Moved every platform specific code to their own folder

2025-12-15 16:38:25 +01:00 · 2019-09-01 20:48:27 +02:00 · 2019-09-01 20:48:27 +02:00 · 1785ae6eaf
commit 1785ae6eaf
parent dd13377be7
37 changed files with 9 additions and 1460 deletions
--- a/overlay_experimental/windows/OpenGL_Hook.cpp
+++ b/overlay_experimental/windows/OpenGL_Hook.cpp
@ -0,0 +1,148 @@
+#include "OpenGL_Hook.h"
+#include "Windows_Hook.h"
+#include "Renderer_Detector.h"
+#include "../dll/dll.h"
+
+#ifndef NO_OVERLAY
+
+#include <imgui.h>
+#include <impls/imgui_impl_opengl3.h>
+
+#include <GL/glew.h>
+
+#include "steam_overlay.h"
+
+OpenGL_Hook* OpenGL_Hook::_inst = nullptr;
+
+bool OpenGL_Hook::start_hook()
+{
+    bool res = true;
+    if (!hooked)
+    {
+        if (!Windows_Hook::Inst()->start_hook())
+            return false;
+
+        GLenum err = glewInit();
+
+        if (err == GLEW_OK)
+        {
+            PRINT_DEBUG("Hooked OpenGL\n");
+
+            hooked = true;
+            Renderer_Detector::Inst().renderer_found(this);
+
+            UnhookAll();
+            BeginHook();
+            HookFuncs(
+                std::make_pair<void**, void*>(&(PVOID&)wglSwapBuffers, &OpenGL_Hook::MywglSwapBuffers)
+            );
+            EndHook();
+
+            get_steam_client()->steam_overlay->HookReady();
+        }
+        else
+        {
+            PRINT_DEBUG("Failed to hook OpenGL\n");
+            /* Problem: glewInit failed, something is seriously wrong. */
+            PRINT_DEBUG("Error: %s\n", glewGetErrorString(err));
+            res = false;
+        }
+    }
+    return true;
+}
+
+void OpenGL_Hook::resetRenderState()
+{
+    if (initialized)
+    {
+        ImGui_ImplOpenGL3_Shutdown();
+        Windows_Hook::Inst()->resetRenderState();
+        ImGui::DestroyContext();
+
+        initialized = false;
+    }
+}
+
+// Try to make this function and overlay's proc as short as possible or it might affect game's fps.
+void OpenGL_Hook::prepareForOverlay(HDC hDC)
+{
+    HWND hWnd = WindowFromDC(hDC);
+    RECT rect;
+
+    GetClientRect(hWnd, &rect);
+
+    if (hWnd != Windows_Hook::Inst()->GetGameHwnd())
+        resetRenderState();
+
+    if (!initialized)
+    {
+        ImGui::CreateContext();
+        ImGuiIO& io = ImGui::GetIO();
+        io.IniFilename = NULL;
+
+        ImGui_ImplOpenGL3_Init();
+
+        initialized = true;
+    }
+    ImGui_ImplOpenGL3_NewFrame();
+    Windows_Hook::Inst()->prepareForOverlay(hWnd);
+
+    ImGui::NewFrame();
+
+    get_steam_client()->steam_overlay->OverlayProc(rect.right, rect.bottom);
+
+    ImGui::EndFrame();
+
+    ImGui::Render();
+
+    ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+}
+
+BOOL WINAPI OpenGL_Hook::MywglSwapBuffers(HDC hDC)
+{
+    OpenGL_Hook::Inst()->prepareForOverlay(hDC);
+    return OpenGL_Hook::Inst()->wglSwapBuffers(hDC);
+}
+
+OpenGL_Hook::OpenGL_Hook():
+    initialized(false),
+    hooked(false),
+    wglSwapBuffers(nullptr)
+{
+    _library = LoadLibrary(DLL_NAME);
+}
+
+OpenGL_Hook::~OpenGL_Hook()
+{
+    PRINT_DEBUG("OpenGL Hook removed\n");
+
+    if (initialized)
+    {
+        ImGui_ImplOpenGL3_Shutdown();
+        ImGui::DestroyContext();
+    }
+
+    FreeLibrary(reinterpret_cast<HMODULE>(_library));
+
+    _inst = nullptr;
+}
+
+OpenGL_Hook* OpenGL_Hook::Inst()
+{
+    if (_inst == nullptr)
+        _inst = new OpenGL_Hook;
+
+    return _inst;
+}
+
+const char* OpenGL_Hook::get_lib_name() const
+{
+    return DLL_NAME;
+}
+
+void OpenGL_Hook::loadFunctions(wglSwapBuffers_t pfnwglSwapBuffers)
+{
+    wglSwapBuffers = pfnwglSwapBuffers;
+}
+
+#endif//NO_OVERLAY