR) << "Not a vaild icon."; | |
| 315 return NULL; | |
| 316 } | |
| 317 uint8_t* rgba = ArgbToRgba(&data_ptr[2], 0, 0, w, h, w, h, true); | |
| 318 XFree(data); | |
| 319 *width = w; | |
| 320 *height = h; | |
| 321 return rgba; | |
| 322 } else { | |
| 323 LOG(LS_ERROR) << "Failed to get window icon data."; | |
| 324 return NULL; | |
| 325 } | |
| 326 } | |
| 327 | |
| 328 uint8_t* GetWindowThumbnail(const WindowId& id, int width, int height) { | |
| 329 if (!Init()) { | |
| 330 return NULL; | |
| 331 } | |
| 332 | |
| 333 if (!has_composite_extension_) { | |
| 334 // Without the Xcomposite extension we would only get a good thumbnail if | |
| 335 // the whole window is visible on screen and not covered by any | |
| 336 // other window. This is not something we want so instead, just | |
| 337 // bail out. | |
| 338 LOG(LS_INFO) << "No Xcomposite extension detected."; | |
| 339 return NULL; | |
| 340 } | |
| 341 XErrorSuppressor error_suppressor(display_); | |
| 342 | |
| 343 Window root; | |
| 344 int x; | |
| 345 int y; | |
| 346 unsigned int src_width; | |
| 347 unsigned int src_height; | |
| 348 unsigned int border_width; | |
| 349 unsigned int depth; | |
| 350 | |
| 351 // In addition to needing X11 server-side support for Xcomposite, it | |
| 352 // actually needs to be turned on for this window in order to get a good | |
| 353 // thumbnail. If the user has modern hardware/drivers but isn't using a | |
| 354 // compositing window manager, that won't be the case. Here we | |
| 355 // automatically turn it on for shareable windows so that we can get | |
| 356 // thumbnails. We used to avoid it because the transition is visually ugly, | |
| 357 // but recent window managers don't always redirect windows which led to | |
| 358 // no thumbnails at all, which is a worse experience. | |
| 359 | |
| 360 // Redirect drawing to an offscreen buffer (ie, turn on compositing). | |
| 361 // X11 remembers what has requested this and will turn it off for us when | |
| 362 // we exit. | |
| 363 XCompositeRedirectWindow(display_, id.id(), CompositeRedirectAutomatic); | |
| 364 Pixmap src_pixmap = XCompositeNameWindowPixmap(display_, id.id()); | |
| 365 if (!src_pixmap) { | |
| 366 // Even if the backing pixmap doesn't exist, this still should have | |
| 367 // succeeded and returned a valid handle (it just wouldn't be a handle to | |
| 368 // anything). So this is a real error path. | |
| 369 LOG(LS_ERROR) << "XCompositeNameWindowPixmap() failed"; | |
| 370 return NULL; | |
| 371 } | |
| 372 if (!XGetGeometry(display_, src_pixmap, &root, &x, &y, | |
| 373 &src_width, &src_height, &border_width, | |
| 374 &depth)) { | |
| 375 // If the window does not actually have a backing pixmap, this is the path | |
| 376 // that will "fail", so it's a warning rather than an error. | |
| 377 LOG(LS_WARNING) << "XGetGeometry() failed (probably composite is not in " | |
| 378 << "use)"; | |
| 379 XFreePixmap(display_, src_pixmap); | |
| 380 return NULL; | |
| 381 } | |
| 382 | |
| 383 // If we get to here, then composite is in use for this window and it has a | |
| 384 // valid backing pixmap. | |
| 385 | |
| 386 XWindowAttributes attr; | |
| 387 if (!XGetWindowAttributes(display_, id.id(), &attr)) { | |
| 388 LOG(LS_ERROR) << "XGetWindowAttributes() failed"; | |
| 389 XFreePixmap(display_, src_pixmap); | |
| 390 return NULL; | |
| 391 } | |
| 392 | |
| 393 uint8_t* data = GetDrawableThumbnail(src_pixmap, attr.visual, src_width, | |
| 394 src_height, width, height); | |
| 395 XFreePixmap(display_, src_pixmap); | |
| 396 return data; | |
| 397 } | |
| 398 | |
| 399 int GetNumDesktops() { | |
| 400 if (!Init()) { | |
