From 476a3acfb21f58c69476e32d34eb1002dbc4ae28 Mon Sep 17 00:00:00 2001
From: Nico Weber <thakis@chromium.org>
Date: Fri, 15 Jan 2021 14:12:34 -0500
Subject: [PATCH] Utilities: Add "chres", a way to change the screen resolution
 from the command line

---
 Userland/Utilities/CMakeLists.txt |  1 +
 Userland/Utilities/chres.cpp      | 50 +++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 Userland/Utilities/chres.cpp

diff --git a/Userland/Utilities/CMakeLists.txt b/Userland/Utilities/CMakeLists.txt
index a6cffdb6de..242754ac5d 100644
--- a/Userland/Utilities/CMakeLists.txt
+++ b/Userland/Utilities/CMakeLists.txt
@@ -18,6 +18,7 @@ endforeach()
 target_link_libraries(aplay LibAudio)
 target_link_libraries(avol LibAudio)
 target_link_libraries(checksum LibCrypto)
+target_link_libraries(chres LibGUI)
 target_link_libraries(copy LibGUI)
 target_link_libraries(disasm LibX86)
 target_link_libraries(expr LibRegex)
diff --git a/Userland/Utilities/chres.cpp b/Userland/Utilities/chres.cpp
new file mode 100644
index 0000000000..a972e22c39
--- /dev/null
+++ b/Userland/Utilities/chres.cpp
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2021, Nico Weber <thakis@chromium.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <LibCore/ArgsParser.h>
+#include <LibGUI/Application.h>
+#include <LibGUI/WindowServerConnection.h>
+
+int main(int argc, char** argv)
+{
+    int width = -1;
+    int height = -1;
+
+    Core::ArgsParser args_parser;
+    args_parser.set_general_help("Change the screen resolution.");
+    args_parser.add_positional_argument(width, "Width", "width");
+    args_parser.add_positional_argument(height, "Height", "height");
+    args_parser.parse(argc, argv);
+
+    // A Core::EventLoop is all we need, but WindowServerConnection needs a full Application object.
+    char* dummy_argv[] = { argv[0] };
+    auto app = GUI::Application::construct(1, dummy_argv);
+    auto result = GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::SetResolution>(Gfx::IntSize { width, height });
+    if (!result->success()) {
+        warnln("failed to set resolution");
+        return 1;
+    }
+}