176 lines
4.2 KiB
C++
176 lines
4.2 KiB
C++
#include "OpenGLX_Hook.h"
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#include "X11_Hook.h"
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#include "../Renderer_Detector.h"
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#include "../dll/dll.h"
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#ifdef __LINUX__
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#ifndef NO_OVERLAY
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#include <imgui.h>
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#include <impls/imgui_impl_opengl3.h>
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#include "../steam_overlay.h"
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OpenGLX_Hook* OpenGLX_Hook::_inst = nullptr;
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bool OpenGLX_Hook::start_hook()
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{
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bool res = true;
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if (!hooked)
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{
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if (!X11_Hook::Inst()->start_hook())
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return false;
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GLenum err = glewInit();
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if (err == GLEW_OK)
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{
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PRINT_DEBUG("Hooked OpenGLX\n");
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hooked = true;
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Renderer_Detector::Inst().renderer_found(this);
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/*
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UnhookAll();
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BeginHook();
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HookFuncs(
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std::make_pair<void**, void*>(&(void*&)_glXSwapBuffers, (void*)&OpenGLX_Hook::MyglXSwapBuffers)
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);
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EndHook();
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*/
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get_steam_client()->steam_overlay->HookReady();
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}
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else
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{
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PRINT_DEBUG("Failed to hook OpenGLX\n");
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/* Problem: glewInit failed, something is seriously wrong. */
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PRINT_DEBUG("Error: %s\n", glewGetErrorString(err));
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res = false;
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}
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}
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return true;
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}
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void OpenGLX_Hook::resetRenderState()
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{
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if (initialized)
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{
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ImGui_ImplOpenGL3_Shutdown();
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X11_Hook::Inst()->resetRenderState();
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ImGui::DestroyContext();
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glXDestroyContext(display, context);
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display = nullptr;
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initialized = false;
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}
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}
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// Try to make this function and overlay's proc as short as possible or it might affect game's fps.
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void OpenGLX_Hook::prepareForOverlay(Display* display, GLXDrawable drawable)
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{
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PRINT_DEBUG("Called SwapBuffer hook");
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if( (Window)drawable != X11_Hook::Inst()->get_game_wnd() )
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X11_Hook::Inst()->resetRenderState();
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if( ! initialized )
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{
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ImGui::CreateContext();
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ImGuiIO& io = ImGui::GetIO();
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io.IniFilename = NULL;
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ImGui_ImplOpenGL3_Init();
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int attributes[] = { //can't be const b/c X11 doesn't like it. Not sure if that's intentional or just stupid.
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GLX_RGBA, //apparently nothing comes after this?
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GLX_RED_SIZE, 8,
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GLX_GREEN_SIZE, 8,
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GLX_BLUE_SIZE, 8,
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GLX_ALPHA_SIZE, 8,
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//Ideally, the size would be 32 (or at least 24), but I have actually seen
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// this size (on a modern OS even).
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GLX_DEPTH_SIZE, 16,
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GLX_DOUBLEBUFFER, True,
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None
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};
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XVisualInfo* visual_info = glXChooseVisual(display, DefaultScreen(display), attributes);
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context = glXCreateContext(display, visual_info, nullptr, True);
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this->display = display;
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get_steam_client()->steam_overlay->CreateFonts();
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initialized = true;
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}
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auto oldContext = glXGetCurrentContext();
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glXMakeCurrent(display, drawable, context);
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ImGui_ImplOpenGL3_NewFrame();
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X11_Hook::Inst()->prepareForOverlay(display, (Window)drawable);
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ImGui::NewFrame();
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get_steam_client()->steam_overlay->OverlayProc();
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ImGui::Render();
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ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
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glXMakeCurrent(display, drawable, oldContext);
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}
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void OpenGLX_Hook::MyglXSwapBuffers(Display* display, GLXDrawable drawable)
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{
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OpenGLX_Hook::Inst()->prepareForOverlay(display, drawable);
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OpenGLX_Hook::Inst()->_glXSwapBuffers(display, drawable);
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}
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OpenGLX_Hook::OpenGLX_Hook():
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initialized(false),
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hooked(false),
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_glXSwapBuffers(nullptr)
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{
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//_library = dlopen(DLL_NAME);
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}
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OpenGLX_Hook::~OpenGLX_Hook()
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{
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PRINT_DEBUG("OpenGLX Hook removed\n");
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if (initialized)
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{
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ImGui_ImplOpenGL3_Shutdown();
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ImGui::DestroyContext();
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glXDestroyContext(display, context);
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}
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//dlclose(_library);
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_inst = nullptr;
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}
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OpenGLX_Hook* OpenGLX_Hook::Inst()
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{
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if (_inst == nullptr)
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_inst = new OpenGLX_Hook;
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return _inst;
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}
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const char* OpenGLX_Hook::get_lib_name() const
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{
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return DLL_NAME;
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}
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void OpenGLX_Hook::loadFunctions(decltype(glXSwapBuffers)* pfnglXSwapBuffers)
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{
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_glXSwapBuffers = pfnglXSwapBuffers;
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}
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#endif//NO_OVERLAY
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#endif//__LINUX__
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