| 401 return -1; | |
| 402 } | |
| 403 | |
| 404 return XScreenCount(display_); | |
| 405 } | |
| 406 | |
| 407 uint8_t* GetDesktopThumbnail(const DesktopId& id, int width, int height) { | |
| 408 if (!Init()) { | |
| 409 return NULL; | |
| 410 } | |
| 411 XErrorSuppressor error_suppressor(display_); | |
| 412 | |
| 413 Window root_window = id.id(); | |
| 414 XWindowAttributes attr; | |
| 415 if (!XGetWindowAttributes(display_, root_window, &attr)) { | |
| 416 LOG(LS_ERROR) << "XGetWindowAttributes() failed"; | |
| 417 return NULL; | |
| 418 } | |
| 419 | |
| 420 return GetDrawableThumbnail(root_window, | |
| 421 attr.visual, | |
| 422 attr.width, | |
| 423 attr.height, | |
| 424 width, | |
| 425 height); | |
| 426 } | |
| 427 | |
| 428 bool GetDesktopDimensions(const DesktopId& id, int* width, int* height) { | |
| 429 if (!Init()) { | |
| 430 return false; | |
| 431 } | |
| 432 XErrorSuppressor error_suppressor(display_); | |
| 433 XWindowAttributes attr; | |
| 434 if (!XGetWindowAttributes(display_, id.id(), &attr)) { | |
| 435 LOG(LS_ERROR) << "XGetWindowAttributes() failed"; | |
| 436 return false; | |
| 437 } | |
| 438 *width = attr.width; | |
| 439 *height = attr.height; | |
| 440 return true; | |
| 441 } | |
| 442 | |
| 443 private: | |
| 444 uint8_t* GetDrawableThumbnail(Drawable src_drawable, | |
| 445 Visual* visual, | |
| 446 int src_width, | |
| 447 int src_height, | |
| 448 int dst_width, | |
| 449 int dst_height) { | |
| 450 if (!has_render_extension_) { | |
| 451 // Without the Xrender extension we would have to read the full window and | |
| 452 // scale it down in our process. Xrender is over a decade old so we aren't | |
| 453 // going to expend effort to support that situation. We still need to | |
| 454 // check though because probably some virtual VNC displays are in this | |
| 455 // category. | |
| 456 LOG(LS_INFO) << "No Xrender extension detected."; | |
| 457 return NULL; | |
| 458 } | |
| 459 | |
| 460 XRenderPictFormat* format = XRenderFindVisualFormat(display_, | |
| 461 visual); | |
| 462 if (!format) { | |
| 463 LOG(LS_ERROR) << "XRenderFindVisualFormat() failed"; | |
| 464 return NULL; | |
| 465 } | |
| 466 | |
| 467 // Create a picture to reference the window pixmap. | |
| 468 XRenderPictureAttributes pa; | |
| 469 pa.subwindow_mode = IncludeInferiors; // Don't clip child widgets | |
| 470 Picture src = XRenderCreatePicture(display_, | |
| 471 src_drawable, | |
| 472 format, | |
| 473 CPSubwindowMode, | |
| 474 &pa); | |
| 475 if (!src) { | |
| 476 LOG(LS_ERROR) << "XRenderCreatePicture() failed"; | |
| 477 return NULL; | |
| 478 } | |
| 479 | |
| 480 // Create a picture to reference the destination pixmap. | |
| 481 Pixmap dst_pixmap = XCreatePixmap(display_, | |
| 482 src_drawable, | |
| 483 dst_width, | |
| 484 dst_height, | |
| 485 format->depth); | |
| 486 if (!dst_pixmap) { | |
| 487 LOG(LS_ERROR) << "XCreatePixmap() failed"; | |
| 488 XRenderFreePicture(display_, src); | |
| 489 return NULL; | |
| 490 } | |
| 491 | |
| 492 Picture dst = XRenderCreatePicture(display_, dst_pixmap, format, 0, NULL); | |
| 493 if (!dst) { | |
| 494 LOG(LS_ERROR) << "XRenderCreatePicture() failed"; | |
| 495 XFreePixmap(display_, dst_pixmap); | |
| 496 XRenderFreePicture(display_, src); | |
| 497 return NULL; | |
| 498 } | |
| 499 | |
| 500 // Clear the background. | |
| 501 XRenderColor transparent = {0}; | |
| 502 XRenderFillRectangle(display_, | |
| 503 PictOpSrc, | |
| 504 dst, | |
| 505 &transparent, | |
| 506 0, | |
| 507 0, | |
| 508 dst_width, | |
| 509 dst_height); | |
| 510 | |
| 511 // Calculate how much we need to scale the image. | |
