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Diffstat (limited to 'chrome/common/x11_util.cc')
| -rw-r--r-- | chrome/common/x11_util.cc | 751 |
1 files changed, 0 insertions, 751 deletions
diff --git a/chrome/common/x11_util.cc b/chrome/common/x11_util.cc deleted file mode 100644 index 8d052c6..0000000 --- a/chrome/common/x11_util.cc +++ /dev/null @@ -1,751 +0,0 @@ -// Copyright (c) 2010 The Chromium Authors. All rights reserved. -// Use of this source code is governed by a BSD-style license that can be -// found in the LICENSE file. - -// This file defines utility functions for X11 (Linux only). This code has been -// ported from XCB since we can't use XCB on Ubuntu while its 32-bit support -// remains woefully incomplete. - -#include "chrome/common/x11_util.h" - -#include <gdk/gdk.h> -#include <gdk/gdkx.h> -#include <gtk/gtk.h> - -#include <sys/ipc.h> -#include <sys/shm.h> - -#include <list> -#include <set> - -#include "base/command_line.h" -#include "base/logging.h" -#include "base/thread.h" -#include "chrome/common/x11_util_internal.h" -#include "gfx/size.h" - -namespace x11_util { - -namespace { - -// Used to cache the XRenderPictFormat for a visual/display pair. -struct CachedPictFormat { - bool equals(Display* display, Visual* visual) const { - return display == this->display && visual == this->visual; - } - - Display* display; - Visual* visual; - XRenderPictFormat* format; -}; - -typedef std::list<CachedPictFormat> CachedPictFormats; - -// Returns the cache of pict formats. -CachedPictFormats* get_cached_pict_formats() { - static CachedPictFormats* formats = NULL; - if (!formats) - formats = new CachedPictFormats(); - return formats; -} - -// Maximum number of CachedPictFormats we keep around. -const size_t kMaxCacheSize = 5; - -} // namespace - -bool XDisplayExists() { - return (gdk_display_get_default() != NULL); -} - -Display* GetXDisplay() { - static Display* display = NULL; - - if (!display) - display = gdk_x11_get_default_xdisplay(); - - return display; -} - -static SharedMemorySupport DoQuerySharedMemorySupport(Display* dpy) { - // A temporary flag for tracking down shared memory problems. - // TODO(evanm): remove this. - if (CommandLine::ForCurrentProcess()->HasSwitch("disable-xshm")) - return SHARED_MEMORY_NONE; - - int dummy; - Bool pixmaps_supported; - // Query the server's support for XSHM. - if (!XShmQueryVersion(dpy, &dummy, &dummy, &pixmaps_supported)) - return SHARED_MEMORY_NONE; - - // Next we probe to see if shared memory will really work - int shmkey = shmget(IPC_PRIVATE, 1, 0666); - if (shmkey == -1) - return SHARED_MEMORY_NONE; - void* address = shmat(shmkey, NULL, 0); - // Mark the shared memory region for deletion - shmctl(shmkey, IPC_RMID, NULL); - - XShmSegmentInfo shminfo; - memset(&shminfo, 0, sizeof(shminfo)); - shminfo.shmid = shmkey; - - gdk_error_trap_push(); - bool result = XShmAttach(dpy, &shminfo); - XSync(dpy, False); - if (gdk_error_trap_pop()) - result = false; - shmdt(address); - if (!result) - return SHARED_MEMORY_NONE; - - XShmDetach(dpy, &shminfo); - return pixmaps_supported ? SHARED_MEMORY_PIXMAP : SHARED_MEMORY_PUTIMAGE; -} - -SharedMemorySupport QuerySharedMemorySupport(Display* dpy) { - static SharedMemorySupport shared_memory_support = SHARED_MEMORY_NONE; - static bool shared_memory_support_cached = false; - - if (shared_memory_support_cached) - return shared_memory_support; - - shared_memory_support = DoQuerySharedMemorySupport(dpy); - shared_memory_support_cached = true; - - return shared_memory_support; -} - -bool QueryRenderSupport(Display* dpy) { - static bool render_supported = false; - static bool render_supported_cached = false; - - if (render_supported_cached) - return render_supported; - - // We don't care about the version of Xrender since all the features which - // we use are included in every version. - int dummy; - render_supported = XRenderQueryExtension(dpy, &dummy, &dummy); - render_supported_cached = true; - - return render_supported; -} - -int GetDefaultScreen(Display* display) { - return XDefaultScreen(display); -} - -XID GetX11RootWindow() { - return GDK_WINDOW_XID(gdk_get_default_root_window()); -} - -XID GetX11WindowFromGtkWidget(GtkWidget* widget) { - return GDK_WINDOW_XID(widget->window); -} - -XID GetX11WindowFromGdkWindow(GdkWindow* window) { - return GDK_WINDOW_XID(window); -} - -void* GetVisualFromGtkWidget(GtkWidget* widget) { - return GDK_VISUAL_XVISUAL(gtk_widget_get_visual(widget)); -} - -int BitsPerPixelForPixmapDepth(Display* dpy, int depth) { - int count; - XPixmapFormatValues* formats = XListPixmapFormats(dpy, &count); - if (!formats) - return -1; - - int bits_per_pixel = -1; - for (int i = 0; i < count; ++i) { - if (formats[i].depth == depth) { - bits_per_pixel = formats[i].bits_per_pixel; - break; - } - } - - XFree(formats); - return bits_per_pixel; -} - -bool IsWindowVisible(XID window) { - XWindowAttributes win_attributes; - XGetWindowAttributes(GetXDisplay(), window, &win_attributes); - return (win_attributes.map_state == IsViewable); -} - -bool GetWindowRect(XID window, gfx::Rect* rect) { - Window root, child; - int x, y; - unsigned int width, height; - unsigned int border_width, depth; - - if (!XGetGeometry(GetXDisplay(), window, &root, &x, &y, - &width, &height, &border_width, &depth)) - return false; - - if (!XTranslateCoordinates(GetSecondaryDisplay(), window, root, - 0, 0, &x, &y, &child)) - return false; - - *rect = gfx::Rect(x, y, width, height); - return true; -} - -bool GetIntProperty(XID window, const std::string& property_name, int* value) { - Atom property_atom = gdk_x11_get_xatom_by_name_for_display( - gdk_display_get_default(), property_name.c_str()); - - Atom type = None; - int format = 0; // size in bits of each item in 'property' - long unsigned int num_items = 0, remaining_bytes = 0; - unsigned char* property = NULL; - - int result = XGetWindowProperty(GetXDisplay(), - window, - property_atom, - 0, // offset into property data to read - 1, // max length to get - False, // deleted - AnyPropertyType, - &type, - &format, - &num_items, - &remaining_bytes, - &property); - if (result != Success) - return false; - - if (format != 32 || num_items != 1) { - XFree(property); - return false; - } - - *value = *(reinterpret_cast<int*>(property)); - XFree(property); - return true; -} - -bool GetStringProperty( - XID window, const std::string& property_name, std::string* value) { - Atom property_atom = gdk_x11_get_xatom_by_name_for_display( - gdk_display_get_default(), property_name.c_str()); - - Atom type = None; - int format = 0; // size in bits of each item in 'property' - long unsigned int num_items = 0, remaining_bytes = 0; - unsigned char* property = NULL; - - int result = XGetWindowProperty(GetXDisplay(), - window, - property_atom, - 0, // offset into property data to read - 1024, // max length to get - False, // deleted - AnyPropertyType, - &type, - &format, - &num_items, - &remaining_bytes, - &property); - if (result != Success) - return false; - - if (format != 8) { - XFree(property); - return false; - } - - value->assign(reinterpret_cast<char*>(property), num_items); - XFree(property); - return true; -} - -XID GetParentWindow(XID window) { - XID root = None; - XID parent = None; - XID* children = NULL; - unsigned int num_children = 0; - XQueryTree(GetXDisplay(), window, &root, &parent, &children, &num_children); - if (children) - XFree(children); - return parent; -} - -XID GetHighestAncestorWindow(XID window, XID root) { - while (true) { - XID parent = x11_util::GetParentWindow(window); - if (parent == None) - return None; - if (parent == root) - return window; - window = parent; - } -} - -// Returns true if |window| is a named window. -bool IsWindowNamed(XID window) { - XTextProperty prop; - if (!XGetWMName(GetXDisplay(), window, &prop) || !prop.value) - return false; - - XFree(prop.value); - return true; -} - -bool EnumerateChildren(EnumerateWindowsDelegate* delegate, XID window, - const int max_depth, int depth) { - if (depth > max_depth) - return false; - - XID root, parent, *children; - unsigned int num_children; - int status = XQueryTree(GetXDisplay(), window, &root, &parent, &children, - &num_children); - if (status == 0) - return false; - - std::set<XID> windows; - for (unsigned int i = 0; i < num_children; i++) - windows.insert(children[i]); - - XFree(children); - - // XQueryTree returns the children of |window| in bottom-to-top order, so - // reverse-iterate the list to check the windows from top-to-bottom. - std::set<XID>::reverse_iterator iter; - for (iter = windows.rbegin(); iter != windows.rend(); iter++) { - if (IsWindowNamed(*iter) && delegate->ShouldStopIterating(*iter)) - return true; - } - - // If we're at this point, we didn't find the window we're looking for at the - // current level, so we need to recurse to the next level. We use a second - // loop because the recursion and call to XQueryTree are expensive and is only - // needed for a small number of cases. - if (++depth <= max_depth) { - for (iter = windows.rbegin(); iter != windows.rend(); iter++) { - if (EnumerateChildren(delegate, *iter, max_depth, depth)) - return true; - } - } - - return false; -} - -bool EnumerateAllWindows(EnumerateWindowsDelegate* delegate, int max_depth) { - XID root = GetX11RootWindow(); - return EnumerateChildren(delegate, root, max_depth, 0); -} - -bool GetXWindowStack(std::vector<XID>* windows) { - windows->clear(); - - static Atom atom = XInternAtom(GetXDisplay(), - "_NET_CLIENT_LIST_STACKING", False); - - Atom type; - int format; - unsigned long count; - unsigned long bytes_after; - unsigned char *data = NULL; - if (XGetWindowProperty(GetXDisplay(), - GetX11RootWindow(), - atom, - 0, // offset - ~0L, // length - False, // delete - AnyPropertyType, // requested type - &type, - &format, - &count, - &bytes_after, - &data) != Success) { - return false; - } - - bool result = false; - if (type == XA_WINDOW && format == 32 && data && count > 0) { - result = true; - XID* stack = reinterpret_cast<XID*>(data); - for (unsigned long i = 0; i < count; i++) - windows->insert(windows->begin(), stack[i]); - } - - if (data) - XFree(data); - - return result; -} - -void RestackWindow(XID window, XID sibling, bool above) { - XWindowChanges changes; - changes.sibling = sibling; - changes.stack_mode = above ? Above : Below; - XConfigureWindow(GetXDisplay(), window, CWSibling | CWStackMode, &changes); -} - -XRenderPictFormat* GetRenderVisualFormat(Display* dpy, Visual* visual) { - DCHECK(QueryRenderSupport(dpy)); - - CachedPictFormats* formats = get_cached_pict_formats(); - - for (CachedPictFormats::const_iterator i = formats->begin(); - i != formats->end(); ++i) { - if (i->equals(dpy, visual)) - return i->format; - } - - // Not cached, look up the value. - XRenderPictFormat* pictformat = XRenderFindVisualFormat(dpy, visual); - CHECK(pictformat) << "XRENDER does not support default visual"; - - // And store it in the cache. - CachedPictFormat cached_value; - cached_value.visual = visual; - cached_value.display = dpy; - cached_value.format = pictformat; - formats->push_front(cached_value); - - if (formats->size() == kMaxCacheSize) { - formats->pop_back(); - // We should really only have at most 2 display/visual combinations: - // one for normal browser windows, and possibly another for an argb window - // created to display a menu. - // - // If we get here it's not fatal, we just need to make sure we aren't - // always blowing away the cache. If we are, then we should figure out why - // and make it bigger. - NOTREACHED(); - } - - return pictformat; -} - -XRenderPictFormat* GetRenderARGB32Format(Display* dpy) { - static XRenderPictFormat* pictformat = NULL; - if (pictformat) - return pictformat; - - // First look for a 32-bit format which ignores the alpha value - XRenderPictFormat templ; - templ.depth = 32; - templ.type = PictTypeDirect; - templ.direct.red = 16; - templ.direct.green = 8; - templ.direct.blue = 0; - templ.direct.redMask = 0xff; - templ.direct.greenMask = 0xff; - templ.direct.blueMask = 0xff; - templ.direct.alphaMask = 0; - - static const unsigned long kMask = - PictFormatType | PictFormatDepth | - PictFormatRed | PictFormatRedMask | - PictFormatGreen | PictFormatGreenMask | - PictFormatBlue | PictFormatBlueMask | - PictFormatAlphaMask; - - pictformat = XRenderFindFormat(dpy, kMask, &templ, 0 /* first result */); - - if (!pictformat) { - // Not all X servers support xRGB32 formats. However, the XRENDER spec says - // that they must support an ARGB32 format, so we can always return that. - pictformat = XRenderFindStandardFormat(dpy, PictStandardARGB32); - CHECK(pictformat) << "XRENDER ARGB32 not supported."; - } - - return pictformat; -} - -XSharedMemoryId AttachSharedMemory(Display* display, int shared_memory_key) { - DCHECK(QuerySharedMemorySupport(display)); - - XShmSegmentInfo shminfo; - memset(&shminfo, 0, sizeof(shminfo)); - shminfo.shmid = shared_memory_key; - - // This function is only called if QuerySharedMemorySupport returned true. In - // which case we've already succeeded in having the X server attach to one of - // our shared memory segments. - if (!XShmAttach(display, &shminfo)) - NOTREACHED(); - - return shminfo.shmseg; -} - -void DetachSharedMemory(Display* display, XSharedMemoryId shmseg) { - DCHECK(QuerySharedMemorySupport(display)); - - XShmSegmentInfo shminfo; - memset(&shminfo, 0, sizeof(shminfo)); - shminfo.shmseg = shmseg; - - if (!XShmDetach(display, &shminfo)) - NOTREACHED(); -} - -XID CreatePictureFromSkiaPixmap(Display* display, XID pixmap) { - XID picture = XRenderCreatePicture( - display, pixmap, GetRenderARGB32Format(display), 0, NULL); - - return picture; -} - -void PutARGBImage(Display* display, void* visual, int depth, XID pixmap, - void* pixmap_gc, const uint8* data, int width, int height) { - // TODO(scherkus): potential performance impact... consider passing in as a - // parameter. - int pixmap_bpp = BitsPerPixelForPixmapDepth(display, depth); - - XImage image; - memset(&image, 0, sizeof(image)); - - image.width = width; - image.height = height; - image.format = ZPixmap; - image.byte_order = LSBFirst; - image.bitmap_unit = 8; - image.bitmap_bit_order = LSBFirst; - image.depth = depth; - image.bits_per_pixel = pixmap_bpp; - image.bytes_per_line = width * pixmap_bpp / 8; - - if (pixmap_bpp == 32) { - image.red_mask = 0xff0000; - image.green_mask = 0xff00; - image.blue_mask = 0xff; - - // If