mirror of
https://gitlab.com/Mr_Goldberg/goldberg_emulator.git
synced 2024-11-14 10:50:13 +01:00
5b0306dccc
Every class has a job. Overlay is to show an overlay not to hook windows functions. Hook_Manager's job is to manage hooks and should not contain a reference to the overlay. (It should not contains any reference to directX or OpenGL either but I'll see that later... Maybe) This makes the overlay code much cleaner and "could" be used in Linux as well.
150 lines
No EOL
3.5 KiB
C++
150 lines
No EOL
3.5 KiB
C++
#include "OpenGL_Hook.h"
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#include "Windows_Hook.h"
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#include "Hook_Manager.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 <GL/glew.h>
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#include "steam_overlay.h"
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OpenGL_Hook* OpenGL_Hook::_inst = nullptr;
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bool OpenGL_Hook::start_hook()
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{
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if (!_hooked)
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{
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Hook_Manager::Inst().FoundRenderer(this);
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GLenum err = glewInit();
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if (err == GLEW_OK)
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{
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_hooked = true;
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PRINT_DEBUG("Hooked OpenGL\n");
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UnhookAll();
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BeginHook();
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HookFuncs(
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std::make_pair<void**, void*>(&(PVOID&)wglSwapBuffers, &OpenGL_Hook::MywglSwapBuffers)
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);
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EndHook();
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if (Windows_Hook::Inst().start_hook())
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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 OpenGL\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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return false;
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}
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}
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return true;
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}
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void OpenGL_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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Windows_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 OpenGL_Hook::prepareForOverlay(HDC hDC)
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{
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HWND hWnd = WindowFromDC(hDC);
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RECT rect;
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GetClientRect(hWnd, &rect);
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if (hWnd != Windows_Hook::Inst().GetGameHwnd())
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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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initialized = true;
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}
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ImGui_ImplOpenGL3_NewFrame();
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Windows_Hook::Inst().prepareForOverlay(hWnd);
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ImGui::NewFrame();
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get_steam_client()->steam_overlay->OverlayProc(rect.right, rect.bottom);
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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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// OpenGL Initialization functions
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//BOOL WINAPI OpenGL_Hook::MywglMakeCurrent(HDC hDC, HGLRC hGLRC)
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//{
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// auto res = hook->wglMakeCurrent(hDC, hGLRC);
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// hook->hook_ogl();
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// return res;
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//}
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/////////////////////////////////////////////////////////////////////////////////////
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BOOL WINAPI OpenGL_Hook::MywglSwapBuffers(HDC hDC)
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{
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OpenGL_Hook::Inst()->prepareForOverlay(hDC);
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return OpenGL_Hook::Inst()->wglSwapBuffers(hDC);
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}
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OpenGL_Hook::OpenGL_Hook():
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initialized(false),
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wglSwapBuffers(nullptr)
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{
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_library = LoadLibrary(DLL_NAME);
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// Hook to wglMakeCurrent so we know when it gets called.
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// If its called, then OpenGL will be used to render the overlay.
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//wglMakeCurrent = (decltype(wglMakeCurrent))GetProcAddress(_dll, "wglMakeCurrent");
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//wglSwapBuffers = (decltype(wglSwapBuffers))GetProcAddress(_dll, "wglSwapBuffers");
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//
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//BeginHook();
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//HookFuncs(
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// std::make_pair<void**, void*>(&(PVOID&)wglMakeCurrent, &OpenGL_Hook::MywglMakeCurrent)
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//);
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//EndHook();
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}
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OpenGL_Hook::~OpenGL_Hook()
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{
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PRINT_DEBUG("OpenGL Hook removed\n");
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resetRenderState();
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FreeLibrary(reinterpret_cast<HMODULE>(_library));
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_inst = nullptr;
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}
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OpenGL_Hook* OpenGL_Hook::Inst()
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{
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if (_inst == nullptr)
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_inst = new OpenGL_Hook;
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return _inst;
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}
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#endif//NO_OVERLAY
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