| 512 double scale_x = static_cast<double>(dst_width) / | |
| 513 static_cast<double>(src_width); | |
| 514 double scale_y = static_cast<double>(dst_height) / | |
| 515 static_cast<double>(src_height); | |
| 516 double scale = std::min(scale_y, scale_x); | |
| 517 | |
| 518 int scaled_width = round(src_width * scale); | |
| 519 int scaled_height = round(src_height * scale); | |
| 520 | |
| 521 // Render the thumbnail centered on both axis. | |
| 522 int centered_x = (dst_width - scaled_width) / 2; | |
| 523 int centered_y = (dst_height - scaled_height) / 2; | |
| 524 | |
| 525 // Scaling matrix | |
| 526 XTransform xform = { { | |
| 527 { XDoubleToFixed(1), XDoubleToFixed(0), XDoubleToFixed(0) }, | |
| 528 { XDoubleToFixed(0), XDoubleToFixed(1), XDoubleToFixed(0) }, | |
| 529 { XDoubleToFixed(0), XDoubleToFixed(0), XDoubleToFixed(scale) } | |
| 530 } }; | |
| 531 XRenderSetPictureTransform(display_, src, &xform); | |
| 532 | |
| 533 // Apply filter to smooth out the image. | |
| 534 XRenderSetPictureFilter(display_, src, FilterBest, NULL, 0); | |
| 535 | |
| 536 // Render the image to the destination picture. | |
| 537 XRenderComposite(display_, | |
| 538 PictOpSrc, | |
| 539 src, | |
| 540 None, | |
| 541 dst, | |
| 542 0, | |
| 543 0, | |
| 544 0, | |
| 545 0, | |
| 546 centered_x, | |
| 547 centered_y, | |
| 548 scaled_width, | |
| 549 scaled_height); | |
| 550 | |
| 551 // Get the pixel data from the X server. TODO: XGetImage | |
| 552 // might be slow here, compare with ShmGetImage. | |
| 553 XImage* image = XGetImage(display_, | |
| 554 dst_pixmap, | |
| 555 0, | |
| 556 0, | |
| 557 dst_width, | |
| 558 dst_height, | |
| 559 AllPlanes, ZPixmap); | |
| 560 uint8_t* data = ArgbToRgba(reinterpret_cast<uint32_t*>(image->data), | |
| 561 centered_x, centered_y, scaled_width, | |
| 562 scaled_height, dst_width, dst_height, false); | |
| 563 XDestroyImage(image); | |
| 564 XRenderFreePicture(display_, dst); | |
| 565 XFreePixmap(display_, dst_pixmap); | |
| 566 XRenderFreePicture(display_, src); | |
| 567 return data; | |
| 568 } | |
| 569 | |
| 570 uint8_t* ArgbToRgba(uint32_t* argb_data, | |
| 571 int x, | |
| 572 int y, | |
| 573 int w, | |
| 574 int h, | |
| 575 int stride_x, | |
| 576 int stride_y, | |
| 577 bool has_alpha) { | |
| 578 uint8_t* p; | |
| 579 int len = stride_x * stride_y * 4; | |
| 580 uint8_t* data = new uint8_t[len]; | |
| 581 memset(data, 0, len); | |
| 582 p = data + 4 * (y * stride_x + x); | |
| 583 for (int i = 0; i < h; ++i) { | |
| 584 for (int j = 0; j < w; ++j) { | |
| 585 uint32_t argb; | |
| 586 uint32_t rgba; | |
| 587 argb = argb_data[stride_x * (y + i) + x + j]; | |
| 588 rgba = (argb << 8) | (argb >> 24); | |
| 589 *p = rgba >> 24; | |
| 590 ++p; | |
| 591 *p = (rgba >> 16) & 0xff; | |
| 592 ++p; | |
| 593 *p = (rgba >> 8) & 0xff; | |
| 594 ++p; | |
| 595 *p = has_alpha ? rgba & 0xFF : 0xFF; | |
| 596 ++p; | |
| 597 } | |
| 598 p += (stride_x - w) * 4; | |
| 599 } | |
| 600 return data; | |
| 601 } | |
| 602 | |
| 603 bool EnumerateScreenWindows(WindowDescriptionList* descriptions, int screen) { | |
| 604 Window parent; | |
| 605 Window *children; | |
| 606 int status; | |
| 607 unsigned int num_children; | |
| 608 Window root_window = XRootWindow(display_, screen); | |
| 609 status = XQueryTree(display_, root_window, &root_window, &parent, &children, | |
| 610 &num_children); | |
| 611 if (status == 0) { | |
| 612 LOG(LS_ERROR) << "Failed to query for child windows."; | |
| 613 return false; | |
| 614 } | |
| 615 for (unsigned int i = 0; i < num_children; ++i) { | |
| 616 // Iterate in reverse order to display windows from front to back. | |
| 617 #ifdef CHROMEOS | |
