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Added Plugin support (#102)

Browse Source 
* Build refactoring and initial plugin support

* Possibly fixed linux / mac build

* Added libdl to libglad build script

* Add glfw to imgui dependencies

* Refactored common functionality into "libimhex" for plugins

* Added plugin loading and example plugin

* Added proper API for creating a custom view and a custom tools entry with plugins
This commit is contained in:
WerWolv
2020-12-22 18:10:01 +01:00
committed by GitHub
parent b9324f44e6
commit dbbc525174
83 changed files with 791 additions and 422 deletions
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70
source/helpers/plugin_handler.cpp Normal file
View File

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#include "helpers/plugin_handler.hpp"
#include <dlfcn.h>
#include <filesystem>
namespace hex {
// hex::plugin::createView(void)
constexpr auto CreateViewSymbol = "_ZN3hex6plugin10createViewEv";
// hex::plugin::drawToolsEntry(void)
constexpr auto DrawToolsEntrySymbol = "_ZN3hex6plugin14drawToolsEntryEv";
// hex::plugin::internal::setImGuiContext(ImGuiContext*)
constexpr auto SetImGuiContextSymbol = "_ZN3hex6plugin8internal15setImGuiContextEP12ImGuiContext";
Plugin::Plugin(std::string_view path) {
this->m_handle = dlopen(path.data(), RTLD_LAZY);
if (this->m_handle == nullptr)
return;
this->m_createViewFunction = reinterpret_cast<CreateViewFunc>(dlsym(this->m_handle, CreateViewSymbol));
this->m_drawToolsEntryFunction = reinterpret_cast<DrawToolsEntryFunc>(dlsym(this->m_handle, DrawToolsEntrySymbol));
this->m_setImGuiContextFunction = reinterpret_cast<SetImGuiContextFunc>(dlsym(this->m_handle, SetImGuiContextSymbol));
}
Plugin::~Plugin() {
if (this->m_handle != nullptr)
dlclose(this->m_handle);
}
void Plugin::setImGuiContext(ImGuiContext *ctx) const {
if (this->m_setImGuiContextFunction != nullptr)
this->m_setImGuiContextFunction(ctx);
}
View* Plugin::createView() const {
if (this->m_createViewFunction != nullptr)
return this->m_createViewFunction();
return nullptr;
}
void Plugin::drawToolsEntry() const {
if (this->m_drawToolsEntryFunction != nullptr)
this->m_drawToolsEntryFunction();
}
void PluginHandler::load(std::string_view pluginFolder) {
PluginHandler::unload();
if (!std::filesystem::exists(pluginFolder))
throw std::runtime_error("Failed to find plugin folder");
PluginHandler::s_pluginFolder = pluginFolder;
for (auto& pluginPath : std::filesystem::directory_iterator(pluginFolder))
PluginHandler::s_plugins.emplace_back(pluginPath.path().string());
}
void PluginHandler::unload() {
PluginHandler::s_plugins.clear();
PluginHandler::s_pluginFolder.clear();
}
void PluginHandler::reload() {
PluginHandler::load(PluginHandler::s_pluginFolder);
}
}