Merge pull request #7450 from stenzek/glcontext

GLInterface refactoring/cleanup and runtime platform selection

1 files changed, 126 insertions, 0 deletions

diff --git a/Source/Core/Common/GL/GLContext.cpp b/Source/Core/Common/GL/GLContext.cpp
new file mode 100644
index 0000000000..b02e27778f
--- /dev/null
+++ b/Source/Core/Common/GL/GLContext.cpp
@@ -0,0 +1,126 @@
+// Copyright 2014 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include <memory>
+
+#include "Common/GL/GLContext.h"
+
+#if defined(__APPLE__)
+#include "Common/GL/GLInterface/AGL.h"
+#endif
+#if defined(WIN32)
+#include "Common/GL/GLInterface/WGL.h"
+#endif
+#if HAVE_X11
+#include "Common/GL/GLInterface/GLX.h"
+#endif
+#if HAVE_EGL
+#include "Common/GL/GLInterface/EGL.h"
+#if HAVE_X11
+#include "Common/GL/GLInterface/EGLX11.h"
+#endif
+#if defined(ANDROID)
+#include "Common/GL/GLInterface/EGLAndroid.h"
+#endif
+#endif
+
+const std::array<std::pair<int, int>, 9> GLContext::s_desktop_opengl_versions = {
+    {{4, 6}, {4, 5}, {4, 4}, {4, 3}, {4, 2}, {4, 1}, {4, 0}, {3, 3}, {3, 2}}};
+
+GLContext::~GLContext() = default;
+
+bool GLContext::Initialize(void* display_handle, void* window_handle, bool stereo, bool core)
+{
+  return false;
+}
+
+bool GLContext::IsHeadless() const
+{
+  return true;
+}
+
+std::unique_ptr<GLContext> GLContext::CreateSharedContext()
+{
+  return nullptr;
+}
+
+bool GLContext::MakeCurrent()
+{
+  return false;
+}
+
+bool GLContext::ClearCurrent()
+{
+  return false;
+}
+
+void GLContext::Update()
+{
+}
+
+void GLContext::UpdateSurface(void* window_handle)
+{
+}
+
+void GLContext::Swap()
+{
+}
+
+void GLContext::SwapInterval(int interval)
+{
+}
+
+void* GLContext::GetFuncAddress(const std::string& name)
+{
+  return nullptr;
+}
+
+std::unique_ptr<GLContext> GLContext::Create(const WindowSystemInfo& wsi, bool stereo, bool core,
+                                             bool prefer_egl, bool prefer_gles)
+{
+  std::unique_ptr<GLContext> context;
+#if defined(__APPLE__)
+  if (wsi.type == WindowSystemType::MacOS || wsi.type == WindowSystemType::Headless)
+    context = std::make_unique<GLContextAGL>();
+#endif
+#if defined(_WIN32)
+  if (wsi.type == WindowSystemType::Windows)
+    context = std::make_unique<GLContextWGL>();
+#endif
+#if defined(ANDROID)
+  if (wsi.type == WindowSystemType::Android)
+    context = std::make_unique<GLContextEGLAndroid>();
+#endif
+#if HAVE_X11
+  if (wsi.type == WindowSystemType::X11)
+  {
+    // GLES 3 is not supported via GLX.
+    const bool use_egl = prefer_egl || prefer_gles;
+#if defined(HAVE_EGL)
+    if (use_egl)
+      context = std::make_unique<GLContextEGLX11>();
+    else
+      context = std::make_unique<GLContextGLX>();
+#else
+    context = std::make_unique<GLContextGLX>();
+#endif
+  }
+#endif
+#if HAVE_EGL
+  if (wsi.type == WindowSystemType::Headless)
+    context = std::make_unique<GLContextEGL>();
+#endif
+
+  if (!context)
+    return nullptr;
+
+  // Option to prefer GLES on desktop platforms, useful for testing.
+  if (prefer_gles)
+    context->m_opengl_mode = Mode::OpenGLES;
+
+  if (!context->Initialize(wsi.display_connection, wsi.render_surface, stereo, core))
+    return nullptr;
+
+  return context;
+}