| // Copyright 2018 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. |
| |
| #include "ui/base/x/x11_display_util.h" |
| |
| #include <dlfcn.h> |
| |
| #include <bitset> |
| |
| #include "base/bits.h" |
| #include "base/compiler_specific.h" |
| #include "base/logging.h" |
| #include "ui/base/x/x11_util.h" |
| #include "ui/display/util/display_util.h" |
| #include "ui/display/util/edid_parser.h" |
| #include "ui/gfx/color_space.h" |
| #include "ui/gfx/geometry/matrix3_f.h" |
| #include "ui/gfx/geometry/rect.h" |
| #include "ui/gfx/geometry/vector3d_f.h" |
| #include "ui/gfx/x/x11.h" |
| #include "ui/gfx/x/x11_atom_cache.h" |
| |
| namespace ui { |
| |
| namespace { |
| |
| constexpr int kMinVersionXrandr = 103; // Need at least xrandr version 1.3. |
| |
| typedef XRRMonitorInfo* (*XRRGetMonitors)(::Display*, Window, bool, int*); |
| typedef void (*XRRFreeMonitors)(XRRMonitorInfo*); |
| |
| NO_SANITIZE("cfi-icall") |
| std::map<RROutput, int> GetMonitors(int version, |
| XDisplay* xdisplay, |
| GLXWindow window) { |
| std::map<RROutput, int> output_to_monitor; |
| if (version >= 105) { |
| void* xrandr_lib = dlopen(nullptr, RTLD_NOW); |
| if (xrandr_lib) { |
| static XRRGetMonitors XRRGetMonitors_ptr = |
| reinterpret_cast<XRRGetMonitors>(dlsym(xrandr_lib, "XRRGetMonitors")); |
| static XRRFreeMonitors XRRFreeMonitors_ptr = |
| reinterpret_cast<XRRFreeMonitors>( |
| dlsym(xrandr_lib, "XRRFreeMonitors")); |
| if (XRRGetMonitors_ptr && XRRFreeMonitors_ptr) { |
| int nmonitors = 0; |
| XRRMonitorInfo* monitors = |
| XRRGetMonitors_ptr(xdisplay, window, false, &nmonitors); |
| for (int monitor = 0; monitor < nmonitors; monitor++) { |
| for (int j = 0; j < monitors[monitor].noutput; j++) { |
| output_to_monitor[monitors[monitor].outputs[j]] = monitor; |
| } |
| } |
| XRRFreeMonitors_ptr(monitors); |
| } |
| } |
| } |
| return output_to_monitor; |
| } |
| |
| // Sets the work area on a list of displays. The work area for each display |
| // must already be initialized to the display bounds. At most one display out |
| // of |displays| will be affected. |
| void ClipWorkArea(std::vector<display::Display>* displays, |
| int64_t primary_display_index, |
| float scale) { |
| XDisplay* xdisplay = gfx::GetXDisplay(); |
| GLXWindow x_root_window = DefaultRootWindow(xdisplay); |
| |
| std::vector<int> value; |
| if (!ui::GetIntArrayProperty(x_root_window, "_NET_WORKAREA", &value) || |
| value.size() < 4) { |
| return; |
| } |
| gfx::Rect work_area = gfx::ScaleToEnclosingRect( |
| gfx::Rect(value[0], value[1], value[2], value[3]), 1.0f / scale); |
| |
| // If the work area entirely contains exactly one display, assume it's meant |
| // for that display (and so do nothing). |
| if (std::count_if(displays->begin(), displays->end(), |
| [&](const display::Display& display) { |
| return work_area.Contains(display.bounds()); |
| }) == 1) { |
| return; |
| } |
| |
| // If the work area is entirely contained within exactly one display, assume |
| // it's meant for that display and intersect the work area with only that |
| // display. |
| auto found = std::find_if(displays->begin(), displays->end(), |
| [&](const display::Display& display) { |
| return display.bounds().Contains(work_area); |
| }); |
| |
| // If the work area spans multiple displays, intersect the work area with the |
| // primary display, like GTK does. |
| display::Display& primary = |
| found == displays->end() ? (*displays)[primary_display_index] : *found; |
| |
| work_area.Intersect(primary.work_area()); |
| if (!work_area.IsEmpty()) |
| primary.set_work_area(work_area); |
| } |
| |
| float GetRefreshRateFromXRRModeInfo(XRRModeInfo* modes, |
| int num_of_mode, |
| RRMode current_mode_id) { |
| for (int i = 0; i < num_of_mode; i++) { |
| XRRModeInfo mode_info = modes[i]; |
| if (mode_info.id != current_mode_id) |
