Cool_Tools/ImHex
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ImHex/source/window.cpp

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#include "window.hpp"
#include <hex.hpp>
#include <hex/api/content_registry.hpp>
#include <iostream>
#include <numeric>
#include <imgui.h>
#include <imgui_internal.h>
#include <imgui_impl_glfw.h>
#include <imgui_impl_opengl3.h>
#include <imgui_freetype.h>
#include <imgui_imhex_extensions.h>
#include "helpers/plugin_handler.hpp"
#include <glad/glad.h>
#include <GLFW/glfw3.h>
#if defined(OS_WINDOWS)
#include <windows.h>
#endif
namespace hex {
constexpr auto MenuBarItems = { "File", "Edit", "View", "Help" };
void *ImHexSettingsHandler_ReadOpenFn(ImGuiContext *ctx, ImGuiSettingsHandler *, const char *) {
return ctx; // Unused, but the return value has to be non-null
}
void ImHexSettingsHandler_ReadLine(ImGuiContext*, ImGuiSettingsHandler *handler, void *, const char* line) {
for (auto &view : ContentRegistry::Views::getEntries()) {
std::string format = std::string(view->getName()) + "=%d";
sscanf(line, format.c_str(), &view->getWindowOpenState());
}
}
void ImHexSettingsHandler_WriteAll(ImGuiContext* ctx, ImGuiSettingsHandler *handler, ImGuiTextBuffer *buf) {
buf->reserve(buf->size() + 0x20); // Ballpark reserve
buf->appendf("[%s][General]\n", handler->TypeName);
for (auto &view : ContentRegistry::Views::getEntries()) {
buf->appendf("%s=%d\n", view->getName().data(), view->getWindowOpenState());
}
buf->append("\n");
}
Window::Window(int &argc, char **&argv) {
hex::SharedData::mainArgc = argc;
hex::SharedData::mainArgv = argv;
// Try to attach to a currently open console on Windows if available
#if defined(OS_WINDOWS)
if (AttachConsole(ATTACH_PARENT_PROCESS)) {
HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
if (hStdOut != INVALID_HANDLE_VALUE) {
freopen("CONOUT$", "w", stdout);
freopen("CONERR$", "w", stderr);
setvbuf(stdout, nullptr, _IONBF, 0);
setvbuf(stderr, nullptr, _IONBF, 0);
}
}
#endif
this->initGLFW();
this->initImGui();
ContentRegistry::Settings::add("Interface", "Color theme", 0, [](nlohmann::json &setting) {
static int selection = setting;
if (ImGui::Combo("##nolabel", &selection, "Dark\0Light\0Classic\0")) {
setting = selection;
return true;
}
return false;
});
ImGui::GetStyle().Colors[ImGuiCol_DockingEmptyBg] = ImGui::GetStyle().Colors[ImGuiCol_WindowBg];
EventManager::subscribe(Events::SettingsChanged, this, [](auto) -> std::any {
int theme = ContentRegistry::Settings::getSettingsData()["Interface"]["Color theme"];
switch (theme) {
default:
case 0: /* Dark theme */
ImGui::StyleColorsDark();
break;
case 1: /* Light theme */
ImGui::StyleColorsLight();
break;
case 2: /* Classic theme */
ImGui::StyleColorsClassic();
break;
}
ImGui::GetStyle().Colors[ImGuiCol_DockingEmptyBg] = ImGui::GetStyle().Colors[ImGuiCol_WindowBg];
return { };
});
ContentRegistry::Settings::load();
View::postEvent(Events::SettingsChanged);
}
Window::~Window() {
this->deinitImGui();
this->deinitGLFW();
ContentRegistry::Settings::store();
for (auto &view : ContentRegistry::Views::getEntries())
delete view;
ContentRegistry::Views::getEntries().clear();
this->deinitPlugins();
