Initial support for Haiku.

Source/Core/Common/GL/GLInterface/EGLHaiku.cpp

@@ -0,0 +1,30 @@
+// Copyright 2017 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "Common/GL/GLInterface/EGLHaiku.h"
+
+#include <Window.h>
+
+EGLDisplay cInterfaceEGLHaiku::OpenDisplay()
+{
+  return eglGetDisplay(EGL_DEFAULT_DISPLAY);
+}
+
+EGLNativeWindowType cInterfaceEGLHaiku::InitializePlatform(EGLNativeWindowType host_window,
+                                                           EGLConfig config)
+{
+  EGLint format;
+  eglGetConfigAttrib(egl_dpy, config, EGL_NATIVE_VISUAL_ID, &format);
+
+  BWindow* window = reinterpret_cast<BWindow*>(host_window);
+  const int width = window->Size().width;
+  const int height = window->Size().height;
+  GLInterface->SetBackBufferDimensions(width, height);
+
+  return host_window;
+}
+
+void cInterfaceEGLHaiku::ShutdownPlatform()
+{
+}