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duckstation/src/util/x11_tools.cpp

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// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
// SPDX-License-Identifier: CC-BY-NC-ND-4.0
#include "x11_tools.h"
#include "window_info.h"
#include "common/assert.h"
#include "common/dynamic_library.h"
#include "common/error.h"
#include "common/log.h"
#include "common/scoped_guard.h"
#include <X11/Xlib-xcb.h>
#include <xcb/randr.h>
#include <xcb/xcb.h>
#include <memory>
LOG_CHANNEL(WindowInfo);
namespace {
namespace dyn_libs {
#define XCB_FUNCTIONS(X) \
X(xcb_get_geometry) \
X(xcb_get_geometry_reply) \
X(xcb_get_setup) \
X(xcb_setup_roots_iterator) \
X(xcb_screen_next) \
X(xcb_screen_allowed_depths_iterator) \
X(xcb_depth_next) \
X(xcb_depth_visuals_length) \
X(xcb_depth_visuals) \
X(xcb_generate_id) \
X(xcb_request_check) \
X(xcb_create_colormap_checked) \
X(xcb_create_window_checked) \
X(xcb_map_window_checked) \
X(xcb_unmap_window_checked) \
X(xcb_destroy_window_checked) \
X(xcb_free_colormap_checked) \
X(xcb_configure_window_checked)
#define XCB_RANDR_FUNCTIONS(X) \
X(xcb_randr_get_screen_resources_reply) \
X(xcb_randr_get_screen_resources) \
X(xcb_randr_get_monitors_reply) \
X(xcb_randr_get_monitors) \
X(xcb_randr_get_monitors_monitors_iterator) \
X(xcb_randr_monitor_info_outputs) \
X(xcb_randr_get_output_info_reply) \
X(xcb_randr_get_output_info) \
X(xcb_randr_get_crtc_info_reply) \
X(xcb_randr_get_crtc_info) \
X(xcb_randr_get_screen_resources_modes_iterator) \
X(xcb_randr_mode_info_next)
#define X11XCB_FUNCTIONS(X) X(XGetXCBConnection)
static bool OpenXcb(Error* error);
static void CloseXcb();
static bool OpenXcbRandR(Error* error);
static void CloseXcbRandR();
static bool OpenX11Xcb(Error* error);
static void CloseX11Xcb();
static void CloseAll();
static DynamicLibrary s_xcb_library;
static DynamicLibrary s_xcb_randr_library;
static DynamicLibrary s_x11xcb_library;
static bool s_close_registered = false;
#define ADD_FUNC(F) static decltype(&::F) F;
XCB_FUNCTIONS(ADD_FUNC);
XCB_RANDR_FUNCTIONS(ADD_FUNC);
X11XCB_FUNCTIONS(ADD_FUNC);
#undef ADD_FUNC
} // namespace dyn_libs
template<typename T>
struct XCBPointerDeleter
{
void operator()(T* ptr) { free(ptr); }
};
template<typename T>
using XCBPointer = std::unique_ptr<T, XCBPointerDeleter<T>>;
} // namespace
bool dyn_libs::OpenXcb(Error* error)
{
if (s_xcb_library.IsOpen())
return true;
const std::string libname = DynamicLibrary::GetVersionedFilename("xcb", 1);
if (!s_xcb_library.Open(libname.c_str(), error))
{
Error::AddPrefix(error, "Failed to load xcb: ");
return false;
}
#define LOAD_FUNC(F) \
if (!s_xcb_library.GetSymbol(#F, &F)) \
{ \
Error::SetStringFmt(error, "Failed to find function {}", #F); \
CloseXcb(); \
return false; \
}
XCB_FUNCTIONS(LOAD_FUNC)
#undef LOAD_FUNC
if (!s_close_registered)
{
s_close_registered = true;
std::atexit(&dyn_libs::CloseAll);
}
return true;
}
void dyn_libs::CloseXcb()
{
#define UNLOAD_FUNC(F) F = nullptr;
XCB_FUNCTIONS(UNLOAD_FUNC)
#undef UNLOAD_FUNC
s_xcb_library.Close();
}
bool dyn_libs::OpenXcbRandR(Error* error)
{
if (s_xcb_randr_library.IsOpen())
return true;
