91 lines
2.8 KiB
C++
91 lines
2.8 KiB
C++
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// Copyright 2018 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include "base/command_line.h"
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#include "base/logging.h"
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#include "base/strings/string_number_conversions.h"
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#include "brillo/syslog_logging.h"
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constexpr char kBgColorFlag[] = "bgcolor";
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constexpr char kWidthFlag[] = "width";
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constexpr char kHeightFlag[] = "height";
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constexpr char kTitleFlag[] = "title";
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// Creates an X window the same size as the display and fills its background
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// with a solid color that can be specified as the only parameter (in hex or
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// base 10). Closes on any keypress.
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int main(int argc, char* argv[]) {
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brillo::InitLog(brillo::kLogToSyslog);
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LOG(INFO) << "Starting x11_demo application";
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base::CommandLine::Init(argc, argv);
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base::CommandLine* cl = base::CommandLine::ForCurrentProcess();
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uint32_t bgcolor = 0x99EE44;
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if (cl->HasSwitch(kBgColorFlag)) {
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bgcolor =
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strtoul(cl->GetSwitchValueASCII(kBgColorFlag).c_str(), nullptr, 0);
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}
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std::string title = "x11_demo";
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if (cl->HasSwitch(kTitleFlag)) {
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title = cl->GetSwitchValueASCII(kTitleFlag);
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}
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Display* dpy = XOpenDisplay(nullptr);
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if (!dpy) {
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LOG(ERROR) << "Failed opening display";
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return -1;
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}
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int screen = DefaultScreen(dpy);
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Window win;
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int x, y;
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unsigned int width, height, border, depth;
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if (XGetGeometry(dpy, RootWindow(dpy, screen), &win, &x, &y, &width, &height,
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&border, &depth) == 0) {
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LOG(ERROR) << "Failed getting screen geometry";
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return -1;
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}
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if (cl->HasSwitch(kWidthFlag)) {
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if (!base::StringToUint(cl->GetSwitchValueASCII(kWidthFlag), &width)) {
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LOG(ERROR) << "Invalid width parameter passed";
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return -1;
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}
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}
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if (cl->HasSwitch(kHeightFlag)) {
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if (!base::StringToUint(cl->GetSwitchValueASCII(kHeightFlag), &height)) {
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LOG(ERROR) << "Invalid height parameter passed";
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return -1;
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}
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}
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win = XCreateSimpleWindow(dpy, RootWindow(dpy, screen), x, y, width, height,
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0, 0 /* black */, bgcolor);
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XClassHint* wmclass_hint = XAllocClassHint();
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wmclass_hint->res_name = wmclass_hint->res_class = strdup(title.c_str());
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XSetClassHint(dpy, win, wmclass_hint);
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XSelectInput(dpy, win, KeyPressMask);
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XMapWindow(dpy, win);
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XStoreName(dpy, win, title.c_str());
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LOG(INFO) << "x11_demo application displaying, waiting for keypress";
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XEvent evt;
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for (;;) {
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XNextEvent(dpy, &evt);
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if (evt.type == KeyPress) {
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LOG(INFO) << "x11_demo application detected keypress";
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break;
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}
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}
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XCloseDisplay(dpy);
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LOG(INFO) << "x11_demo application exiting";
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return 0;
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}
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