151 lines
3.2 KiB
C++
151 lines
3.2 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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#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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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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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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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)
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{
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PRINT_DEBUG("Called SwapBuffer hook");
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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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initialized = true;
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}
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if( initialized )
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{
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ImGuiIO& io = ImGui::GetIO();
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GLint m_viewport[4];
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glGetIntegerv( GL_VIEWPORT, m_viewport );
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int width = m_viewport[2];
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int height = m_viewport[3];
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ImGui_ImplOpenGL3_NewFrame();
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X11_Hook::Inst()->prepareForOverlay(display);
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ImGui::NewFrame();
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get_steam_client()->steam_overlay->OverlayProc(width, height);
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ImGui::EndFrame();
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ImGui::Render();
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ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
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}
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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);
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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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}
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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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