EventManager::unsubscribe(Events::SettingsChanged, this);
}
void Window::loop() {
while (!glfwWindowShouldClose(this->m_window)) {
this->frameBegin();
for (const auto &call : View::getDeferedCalls())
call();
View::getDeferedCalls().clear();
for (auto &view : ContentRegistry::Views::getEntries()) {
if (!view->isAvailable() || !view->getWindowOpenState())
continue;
auto minSize = view->getMinSize();
minSize.x *= this->m_globalScale;
minSize.y *= this->m_globalScale;
ImGui::SetNextWindowSizeConstraints(minSize, view->getMaxSize());
view->drawContent();
}
View::drawCommonInterfaces();
#ifdef DEBUG
if (this->m_demoWindowOpen)
ImGui::ShowDemoWindow(&this->m_demoWindowOpen);
#endif
this->frameEnd();
}
}
bool Window::setFont(const std::filesystem::path &path) {
if (!std::filesystem::exists(path))
return false;
auto &io = ImGui::GetIO();
// If we have a custom font, then rescaling is unnecessary and will make it blurry
io.FontGlobalScale = 1.0f;
// Load font data & build atlas
std::uint8_t *px;
int w, h;
io.Fonts->AddFontFromFileTTF(path.string().c_str(), std::floor(14.0f * this->m_fontScale)); // Needs conversion to char for Windows
ImGuiFreeType::BuildFontAtlas(io.Fonts, ImGuiFreeType::Monochrome);
io.Fonts->GetTexDataAsRGBA32(&px, &w, &h);
// Create new font atlas
GLuint tex;
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, w, h, 0, GL_RGBA8, GL_UNSIGNED_INT, px);
io.Fonts->SetTexID(reinterpret_cast<ImTextureID>(tex));
return true;
}
void Window::frameBegin() {
glfwPollEvents();
ImGui_ImplOpenGL3_NewFrame();
ImGui_ImplGlfw_NewFrame();
ImGui::NewFrame();
ImGuiViewport* viewport = ImGui::GetMainViewport();
ImGui::SetNextWindowPos(viewport->GetWorkPos());
ImGui::SetNextWindowSize(viewport->GetWorkSize());
ImGui::SetNextWindowViewport(viewport->ID);
ImGui::PushStyleVar(ImGuiStyleVar_WindowRounding, 0.0f);
ImGui::PushStyleVar(ImGuiStyleVar_WindowBorderSize, 0.0f);
ImGuiWindowFlags windowFlags = ImGuiWindowFlags_MenuBar | ImGuiWindowFlags_NoDocking
| ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoCollapse
| ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoResize
| ImGuiWindowFlags_NoNavFocus | ImGuiWindowFlags_NoBringToFrontOnFocus;
ImGui::GetIO().ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;
if (ImGui::Begin("DockSpace", nullptr, windowFlags)) {
ImGui::PopStyleVar(2);
ImGui::DockSpace(ImGui::GetID("MainDock"), ImVec2(0.0f, 0.0f));
if (ImGui::BeginMenuBar()) {
for (auto menu : MenuBarItems)
if (ImGui::BeginMenu(menu)) ImGui::EndMenu();
if (ImGui::BeginMenu("View")) {
for (auto &view : ContentRegistry::Views::getEntries()) {
if (view->hasViewMenuItemEntry())
ImGui::MenuItem((std::string(view->getName()) + " View").c_str(), "", &view->getWindowOpenState());
}
ImGui::EndMenu();
}
for (auto &view : ContentRegistry::Views::getEntries()) {
view->drawMenu();
}
if (ImGui::BeginMenu("View")) {
ImGui::Separator();
ImGui::MenuItem("Display FPS", "", &this->m_fpsVisible);
#ifdef DEBUG
ImGui::MenuItem("Demo View", "", &this->m_demoWindowOpen);
#endif
ImGui::EndMenu();
}
if (this->m_fpsVisible) {
char buffer[0x20];
snprintf(buffer, 0x20, "%.1f FPS", ImGui::GetIO().Framerate);
ImGui::SameLine(ImGui::GetWindowWidth() - ImGui::GetFontSize() * strlen(buffer) + 20);