| 618 // TODO(jhorwich): Short-term fix for crbug.com/120229: Don't need to | |
| 619 // filter, just return all windows and let the picker scan through them. | |
| 620 Window app_window = children[num_children - 1 - i]; | |
| 621 #else | |
| 622 Window app_window = GetApplicationWindow(children[num_children - 1 - i]); | |
| 623 #endif | |
| 624 if (app_window && | |
| 625 !X11WindowPicker::IsDesktopElement(display_, app_window)) { | |
| 626 std::string title; | |
| 627 if (GetWindowTitle(app_window, &title)) { | |
| 628 WindowId id(app_window); | |
| 629 WindowDescription desc(id, title); | |
| 630 descriptions->push_back(desc); | |
| 631 } | |
| 632 } | |
| 633 } | |
| 634 if (children != NULL) { | |
| 635 XFree(children); | |
| 636 } | |
| 637 return true; | |
| 638 } | |
| 639 | |
| 640 bool GetWindowTitle(Window window, std::string* title) { | |
| 641 int status; | |
| 642 bool result = false; | |
| 643 XTextProperty window_name; | |
| 644 window_name.value = NULL; | |
| 645 if (window) { | |
| 646 status = XGetWMName(display_, window, &window_name); | |
| 647 if (status && window_name.value && window_name.nitems) { | |
| 648 int cnt; | |
| 649 char **list = NULL; | |
| 650 status = Xutf8TextPropertyToTextList(display_, &window_name, &list, | |
| 651 &cnt); | |
| 652 if (status >= Success && cnt && *list) { | |
| 653 if (cnt > 1) { | |
| 654 LOG(LS_INFO) << "Window has " << cnt | |
| 655 << " text properties, only using the first one."; | |
| 656 } | |
| 657 *title = *list; | |
| 658 result = true; | |
| 659 } | |
| 660 if (list != NULL) { | |
| 661 XFreeStringList(list); | |
| 662 } | |
| 663 } | |
| 664 if (window_name.value != NULL) { | |
| 665 XFree(window_name.value); | |
| 666 } | |
| 667 } | |
| 668 return result; | |
| 669 } | |
| 670 | |
| 671 Window GetApplicationWindow(Window window) { | |
| 672 Window root, parent; | |
| 673 Window app_window = 0; | |
| 674 Window *children; | |
| 675 unsigned int num_children; | |
| 676 Atom type = None; | |
| 677 int format; | |
| 678 unsigned long nitems, after; | |
| 679 unsigned char *data; | |
| 680 | |
| 681 int ret = XGetWindowProperty(display_, window, | |
| 682 wm_state_, 0L, 2, | |
| 683 False, wm_state_, &type, &format, | |
| 684 &nitems, &after, &data); | |
| 685 if (ret != Success) { | |
| 686 LOG(LS_ERROR) << "XGetWindowProperty failed with return code " << ret | |
| 687 << " for window " << window << "."; | |
| 688 return 0; | |
| 689 } | |
| 690 if (type != None) { | |
| 691 int64_t state = static_cast<int64_t>(*data); | |
| 692 XFree(data); | |
| 693 return state == NormalState ? window : 0; | |
| 694 } | |
| 695 XFree(data); | |
| 696 if (!XQueryTree(display_, window, &root, &parent, &children, | |
| 697 &num_children)) { | |
| 698 LOG(LS_ERROR) << "Failed to query for child windows although window" | |
| 699 << "does not have a valid WM_STATE."; | |
| 700 return 0; | |
| 701 } | |
| 702 for (unsigned int i = 0; i < num_children; ++i) { | |
| 703 app_window = GetApplicationWindow(children[i]); | |
| 704 if (app_window) { | |
| 705 break; | |
| 706 } | |
| 707 } | |
| 708 if (children != NULL) { | |
| 709 XFree(children); | |
| 710 } | |
| 711 return app_window; | |
| 712 } | |
| 713 | |
| 714 Atom wm_state_; | |
| 715 Atom net_wm_icon_; | |
| 716 Display* display_; | |
| 717 bool has_composite_extension_; | |
| 718 bool has_render_extension_; | |
| 719 }; | |
| 720 | |
| 721 X11WindowPicker::X11WindowPicker() : enumerator_(new XWindowEnumerator()) { | |
| 722 } | |
| 723 | |
| 724 X11WindowPicker::~X11WindowPicker() { | |
| 725 } | |
| 726 | |
| 727 bool X11WindowPicker::IsDesktopElement(_XDisplay* display, Window window) { | |
