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[Feat] (WGL): add Windows host layer - drop-in opengl32.dll with WGL over EGLImpl, Win32 window backend plumbing for both backends, ANGLE loader path, and leak-at-exit process teardown

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swung0x48
2026-07-26 06:46:29 -04:00
parent 199164c2e0
commit c4254c4bbd
14 changed files with 1067 additions and 22 deletions
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MobileGL/MG_Util/BackendLoaders/OpenGL/Loader.cpp
+27 -3
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@@ -9,7 +9,12 @@
#include "Loader.h"
#include "MG_Util/Types.h"
#include <Config.h>
#if !defined(__WIN32) && !defined(_WIN32)
#if defined(_WIN32)
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN 1
#endif
#include <windows.h>
#else
#include <dlfcn.h>
#endif
@@ -60,7 +65,14 @@ namespace MobileGL::MG_Util::BackendLoader {
#endif
static void* OpenLib(const Vector<String>& names) {
#if !defined(__WIN32) && !defined(_WIN32) && (!defined(__APPLE__) || defined(MOBILEGL_IOS))
#if defined(_WIN32)
for (const auto& name : names) {
if (HMODULE lib = LoadLibraryA(name.c_str())) {
MGLOG_I("Loaded GL backend library: %s", name.c_str());
return reinterpret_cast<void*>(lib);
}
}
#elif !defined(__APPLE__) || defined(MOBILEGL_IOS)
static const String LibPathPrefixes[] = {
#if defined(MOBILEGL_IOS)
"@rpath/", "@executable_path/Frameworks/", "@loader_path/Frameworks/",
@@ -104,7 +116,9 @@ namespace MobileGL::MG_Util::BackendLoader {
}
inline void* ProcAddress(void* lib, const char* name) {
#if !defined(__WIN32) && !defined(_WIN32) && (!defined(__APPLE__) || defined(MOBILEGL_IOS))
#if defined(_WIN32)
return reinterpret_cast<void*>(::GetProcAddress(reinterpret_cast<HMODULE>(lib), name));
#elif !defined(__APPLE__) || defined(MOBILEGL_IOS)
return dlsym(lib, name);
#else
return nullptr;
@@ -520,6 +534,15 @@ namespace MobileGL::MG_Util::BackendLoader {
#if defined(MOBILEGL_TRACE_ANGLE_VARIANTS) && defined(__ANDROID__)
void* angleGlesLib = nullptr;
#endif
#if defined(_WIN32)
// ANGLE is the GLES provider on Windows regardless of UseAngle(). Preload
// libGLESv2.dll so libEGL.dll resolves its dependency from the same directory.
if (!OpenLib({"libGLESv2.dll"})) {
MGLOG_E("Failed to open ANGLE libGLESv2.dll");
return;
}
eglLib = OpenLib({"libEGL.dll"});
#else
if (UseAngle()) {
void* glesLib = OpenLib({"libGLESv2_angle.so"});
if (!glesLib) {
@@ -541,6 +564,7 @@ namespace MobileGL::MG_Util::BackendLoader {
eglLib = OpenLib({"libEGL.so"});
#endif
}
#endif // !_WIN32
if (!eglLib) {
MGLOG_E("Failed to open EGL library");