const std::string libname = DynamicLibrary::GetVersionedFilename("xcb-randr", 0);
if (!s_xcb_randr_library.Open(libname.c_str(), error))
{
Error::AddPrefix(error, "Failed to load xcb-randr: ");
return false;
}
#define LOAD_FUNC(F) \
if (!s_xcb_randr_library.GetSymbol(#F, &F)) \
{ \
Error::SetStringFmt(error, "Failed to find function {}", #F); \
CloseXcb(); \
return false; \
}
XCB_RANDR_FUNCTIONS(LOAD_FUNC)
#undef LOAD_FUNC
if (!s_close_registered)
{
s_close_registered = true;
std::atexit(&dyn_libs::CloseAll);
}
return true;
}
void dyn_libs::CloseXcbRandR()
{
#define UNLOAD_FUNC(F) F = nullptr;
XCB_RANDR_FUNCTIONS(UNLOAD_FUNC)
#undef UNLOAD_FUNC
s_xcb_randr_library.Close();
}
bool dyn_libs::OpenX11Xcb(Error* error)
{
if (s_x11xcb_library.IsOpen())
return true;
const std::string libname = DynamicLibrary::GetVersionedFilename("X11-xcb", 1);
if (!s_x11xcb_library.Open(libname.c_str(), error))
{
Error::AddPrefix(error, "Failed to load X11-xcb: ");
return false;
}
#define LOAD_FUNC(F) \
if (!s_x11xcb_library.GetSymbol(#F, &F)) \
{ \
Error::SetStringFmt(error, "Failed to find function {}", #F); \
CloseXcb(); \
return false; \
}
X11XCB_FUNCTIONS(LOAD_FUNC)
#undef LOAD_FUNC
if (!s_close_registered)
{
s_close_registered = true;
std::atexit(&dyn_libs::CloseAll);
}
return true;
}
void dyn_libs::CloseX11Xcb()
{
#define UNLOAD_FUNC(F) F = nullptr;
X11XCB_FUNCTIONS(UNLOAD_FUNC)
#undef UNLOAD_FUNC
s_x11xcb_library.Close();
}
void dyn_libs::CloseAll()
{
CloseX11Xcb();
CloseXcbRandR();
CloseXcb();
}
X11Window::X11Window() = default;
X11Window::X11Window(X11Window&& move)
{
m_connection = move.m_connection;
m_parent_window = move.m_parent_window;
m_window = move.m_window;
m_colormap = move.m_colormap;
m_width = move.m_width;
m_height = move.m_height;
move.m_connection = nullptr;
move.m_parent_window = {};
move.m_window = {};
move.m_colormap = {};
move.m_width = 0;
move.m_height = 0;
}
X11Window::~X11Window()
{
Destroy();
}
X11Window& X11Window::operator=(X11Window&& move)
{
m_connection = move.m_connection;
m_parent_window = move.m_parent_window;
m_window = move.m_window;
m_colormap = move.m_colormap;
m_width = move.m_width;
m_height = move.m_height;
move.m_connection = nullptr;
move.m_parent_window = {};
move.m_window = {};
move.m_colormap = {};
move.m_width = 0;
move.m_height = 0;
return *this;
}
static void SetErrorObject(Error* error, const char* prefix, const xcb_generic_error_t* xerror)
{
Error::SetStringFmt(error, "{} failed: EC={} Major={} Minor={} Resource={:X}", xerror->error_code,
xerror->response_type, xerror->major_code, xerror->minor_code, xerror->resource_id);
}
bool X11Window::Create(xcb_connection_t* connection, xcb_window_t parent_window, xcb_visualid_t vi, Error* error)
{
xcb_generic_error_t* xerror;
if (!dyn_libs::OpenXcb(error))
return false;
m_connection = connection;
m_parent_window = parent_window;
XCBPointer<xcb_get_geometry_reply_t> gwa(
dyn_libs::xcb_get_geometry_reply(connection, dyn_libs::xcb_get_geometry(connection, parent_window), &xerror));
if (!gwa)
{
SetErrorObject(error, "xcb_get_geometry_reply() failed: ", xerror);
return false;
}
m_width = gwa->width;
m_height = gwa->height;
// Need to find the root window to get an appropriate depth. Needed for NVIDIA+XWayland.
