ftpiiu_plugin/source/linux/platform.cpp
2023-03-11 07:02:43 -06:00

309 lines
7.0 KiB
C++

// ftpd is a server implementation based on the following:
// - RFC 959 (https://tools.ietf.org/html/rfc959)
// - RFC 3659 (https://tools.ietf.org/html/rfc3659)
// - suggested implementation details from https://cr.yp.to/ftp/filesystem.html
//
// Copyright (C) 2023 Michael Theall
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
#include "platform.h"
#include "ftpServer.h"
#include "imgui.h"
#include <glad/glad.h>
#include <GLFW/glfw3.h>
#include "imgui_impl_glfw.h"
#include "imgui_impl_opengl3.h"
#include <cstdio>
#include <memory>
#include <mutex>
#include <thread>
namespace
{
/// \brief GLFW main window
std::unique_ptr<GLFWwindow, void (*) (GLFWwindow *)> s_mainWindow (nullptr, glfwDestroyWindow);
/// \brief Window resize callback
/// \param window_ GLFW window
/// \param width_ New window width
/// \param height_ New window height
void windowResize (GLFWwindow *const window_, int const width_, int const height_)
{
(void)window_;
if (!width_ || !height_)
return;
glViewport (0, 0, width_, height_);
}
#ifndef NDEBUG
/// \brief GL log callback
/// \param source_ Message source
/// \param type_ Message type
/// \param id_ Message id
/// \param severity_ Message severity
/// \param length_ Message length
/// \param userParam_ User parameter
void logCallback (GLenum const source_,
GLenum const type_,
GLuint const id_,
GLenum const severity_,
GLsizei const length_,
GLchar const *const message_,
void const *const userParam_)
{
if (id_ == 131185)
return;
(void)source_;
(void)type_;
(void)severity_;
(void)length_;
(void)userParam_;
std::fprintf (stderr, "%s\n", message_);
}
#endif
}
bool platform::init ()
{
// initialize GLFW
if (!glfwInit ())
{
std::fprintf (stderr, "Failed to initialize GLFW\n");
return false;
}
// use OpenGL 4.3 Core Profile
glfwWindowHint (GLFW_CONTEXT_VERSION_MAJOR, 4);
glfwWindowHint (GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint (GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
#ifndef NDEBUG
glfwWindowHint (GLFW_OPENGL_DEBUG_CONTEXT, GL_TRUE);
#endif
// set depth buffer size
glfwWindowHint (GLFW_DEPTH_BITS, 24);
glfwWindowHint (GLFW_STENCIL_BITS, 8);
// create GLFW window
s_mainWindow.reset (glfwCreateWindow (1280, 720, "Test Game", nullptr, nullptr));
if (!s_mainWindow)
{
std::fprintf (stderr, "Failed to create window\n");
glfwTerminate ();
return false;
}
// enable vsync
glfwSwapInterval (1);
// create context
glfwMakeContextCurrent (s_mainWindow.get ());
glfwSetFramebufferSizeCallback (s_mainWindow.get (), windowResize);
// load OpenGL
if (!gladLoadGL ())
{
std::fprintf (stderr, "gladLoadGL: failed\n");
platform::exit ();
return false;
}
#ifndef NDEBUG
GLint flags;
glGetIntegerv (GL_CONTEXT_FLAGS, &flags);
if (flags & GL_CONTEXT_FLAG_DEBUG_BIT)
{
glEnable (GL_DEBUG_OUTPUT);
glEnable (GL_DEBUG_OUTPUT_SYNCHRONOUS);
glDebugMessageCallback (logCallback, nullptr);
glDebugMessageControl (GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, nullptr, GL_TRUE);
}
#endif
glEnable (GL_CULL_FACE);
glFrontFace (GL_CCW);
glCullFace (GL_BACK);
glEnable (GL_DEPTH_TEST);
glDepthFunc (GL_LEQUAL);
glClearColor (104.0f / 255.0f, 176.0f / 255.0f, 216.0f / 255.0f, 1.0f);