ImGui::TextUnformatted(buffer);
}
ImGui::EndMenuBar();
}
if (auto &[key, mods] = Window::s_currShortcut; key != -1) {
for (auto &view : ContentRegistry::Views::getEntries()) {
if (view->getWindowOpenState()) {
if (view->handleShortcut(key, mods))
break;
}
}
Window::s_currShortcut = { -1, -1 };
}
bool anyViewOpen = false;
for (auto &view : ContentRegistry::Views::getEntries())
anyViewOpen = anyViewOpen || (view->getWindowOpenState() && view->isAvailable());
if (!anyViewOpen) {
char title[256];
ImFormatString(title, IM_ARRAYSIZE(title), "%s/DockSpace_%08X", ImGui::GetCurrentWindow()->Name, ImGui::GetID("MainDock"));
if (ImGui::Begin(title)) {
ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(10 * this->m_globalScale, 10 * this->m_globalScale));
if (ImGui::BeginChild("Welcome Screen", ImVec2(0, 0), false, ImGuiWindowFlags_AlwaysUseWindowPadding | ImGuiWindowFlags_NoDecoration)) {
this->drawWelcomeScreen();
}
ImGui::EndChild();
ImGui::PopStyleVar();
}
ImGui::End();
}
}
ImGui::End();
}
void Window::frameEnd() {
ImGui::Render();
int displayWidth, displayHeight;
glfwGetFramebufferSize(this->m_window, &displayWidth, &displayHeight);
glViewport(0, 0, displayWidth, displayHeight);
glClearColor(0.45f, 0.55f, 0.60f, 1.00f);
glClear(GL_COLOR_BUFFER_BIT);
ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
GLFWwindow* backup_current_context = glfwGetCurrentContext();
ImGui::UpdatePlatformWindows();
ImGui::RenderPlatformWindowsDefault();
glfwMakeContextCurrent(backup_current_context);
glfwSwapBuffers(this->m_window);
}
void Window::drawWelcomeScreen() {
ImGui::UnderlinedText("Welcome to ImHex!", ImGui::GetStyleColorVec4(ImGuiCol_HeaderActive));
ImGui::NewLine();
auto availableSpace = ImGui::GetContentRegionAvail();
ImGui::Indent();
if (ImGui::BeginTable("Welcome Left", 1, ImGuiTableFlags_NoBordersInBody, ImVec2(availableSpace.x / 2, availableSpace.y))) {
ImGui::TableNextRow(ImGuiTableRowFlags_None, 100);
ImGui::TableNextColumn();
ImGui::Text("Start");
{
if (ImGui::BulletHyperlink("Open File"))
EventManager::post(Events::OpenWindow, "Open File");
if (ImGui::BulletHyperlink("Open Project"))
EventManager::post(Events::OpenWindow, "Open Project");
}
ImGui::TableNextRow(ImGuiTableRowFlags_None, 100);
ImGui::TableNextColumn();
ImGui::Text("Recent");
{
}
ImGui::TableNextRow(ImGuiTableRowFlags_None, 100);
ImGui::TableNextColumn();
ImGui::Text("Help");
{
if (ImGui::BulletHyperlink("GitHub Repository")) hex::openWebpage("https://github.com/WerWolv/ImHex");
if (ImGui::BulletHyperlink("Get help")) hex::openWebpage("https://github.com/WerWolv/ImHex/discussions/categories/get-help");
}
ImGui::EndTable();
}
ImGui::SameLine();
if (ImGui::BeginTable("Welcome Right", 1, ImGuiTableFlags_NoBordersInBody, ImVec2(availableSpace.x / 2, availableSpace.y))) {
ImGui::TableNextRow(ImGuiTableRowFlags_None, 100);
ImGui::TableNextColumn();
ImGui::Text("Customize");
{
if (ImGui::DescriptionButton("Settings", "Change preferences of ImHex", ImVec2(ImGui::GetContentRegionAvail().x * 0.8f, 0)))
EventManager::post(Events::OpenWindow, "Preferences");
}
ImGui::TableNextRow(ImGuiTableRowFlags_None, 100);
ImGui::TableNextColumn();
ImGui::Text("Learn");
{