| continue; |
| if (!mode_info.hTotal || !mode_info.vTotal) |
| return 0; |
| |
| // Refresh Rate = Pixel Clock / (Horizontal Total * Vertical Total) |
| return mode_info.dotClock / |
| static_cast<float>(mode_info.hTotal * mode_info.vTotal); |
| } |
| return 0; |
| } |
| |
| int DefaultScreenDepth(XDisplay* xdisplay) { |
| return DefaultDepth(xdisplay, DefaultScreen(xdisplay)); |
| } |
| |
| int DefaultBitsPerComponent(XDisplay* xdisplay) { |
| Visual* visual = DefaultVisual(xdisplay, DefaultScreen(xdisplay)); |
| |
| // The mask fields are only valid for DirectColor and TrueColor classes. |
| if (visual->c_class == DirectColor || visual->c_class == TrueColor) { |
| // RGB components are packed into fixed size integers for each visual. The |
| // layout of bits in the packing is given by |
| // |visual->{red,green,blue}_mask|. Count the number of bits to get the |
| // number of bits per component. |
| auto bits = [](auto mask) { |
| return std::bitset<sizeof(mask) * 8>{mask}.count(); |
| }; |
| size_t red_bits = bits(visual->red_mask); |
| size_t green_bits = bits(visual->green_mask); |
| size_t blue_bits = bits(visual->blue_mask); |
| if (red_bits == green_bits && red_bits == blue_bits) |
| return red_bits; |
| } |
| |
| // Next, try getting the number of colormap entries per subfield. If it's a |
| // power of 2, log2 is a possible guess for the number of bits per component. |
| if (base::bits::IsPowerOfTwo(visual->map_entries)) |
| return base::bits::Log2Ceiling(visual->map_entries); |
| |
| // |bits_per_rgb| can sometimes be unreliable (may be 11 for 30bpp visuals), |
| // so only use it as a last resort. |
| return visual->bits_per_rgb; |
| } |
| |
| bool IsRandRAvailable() { |
| int randr_version_major = 0; |
| int randr_version_minor = 0; |
| static bool is_randr_available = XRRQueryVersion( |
| gfx::GetXDisplay(), &randr_version_major, &randr_version_minor); |
| return is_randr_available; |
| } |
| |
| // Get the EDID data from the |output| and stores to |edid|. |
| void GetEDIDProperty(XID output, std::vector<uint8_t>* edid) { |
| if (!IsRandRAvailable()) |
| return; |
| |
| Display* display = gfx::GetXDisplay(); |
| |
| Atom edid_property = gfx::GetAtom(RR_PROPERTY_RANDR_EDID); |
| |
| bool has_edid_property = false; |
| int num_properties = 0; |
| gfx::XScopedPtr<Atom[]> properties( |
| XRRListOutputProperties(display, output, &num_properties)); |
| for (int i = 0; i < num_properties; ++i) { |
| if (properties[i] == edid_property) { |
| has_edid_property = true; |
| break; |
| } |
| } |
| if (!has_edid_property) |
| return; |
| |
| Atom actual_type; |
| int actual_format; |
| unsigned long bytes_after; |
| unsigned long nitems = 0; |
| unsigned char* prop = nullptr; |
| XRRGetOutputProperty(display, output, edid_property, |
| 0, // offset |
| 128, // length |
| false, // _delete |
| false, // pending |
| AnyPropertyType, // req_type |
| &actual_type, &actual_format, &nitems, &bytes_after, |
| &prop); |
| DCHECK_EQ(XA_INTEGER, actual_type); |
| DCHECK_EQ(8, actual_format); |
| edid->assign(prop, prop + nitems); |
| XFree(prop); |
| } |
| |
| } // namespace |
| |
| int GetXrandrVersion(XDisplay* xdisplay) { |
| int xrandr_version = 0; |
| // We only support 1.3+. There were library changes before this and we should |
| // use the new interface instead of the 1.2 one. |
| int randr_version_major = 0; |
| int randr_version_minor = 0; |
| if (XRRQueryVersion(xdisplay, &randr_version_major, &randr_version_minor)) { |
| xrandr_version = randr_version_major * 100 + randr_version_minor; |
| } |
| return xrandr_version; |
| } |
| |
| std::vector<display::Display> GetFallbackDisplayList(float scale) { |
| XDisplay* display = gfx::GetXDisplay(); |
| ::Screen* screen = DefaultScreenOfDisplay(display); |
| gfx::Size physical_size(WidthMMOfScreen(screen), HeightMMOfScreen(screen)); |