int visual_depth = XCB_COPY_FROM_PARENT;
for (xcb_screen_iterator_t it = dyn_libs::xcb_setup_roots_iterator(dyn_libs::xcb_get_setup(connection)); it.rem != 0;
dyn_libs::xcb_screen_next(&it))
{
if (it.data->root == gwa->root)
{
for (xcb_depth_iterator_t dit = dyn_libs::xcb_screen_allowed_depths_iterator(it.data); dit.rem != 0;
dyn_libs::xcb_depth_next(&dit))
{
const int len = dyn_libs::xcb_depth_visuals_length(dit.data);
const xcb_visualtype_t* visuals = dyn_libs::xcb_depth_visuals(dit.data);
int idx = 0;
for (; idx < len; idx++)
{
if (vi == visuals[idx].visual_id)
{
visual_depth = dit.data->depth;
break;
}
}
}
break;
}
}
if (visual_depth == XCB_COPY_FROM_PARENT)
WARNING_LOG("Could not find visual's depth.");
// ID isn't "used" until the call succeeds.
m_colormap = dyn_libs::xcb_generate_id(connection);
if ((xerror = dyn_libs::xcb_request_check(
connection,
dyn_libs::xcb_create_colormap_checked(connection, XCB_COLORMAP_ALLOC_NONE, m_colormap, parent_window, vi))))
{
SetErrorObject(error, "xcb_create_colormap_checked() failed: ", xerror);
m_colormap = {};
return false;
}
m_window = dyn_libs::xcb_generate_id(connection);
const u32 window_values[] = {XCB_PIXMAP_NONE, 0u, m_colormap};
xerror = dyn_libs::xcb_request_check(
connection,
dyn_libs::xcb_create_window_checked(connection, visual_depth, m_window, parent_window, 0, 0, m_width, m_height, 0,
XCB_WINDOW_CLASS_INPUT_OUTPUT, vi,
XCB_CW_BACK_PIXMAP | XCB_CW_BORDER_PIXEL | XCB_CW_COLORMAP, window_values));
if (xerror)
{
SetErrorObject(error, "xcb_create_window_checked() failed: ", xerror);
m_window = {};
return false;
}
xerror = dyn_libs::xcb_request_check(connection, dyn_libs::xcb_map_window_checked(connection, m_window));
if (xerror)
{
SetErrorObject(error, "xcb_map_window_checked() failed: ", xerror);
return false;
}
return true;
}
void X11Window::Destroy()
{
xcb_generic_error_t* xerror;
Error error;
if (m_window)
{
if ((xerror =
dyn_libs::xcb_request_check(m_connection, dyn_libs::xcb_unmap_window_checked(m_connection, m_window))))
{
SetErrorObject(&error, "xcb_unmap_window_checked() failed: ", xerror);
ERROR_LOG(error.GetDescription());
}
if ((xerror =
dyn_libs::xcb_request_check(m_connection, dyn_libs::xcb_destroy_window_checked(m_connection, m_window))))
{
SetErrorObject(&error, "xcb_destroy_window_checked() failed: ", xerror);
ERROR_LOG(error.GetDescription());
}
m_window = {};
m_parent_window = {};
}
if (m_colormap)
{
if ((xerror =
dyn_libs::xcb_request_check(m_connection, dyn_libs::xcb_free_colormap_checked(m_connection, m_colormap))))
{
SetErrorObject(&error, "xcb_free_colormap_checked() failed: ", xerror);
ERROR_LOG(error.GetDescription());
}
m_colormap = {};
}
}
void X11Window::Resize(u16 width, u16 height)
{
xcb_generic_error_t* xerror;
Error error;
if (width != 0 && height != 0)
{
m_width = width;
m_height = height;
}
else
{
XCBPointer<xcb_get_geometry_reply_t> gwa(dyn_libs::xcb_get_geometry_reply(
m_connection, dyn_libs::xcb_get_geometry(m_connection, m_parent_window), &xerror));
if (!gwa)
{
SetErrorObject(&error, "xcb_get_geometry() failed: ", xerror);
ERROR_LOG(error.GetDescription());
return;
}
m_width = gwa->width;
m_height = gwa->height;
}
u32 values[] = {width, height};
if ((xerror = dyn_libs::xcb_request_check(
m_connection, dyn_libs::xcb_configure_window_checked(
m_connection, m_window, XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT, values))))
{