if (ImGui::DescriptionButton("Latest Release", "Get the latest version of ImHex or read the current changelog", ImVec2(ImGui::GetContentRegionAvail().x * 0.8, 0)))
hex::openWebpage("https://github.com/WerWolv/ImHex/releases/latest");
if (ImGui::DescriptionButton("Pattern Language Documentation", "Learn how to write ImHex patterns with our extensive documentation", ImVec2(ImGui::GetContentRegionAvail().x * 0.8, 0)))
hex::openWebpage("https://github.com/WerWolv/ImHex/wiki/Pattern-Language-Guide");
if (ImGui::DescriptionButton("Plugins API", "Extend ImHex with additional features using plugins", ImVec2(ImGui::GetContentRegionAvail().x * 0.8, 0)))
hex::openWebpage("https://github.com/WerWolv/ImHex/wiki/Plugins-Development-Guide");
}
ImGui::EndTable();
}
}
void Window::initGLFW() {
glfwSetErrorCallback([](int error, const char* desc) {
fprintf(stderr, "Glfw Error %d: %s\n", error, desc);
});
if (!glfwInit())
throw std::runtime_error("Failed to initialize GLFW!");
#ifdef __APPLE__
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
#endif
if (auto *monitor = glfwGetPrimaryMonitor(); monitor) {
float xscale, yscale;
glfwGetMonitorContentScale(monitor, &xscale, &yscale);
// In case the horizontal and vertical scale are different, fall back on the average
this->m_globalScale = this->m_fontScale = std::midpoint(xscale, yscale);
}
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
this->m_window = glfwCreateWindow(1280 * this->m_globalScale, 720 * this->m_globalScale, "ImHex", nullptr, nullptr);
if (this->m_window == nullptr)
throw std::runtime_error("Failed to create window!");
glfwMakeContextCurrent(this->m_window);
glfwSwapInterval(1);
{
int x = 0, y = 0;
glfwGetWindowPos(this->m_window, &x, &y);
SharedData::windowPos = ImVec2(x, y);
}
{
int width = 0, height = 0;
glfwGetWindowSize(this->m_window, &width, &height);
SharedData::windowSize = ImVec2(width, height);
}
glfwSetWindowPosCallback(this->m_window, [](GLFWwindow *window, int x, int y) {
SharedData::windowPos = ImVec2(x, y);
});
glfwSetWindowSizeCallback(this->m_window, [](GLFWwindow *window, int width, int height) {
SharedData::windowSize = ImVec2(width, height);
});
glfwSetKeyCallback(this->m_window, [](GLFWwindow *window, int key, int scancode, int action, int mods) {
if (action == GLFW_PRESS) {
Window::s_currShortcut = { key, mods };
auto &io = ImGui::GetIO();
io.KeysDown[key] = true;
io.KeyCtrl = (mods & GLFW_MOD_CONTROL) != 0;
io.KeyShift = (mods & GLFW_MOD_SHIFT) != 0;
io.KeyAlt = (mods & GLFW_MOD_ALT) != 0;
}
else if (action == GLFW_RELEASE) {
auto &io = ImGui::GetIO();
io.KeysDown[key] = false;
io.KeyCtrl = (mods & GLFW_MOD_CONTROL) != 0;
io.KeyShift = (mods & GLFW_MOD_SHIFT) != 0;
io.KeyAlt = (mods & GLFW_MOD_ALT) != 0;
}
});
glfwSetDropCallback(this->m_window, [](GLFWwindow *window, int count, const char **paths) {
if (count != 1)
return;
View::postEvent(Events::FileDropped, paths[0]);
});
glfwSetWindowCloseCallback(this->m_window, [](GLFWwindow *window) {
View::postEvent(Events::WindowClosing, window);
});
glfwSetWindowSizeLimits(this->m_window, 720, 480, GLFW_DONT_CARE, GLFW_DONT_CARE);
if (gladLoadGL() == 0)
throw std::runtime_error("Failed to initialize OpenGL loader!");
}
