[OGL] Update extension checks in Render.

This was relying on behaviour that GLExtensions was adding fake extensions to the supported list with ES.
This no longer happens so it needed to be changed.

Source/Core/VideoBackends/OGL/Render.cpp

@@ -336,6 +336,14 @@ Renderer::Renderer()
 
 	InitDriverInfo();
 
+	if (GLExtensions::Version() < 300)
+	{
+		// integer vertex attributes require a gl3 only function
+		PanicAlert("GPU: OGL ERROR: Need OpenGL version 3.\n"
+				"GPU: Does your video card support OpenGL 3?");
+		bSuccess = false;
+	}
+
 	// check for the max vertex attributes
 	GLint numvertexattribs = 0;
 	glGetIntegerv(GL_MAX_VERTEX_ATTRIBS, &numvertexattribs);
@@ -357,6 +365,8 @@ Renderer::Renderer()
 		bSuccess = false;
 	}
 
+	if (GLInterface->GetMode() == GLInterfaceMode::MODE_OPENGL)
+	{
 		if (!GLExtensions::Supports("GL_ARB_framebuffer_object"))
 		{
 			// We want the ogl3 framebuffer instead of the ogl2 one for better blitting support.
@@ -408,22 +418,15 @@ Renderer::Renderer()
 			bSuccess = false;
 		}
 
-	if (GLExtensions::Version() < 300)
-	{
-		// integer vertex attributes require a gl3 only function
-		PanicAlert("GPU: OGL ERROR: Need OpenGL version 3.\n"
-				"GPU: Does your video card support OpenGL 3?");
-		bSuccess = false;
-	}
-
 		// OpenGL 3 doesn't provide GLES like float functions for depth.
 		// They are in core in OpenGL 4.1, so almost every driver should support them.
 		// But for the oldest ones, we provide fallbacks to the old double functions.
-	if (!GLExtensions::Supports("GL_ARB_ES2_compatibility") && GLInterface->GetMode() == GLInterfaceMode::MODE_OPENGL)
+		if (!GLExtensions::Supports("GL_ARB_ES2_compatibility"))
 		{
 			glDepthRangef = DepthRangef;
 			glClearDepthf = ClearDepthf;
 		}
+	}
 
 	g_Config.backend_info.bSupportsDualSourceBlend = GLExtensions::Supports("GL_ARB_blend_func_extended") ||
 	                                                 GLExtensions::Supports("GL_EXT_blend_func_extended");
@@ -456,7 +459,6 @@ Renderer::Renderer()
 	g_ogl_config.bSupportsGLBufferStorage = GLExtensions::Supports("GL_ARB_buffer_storage") ||
 	                                        GLExtensions::Supports("GL_EXT_buffer_storage");
 	g_ogl_config.bSupportsMSAA = GLExtensions::Supports("GL_ARB_texture_multisample");
-	g_ogl_config.bSupportOGL31 = GLExtensions::Version() >= 310;
 	g_ogl_config.bSupportViewportFloat = GLExtensions::Supports("GL_ARB_viewport_array");
 	g_ogl_config.bSupportsDebug = GLExtensions::Supports("GL_KHR_debug") ||
 	                              GLExtensions::Supports("GL_ARB_debug_output");
@@ -474,6 +476,9 @@ Renderer::Renderer()
 		                                        GLExtensions::Supports("GL_OES_texture_buffer") ? ES_TEXBUF_TYPE::TEXBUF_OES :
 		                                        GLExtensions::Supports("GL_EXT_texture_buffer") ? ES_TEXBUF_TYPE::TEXBUF_EXT : ES_TEXBUF_TYPE::TEXBUF_NONE;
 
+		g_ogl_config.bSupportsGLSLCache = true;
+		g_ogl_config.bSupportsGLSync = true;
+
 		if (strstr(g_ogl_config.glsl_version, "3.0") || DriverDetails::HasBug(DriverDetails::BUG_BROKENGLES31))
 		{
 			g_ogl_config.eSupportedGLSLVersion = GLSLES_300;
@@ -687,7 +692,7 @@ Renderer::Renderer()
 		}
 		else
 		{
-			if (g_ogl_config.bSupportOGL31)
+			if (GLExtensions::Version() >= 310)
 			{
 				glEnable(GL_PRIMITIVE_RESTART);
 				glPrimitiveRestartIndex(65535);

Source/Core/VideoBackends/OGL/Render.h

@@ -41,7 +41,6 @@ struct VideoConfig
 	bool bSupportsGLBufferStorage;
 	bool bSupportsMSAA;
 	GLSL_VERSION eSupportedGLSLVersion;
-	bool bSupportOGL31;
 	bool bSupportViewportFloat;
 	bool bSupportsAEP;
 	bool bSupportsDebug;