SetErrorObject(&error, "xcb_configure_window_checked() failed: ", xerror);
ERROR_LOG(error.GetDescription());
}
}
std::optional<float> GetRefreshRateFromXRandR(const WindowInfo& wi, Error* error)
{
xcb_connection_t* connection = nullptr;
if (wi.type == WindowInfo::Type::Xlib)
{
if (!dyn_libs::OpenX11Xcb(error))
return std::nullopt;
connection = dyn_libs::XGetXCBConnection(static_cast<Display*>(wi.display_connection));
}
else if (wi.type == WindowInfo::Type::XCB)
{
connection = static_cast<xcb_connection_t*>(wi.display_connection);
}
xcb_window_t window = static_cast<xcb_window_t>(reinterpret_cast<uintptr_t>(wi.window_handle));
if (!connection || window == XCB_NONE)
{
Error::SetStringView(error, "Invalid window handle.");
return std::nullopt;
}
if (!dyn_libs::OpenXcb(error) || !dyn_libs::OpenXcbRandR(error))
return std::nullopt;
xcb_generic_error_t* xerror;
XCBPointer<xcb_randr_get_screen_resources_reply_t> gsr(dyn_libs::xcb_randr_get_screen_resources_reply(
connection, dyn_libs::xcb_randr_get_screen_resources(connection, window), &xerror));
if (xerror)
{
SetErrorObject(error, "xcb_randr_get_screen_resources() failed: ", xerror);
return std::nullopt;
}
XCBPointer<xcb_randr_get_monitors_reply_t> gm(dyn_libs::xcb_randr_get_monitors_reply(
connection, dyn_libs::xcb_randr_get_monitors(connection, window, true), &xerror));
if (xerror || gm->nMonitors < 0)
{
SetErrorObject(error, "xcb_randr_get_screen_resources() failed: ", xerror);
return std::nullopt;
}
if (gm->nMonitors > 1)
WARNING_LOG("xcb_randr_get_monitors() returned {} monitors, using first", gm->nMonitors);
if (gm->nOutputs <= 0)
{
Error::SetStringView(error, "Monitor has no outputs");
return std::nullopt;
}
else if (gm->nOutputs > 1)
{
WARNING_LOG("Monitor has {} outputs, using first", gm->nOutputs);
}
xcb_randr_monitor_info_t* monitor_info = dyn_libs::xcb_randr_get_monitors_monitors_iterator(gm.get()).data;
DebugAssert(monitor_info);
xcb_randr_output_t* monitor_outputs = dyn_libs::xcb_randr_monitor_info_outputs(monitor_info);
DebugAssert(monitor_outputs);
XCBPointer<xcb_randr_get_output_info_reply_t> goi(dyn_libs::xcb_randr_get_output_info_reply(
connection, dyn_libs::xcb_randr_get_output_info(connection, monitor_outputs[0], 0), &xerror));
if (xerror)
{
SetErrorObject(error, "xcb_randr_get_output_info() failed: ", xerror);
return std::nullopt;
}
XCBPointer<xcb_randr_get_crtc_info_reply_t> gci(dyn_libs::xcb_randr_get_crtc_info_reply(
connection, dyn_libs::xcb_randr_get_crtc_info(connection, goi->crtc, 0), &xerror));
if (xerror)
{
SetErrorObject(error, "xcb_randr_get_crtc_info_reply() failed: ", xerror);
return std::nullopt;
}
xcb_randr_mode_info_t* mode = nullptr;
for (xcb_randr_mode_info_iterator_t it = dyn_libs::xcb_randr_get_screen_resources_modes_iterator(gsr.get());
it.rem != 0; dyn_libs::xcb_randr_mode_info_next(&it))
{
if (it.data->id == gci->mode)
{
mode = it.data;
break;
}
}
if (!mode)
{
Error::SetStringFmt(error, "Failed to look up mode ID {}", static_cast<int>(gci->mode));
return std::nullopt;
}
if (mode->dot_clock == 0 || mode->htotal == 0 || mode->vtotal == 0)
{
ERROR_LOG("Modeline is invalid: {}/{}/{}", mode->dot_clock, mode->htotal, mode->vtotal);
return std::nullopt;
}
return static_cast<float>(static_cast<double>(mode->dot_clock) /
(static_cast<double>(mode->htotal) * static_cast<double>(mode->vtotal)));
}
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