glEnable (GL_BLEND);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
std::printf ("Renderer: %s\n", glGetString (GL_RENDERER));
std::printf ("OpenGL Version: %s\n", glGetString (GL_VERSION));
ImGui_ImplGlfw_InitForOpenGL (s_mainWindow.get (), true);
ImGui_ImplOpenGL3_Init ("#version 150");
auto &io = ImGui::GetIO ();
// disable imgui.ini file
io.IniFilename = nullptr;
return true;
}
bool platform::networkVisible ()
{
return true;
}
bool platform::networkAddress (SockAddr &addr_)
{
struct sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
addr_ = addr;
return true;
}
bool platform::loop ()
{
bool inactive;
do
{
inactive = glfwGetWindowAttrib (s_mainWindow.get (), GLFW_ICONIFIED);
(inactive ? glfwWaitEvents : glfwPollEvents) ();
if (glfwWindowShouldClose (s_mainWindow.get ()))
return false;
} while (inactive);
ImGui_ImplOpenGL3_NewFrame ();
ImGui_ImplGlfw_NewFrame ();
ImGui::NewFrame ();
return true;
}
void platform::render ()
{
auto const freeSpace = FtpServer::getFreeSpace ();
if (!freeSpace.empty ())
{
auto const &io = ImGui::GetIO ();
auto const &style = ImGui::GetStyle ();
auto const size = ImGui::CalcTextSize (freeSpace.c_str ());
auto const x = io.DisplaySize.x - size.x - style.FramePadding.x;
ImGui::GetForegroundDrawList ()->AddText (ImVec2 (x, style.FramePadding.y),
ImGui::GetColorU32 (ImGuiCol_Text),
freeSpace.c_str ());
}
ImGui::Render ();
glClearColor (0.45f, 0.55f, 0.60f, 1.00f);
glClear (GL_COLOR_BUFFER_BIT);
ImGui_ImplOpenGL3_RenderDrawData (ImGui::GetDrawData ());
glfwSwapBuffers (s_mainWindow.get ());
}
void platform::exit ()
{
s_mainWindow.reset ();
glfwTerminate ();
}
///////////////////////////////////////////////////////////////////////////
/// \brief Platform thread pimpl
class platform::Thread::privateData_t
{
public:
privateData_t () = default;
/// \brief Parameterized constructor
/// \param func_ Thread entry point
privateData_t (std::function<void ()> &&func_) : thread (std::move (func_))
{
}
/// \brief Underlying thread object
std::thread thread;
};
///////////////////////////////////////////////////////////////////////////
platform::Thread::~Thread () = default;
platform::Thread::Thread () : m_d (new privateData_t ())
{
}
platform::Thread::Thread (std::function<void ()> &&func_)
: m_d (new privateData_t (std::move (func_)))
{
}
platform::Thread::Thread (Thread &&that_) : m_d (new privateData_t ())
{
std::swap (m_d, that_.m_d);
}
platform::Thread &platform::Thread::operator= (Thread &&that_)
{
std::swap (m_d, that_.m_d);
return *this;
}
void platform::Thread::join ()
{
m_d->thread.join ();
}
void platform::Thread::sleep (std::chrono::milliseconds const timeout_)
{
std::this_thread::sleep_for (timeout_);
}
///////////////////////////////////////////////////////////////////////////
/// \brief Platform mutex pimpl
class platform::Mutex::privateData_t
{
public:
/// \brief Underlying mutex
std::mutex mutex;
};
///////////////////////////////////////////////////////////////////////////
platform::Mutex::~Mutex () = default;
platform::Mutex::Mutex () : m_d (new privateData_t ())
{
}
void platform::Mutex::lock ()
{
m_d->mutex.lock ();
}
void platform::Mutex::unlock ()
{
m_d->mutex.unlock ();
}