| 728 if (window == 0) { | |
| 729 LOG(LS_WARNING) << "Zero is never a valid window."; | |
| 730 return false; | |
| 731 } | |
| 732 | |
| 733 // First look for _NET_WM_WINDOW_TYPE. The standard | |
| 734 // (http://standards.freedesktop.org/wm-spec/latest/ar01s05.html#id2760306) | |
| 735 // says this hint *should* be present on all windows, and we use the existence | |
| 736 // of _NET_WM_WINDOW_TYPE_NORMAL in the property to indicate a window is not | |
| 737 // a desktop element (that is, only "normal" windows should be shareable). | |
| 738 Atom window_type_atom = XInternAtom(display, "_NET_WM_WINDOW_TYPE", True); | |
| 739 XWindowProperty<uint32_t> window_type(display, window, window_type_atom); | |
| 740 if (window_type.succeeded() && window_type.size() > 0) { | |
| 741 Atom normal_window_type_atom = XInternAtom( | |
| 742 display, "_NET_WM_WINDOW_TYPE_NORMAL", True); | |
| 743 uint32_t* end = window_type.data() + window_type.size(); | |
| 744 bool is_normal = (end != std::find( | |
| 745 window_type.data(), end, normal_window_type_atom)); | |
| 746 return !is_normal; | |
| 747 } | |
| 748 | |
| 749 // Fall back on using the hint. | |
| 750 XClassHint class_hint; | |
| 751 Status s = XGetClassHint(display, window, &class_hint); | |
| 752 bool result = false; | |
| 753 if (s == 0) { | |
| 754 // No hints, assume this is a normal application window. | |
| 755 return result; | |
| 756 } | |
| 757 static const std::string gnome_panel("gnome-panel"); | |
| 758 static const std::string desktop_window("desktop_window"); | |
| 759 | |
| 760 if (gnome_panel.compare(class_hint.res_name) == 0 || | |
| 761 desktop_window.compare(class_hint.res_name) == 0) { | |
| 762 result = true; | |
| 763 } | |
| 764 XFree(class_hint.res_name); | |
| 765 XFree(class_hint.res_class); | |
| 766 return result; | |
| 767 } | |
| 768 | |
| 769 bool X11WindowPicker::Init() { | |
| 770 return enumerator_->Init(); | |
| 771 } | |
| 772 | |
| 773 bool X11WindowPicker::GetWindowList(WindowDescriptionList* descriptions) { | |
| 774 return enumerator_->EnumerateWindows(descriptions); | |
| 775 } | |
| 776 | |
| 777 bool X11WindowPicker::GetDesktopList(DesktopDescriptionList* descriptions) { | |
| 778 return enumerator_->EnumerateDesktops(descriptions); | |
| 779 } | |
| 780 | |
| 781 bool X11WindowPicker::IsVisible(const WindowId& id) { | |
| 782 return enumerator_->IsVisible(id); | |
| 783 } | |
| 784 | |
| 785 bool X11WindowPicker::MoveToFront(const WindowId& id) { | |
| 786 return enumerator_->MoveToFront(id); | |
| 787 } | |
| 788 | |
| 789 uint8_t* X11WindowPicker::GetWindowIcon(const WindowId& id, | |
| 790 int* width, | |
| 791 int* height) { | |
| 792 return enumerator_->GetWindowIcon(id, width, height); | |
| 793 } | |
| 794 | |
| 795 uint8_t* X11WindowPicker::GetWindowThumbnail(const WindowId& id, | |
| 796 int width, | |
| 797 int height) { | |
| 798 return enumerator_->GetWindowThumbnail(id, width, height); | |
| 799 } | |
| 800 | |
| 801 int X11WindowPicker::GetNumDesktops() { | |
| 802 return enumerator_->GetNumDesktops(); | |
| 803 } | |
| 804 | |
| 805 uint8_t* X11WindowPicker::GetDesktopThumbnail(const DesktopId& id, | |
| 806 int width, | |
| 807 int height) { | |
| 808 return enumerator_->GetDesktopThumbnail(id, width, height); | |
| 809 } | |
| 810 | |
| 811 bool X11WindowPicker::GetDesktopDimensions(const DesktopId& id, int* width, | |
| 812 int* height) { | |
| 813 return enumerator_->GetDesktopDimensions(id, width, height); | |
| 814 } | |
| 815 | |
| 816 } // namespace rtc | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2511103002:
Delete WindowPicker class and subclasses. (Closed)