| |
| int width = WidthOfScreen(screen); |
| int height = HeightOfScreen(screen); |
| gfx::Rect bounds_in_pixels(0, 0, width, height); |
| display::Display gfx_display(0, bounds_in_pixels); |
| |
| if (!display::Display::HasForceDeviceScaleFactor() && |
| !display::IsDisplaySizeBlackListed(physical_size)) { |
| DCHECK_LE(1.0f, scale); |
| gfx_display.SetScaleAndBounds(scale, bounds_in_pixels); |
| gfx_display.set_work_area( |
| gfx::ScaleToEnclosingRect(bounds_in_pixels, 1.0f / scale)); |
| } else { |
| scale = 1; |
| } |
| |
| gfx_display.set_color_depth(DefaultScreenDepth(display)); |
| gfx_display.set_depth_per_component(DefaultBitsPerComponent(display)); |
| |
| std::vector<display::Display> displays{gfx_display}; |
| ClipWorkArea(&displays, 0, scale); |
| return displays; |
| } |
| |
| std::vector<display::Display> BuildDisplaysFromXRandRInfo( |
| int version, |
| float scale, |
| int64_t* primary_display_index_out) { |
| DCHECK(primary_display_index_out); |
| DCHECK_GE(version, kMinVersionXrandr); |
| XDisplay* xdisplay = gfx::GetXDisplay(); |
| GLXWindow x_root_window = DefaultRootWindow(xdisplay); |
| std::vector<display::Display> displays; |
| gfx::XScopedPtr< |
| XRRScreenResources, |
| gfx::XObjectDeleter<XRRScreenResources, void, XRRFreeScreenResources>> |
| resources(XRRGetScreenResourcesCurrent(xdisplay, x_root_window)); |
| if (!resources) { |
| LOG(ERROR) << "XRandR returned no displays; falling back to root window"; |
| return GetFallbackDisplayList(scale); |
| } |
| |
| const int depth = DefaultScreenDepth(xdisplay); |
| const int bits_per_component = DefaultBitsPerComponent(xdisplay); |
| |
| std::map<RROutput, int> output_to_monitor = |
| GetMonitors(version, xdisplay, x_root_window); |
| *primary_display_index_out = 0; |
| RROutput primary_display_id = XRRGetOutputPrimary(xdisplay, x_root_window); |
| |
| int explicit_primary_display_index = -1; |
| int monitor_order_primary_display_index = -1; |
| |
| // As per-display scale factor is not supported right now, |
| // the X11 root window's scale factor is always used. |
| for (int i = 0; i < resources->noutput; ++i) { |
| RROutput output_id = resources->outputs[i]; |
| gfx::XScopedPtr<XRROutputInfo, |
| gfx::XObjectDeleter<XRROutputInfo, void, XRRFreeOutputInfo>> |
| output_info(XRRGetOutputInfo(xdisplay, resources.get(), output_id)); |
| |
| // XRRGetOutputInfo returns null in some cases: https://crbug.com/921490 |
| if (!output_info) |
| continue; |
| |
| bool is_connected = (output_info->connection == RR_Connected); |
| if (!is_connected) |
| continue; |
| |
| bool is_primary_display = (output_id == primary_display_id); |
| |
| if (output_info->crtc) { |
| gfx::XScopedPtr<XRRCrtcInfo, |
| gfx::XObjectDeleter<XRRCrtcInfo, void, XRRFreeCrtcInfo>> |
| crtc(XRRGetCrtcInfo(xdisplay, resources.get(), output_info->crtc)); |
| |
| std::vector<uint8_t> edid_bytes; |
| GetEDIDProperty(output_id, &edid_bytes); |
| display::EdidParser edid_parser(edid_bytes); |
| int64_t display_id = edid_parser.GetDisplayId(output_id); |
| // It isn't ideal, but if we can't parse the EDID data, fall back on the |
| // display number. |
| if (!display_id) |
| display_id = i; |
| |
| gfx::Rect crtc_bounds(crtc->x, crtc->y, crtc->width, crtc->height); |
| display::Display display(display_id, crtc_bounds); |
| |
| if (!display::Display::HasForceDeviceScaleFactor()) { |
| display.SetScaleAndBounds(scale, crtc_bounds); |
| display.set_work_area( |
| gfx::ScaleToEnclosingRect(crtc_bounds, 1.0f / scale)); |
| } |
| |
| switch (crtc->rotation) { |
| case RR_Rotate_0: |
| display.set_rotation(display::Display::ROTATE_0); |
| break; |
| case RR_Rotate_90: |
| display.set_rotation(display::Display::ROTATE_90); |
| break; |
| case RR_Rotate_180: |
| display.set_rotation(display::Display::ROTATE_180); |
| break; |
