Implement AbstractGfx for OpenGL

Mostly involves moving contents of OGLRender
to OGLGfx and OGLConfig

Source/Core/VideoBackends/OGL/OGLConfig.h

@@ -0,0 +1,78 @@
+// Copyright 2023 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "Common/CommonTypes.h"
+
+class GLContext;
+
+namespace OGL
+{
+enum GlslVersion
+{
+  Glsl130,
+  Glsl140,
+  Glsl150,
+  Glsl330,
+  Glsl400,  // and above
+  Glsl430,
+  GlslEs300,  // GLES 3.0
+  GlslEs310,  // GLES 3.1
+  GlslEs320,  // GLES 3.2
+};
+enum class EsTexbufType
+{
+  TexbufNone,
+  TexbufCore,
+  TexbufOes,
+  TexbufExt
+};
+
+enum class EsFbFetchType
+{
+  FbFetchNone,
+  FbFetchExt,
+  FbFetchArm,
+};
+
+// ogl-only config, so not in VideoConfig.h
+struct VideoConfig
+{
+  bool bIsES;
+  bool bSupportsGLPinnedMemory;
+  bool bSupportsGLSync;
+  bool bSupportsGLBaseVertex;
+  bool bSupportsGLBufferStorage;
+  bool bSupportsMSAA;
+  GlslVersion eSupportedGLSLVersion;
+  bool bSupportViewportFloat;
+  bool bSupportsAEP;
+  bool bSupportsDebug;
+  bool bSupportsCopySubImage;
+  u8 SupportedESPointSize;
+  EsTexbufType SupportedESTextureBuffer;
+  bool bSupportsTextureStorage;
+  bool bSupports2DTextureStorageMultisample;
+  bool bSupports3DTextureStorageMultisample;
+  bool bSupportsConservativeDepth;
+  bool bSupportsImageLoadStore;
+  bool bSupportsAniso;
+  bool bSupportsBitfield;
+  bool bSupportsTextureSubImage;
+  EsFbFetchType SupportedFramebufferFetch;
+  bool bSupportsShaderThreadShuffleNV;
+
+  const char* gl_vendor;
+  const char* gl_renderer;
+  const char* gl_version;
+
+  s32 max_samples;
+};
+
+void InitDriverInfo();
+bool PopulateConfig(GLContext* main_gl_context);
+
+extern VideoConfig g_ogl_config;
+
+}  // namespace OGL