void Window::initImGui() {
IMGUI_CHECKVERSION();
auto *ctx = ImGui::CreateContext();
GImGui = ctx;
ImGuiIO& io = ImGui::GetIO();
ImGuiStyle& style = ImGui::GetStyle();
io.ConfigFlags |= ImGuiConfigFlags_DockingEnable | ImGuiConfigFlags_ViewportsEnable | ImGuiConfigFlags_NavEnableKeyboard;
io.ConfigViewportsNoTaskBarIcon = true;
io.KeyMap[ImGuiKey_Tab] = GLFW_KEY_TAB;
io.KeyMap[ImGuiKey_LeftArrow] = GLFW_KEY_LEFT;
io.KeyMap[ImGuiKey_RightArrow] = GLFW_KEY_RIGHT;
io.KeyMap[ImGuiKey_UpArrow] = GLFW_KEY_UP;
io.KeyMap[ImGuiKey_DownArrow] = GLFW_KEY_DOWN;
io.KeyMap[ImGuiKey_PageUp] = GLFW_KEY_PAGE_UP;
io.KeyMap[ImGuiKey_PageDown] = GLFW_KEY_PAGE_DOWN;
io.KeyMap[ImGuiKey_Home] = GLFW_KEY_HOME;
io.KeyMap[ImGuiKey_End] = GLFW_KEY_END;
io.KeyMap[ImGuiKey_Insert] = GLFW_KEY_INSERT;
io.KeyMap[ImGuiKey_Delete] = GLFW_KEY_DELETE;
io.KeyMap[ImGuiKey_Backspace] = GLFW_KEY_BACKSPACE;
io.KeyMap[ImGuiKey_Space] = GLFW_KEY_SPACE;
io.KeyMap[ImGuiKey_Enter] = GLFW_KEY_ENTER;
io.KeyMap[ImGuiKey_Escape] = GLFW_KEY_ESCAPE;
io.KeyMap[ImGuiKey_KeyPadEnter] = GLFW_KEY_KP_ENTER;
io.KeyMap[ImGuiKey_A] = GLFW_KEY_A;
io.KeyMap[ImGuiKey_C] = GLFW_KEY_C;
io.KeyMap[ImGuiKey_V] = GLFW_KEY_V;
io.KeyMap[ImGuiKey_X] = GLFW_KEY_X;
io.KeyMap[ImGuiKey_Y] = GLFW_KEY_Y;
io.KeyMap[ImGuiKey_Z] = GLFW_KEY_Z;
if (this->m_globalScale != 0.0f)
style.ScaleAllSizes(this->m_globalScale);
#if defined(OS_WINDOWS)
std::filesystem::path resourcePath = std::filesystem::path((SharedData::mainArgv)[0]).parent_path();
#elif defined(OS_LINUX) || defined(OS_MACOS)
std::filesystem::path resourcePath = "/usr/share/ImHex";
#else
std::filesystem::path resourcePath = "";
#warning "Unsupported OS for custom font support"
#endif
if (!resourcePath.empty() && this->setFont(resourcePath / "font.ttf")) {
}
else if ((this->m_fontScale != 0.0f) && (this->m_fontScale != 1.0f)) {
io.Fonts->Clear();
ImFontConfig cfg;
cfg.OversampleH = cfg.OversampleV = 1, cfg.PixelSnapH = true;
cfg.SizePixels = 13.0f * this->m_fontScale;
io.Fonts->AddFontDefault(&cfg);
}
style.WindowMenuButtonPosition = ImGuiDir_None;
style.IndentSpacing = 10.0F;
// Install custom settings handler
ImGuiSettingsHandler handler;
handler.TypeName = "ImHex";
handler.TypeHash = ImHashStr("ImHex");
handler.ReadOpenFn = ImHexSettingsHandler_ReadOpenFn;
handler.ReadLineFn = ImHexSettingsHandler_ReadLine;
handler.WriteAllFn = ImHexSettingsHandler_WriteAll;
handler.UserData = this;
ctx->SettingsHandlers.push_back(handler);
ImGui::StyleColorsDark();
ImGui_ImplGlfw_InitForOpenGL(this->m_window, true);
ImGui_ImplOpenGL3_Init("#version 150");
}
void Window::initPlugins() {
try {
auto pluginFolderPath = std::filesystem::path((SharedData::mainArgv)[0]).parent_path() / "plugins";
PluginHandler::load(pluginFolderPath.string());
} catch (std::runtime_error &e) { return; }
for (const auto &plugin : PluginHandler::getPlugins()) {
plugin.initializePlugin();
}
}
void Window::deinitGLFW() {
glfwDestroyWindow(this->m_window);
glfwTerminate();
}
void Window::deinitImGui() {
ImGui_ImplOpenGL3_Shutdown();
ImGui_ImplGlfw_Shutdown();
ImGui::DestroyContext();
}
void Window::deinitPlugins() {
PluginHandler::unload();
}
}
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