the X server depth is already 32-bits and the color masks match, - // then our job is easy. - Visual* vis = static_cast<Visual*>(visual); - if (image.red_mask == vis->red_mask && - image.green_mask == vis->green_mask && - image.blue_mask == vis->blue_mask) { - image.data = const_cast<char*>(reinterpret_cast<const char*>(data)); - XPutImage(display, pixmap, static_cast<GC>(pixmap_gc), &image, - 0, 0 /* source x, y */, 0, 0 /* dest x, y */, - width, height); - } else { - // Otherwise, we need to shuffle the colors around. Assume red and blue - // need to be swapped. - // - // It's possible to use some fancy SSE tricks here, but since this is the - // slow path anyway, we do it slowly. - - uint8_t* bitmap32 = static_cast<uint8_t*>(malloc(4 * width * height)); - if (!bitmap32) - return; - uint8_t* const orig_bitmap32 = bitmap32; - const uint32_t* bitmap_in = reinterpret_cast<const uint32_t*>(data); - for (int y = 0; y < height; ++y) { - for (int x = 0; x < width; ++x) { - const uint32_t pixel = *(bitmap_in++); - bitmap32[0] = (pixel >> 16) & 0xff; // Red - bitmap32[1] = (pixel >> 8) & 0xff; // Green - bitmap32[2] = pixel & 0xff; // Blue - bitmap32[3] = (pixel >> 24) & 0xff; // Alpha - bitmap32 += 4; - } - } - image.data = reinterpret_cast<char*>(orig_bitmap32); - XPutImage(display, pixmap, static_cast<GC>(pixmap_gc), &image, - 0, 0 /* source x, y */, 0, 0 /* dest x, y */, - width, height); - free(orig_bitmap32); - } - } else if (pixmap_bpp == 16) { - // Some folks have VNC setups which still use 16-bit visuals and VNC - // doesn't include Xrender. - - uint16_t* bitmap16 = static_cast<uint16_t*>(malloc(2 * width * height)); - if (!bitmap16) - return; - uint16_t* const orig_bitmap16 = bitmap16; - const uint32_t* bitmap_in = reinterpret_cast<const uint32_t*>(data); - for (int y = 0; y < height; ++y) { - for (int x = 0; x < width; ++x) { - const uint32_t pixel = *(bitmap_in++); - uint16_t out_pixel = ((pixel >> 8) & 0xf800) | - ((pixel >> 5) & 0x07e0) | - ((pixel >> 3) & 0x001f); - *(bitmap16++) = out_pixel; - } - } - - image.data = reinterpret_cast<char*>(orig_bitmap16); - image.red_mask = 0xf800; - image.green_mask = 0x07e0; - image.blue_mask = 0x001f; - - XPutImage(display, pixmap, static_cast<GC>(pixmap_gc), &image, - 0, 0 /* source x, y */, 0, 0 /* dest x, y */, - width, height); - free(orig_bitmap16); - } else { - CHECK(false) << "Sorry, we don't support your visual depth without " - "Xrender support (depth:" << depth - << " bpp:" << pixmap_bpp << ")"; - } -} - -void FreePicture(Display* display, XID picture) { - XRenderFreePicture(display, picture); -} - -void FreePixmap(Display* display, XID pixmap) { - XFreePixmap(display, pixmap); -} - -// Called on BACKGROUND_X11 thread. -Display* GetSecondaryDisplay() { - static Display* display = NULL; - if (!display) { - display = XOpenDisplay(NULL); - CHECK(display); - } - - return display; -} - -// Called on BACKGROUND_X11 thread. -bool GetWindowGeometry(int* x, int* y, unsigned* width, unsigned* height, - XID window) { - Window root_window, child_window; - unsigned border_width, depth; - int temp; - - if (!XGetGeometry(GetSecondaryDisplay(), window, &root_window, &temp, &temp, - width, height, &border_width, &depth)) - return false; - if (!XTranslateCoordinates(GetSecondaryDisplay(), window, root_window, - 0, 0 /* input x, y */, x, y /* output x, y */, - &child_window)) - return false; - - return true; -} - -// Called on BACKGROUND_X11 thread. -bool GetWindowParent(XID* parent_window, bool* parent_is_root, XID window) { - XID root_window, *children; - unsigned num_children; - - Status s = XQueryTree(GetSecondaryDisplay(), window, &root_window, - parent_window, &children, &num_children); - if (!s) - return false; - - if (children) - XFree(children); - - *parent_is_root = root_window == *parent_window; - return true; -} - -bool GetWindowManagerName(std::string* wm_name) { - DCHECK(wm_name); - int wm_window = 0; - if (!x11_util::GetIntProperty(x11_util::GetX11RootWindow(), - "_NET_SUPPORTING_WM_CHECK", - &wm_window)) { - return false; - } - - // It's possible that a window manager started earlier in this X session left - // a stale _NET_SUPPORTING_WM_CHECK property when it was replaced by a - // non-EWMH window manager, so we trap errors in the following requests to - // avoid crashes (issue 23860). - - // EWMH requires the supporting-WM window to also have a - // _NET_SUPPORTING_WM_CHECK property pointing to itself (to avoid a stale - // property referencing an ID that's been recycled for another window), so we - // check that too. - gdk_error_trap_push(); - int wm_window_property = 0; - bool result = x11_util::GetIntProperty( - wm_window, "_NET_SUPPORTING_WM_CHECK", &wm_window_property); - gdk_flush(); - bool got_error = gdk_error_trap_pop(); - if (got_error || !result || wm_window_property != wm_window) - return false; - - gdk_error_trap_push(); - result = x11_util::GetStringProperty( - static_cast<XID>(wm_window), "_NET_WM_NAME", wm_name); - gdk_flush(); - got_error = gdk_error_trap_pop(); - return !got_error && result; -} - -static cairo_status_t SnapshotCallback( - void *closure, const unsigned char *data, unsigned int length) { - std::vector<unsigned char>* png_representation = - static_cast<std::vector<unsigned char>*>(closure); - - size_t old_size = png_representation->size(); - png_representation->resize(old_size + length); - memcpy(&(*png_representation)[old_size], data, length); - return CAIRO_STATUS_SUCCESS; -} - -void GrabWindowSnapshot(GtkWindow* gtk_window, - std::vector<unsigned char>* png_representation) { - GdkWindow* gdk_window = GTK_WIDGET(gtk_window)->window; - Display* display = GDK_WINDOW_XDISPLAY(gdk_window); - XID win = GDK_WINDOW_XID(gdk_window); - XWindowAttributes attr; - if (XGetWindowAttributes(display, win, &attr) != 0) { - LOG(ERROR) << "Couldn't get window attributes"; - return; - } - XImage* image = XGetImage( - display, win, 0, 0, attr.width, attr.height, AllPlanes, ZPixmap); - if (!image) { - LOG(ERROR) << "Couldn't get image"; - return; - } - if (image->depth != 24) { - LOG(ERROR)<< "Unsupported image depth " << image->depth; - return; - } - cairo_surface_t* surface = - cairo_image_surface_create_for_data( - reinterpret_cast<unsigned char*>(image->data), - CAIRO_FORMAT_RGB24, - image->width, - image->height, - image->bytes_per_line); - - if (!surface) { - LOG(ERROR) << "Unable to create Cairo surface from XImage data"; - return; - } - cairo_surface_write_to_png_stream( - surface, SnapshotCallback, png_representation); - cairo_surface_destroy(surface); -} - -bool ChangeWindowDesktop(XID window, XID destination) { - int desktop; - if (!GetIntProperty(destination, "_NET_WM_DESKTOP", &desktop)) - return false; - - XEvent event; - event.xclient.type = ClientMessage; - event.xclient.window = window; - event.xclient.message_type = gdk_x11_get_xatom_by_name_for_display( - gdk_display_get_default(), "_NET_WM_DESKTOP"); - event.xclient.format = 32; - event.xclient.data.l[0] = desktop; - event.xclient.data.l[1] = 1; // source indication - - int result = XSendEvent(GetXDisplay(), GetX11RootWindow(), False, - SubstructureNotifyMask, &event); - return result == Success; -} - -} // namespace x11_util |