| case RR_Rotate_270: |
| display.set_rotation(display::Display::ROTATE_270); |
| break; |
| } |
| |
| if (is_primary_display) |
| explicit_primary_display_index = displays.size(); |
| |
| auto monitor_iter = output_to_monitor.find(output_id); |
| if (monitor_iter != output_to_monitor.end() && monitor_iter->second == 0) |
| monitor_order_primary_display_index = displays.size(); |
| |
| if (!display::Display::HasForceDisplayColorProfile()) { |
| gfx::ICCProfile icc_profile = ui::GetICCProfileForMonitor( |
| monitor_iter == output_to_monitor.end() ? 0 : monitor_iter->second); |
| gfx::ColorSpace color_space = icc_profile.GetPrimariesOnlyColorSpace(); |
| |
| // Most folks do not have an ICC profile set up, but we still want to |
| // detect if a display has a wide color gamut so that HDR videos can be |
| // enabled. Only do this if |bits_per_component| > 8 or else SDR |
| // screens may have washed out colors. |
| if (bits_per_component > 8 && !color_space.IsValid()) |
| color_space = display::GetColorSpaceFromEdid(edid_parser); |
| |
| display.set_color_spaces( |
| gfx::DisplayColorSpaces(color_space, gfx::BufferFormat::BGRA_8888)); |
| } |
| |
| display.set_color_depth(depth); |
| display.set_depth_per_component(bits_per_component); |
| |
| // Set monitor refresh rate |
| int refresh_rate = static_cast<int>(GetRefreshRateFromXRRModeInfo( |
| resources->modes, resources->nmode, crtc->mode)); |
| display.set_display_frequency(refresh_rate); |
| |
| displays.push_back(display); |
| } |
| } |
| |
| if (explicit_primary_display_index != -1) { |
| *primary_display_index_out = explicit_primary_display_index; |
| } else if (monitor_order_primary_display_index != -1) { |
| *primary_display_index_out = monitor_order_primary_display_index; |
| } |
| |
| if (displays.empty()) |
| return GetFallbackDisplayList(scale); |
| |
| ClipWorkArea(&displays, *primary_display_index_out, scale); |
| return displays; |
| } |
| |
| base::TimeDelta GetPrimaryDisplayRefreshIntervalFromXrandr(Display* display) { |
| constexpr base::TimeDelta kDefaultInterval = |
| base::TimeDelta::FromSecondsD(1. / 60); |
| GLXWindow root = DefaultRootWindow(display); |
| gfx::XScopedPtr< |
| XRRScreenResources, |
| gfx::XObjectDeleter<XRRScreenResources, void, XRRFreeScreenResources>> |
| resources(XRRGetScreenResourcesCurrent(display, root)); |
| if (!resources) |
| return kDefaultInterval; |
| // TODO(crbug.com/726842): It might make sense here to pick the output that |
| // the window is on. On the other hand, if compositing is enabled, all drawing |
| // might be synced to the primary output anyway. Needs investigation. |
| RROutput primary_output = XRRGetOutputPrimary(display, root); |
| bool disconnected_primary = false; |
| for (int i = 0; i < resources->noutput; i++) { |
| if (!disconnected_primary && resources->outputs[i] != primary_output) |
| continue; |
| |
| gfx::XScopedPtr<XRROutputInfo, |
| gfx::XObjectDeleter<XRROutputInfo, void, XRRFreeOutputInfo>> |
| output_info(XRRGetOutputInfo(display, resources.get(), primary_output)); |
| if (!output_info) |
| continue; |
| |
| if (output_info->connection != RR_Connected) { |
| // If the primary monitor is disconnected, then start over and choose the |
| // first connected monitor instead. |
| if (!disconnected_primary) { |
| disconnected_primary = true; |
| i = -1; |
| } |
| continue; |
| } |
| gfx::XScopedPtr<XRRCrtcInfo, |
| gfx::XObjectDeleter<XRRCrtcInfo, void, XRRFreeCrtcInfo>> |
| crtc(XRRGetCrtcInfo(display, resources.get(), output_info->crtc)); |
| if (!crtc) |
| continue; |
| float refresh_rate = GetRefreshRateFromXRRModeInfo( |
| resources->modes, resources->nmode, crtc->mode); |
| if (refresh_rate == 0) |
| continue; |
| |
| return base::TimeDelta::FromSecondsD(1. / refresh_rate); |
| } |
| return kDefaultInterval; |
| } |
| |
| } // namespace ui |
